LG OLED C4 vs TCL P7K / P79K

Direct compare

C45 / C41

Info

P7K / P79K

Info

Available screen sizes: 42”48”55”65”77”83”

Available screen sizes: 43”50”55”65”75”85”

Panel type: WRGB OLED

Resolution: 3840x2160

System: WebOS

Model year: 2024

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Panel type: LCD VA

Resolution: 3840x2160

System: Android TV

Model year: 2025

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Overall rating

8.2

5.8

  • Movies and series in UHD quality

    8.2

    5.1

  • Classic TV, YouTube

    8.8

    5.5

  • Sports broadcasts (TV and apps)

    8.6

    5.3

  • Gaming on console

    9.3

    7.1

  • TV as a computer monitor

    8.6

    2.0

  • Watching in bright light

    5.7

    4.6

  • Utility functions

    8.9

    7.0

  • Apps

    9.1

    9.6

  • Sound quality

    7.5

    6.2

Advantages

  • High efficiency in HDR materials

  • Very good colour reproduction after calibration

  • Faithfulness to the image with directorial vision

  • Excellent collaboration with consoles and PCs - low input lag, a wealth of conveniences

  • Advanced motion smoothing system

  • Great blacks and high contrast

  • Support for 120 Hz in gaming (at lower resolutions)

  • Very low responsiveness (input lag), great for fast-paced gaming

  • Modern features for gamers, such as VRR and ALLM

  • Efficient Google TV system with a vast app base

  • Very well-functioning Google Assistant in Polish

  • Easy screen mirroring from your phone (support for AirPlay)

  • Attractive price

Disadvantages

No like
  • Sometimes visible tonal transitions

  • Low brightness, which makes the HDR effect weak and the image poorly visible in sunlight

  • The image loses quality and colour when viewed from an angle

  • Not suitable as a computer monitor due to very poor text readability

  • Strong dithering phenomenon (highly digital image)

Our verdict

LG C4 is a television that, in its price range, will likely have no competition for many users. Thanks to its extensive capabilities, it will appeal to those looking for a television not only for films and series but also for gaming. The advanced WebOS system and a remote control that functions like a mouse will certainly be a significant convenience in everyday use, making it likely that we will stick with this brand for much longer. The OLED panel implemented by the manufacturer, resulting from over 10 years of history, shows that this brand has not yet said its last word. The brightness results in HDR materials are very solid and can deliver an incredibly dynamic and deep image. It is worth mentioning the excellently implemented dynamic tone mapping feature, which makes HDR10 content look almost as good as Dolby Vision. And when it comes to fidelity to artistic vision, one cannot overlook how calibratable LG televisions are, allowing considerable freedom for calibrators and classic calibration for home users, as well as 3D LUT for professionals. However, if we are looking for a gaming television, then the LG C4, like most of the manufacturer’s OLED televisions, will be an ideal choice. With the implementation of HDMI 2.1 ports and the full utilisation of their potential, we can enjoy incredibly smooth gameplay with all the benefits, such as VRR, ALLM, FreeSync, and G-Sync. Of course, the panel, with a maximum refresh rate of 144 Hz and an advanced motion smoother, will also provide a very smooth and sharp image during the broadcast of various sporting events. It is hard not to give a high rating to LG OLED C4, as a television in a similar price range with such advanced features is difficult to find among the competition.

The time has come to gather all observations. The TCL P7K / P79K is a television that cleverly juggles compromises, offering much more in its price range than we could have expected. Its undeniable asset is the VA panel, guaranteeing deep blacks and high contrast, and the surprisingly rich package for gamers (with VRR and support for 120 Hz at lower resolutions) makes it a phenomenal proposition for console owners. The whole is tied together by the functional Google TV system. Of course, the low peak brightness means that HDR content lacks spectacular bursts, and the TV's performance in sunlit rooms is limited. And although, at its relatively low price, the P7K / P79K is quite a decent option, its biggest rival turns out to be… its more refined sibling, the P8K. Often, FOR a small additional payment, we get a device of a higher class – with a native 4K 144 Hz panel, significantly better audio system, and generally higher quality of operation, which is reflected in its much higher rating on our portal. Therefore, the final verdict must be as follows: if your budget is absolutely non-negotiable, the P7K / P79K will be a good and cost-effective choice. However, if you can afford to add a small amount, the P8K model will offer significantly more and will ultimately be a more satisfying investment.

TV appearance

HDMI inputs
0 x HDMI 2.0, 4 x HDMI 2.1 (48Gbps)
0 x HDMI 2.0, 3 x HDMI 2.1 (48Gbps)
Other inputs
Toslink (Optical audio)
Outputs
Toslink (Optical audio), eARC (HDMI), ARC (HDMI)
Toslink (Optical audio), eARC (HDMI), ARC (HDMI)
Network Interfaces
Wi-Fi 2.4GHz, Wi-Fi 5GHz, Ethernet (LAN) 100Mbps
Wi-Fi 2.4GHz, Wi-Fi 5GHz, Ethernet (LAN) 100Mbps
Build quality
Premium
Average
Stand type
Central
Legs
Bezel colour
Silver
Graphite
Stand
Fixed
Fixed
Accessories
Stand
Stand

Contrast and black detail

10/10

5.2/10

Local dimming function: No

Contrast:

Review LG OLED C4 Contrast and black detail

Result

:1

Review LG OLED C4 Contrast and black detail

Result

:1

Review LG OLED C4 Contrast and black detail

Result

:1

Review LG OLED C4 Contrast and black detail

Result

:1

Review LG OLED C4 Contrast and black detail

Result

:1

Review TCL P7K / P79K Contrast and black detail

Result

4,000:1

Review TCL P7K / P79K Contrast and black detail

Result

6,500:1

Review TCL P7K / P79K Contrast and black detail

Result

2,700:1

Review TCL P7K / P79K Contrast and black detail

Result

2,800:1

Review TCL P7K / P79K Contrast and black detail

Result

3,800:1

Halo effect and black detail visibility:

Review LG OLED C4 Contrast and black detail
Review TCL P7K / P79K Contrast and black detail
Review LG OLED C4 Contrast and black detail
Review TCL P7K / P79K Contrast and black detail

LG OLED C4, as the name suggests, uses an organic panel of its own production. This series definitely ranks among the most recognisable on the market. Over 10 years of experience in the construction of self-emitting panels has allowed for the refinement of each subsequent design, with the models from the 2024 vintage being the epitome of this. Of course, the use of this type of screen enables the achievement of impeccable contrast and blacks, allowing for immersion in the world created by the director. This is made possible by the OLED panel, characterised by the absence of conventional backlighting, with current passing through organic pixels instead. This allows for super-accurate control of the image, thereby eliminating issues such as the dimming of delicate fine details or the halo/blooming effect. Looking at both of our test scenes, we can observe two things: perfect separation of lights and a whole plethora of details in the film "Sicario 2".

In the discussion about image quality, the conversation almost always begins with the issue of black depth and contrast, which are parameters that define the plasticity and realism of the observed world. Here, the TCL P7k/P79k immediately lays its strongest asset on the table – a VA panel. Its construction is what makes the native relation between the brightest and darkest parts of the image more than satisfactory, especially in the context of the price segment that this model represents. In the majority of scenes, the black achieved has a noble depth, which allows for building an engaging spectacle for the viewer. To illustrate the scale, it is worth mentioning that competing constructions based on IPS panels often offer results that are even four times, and sometimes five times, lower, which in direct comparison represents a chasm. Of course, when entering the territory of models oriented towards affordability, we must be aware of certain compromises. Therefore, we will not find an advanced local dimming system in the discussed television, which could further enhance the sense of contrast. However, the absence of this feature is fully understandable and constitutes a logical consequence of positioning the product in the market – this technology in TCL's portfolio for 2025 has been reserved for higher positioned, more prestigious series marked with the letter "C".

HDR effect quality

6.8/10

4.3/10

Supported formats
HDR10, Dolby Vision, HLG
HDR10, HDR10+, Dolby Vision, HLG
Color gamut coverage
DCI P3: 99.0%, Bt.2020: 75.0%
DCI P3: 86.3%, Bt.2020: 65.0%

Luminance measurements in HDR:

Review LG OLED C4 Brightness measurement

Result

796 nit

Review LG OLED C4 Brightness measurement

Result

772 nit

Review LG OLED C4 Brightness measurement

Result

869 nit

Review LG OLED C4 Brightness measurement

Result

837 nit

Review LG OLED C4 Brightness measurement

Result

604 nit

Review TCL P7K / P79K Brightness measurement

Result

206 nit

Review TCL P7K / P79K Brightness measurement

Result

247 nit

Review TCL P7K / P79K Brightness measurement

Result

297 nit

Review TCL P7K / P79K Brightness measurement

Result

237 nit

Review TCL P7K / P79K Brightness measurement

Result

281 nit

Scene from the movie “Pan” (about 2800 nits)

Review LG OLED C4 HDR effect quality
Review TCL P7K / P79K HDR effect quality

Scene from the movie “Billy Lynn” (about 1100 nits)

Review LG OLED C4 HDR effect quality
Review TCL P7K / P79K HDR effect quality

Static HDR10

Review LG OLED C4 HDR effect quality
Review TCL P7K / P79K HDR effect quality

Dynamic: Dolby Vision

Dynamic: Dolby Vision

Review LG OLED C4 HDR effect quality
Review TCL P7K / P79K HDR effect quality

HDR luminance chart:

TCL P7K / P79K

HDR luminance

LG OLED C4

HDR luminance

Luminance of RGB colors

The results of HDR materials are definitely among the better ones. Practically every film significantly exceeds the 700 nits barrier, allowing for a very realistic image. Of course, none of them surpasses the magical thousand, yet the combination of such results and unlimited contrast and black effectively boosts the outcome optically. The last of the scenes, featuring a full-screen burst of sunlight, is actually less bright than the others, although it still represents a commendable level. It is also worth mentioning the excellent coverage of the DCI-P3 colour palette, which will allow for achieving extremely vivid colours.

When turning to the assessment of HDR performance, we must be clear and without marketing embellishments: the P7K/P79K is not, and was never intended to be, a master in this field. The maximum peak brightness that this panel can generate hovers around a mere 300 nits. This represents a threshold, a kind of thin red line between what can be considered a barely satisfactory HDR signal and what is, in fact, not much different from standard dynamic range (SDR), unfortunately leaning towards the latter. Synthetic tests found brutal confirmation in reality – our measurements taken during movie screenings showed that luminance in key bright portions of the scenes rarely exceeded the ceiling of 200-250 nits. Thus, this is not a television that would allow content realised in a wide tonal range to spread its wings, and this must be openly admitted.

Unfortunately, the issue of colour reproduction is presented with equal restraint. Although the manufacturer positions this model within the "QLED" family, thanks to the use of a PFS LED filter, the results do not match the heightened expectations. The coverage of the wide DCI-P3 colour gamut reaches only 86%. In the context of the market, this is at best an average result, as most devices that employ additional layers to expand the colour spectrum easily achieve values at a minimum level of 90-92%.

Factory color reproduction

8.1/10

5.9/10

Review LG OLED C4 Factory color reproduction
Review TCL P7K / P79K Factory color reproduction

Factory Mode

After calibration

Review LG OLED C4 Factory color reproduction
Review TCL P7K / P79K Factory color reproduction

Factory Mode

After calibration

The best factory mode implemented in the tested television was "Filmmaker". It was this mode that we used during all tests. This mode proved to be quite good in terms of colour reproduction; however, other shortcomings effectively detracted from the enjoyment of viewing. Starting with the most basic aspect, the white balance, it was easy to notice that it was marked by a dominance of red, which overall changed the characteristics of the image. We could thus see a strong yellowing of the whites and a shift of all colours towards warmer shades. The gamma, which is a curve just as important, if not more so, was quite significantly lowered, resulting in a considerable drop in contrast, except at the beginning of the graph, where the television insidiously lost details. That’s all regarding SDR materials. Taking a closer look at films with a wide dynamic range, we can observe exactly the same phenomenon of yellowing of the white balance as in films with a standard colour palette. The EOTF curve, which replaces our gamma curve, is practically perfect and cannot be faulted.

Every accurate assessment of image quality must begin with selection of the most optimal factory mode. In the case of the tested model P7K/P79K, the choice was made without hesitation for the "Film" mode. It is this mode that presents an image closest to the intentions of the creators, avoiding both the exaggerated brightness of the dynamic mode and the excessive dimming known from eco settings. And it must be admitted that, for a device in this price range, the factory calibration is surprisingly decent, although it has not escaped a few missteps. The most noticeable flaw turned out to be the not completely correctly set white balance. A slight dominance of the blue component gives the image a subtly cool, cold character, thus deviating from the exemplary neutrality that the director wanted to show us. The television performs much better in reproducing the greyscale in the standard dynamic range – the gamma curve is nearly exemplary. The only minor reservation could be made regarding the darkest parts of the image, where a slight deviation from the norm causes a loss of some detail in the shadows. The most serious challenge for the TCL software, however, was interpreting the HDR signal, as illustrated by the course of the EOTF curve. The television follows its own, quite free path here – the darkest details are disproportionately brightened, after which there is a noticeable slowdown in the increase of brightness for midtones. Fortunately, most of these imperfections are software-related issues that can be eliminated. With this thought in mind, we began the process of professional calibration.

Color reproduction after calibration

9.5/10

7/10

Review LG OLED C4 Color reproduction after calibration
Review TCL P7K / P79K Color reproduction after calibration
Review LG OLED C4 Color reproduction after calibration
Review TCL P7K / P79K Color reproduction after calibration

As we mentioned earlier, LG televisions are equipped with advanced tools for carrying out the calibration process. We therefore used them to model the image in the way that the director intended. And without modesty, we must admit that we achieved this phenomenally. Both SDR and HDR materials present a level that clearly indicates that this is how a film should look. It is worth looking at the colour errors on the "ColorChecker" palette here, where practically none of them exceeds "1", apart from two samples.

The calibration process turned out to be spot on, particularly in the context of standard dynamic range (SDR) content. We successfully mitigated the television's tendency to emphasize cool tones, restoring the whiteness to its natural neutrality. Moreover, precise adjustments allowed us to correct a slight error in the gamma curve, ensuring that the darkest parts of the image regained their proper depth, without any trace of unnatural brightness. The effects are measurable and impressive – in the ColorChecker test, the overwhelming majority of colour reproduction errors fell below the perceptual threshold, achieving a deltaE value of under 2. This is a result that pricier models would not be ashamed of. Unfortunately, when it comes to HDR content, we encounter a barrier in the form of the inherent limitations of the panel itself. And although we managed to bring the colours into line, the software's characteristics mean that the television still adapts brightness in its own way, as evidenced by the persistent, non-standard EOTF curve. In summary, calibration adds immense value, but one must be aware that it cannot overcome certain physical barriers. The slightly elevated black level, due to the lack of local dimming, along with limited peak brightness, means that HDR content may not always be able to showcase its full potential. This is simply not the primary task of this display; its true strength, especially after professional tuning, lies in the viewing of SDR material.

Smoothness of tonal transitions

7.1/10

5/10

Review LG OLED C4 Smoothness of tonal transitions
Review TCL P7K / P79K Smoothness of tonal transitions
Review LG OLED C4 Smoothness of tonal transitions
Review TCL P7K / P79K Smoothness of tonal transitions
Review LG OLED C4 Smoothness of tonal transitions
Review TCL P7K / P79K Smoothness of tonal transitions
Review LG OLED C4 Smoothness of tonal transitions
Review TCL P7K / P79K Smoothness of tonal transitions

The fluidity of tonal transitions in LG televisions has always been a fairly sensitive issue, as the manufacturer, despite impeccable performance in other areas, has almost always struggled to get this right. The results of the assessment of the fluidity of tonal transitions in the tested television were quite good, and the problems are mainly visible in darker scenes, such as the last two scenes. Interestingly, this is a result that is definitely better than the highest model from the manufacturer, namely the LG G4.

The issue of the fluidity of tonal transitions, or popular grading, is another area where the P7K / P79K evokes mixed feelings and surprises with its dual nature. If we were to evaluate solely its ability to render smooth colour gradients, we would undoubtedly give it a solid score of 8/10. Unfortunately, this positive image is marred by the use of very aggressive and unpleasant dithering. This artefact is particularly noticeable on demanding test patterns – such as the one depicting an actor submerged in red water – where rough, unnatural texture appears on uniform colour surfaces, betraying the digital nature of the image. This is all the more disappointing, as it is not a new issue. It seems to be a sort of inheritance from previous generations of budget TCL models, which is a pity, as it represents a flaw on what is fundamentally a quite competent image and is a mistake that could have been avoided.

Image scaling and smoothness of tonal transitions

8/10

7/10

Image without overscan on the SD signal
OK
OK
Smooth transition function
OK
OK

Smooth transition function

Review LG OLED C4 Image scaling and smoothness of tonal transitions
Review TCL P7K / P79K Image scaling and smoothness of tonal transitions

Image without overscan on the SD signal

Review LG OLED C4 Image scaling and smoothness of tonal transitions
Review TCL P7K / P79K Image scaling and smoothness of tonal transitions

Once again, we will take a look at the function responsible for smooth gradation, but we will also address the one that aims to improve the quality of lower-quality materials. The default smoothing of tonal transitions, as we have seen, was not the worst, but it can still be improved. The function has a slider, which allows us to adjust its strength. We recommend using the first one, as it yields very good results and does not blur important details.

Image scaling in LG C4 is quite good; however, it cannot be said to be without flaws. The image is slightly sharper by default, although not in a very noticeable way. Admittedly, there are jagged edges on the trees, but this is not a major issue compared to other manufacturers.

After a series of harsh evaluations, fortunately, the time comes for praise, and this is due to the TCL AiPQ image processor for its work in the field of digital processing and content scaling. It should be noted right away that we are not talking about the level known from flagship designs; however, in the price segment represented by the P7K/P79K, the results achieved are more than solid. The feature for smoothing tonal transitions performs particularly well, effectively eliminating posterisation, which are the characteristic bands often visible in highly compressed materials, for example, from the ChooseTV service. The algorithm adeptly removes unwanted gradients, which ultimately looks really good. The television also handles upscaling competently, which is the task of elevating low-resolution materials to 4K standard. The resulting image, although it may initially seem a bit too sharp, fortunately, is not a problem. The software allows for free adjustment of this parameter using a sharpness slider, making it easy to customise the final appearance to personal preferences.

Blur and motion smoothness

8.5/10

4.8/10

Maximum refresh rate of the panel
144Hz
60Hz
Film motion smoothing option
OK
OK
Blur reduction option
OK
No
BFI function 60Hz
Yes, 60Hz (image flickers)
No
BFI function 120Hz
No
No
Brightness drop with BFI
49%
-%

Blur (native resolution, maximum refresh rate):

Blur (BFI function enabled):

Image flickers in this mode

The maximum refresh rate that we can set on the LG G4 is 144 Hz. Naturally, this is only possible when connecting the television to a very powerful PC. In other cases, we will be operating at a maximum refresh rate of 120 Hz, which is recommended if we primarily want to watch sport or content with a lot of motion dynamics. For those requiring high fluidity of the image, the manufacturer has implemented a multi-step motion smoother called "TrueMotion". It has been divided into two separate sliders that adjust the sharpness of moving images (De-Blur) and judder (De-Judder). Both sliders can be set within a range from 0 to 10, with each degree affecting the degree of smoothing, allowing everyone to find their golden mean.

The LG OLED C4 panel features an average response time of less than 1 ms (which directly results from our measurements), allowing for an incredibly clear image that is unattainable for LCD televisions, whose response times can be as high as several milliseconds. This is clearly visible in the pictures from the "UFO Test," showing no trailing blur behind the object.

The issue of fluidity and sharpness of the image in motion is inextricably linked to a fundamental parameter of the matrix, and in the case of the TCL P7K/P79K, we are dealing with a panel with a native refresh rate of 60 Hz. This specification defines its capabilities from the outset and makes it difficult to unequivocally recommend it to enthusiasts of dynamic sports broadcasts. During fast camera movements, the image loses sharpness, and the panel also shows a slight tendency to smearing, which may be noticeable to more sensitive viewers. Fortunately, not everything in this aspect has been left to chance. The manufacturer has implemented a simple motion smoothing system, which is primarily used in film material recorded at 24 or 30 frames per second. Thanks to a dedicated slider, users can decide for themselves the final character of the motion – from maintaining a fully cinematic, slightly juddery image to achieving a very smooth, almost theatrical effect. It is a simple but effective tool that allows users to tailor the viewing experience to their own preferences.

Console compatibility and gaming features

10/10

6.7/10

  • ALLM
    Yes
    Yes
  • VRR
    Yes
    Yes
  • VRR range
    40 - 144Hz
    48 - 120Hz
  • Dolby Vision Game Mode
    Yes
    Yes
  • Correct implementation of HGIG
    Yes
    No
  • 1080p@120Hz
    Yes
    Yes
  • 1440p@120Hz
    Yes
    Yes
  • 4K@120Hz
    Yes
    No
  • Game bar
    Yes
    Yes

We can already say that LG C4, like practically every OLED television from the manufacturer, is exceptionally good in terms of compatibility with consoles and PCs. Thanks to the implementation of four full bandwidth HDMI 2.1 ports at 48 Gbps, the manufacturer has included all features that enhance the gaming experience, among which we find simultaneous support for FreeSync and G-Sync technology. With such a tandem, gamers with a graphics card from AMD or Nvidia can confidently opt for C4. However, what should delight the players requiring the highest possible quality the most is the simultaneous implementation of HDR Dolby Vision and HGIG mode. The first is particularly important as it works with extremely low input lag in all settings.

A standard in the Korean manufacturer's televisions is also the implementation of GameBar, allowing for quick adjustments of settings "on the fly" without the need to exit the game. It also enables image adjustments for visually impaired individuals, which is a very nice touch. Another important piece of information is that when VRR technology is enabled, we will not experience a drop in contrast. This is, of course, due to the panel's design and the absence of conventional backlighting. However, it is normal for shades of grey to flicker slightly, although this is a characteristic feature of this function regardless of the manufacturer and television.

In summary: LG C4, just like all of the manufacturer's OLEDs equipped with high refresh rate panels and HDMI 2.1 ports, creates a harmonious whole with consoles. In practice, it is a complete television, and if we expect the highest possible performance in gaming, C4 will be an ideal choice.

Although on paper the native 4K@60Hz panel might suggest that the TCL P7K/P79K is not a television tailored for gamers, the reality is surprisingly different. On the contrary, the manufacturer has ensured a rich package of features that make it a very friendly companion for next-generation consoles. Onboard, we find key technologies such as ALLM, which provides automatic switching to low latency mode, and VRR, or variable refresh rate, which eliminates screen tearing. The list is complemented by support for Dolby Vision Gaming and a simple yet functional Game Bar. However, the real and extremely pleasant surprise is something else. It turns out that the television easily supports a high refresh rate signal of 120 Hz but at lower resolutions – 1080p and 1440p. This is fantastic news for console owners, who know well how rarely games run in native 4K at a full 120 frames per second. The ability to choose between higher resolution and doubled smoothness is therefore an extremely sensible compromise.

In summary, although the P7K/P79K may not be the target screen for the most passionate tournament players, for the casual or occasional console user, it offers a package of options that is hard to find among many competitors at this price.

Input lag

10/10

9.9/10

SDR

1080p60
13 ms
15 ms
1080p120
5 ms
10 ms
2160p60
13 ms
14 ms
2160p120
5 ms

HDR

2160p60
13 ms
14 ms
2160p120
5 ms
4320p60

Dolby Vision

2160p60 DV
13 ms
14 ms
2160p120 DV
5 ms

The input lag of the LG C4 is at an incredibly low level in every scenario. Even the most dedicated gamers will surely appreciate the very low input lag at demanding 4K 120 Hz settings with HDR, which is just 5 ms. It is also worth noting that the lag at the same settings but with Dolby Vision HDR enabled remains unchanged, which is not so obvious with the competition. Therefore, it deserves the highest rating and recommendation.

Complementing this rich package for gamers is a parameter that has a direct impact on comfort and performance in gameplay – input lag. Already in native 60 Hz mode, the television boasts an excellent result of just 15 ms. However, the real magic happens when switching to 120 Hz mode, where the lag drops nearly by half, reaching values below 10 ms. Such responsiveness ensures that every command from the controller is translated to the screen in the blink of an eye, which will be appreciated not only by professionals but by anyone who values smooth and direct interaction with the game.

Compatibility with PC

8.6/10

2/10

Chroma 444 (maximum resolution and refresh rate)
Yes
No
Font clarity
Good
Average
Readability of dark text and shapes
Very Good
Poor
Input lag in PC mode (4K, maximum refresh rate)
5ms
16ms
Matrix subpixel arrangement
RWGB
BGR
Max refresh rate
144Hz
60Hz
G-Sync
Yes
Yes
Review LG OLED C4 Compatibility with PC
Review TCL P7K / P79K Compatibility with PC

LG C4 in combination with a PC performs excellently, thanks to a very low latency of just 13.5 ms, which is practically an instantaneous response between the mouse, eye and screen. A particularly important issue when working on the screen is the readability of text, which in the case of the tested television is very good. However, it is worth noting that to achieve sharp fonts, you need to enable the passthrough option in the settings.

The RWBG pixel arrangement has no significant impact on the display of fonts or letters, which is a considerable advantage over Samsung's QD-OLED panels. Users of both computers equipped with the Windows operating system and macOS will certainly be satisfied with the experience on the screen of the tested television.

We finally come to an area that can undoubtedly be described as the biggest Achilles' heel of the TCL P7K/P79K – its compatibility with PC. It is paradoxical in that, on paper, everything looks promising. The presence of G-Sync and support for high refresh rates at lower resolutions might suggest that it would also be a great monitor. Unfortunately, practice brutally verifies these assumptions. The key issue is the lack of support for full 4:4:4 chroma sampling. In everyday use, this translates to terrible font rendering quality – these, especially the coloured ones, become jagged, surrounded by artefacts, and simply poorly legible. This is not the end of the story, as in PC mode, the problem of aggressive dithering also becomes evident, giving the entire image an artificial, overly digital appearance. The only consolation in this situation is the fact that in games we can take advantage of the additional hertz and G-Sync technology, but these are not advantages that could compensate for the fundamental deficiencies in displaying a static interface. The verdict is therefore clear: while as a screen solely for gaming on PC it might still hold its own, as a monitor for work or browsing the internet, the P7K/P79K simply performs poorly.

Viewing angles

7.5/10

3.2/10

Brightness drop at an angle of 45 degrees
25%
78%

The undeniable advantage of OLED panels is their efficiency in the context of group viewing, that is, from various angles. LG C4 maintains very good contrast, colour saturation, and fidelity. Although this is not the result of organic televisions supported by MLA technology, it cannot be said that anyone who purchased the device was dissatisfied with the results obtained. However, it should be noted that at sharp angles, a slight greenish tint can be observed. This is a characteristic feature of WRGB panels from LG, without the aforementioned microlens technology, and unfortunately, there is nothing that can be done about it.

When it comes to viewing angles, we enter the territory where VA panel technology dictates unavoidable conditions. As expected, this is the weak point of this model. It is enough to move away from the screen axis to observe a gradual degradation of the image: colours begin to fade, contrast noticeably drops, and black loses its depth. In direct comparison with IPS panels, which are renowned for their generosity in this aspect, the VA panel must concede superiority to its competitor. Is there any upside to this? Paradoxically, yes. Poor viewing angles are, after all, the price we consciously pay for the fundamental advantage of this technology – a significantly higher native contrast and deeper blacks when viewed head-on. Thus, it can be said that this is a television that favours viewers sitting in the 'ideal' spot, offering them a maximally vibrant image at the cost of versatility.

TV efficiency during daytime

5.7/10

4.6/10

Matrix coating
Glare
Satin
Reflection suppression
Decent
Decent
Black levels during daytime
Very Good
Good
Review LG OLED C4 TV efficiency during daytime
Review TCL P7K / P79K TV efficiency during daytime
Review LG OLED C4 TV efficiency during daytime
Review TCL P7K / P79K TV efficiency during daytime

Matrix brightness

Average luminance SDR

TCL P7K / P79K: 299 cd/m2

LG OLED C4: 367 cd/m2

The maximum brightness of the television in SDR materials is 367 nits. For an OLED television, this is a very good result that allows for quite comfortable viewing during the day. It is worth noting two things. Thanks to the glossy coating of the screen, reflections are held well in place and do not spill over onto the rest of the display. The second issue is the brightness of the screen at 100% white fill, which hovers around 220 nits, a remarkable result, as until recently OLED televisions in this range could only "boast" of brightness that was half as much. This means that conditions for watching, for example, winter sports will be very good.

The final practical test for any television is its daily performance in daytime conditions when it has to compete with ambient light. In this competition, the TCL P7K / P79K starts with a certain advantage in the form of a satin finish on the screen. Its structure handles direct reflections quite decently, diffusing them and protecting the image from excessive fading of colours or lightening of blacks. However, the passive struggle against reflections is one side of the coin. The other is the active ability to 'break through' bright surroundings, and here one of the model's key limitations comes to light. The previously mentioned peak brightness of around 300 nits is simply too low to ensure a fully comfortable and dynamic viewing experience in a brightly lit living room. In such conditions, the image may lack punch, and scenes with lower brightness can lose their clarity.

Details about the matrix

Backlight Type
PFS LED
Software version during testing
03.11.05
V8-0008T01-LF1V441
Image processor
RTD6748 2GB RAM

Subpixel Structure:

Panel uniformity and thermal imaging:

Review LG OLED C4 TV details about the matrix
Review TCL P7K / P79K TV details about the matrix

LG OLED C4

TCL P7K / P79K

TV features

8.9/10

7/10

  • HDMI inputs
    0 x HDMI 2.0, 4 x HDMI 2.1 48Gbps
    0 x HDMI 2.0, 3 x HDMI 2.1 48Gbps
  • Other inputs
    Toslink (Optical audio)
  • Outputs
    Toslink (Optical audio), eARC (HDMI), ARC (HDMI)
    Toslink (Optical audio), eARC (HDMI), ARC (HDMI)
  • Network Interfaces
    Wi-Fi 2.4GHz, Wi-Fi 5GHz, Ethernet (LAN) 100Mbps
    Wi-Fi 2.4GHz, Wi-Fi 5GHz, Ethernet (LAN) 100Mbps
  • TV reception
    DVB-T, DVB-T2, DVB-S, DVB-S2, DVB-C
    DVB-T, DVB-T2, DVB-S, DVB-S2, DVB-C

Classic features:

  • Recording to USB (terrestrial TV)
    Yes
    No
  • Recording programming
    Yes
    No
  • Picture in Picture (PiP)
    No
    No
  • RF remote control (no need to aim at the screen)
    Yes
    Yes
  • Backlit remote control
    No
    No
  • Teletext
    Yes
    Yes
  • Audio only mode
    Yes
    Yes
  • Bluetooth headphones support
    Yes
    Yes
  • Simultaneous Bluetooth headphones & TV audio
    Yes
    Yes

Smart features:

  • AirPlay
    Yes
    Yes
  • Screen mirroring (Windows Miracast)
    Yes
    Yes
  • Voice search
    Yes
    Yes
  • Voice search in native language
    Yes
    Yes
  • Ability to connect a keyboard and mouse
    Yes
    Yes
Review LG OLED C4 TV features
Review LG OLED C4 TV features
Review LG OLED C4 TV features
Review LG OLED C4 TV features
Review TCL P7K / P79K TV features
Review TCL P7K / P79K TV features
Review TCL P7K / P79K TV features
Review TCL P7K / P79K TV features
Review TCL P7K / P79K TV features
Review TCL P7K / P79K TV features
Review TCL P7K / P79K TV features
Review TCL P7K / P79K TV features

LG uses the well-known proprietary WebOS system that has been around for many years. The system offers practically all the most important applications, and the few that are missing can be counted on one hand, such as CDA or KODI. It is also worth mentioning that the modern web browser and the remote control with a built-in mouse allow for convenient use of streaming services in this way, if there is no built-in application.

WebOS also features a highly valued ability to perform operations with a cursor that appears when the remote control is in motion. The convenience of such a function is invaluable when typing in queries or passwords for portals. WebOS, like most systems, also supports features such as screen mirroring, AirPlay, voice search in Polish, and the ability to connect headphones via Bluetooth. On more practical matters, WebOS allows simultaneous use of headphones and the TV speaker, which will certainly be a big help for people with hearing impairments. Among the more interesting features, particularly appreciated by sports fans, is the option to turn on an alert notifying about an upcoming match, ensuring that we never miss a broadcast. The home panel is also praiseworthy, allowing for the control of all smart devices connected to the home network. For example, the cycle of completed laundry will be signalled by a notification in the upper right corner.

In summary, the WebOS system, although less known and having certain limitations compared to Android TV, offers stable and fast performance and supports most features that users may need. It is a solid solution for those looking for a simple and effective operating system in their television.

Smart Features – the Power of Google TV

The heart and operating brain of the TCL P7K / P79K is the Google TV system, which is a significant advantage in itself. This platform opens access to an almost limitless library of applications from the Play Store, ensuring that we won't miss any key streaming service. Integration with other devices is exemplary – Apple users will appreciate the seamless collaboration thanks to AirPlay, and Windows and Android users can easily utilise screen mirroring features. One should also highlight Google Assistant, which performs exceptionally well with voice search in Polish, remaining one of the most effective and convenient solutions of its kind on the market. The system’s performance on the tested model can be described as "above average." The interface is mostly smooth, but during tests, there were occasional slowdowns and even sporadic "freezes" that required a moment of patience. Minor glitches can also be seen in the translation of some system messages, which can be clumsy – however, these are minor oversights on TCL's part that do not affect overall functionality.

Classic Features

In the era of smart systems, traditional television functions often take a back seat, and this is also the case here. A significant advantage is the inclusion of a classic remote control with a numeric keypad, which does not require precise aiming at the screen for communication, significantly enhancing user comfort. The presence of Bluetooth technology for connecting external devices, such as headphones or speakers, should also be regarded positively. However, this is essentially where the list of conveniences ends. It is evident that TCL has almost put everything on the Google TV card, treating classic functions as an absolute minimum. Therefore, we will not find options to record programmes from built-in tuners to a USB drive or the once-popular PiP (Picture-in-Picture) feature. This is, therefore, a basic package that simply works but does not offer anything beyond what is essential.

Playing files from USB

9.3/10

7.2/10

Supported photo formats:

JPEG
Yes
Yes
HEIC
Yes
No
PNG
Yes
Yes
GIF
No
Yes
WebP
No
No
TIFF
No
Yes
BMP
No
Yes
SVG
No
No

Maximum photo resolution:

4 Mpix
Yes
Yes
6 Mpix
Yes
Yes
8 Mpix
Yes
Yes
10 Mpix
Yes
No
12 Mpix
Yes
No
16 Mpix
Yes
Yes
20 Mpix
Yes
No
24 Mpix
Yes
No
28 Mpix
Yes
No
32 Mpix
Yes
Yes

The default file player in LG C4 definitely handles all image resolutions well. We can successfully play videos recorded in virtually all the most popular formats, including Dolby Vision. The only codec that the C4 does not support is H.266 VVC, although this is currently rather unused. However, it is a pity that subtitles in .txt format are not supported. Attention should be paid to the supported image formats, of which there are only three: JPEG, PNG, and, importantly for Apple phone users - HEIC. However, the tested television cannot be faulted for lack of diversity in audio files, the playback of which will not be met with a compatibility warning.

The built-in media player in the P7k/P79k model is quite a puzzling case, placing us in a rather unusual situation. On one hand, its engine manages to decode most popular video formats, which is obviously good news. On the other hand, we encountered a surprising and frustrating flaw – the default app has a fundamental issue with correctly displaying Polish diacritical characters in subtitle files. Instead of letters like "ą," "ę," or "ż," empty squares or random, unreadable symbols appeared on the screen. Fortunately, thanks to the flexibility of the Google TV system, this issue can be easily circumvented. Installing an alternative, advanced player, such as the tried and tested VLC or KODI, fully resolves this inconvenience. The situation is particularly odd since we didn't encounter such a flaw in other TCL models we tested previously. We are therefore dealing with an obvious software oversight, which we hope will be fixed in a future update.

Apps

9.1/10

9.6/10

OK
Disney_Plus
OK
Amazon_Prime_Video
OK
Player_TVN
OK
Polsat_Box_Go
OK
Canal_Plus_Online
OK
TVP_VOD
OK
Apple_TV_Plus
OK
SkyShowtime
OK
Rakuten
OK
CDA_Premium_Browser
OK
Spotify
OK
Tidal
OK
Netflix
OK
YouTube
OK
HBO_MAX
No
Kodi
OK
Apple_music
No
Eleven_sports
OK
Xbox Game Pass
OK
GeForce Now!
OK
Amazon Luna
OK
Boosteroid
No
Steam Link
OK
Disney_Plus
OK
Amazon_Prime_Video
OK
Player_TVN
OK
Polsat_Box_Go
OK
Canal_Plus_Online
OK
TVP_VOD
OK
Apple_TV_Plus
OK
SkyShowtime
OK
Rakuten
OK
CDA_Premium_Browser
OK
Spotify
OK
Tidal
OK
Netflix
OK
YouTube
OK
HBO_MAX
OK
Kodi
No
Apple_music
OK
Eleven_sports
No
Xbox Game Pass
OK
GeForce Now!
No
Amazon Luna
OK
Boosteroid
OK
Steam Link

Sound

7.5/10

6.2/10

  • Maximum volume
    -
    -
  • Dolby Digital Plus 7.1
    Yes
    Yes
  • Dolby True HD 7.1
    Yes
    No
  • Dolby Atmos in Dolby Digital Plus (JOC)
    Yes
    Yes
  • Dolby Atmos in Dolby True HD
    Yes
    No
  • DTS:X in DTS-HD MA
    Yes
    Yes
  • DTS-HD Master Audio
    Yes
    Yes

The implemented audio system in LG C4 has been very well tuned, allowing us to experience strong bass, as well as balanced mid and high tones. We can confidently say that in its price range, it is one of the better sounding televisions. However, we believe that those deciding to purchase the C4 will already own a dedicated audio set. The presence of DTS-HD Master Audio and Dolby Atmos codecs will not be without significance.

In terms of the built-in audio system, the TCL P7k/P79k presents a level that can be described as functional and correct, but lacking audiophile ambitions. The speakers play quite loudly, and the dialogues in films and television programmes are delivered clearly and without distortion, which is crucial in everyday use. However, the soundstage definitely lacks a foundation in the form of low tones. This is a direct consequence of the absence of a dedicated subwoofer – an element that in the higher P8K series, represented by a large Onkyo subwoofer at the back of the cabinet, constituted the strength of its sound. Here, that element is simply missing, which makes the sound seem flatter and devoid of the depth that creates a cinematic atmosphere. We also noticed a peculiar aspect in the software – when attempting to set the maximum volume, the television automatically reduces it. It is difficult to determine definitively whether this is a form of protection against distortion or a minor software glitch; nonetheless, it’s a shame because the power reserves seem to be slightly greater.