LG OLED C4 vs LG QNED87T6B

The HDR performance of the LG OLED C4 is impressive, firmly placing it in the higher tier. Most films exceed 700 nits, delivering a highly realistic image. While none surpass the 1,000-nit mark, the combination of these results with the TV’s infinite contrast and perfect blacks significantly enhances the visual experience. The final scene, with a full-screen flash of sunlight, is slightly less bright than the others but still maintains a solid level of brightness. Another highlight is the excellent DCI-P3 colour gamut coverage, which ensures incredibly vibrant colours. The HDR technology in the LG OLED C4 delivers exceptional colour and detail reproduction. The dynamic tone mapping feature optimises brightness levels, ensuring ideal light reproduction in every scene, even in the most demanding high-dynamic films.

The QNED87T6B provides a solid HDR performance, delivering an impressive visual experience in many aspects. With a brightness approaching 500 nits, it offers good visibility of fine details in high-dynamic scenes. Support for HDR10 and HLG ensures the content appears well on the screen, though the absence of more advanced formats like Dolby Vision or HDR10+ limits the potential for optimal brightness and detail in certain scenes. Without dynamic metadata, the TV may struggle to reproduce fine details in very bright areas, where these advanced standards would typically make a difference. However, its excellent coverage of the DCI-P3 colour gamut (96.4%) provides vibrant, natural colours, enhancing the overall visual quality of 4K content.

The best factory mode on the tested television was "Filmmaker," which served as the basis for all evaluations. In terms of colour reproduction, this mode performed reasonably well; however, certain flaws significantly detracted from the overall viewing experience. The most fundamental issue was the white balance, which exhibited a noticeable dominance of red, skewing the image characteristics. This resulted in a pronounced yellow tint to whites and a general shift of all colours towards warmer tones.

The gamma, an equally crucial—if not more important—aspect, was notably lowered, leading to a marked reduction in contrast. Additionally, the television frequently lost detail at the start of the gamma curve. These issues were most apparent in SDR content.

When examining HDR materials, the same yellowing effect in the white balance was observed, as seen with SDR content. However, the EOTF curve, which replaces the gamma curve for HDR, was near perfect and left little room for criticism.

The LG QNED87T6B, even in its best factory setting, Filmmaker Mode, exhibits issues with colour reproduction. A significant problem is the white balance, where the blue colour tends to drop on the graph, causing a shift towards yellow. This results in a warmer hue than intended, which affects the naturalness of color reproduction, especially in scenes with white or neutral backgrounds. The Colour Checker test confirmed that certain colours are distorted and do not accurately reflect reality, which can make movie scenes seem less lifelike and distort details.

In terms of contrast, there are notable issues with the gamma graph, showing significant drops where the optimal value should be around 2.4. This results in the TV displaying darker areas brighter in some scenes, which reduces depth and dynamic range. Additionally, the EOTF (Electro-Optical Transfer Function) curve, which corresponds to brightness reproduction, shows an unnatural drop at the start, leading to lower accuracy in dark scenes. This diminishes the TV's ability to convey full black depth, causing details in darker areas to be lost. As a result, more demanding scenes may appear less realistic, with a noticeable loss of detail in shadows and dark areas.

As mentioned, LG televisions come with advanced tools to facilitate an accurate calibration process. By utilising these tools, we meticulously adjusted the image to align with the director’s original vision. Without overstating, the results were outstanding. Both SDR and HDR content now achieve a level of visual fidelity that reflects how films are intended to be seen.

Examining the colour accuracy on the "ColourChecker" palette reveals impressive results, with almost all colour errors falling below a delta of "1," aside from two minor exceptions. Post-calibration, the LG OLED C4 demonstrated a marked improvement in colour reproduction, particularly in SDR and HDR modes. Testing the TV after calibration highlighted its capacity for delivering exceptionally accurate colours, underlining the high calibre of this model. The LG C41LA offers a stunningly precise colour palette, sure to satisfy even the most discerning viewers.

After calibration, the LG QNED87T6B delivers impressive results with SDR content. The white balance has been improved, resulting in natural, harmonious tones across various scenes. The precise gamma tuning allows for accurate reproduction of details in both dark and bright areas, making the TV perform excellently in everyday use. The overall image is vivid and well-balanced, with solid colour quality in HD. The contrast has also improved, with the gamma chart showing fewer significant errors, providing a more refined viewing experience.

In 4K HDR, the white balance continues to perform well, though some errors remain at the end of the chart. These might be linked to the TV's aggressive local dimming, which can affect colour accuracy in certain scenes. While the TV does not fully improve brightness as indicated by the EOTF curve, its inherent construction limitations prevent it from achieving perfection in this area. The Colour Checker test highlights an issue with colour saturation, as the TV, despite offering a wide colour gamut, cannot fully capture what the director intended.

Nevertheless, the overall picture quality after calibration is considerably better than before. The improvements in white balance and gamma tuning result in more vivid and realistic colours, enhancing the viewing experience despite the remaining shortcomings.

Let us revisit the function responsible for smooth gradation and consider its role in improving lower-quality materials. The default smoothing of tonal transitions, while decent, can be further enhanced. The feature includes a slider for adjusting its strength, and we recommend selecting the first option. This setting strikes a balance, offering excellent results without compromising important details through unnecessary blurring.

The image scaling on the LG C4 is commendable, though not entirely without flaws. By default, the image appears slightly sharper, though not to an intrusive degree. While jagged edges on elements like trees are occasionally visible, this issue is relatively minor compared to similar offerings from other manufacturers.

When it comes to lower-quality content, the LG QNED87T6B performs admirably, with smooth gradation effectively addressing problematic areas in the image without negatively impacting the film grain. For optimal results, setting the "Smooth Gradation" feature to a low level delivers the best effect, significantly enhancing the viewing experience of lower-resolution materials by making them smoother and more visually appealing.

The TV handles digital processing well, ensuring the image is displayed without overscan or clipping. While slight jaggedness may be noticeable on certain fine details, such as branches against a background, the overall presentation remains impressive. Users will be satisfied with the quality of the image when watching lower-quality content, such as standard television, as the TV does an excellent job of enhancing the visual experience.

The LG G4 supports a maximum refresh rate of 144 Hz, achievable only when connected to a high-performance PC. Otherwise, the television operates at a maximum of 120 Hz, the recommended setting for viewing sports or content with fast-paced motion. For those prioritising smooth image quality, LG has included a versatile motion smoothing feature called "TrueMotion." This function is split into two adjustable sliders: De-Blur, which sharpens moving images, and De-Judder, which reduces jitter. Both sliders offer a range of settings from 0 to 10, enabling users to fine-tune the motion smoothness to their preference.

The LG OLED C4 boasts an impressive average response time of less than 1 millisecond, as confirmed by our measurements. This results in exceptional image clarity, far surpassing LCD televisions, which often have response times of several milliseconds. This clarity is evident in tests like the "UFO Test," where no trailing blur is visible behind moving objects.

The LG QNED87T6B delivers decent motion smoothness, particularly with the "TruMotion" feature, which allows users to adjust motion smoothing on a scale from 0 to 10. The "De-Judder" setting helps regulate the smoothness of motion, while the "De-Blur" option enhances motion sharpness. This provides flexibility for users to choose between a more traditional cinematic effect with slight judder (lower settings) and a smoother, more theatrical image, which, while slightly deviating from the cinematic standard, can be appealing to many viewers.

For gamers and sports fans, the 120Hz panel ensures an immersive experience, while the IPS technology offers better response times compared to comparable VA panels at a similar price. This results in smoother gameplay and more dynamic viewing of fast-paced sports events, making the QNED87T6B an excellent choice for those seeking high-quality motion performance.

The LG C4, like nearly all OLED televisions from the manufacturer, excels in its compatibility with consoles and PCs. With the inclusion of four full-bandwidth HDMI 2.1 ports supporting 48 Gbps, the TV incorporates a range of features to enhance the gaming experience. Notably, it offers simultaneous support for FreeSync and G-Sync, making it an ideal choice for gamers using AMD or Nvidia graphics cards. For those seeking the best possible gaming quality, the integration of HDR Dolby Vision and HGIG mode is particularly impressive. HDR Dolby Vision operates with remarkably low input lag across all settings, ensuring smooth and responsive gameplay.

A standout feature in LG's televisions is the GameBar, which allows users to adjust settings in real-time without leaving the game. This includes options for customising the image for viewers with visual impairments, a thoughtful addition. Additionally, enabling VRR (Variable Refresh Rate) does not result in a loss of contrast—a benefit of the OLED panel's self-emissive technology, eliminating the need for conventional backlighting. While some slight flickering of grey tones may occur, this is a characteristic of VRR technology across all manufacturers.

In summary: The LG C4, like the brand's other OLED models equipped with high-refresh-rate panels and HDMI 2.1, provides a seamless and immersive gaming experience. For gamers demanding top-tier performance, this TV is an outstanding choice.

The LG QNED87T6B is a top-tier choice for gamers seeking high-performance features. It is equipped with four HDMI 2.1 ports, allowing seamless connection to the latest consoles like the PlayStation 5 and Xbox Series X. This ensures full functionality, including support for Variable Refresh Rate (VRR) and Auto Low Latency Mode (ALLM), which provide a smoother and more responsive gaming experience. The Game Bar feature enables easy management of gaming settings, allowing users to adjust VRR, ALLM, Multi View, and monitor the frame rate without navigating complex menus.

Additionally, the TV supports G-Sync and FreeSync, which are crucial for gamers using Nvidia and AMD graphics cards. These technologies synchronize the TV's refresh rate with the graphics card, reducing screen tearing and stuttering. With a 120Hz panel, the LG QNED87 delivers exceptional motion smoothness and image clarity, while the Black Frame Insertion (BFI) feature, available at 60Hz and 120Hz, further enhances visual fluidity. Overall, the LG QNED87T6B meets the demands of even the most discerning gamers, offering a comprehensive range of features that elevate the gaming experience.