•   Overview
•   Advantage of LG OLED77ZXPUA
•   Advantage of Sony KD-77AG9
•   Common Strengths and Weaknesses
•   Selected Features
•   Specifications

Here we are comparing LG OLED77ZXPUA to Sony KD-77AG9 to reveal their common strengths and weaknesses as well as the differences between them which will help you in making a correct decision before the purchase. The LG OLED77ZXPUA has 8K UHD (7680 x 4320) and the Sony KD-77AG9 has 4K UHD (3840 x 2160) resolution and they both support HDR.

We have evaluated the TVs from available features and specifications. LG OLED77ZXPUA gets higher overall score in our ranking system which is based on the display specifications, video, audio and other features, connectivity and format support.

This section shows the features and specifications which are the reason to choose LG OLED77ZXPUA over Sony KD-77AG9.

This section shows the features and specifications which are the reason to choose Sony KD-77AG9 over LG OLED77ZXPUA.

OLED displays

LG OLED77ZXPUA and Sony KD-77AG9 have organic light-emitting diode (OLED) displays. This is a self-emissive display which can completely turn off individual pixels leading to the ideal black levels and better contrast during HDR compared to any LCD displays. This makes them to be the best choice for dark rooms. OLED enables a simpler internal structure than conventional displays. With just a few layers, OLED TVs are very lightweight and thin. OLED displays also have better viewing angles. However, they are not able to achieve such high brightness as modern LCD displays which makes them less suitable in bright rooms.

HDR10

LG OLED77ZXPUA and Sony KD-77AG9 support HDR10 which was announced on August 27, 2015, by the Consumer Technology Association and uses the wide-gamut Rec. 2020 color space. It is not backward compatible with SDR. It sends static metadata via video stream to the TV which calibrates its screen brightness and color according to that. HDR10 is technically limited to a maximum of 10,000 nits of brightness and uses 10-bit color which corresponds to 1024 shades of the primary RGB colors.

Dolby Vision

LG OLED77ZXPUA and Sony KD-77AG9 also support Dolby Vision which is an update to HDR10 by adding dynamic metadata that can be used to more accurately adjust brightness levels up to 10,000 nits on a scene-by-scene or frame-by-frame basis and supports up to 12-bit color depth (4096 shades of RGB) and 8K resolution.

And in the end we display all the specifications which are present for both models.

Note: The following table shows only those details which are applicable for both models and excludes the ones that are applicable for only one model. If you want to see a full list of specs for each model please visit their individual pages here - LG OLED77ZXPUA and here - Sony KD-77AG9.