Display Apparatus HDR SDR Brightness Correction
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Solution Overview
Problem
Display apparatuses struggle to simultaneously display High Dynamic Range (HDR) and Standard Dynamic Range (SDR) images with favorable brightness levels without increasing costs by significantly altering the emission brightness of the backlight unit.
Innovation Solution
A display apparatus and method that acquire brightness information and correct SDR image data to match the display brightness of HDR images, ensuring HDR images are displayed at appropriate high brightness and SDR images at lower brightness levels, using a simple configuration that does not require significant changes in backlight emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the emission brightness of the backlight unit is increased to display HDR images with high brightness, then HDR image display quality is improved, but SDR images are displayed with excessively high brightness
Solution Approach 1:
The display screen is divided into multiple blocks, and each block is independently processed to apply appropriate brightness correction. The correcting unit divides the screen into a plurality of blocks and applies different correction data to each block, enabling HDR and SDR images to be displayed with appropriate brightness in their respective display areas.
Solution Approach 2:
Different brightness correction strategies are applied to different regions of the screen based on the image type (HDR or SDR). The correcting unit generates correction data specifically tailored for each block's content, ensuring that HDR images receive high brightness correction while SDR images receive reduced brightness correction.
2Illumination intensity
If the emission brightness of the backlight unit is decreased to display SDR images with appropriate brightness, then SDR image display quality is improved, but HDR images are displayed with insufficient brightness
Solution Approach 1:
The display screen is divided into multiple blocks, and each block is independently processed to apply appropriate brightness correction. The correcting unit divides the screen into a plurality of blocks and applies different correction data to each block, enabling HDR and SDR images to be displayed with appropriate brightness in their respective display areas.
Solution Approach 2:
Different brightness correction strategies are applied to different regions of the screen based on the image type (HDR or SDR). The correcting unit generates correction data specifically tailored for each block's content, ensuring that HDR images receive high brightness correction while SDR images receive reduced brightness correction.
3Illumination intensity
If a configuration is adopted to enable partial emission brightness control of the backlight unit, then simultaneous display of HDR and SDR images with favorable brightness is achieved, but manufacturing cost significantly increases
Solution Approach 1:
The patent replaces the mechanical/optical approach of partially controlling backlight emission with an image processing approach. Instead of modifying the backlight unit's physical emission characteristics, the system processes image data to generate correction data that compensates for brightness differences, achieving the desired effect through software rather than hardware modification.
Solution Approach 2:
The patent changes the brightness parameters of image data through digital processing rather than physically adjusting backlight emission. The correcting unit modifies the image data parameters (brightness, contrast) to achieve favorable display appearance without requiring complex backlight control mechanisms.
4Stability of the object's composition
If image data correction techniques are applied to reduce brightness unevenness, then display uniformity is improved, but the ability to display HDR and SDR images with favorable respective brightness is not achieved
Solution Approach 1:
Different brightness correction strategies are applied to different regions of the screen based on the image type (HDR or SDR). The correcting unit generates correction data specifically tailored for each block's content, ensuring that HDR images receive high brightness correction while SDR images receive reduced brightness correction.
Solution Approach 2:
The patent changes the brightness parameters of image data through digital processing rather than physically adjusting backlight emission. The correcting unit modifies the image data parameters (brightness, contrast) to achieve favorable display appearance without requiring complex backlight control mechanisms.
Data Source
AI summary
A display apparatus includes: a display unit; an acquiring unit configured to acquire brightness information that is information related to display brightness; and a correcting unit configured to, in a case where a first image that is an image based on first image data having a first dynamic range and a second image that is an image based on second image data having a second dynamic range narrower than the first dynamic range are displayed on a screen, correct the second image data so that the first image is displayed in accordance with the display brightness related to the brightness information and the second image is displayed in accordance with display brightness that is lower than the display brightness related to the brightness information.