Multi-Area Display Brightness Control for Contrast Without Power Rise
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Solution Overview
Problem
Existing display systems with multiple display sections struggle to implement an auto brightness level (ABL) function without increasing power consumption, as calculating average luminance values across all sections is challenging.
Innovation Solution
A display control device that calculates a target average luminance value for one area, receives non-target average values from other areas, and adjusts overall luminance values to improve contrast without increasing power consumption, using a master controller and slave controllers to coordinate display control across multiple areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple display control devices control display in respective areas, then display coverage is improved, but implementing ABL function becomes difficult
Solution Approach 1:
The patent divides the image into multiple areas, with each display control device responsible for a specific area. Each device calculates luminance statistics for its own area (local segmentation), while a master device aggregates these to compute the overall average luminance for ABL control. This segmentation allows distributed control while maintaining system-wide ABL functionality.
Solution Approach 2:
The patent introduces a master display control device that acts as an intermediary between individual display control devices and the ABL function. The master device receives luminance statistics from slave devices, calculates the overall average luminance, and distributes ABL control signals back to all devices. This intermediary structure enables centralized ABL coordination without requiring each device to independently calculate global statistics.
2Illumination intensity
If average luminance is calculated for entire image, then contrast is improved, but power consumption increases
Solution Approach 1:
The patent implements partial action by having each display control device calculate luminance statistics only for its own display area rather than processing the entire image. This reduces the computational load and power consumption for each device while still enabling global ABL control through aggregation of partial results at the master device level.
3Ease of operation
If each display section calculates average luminance independently, then processing is simplified, but image quality deteriorates
Solution Approach 1:
The patent merges the luminance statistics calculated by individual display control devices at the master device level. Each slave device independently calculates luminance data for its area (maintaining processing simplicity), then transmits these results to the master device which combines them to determine the overall average luminance for accurate ABL control (maintaining image quality).
Data Source
AI summary
The present technology relates to a display control device and a display device that make it possible to improve contrast of a display image without increasing a total power consumption due to display in a case where an image is divided into a plurality of areas and a plurality of display control devices controls display of the image in respective areas.In a case where the image is divided into the plurality of areas and each of a master controller and a slave controller controls the display of the image in respective areas, a target average value calculation unit sets the image in one of the plurality of areas as a display control target and calculates a target average value that is an average value of luminance of the display control target. A data communication unit receives, from the slave controller, a non-target average value that is an average value of luminance for each area of an image other than the display control target in the image. An overall average value calculation unit calculates an overall average value that is an average value of luminance of a whole of the image on the basis of the target average value and the non-target average value. The present technology is applicable to, for example, a display system and the like.