Display Luminance Circuit for Irregular LED Local Dimming
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Solution Overview
Problem
Existing display technologies are limited in their ability to accurately calculate backlight luminance when light source elements are arranged in non-matrix forms, leading to inefficiencies in local dimming control.
Innovation Solution
A circuit device that computes lighting luminance information by incorporating both actual and virtual light source positions within a computing grid, enabling luminance calculation regardless of the specific arrangement of light source elements, and performs color correction based on this information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a specific matrix arrangement of LEDs is assumed for local dimming calculation, then the luminance calculation can be performed using a fixed algorithm, but the system cannot accommodate alternative LED arrangements
Solution Approach 1:
The patent creates a universal luminance calculation algorithm that can handle multiple LED arrangement types (matrix, linear, irregular patterns) through a single unified approach. The computing grid serves as a universal framework that adapts to different physical LED configurations, allowing the same calculation methodology to work across various arrangement scenarios without requiring separate algorithms for each case.
Solution Approach 2:
The patent changes the computational parameters by introducing virtual light source positions and computing grids that are independent of actual LED arrangements. By transforming the problem from directly calculating based on physical LED positions to calculating based on grid positions with virtual sources, the system can accommodate any LED arrangement pattern while maintaining a consistent calculation approach.
2Productivity
If virtual light source positions are disabled in the computing grid, then computational load is reduced, but the system must accurately identify which positions correspond to actual LEDs
Solution Approach 1:
The patent performs preliminary identification and mapping of actual LED positions to computing grid positions before the luminance calculation process. By pre-establishing which grid positions correspond to actual LEDs and which are virtual, the system prepares the computational framework in advance, allowing the main calculation to proceed efficiently without needing to repeatedly determine LED positions during processing.
Solution Approach 2:
The computing grid acts as an intermediary layer between the physical LED arrangement and the luminance calculation process. This intermediate structure allows the system to work with standardized grid positions while indirectly representing the actual LED configurations, simplifying the calculation process while maintaining accuracy through the grid's structured approach.
Data Source
AI summary
A circuit device includes a luminance processing circuit and a color correction circuit. The luminance processing circuit computes lighting luminance information indicating luminance at which a target pixel of a display panel is illuminated by a plurality of light source elements, based on light source luminance information indicating luminance of light emitted by each of the plurality of light source elements and attenuation rate distribution information indicating an attenuation rate distribution of light with respect to a distance between each of the light source elements and each of pixels. The color correction circuit performs color correction on input image data based on the lighting luminance information. The luminance processing circuit computes the lighting luminance information by disabling light source luminance information of virtual light source positions where the plurality of light source elements are not arranged in a computing grid used for computation of the lighting luminance information.