Backlight Dimming Circuit With Area Boosting for Halo Control
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Solution Overview
Problem
Existing image display devices face poor display quality in areas other than the primary display area due to inadequate light source luminance adjustment, leading to suboptimal visibility and image rendering.
Innovation Solution
A circuit device with a luminance analysis circuit, dimming circuit, and area boosting circuit that analyzes image data to adjust light source luminance and perform area boosting, ensuring higher luminance in specific areas and appropriate dimming in others based on image data, enhancing display quality and visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the luminance of the light source in light emitting area other than the first light emitting area is controlled to be lower than the luminance of the first light emitting area, then the visibility of the first display area is improved, but the display quality in other areas deteriorates because the luminance cannot be adjusted appropriately for different display images
Solution Approach 1:
The patent applies dynamics by making the luminance control adaptive and changeable based on display conditions. The display control unit dynamically adjusts the luminance of light source elements in different light emitting areas according to the display image content, time period, and display mode, transforming the static luminance control into a dynamic system that can adapt to various scenarios.
Solution Approach 2:
The patent implements parameter changes by varying the luminance parameters of light source elements based on different conditions. The display control unit changes the luminance parameters dynamically according to the display image luminance characteristics, time period (e.g., daytime/nighttime), and display mode (e.g., game mode, video mode), enabling flexible adaptation to different display requirements.
2Device complexity
If the luminance of light source elements in all areas is uniformly controlled, then the manufacturing and control complexity is reduced, but the visibility and display quality in specific important areas deteriorates
Solution Approach 1:
The patent applies segmentation by dividing the backlight unit into multiple independent light emitting areas, each controlled by separate light source elements. This allows different luminance levels to be applied to different regions of the display, with the first light emitting area corresponding to the first display area being controllable at higher luminance levels than other areas, thereby enhancing visibility in specific important areas without requiring complete uniform control.
Solution Approach 2:
The patent implements local quality by providing different luminance characteristics to different regions of the display. The display control unit selectively adjusts the luminance of light source elements in specific light emitting areas based on the display image content, ensuring that important areas receive appropriate illumination enhancement while other areas maintain normal or reduced luminance, thus optimizing overall display quality without uniform control.
3Illumination intensity
If the luminance of light source elements is increased to improve visibility, then the visibility of display images is enhanced, but energy consumption increases
Solution Approach 1:
The patent applies local quality by providing enhanced luminance only to specific light emitting areas where it is most needed for visibility, rather than uniformly increasing luminance across the entire display. The display control unit selectively controls the luminance of light source elements in different light emitting areas based on the display image content, time period, and display mode, thereby improving visibility in critical areas while minimizing energy consumption in other areas.
Solution Approach 2:
The patent implements partial action by applying luminance enhancement only to specific light emitting areas corresponding to important display regions, rather than uniformly enhancing all areas. This allows the system to achieve sufficient visibility for critical information while avoiding the excessive energy consumption that would result from uniformly increasing the luminance of all light source elements across the entire display.
Data Source
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AI summary
A circuit device includes a luminance analysis circuit, a dimming circuit, and an area boosting circuit. The luminance analysis circuit luminance analyzes image data of an input image to output luminance information. The dimming circuit determines light source luminance information indicating light emission luminance at which each light source element of the plurality of light source elements emits light in accordance with the luminance information. The area boosting circuit performs an area boosting process on the dimming circuit. The area boosting process is a process in which the light emission luminance of the light source element corresponding to a first area is higher when the area boosting process is performed on the first area of the input image than when the area boosting process is not performed on the first area.