Display Driving Method for Brightness Control via Regional Segmentation
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Solution Overview
Problem
Liquid crystal display apparatuses struggle to display strikingly bright regions as brightly as cathode-ray tubes, leading to less clear, less realistic, and less appealing images due to inefficiencies in light transmission and the use of color filters.
Innovation Solution
A method and device for driving a display apparatus that divides the screen into small regions, evaluates relative brightness, and adjusts gradation luminance characteristics to enhance the brightness of strikingly bright regions, using a combination of R, G, B, and W sub-pixels and controlling the luminance of specific sub-pixels to achieve higher contrast and clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a liquid crystal display apparatus uses color filters and adjusts light transmission to display colors, then color display is achieved, but light transmission efficiency deteriorates and brightness of strikingly bright regions is insufficient
Solution Approach 1:
The display screen is divided into multiple small regions, and each region is independently controlled with different gradation luminance characteristics. This segmentation allows bright regions to be enhanced without compromising the overall light efficiency of the entire display.
Solution Approach 2:
Different gradation luminance characteristics are applied to different regions of the display. Specifically, strikingly bright regions are assigned higher white luminance characteristics while other regions use lower white luminance characteristics, optimizing both brightness where needed and energy efficiency elsewhere.
2Illumination intensity
If the white luminance of all regions is increased to achieve brighter display, then brightness is improved, but power consumption increases and contrast with darker regions is reduced
Solution Approach 1:
The patent applies different white luminance characteristics to different regions based on their display requirements. Only regions that need to be strikingly bright use high white luminance characteristics, while other regions use low white luminance characteristics, thereby reducing overall power consumption while maintaining necessary brightness.
Solution Approach 2:
The gradation luminance characteristics are dynamically adjusted based on the input signal and display requirements. The system determines which regions should have high white luminance and which should have low white luminance, allowing flexible adaptation to different display scenarios.
3Manufacturing precision
If conventional display methods are used without regional differentiation, then device complexity is low, but image clarity and realism are insufficient
Solution Approach 1:
The display is segmented into multiple small regions, each capable of independent luminance control. This segmentation enables precise control over image clarity and realism by allowing different regions to have optimized luminance characteristics.
Solution Approach 2:
The patent changes the luminance parameter (white luminance characteristic) based on regional requirements. By adjusting this parameter differently across regions, the system achieves superior image clarity and realism while managing complexity through systematic parameter control.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method allows for a clearer, more realistic, and more appealing image display by enhancing the brightness of strikingly bright regions, improving contrast ratio, and maintaining image quality across various types of images.
Implementation Method 1
the transmission of light emitted from a backlight is adjusted by adjusting the way a liquid crystal layer polarizes light
Data Source
AI summary
A control section divides a display screen into small regions, evaluates the relative brightness of each of the small regions in accordance with color data to be inputted as color data by which each pixel is displayed, and determines whether or not the display screen has a first small region that is brighter than the other small regions by a predetermined degree. Furthermore, the control section causes a first generating means to generate gradation data for use in the first small region, and causes a second generating means to generate gradation data for use in the other small regions. Even if the second generating section receives the same color data as the first generating section does, the second generating section limits the luminance of a W sub-pixel as compared to the first generating section. With this, the first small region can be displayed more strikingly brightly, so that a clearer, more realistic, and more appealing image can be displayed. This makes it possible to realize a display apparatus capable of displaying a clearer, more realistic, and more appealing image.