Backlight Region Segmentation for LCD Brightness Optimization
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Solution Overview
Problem
Liquid crystal display (LCD) apparatuses suffer from insufficient brightness due to significant optical loss as light from the backlight module penetrates through multiple optical films and a liquid crystal layer, and conventional solutions like adding a white-light filter unit reduce brightness when displaying monochromatic colors.
Innovation Solution
The LCD apparatus is designed with a backlight module divided into individually drivable regions with multiple light-emitting units for different colors, each corresponding to display blocks with specific filter units, and a power regulating module that adjusts light-emitting intensities based on image data to optimize light transmission through multiple filter units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a white-light filter unit is added to the tricolor filter unit in each pixel, then the light output amount of the white backlight is increased and the pixel brightness is increased, but when the displayed light is close to monochromatic light, the brightness of the pixel is inversely lower than that utilizing the conventional method
Solution Approach 1:
The backlight module is divided into multiple independently controllable backlight regions, each corresponding to a display block. This segmentation allows different regions to be controlled independently based on the image data, enabling optimized light emission for different color requirements without adding complex filter units to each pixel.
Solution Approach 2:
The patent changes the control parameter from individual pixel filter unit configuration to backlight region level control. By controlling the light-emitting intensity of each backlight region based on image frame data, the system achieves brightness optimization without the need for additional filter units, thereby maintaining stability across different color displays.
2Quantity of substance
If the area of the monochromatic filter unit is reduced to increase white backlight emission, then the light output amount is increased, but the brightness of the pixel when displaying monochromatic light is inversely lower
Solution Approach 1:
The backlight module is segmented into multiple independently controllable regions, each corresponding to a display block. This allows the system to emit light of specific colors from specific regions without requiring reduced filter unit areas, thereby maintaining both light output amount and monochromatic light brightness.
Solution Approach 2:
The patent introduces backlight regions as intermediary elements between the light source and the display blocks. These intermediary regions can be controlled to emit light of different colors and intensities, serving as a mediator that eliminates the need to reduce filter unit areas while maintaining brightness performance.
3Device complexity
If light penetrates through multiple optical films and liquid crystal layer, then the display structure is achieved, but significant optical loss occurs and brightness is insufficient
Solution Approach 1:
The backlight module is divided into multiple independently controllable regions, each corresponding to a display block. This segmentation allows the system to optimize light emission at the region level, compensating for the optical loss incurred while light penetrates through multiple optical films and liquid crystal layers by emitting light only where needed and in the required colors.
Solution Approach 2:
The patent changes the control approach from pixel-level filter unit control to backlight region-level control. By controlling the light-emitting intensity and color of each backlight region based on image data, the system compensates for optical loss in the multi-layer structure without requiring additional light emission components, thereby maintaining brightness while preserving the multi-layer display structure.
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
This configuration enhances display brightness and stabilizes brightness variation, reducing power consumption while maintaining high brightness levels, especially when displaying monochromatic colors.
Implementation Method 1
Each backlight regions has multiple light-emitting units for emitting light in different colors
Implementation Method 2
Each of the pixels has multiple filter units. A transmitted spectrum of each of the light-emitting units of the backlight regions corresponds to transmitted spectrums of at least two filter units of each of the pixels
Data Source
AI summary
A liquid crystal display (LCD) apparatus includes a backlight module and a LCD module. The backlight module has a plurality of individually drivable backlight regions. The LCD module has a plurality of display blocks, each of which corresponds to one of the backlight regions and is disposed on an optical path of light emitted from the corresponding backlight regions. A power regulating module is electrically connected to the backlight module and the LCD module for receiving image frame data and controlling light-emitting intensities of the backlight regions in accordance with the image frame data to be displayed by the corresponding display blocks. Each backlight regions has multiple light-emitting units for emitting light in different colors. Each display block has a plurality of pixels, and each of the pixels has multiple filter units. A transmitted spectrum of each of the light-emitting units of the backlight regions corresponds to transmitted spectrums of at least two filter units of each of the pixels in the respective display blocks.