Display Device Regional Dimming for Smooth Brightness Transitions
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Solution Overview
Problem
Liquid crystal displays face challenges in achieving smooth transitions between bright and dark areas due to size limitations of light sources in backlight devices, limiting their display contrast and effectiveness, especially when displaying high-resolution images.
Innovation Solution
A display device with a backlight unit and a first display structure above its light-emitting surface, and a second display structure on the side, featuring pixels divided into dimming areas that adjust transmittance based on the image to be displayed, allowing for regional dimming and improved contrast.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a backlight device with a light source substrate is used to improve display contrast, then display contrast is improved, but the transition between bright and dark areas becomes rough due to size limitations of light sources
Solution Approach 1:
The patent divides the display area into multiple dimming areas, with each area independently controllable through separate light source groups. This segmentation allows precise control of brightness in different regions, enabling smooth transitions between bright and dark areas while maintaining high contrast. The light source substrate is divided into multiple light source groups corresponding to different dimming areas, each with independent dimming control.
Solution Approach 2:
The patent implements regional dimming by assigning different dimming characteristics to different areas of the display. Each dimming area can be independently adjusted to achieve optimal contrast and smoothness locally. This local quality approach allows the system to optimize brightness distribution in specific regions without affecting the entire display, thereby achieving smooth transitions in critical areas while maintaining high overall contrast.
2Measurement precision
If light sources are made smaller to achieve high-resolution display, then resolution is improved, but the ability to create smooth brightness transitions deteriorates
Solution Approach 1:
The patent segments the light source substrate into multiple light source groups, where each group corresponds to a specific dimming area. This segmentation enables independent control of brightness in different regions, allowing the system to maintain high resolution through small light sources while achieving smooth transitions through coordinated dimming control across multiple groups.
Solution Approach 2:
The patent implements dynamic dimming control where the brightness of each light source group can be independently adjusted in real-time based on the display content. This dynamic control allows the system to adapt brightness levels to create smooth transitions between bright and dark areas, compensating for the limitations of small light source sizes used for high-resolution displays.
Data Source
AI summary
The present disclosure discloses a display device. The display device includes a first display structure, a second display structure and a backlight device. The first display structure includes first pixels arranged in an array, the first pixels are divided into multiple dimming areas, and each dimming area includes at least one first pixel. The first display structure is for adjusting the transmittance of each dimming area for lights emitted by the backlight device according to an image to be displayed in the next frame of the second display structure.