Display Device with Dimming Panel and Optical Separation
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Solution Overview
Problem
Current projection display devices face challenges in adjusting light levels between bright and dark portions of an image, leading to suboptimal display quality due to difficulties in uniformly controlling light across the entire screen.
Innovation Solution
A display device configuration featuring a dimming panel with sub-areas arrayed in a matrix to control light transmittance and a display panel with pixels arrayed in a matrix, where the controller generates control signals to manage transmittance in both panels based on image luminance data, allowing for enhanced contrast by distinguishing between bright and dark areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single liquid crystal panel uniformly adjusts light across the entire screen, then the structure is simple and manufacturing cost is low, but the ability to differentiate between bright and dark portions is poor
Solution Approach 1:
The liquid crystal panel is divided into multiple regions (first region for bright portions, second region for dark portions) that can be independently controlled. This segmentation allows differential light adjustment across different areas of the screen, improving the ability to distinguish between bright and dark portions while maintaining a relatively simple single-panel structure.
Solution Approach 2:
Different regions of the liquid crystal panel are assigned different light transmittance characteristics - the first region maintains high transmittance for bright portions while the second region reduces transmittance for dark portions. This local differentiation enables improved image contrast and detail visibility without requiring multiple separate panels.
2Device complexity
If a single liquid crystal panel uniformly adjusts light across the entire screen, then the device complexity is low, but the display quality for distinguishing bright and dark portions is poor
Solution Approach 1:
The liquid crystal panel is divided into multiple regions (first region for bright portions, second region for dark portions) that can be independently controlled. This segmentation allows differential light adjustment across different areas of the screen, improving the ability to distinguish between bright and dark portions while maintaining a relatively simple single-panel structure.
Solution Approach 2:
Different regions of the liquid crystal panel are assigned different light transmittance characteristics - the first region maintains high transmittance for bright portions while the second region reduces transmittance for dark portions. This local differentiation enables improved image contrast and detail visibility without requiring multiple separate panels.
3Illumination intensity
If the brightness of the displayed image is enhanced, then the bright portions become brighter, but the dark portions also become brighter reducing contrast
Solution Approach 1:
Different regions of the liquid crystal panel are assigned different light transmittance characteristics - the first region maintains high transmittance for bright portions while the second region reduces transmittance for dark portions. This local differentiation enables improved image contrast and detail visibility without requiring multiple separate panels.
Solution Approach 2:
The liquid crystal panel dynamically adjusts the transmittance of different regions based on the displayed content - enhancing transmittance in regions corresponding to bright portions and reducing transmittance in regions corresponding to dark portions. This dynamic adaptation maintains overall brightness while preserving brightness differentiation.
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 enables improved display quality by maintaining high luminance for bright portions while reducing brightness for dark portions, thereby enhancing contrast and suppressing manufacturing costs through the use of less complex components.
Implementation Method 1
a first liquid crystal panel on which light of the first wavelength band is made incident, a second liquid crystal panel on which light of the second wavelength band is made incident, and a third liquid crystal panel on which light of the third wavelength band is made incident
Data Source
AI summary
A display device is disclosed. According to one embodiment, the display device includes a light source, a dimming panel and a display panel. The dimming panel includes a dimming area with sub-areas arrayed in a matrix. The dimming panel also controls a transmittance of light from the light source in each of the sub-areas. The display panel includes a display area with pixels arrayed in a matrix and displays an image due to incident light transmitted through the dimming panel thereon. In one example, an optical separation system is arranged between the dimming panel and the display panel. It separates light from the light source into respective wavelength bands. The display panel includes corresponding liquid crystal panels on which the respective wavelength bands are made incident.