Segmented Backlight and Dimming Panel for Display Contrast
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional display devices with backlit configurations face challenges in achieving high contrast and low power consumption, as the uniform backlight consumption is high, and reducing transmittance alone is insufficient to achieve sufficient contrast.
Innovation Solution
A display device configuration that includes a display panel, a liquid crystal dimming panel, and a light source device with individually adjustable luminance levels and transmittance regions, where the dimming panel is positioned between the display panel and the light source, allowing for localized control of light emission and transmittance to optimize image output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the backlight luminance is increased to achieve high contrast, then the contrast ratio improves, but the power consumption increases significantly
Solution Approach 1:
The backlight is divided into multiple independently controllable regions (first segment regions) that can be adjusted according to the local luminance requirements of the display content. This allows high luminance to be applied only where needed rather than uniformly across the entire display, reducing overall power consumption while maintaining contrast in critical areas.
Solution Approach 2:
Different regions of the backlight are assigned different luminance levels based on the local requirements of the displayed image. The system analyzes the image content and applies appropriate luminance to each region, ensuring high contrast where needed while using lower luminance in other areas, thus optimizing power consumption.
2Device complexity
If a single additional panel is used to control light transmittance, then the structure remains simple, but the contrast ratio is insufficient when backlight luminance is high
Solution Approach 1:
The additional panel is divided into multiple second segment regions that can be independently controlled. This segmentation allows different transmittance levels to be applied to different regions, enabling sufficient contrast control even when the overall backlight luminance is high, while maintaining better image quality than a single uniform panel.
3Illumination intensity
If the backlight luminance is uniformly high across the entire display, then the display can show bright images, but the power consumption increases and contrast in specific regions cannot be optimized
Solution Approach 1:
The backlight is segmented into multiple controllable regions, allowing the system to activate only the regions needed for displaying bright content. This eliminates the waste of energizing the entire backlight uniformly, reducing power consumption while maintaining the ability to display bright images where required.
Solution Approach 2:
The backlight luminance levels are dynamically adjusted based on the displayed content requirements. The system continuously analyzes the image and modifies the luminance of different regions in real-time, ensuring optimal brightness for the current display needs while minimizing power consumption.
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 reduced power consumption while maintaining high contrast by adjusting luminance levels and transmittance according to image requirements, improving the overall efficiency of the display device.
Implementation Method 1
a liquid crystal dimming panel overlapping the display panel and including a dimming area configured to be adjusted in transmittance of the light
Data Source
AI summary
According to an aspect, a display device includes: a display panel including a display area provided with pixels; an illuminator including an illumination area configured to emit light to the display panel such that the display area is illuminated from one surface side of the display panel; and a liquid crystal dimming panel overlapping the display panel, and including a dimming area configured to be adjusted in transmittance of the light emitted to another surface side of the display panel through the display area. The illumination area includes first segment regions configured such that luminance levels thereof are individually adjusted. The dimming area includes second segment regions configured such that the light transmittances thereof are individually adjusted. Each of the first segment regions overlaps more than one of the second segment regions. Each of the second segment regions overlaps more than one of the pixels.