Display Panel Sub-Pixel Arrangement for Contrast and Moiré Reduction
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Solution Overview
Problem
Current display technologies face challenges in achieving high contrast and reducing color moiré effects while maintaining good transmittance, particularly in vehicle dashboards and other applications, due to increased manufacturing costs, power consumption, and weight associated with local dimming technologies.
Innovation Solution
A display device comprising a backlight module, a dimming panel with a light-shielding structure and control electrodes, and a display panel with a repeat unit consisting of first, second, and third pixel units, each with unique sub-pixel arrangements and equal areas shielded by the light-shielding structure, to achieve high contrast and reduce color moiré effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If local dimming technology is used to adjust contrast, then contrast is improved, but manufacturing cost increases
Solution Approach 1:
The display panel is divided into multiple pixel units (first, second, and third pixel units) with different sub-pixel arrangements. Each pixel unit has a specific arrangement of color sub-pixels (red, green, blue) that segments the overall display structure. This segmentation allows different regions to have optimized characteristics for contrast and color accuracy without requiring complex local dimming mechanisms, thereby improving contrast while avoiding increased manufacturing costs.
Solution Approach 2:
Different pixel units are designed with different sub-pixel arrangements tailored to their specific functions. For example, certain pixel units may have arrangements optimized for high contrast regions while others are optimized for color accuracy. The light-shielding structure is also designed with varying densities and patterns in different regions to provide local optimization of contrast and color performance without uniformly increasing manufacturing complexity.
2Illumination intensity
If local dimming technology is used to adjust contrast, then contrast is improved, but power consumption increases
Solution Approach 1:
The display device dynamically adjusts the illumination intensity of different pixel units based on the displayed content and environmental conditions. By dynamically controlling which pixel units require high contrast and which can operate at lower power levels, the system achieves high contrast when needed while minimizing overall power consumption, avoiding the continuous high power consumption associated with traditional local dimming technology.
3Illumination intensity
If local dimming technology is used to adjust contrast, then contrast is improved, but weight increases
Solution Approach 1:
Instead of using a heavy local dimming mechanism that segments the backlight into multiple independently controllable zones, this invention segments the display panel into pixel units with different sub-pixel arrangements. This approach achieves contrast enhancement through optical design rather than mechanical dimming components, significantly reducing the overall weight while maintaining high contrast performance.
4Object-affected harmful factors
If sub-pixel arrangements are varied in different pixel units, then color moiré effect is reduced, but device complexity increases
Solution Approach 1:
Different pixel units employ asymmetric sub-pixel arrangements to break the periodicity that causes moiré effects. For example, while one pixel unit may have a standard RGB arrangement, adjacent pixel units use variations such as RBG, GRB, or other permutations. This asymmetric design effectively reduces color moiré effects. The complexity is managed by using regular patterns of these asymmetric arrangements that can be systematically implemented in the manufacturing process.
Solution Approach 2:
Instead of varying sub-pixel arrangements across every single pixel unit, the invention applies different arrangements to selected pixel units based on their functional requirements and position in the display. This partial application of asymmetric arrangements is sufficient to reduce moiré effects while minimizing the increase in device complexity, avoiding the need to redesign every pixel unit in the display panel.
5Illumination intensity
If equal areas are shielded by light-shielding structure for different color sub-pixels, then transmittance is improved, but manufacturing precision requirements increase
Solution Approach 1:
The light-shielding structure is designed with specific geometric parameters and patterns that are optimized to provide equal area shielding for different color sub-pixels. By carefully selecting and standardizing these geometric parameters, the design achieves uniform transmittance characteristics across different pixel units. The parameters are chosen to balance manufacturing precision requirements with the need for equal area shielding, using dimensions and patterns that are feasible to manufacture with standard precision capabilities.
Data Source
AI summary
A display panel including a dimming panel and a display panel is provided. The dimming panel includes a light-shielding structure. The display panel is disposed on the dimming panel and includes a repeat unit including a first pixel unit, a second pixel unit and a third pixel unit, wherein each of the first pixel unit, the second pixel unit and the third pixel unit includes a first color sub-pixel, a second color sub-pixel and a third color sub-pixel, wherein the arrangement of the first color sub-pixel, the second color sub-pixel and the third color sub-pixel in the first pixel unit, the arrangement of the first color sub-pixel, the second color sub-pixel and the third color sub-pixel in the second pixel unit and the arrangement of the first color sub-pixel, the second color sub-pixel and the third color sub-pixel in the third pixel unit are different from each other, and the total area shielded by the light-shielding structure of the first color sub-pixels in the repeat unit, the total area shielded by the light-shielding structure of the second color sub-pixels in the repeat unit and the total area shielded by the light-shielding structure of the third color sub-pixels in the repeat unit are equal.