Peripheral Color Filter Shift and Thickness Reduction for Display Uniformity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices with wide viewing angles suffer from a decrease in light intensity in peripheral sections due to blocking by peripheral structures, which affects image quality, and existing pupil correction techniques are not applicable without modifications.
Innovation Solution
A display device with a color filter layer where color filters in the peripheral section are shifted from their center locations and have smaller thicknesses than those in the central section, reducing the difference in optical path length and minimizing light shading by peripheral structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the viewing angle is widened, then the number of eyepiece elements is reduced, but light intensity in the peripheral section decreases due to blocking by peripheral structures
Solution Approach 1:
The patent applies local quality by differentiating the treatment of color filters in different regions of the display. Specifically, color filters in the peripheral section are made with different properties (different materials or structures) compared to those in the central section, allowing optimized light transmission for each region's specific requirements and compensating for the blocking effect in peripheral areas
Solution Approach 2:
The patent changes physical parameters of the color filters, such as material composition, thickness, or optical properties, to adjust the optical path and light transmission characteristics. This enables compensation for the reduced light intensity in peripheral sections while maintaining the wide viewing angle benefit
2Reliability
If pupil correction technique is applied to image sensors, then sensitivity in peripheral section is maintained, but the technique cannot be directly applied to display devices due to different constituent elements
Solution Approach 1:
The patent adapts the pupil correction concept to display devices by changing the optical parameters of the color filters themselves. Instead of adjusting pixel positions or adding external optical elements, the invention modifies the color filter properties (material, thickness, structure) to achieve similar pupil correction effects suitable for display device architecture
Solution Approach 2:
The color filter serves as an intermediary element that is modified to achieve pupil correction. By adjusting the color filter's optical properties, the patent creates a mediating solution that bridges the gap between the pupil correction concept from image sensors and the specific requirements of display device constituent elements
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 image quality by maintaining light intensity and uniformity across the display region, reducing luminance and chromaticity variations, and improving overall display image quality.
Implementation Method 1
a color filter layer having a plurality of color filters, the color filters facing the plurality of pixels, each of the color filters corresponding to one of a plurality of colors
Data Source
AI summary
A display device includes: a plurality of pixels arranged in a two-dimensional fashion, each of the pixels including a light emitting device; and a color filter layer having color filters, the color filters facing the plurality of pixels, each of the color filters corresponding to one of a plurality of colors. Of a plurality of color filters in the color filter layer, color filters disposed in a peripheral section within a display region are shifted from center locations of corresponding pixels, and have smaller thicknesses than thicknesses of color filters disposed in a central section within the display region.