Display Panel Pixel Region Buffering for Cover Window Alignment
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Solution Overview
Problem
Display devices face issues with light leakage and reduced visible area due to misalignment between the display panel and the cover window, leading to degraded visual effects.
Innovation Solution
A display device design featuring a display panel with a first pixel region and a second pixel region, where the second pixel region is in a default black state, and a cover window with a light-shielding region, ensuring the area of the pixel region is larger than the viewable region, and using a photosensitive lens to determine the pixel regions during fabrication to prevent misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the display panel and cover window are not aligned properly, then the manufacturing process is simpler, but light leaks out from the edge of the display region reducing the visible area
Solution Approach 1:
The patent applies preliminary action by pre-defining the pixel region area to be larger than the viewable region area before assembly. This allows the display panel to accommodate alignment deviations without compromising the visible display area, as the extra pixel region acts as a buffer zone that compensates for potential misalignment.
Solution Approach 2:
The patent changes the parameter relationship between pixel region area and viewable region area, making the pixel region intentionally larger. This parameter adjustment enables the system to tolerate alignment variations while maintaining the required visible display area, resolving the contradiction between manufacturing precision and visible area.
2Manufacturing precision
If the pixel region area is made larger than the viewable region, then alignment tolerance is improved, but the non-display region increases
Solution Approach 1:
The patent applies local quality by creating a second pixel region with different functional characteristics - it is configured to display a default black state rather than active image content. This allows the extended pixel region to serve a dual purpose: providing alignment tolerance buffer while minimizing visual impact through the default black state configuration.
3Area of stationary object
If the second pixel region displays images, then the display area is maximized, but light leakage occurs and visual effect is degraded
Solution Approach 1:
The patent applies local quality by assigning different display characteristics to different regions: the first pixel region displays active image content while the second pixel region displays a default black state. This regional differentiation allows the second pixel region to serve as a buffer zone that prevents light leakage issues from affecting the main display area, while still maximizing the overall display area.
Solution Approach 2:
The patent converts the potentially harmful effect of having a larger pixel region (which could cause light leakage) into a benefit by configuring the second pixel region to display default black state. This transformation allows the extended region to act as a light-trapping buffer that prevents leakage into the viewable area, turning what could be a harmful extension into a protective feature.
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 prevents light leakage, maintains display contrast, and ensures a larger display area, resulting in improved visual effects and reduced power consumption by ensuring the second pixel region does not display images, thus maintaining image completeness.
Implementation Method 1
The light-shielding region is disposed with a light-shielding material
Implementation Method 2
moving a photosensitive lens from the light-shielding region to the viewable region, and taking a pixel in an n-th column or an n-th row of the turned-on pixels detected by the photosensitive lens
Data Source
AI summary
A display device including a display panel. The display panel includes a display region and a non-display region surrounding the display region. The display region includes a first pixel region, the non-display region includes a second pixel region, and the first pixel region and the second pixel region together form a pixel region. The first pixel region and the second pixel region each includes a plurality of pixels. The display device also includes a cover window disposed on a light-emitting side of the display panel. The cover window includes a viewable region and a light-shielding region surrounding the viewable region, and the light-shielding region is disposed with a light-shielding material. The area of the pixel region is larger than the area of the viewable region, the first pixel region is arranged opposite to the viewable region, and the second pixel region is arranged opposite to the light-shielding region.