Display Device Alignment Keys in Corner Pixel Groups
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Solution Overview
Problem
Existing display devices face challenges in recognizing alignment keys without causing defects in the peripheral area and minimizing luminance decrease in the display area, which can lead to misalignment and color distortion during manufacturing and assembly processes.
Innovation Solution
The display device incorporates alignment keys disposed in the display area, specifically at the edges of the corners and in pixels displaying the same color, which overlap with the stem of subpixel electrodes, allowing for easier recognition and minimizing luminance reduction by being opaque and strategically positioned to avoid the peripheral area constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If alignment keys are disposed in the peripheral area of the display panel, then alignment key recognition is facilitated, but defects occur in the peripheral area and luminance decreases in the display area
Solution Approach 1:
The alignment keys are extracted from the peripheral area and repositioned within the display area, specifically in pixel groups adjacent to edges of at least two corners. This extraction resolves the contradiction by removing the source of peripheral defects while maintaining alignment key functionality for recognition by alignment key recognition devices.
Solution Approach 2:
The alignment keys are positioned in a specific spatial configuration within the display area - in pixel groups adjacent to edges of at least two corners rather than in the peripheral area. This dimensional repositioning allows the alignment keys to be recognized while avoiding the peripheral area defects and minimizing impact on display luminance.
2Difficulty of detecting and measuring
If alignment keys are disposed in the peripheral area of the display panel, then alignment key recognition is facilitated, but luminance decreases in the display area
Solution Approach 1:
The alignment keys are extracted from the peripheral area and repositioned within the display area in pixel groups adjacent to edges of at least two corners. This extraction minimizes the impact on display area luminance while maintaining alignment key recognition capability.
Solution Approach 2:
The alignment keys are strategically positioned in specific pixel groups adjacent to edges of at least two corners, rather than being uniformly distributed or placed in the peripheral area. This localized positioning optimizes alignment key recognition while minimizing impact on overall display luminance.
3Difficulty of detecting and measuring
If alignment keys are disposed in pixels displaying different colors, then alignment key recognition is improved, but color distortion occurs
Solution Approach 1:
The alignment keys are positioned in pixel groups adjacent to edges of at least two corners, where pixels display the same color. This localized positioning in same-color pixel groups ensures that alignment key recognition is maintained while preventing color distortion that would occur if alignment keys were placed in pixels displaying different colors.
Data Source
AI summary
An embodiment of the present disclosure provides a display device including a substrate including a display area in which a plurality of pixel groups are disposed and a peripheral area disposed around the display area, and a plurality of alignment keys disposed on the substrate, wherein each of the pixel groups may include a plurality of pixels displaying different colors, and the plurality of alignment keys may include first alignment keys that are disposed in the pixel groups adjacent to edges of at least two corners of the display area and that are disposed in a plurality of first pixels that display the same color among a plurality of pixels included in the pixel group.