Light-Blocking Layout for Color Mixing Control in Displays
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Solution Overview
Problem
Accurate measurement and control of the width of light blocking members in display devices with color conversion layers is challenging, leading to potential color mixing issues during the manufacturing process.
Innovation Solution
The display device incorporates a first light blocking member extending along a first direction and a second light blocking member disposed perpendicular to the first, with both members having substantially equal widths, allowing precise measurement and control of the light blocking member widths during the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a light blocking member is provided between neighboring color conversion layers to prevent color mixing, then color conversion accuracy is improved, but measuring and controlling the width of the light blocking member becomes difficult
Solution Approach 1:
A mark member is introduced as an intermediary element between the light blocking member and the measurement process. The mark member has a known width that serves as a reference standard, enabling indirect measurement of the light blocking member width through comparison rather than direct measurement, which resolves the difficulty of accurately measuring the light blocking member's width
Solution Approach 2:
The mark member is designed with distinct visual characteristics (different reflectivity or color properties) that make it easily distinguishable from surrounding structures. This visual differentiation enables clear identification and accurate measurement reference during the manufacturing process, solving the measurement difficulty
2Reliability
If the width of light blocking members is not accurately controlled, then manufacturing process becomes simpler, but color mixing between adjacent pixels occurs
Solution Approach 1:
The mark member provides a built-in feedback mechanism for width control. By comparing the measured width of the mark member (which has a predetermined standard width) with the actual width of the light blocking member, the system can detect deviations and adjust the manufacturing process accordingly, ensuring consistent prevention of color mixing while maintaining manufacturing precision
Solution Approach 2:
The mark member with its predetermined standard width is prepared in advance as a reference standard before the actual measurement and control process begins. This preliminary preparation of measurement references enables subsequent accurate width control of light blocking members, ensuring reliable prevention of color mixing
Data Source
AI summary
A display device includes: a substrate, where a first pixel area, a second pixel area, and a third pixel area which are defined on the substrate; and a plurality of light blocking members disposed on the substrate between the pixel areas. The light blocking members include a plurality of first light blocking members continuously extends along a first direction between the first, second and third pixel areas, and a second light blocking member disposed along a second direction perpendicular to the first direction, the second light blocking member is disposed between neighboring third pixel areas which neighbor each other in the first direction, and a width of the first light blocking member and a width of the second light blocking member are substantially the same as each other.