Transparent Display Spacer Placement for Cell Gap Control
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Solution Overview
Problem
In transparent displays, unevenness on the outermost surface of the array substrate can lead to variations in the cell gap between the array and counter substrates, compromising display quality due to the placement of spacers which contact these uneven areas.
Innovation Solution
The display device incorporates a spacer that contacts the flat outermost surface of the array substrate, reducing unevenness and suppressing variations in the cell gap by arranging it at intersections where the gate and source wirings intersect, ensuring a consistent surface for the spacer to sit on.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spacer is arranged at an intersection between gate wiring and source wiring to maintain cell gap, then the aperture ratio of pixel is preserved, but surface unevenness increases due to contact with conductive layers
Solution Approach 1:
The conductive layer is divided into multiple segments (first conductive layer, second conductive layer, third conductive layer) with the spacer contacting only the first conductive layer at the intersection region, while other conductive layers are positioned separately to avoid creating surface unevenness at the spacer contact point
Solution Approach 2:
The spacer is specifically positioned to contact only the first conductive layer at the intersection of gate and source wirings, while the second and third conductive layers are arranged to extend in different directions and not contact the spacer, creating a localized smooth contact surface where needed
Data Source
AI summary
A display device includes a first conductive layer arranged above a first substrate and extending in a first direction, a first insulating film arranged above the first conductive layer, a second conductive layer and a third conductive layer arranged above the first insulating film and extending in a second direction intersecting the first direction, a second insulating film arranged above the second conductive layer and the third conductive layer, a fourth conductive layer arranged above the second insulating film and extending in the second direction, and a spacer arranged in a second substrate arranged to face the first substrate.