In-Display Gate Driving Circuit for Zero-Bezel Transparent Displays
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Solution Overview
Problem
Display apparatuses with gate-in-panel structures face issues of increased bezel width due to the gate driving circuit, leading to size and transmittance deviations between transmissive parts, which cause image quality defects like line-shaped stripes and reduced transparency.
Innovation Solution
Incorporating a gate driving circuit within the display area and using dummy patterns to cover branch circuits, thereby minimizing size and transmittance deviations between transmissive parts, and eliminating the need for a bezel area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the gate driving circuit is disposed in the non-display area, then the circuit configuration is simplified and manufacturing cost is decreased, but the bezel width increases
Solution Approach 1:
The gate driving circuit is moved from the traditional non-display area (bezel region) into the display area, utilizing the space between pixels. This dimensional repositioning allows the circuit to be integrated within the active display region, eliminating the need for a separate bezel area while maintaining circuit functionality.
Solution Approach 2:
The gate driving circuit branches are nested within the display area by positioning them between adjacent pixels. Each branch circuit is embedded in the space between pixel groups, creating a nested structure where the circuit is contained within the display region rather than occupying external bezel space.
2Length of moving object
If the gate driving circuit is disposed in the display area, then the bezel width is reduced to zero, but size and transmittance deviations between transmissive parts occur causing image quality defects
Solution Approach 1:
Dummy patterns are selectively positioned only in regions where branch circuits are located, rather than uniformly across the entire display. This local compensation approach targets specific areas with transmittance deviations, making the dummy patterns invisible in non-circuit regions while correcting optical uniformity in circuit-affected areas.
Solution Approach 2:
The dummy patterns are designed with optical properties that match the surrounding pixel regions, making them visually indistinguishable from adjacent pixels. By matching the transmittance and optical characteristics of the dummy patterns to the pixel array, the patterns become invisible while still providing the necessary compensation for transmittance deviations.
3Adaptability or versatility
If transparent display apparatus is implemented, then users can see objects at the rear surface, but transmissive parts with different sizes cause line-shaped stripes and image quality defects
Solution Approach 1:
Dummy patterns are selectively positioned only in regions where branch circuits are located, rather than uniformly across the entire display. This local compensation approach targets specific areas with transmittance deviations, making the dummy patterns invisible in non-circuit regions while correcting optical uniformity in circuit-affected areas.
Solution Approach 2:
The dummy patterns are designed with optical properties that match the surrounding pixel regions, making them visually indistinguishable from adjacent pixels. By matching the transmittance and optical characteristics of the dummy patterns to the pixel array, the patterns become invisible while still providing the necessary compensation for transmittance deviations.
Data Source
AI summary
A display apparatus includes a substrate including a display area configured to include a plurality of pixels disposed along a first direction and a second direction intersecting with the first direction, a gate driving circuit disposed at the display area and including a plurality of branch circuits for supplying a scan signal to the plurality of pixels, and a plurality of dummy patterns respectively covering the plurality of branch circuits.