Gate Driver Circuit Uniform Luminance Shift Register Groups
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Solution Overview
Problem
Existing gate driver circuits for OLED display panels face challenges in achieving uniform luminance across rows of pixels due to differences in gate drive signals, leading to poor luminance uniformity and display mura.
Innovation Solution
The proposed gate driver circuit includes at least two shift register groups, each with multiple shift register units, first dummy units, and second dummy units. These components are cascaded in a specific sequence to ensure that each shift register unit transmits input signals and reset signals to other units, resulting in uniform gate drive signals across all rows of pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional gate driver circuits are used to drive OLED display panels, then the circuit structure is simple, but the luminance uniformity across rows of pixels deteriorates due to differences in gate drive signals
Solution Approach 1:
The gate driver circuit is divided into multiple shift register groups (first shift register group, second shift register group, etc.), each independently driving different rows of pixels. This segmentation allows each group to generate gate drive signals with optimized characteristics for its specific row, thereby improving luminance uniformity across the entire display panel while maintaining manageable circuit complexity through modular design
Solution Approach 2:
Different shift register groups are configured with different circuit structures or parameter settings to generate gate drive signals tailored to specific row requirements. For example, groups driving different regions may have different transistor sizes, threshold voltages, or signal waveforms, ensuring optimal luminance uniformity for each local region of the display panel
2Manufacturing precision
If multiple shift register groups are used to improve luminance uniformity, then the luminance uniformity improves, but the device complexity increases due to additional components
Solution Approach 1:
Multiple shift register groups share common input signals and control lines, merging the input stage while maintaining separate processing stages. This allows the circuit to function as multiple independent groups for improving luminance uniformity while reducing the total number of components compared to fully independent circuits for each group
Solution Approach 2:
The shift register units within different groups use standardized, universal design patterns that can be replicated across groups. This multi-functionality allows the same basic circuit block to serve multiple purposes across different row groups, reducing overall component diversity and simplifying manufacturing while maintaining the ability to achieve luminance uniformity
Data Source
AI summary
Provided is a gate driver circuit. The gate driver circuit is applicable to a display panel, wherein the display panel includes a plurality of rows of pixels; the gate driver circuit including at least one gate driver sub-circuit; wherein the gate driver sub-circuit includes: at least two shift register groups, wherein each shift register group includes a plurality of shift register units; at least two first dummy units, wherein the at least two first dummy units are respectively coupled to a same input enable terminal and the at least two shift register groups; and at least two second dummy units, wherein the at least two second dummy units are coupled to the at least two shift register groups.