Gate Driver Reset Stages for Display Bezel Minimization
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Solution Overview
Problem
The existing display apparatuses with light emitting diodes face challenges in minimizing the bezel area occupied by the gate driver, which limits the reduction of the display's non-display area and can cause luminance differences due to varying driving frequencies, affecting image quality.
Innovation Solution
A display apparatus design where the connection relationship between the gate driver and pixels is optimized, allowing the anode electrode of each pixel to be independently initialized using a shared reset signal, reducing the bezel area and minimizing luminance variations across different frequencies by configuring the gate driver with shared reset driving stages that output signals to multiple pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate gate driver is added to supply initialization voltage to the anode electrode of the light emitting diode, then the anode electrode can be independently initialized, but the bezel area occupied by the gate driver increases
Solution Approach 1:
The gate driver is designed to perform multiple functions: it supplies both scan signals to gate lines and initialization voltages to anode electrodes through shared driving stages. The reset driving stages output reset signals that are simultaneously applied to multiple pixels, enabling the gate driver to initialize anode electrodes without requiring separate dedicated driver circuits, thereby reducing the bezel area while maintaining independent initialization capability
Solution Approach 2:
The patent merges the initialization function into the existing gate driver structure by integrating reset driving stages with scan and emission driving stages. The gate driver combines multiple functions (scan signal generation, emission signal generation, and initialization voltage supply) into a single integrated circuit, eliminating the need for separate gate drivers and reducing the occupied bezel area
2Adaptability or versatility
If the driving frequency is varied to adjust display performance, then the display can adapt to different usage scenarios, but luminance differences occur affecting image quality
Solution Approach 1:
The patent implements periodic initialization using reset signals that are applied at regular intervals regardless of the driving frequency. The reset driving stages generate periodic reset signals that initialize the anode electrodes at consistent time intervals, ensuring that luminance remains stable and consistent across different driving frequencies. This periodic action compensates for frequency variations and maintains uniform display quality
Solution Approach 2:
The gate driver incorporates feedback mechanisms where the reset driving stages monitor and adjust the initialization timing based on the actual driving frequency. By detecting frequency variations and dynamically adjusting the reset signal timing, the system maintains consistent luminance output across different operating conditions, preventing image quality degradation
Data Source
AI summary
A display apparatus can include an Nth scan driving stage among a plurality of scan driving stages, which outputs an Nth scan signal to an Nth pixel and an N+1th pixel among the plurality of pixels. Further, an N+1th scan driving stage among the plurality of scan driving stages is configured to output an N+1th scan signal to the N+1th pixel among the plurality of pixels, and a Kth reset driving stage among the plurality of reset driving stages is configured to output a Kth reset signal to the Nth pixel and the N+1th pixel. An anode electrode of a light emitting diode in each of the Nth pixel and the N+1th pixel is initialized in accordance with the Kth reset signal.