Display Gate Driver Symmetrical Scan Reset Stages
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Solution Overview
Problem
The existing display apparatuses face challenges in minimizing the bezel area occupied by the gate driver, which supplies initialization voltage to the anode electrode of light emitting diodes, leading to increased size and potential image quality variations due to luminance differences caused by changing driving frequencies.
Innovation Solution
A display apparatus design where the gate driver is configured with symmetrical scan and reset driving stages sharing signal lines, allowing the anode electrode of the light emitting diode to be independently initialized, thereby minimizing the bezel area and maintaining consistent image quality across varying frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate gate driver is added to supply initialization voltage to the anode electrode, then the anode electrode can be independently initialized, but the bezel area occupied by the gate driver increases
Solution Approach 1:
The patent combines the initialization function for the anode electrode with the existing gate driver structure by sharing signal lines between scan driving stages and reset driving stages. This merging approach allows independent initialization capability to be achieved without adding a completely separate gate driver, thereby reducing the bezel area occupation.
Solution Approach 2:
The gate driver is designed with multi-functionality where the same signal lines are used for both scan operations and reset operations. The reset driving stages share signal lines with scan driving stages, enabling the gate driver to perform multiple functions (scanning and initialization) without requiring additional dedicated hardware, thus minimizing bezel area.
2Adaptability or versatility
If the driving frequency is changed, then the display can adapt to different operating conditions, but luminance differences occur causing image quality variation
Solution Approach 1:
The patent implements periodic reset signals that are synchronized with the scan signals at different driving frequencies. By maintaining periodic reset actions regardless of the driving frequency, the initialization of the anode electrode is ensured at each frame, preventing luminance differences and maintaining consistent image quality across varying frequencies.
Solution Approach 2:
The patent adjusts the timing parameters of the reset signals to match different driving frequencies. By changing the temporal parameters of the initialization process to correspond with the driving frequency, the system maintains proper initialization conditions across different operating frequencies, 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, in accordance with a scan start signal and a plurality of gate clock signals. Further, an Nth reset driving stage among the plurality of reset driving stages outputs an Nth reset signal to the Nth pixel in accordance with a reset start signal and the plurality of gate clock signals. The Nth scan driving stage and the Nth reset driving stage can be symmetrical with respect to a plurality of gate clock signals lines to which a plurality of gate clock signals is applied, and an anode electrode of the light emitting diode included in the Nth pixel can be initialized in accordance with the Nth reset signal.