GOA Circuit Segmentation for High Refresh Touch
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Solution Overview
Problem
Current GOA panels with a 60 Hz refresh frequency are insufficient for larger touch products, such as notebook computers, as they require a touch report rate higher than 100/s, limiting the use of In Cell touch technology with narrow frames.
Innovation Solution
A GOA circuit with multiple sub-circuits, each connected to an independent start signal terminal, allowing for separated touch signal acquisition periods, and incorporating cascaded shift register units and noise cancelling control signals to enhance touch signal reporting rates beyond the refresh frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a GOA panel uses a 60 Hz refresh frequency, then the display can maintain stable image quality, but the touch signal report rate cannot exceed 60/s which is insufficient for larger touch products
Solution Approach 1:
The GOA circuit is divided into multiple independent GOA sub-circuits (first GOA sub-circuit, second GOA sub-circuit, etc.), each capable of independent operation. This segmentation allows the touch signal acquisition to be performed in parallel across different sub-circuits, thereby increasing the overall touch report rate while maintaining the 60 Hz display refresh frequency for stable image quality.
2Ease of manufacture
If the GOA panel integrates the GOA circuit into the peripheral area to achieve narrow frame design, then the integration and manufacturing cost are improved, but the touch function cannot meet higher report rate requirements for larger products
Solution Approach 1:
The GOA circuit is segmented into multiple sub-circuits that can be independently configured and activated. This allows the system to maintain the integration benefits of GOA technology while adapting to different product sizes and touch report rate requirements by selectively using one or multiple sub-circuits.
Solution Approach 2:
The system dynamically adjusts the operation mode by selectively activating different GOA sub-circuits based on the required touch report rate. When higher report rates are needed, additional sub-circuits are activated to perform parallel touch signal acquisition, making the system adaptable to various product requirements.
3Productivity
If multiple GOA sub-circuits are used to increase touch report rate, then the touch signal acquisition capability is improved, but the device complexity increases
Solution Approach 1:
The GOA circuit is divided into multiple identical or similar sub-circuits, each with the same internal structure. This modular segmentation allows for increased touch report rate while keeping individual sub-circuit complexity manageable and enabling standardized manufacturing processes.
Solution Approach 2:
The system changes the operational parameters by activating different numbers and combinations of GOA sub-circuits based on the required touch report rate. This allows the system to scale performance without permanently increasing physical complexity, as sub-circuits can be selectively enabled or disabled.
Data Source
AI summary
The present disclosure provides a GOA circuit, a method for driving the GOA circuit, and a display panel. The GOA circuit includes a plurality of GOA sub-circuits. Each GOA sub-circuit includes a plurality of cascaded shift register units. Each of the GOA sub-circuits is connected to an independent start signal terminal, and the start signals of different GOA sub-circuits are separated by a time interval for acquisition of touch signals.