Driver Chip Pin Sharing for Display ESD Protection
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Solution Overview
Problem
Display devices face challenges in electrostatic protection, leading to potential damage to key pins of driver chips and related lines, which affects display and touch performance.
Innovation Solution
The implementation of a display module with a driver chip that includes both first and second pins, where the drive signal is related to the first pin's signal but unrelated to the second pin's signal, and where the first pin is electrically connected to the second pin to share electrostatic protection, thereby reducing the risk of damage from excessive electrostatic loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single electrostatic protection circuit is used for each pin, then the circuit design is simple, but the electrostatic protection capability is insufficient when static electricity exceeds the load
Solution Approach 1:
The patent merges multiple electrostatic protection circuits by electrically connecting multiple pins (first pin and second pin) to share a common electrostatic protection function. When static electricity is introduced to the first pin, both the first electrostatic protection circuit and second electrostatic protection circuit work together to withstand the electrostatic load, thereby improving the overall electrostatic protection capability without requiring a completely new design for each pin.
Solution Approach 2:
The patent makes the electrostatic protection system universal by enabling multiple pins to serve dual purposes: their normal signal transmission function and their electrostatic protection function. The second pin, which may not be used for critical signal transmission, is utilized to provide electrostatic protection for the first pin, thereby improving the reliability of the system without adding dedicated protection circuits for each pin.
2Reliability
If electrostatic protection is enhanced for key pins, then the reliability of signal transmission is improved, but the device complexity increases
Solution Approach 1:
The patent combines multiple electrostatic protection circuits into a shared protection system. By electrically connecting the first pin and second pin, the system creates a unified electrostatic protection mechanism that protects critical signal transmission paths without requiring separate, complex protection circuits for each pin, thus improving reliability while controlling complexity.
3Reliability
If multiple electrostatic protection circuits are connected to withstand electrostatic load, then the electrostatic protection capability is improved, but the circuit complexity increases
Solution Approach 1:
The patent merges multiple electrostatic protection circuits by establishing electrical connections between multiple pins. This allows the first electrostatic protection circuit and second electrostatic protection circuit to work together as an integrated system, improving electrostatic protection capability while avoiding the need for completely separate, complex protection circuits for each pin.
Solution Approach 2:
The patent enables multiple pins to serve multiple functions simultaneously. The second pin serves both its original function and an additional electrostatic protection function for the first pin. This multi-functionality approach improves electrostatic protection capability without requiring dedicated, complex protection circuits for each function.
Data Source
AI summary
Provided are a display module and a display device. The display module includes a display screen and a driver chip. The display screen includes a display region and a non-display region. The driver chip is disposed in the non-display region of the display screen and configured to at least generate a drive signal that drives the display screen. The driver chip includes at least one first pin and at least one second pin, the drive signal generated by the driver chip is related to a signal transmitted by the at least one first pin, and the drive signal generated by the driver chip is unrelated to a signal transmitted by the at least one second pin. At least one of the at least one first pin is electrically connected to at least one of the at least one second pin.