Shift Register Output Transistor Relocation for Display Panel Thermal Stability
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Solution Overview
Problem
High temperatures in display panels lead to increased threshold voltage of transistors, causing abnormal signal output and the 'splash screen' display phenomenon due to the proximity of output transistors to the display region, which affects the normal operation and increases the heating efficiency in the circuit.
Innovation Solution
Increasing the distance between the output transistors in the shift register and the display region by strategically arranging the switch module and output module, with the output transistors located away from the display region, and placing driving signal lines between the shift register and the display region to reduce the impact of high temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If output transistors are placed close to the display region to reduce signal transmission distance, then signal transmission efficiency is improved, but the threshold voltage of transistors increases due to high temperature, causing abnormal display phenomena
Solution Approach 1:
The patent extracts the output transistors from the region close to the display and relocates them to the non-display region. This separation removes the harmful thermal influence on the transistors while maintaining functional connectivity through signal transmission lines, thereby preventing threshold voltage increases and abnormal display phenomena.
Solution Approach 2:
The patent introduces signal transmission lines as intermediaries between the shifted register and the display region. These lines carry control signals from the relocated output transistors to the display area, enabling functional connection while maintaining physical separation that protects transistor performance from thermal effects.
2Reliability
If output transistors are placed away from the display region to reduce temperature impact, then transistor reliability is improved, but signal transmission distance increases, potentially affecting signal quality
Solution Approach 1:
The output transistors are extracted from the display-proximal region and relocated to the non-display region. This extraction prioritizes transistor reliability by eliminating thermal influence, while the signal transmission distance is managed through optimized routing in the non-display region where longer paths do not compromise signal integrity.
3Device complexity
If shift register is positioned close to the display region to simplify circuit layout, then device complexity is reduced, but heating efficiency increases causing abnormal display phenomena
Solution Approach 1:
The shift register and its output transistors are extracted from the display-proximal region and repositioned in the non-display region. This relocation reduces thermal influence on transistor threshold voltage while the circuit layout complexity is managed through systematic arrangement in the non-display region, separating functional blocks to minimize thermal coupling.
Data Source
AI summary
A display panel and a display device are provided. In an embodiment, the display panel has a display region and a non-display region and includes shift registers cascaded and arranged along a first direction. In an embodiment, the shift registers are located in the non-display region. In an embodiment, one of the shift registers includes a switch module and an output module. In an embodiment, the output module is coupled to an output terminal of the shift register and includes two output transistors, and the output transistors are located at a side of the switch module away from the display region. In this way, the probability of occurrence of abnormal phenomena, such as splash screen display, is reduced.