Gate Driver Output Isolation for Display Overheat Prevention
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Solution Overview
Problem
Conventional electronic devices face issues with abnormal image display and overheating due to damaged gate driving circuit output units causing short circuits, leading to potential device failure.
Innovation Solution
The electronic device incorporates an active and non-active region design with output control components and control circuits that can turn on or off based on enable signals, detecting and isolating abnormal signals to prevent their impact on the electronic component.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the gate driving circuit output unit is damaged and provides abnormal output signal, then the electronic device may overheat and burn out due to short circuit, but adding output control components and control circuits increases device complexity
Solution Approach 1:
The gate driving circuit is divided into multiple output units (first output unit, second output unit, etc.), each independently controllable through separate output control components. This segmentation allows isolated control of damaged sections while maintaining functionality of healthy sections, resolving the contradiction by enabling targeted protection without requiring complete system shutdown or complex global control mechanisms.
Solution Approach 2:
Output control components (transistors) are introduced as intermediary elements between the gate driving circuit output units and the electronic components (pixel circuits). These intermediaries can be selectively turned on or off based on the normalcy of output signals, preventing abnormal signals from reaching electronic components while maintaining normal signal transmission, thus protecting against overheating without requiring direct monitoring at each electronic component.
2Reliability
If output control components are added to isolate abnormal signals, then abnormal image display and overheating are prevented, but the area of the non-active region increases
Solution Approach 1:
The output control components are merged with the existing gate driving circuit structure in the non-active region, sharing the same substrate and integration layer. The control circuits are also integrated within the non-active region, utilizing common manufacturing processes and material layers. This merging approach minimizes the additional area required by combining multiple functions (signal generation, signal monitoring, and signal control) into a unified circuit block rather than adding separate discrete components.
3Measurement precision
If the detecting circuit monitors each output signal to determine normalcy, then abnormal signals are detected early, but the manufacturing precision requirements increase
Solution Approach 1:
The detecting circuit utilizes the inherent electrical characteristics of the output signals themselves (voltage levels, signal presence) to determine normalcy, rather than requiring external measurement equipment or complex test structures. The control transistors automatically respond to signal conditions through their gate-control mechanism, where the presence or absence of proper voltage levels directly controls their on/off state, eliminating the need for high-precision external measurement and control systems.
Data Source
AI summary
An electronic device having an active region and a non-active region is provided and includes an electronic component, a first gate driving circuit, at least one first output control component and a first control circuit. The electronic component is disposed in the active region, and the first gate driving circuit, the first output control component and the first control circuit are disposed in the non-active region. The first gate driving circuit is coupled to the electronic component. The first output control component includes a control terminal, a first terminal and a second terminal, wherein the control terminal of the first output control component is coupled to the first control circuit, the first terminal of the first output control component is coupled to the first gate driving circuit, and the second terminal of the at least one first output control component is coupled to the electronic component.