Gate Driving Control Circuit for Display Panel Temperature Compensation
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Solution Overview
Problem
Temperature variations cause deterioration in display quality of flat panel displays due to inadequate gate signal voltage adjustments.
Innovation Solution
A display apparatus with a gate driving control circuit that generates gate clock signals using gate on and off voltages, determines abnormal temperature environments by comparing feedback gate signals from the display panel, and adjusts the voltage level of the gate clock signal to maintain optimal operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If gate signal voltage is kept constant, then device complexity is reduced, but display quality deteriorates in abnormal temperature environments
Solution Approach 1:
The patent implements a feedback mechanism where the gate driving control circuit retrieves feedback gate signals from the display panel during frame display, compares voltage levels between consecutive frames, and uses this feedback information to dynamically adjust gate signal voltages. This closed-loop feedback system enables the circuit to automatically compensate for temperature-induced voltage changes without requiring complex external temperature sensing and control circuits.
Solution Approach 2:
The gate driving control circuit performs self-adjustment by comparing its own output gate signals across different time points and automatically modifying subsequent gate signal voltages based on detected changes. This self-service mechanism eliminates the need for separate temperature sensors, external control circuits, or manual calibration, allowing the system to maintain display quality through autonomous voltage compensation.
2Reliability
If temperature compensation is implemented using traditional methods (temperature variable resistors or initial temperature settings), then display quality is maintained, but device complexity and manufacturing cost increase
Solution Approach 1:
Instead of using traditional temperature variable resistors or initial temperature setting circuits, the patent employs a feedback mechanism that monitors the actual gate signal voltage levels during operation and automatically adjusts voltages based on detected changes. This feedback-based approach replaces complex analog temperature compensation circuits with a simpler digital comparison and adjustment mechanism.
Solution Approach 2:
The patent replaces traditional mechanical or analog temperature compensation methods (such as temperature variable resistors and thermal sensors) with an electronic feedback control system. By substituting physical temperature sensing and analog adjustment with digital voltage comparison and electronic signal modification, the system achieves temperature compensation with reduced component count and lower manufacturing complexity.
3Reliability
If gate signal voltage is increased in low temperature environment, then display quality is maintained, but energy consumption increases
Solution Approach 1:
The patent implements dynamic voltage adjustment where gate signal voltages are modified in real-time based on detected temperature-induced changes. The gate driving control circuit compares feedback signals from consecutive frames and selectively increases or decreases voltage levels only when temperature drift is detected, rather than maintaining constantly elevated voltages. This dynamic adaptation reduces energy consumption compared to static high-voltage operation.
Solution Approach 2:
The system changes the voltage parameter of gate signals dynamically based on operating conditions. By detecting voltage level changes in feedback signals and adjusting gate signal parameters accordingly, the system optimizes voltage levels to match actual temperature conditions, consuming higher power only when necessary to compensate for low-temperature voltage drops and returning to normal power consumption when temperature is stable.
Data Source
AI summary
A display apparatus includes a display panel, a gate driver, and a gate driving control circuit. The gate driver is connected to the display panel, and generates gate signals for driving the display panel using a gate clock signal. The gate driving control circuit generates the gate clock signal using a gate on voltage and a gate off voltage, determines whether an operation environment is an abnormal temperature environment by comparing a first feedback gate signal with a second feedback gate signal, and adjusts a voltage level of the gate clock signal in the abnormal temperature environment. The first feedback gate signal is retrieved from the display panel while a first frame image is displayed on the display panel. The second feedback gate signal is retrieved from the display panel while a second frame image subsequent to the first frame image is displayed on the display panel.