Gate Driver Circuit Integrating Light Emitting Signal Generation
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Solution Overview
Problem
Traditional integrated gate driver circuits for organic light emitting diode panels can only provide a scanning signal, lacking the ability to output control signals for threshold voltage compensation, which shortens the service life and increases costs due to the need for external circuits to provide light emitting signals.
Innovation Solution
A gate driver circuit unit that generates both scanning and light emitting signals, utilizing a light emitting signal generating unit and sharing clock signals with the scanning signal generating unit, allowing for integration of light emitting signal functionality within the gate driver circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional integrated gate driver circuits are used, then the circuit structure is simple, but the circuit cannot provide light emitting signals for threshold voltage compensation, shortening service life
Solution Approach 1:
The patent combines the light emitting signal generating unit with the scanning signal generating unit within the same gate driver circuit. The light emitting signal generating unit shares clock signals (first clock signal VA and second clock signal VB) and control signals with the scanning signal generating unit, integrating multiple functions into a single circuit block. This merging approach enables threshold voltage compensation capability while maintaining circuit simplicity and extending service life.
Solution Approach 2:
The gate driver circuit is designed to perform multiple functions: generating scanning signals for pixel row selection and generating light emitting signals for threshold voltage compensation. The circuit uses shared resources (clock signals, control signals) to achieve multi-functionality without proportionally increasing complexity, allowing the same circuit structure to provide both scanning and compensation functions.
2Ease of manufacture
If external integrated circuit is used to provide light emitting signal, then the light emitting signal can be provided, but the cost increases and lightening/thinning is hindered
Solution Approach 1:
The patent integrates the light emitting signal generating unit into the gate driver circuit, eliminating the need for separate external integrated circuits. This consolidation reduces component count and manufacturing cost while maintaining the necessary light emitting signal functionality for threshold voltage compensation, directly addressing both cost reduction and panel thinning requirements.
Solution Approach 2:
The invention extracts the light emitting signal generating function from external circuits and relocates it within the gate driver circuit. This extraction and reintegration process eliminates dependency on external components, reducing cost and enabling panel lightening/thinning while preserving the essential compensation functionality.
3Reliability
If multiple control signal lines are added for threshold voltage compensation, then the threshold voltage shift can be compensated, but the device complexity increases
Solution Approach 1:
The patent merges the light emitting signal generating unit with the existing scanning signal generating unit, allowing both functions to share clock signals and control signal lines. This integration enables threshold voltage compensation capability while avoiding the need for separate dedicated control signal lines, thus compensating for threshold voltage shift without proportionally increasing device complexity.
Data Source
AI summary
An organic light emitting diode panel, a gate driver circuit and a gate driver circuit unit are disclosed, where the gate driver circuit includes a scanning signal generating unit for generating a scanning signal, transmitting a first clock signal to a scanning signal output terminal under the control of a pulse signal, and pulling down and maintaining the voltage of the scanning signal output terminal at a low voltage level under the control of a second clock signal. The gate driver circuit unit also includes a light emitting signal generating unit for generating a light emitting signal, pulling down the voltage of the light emitting signal output terminal under the control of the pulse signal, and charging the light emitting signal output terminal under the control of the second clock signal.