Gate Driver for Random Pixel Row Compensation
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Solution Overview
Problem
Existing electroluminescence display devices face challenges in compensating for non-uniform luminance due to heat generated by light emitting diodes, which affects picture quality and lifespan, as existing gate drivers struggle to output gate signals to random pixel rows within the vertical display period without disrupting the progressive scan method.
Innovation Solution
An electroluminescence display device with a gate driver comprising multiple stages, including a kth stage for providing an emission signal to an nth pixel row, a first controller for generating a control signal, and a second controller for receiving and shifting the output signal to apply a random gate signal to specific pixel rows, allowing real-time compensation for non-uniform luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a shift register is used to sequentially output gate signals in a progressive scan method, then the gate driver can supply gate signals to all pixel rows in sequence, but it cannot output gate signals to random pixel rows for real-time compensation of non-uniform luminance
Solution Approach 1:
The gate driver is divided into multiple independent stages, where each stage corresponds to a specific pixel row and can be independently controlled. This segmentation allows selective activation of individual stages to output gate signals to specific pixel rows, enabling random row selection while maintaining the progressive scan capability for other rows.
Solution Approach 2:
The gate driver introduces dynamic control mechanisms including a start signal input unit that can dynamically initiate signal output at any stage, and control signals that dynamically adjust the timing and sequence of gate signal output. This dynamic control enables the system to adaptively select which pixel rows receive gate signals and when, facilitating real-time compensation operations.
2Reliability
If the gate driver maintains a fixed sequential output structure, then the circuit design is simple, but real-time compensation for non-uniform luminance caused by heat cannot be achieved
Solution Approach 1:
The gate driver incorporates a sensing unit that detects the actual state of pixel rows, particularly those affected by heat-induced non-uniform luminance. This sensing information feeds back to the control logic, which then dynamically adjusts the gate signal output timing and sequence to compensate for detected anomalies, enabling real-time picture quality improvement.
Solution Approach 2:
The system dynamically changes the timing parameters and sequence of gate signal output based on real-time sensing data. By modifying when and to which pixel rows gate signals are sent, the system can compensate for heat-related luminance non-uniformity without requiring a complete redesign of the gate driver architecture.
3Adaptability or versatility
If the gate driver outputs gate signals to all pixel rows in fixed sequence, then the progressive scan method works smoothly, but selective compensation for specific pixel rows is not possible
Solution Approach 1:
The gate driver is designed with the capability to pre-position and pre-time gate signals for specific pixel rows based on advance knowledge of which rows require compensation. This preliminary preparation allows the system to quickly switch to compensating specific rows without disrupting the overall progressive scan timing, minimizing time loss during compensation operations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables real-time compensation for non-uniform luminance and extends the lifespan of the display device by selectively applying a random gate signal to specific pixel rows, thereby improving picture quality.
Implementation Method 1
The light emitting diode generates heat as well as light while emitting light
Data Source
AI summary
An electroluminescence display device including a gate driver comprised of a plurality of stages, the gate driver comprises a kth stage for providing an emission signal to an nth pixel row (where n and k are natural numbers and 1≤k≤n); a first controller of the kth stage that is connected to the kth stage and providing an input signal; and a second controller of the kth stage that is connected to the kth stage and receiving an output signal of the kth stage as an input signal, wherein the first controller is implemented to generate a control signal for sensing the nth pixel row, and wherein the second controller is connected to an emission line, to which the emission signal is applied, to provide the output signal of the kth stage to the emission line, and the second controller is connected to a first controller of a (k+1)th stage to provide the output signal of the kth stage shifted to an emission carry signal to the first controller of the (k+1)th stage.