Pixel Initialization Voltage Control for Display Overcurrent
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Solution Overview
Problem
Display devices experience increased power consumption and panel current when load of input image data increases, leading to potential overcurrent issues.
Innovation Solution
Incorporation of a panel current sensor to generate an overcurrent alert signal, a driving controller to manage an overcurrent prevention mode, and an initialization voltage generator to control pixel initialization voltage, including an overcurrent prevention transistor and non-inverting amplifier to regulate voltage gain and prevent overcurrent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the load of input image data increases, then the display quality and brightness are improved, but the panel current and power consumption increase leading to overcurrent issues
Solution Approach 1:
The initialization voltage is dynamically adjusted based on the detected panel current. When overcurrent is detected, the driving controller modifies the initialization voltage applied to pixels in response, creating a dynamic adaptation mechanism that balances display performance with power consumption constraints
Solution Approach 2:
A feedback loop is established where the panel current sensor continuously monitors panel current, generates overcurrent alert signals when thresholds are exceeded, and feeds this information back to the driving controller. The controller then adjusts the initialization voltage accordingly, forming a closed-loop control system that prevents overcurrent while maintaining display quality
2Reliability
If the panel current is increased to improve display performance, then the brightness and image quality are enhanced, but the power consumption increases and causes overcurrent problems
Solution Approach 1:
The system applies preliminary anti-action by detecting overcurrent conditions and preemptively adjusting the initialization voltage to prevent harmful overcurrent effects. The overcurrent prevention transistor and amplifier circuit are configured to counteract excessive current before it causes damage, protecting the display panel while maintaining performance
Solution Approach 2:
The invention changes the electrical parameters of the pixel initialization process by adjusting the initialization voltage level in response to overcurrent detection. This parameter modification allows the system to operate safely within current limits while preserving display quality through optimized voltage control
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
Reduces power consumption by preventing overcurrent and maintaining luminance stability, ensuring visible luminance changes are minimized.
Implementation Method 1
a panel current sensor configured to sense a panel current of the display panel
Implementation Method 2
an overcurrent prevention transistor turned on in response to the overcurrent prevention enable signal, and a non-inverting amplifier connected to the overcurrent prevention transistor and configured to generate the initialization voltage
Data Source
AI summary
A display device comprises a display panel including pixels, a panel current sensor configured to sense a panel current of the display panel, and generate an overcurrent alert signal when the panel current is greater than a limit current, a driving controller configured to generate an overcurrent prevention enable signal for determining whether to turn on an overcurrent prevention mode based on the overcurrent alert signal, and an initialization voltage generator configured to control an initialization voltage applied to the pixels in response to the overcurrent prevention enable signal.