OLED Driving Device Temperature Adaptive Waveform Control
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Solution Overview
Problem
Existing OLED display panel driving devices lack flexibility in drive signal output, leading to increased operating temperatures and accelerated brightness attenuation, resulting in a short service life due to fixed waveform output.
Innovation Solution
A driving device comprising a temperature sensor, a timing controller, and a source driving circuit that adjusts drive signal parameters such as waveform, duty cycle, and bias voltage based on sensed operating temperatures to optimize pixel illumination, including storing corresponding relationships between temperature ranges and candidate parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed waveform drive signal is output, then the device structure is simple, but the operating temperature increases and brightness attenuation accelerates
Solution Approach 1:
The patent implements dynamic drive signal output by switching between different waveforms (DC, negative bias pulse, positive bias pulse) based on temperature ranges. The timing controller dynamically selects the appropriate waveform according to the current operating temperature, transforming the fixed drive signal system into a dynamic adaptive system that optimizes performance across different temperature conditions.
Solution Approach 2:
The patent changes the waveform parameter of the drive signal based on temperature conditions. By storing multiple waveform types in the timing controller and selecting the appropriate waveform according to temperature ranges, the system adjusts the drive signal parameters to match operating conditions, thereby reducing operating temperature and brightness attenuation.
2Device complexity
If a fixed waveform drive signal is output, then the control logic is simple, but the service life is short due to accelerated brightness attenuation
Solution Approach 1:
The system dynamically adapts the drive signal waveform based on temperature feedback, extending the service life of the OLED display panel. By switching between DC, negative bias pulse, and positive bias pulse waveforms according to temperature conditions, the system prevents excessive operating temperature that would accelerate aging, thereby extending the operational lifespan of the display.
Solution Approach 2:
The patent implements a feedback mechanism where the temperature sensor continuously monitors the operating temperature and feeds this information to the timing controller. The timing controller uses this feedback to select the appropriate drive waveform, creating a closed-loop control system that actively manages operating temperature to prevent brightness attenuation and extend service life.
3Reliability
If temperature-based waveform switching is implemented, then brightness attenuation is reduced, but the device complexity increases
Solution Approach 1:
The patent segments the temperature operating range into multiple temperature ranges, each associated with a specific drive waveform. By dividing the temperature domain and assigning optimal waveforms to different segments, the system achieves reliable brightness control while keeping the decision logic manageable through clear segmentation of operating conditions.
Solution Approach 2:
The timing controller pre-stores multiple waveform types (DC, negative bias pulse, positive bias pulse) and their corresponding temperature range mappings before operation. This preliminary preparation allows the system to quickly switch between waveforms based on temperature conditions without complex real-time calculations, reducing the actual control complexity while maintaining brightness stability.
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
The solution enhances driving flexibility, reduces brightness attenuation, and extends the service life of OLED display panels by dynamically adjusting drive signals in response to temperature changes.
Implementation Method 1
a temperature sensor, a timing controller, and a source driving circuit; wherein the temperature sensor is connected to the timing controller, and is configured to sense a target temperature and output the target temperature to the timing controller
Data Source
AI summary
Provided is a driving device for a display panel. The driving device includes a temperature sensor, a timing controller, and a source driving circuit. The temperature sensor is connected to the timing controller, and is configured to sense a target temperature and output the target temperature to the timing controller, the target temperature including an operating temperature of the display panel; and the timing controller is further connected to the source driving circuit, the source driving circuit is further connected to a pixel in the display panel, and the timing controller is configured to control, based on the target temperature, the source driving circuit to output a drive signal with a target parameter to the pixel to drive the pixel to emit light; wherein target temperatures within different temperature ranges correspond to drive signals with different target parameters.