Display Driver Timing Control for Transient Noise Reduction
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Solution Overview
Problem
Display devices experience transient current and interference during initial operation, leading to screen flicker and deterioration of display quality due to simultaneous driving of components like drive IC, scan IC, and power supply.
Innovation Solution
A display device and driving method where the emission driver starts operating before the gate driver, with a power supplier providing power voltage later, minimizing noise and interference by controlling the timing of signal enablements and power supply to prevent initial display quality deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If all components (drive IC, scan IC, power supply) are simultaneously driven at startup, then the display device can be quickly activated, but transient current is generated causing interference and screen flicker
Solution Approach 1:
The emission driver is enabled in advance before the gate driver at startup. The emission driver starts operating first to establish proper voltage levels and minimize transient current effects, then the gate driver is enabled subsequently. This preliminary action of the emission driver prevents interference during the critical startup phase.
2Productivity
If the emission driver and gate driver operate simultaneously, then the display can respond quickly to input signals, but interference between components deteriorates display quality
Solution Approach 1:
The emission driver is enabled before the gate driver to establish stable voltage levels and minimize transient current effects. By preparing the emission driver in advance, the system avoids interference during the critical startup phase while maintaining quick response capability once both drivers are operational.
Solution Approach 2:
The drivers are enabled in a sequential periodic manner rather than simultaneously. The emission driver is enabled first, then after a predetermined time interval, the gate driver is enabled. This periodic sequencing eliminates interference between the drivers during their initialization phase.
3Speed
If the power supply is provided immediately at startup, then the display device reaches full operation quickly, but transient current causes interference and screen flicker
Solution Approach 1:
The emission driver is enabled before the gate driver and power supply is fully activated. This preliminary action allows the emission driver to prepare the display panel in advance, and the power supply is then provided in a controlled manner to minimize transient current effects while maintaining quick power-up speed.
Data Source
AI summary
A display device includes: a display panel including a gate line, an emission signal line, a data line, and a pixel coupled to the gate line, the emission signal line, and the data line; a gate driver configured to provide a gate signal to the gate line; an emission driver configured to provide an emission signal to the emission signal line; a data driver configured to provide a data signal to the data line; and a power supplier configured to provide the display panel with a power voltage for driving the pixel, wherein the emission driver is configured to start operating at a first time point in response to an emission enable signal provided from the data driver, and the gate driver is configured to start operating at a second time point in response to a gate enable signal provided from the data driver.