Display Timing Controller Adjusting Scan Pulse Width
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Solution Overview
Problem
Display devices face a trade-off between response characteristics and flicker characteristics, which are influenced by voltage intensity, particularly in liquid crystal display devices that require a separate backlight and OLED/QLED devices that emit light on their own.
Innovation Solution
A display device with a display panel that includes pixels, data and gate lines, a data driver, a gate driver, and a timing controller, where the timing controller adjusts the pulse width of scan signals when switching from a black frame to a gray frame, improving both response characteristics and flicker characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If voltage intensity is increased to improve response characteristics, then response speed is improved, but flicker characteristics deteriorate
Solution Approach 1:
The patent applies dynamics by making the scan signal pulse width adjustable rather than fixed. The timing controller dynamically changes the pulse width based on the specific driving conditions (black frame to gray frame transition), allowing optimization of both response speed and flicker characteristics simultaneously.
Solution Approach 2:
The patent changes the parameter of scan signal pulse width to resolve the contradiction. By adjusting this temporal parameter differently for different frame transitions, the system achieves improved response characteristics without deteriorating flicker characteristics.
2Speed
If scan signal pulse width is extended to improve response characteristics, then response speed is improved, but power consumption increases
Solution Approach 1:
The patent applies local quality by providing different pulse width durations for different types of frame transitions. Specifically, a longer pulse width is applied only when transitioning from black frame to gray frame (where response speed is critical), while standard or shorter pulse widths are used for other transitions, thereby optimizing power consumption overall.
Solution Approach 2:
The system dynamically adjusts pulse width based on actual driving conditions rather than using a constant value, allowing the display to consume less power during transitions that don't require enhanced response characteristics.
Data Source
AI summary
A display device includes a display panel including pixels, data lines and gate lines; a data driver connected to the data lines; a gate driver connected to the gate lines; and a timing controller configured to control the data driver and the gate driver, wherein when a frame of the display panel has switched from a black frame to a gray frame, the timing controller is configured to output a scan signal having an adjusted pulse width for a gray frame immediately subsequent to the black frame.