Display Gate Driver Parallel Scan Signal Output
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Solution Overview
Problem
Display apparatuses face limitations in reducing scanning time, particularly at high resolutions, leading to potential image deterioration and visible flickers when using black frame insertion techniques.
Innovation Solution
A display apparatus with a mode determining unit that operates in either a first mode or a second mode, utilizing a gate driver to simultaneously output scan signals to specific scan lines and a source driver to synchronize data signals, allowing for high-frequency operation and flicker-free black frame insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the display apparatus operates at high resolution, then image quality is improved, but scanning frequency is limited causing image deterioration
Solution Approach 1:
The patent divides the scan lines into two groups: even-numbered scan lines and odd-numbered scan lines. The gate driver simultaneously outputs scan signals to both groups, enabling parallel scanning operations. This segmentation allows the display apparatus to maintain high scanning frequency even at high resolution by processing different scan line groups concurrently, thus resolving the contradiction between image quality and scanning frequency.
2Reliability
If black frames are inserted to reduce motion blur, then motion blur is reduced, but visible flickers occur
Solution Approach 1:
The patent implements periodic black frame insertion where black frames are alternately inserted between even and odd scan line groups. This periodic action allows the display to reduce motion blur through black frame insertion while maintaining high scanning frequency, preventing visible flickers by ensuring that the overall refresh rate remains sufficiently high even with intermittent black frames.
3Reliability
If scanning frequency is increased to prevent image deterioration, then image quality is maintained, but device complexity increases
Solution Approach 1:
The patent merges the scanning operations for even and odd scan line groups by having the gate driver simultaneously output scan signals to both groups. This combining of parallel scanning operations achieves high scanning frequency without requiring separate complete scanning systems, thus maintaining image quality while avoiding excessive device complexity through efficient resource sharing and parallel processing.
Data Source
AI summary
A display apparatus is disclosed. The display apparatus may include a mode determining unit, which determines an operation mode of the display apparatus between a first mode and a second mode; a display unit, which includes n scan lines including first through nth scan lines; data lines; and pixels, wherein a pixel is associated with a respective scan line and a respective data line; a gate driver to output scan signals to the scan lines; and a source driver to output data signals to the data lines in synchronization with the scan signals, wherein the gate driver substantially simultaneously outputs the scan signals to an ith scan line and a (k+i)th scan line among the scan lines in the first mode, and k is a positive integer, n is equal to 2k, and i is a positive integer smaller than or equal to k.