Display Device Timing Control for Scan Line RC Load Compensation
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Solution Overview
Problem
In display devices with single-side driving, the non-uniform RC load due to differing scan line lengths leads to data charge rate deviations, resulting in reduced display quality as scan and data signals are not supplied accurately in time.
Innovation Solution
A display device with a timing controller that adjusts the output timing of data signals based on the position of scan lines, using multiple data drivers and line memories to synchronize data signal output with scan signals, thereby controlling the slew rate and reducing charge rate deviations across pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If single-side driving structure is used to minimize non-display region, then bezel width is reduced, but data charge rate deviation increases due to non-uniform RC load
Solution Approach 1:
The patent applies local quality by differentiating data signal output timings based on the specific position of scan lines. Data drivers are controlled to output data signals at different timings according to whether the scan line position is in the first or second direction, thereby compensating for the non-uniform RC load characteristics at different locations in the single-side driving structure.
Solution Approach 2:
The patent changes the timing parameter of data signal output based on scan line position. By adjusting the output timing of data signals from different data drivers according to the position information of scan lines, the patent compensates for the varying RC load effects and maintains uniform data charge rates across all pixels.
2Shape
If scan lines have different lengths, then single-side driving layout is achieved, but RC load uniformity deteriorates
Solution Approach 1:
The patent recognizes that different scan line positions have different RC load characteristics and applies local quality by controlling data drivers to output data signals at position-specific timings. This compensates for the non-uniform RC load caused by varying scan line lengths in the single-side driving layout.
Solution Approach 2:
The timing controller performs preliminary action by determining the position information of scan lines in advance and pre-adjusting the data signal output timings accordingly. This allows data drivers to output data signals at optimized timings that compensate for the non-uniform RC load before the actual pixel driving occurs.
3Device complexity
If data signal output timing is not adjusted, then device complexity is low, but display quality deteriorates due to inaccurate signal timing
Solution Approach 1:
The patent implements feedback by using position information of scan lines to adjust data signal output timings. The timing controller receives position information and uses this feedback to control data drivers, ensuring that data signals are output at accurate timings that compensate for the non-uniform RC load in the single-side driving structure.
Data Source
AI summary
A display device includes: a display unit including a plurality of pixels connected with data lines and scan lines with different lengths; a data driver configured to supply a data signal to the data lines; a scan driver configured to supply a scan signal to the scan lines; and a timing controller controlling the data driver to supply the data signal to the data lines at different output timings according to a position of a scan line to which the scan signal is supplied.