Display Device Charging Control via Horizontal Idle Period Adjustment
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Solution Overview
Problem
Large ultra-high definition display devices with 8k resolution and 120 Hz operation experience a deterioration in charging rates of pixel columns far from the source driver, leading to significant differences between the upper and lower halves of the screen due to resistance-capacitance consumption and delay in metal wiring data signal transmission.
Innovation Solution
A display device comprising a timing controller, data register, and source driver that modulates the horizontal idle period to extend charging times, ensuring that the N/2th to Nth horizontal idle periods are greater than the first horizontal idle period, thereby distributing increased charging time evenly across pixel columns to reduce disparities between the upper and lower halves of the screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the display device uses metal wirings to transmit data signals inside panels, then the display device can achieve high resolution and high refresh rate, but the charging rate of pixel columns far from the source driver deteriorates due to resistance-capacitance consumption and delay
Solution Approach 1:
The patent applies local quality by differentiating the horizontal idle period durations based on the position of pixel columns. Specifically, the horizontal idle period is extended for pixel columns far from the source driver (N/2th to Nth horizontal idle periods) compared to those near the source driver. This localized adjustment compensates for the increased resistance-capacitance consumption and signal delay in distant pixel columns, ensuring uniform charging rates across the entire display panel while maintaining high resolution and refresh rate performance.
2Productivity
If the display device operates at 120 Hz with 8k resolution, then the display device achieves high refresh rate and high definition, but the charging rate difference between upper half screen and lower half screen becomes significant
Solution Approach 1:
The patent implements dynamics by making the horizontal idle period adjustable and position-dependent. The timing controller dynamically sets different horizontal idle period durations based on the pixel column's position within the display panel. For pixel columns in the second half (N/2th to Nth horizontal idle periods), the idle period is extended to compensate for cumulative resistance-capacitance effects, thereby achieving uniform charging rates across all pixel columns while maintaining 120 Hz refresh rate operation at 8k resolution.
Data Source
AI summary
The present invention provides a display device. The display device includes a timing controller, a data register, a source driver, and a display panel. A portion of a vertical effective display column data in a vertical idle period is output through the data register, which can increase a sum of charging time of a pixel column of an entire frame of images. Moreover, an N/2th horizontal idle period to the Nth horizontal idle period are adjusted to improve display uniformity of an upper half screen and a lower half screen.