Display Apparatus Frame Period Segmentation for Pre-Charging
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Solution Overview
Problem
Conventional LCD display technologies face a reduction in image contrast and quality due to the time required for additional functions like pre-charging, which reduces the effective time for writing row data and charging pixels.
Innovation Solution
A display apparatus and driving method that allocate time for simultaneously driving gate and source lines during a functional sub-period of a frame period, allowing additional functions to be performed without sacrificing charging time, by dividing the frame period into functional and scan sub-periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional functions like pre-charging are added to the timing budget, then the functional capability of the display apparatus is improved, but the effective time length for writing row data into the display panel is reduced, which reduces image contrast and quality
Solution Approach 1:
The frame period is divided into two distinct sub-periods: a functional sub-period for performing additional functions (pre-charging, charge-sharing) and a scan sub-period for normal scanning operations. This segmentation allows each sub-period to be optimized independently, ensuring that additional functions do not encroach on the time required for data writing and pixel charging, thereby maintaining image quality while enhancing functional capability.
Solution Approach 2:
Additional functions such as pre-charging are performed during the functional sub-period before the scan sub-period begins. By completing these preparatory actions in advance during the dedicated functional sub-period, the patent ensures that the subsequent scan sub-period can focus entirely on data writing and pixel charging without time pressure, thus preserving image quality while enabling enhanced functionality.
2Adaptability or versatility
If the time length TL1 of driving each gate line is divided into pre-charging period and data driving period, then the pre-charging function is achieved, but the effective time length for data writing is significantly reduced
Solution Approach 1:
The patent segments the frame period into a functional sub-period dedicated to pre-charging and other additional functions, and a scan sub-period dedicated to normal scanning and data writing. This temporal segmentation ensures that the pre-charging function is achieved without reducing the effective time length for data writing, as both functions are performed in separate, non-overlapping time intervals.
Solution Approach 2:
Instead of dividing the time length TL1 of each gate line driving cycle (one-dimensional time allocation), the patent introduces a new dimension by creating parallel time tracks: the functional sub-period for additional functions and the scan sub-period for normal operations. This dimensional change allows multiple functions to coexist without competing for the same time resources, thereby achieving pre-charging while maintaining sufficient data writing time.
3Adaptability or versatility
If the frame rate stays unchanged and pre-charging function is performed, then the functional capability is improved, but the time spent on charging the pixels is reduced, which reduces image contrast
Solution Approach 1:
By segmenting the frame period into functional and scan sub-periods, the patent ensures that pixel charging occurs entirely within the scan sub-period without being compressed or reduced in duration. The frame rate remains unchanged because the total frame period duration is maintained, while the functional sub-period performs pre-charging and other additional functions. This segmentation preserves the time required for proper pixel charging and maintains image contrast while enabling enhanced functionality.
Data Source
AI summary
A display apparatus and a driving method of the same are provided. The display apparatus includes a display panel, a gate driver circuit, and a source driver circuit. During a functional sub-period of a frame period, the gate driver circuit simultaneously drives a plurality of gate lines, and the source driver circuit drives a plurality of source lines, so as to perform a function on a plurality of pixels connected to the gate lines. In a scan sub-period of the frame period, the gate driver circuit drives the gate lines according to a scan sequence, and the source driver circuit correspondingly drives the source lines according to the scan sequence of the gate driver circuit in the first scan sub-period, so as to display an image.