Display Panel Drive Circuit for Extended Sub-Field Data Writing
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Solution Overview
Problem
The insufficient writing time of pixel driver data in high-frequency liquid crystal displays using color field sequence display mode results in reduced display brightness and gamut due to the short sub-field sequence duration.
Innovation Solution
A drive method that temporarily stores pixel driver data into storage capacitors during backlight luminescent periods of previous sub-field sequences, allowing data to be written into liquid crystal capacitors during data writing periods, thereby extending the data writing time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If pixel driver data is written into the liquid crystal display panel during the sub-field sequence, then the color field sequence display can be realized, but the writing time is insufficient when the sub-field sequence frequency is several times of the refresh frequency
Solution Approach 1:
The patent applies preliminary action by writing pixel driver data into a storage capacitor before the actual display period. The data is pre-loaded into the storage capacitor during the previous frame's backlight luminescent period, so that when the current frame's data writing period arrives, the data is already ready and can be quickly transferred to the liquid crystal capacitor without occupying the brief sub-field sequence time.
2Productivity
If the writing process of pixel driver data is performed during the sub-field sequence, then the data can be displayed, but the time of turning on of the backlight is shortened, thus affecting the overall display brightness and gamut
Solution Approach 1:
The patent performs the data writing operation in advance during the previous frame's backlight luminescent period, storing the data in a storage capacitor. This preliminary action allows the backlight to remain on for the full duration of the current frame without being interrupted by data writing operations, thereby maintaining display brightness and gamut.
Solution Approach 2:
The patent introduces a storage capacitor as an intermediary component between the data source and the liquid crystal capacitor. This intermediary allows data to be stored temporarily and transferred at the appropriate time, separating the data writing process from the backlight luminescent period and enabling both operations to proceed without interfering with each other.
Data Source
AI summary
The present application relates to the field of a display technology, and provides a drive method and a drive circuit of a display panel, and a display device; the display panel includes a plurality of pixel units, each of the plurality of pixel units corresponds to a storage capacitor and a liquid crystal capacitor; a time required for displaying each frame image through the display panel includes a first sub-field sequence, a second sub-field sequence, and a third sub-field sequence in sequence, and each sub-field sequence comprises a data writing period and a backlight luminescent period in sequence.