Display Panel Polarity Inversion Driving Circuit
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Solution Overview
Problem
Existing liquid crystal display (LCD) technologies face issues with high power consumption and display imperfections like crosstalk, particularly in dot inversion, column 2-dot inversion, and row 2-dot inversion driving methods, which compromise energy efficiency and image quality.
Innovation Solution
Implementing a display panel with a scan drive circuit and data drive circuit that alternate between two polarity inversion driving phases within an image scan period, ensuring non-adjacent rows of pixel units are scanned and driven with opposite polarities, mimicking the efficiency of column inversion while achieving a similar display effect to dot inversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dot inversion driving method is used to achieve good display effect, then display quality is improved, but power consumption increases
Solution Approach 1:
The patent segments the pixel array into multiple groups (e.g., first group, second group, third group, fourth group) and applies different polarity inversion strategies to each group. Instead of inverting polarity for every row (dot inversion), the patent groups rows together and inverts polarity at the group level, reducing the frequency of polarity changes while maintaining display quality through selective grouping and timing.
2Reliability
If polarity inversion frequency is increased to improve display effect, then display quality is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic polarity inversion at the group level rather than continuous row-level inversion. By defining specific time periods for each group and inverting polarities periodically based on group completion rather than row completion, the system reduces the overall frequency of polarity changes while maintaining the necessary inversion effect for display quality.
3Use of energy by moving object
If column inversion driving method is used to reduce power consumption, then power consumption is reduced, but display effect deteriorates
Solution Approach 1:
The patent applies different polarity inversion characteristics to different groups of pixels based on their local requirements. By segmenting the array into multiple groups and allowing each group to have its own timing and inversion pattern, the system achieves locally optimized display quality while globally reducing power consumption compared to uniform dot inversion.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces power consumption while maintaining a high display quality by minimizing the number of polarity changes per column, achieving the same display effect as dot inversion with the lower power consumption of column inversion.
Implementation Method 1
The main principle of LCD is to control alignments of liquid crystal molecules to change light transmittance by use of an electric field
Implementation Method 2
control alignments of liquid crystal molecules to change light transmittance by use of an electric field
Data Source
AI summary
The disclosure relates to a display panel, a display device, and related driving method. The display panel comprises: an array of pixel units comprising at least a plurality of rows of first pixel units and a plurality of rows of second pixel units; a scan drive circuit configured to scan the plurality of rows of the first pixel units in a first polarity inversion driving phase, and scans the plurality of rows of the second pixel units in a second polarity inversion driving phase; and a data drive circuit configured to change polarities of data drive signals applied to the plurality of rows of the first pixel units and the plurality of rows of the second pixel units in the first polarity inversion driving phase and the second polarity inversion driving phase, respectively.