Source Driver Dot Inversion via Channel Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Liquid crystal display (LCD) devices driven by dot inversion suffer from high power consumption and temperature due to the high voltage swing range between positive and negative polarities, which is not effectively addressed by existing technologies.
Innovation Solution
A source driver utilizing multiple driving channels that output data driving voltages of the same polarity during different scan periods to perform dot inversion, reducing power consumption by maintaining a smaller voltage swing range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dot inversion is implemented by switching between positive and negative polarity voltages in each driving channel, then display quality is improved (low cross talk and flicker), but power consumption and temperature increase due to high voltage swing range
Solution Approach 1:
The source driver is divided into multiple driving channels (first driving channel to (N+1)th driving channel) where odd-numbered channels output voltages of first polarity and even-numbered channels output voltages of second polarity. This segmentation allows dot inversion to be achieved through channel alternation rather than polarity switching within each channel, reducing voltage swing range and power consumption while maintaining display quality.
2Reliability
If dot inversion is implemented by switching between positive and negative polarity voltages in each driving channel, then display quality is improved (low cross talk and flicker), but temperature increases due to high voltage swing range
Solution Approach 1:
The source driver is divided into multiple driving channels (first driving channel to (N+1)th driving channel) where odd-numbered channels output voltages of first polarity and even-numbered channels output voltages of second polarity. This segmentation allows dot inversion to be achieved through channel alternation rather than polarity switching within each channel, reducing voltage swing range and power consumption while maintaining display quality.
3Use of energy by moving object
If column inversion or frame inversion is used instead of dot inversion, then power consumption is reduced, but display quality deteriorates (increased cross talk and flicker)
Solution Approach 1:
The source driver is divided into multiple driving channels (first driving channel to (N+1)th driving channel) where odd-numbered channels output voltages of first polarity and even-numbered channels output voltages of second polarity. This segmentation allows dot inversion to be achieved through channel alternation rather than polarity switching within each channel, reducing voltage swing range and power consumption while maintaining display quality.
Data Source
AI summary
A source driver, a display device and a driving method of the source driver are disclosed. The source driver adapted to a display panel includes a plurality of driving channels, wherein the display panel includes N pixel cells on each of a plurality of scan lines. The 1st driving channel to the Nth driving channel respectively drive the N pixel cells on a first scan line of the scan lines during a first scan period and the 2nd driving channel to the (N+1)th driving channel respectively drive the N pixel cells on a second scan line of the scan lines during a second scan period. When polarity inversion is performed on the display panel, each driving channel is responsible for outputting a data driving voltage with a certain polarity to the corresponding pixel cell during different scan periods. Therefore, the power consumption of the source driver can be decreased.