LCD Rotation Driving Method for Thinner Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional liquid crystal display (LCD) devices face challenges in maintaining efficient image display and low power consumption as they become thinner, particularly when driving circuits are positioned at the upper portion of the panel, which is not suitable for thinner designs, and require adjustments in signal output and data arrangement to maintain image quality after rotation.
Innovation Solution
A rotation driving method for LCD devices involves rotating the device 180 degrees, rearranging the source driving units to the lower portion, reversing the output order of scan signals, reestablishing image data, shifting and rearranging image data for odd and even horizontal lines, and exchanging data between sub-pixels to synchronize with scan signals, allowing for normal image display without additional elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the source driving units are disposed at the upper portion of the liquid crystal panel, then the device can be manufactured with conventional structures, but the device cannot achieve thinner design and the driving circuits occupy excessive space
Solution Approach 1:
The patent applies inversion by rotating the liquid crystal display device 180 degrees and reversing the conventional arrangement of driving circuits. The source driving units that were traditionally positioned at the upper portion are moved to the lower portion, and the gate driving units are repositioned to the side portion. This inverted arrangement allows the device to achieve thinner overall thickness while maintaining all necessary driving functions, directly resolving the contradiction between device thickness and driving circuit arrangement complexity.
2Loss of energy
If the data lines are zigzag connected to sub-pixels, then power consumption is reduced in dot-inversion mode, but the image data input sequence becomes complex and requires precise synchronization
Solution Approach 1:
The patent applies preliminary action by pre-rearranging the image data in the timing control unit before it is sent to the source driving units. The data rearrangement unit reorders the image data according to the inverted driving circuit arrangement, ensuring that the zigzag-connected data lines receive data in the correct sequence. This preliminary data preparation simplifies the synchronization process and maintains the power-saving benefits of zigzag connections without introducing excessive complexity.
3Length of moving object
If the device is rotated 180 degrees to reposition driving units, then thinner design is achieved, but the scan signal output order must be reversed to maintain image quality
Solution Approach 1:
The patent applies dynamics by making the scan signal output order adjustable and adaptive. The timing control unit dynamically reverses the scan signal output sequence to match the inverted physical arrangement of driving circuits after rotation. This dynamic adjustment ensures that regardless of the physical orientation, the scan signals always reach the appropriate driving units in the correct sequence, maintaining ease of operation and image quality while enabling thinner device design.
Data Source
AI summary
A rotation driving method of a LCD device includes a first step of rotating the LCD device 180° such that source driving units are disposed at a lower portion of the liquid crystal panel, a second step of outputting scan signals from gate driving units in reverse order, a third step of reestablishing image data provided to the source driving units, a fourth step of reversing arrangement of the image data outputted to sub-pixels, a fifth step of shifting and outputting the image data corresponding to selected odd horizontal lines and even horizontal lines by one sub-pixel, a sixth step of exchanging the image data for the first and third sub-pixels with each other, and a seventh step of outputting the image data rearranged by the third to sixth steps to the liquid crystal panel such that the image data synchronize with the scan signals according to the second step.