Display Apparatus Flexible Circuit Board Signal Integrity
Solution Overview
Problem
Conventional liquid crystal displays using the multi-drop method experience signal distortions and voltage drops due to increased resistance in signal lines, leading to deteriorated display quality, especially as the number of data driving ICs increases.
Innovation Solution
The implementation of a flexible printed circuit board with multiple data driving chips mounted on both the panel and the peripheral area, utilizing a point-to-point connection method to directly receive and convert image data into data voltages, reducing the number of chips on the panel and minimizing signal line resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the multi-drop method is used to connect the timing controller to data driving ICs, then the device complexity is reduced, but signal distortions and voltage drops increase due to increased resistance in the signal line
Solution Approach 1:
The patent divides the data driving ICs into multiple groups, with each group connected to the timing controller through a separate signal line. This segmentation reduces the number of ICs per signal line, thereby reducing resistance and signal distortions while maintaining manageable device complexity through organized grouping
2Area of stationary object
If the number of data driving ICs increases, then the display area coverage is improved, but signal distortions and voltage drops are exacerbated
Solution Approach 1:
By segmenting the data driving ICs into multiple groups connected via separate signal lines, the patent enables coverage of larger display areas while maintaining signal quality in each segment, preventing the exacerbation of signal distortions that would occur with a single long signal line
3Length of stationary object
If the length of the signal line increases, then the distance between timing controller and data driving ICs is covered, but resistance in the signal line increases
Solution Approach 1:
The patent divides the long signal line into multiple shorter signal lines, each serving a group of data driving ICs. This segmentation reduces the length of each individual signal line, thereby reducing resistance and maintaining electrical conductivity while still covering the required distance through multiple parallel connections
Data Source
AI summary
A display apparatus includes a display panel, a flexible printed circuit board, a first data driver, and second data driver. The display panel includes a display area in which an image is displayed in response to a data voltage and a peripheral area adjacent to the display area. The flexible printed circuit board is attached to the peripheral area and includes a plurality of flexible circuit lines. The first data driver is mounted on the flexible printed circuit board to directly receive image data through a part of the flexible circuit lines and convert the image data into the data voltage. The second data driver is mounted on the peripheral area to directly receive the image data through a remaining part of the flexible circuit lines and convert the image data into the data voltage.