Liquid Crystal Display Serial Data Selection Circuit
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Solution Overview
Problem
Conventional memory liquid crystal display devices face limitations in increasing the number of pixels that can maintain a high screen rewriting frequency due to the use of a single serial data line, which restricts the number of pixels that can be effectively displayed.
Innovation Solution
The implementation of a liquid crystal display device with a serial data selection circuit and serial-parallel conversion circuit that allows for the processing of multiple serial data lines in parallel, enabling the conversion of serial data into parallel data within a single clock pulse, thereby increasing the number of pixels that can be handled.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single serial data line is used for data transmission, then the device size is reduced and power consumption is lowered, but the screen rewriting frequency decreases when the number of pixels increases
Solution Approach 1:
The patent divides the data transmission system into multiple serial data lines (first serial data line and second serial data line) to simultaneously transmit different sets of image data. This segmentation allows parallel processing of multiple data streams, thereby increasing the screen rewriting frequency without significantly increasing overall system complexity
Solution Approach 2:
The patent transitions from single-dimensional serial transmission to multi-dimensional parallel serial transmission by utilizing multiple serial data lines operating simultaneously. This dimensional expansion enables the system to handle more pixels at higher rewriting frequencies while maintaining the efficiency benefits of serial transmission
2Productivity
If multiple serial data lines are provided for parallel data processing, then the screen rewriting frequency increases, but the device size and complexity increase
Solution Approach 1:
The patent combines multiple serial data transmission paths into a unified display output system, where multiple serial data lines converge to drive the same pixel array. This merging approach allows parallel data processing to increase rewriting frequency while avoiding proportional increases in device size, as the output infrastructure is shared
Solution Approach 2:
The display drive circuit is designed to handle multiple serial data lines through a universal interface that can process data from either the first or second serial data line. This multi-functionality allows the system to maintain flexibility and adaptability while efficiently utilizing the available transmission channels without requiring separate dedicated circuits for each data line
Data Source
AI summary
A plurality of pieces of serial data are supplied to a liquid crystal display device from an outside. An SI signal selection circuit switches processing target data to be captured between one piece of serial data included in the plurality of pieces of serial data and the plurality of pieces of serial data in accordance with a serial data selection signal. The processing target data captured by the SI signal selection circuit is converted into parallel data by a data conversion circuit. In accordance with one clock pulse of a serial clock, serial-parallel conversion processing is performed in parallel on a plurality pieces of serial data.