LCD Driving Circuit Reducing Source Chip Count via Switched Data Lines
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional liquid crystal display (LCD) driving circuits face challenges in reducing signal charging frequency and power consumption while also minimizing the number of source driving chips, which increases production costs and design complexity.
Innovation Solution
A driving circuit for liquid crystal panels that uses two data lines per column connected to a single source driving chip through switch units, allowing alternating rows to be signaled via different data lines, reducing signal charging frequency and the number of required source driving chips.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If two data lines are set up corresponding to every column with separate source driving chips, then signal charging frequency is reduced and power consumption is cut down, but the number of source driving chips doubles which raises difficulty for manufacture and design
Solution Approach 1:
A single source driving chip is designed to control both the first data line and the second data line, making the chip multi-functional. The chip alternates between driving different data lines in different time periods, thereby reducing the total number of source driving chips needed while maintaining the benefits of reduced signal charging frequency and power consumption
Solution Approach 2:
The patent implements dynamic switching between different data lines using switch units that are controlled in different time periods. This dynamic allocation allows a single source driving chip to serve multiple data lines sequentially, reducing hardware complexity while maintaining energy efficiency
2Speed
If two data lines are set up corresponding to every column with separate source driving chips, then signal charging frequency is reduced, but the number of source driving chips doubles increasing production cost
Solution Approach 1:
The source driving chip is designed with universal functionality to drive multiple data lines (both first and second data lines) through time-division multiplexing. This reduces the number of chips required, lowering production costs while maintaining the reduced signal charging frequency benefit
Solution Approach 2:
The patent merges the functionality of multiple source driving chips into a single chip that controls both data lines. By combining these functions and using shared hardware resources with dynamic switching, the system reduces component count and production cost while achieving the same signal charging frequency reduction
Data Source
AI summary
A driving circuit includes m×n TFT pixel units, a gate driver, a source driver, m scan lines and 2n data lines. Every row of TFT pixel units is connected to a scan line, and the m scan lines are connected to the gate driver which provides m rows of the TFT pixel units with scan signals through the m scan lines. A first data line and a second data line are set up to every column of the TFT pixel units. Odd-numbered rows of the TFT pixel units are connected to the first data line, and even-numbered rows of the TFT pixel units are connected to the second data line. The first and the second data lines are connected to one source driving chip set up in the source driver through a first switch unit and a second switch unit respectively. The driving circuit can reduce power consumption of the LCD panel, decline of number of source driving chips applied, and reduce production cost.