Liquid Crystal Driver Circuit Data Line Switches for Power Reduction
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Solution Overview
Problem
Large liquid crystal displays in mobile terminals consume excessive power due to non-window regions remaining in an operating state during window display mode, leading to unnecessary power consumption.
Innovation Solution
Implementing a liquid crystal driver circuit with data line switches that toggle between operating and non-operating states based on their intersection with the window region, ensuring only scanning and data lines within the window region are active, while those outside are deactivated, along with a method to control backlight emission accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If all data lines and scanning lines are kept in operating state for a large liquid crystal display, then the display can show content across the entire screen, but power consumption increases excessively
Solution Approach 1:
The patent segments the data lines into two categories: first type data lines corresponding to window region columns and second type data lines corresponding to non-window region columns. By applying different operating states to different segments (types) of data lines, the system reduces power consumption while maintaining display functionality in the window region.
Solution Approach 2:
The patent applies different quality states (operating vs. non-operating) to different regions of the display. Specifically, data lines in the window region (first type) remain in operating state to enable display, while data lines outside the window region (second type) are set to non-operating state to save power, creating local quality differentiation across the display.
2Use of energy by moving object
If data line switches are added to control the operating state of data lines, then power consumption is reduced by deactivating non-window region lines, but device complexity increases
Solution Approach 1:
The patent introduces data line switches as intermediary components between the data driver chip and the data lines. These switches act as mediators that control the connection state (connected or disconnected) of each data line, enabling dynamic power management without requiring fundamental changes to the display architecture.
Solution Approach 2:
The patent implements dynamic control of data line operating states through controllable switches that can transition between connected and disconnected states. This dynamic capability allows the system to adapt power consumption levels based on display requirements, switching second type data lines to non-operating state when not needed.
Data Source
AI summary
A liquid crystal driver circuit may include a screen including a plurality of liquid crystal units distributed as an array. The array may include m rows of liquid crystal units along a row direction, and n columns of liquid crystal units along a column direction, wherein m is an integer and n is an integer. The screen may also include n data lines, respectively connected to the n columns of liquid crystal units along the column direction; and at least one data line switch, each connected to a corresponding data line of the n data lines.