Charge-Share Switch Segmentation for Display Driver Power Reduction
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Solution Overview
Problem
As display devices increase in size, the power consumption and heat generation in data driver devices, particularly in charge-share switches, rise due to decreased load resistances and increased load capacitances in display panels, leading to inefficiencies in power management.
Innovation Solution
A data driver device is designed with a plurality of first and second charge-share switches, where the second charge-share switches are connected between adjacent data lines, allowing for the formation of electrical paths during charge sharing, which reduces the power consumption and heat generation by dividing the charge-share current.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the display device size increases, then the display area is improved, but the power consumption in charge-share switches increases
Solution Approach 1:
The charge-share switch is divided into multiple sub-switches (first charge-share switches and second charge-share switches) that operate in parallel. This segmentation distributes the total charge-share current across multiple smaller current paths, reducing the current through each individual switch and thereby reducing power consumption (P=I²R) in each switch while maintaining the overall charge-sharing function for the larger display area.
2Use of energy by stationary object
If the load resistance is decreased, then the power consumption of the display panel is reduced, but the power consumption in the data driver device increases
Solution Approach 1:
The data driver device uses multiple charge-share switches (first and second charge-share switches) connected in parallel between the share line and data lines. This segmentation allows the device to handle higher total current requirements caused by decreased load resistance while keeping individual switch currents lower, thus reducing power consumption and heat generation in the data driver device itself.
3Reliability
If the load capacitance is increased, then the display panel performance is improved, but the power consumption in charge-share switches increases
Solution Approach 1:
Multiple charge-share switches are used in parallel to distribute the current required for charging the increased capacitance. The segmentation of current paths reduces the current burden on each switch, allowing the system to handle higher load capacitance while maintaining acceptable power consumption levels in individual switches.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration reduces power consumption and heat generation in charge-share switches, enhancing power management efficiency during charge sharing in display panels.
Implementation Method 1
a plurality of first charge-share switches, respectively connected between a share line and a plurality of data lines; a plurality of second charge-share switches, respectively connected between two adjacent data lines
Data Source
AI summary
A data driver device and a display device, in which the data driver device includes a plurality of data lines; a plurality of first charge-share switches connected between a share line and the plurality of data lines, respectively; and a plurality of second charge-share switches each connected between two adjacent data lines among the plurality of data lines.