Voltage Level Shifting Circuit for Display Power Reduction
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Solution Overview
Problem
Display devices requiring high driving voltage levels consume significant power, and existing technologies have not effectively addressed this issue to reduce power consumption while maintaining display performance.
Innovation Solution
The implementation of a display device with a pixel array, data lines, and gate lines, where a voltage level shifting circuit is integrated between switch circuits and display units to adjust the voltage level of data driving signals, allowing for lower voltage generation from the data driving circuit and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high driving voltage level is used to drive the display unit, then the display performance is maintained, but the power consumption increases significantly
Solution Approach 1:
The voltage level shifting function is segmented into two parts: a first voltage level shifting circuit in the pixel unit and a second voltage level shifting circuit in the data driving circuit. This segmentation allows the data driving circuit to operate at lower voltage while still providing the high voltage required by the display unit, thus reducing power consumption while maintaining display performance.
Solution Approach 2:
The first voltage level shifting circuit in the pixel unit acts as an intermediary between the data driving circuit and the display unit. It receives low-voltage signals from the data driving circuit and converts them to the high-voltage signals required by the display unit, enabling the system to operate efficiently at lower voltage levels while maintaining the necessary driving voltage for display performance.
2Use of energy by moving object
If voltage level shifting circuit is added to adjust voltage levels, then power consumption is reduced, but device complexity increases
Solution Approach 1:
The first voltage level shifting circuit is merged into the pixel unit structure, combining multiple functions (voltage level shifting and pixel driving) into a single integrated circuit. This reduces the need for separate voltage level shifting circuits for each pixel, thereby reducing overall device complexity while still achieving power consumption reduction through voltage level adjustment.
Data Source
AI summary
A display device includes a pixel array, multiple data lines, and multiple gate lines. The pixel array includes multiple pixel units. The data lines are coupled to the pixel array. The gate lines are coupled to the pixel array. One of the pixel units includes a switch circuit, a display unit, and a first voltage level shifting circuit. The switch circuit is coupled to one of the data lines and one of the gate lines. The first voltage level shifting circuit is coupled between the switch circuit and the display unit and configured to adjust the voltage level of a data driving signal provided by the data line to the display unit.