Display Device Test Circuit Pre-Charging Power Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional display devices with small-sized integrated circuits face challenges in pre-charging due to high power consumption and complex time sequences, which affect image display and occupy significant space, especially when using additional circuits for switching signals.
Innovation Solution
A display device design that incorporates a conventional test circuit for pre-charging, utilizing a simplified time sequence and a data driver with a first power line, first transistor, and pre-charge control signal to supply initial voltage to pixels, reducing the need for frequent minimum voltage adjustments and minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional circuits are configured for switching signals to implement pre-charge function, then pre-charge capability is improved, but device area increases significantly
Solution Approach 1:
The test circuit originally designed for testing purposes is made multi-functional by enabling it to perform both testing and pre-charging operations. The test circuit includes a test signal input terminal, a test control signal input terminal, and a test output terminal coupled to the data line, allowing it to supply initial voltage to pixels during pre-charge phase while maintaining its original testing functionality.
Solution Approach 2:
The patent merges the pre-charge function with the existing test circuit rather than implementing a separate pre-charge circuit. The test circuit is configured to receive a pre-charge control signal and supply initial voltage to the data line through the test output terminal, combining multiple functions into a single circuit block to reduce overall device area.
2Area of stationary object
If conventional test circuit is used for pre-charging, then device area is reduced, but power consumption increases due to complex time sequences
Solution Approach 1:
The test circuit supplies initial voltage to the data line in advance before normal data writing operations begin. By performing this pre-charging action preliminarily, the circuit avoids the need for frequent minimum voltage adjustments during subsequent operations, thereby reducing overall power consumption despite the added pre-charge step.
Data Source
AI summary
The present disclosure provides a display device, including: a gate line and a data line; a pixel array; a gate driver, configured to provide a gate signal to the gate line; a test circuit, coupled to a first input line and a second input line respectively; and a data driver, including a first power line, a first transistor and a third input line, wherein the first power line is configured to supply an initial voltage to the pixel array, the first power line is coupled to the first input line via the first transistor, a gate of the first transistor is coupled to the third input line, the third input line is configured to transmit a pre-charge control signal, and the pixel array is configured to supply the initial voltage to each pixel in the pixel array based on the pre-charge control signal.