Display Discharge Unit for Residual Image Elimination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional liquid crystal displays (LCDs) suffer from residual images due to untimely discharge of charges when power is suddenly terminated, leading to shortened image retention duration.
Innovation Solution
A discharge unit is integrated into the display system, coupling electric power to a reference voltage when power is suddenly terminated to rapidly discharge remaining charges on pixels, eliminating residual images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional LCD power supply is suddenly terminated, then power consumption is reduced, but charges remain on pixels causing residual images
Solution Approach 1:
A discharge unit is introduced as an intermediary component between the power supply and the display panel. This discharge unit includes a discharge switch and a discharge resistor that activate when power is terminated, providing a controlled path for charges to dissipate from the pixels, thereby eliminating residual images while maintaining energy efficiency.
Solution Approach 2:
The discharge unit is pre-configured in the circuit but remains inactive during normal operation. When power is suddenly terminated, the discharge switch automatically activates to provide a discharge path, performing the necessary charge dissipation action in advance before residual images can persist. This preliminary preparation ensures immediate charge discharge without affecting normal display operation.
2Object-generated harmful factors
If charges are discharged timely, then residual images are eliminated, but additional discharge components are required
Solution Approach 1:
The discharge unit is merged with the existing power supply circuitry, sharing common components such as the power supply unit and control circuits. The discharge switch is integrated into the power supply path, and the discharge resistor is combined with existing circuit elements, thereby achieving charge discharge functionality without significantly increasing device complexity or adding separate independent components.
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
The discharge unit effectively prevents residual images from forming on the display panel by ensuring timely discharge of charges, maintaining image clarity even during sudden power termination.
Implementation Method 1
coupling the electric power to a reference voltage when the electric power is suddenly terminated so as to accelerately discharge charges remaining on the electric power
Data Source
AI summary
A display and a method for eliminating a residual image thereof are provided. The method includes detecting a status of an electric power supplied by a power supply unit of the display when the display is in the power on state; and coupling the electric power to a reference voltage when the electric power is suddenly terminated so as to accelerately discharge charges remaining on the electric power.