Liquid Crystal Display Black Frame Insertion via Pixel Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current black insertion technologies in 3D liquid crystal displays are complex and power-consuming, failing to effectively address cross talk and image smear issues, particularly at low refresh rates.
Innovation Solution
A liquid crystal display device utilizing N-type Metal Oxide Semiconductor (MOS) transistors with switching elements to control grayscale and reference voltage signals, allowing for simple and power-efficient insertion of black frames by alternately applying control signals to display normal and black frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional timing controller (TCON) is used to output black picture data for black insertion, then cross talk and image smear problems can be reduced, but the system becomes complex and consumes more power
Solution Approach 1:
The patent extracts the black insertion function from the timing controller (TCON) and implements it directly at the pixel level using switching elements. Each pixel unit includes a switching element that can be independently controlled to display black by connecting to a reference voltage, eliminating the need for complex TCON processing of black picture data.
Solution Approach 2:
The pixel units perform the black insertion function themselves through locally controlled switching elements. When a black frame needs to be displayed, the switching elements in each pixel unit automatically connect to the reference voltage to display black, without requiring external TCON intervention to generate and transmit black picture data.
2Reliability
If traditional timing controller (TCON) is used to output black picture data for black insertion, then image smear problem can be reduced, but energy consumption increases
Solution Approach 1:
The patent extracts the black insertion function from the timing controller (TCON) and implements it directly at the pixel level using switching elements. Each pixel unit includes a switching element that can be independently controlled to display black by connecting to a reference voltage, eliminating the need for complex TCON processing of black picture data.
Solution Approach 2:
The pixel units perform the black insertion function themselves through locally controlled switching elements. When a black frame needs to be displayed, the switching elements in each pixel unit automatically connect to the reference voltage to display black, without requiring external TCON intervention to generate and transmit black picture data.
3Productivity
If black insertion is implemented using traditional methods, then refresh rate can be increased to reduce image smear, but device complexity and power consumption increase
Solution Approach 1:
The patent extracts the black insertion function from the timing controller (TCON) and implements it directly at the pixel level using switching elements. Each pixel unit includes a switching element that can be independently controlled to display black by connecting to a reference voltage, eliminating the need for complex TCON processing of black picture data.
Solution Approach 2:
The pixel units perform the black insertion function themselves through locally controlled switching elements. When a black frame needs to be displayed, the switching elements in each pixel unit automatically connect to the reference voltage to display black, without requiring external TCON intervention to generate and transmit black picture data.
Data Source
AI summary
An LCD device includes: multiple data lines, scanning lines, pixel units and switching elements. First terminals of the switching elements are connected together for receiving a control signal. Second terminals of the switching elements are connected together for receiving a reference voltage signal. Third terminal of each switching element is connected to a corresponding data line. When the control signal is a first control signal, each switching element is turned off, grayscale voltage signals are applied on corresponding pixel units, and a normal image frame is displayed. When the control signal is a second control signal, each switching element is turned on, the reference voltage signal is applied on the pixel units, an inserted black frame is displayed. A simple and power-saving way for an inserted black frame is realized to solve the cross talk in 3D display or a serious image smear problem in low refresh rate.