Shift Register Flip-Flop Memory Circuit for Display Area
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional memory liquid crystal displays have a relatively small display area due to the presence of gate and source drivers, which hinders size reduction and increases power consumption.
Innovation Solution
A display device with a shift register comprising flip-flops connected in series, voltage selection portions, and display element portions, allowing data to be transferred and stored without the need for traditional driver circuits, thereby reducing circuit area and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If gate driver and source driver are provided in conventional memory liquid crystal displays, then the display device can hold data in memory for low power consumption, but the circuit area increases and display area proportion decreases
Solution Approach 1:
The invention extracts and removes the gate driver and source driver from the conventional memory liquid crystal display configuration. By eliminating these driver circuits, the patent achieves both reduction in circuit area and maintenance of low power consumption through the memory function, directly resolving the technical contradiction between power consumption and circuit area.
2Use of energy by stationary object
If gate driver and source driver are provided in conventional memory liquid crystal displays, then the display device can hold data in memory for low power consumption, but the proportion of display area in the entire panel becomes small
Solution Approach 1:
The invention extracts and removes the gate driver and source driver from the conventional memory liquid crystal display configuration. By eliminating these driver circuits, the patent achieves both reduction in circuit area and maintenance of low power consumption through the memory function, directly resolving the technical contradiction between power consumption and circuit area.
3Area of stationary object
If flip-flops are connected in series to form a shift register, then the circuit area is reduced by eliminating driver circuits, but data must be sequentially transferred which may affect writing speed
Solution Approach 1:
The invention employs periodic clock signals to control the sequential operation of flip-flops in the shift register. Data is written in batches corresponding to display refresh cycles, with each clock pulse advancing one bit of data through the chain. This periodic action allows efficient use of the sequential architecture while maintaining compatibility with display refresh rates, resolving the contradiction between circuit area reduction and data writing speed.
Data Source
AI summary
In a pixel memory portion of a display device, as corresponding to each pixel memory unit, there are provided a flip-flop, a voltage selection portion, which selects either white display voltage or black display voltage in accordance with an output signal from the flip-flop, and a liquid crystal capacitance, which reflects the voltage selected by the voltage selection portion in the display state of the pixel that corresponds to the flip-flop. Moreover, the flip-flops respectively included in the pixel memory units within the pixel memory portion are connected in series, forming a shift register.