Bistable Display Drive Apparatus Removing Frame Buffer
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Solution Overview
Problem
Traditional drive apparatuses for bistable displays require complex circuit designs and additional memories due to their frame buffer structure, making them unsuitable for applications that do not need fast response times, such as electronic tags.
Innovation Solution
A drive apparatus for bistable displays that includes an initialization unit, a receiving unit, and a display drive unit, which produces and transmits a waveform signal with a pulse width related to the gray level value to drive pixels, allowing the same pixels to have a unified drive structure and eliminating the need for a frame buffer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a frame buffer structure is used to record pixel data of previous images, then the response time is shortened, but the circuit design becomes more complicated and additional memories are required
Solution Approach 1:
The patent removes the frame buffer structure from the drive apparatus, extracting the unnecessary memory component that caused complexity. By eliminating the need to store and compare previous frame data, the system achieves simpler circuit design while maintaining acceptable response performance through direct waveform signal generation based on current gray level requirements
Solution Approach 2:
The drive apparatus is designed with universal applicability for different display scenarios. The waveform signal generation unit can handle various gray levels and display requirements without requiring frame buffer memory, making the circuit design simpler and more versatile for applications like electronic tags where fast response is not critical
2Speed
If a frame buffer structure is used to record pixel data of previous images, then the response time is shortened, but additional memories are required
Solution Approach 1:
The patent eliminates the frame buffer memory component entirely, extracting the unnecessary storage element. The drive apparatus generates waveform signals directly from current gray level data without requiring additional memories to store previous frame information, thereby reducing memory capacity requirements while maintaining functional performance
3Device complexity
If traditional drive apparatus is used, then the circuit design is more complicated, but it is not applicable for applications that do not require fast response time
Solution Approach 1:
The patent simplifies the circuit design by removing the frame buffer structure and its associated complexity. The streamlined drive apparatus with direct waveform signal generation is specifically adapted for applications like electronic tags where complex circuitry is unnecessary and simplicity is preferred
Solution Approach 2:
The patent changes the operational parameters of the drive apparatus by eliminating frame buffer-based operations and using direct gray level to waveform signal conversion. This parameter change makes the system more suitable for low-complexity applications like electronic tags while maintaining adequate performance
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
This solution simplifies the drive structure, reduces power consumption, and enables the same waveform signal to be used for the same target display status regardless of the previous display status, improving performance without requiring additional memory or complex circuitry.
Implementation Method 1
the electronic paper display adopts the principle of an 'electrophoresis' by injecting electrically charged black or white chemical particles and solvents between two pieces of transparent glass or plastic substrates
Implementation Method 2
the positively charged black particles are attracted to flow and show a black color. The positively charged portion attracts the negatively charged fluorocarbon flow to show a white color
Data Source
AI summary
A drive apparatus for a bistable displayer and a method thereof are provided for driving a bistable displayer with a plurality of pixels. The drive apparatus includes an initialization unit, a receiving unit and a display drive unit. The initialization unit is for generating at least one initial potential level to all pixels to perform initialization. The receiving unit is for receiving a plurality of gray levels. The display drive unit generates a waveform signal based on every gray level. The pulse width of the waveform signal relates to the value of the gray level. The waveform signal is then transmitted to a corresponding pixel to drive the pixel to be displayed.