Electrophoresis Display Memory Alternating Write Cycle
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Solution Overview
Problem
Conventional electrophoresis displays require frequent updates of two memories for storing previous and current state images, leading to increased memory writing time and complex driving operations.
Innovation Solution
An electrophoresis display system that alternates memory updates every cycle, using a controller to manage data between a first and second memory, where one memory stores the current state image and the other stores the previous state image, reducing the need for simultaneous updates and utilizing a FIFO buffer to manage timing differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If both memories are updated every k frame periods, then the display can maintain current and previous state images, but the memory writing time increases and driving becomes complicated
Solution Approach 1:
The patent divides the memory update operation into two separate cycles: one for updating the current state image and another for updating the previous state image. By segmenting the update process, the system can perform memory writes in alternating cycles rather than simultaneously, reducing the total writing time while maintaining accurate image data storage.
Solution Approach 2:
The patent performs preliminary actions by pre-loading the current state image into the first memory before the display cycle begins. This allows the previous state image to be automatically retrieved from the second memory without requiring a separate read operation, thereby reducing the driving complexity and time required for memory operations.
2Reliability
If both memories are updated every k frame periods, then the display can maintain current and previous state images, but the driving operation becomes complicated
Solution Approach 1:
The patent segments the memory control into two independent control paths: one for the first memory (current state image) and another for the second memory (previous state image). Each control path operates independently with its own timing signals, simplifying the overall driving operation while ensuring both memories are updated accurately.
Solution Approach 2:
The patent introduces a control block as an intermediary that manages the memory update process. This control block receives timing signals, determines which memory should be updated based on the current cycle, and coordinates the update operations. This intermediary simplifies the driving operation by centralizing the control logic rather than requiring complex simultaneous coordination of both memory updates.
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 approach reduces memory writing time by half and decreases the driving load required for memory operations, simplifying the display's memory management and operation.
Implementation Method 1
If a material having electric charge is placed in an electric field, the material peculiarly moves in accordance with electric charges, the size and shape of molecules and the like. Such a movement, i.e., a phenomenon in which materials are separated by the difference of movement, is named 'Electrophoresis'.
Data Source
AI summary
An electrophoresis display is provided to reduce writing time of a memory. The electrophoresis display includes: an electrophoresis display panel; a first memory and a second memory for alternatively storing a previous state image and a current state image; and a controller sets the first digital data generated by the system as the current state image and stores it alternately in one of the first and second memories every cycle, keeps storing the first digital data previously stored in the other one of the first and second memories in it as the previous state image, compares the current state image and the previous state image, and generates second digital data to be displayed on the electrophoresis display panel by use of waveform information corresponding to the result of the comparison among the plurality of waveform information.