Pen Display Handwriting Data Processing Wireless Delay
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Solution Overview
Problem
Conventional pen displays experience delays in handwriting display due to low bandwidth wireless communication, resulting in prolonged data transmission times and a suboptimal user experience.
Innovation Solution
A method where the data processing device compresses screen images and transmits them separately from the uncompressed handwriting data to the pen display, reducing processing time and enhancing display refresh rates by minimizing the data the pen display needs to compress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the pen display transmits complete screen images via wireless communication, then the display completeness is improved, but the transmission time and processing delay increase significantly
Solution Approach 1:
The complete screen image data is segmented into two parts: handwriting data and background image data. The handwriting data is transmitted separately and prioritized over the background image data. This segmentation allows the system to maintain display completeness while reducing the critical transmission delay for handwriting rendering, as the smaller handwriting data portion can be transmitted and displayed more quickly.
Solution Approach 2:
The handwriting data is extracted from the complete screen image and transmitted separately from the background image data. This extraction enables the handwriting portion to be processed and displayed independently with higher priority, reducing the overall perceived delay for handwriting feedback while the background image is transmitted and displayed subsequently.
2Quantity of substance
If the pen display compresses screen images before transmission, then the transmission bandwidth requirement is reduced, but the processing time at the pen display increases
Solution Approach 1:
The compression of screen image data is performed in advance at the data input end device before transmission to the pen display. This preliminary compression reduces the data size that needs to be transmitted wirelessly, and the pen display receives pre-compressed data that requires minimal additional processing, thereby reducing the processing time delay at the display device.
Solution Approach 2:
The data input end device acts as an intermediary that performs the compression function before data transmission. Instead of the pen display performing compression (which would add to its processing burden and delay), the compression is mediated by the data input end device, allowing the pen display to focus on decompression and display with reduced processing time.
3Ease of operation
If the pen display uses wireless communication for data transmission, then the convenience of use is improved, but the bandwidth limitation causes increased transmission delay
Solution Approach 1:
The data transmission is segmented into priority levels: handwriting data is transmitted with high priority and smaller data volume, while background image data is transmitted with lower priority. This segmentation allows the system to maintain wireless convenience while optimizing the transmission speed for critical handwriting feedback, reducing the perceived delay despite bandwidth limitations.
Solution Approach 2:
The system changes the parameter of data prioritization, treating handwriting data differently from background image data in terms of transmission priority and timing. By adjusting these transmission parameters, the system maintains wireless convenience while improving the effective transmission speed for the most time-critical data (handwriting), thereby reducing overall delay.
Data Source
AI summary
A handwriting data processing method is applied to a pen display having wireless communication function and a data processing device. The handwriting data processing method includes the steps of: the data processing device obtaining a handwriting data from the pen display in a wireless communication manner; the data processing device generating a compressed screen image and transmitting the data of the compressed screen image and the handwriting data, which is not compressed, to the pen display in the wireless communication manner; the pen display uncompressing the data of the compressed screen image and overlapping the uncompressed screen image and the handwriting data to form a complete screen image and displaying the complete screen image. By the handwriting processing method, the machine time of the processor of the pen display is effectively lowered, significantly reducing the delay phenomenon of the displayed handwriting.