Smart Tablet Backlight Synchronization for Writing Delay
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Solution Overview
Problem
Current electronic whiteboards face delays in handwriting display due to frame caching and synchronization issues between image and backlight data, affecting display quality and user experience.
Innovation Solution
A data processing apparatus with multiple operation modes, including a writing mode that calculates and outputs first backlight data based on touch position information without waiting for frame image data, ensuring synchronous output of image and backlight data, and a non-writing mode that caches and compensates image data according to calculated backlight data for improved display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If frame caching and synchronization are used to ensure display quality, then image quality is improved, but display delay increases
Solution Approach 1:
The system dynamically switches between two operation modes: writing mode for real-time handwriting display and non-writing mode for high-quality image display. This dynamic adaptation allows the system to optimize for either low delay or high quality depending on the current operational context, resolving the contradiction between display quality and display delay.
Solution Approach 2:
The system changes operational parameters (backlight data generation method, image data processing method) based on the current mode. In writing mode, backlight data is generated in real-time from touch position information without waiting for frame image data. In non-writing mode, the system uses frame caching and compensation methods. This parameter change allows the system to achieve both low delay and high quality under different conditions.
2Manufacturing precision
If backlight data is calculated after receiving frame image data, then display quality is improved, but synchronization between image and backlight data deteriorates
Solution Approach 1:
In writing mode, the system performs preliminary action by generating backlight data immediately from touch position information before the frame image data is ready. This preliminary generation of backlight data ensures that when the image data arrives, the backlight is already prepared, maintaining synchronization without compromising display quality.
Solution Approach 2:
The system uses feedback from touch position information to generate backlight data in real-time. The backlight data selection circuit selects appropriate backlight data based on the touch position, ensuring that the backlight synchronization with the displayed content is maintained even when frame image data is not yet available.
3Manufacturing precision
If frame caching is used for image data processing, then image quality is improved, but productivity decreases
Solution Approach 1:
The system segments the display operation into different modes (writing mode and non-writing mode) with different processing requirements. In writing mode, minimal caching is used for immediate display, while in non-writing mode, frame caching is applied for high-quality images. This segmentation allows the system to maintain high processing speed when needed while achieving high quality when appropriate.
Solution Approach 2:
The system applies partial caching action only when necessary. In writing mode, the system processes and displays data with minimal delay. In non-writing mode, the system applies full frame caching and compensation. This partial application of caching ensures that productivity is not unnecessarily reduced while still achieving high display quality when needed.
Data Source
AI summary
A data processing apparatus has an operation mode including a first mode; in the first mode: an image data receiving circuit in the data processing apparatus is configured to receive first image data sent by a main board; a touch information receiving circuit is configured to receive touch position information; a position analysis circuit is configured to acquire backlight division information corresponding to the touch position information, according to the touch position information, to obtain first backlight data; a backlight data selection circuit is configured to select and output the first backlight data to a backlight-source-to-be-driven; and an image data selection circuit is configured to output first compensated image data to a display-panel-for-displaying; where the first compensated image data are data obtained by compensating the first image data according to the first backlight data.