Touch Display Control Device Reducing Latency via Segmented Processing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices experience lag between touch input and display response due to long signal transmission paths, leading to a poor user experience during writing or editing tasks.
Innovation Solution
A touch and display control device that includes a touch screen controller and a display driver, where the touch screen controller generates touch raw data and extracts coordinate and attribute information, and the display driver accumulates this information to generate touch trajectory data, internally creating a touch image to be displayed with the original image, reducing the need for host processor involvement and minimizing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If touch input signals are transmitted through the host processor for processing, then the display device can maintain a simple control structure, but the signal transmission path becomes long causing lag and poor touch responsiveness
Solution Approach 1:
The patent segments the control device into two independent modules: a touch screen controller that processes touch inputs locally, and a display driver that receives both touch data and image data. This segmentation eliminates the need for host processor involvement in touch processing, reducing signal transmission path length and improving touch responsiveness while maintaining overall system simplicity.
Solution Approach 2:
The patent introduces an intermediary mechanism where the touch screen controller directly transmits touch coordinate data to the display driver through a dedicated data transmission path. This intermediary connection bypasses the host processor for touch-related operations, reducing processing delays while the host processor continues to handle image data transmission independently.
2Device complexity
If touch processing is handled by the host processor, then the control device can have fewer components, but power consumption increases due to continuous processor operation
Solution Approach 1:
The patent segments power-consuming operations by assigning touch processing to a dedicated touch screen controller that operates independently from the host processor. This allows the host processor to enter low-power states during touch interactions, reducing overall power consumption while maintaining the necessary control functions through the specialized controller module.
Solution Approach 2:
The touch screen controller performs self-service by autonomously processing touch input signals and generating touch coordinate data without requiring host processor intervention. This self-contained operation reduces the computational burden on the host processor, enabling it to reduce power consumption during touch-based operations while the dedicated controller handles the intensive touch processing tasks.
Data Source
AI summary
The present disclosure provides a touch and display control device with a touch screen controller and a display driver. The touch screen controller receives a touch sensing signal, generates touch raw data based on the touch sensing signal, and extracts touch information based on the touch raw data. The display driver receives an original image from a host processor, directly receives the touch information from the touch screen controller, generates touch trajectory information by accumulating the touch information, internally generates a touch image to be displayed with the original image based on the touch trajectory information, generates a composite image by synthesizing the original image and the touch image, and controls a display panel to display the composite image. The display driver includes a memory storing the touch trajectory information.