TDDI Controller Memory Sharing for Size Reduction
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Solution Overview
Problem
Current Touch and Display Driver Integration (TDDI) chips have a large device size and high power consumption due to independent operation of touch and display driving functions in separate memories, which hinders their integration and application.
Innovation Solution
A touch display driving apparatus with a controller and memory that performs specific reading and writing operations for display data during display periods and touch data during touch periods, sharing memory resources to optimize storage and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If touch and display driving functions are integrated into a single TDDI chip, then integration level is improved, but device size and power consumption increase due to independent operation in separate memories
Solution Approach 1:
The patent merges the touch driving function and display driving function into a single integrated controller that shares a common memory resource. The controller is configured to perform different reading and writing operations on the same memory depending on whether the touch display panel is in display working period or touch working period, eliminating the need for separate memories and reducing device size.
Solution Approach 2:
The controller is designed with multi-functionality to handle both touch driving operations and display driving operations using a single memory resource. The controller can dynamically switch between reading display data and writing touch data to the same memory, making the memory serve multiple purposes and reducing overall device complexity and size.
2Device complexity
If touch and display driving functions are integrated into a single TDDI chip, then integration level is improved, but power consumption increases due to independent operation in separate memories
Solution Approach 1:
The patent merges the touch driving function and display driving function into a single integrated controller that shares a common memory resource. The controller is configured to perform different reading and writing operations on the same memory depending on whether the touch display panel is in display working period or touch working period, eliminating the need for separate memories and reducing device size.
Solution Approach 2:
The controller is designed with multi-functionality to handle both touch driving operations and display driving operations using a single memory resource. The controller can dynamically switch between reading display data and writing touch data to the same memory, making the memory serve multiple purposes and reducing overall device complexity and size.
3Ease of operation
If separate memories are used for touch and display driving functions, then memory access is simplified, but memory utilization efficiency decreases leading to larger device size
Solution Approach 1:
The patent merges the touch driving function and display driving function into a single integrated controller that shares a common memory resource. The controller is configured to perform different reading and writing operations on the same memory depending on whether the touch display panel is in display working period or touch working period, eliminating the need for separate memories and reducing device size.
Solution Approach 2:
The controller dynamically switches between different operations on the shared memory based on the working period. During display working period, the controller performs first reading and writing operations for display data; during touch working period, the controller performs second reading and writing operations for touch data. This dynamic allocation optimizes memory utilization while maintaining ease of access.
Data Source
AI summary
A touch display driving apparatus, a method, and a touch display apparatus are provided. The touch display driving apparatus is connected with a touch display panel; and the touch display driving apparatus includes a controller and a memory connected with the controller, wherein the memory is configured to store display data and touch data; and the controller is configured to perform a first reading and writing operation for reading and writing display data in the memory, when the touch display panel is in a display working period; or, perform a second reading and writing operation for reading and writing touch data in the memory, when the touch display panel is in a touch working period.