Shared Memory for TDDI Display Parameters and Touch Firmware
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Solution Overview
Problem
Existing input-display devices require separate memory for storing display parameters and touch firmware, leading to increased complexity, spatial requirements, and costs due to the need for multiple integrated circuits.
Innovation Solution
A shared memory is used to store both display parameters and touch firmware, reducing the number of integrated circuits required and simplifying manufacturing by integrating the memory with the input-display device circuitry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate memory is used for display parameters and touch firmware, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent combines separate memory resources into a shared memory structure that stores both display parameters and touch firmware. This merging approach reduces the number of discrete memory components while maintaining the reliability benefits of dedicated storage areas through logical separation within the shared memory, thereby reducing device complexity without sacrificing reliability.
Solution Approach 2:
The shared memory is designed to serve multiple functions simultaneously - storing display parameters for the display device and touch firmware for the proximity sensor device. This multi-functional memory structure eliminates the need for separate dedicated memories, reducing overall device complexity while maintaining reliable access to both types of data through a single unified memory resource.
2Reliability
If separate memory is used for display parameters and touch firmware, then reliability is improved, but manufacturing cost increases
Solution Approach 1:
The patent merges separate memory components into a single shared memory structure, reducing the total number of discrete parts that need to be manufactured and assembled. This consolidation lowers manufacturing costs by reducing component count, assembly steps, and quality control requirements, while maintaining reliability through logical organization of display parameters and touch firmware within the shared memory.
3Reliability
If separate memory is used for display parameters and touch firmware, then reliability is improved, but area occupied increases
Solution Approach 1:
The patent combines separate memory allocations into a single shared memory structure located on a separate substrate, reducing the total area occupied by memory components. This physical consolidation eliminates redundant memory structures and interconnections, thereby reducing the area occupied on the display substrate while maintaining reliable access to both display parameters and touch firmware through the shared memory resource.
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 solution simplifies manufacturing, reduces spatial requirements, and lowers costs by eliminating the need for additional integrated circuits while maintaining effective image and touch sensing capabilities.
Implementation Method 1
a plurality of capacitive sensing electrodes for capacitive sensing in a sensing region of the display screen
Data Source
AI summary
An input-display device includes a display screen on a display substrate and capacitive sensing electrodes for capacitive sensing in a sensing region of the display screen. The input-display device also includes a touch and display driver integration (TDDI) circuit on the display substrate, the TDDI circuit including a source driver circuit driving a subset of display pixels of the display screen based on a processed image signal, and an analog frontend for the capacitive sensing, interfacing with the capacitive sensing electrodes to obtain touch signals. The input-display device also includes an image processing circuit generating the processed image signal based on a received image signal and a display parameter, a touch processing circuit generating a touch output signal by processing the touch signals based on instructions of a touch firmware, and a memory physically separate from the display substrate, the memory storing the display parameter and the touch firmware.