Touch Display Panel Floating Touch Integration
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Solution Overview
Problem
Existing touch display technologies face limitations in integrating planar touch, floating touch, and display functions, leading to bulky designs, reduced touch accuracy, and inability to achieve a narrow frame due to separate implementations of these functions.
Innovation Solution
A touch display panel with a base substrate featuring electrode blocks, a first driving unit, and a second driving unit, where switch transistors are used to enable both planar and floating touch functions, and the common electrode is utilized for display, allowing for a time division operation between these functions without additional peripheral sensing electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If external infrared sensors are used to realize floating touch, then floating touch function is achieved, but the display apparatus becomes bulky and touch accuracy is limited
Solution Approach 1:
The patent merges the floating touch sensing function with the existing display electrode structure by using the common electrode and signal lines for both display and touch sensing purposes, eliminating the need for separate external infrared sensors and reducing structural complexity
Solution Approach 2:
The common electrode in the display structure is made to serve dual functions: as the common electrode for display and as the sensing electrode for both planar touch and floating touch operations, thereby achieving multi-functionality without additional components
2Adaptability or versatility
If capacitive sensitive touch with increased sensitivity is used for floating touch, then floating touch is realized, but the distance between finger and screen must be short limiting capability
Solution Approach 1:
The patent implements dynamic switching between planar touch and floating touch modes through time-division operation, allowing the system to adapt to different touch distances and interaction scenarios, thereby improving ease of operation across various conditions
3Adaptability or versatility
If separate implementations of planar touch, floating touch, and display functions are used, then each function can be achieved, but the panel frame cannot be narrowed and cost increases
Solution Approach 1:
The patent makes the common electrode and signal lines serve multiple functions simultaneously - as common electrode for display, as sensing electrode for planar touch, and as sensing electrode for floating touch, thereby eliminating the need for additional peripheral sensing electrodes and enabling narrow frame design
Solution Approach 2:
The patent uses time-division operation to periodically switch between planar touch mode and floating touch mode, allowing both functions to be realized using the same hardware resources without interference, thereby reducing structural complexity
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 integration enhances touch sensing accuracy, reduces the panel frame, and saves costs by enabling simultaneous planar and floating touch capabilities while maintaining display functionality without additional sensing electrodes.
Implementation Method 1
a sensing capacitor identifies the touch action in the case that the finger is not in contact with the screen by increasing a sensitivity of the sensing capacitor
Implementation Method 2
the infrared sensor emits infrared light at the time of the touch display apparatus displaying an image, the infrared light is reflected by the finger in the case that there is a certain distance between the finger and the screen and is received by the infrared sensor
Data Source
AI summary
Touch display panel, operating method, and a touch display device are provided. The touch display panel includes a base substrate, a plurality of electrode blocks arranged in an array on the base substrate, a first driving unit including a plurality of first pins, a plurality of switch transistors, and a second driving unit including at least a plurality of first sub-pins and a plurality of second sub-pins. Each electrode block is electrically connected to the first driving unit through at least one touch signal line; a drain of at least one first switch transistor is electrically connected to the same first sub-pin through a same first lead; and a drain of at least one second switch transistor is electrically connected to the same second sub-pin through a same second lead.