Touch Display Panel With IR Absorption Pattern for Stylus Detection
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Solution Overview
Problem
Existing touch display devices struggle to effectively detect touches from infrared styluses due to inefficiencies in infrared light absorption and reflection patterns, leading to suboptimal performance and structural bulkiness.
Innovation Solution
A touch display device utilizing an infrared absorption pattern and an infrared reflective structure, incorporating a metal electrode in the display panel, enhances infrared light detection by combining a functional film with an infrared absorption pattern to optimize infrared transmittance and reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing touch display devices use conventional infrared detection methods, then they can detect touches, but the detection precision is insufficient and the device structure becomes bulky
Solution Approach 1:
The patent combines the infrared absorption pattern directly with the display panel structure, merging the touch detection function into the existing panel layers. The infrared absorption pattern is formed as part of the display panel's internal structure rather than as a separate component, thereby improving detection precision while avoiding increased device complexity
Solution Approach 2:
The display panel structure is designed to serve multiple functions: it simultaneously performs display function and infrared touch detection function. The infrared reflective structure and absorption pattern are integrated into the panel's existing layers, allowing the same structure to handle both visible light display and infrared light detection without requiring separate dedicated components
2Measurement precision
If existing touch display devices use conventional infrared detection methods, then they can detect touches, but the device thickness increases
Solution Approach 1:
The infrared detection components are nested within the existing display panel layers. The infrared absorption pattern is formed within the panel's internal structure, and the infrared reflective structure is integrated into the same layered architecture, allowing the detection system to be contained within the existing thickness rather than adding external components
Solution Approach 2:
The patent merges the infrared detection functionality into the display panel's existing structure by forming the infrared absorption pattern as part of the panel layers and using the infrared reflective structure within the same thickness envelope, thereby achieving improved detection precision without increasing device thickness
3Measurement precision
If existing touch display devices use conventional infrared detection methods, then they can detect touches, but power consumption increases
Solution Approach 1:
The infrared reflective structure and absorption pattern are designed to passively interact with infrared light from the stylus. The structure uses the physical properties of light reflection and absorption without requiring active power-consuming components, allowing the system to achieve improved detection precision through passive optical interaction rather than active sensing that would consume energy
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 configuration allows for precise detection of infrared reflective patterns, reducing the device's thickness and power consumption while improving touch sensitivity, particularly with infrared styluses.
Implementation Method 1
an infrared absorption pattern configured to absorb infrared light that is incident on the infrared absorption pattern
Implementation Method 2
the plurality of light emitting elements include infrared reflective electrodes that reflect infrared light incident onto the infrared reflective electrodes
Data Source
AI summary
A touch display device comprising a display panel including a plurality of light emitting elements and a plurality of transistors and an infrared absorption pattern formed on an emission surface of the display panel, wherein electrodes included in the plurality of light emitting elements or electrodes included in the plurality of transistors are infrared reflective electrodes.