Integrated Backlight Module for Touch Display Thickness Reduction
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Solution Overview
Problem
Conventional touch display devices face increased thickness and interference issues due to the stacking of capacitive and electromagnetic touch sensing plates, which hinder their performance and usability.
Innovation Solution
A backlight module integrating capacitive and electromagnetic touch sensing functions, where these functions are performed in different time periods using a switch module to electrically connect the respective sensing modules with driving and receiving electrode lines, thereby avoiding interference and reducing device thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If capacitive touch sensing plate and electromagnetic touch sensing plate are stacked on the display panel, then both touch sensing functions are provided, but the thickness of the touch display device is significantly increased
Solution Approach 1:
The patent merges the capacitive touch sensing plate and electromagnetic touch sensing plate into a single integrated structure. The capacitive touch sensing plate includes driving electrode lines and receiving electrode lines that also serve as the electromagnetic touch sensing plate, eliminating the need for separate stacked plates while maintaining both touch sensing functions.
Solution Approach 2:
The electrode lines in the capacitive touch sensing plate serve dual purposes: they function as both capacitive sensing elements and electromagnetic sensing elements. The driving electrode lines and receiving electrode lines are used for both capacitive touch detection and electromagnetic pen detection, making the structure multi-functional.
2Adaptability or versatility
If capacitive touch sensing plate and electromagnetic touch sensing plate are stacked on the display panel, then both touch sensing functions are provided, but interference occurs between the capacitive touch sensing and electromagnetic touch sensing
Solution Approach 1:
The patent implements periodic switching between capacitive touch sensing and electromagnetic touch sensing operations. A switching module alternates between enabling the capacitive touch sensing function and the electromagnetic touch sensing function, ensuring they operate at different time periods to eliminate mutual interference and maintain sensing accuracy.
3Adaptability or versatility
If separate capacitive touch sensing plate and electromagnetic touch sensing plate are used, then both sensing functions are independent, but the device structure becomes complex
Solution Approach 1:
The patent combines two separate sensing plate structures into one integrated capacitive touch sensing plate that performs both capacitive and electromagnetic sensing functions. This merging eliminates the complexity of maintaining separate stacked plates while preserving both sensing capabilities through shared electrode line structures.
Data Source
AI summary
The present disclosure is related to a touch technology field and provides a backlight module and a touch display device using the backlight module. The backlight module includes a substrate, plural driving electrode lines, plural receiving electrode lines, and plural light sources. The driving electrode lines are disposed on the substrate. The receiving electrode lines are disposed on the substrate, in which the receiving electrode lines and the driving electrode lines define plural light source regions on the substrate. The lights sources are disposed in the light source regions, in which each of the light source regions includes at least one of the light sources. The touch display device includes the backlight module and a display panel. The backlight module is configured to provide backlight light. The display panel is disposed on the backlight module to use the backlight light to display images.