Integrated Touch Detecting Structure for OLED Display Thickness Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Organic light emitting diode (OLED) touch display devices face challenges in reducing thickness and weight due to the external arrangement of touch panels, which increases the overall size and heaviness of the devices.
Innovation Solution
A touch detecting structure is integrated inside the OLED display device, featuring a first substrate with signal transmission lines, an insulating layer with protrusions and via holes, and signal transmission terminals that connect with a cathode film on the opposing substrate, allowing for conductive contact only when the substrate is pressed, thus eliminating the need for external touch panels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a touch panel is arranged externally on the OLED display screen, then touch functionality is achieved, but the thickness and weight of the device increase
Solution Approach 1:
The patent merges the touch detecting function with the OLED display structure by integrating touch detecting signal transmission lines directly into the display device's internal layers. The first signal transmission line is arranged on the first substrate, and the second signal transmission line is arranged on the insulating layer, creating an integrated touch sensing system that eliminates the need for separate external touch panels while maintaining touch functionality.
Solution Approach 2:
The touch detecting structure is nested within the OLED display device's internal architecture. The signal transmission lines are embedded between the first and second substrates, with the insulating layer containing via holes and protrusions that accommodate the signal transmission path. This nesting approach allows the touch function to be housed within the existing display structure, reducing overall device thickness.
2Adaptability or versatility
If a touch panel is arranged externally on the OLED display screen, then touch functionality is achieved, but the weight of the device increases
Solution Approach 1:
The patent combines the touch detecting function with the OLED display structure by integrating signal transmission lines into the display's internal layers. This merging eliminates the need for separate external touch panel components, thereby reducing the overall weight while preserving touch functionality.
3Length of moving object
If signal transmission lines are arranged internally within the display device, then thickness is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent segments the signal transmission path into multiple components: a first signal transmission line on the first substrate, an insulating layer with via holes and protrusions, and a second signal transmission line on the insulating layer. This segmentation allows each component to be manufactured and positioned separately, simplifying the overall manufacturing process while achieving internal integration that reduces thickness.
Solution Approach 2:
The insulating layer acts as an intermediary structure that facilitates the connection between the first and second signal transmission lines. It contains via holes for vertical signal transmission and protrusions that provide mechanical support and alignment, simplifying the manufacturing process by providing a structured medium for integrating the signal transmission path.
4Strength
If the second signal transmission line passes over the protrusion, then structural integrity is maintained, but insulation from the cathode film must be ensured
Solution Approach 1:
The patent applies local quality by making the signal transmission terminal insulated specifically where it contacts the protrusion, while maintaining electrical connection through the via hole to the first signal transmission line. This localized insulation approach ensures structural integrity through the protrusion design while preventing harmful electrical contact with the cathode film, resolving the contradiction between strength and insulation.
Data Source
AI summary
The invention discloses a touch detecting structure, an organic light emitting touch display device, a method of detecting a touch on a device and a method of manufacturing a device. The touch detecting structure includes: a first signal transmission line arranged on a first substrate of an organic light emitting touch display device; an insulating layer arranged on the first signal transmission line and having a via hole and a protrusion; a second signal transmission line located on the insulating layer and passing the top of the protrusion; a signal transmission terminal arranged on the lateral surface of the protrusion and having one end connected with the first signal transmission line through the via hole and the other end located on the top of the protrusion, and insulated from the second signal transmission line; and a cathode film arranged on a second substrate.