Optical Touch Display Panel Flat Appearance Design
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Solution Overview
Problem
Optical touch display panels face design challenges due to protrusive structures required for light guidance, resulting in a poor appearance and lack of modern flatness.
Innovation Solution
An optical touch display panel design featuring a supporting substrate, flexible display panel, transparent elastomer, light emitting element, and sensing element, where the light emitting element is positioned between the substrate and display panel, allowing light to transmit through the elastomer to create a sensing space, eliminating the need for an infrared light path above the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a light guide unit is disposed on the front frame beside the display surface, then the optical touch control module can function, but the structure becomes protrusive and the appearance is poor
Solution Approach 1:
The patent merges the light guide unit with the display panel by positioning the light emitting element and sensing element directly on the display panel surface. This integration eliminates the need for separate protrusive light guide structures on the front frame, achieving both functional reliability and appearance flatness.
Solution Approach 2:
The patent transitions from a front-frame mounted light guide unit to a display panel integrated light guide system. By moving the light emitting and sensing elements to the display panel dimension, the design achieves a flatter profile while maintaining optical touch functionality.
2Ease of manufacture
If the light emitting element and sensing element are disposed on the front frame, then the optical touch module can be assembled, but the degree of integration with the display panel is low
Solution Approach 1:
The patent combines the light emitting element, sensing element, and display panel into a single integrated unit. This merging reduces the number of separate components that need to be assembled, simplifying the manufacturing process while increasing the degree of integration between the optical touch module and display panel.
3Reliability
If an infrared light path is maintained above the display panel, then the optical touch sensing can function, but the design flexibility and appearance are compromised
Solution Approach 1:
The patent relocates the infrared light path from above the display panel to within the display panel structure itself. By positioning the light emitting and sensing elements on the display panel, the system maintains touch sensing accuracy while eliminating the need for external infrared light paths that would compromise design flexibility.
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 design enhances the appearance by integrating the touch control module more seamlessly, providing better flexibility in design and maintaining accurate touch position calculation based on light blocking and intensity changes.
Implementation Method 1
The light emitting element is adapted to provide a light toward the transparent elastomer. The light is transmitted through the transparent elastomer to between the supporting substrate and the flexible display panel to define a sensing space.
Implementation Method 2
the optical touch module determines a position of the touch object according to light blocking and a change in light intensity caused by the touch object
Data Source
AI summary
An optical touch display panel includes a supporting substrate, a flexible display panel, a transparent elastomer, at least one light emitting element and at least one sensing element. The flexible display panel is disposed above the supporting substrate. The transparent elastomer is disposed between the supporting substrate and the flexible display panel. The light emitting element is disposed beside a first side of the transparent elastomer and adapted to provide a light toward the transparent elastomer. The sensing element is disposed beside a second side of the transparent elastomer. The light is transmitted through the transparent elastomer to between the supporting substrate and the flexible display panel to define a sensing space.