Embedded Touch Display Signal Routing via Conductive Media
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Solution Overview
Problem
Conventional touch sensitive displays have complex manufacturing steps and difficulty in achieving miniaturized designs due to the need to manufacture components on both sides of the top substrate, which complicates the integration of touch and display components.
Innovation Solution
The embedded touch sensitive display structure places the touch sensing layer below the top substrate and the touch signal transfer circuit above the bottom substrate, with conductive media between them to transfer signals, allowing all manufacturing to be done on one side of the top substrate, simplifying the process and enabling miniaturization by integrating touch and display signal interfaces on the bottom substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the touch sensing layer and touch signal transfer circuit are disposed on both sides of the top substrate, then the touch sensitive display can function properly, but the manufacturing steps become complex and miniaturized design is difficult to achieve
Solution Approach 1:
The patent moves the touch signal transfer circuit from the front side (above top substrate) to the back side (above bottom substrate), utilizing the z-dimension spatial rearrangement. This dimensional change allows the circuit to be integrated with the bottom substrate manufacturing process, reducing overall manufacturing complexity while maintaining touch display functionality through the conductive media between substrates
2Ease of operation
If the touch sensing layer and flexible printed circuit board are disposed on separate sides of the top substrate, then signal transfer is enabled, but the design cannot be miniaturized
Solution Approach 1:
The patent merges the touch signal transfer circuit with the bottom substrate structure, and integrates the flexible printed circuit board connection at the peripheral bonding area. This consolidation allows signal transfer functionality to be achieved within a compact footprint, enabling miniaturized design while maintaining proper signal transfer from the touch sensing layer to the control circuitry
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 approach reduces manufacturing complexity and enables miniaturization by eliminating the need for separate manufacturing steps on both sides of the top substrate, increasing efficiency and allowing for a more compact design.
Implementation Method 1
The conductive media is disposed between the touch sensing layer and the touch signal transfer circuit for transferring the touch signals between the touch sensing layer and the touch signal transfer circuit
Data Source
AI summary
The present invention relates to an embedded touch sensitive display, which includes a liquid crystal display (LCD), a touch sensing layer, a touch signal transfer circuit and a conductive media. The liquid crystal display comprises a top substrate, a bottom substrate, and a liquid crystal layer which is configured between the top substrate and the bottom substrate. The touch sensing layer is disposed below the top substrate of the LCD for generating touch signals after sensing an outside touch action, and the touch signal transfer circuit is disposed above the bottom substrate of the LCD. The conductive media is disposed between the touch sensing layer and the touch signal transfer circuit for transferring the touch signals between the touch sensing layer and the touch signal transfer circuit.