Integrated Touch Screen Flat Panel Display with Laser Shielding
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Solution Overview
Problem
The integration of a separate touch screen panel with a flat panel display increases product thickness and manufacturing costs due to the need for additional components and complex manufacturing processes.
Innovation Solution
A flat panel display is integrated with a touch screen panel by forming sense patterns and metal patterns on the upper substrate, which also include sense lines and driving circuits, allowing for a sealing process that shields the driving circuit from laser light, thereby simplifying the manufacturing process and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a separate touch screen panel is attached to the flat panel display, then touch screen functionality is achieved, but the entire thickness of the product increases and manufacturing cost increases
Solution Approach 1:
The patent merges the touch screen panel with the flat panel display by forming sense patterns, sense lines, and metal patterns directly on the upper substrate of the display device. This integration eliminates the need for a separate attached touch screen panel, thereby achieving touch screen functionality while reducing product thickness.
Solution Approach 2:
The upper substrate serves multiple functions: it acts as both the display substrate and the touch screen substrate. By forming both display elements and touch sensing elements on the same upper substrate, the patent achieves multi-functionality, reducing the need for additional components and decreasing overall product thickness.
2Adaptability or versatility
If a separate touch screen panel is attached to the flat panel display, then touch screen functionality is achieved, but manufacturing cost increases
Solution Approach 1:
The patent combines the manufacturing processes of the flat panel display and touch screen panel into a single integrated structure. By forming all necessary patterns (sense patterns, sense lines, metal patterns) on the upper substrate during the display manufacturing process, the patent eliminates the need for separate touch screen panel manufacturing and assembly, thereby reducing manufacturing cost.
Solution Approach 2:
The sense patterns, sense lines, and metal patterns are formed on the upper substrate during the display manufacturing process before final assembly. This preliminary formation of touch screen elements eliminates the need for subsequent attachment steps and reduces overall manufacturing complexity and cost.
3Reliability
If laser light is used to cure sealant in the sealing process, then bonding is achieved, but the driving circuit may be damaged by laser light
Solution Approach 1:
The patent introduces metal patterns formed on the upper substrate as an intermediary shielding layer between the laser light and the driving circuit. These metal patterns reflect or absorb the laser light, preventing it from reaching and damaging the driving circuit while allowing the sealant to be properly cured in the second non-display area.
Solution Approach 2:
The patent divides the upper substrate into different functional areas: sense patterns in the display area for touch sensing, and metal patterns in the first non-display area for laser shielding. This segmentation allows each area to perform its specific function without interfering with others, protecting the driving circuit while enabling proper sealing.
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 integration reduces manufacturing costs and prevents damage to the driving circuit during the sealing process, while enabling effective touch screen functionality without increasing product thickness.
Implementation Method 1
The sealant may be melted by the irradiated laser light, and the melted sealant may be cured so as to bond the upper substrate to the lower substrate.
Implementation Method 2
a capacitive type of touch screen panel senses a change in capacitance, and converts a contact location into electrical signals
Data Source
AI summary
A flat panel display integrated with a touch screen panel comprises a lower substrate, an upper substrate having a display area and first and second non-display areas corresponding to a display area, first and second non-display areas of the lower substrate, respectively, sense patterns on the display area of the upper substrate, sense lines on the first non-display area of the upper substrate, metal patterns on areas between the sense lines and on an outer side of the sense lines, pixels on the display area of the lower substrate, a driving circuit configured to drive the pixels, and sealant disposed on the second non-display area of the lower substrate so as to bond the upper substrate to the lower substrate. The first and second non-display areas of the lower substrate are outside the display area. The driving circuit is on the first non-display area of the lower substrate.