Touch Screen Display Electrode Integration
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Solution Overview
Problem
The standard method of manufacturing touch screen displays involves separately producing a display and a touch sensor, which is inefficient in terms of time and cost, and requires additional integration processes.
Innovation Solution
A touch screen display design that incorporates first and second touch electrodes, voltage lines, signal lines, and switching units to alternately provide voltage and touch driving signals to the electrodes, reducing the number of signal lines needed and minimizing dead space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If separate manufacturing of display and touch sensor is used, then manufacturing flexibility is maintained, but manufacturing time and cost increase
Solution Approach 1:
The patent combines the display and touch sensor into a single integrated structure where touch electrodes are formed within the display structure itself. The touch electrodes are created using the same thin film deposition processes as the display, eliminating the need for separate manufacturing and integration steps, thereby improving productivity while managing complexity through unified design
2Ease of manufacture
If separate manufacturing of display and touch sensor is used, then manufacturing flexibility is maintained, but manufacturing cost increases
Solution Approach 1:
The display and touch sensor are manufactured together in a single process flow, using common deposition chambers and materials. The touch electrode layers are deposited simultaneously with display layers, reducing the total number of manufacturing steps and lowering overall manufacturing cost while maintaining ease of manufacture through standardized processes
3Area of stationary object
If standard touch electrode configuration is used, then touch functionality is provided, but dead space increases
Solution Approach 1:
The touch electrodes are nested within the display structure by forming them in the same layered architecture. The touch electrode layers are deposited within the same thin film stacks as the display, utilizing the same physical space rather than adding separate layers, thereby minimizing dead space while preserving touch functionality
Solution Approach 2:
The patent transitions from planar touch electrodes to three-dimensional vertically stacked electrodes. By arranging touch electrodes in multiple layers at different heights within the display structure, the design achieves effective touch sensing with reduced footprint and minimized dead space on the display surface
Data Source
AI summary
A touch screen display is disclosed. In one aspect, the touch screen display includes a plurality of first touch electrodes each including first and second ends opposing each other and a plurality of second touch electrodes crossing the first touch electrodes. The touch screen display also includes a first voltage line providing a voltage, a first signal line providing a touch driving signal, and a plurality of first switching units respectively connected to the first touch electrodes. Each of the first switching units is electrically connected to the first voltage line, the first signal line, and the first end of a corresponding first touch electrode. Each of the first switching units alternately provides one of the voltage and the touch driving signal to the corresponding first touch electrode.