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Sensor patterns for mutual capacitance touchscreens

A touch screen, mutual capacitance technology, used in instruments, electrical digital data processing, input/output process of data processing, etc.

Active Publication Date: 2010-12-08
PIXART IMAGING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Further complicating matters is the fact that LCD displays are often employed in combination with capacitive touchscreens on top

Method used

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  • Sensor patterns for mutual capacitance touchscreens
  • Sensor patterns for mutual capacitance touchscreens
  • Sensor patterns for mutual capacitance touchscreens

Examples

Experimental program
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Embodiment Construction

[0028] Such as figure 1 As shown, the capacitive touch screen system 110 generally includes an underlying LCD or OLED display 112, an upper touch sensitive panel or touch screen 90, a protective cover or dielectric plate 95 disposed over the touch screen 90, and a touch screen controller , microprocessor, application specific integrated circuit (“ASIC”) or CPU 100 .

[0029] figure 2 Show Avago Technologies TMBlock diagram of the AMRI-5000 ASIC or chip 100, the ASIC or chip 100 is a low power capacitive touch panel controller designed to provide high precision on-screen navigation for touch screen systems. Capacitive touch screen 90 may be formed by applying a conductive material, such as indium tin oxide (ITO), to the surface(s) of a dielectric plate, typically comprising glass, plastic, or other suitable electrical insulation and preferably Is an optically transparent material and is usually configured in the shape of a grid of electrodes. The capacitance of the grid ho...

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Abstract

The invention relates to sensor patterns for mutual capacitance touchscreens. According to one embodiment, there is provided a mutual capacitance touchscreen comprising a first set of electrically conductive traces arranged in rows or columns and a second set of electrically conductive traces arranged in rows or columns arranged at right angles with respect to the rows or columns of the first set, where the first and second sets of traces are electrically insulated from and interdigitated respecting one another, and gaps between the first and second sets of traces form boundaries between the first and second sets of traces that undulate and that are not straight or linear. Other embodiments of a mutual capacitance touchscreen are also disclosed, such as ''mini-diamond'' sensor array patterns and sensor array patterns that may be manufactured at low cost.

Description

technical field [0001] The various embodiments of the invention described herein relate generally to the field of capacitive sensing input devices, and more particularly to mutual capacitance measurement or sensing, which has particularly effective application in touch screens positioned under LCD displays. Systems, devices, assemblies and methods. Embodiments of the invention described herein include those that can be used in portable or handheld devices such as cell phones, MP3 players, personal computers, game controllers, laptops, PDAs, and the like. Embodiments suitable for stationary applications, such as for industrial controls, home appliances, fitness equipment, etc., are also described. Background technique [0002] There are two main capacitive sensing and measurement techniques used in most touchpad and touchscreen devices today. The first such technique is that of self-capacitance. SYNAPTICS TM Many devices are manufactured using self-capacitance measurement...

Claims

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Application Information

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IPC IPC(8): G06F3/044
CPCG06F2203/04111G06F3/044G06F3/0446
Inventor 罗伯特·里特肯尼思·布鲁尔维塔利·苏克奥威萨伦甘·那拉斯姆汉
Owner PIXART IMAGING INC
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