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Compact Touch Screen Controller

A technology of controller and touch-sensitive display, which is applied in the direction of instruments, computing, electrical digital data processing, etc., and can solve problems such as consumption and multi-power

Active Publication Date: 2019-11-22
STMICROELECTRONICS ASIA PACIFIC PTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is commercially desirable and technically challenging to reduce the amount of power consumed by the various components of an electronic device
[0006] The touchscreen controller described above provides robust performance but may consume more power than desired

Method used

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  • Compact Touch Screen Controller
  • Compact Touch Screen Controller
  • Compact Touch Screen Controller

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0018] The description proceeds with reference to the accompanying drawings, in which example embodiments are shown. However, many different embodiments could be utilized, and thus the description should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. Like reference numerals refer to like elements throughout.

[0019] initial reference figure 1 , the touch screen controller 1 for electronic devices will now be described. The electronic device includes a driving line D1 driven by a driving circuit 20 and sensing lines S1 - S4 crossing the driving line D1 . At each intersection point between the driving line D1 and the sensing lines S1-S4, a capacitance is formed.

[0020] The touch screen controller 1 includes a receiver circuit 2 . The receiver circuit 2 includes a selection circuit 22 switchable according to a control signal CTRL. The selection circuit 22 is us...

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PUM

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Abstract

A touch screen controller is used to drive lines that emit periodic signals and capacitively intersect a plurality of sense lines. A selection circuit couples a first subset of the sense lines to the first output path and a second subset of the sense lines for each of portions of the periodic signal equal to the number of sense lines. A subset is coupled to the second output path, the second subset being the plurality of sense lines not included in the first subset. Processing circuitry measures the capacitance of the first output path, measures the capacitance of the second output path, and sums the capacitance of the first output path and the capacitance of the second output path for each portion of the periodic signal. The processing circuit determines a capacitance between each sense line in the first and second subsets and the drive line from the sums.

Description

technical field [0001] The present disclosure relates to the field of touch screen devices and more particularly to touch screen controllers for the sensing layer of such touch screen devices. Background technique [0002] Handheld electronic devices, such as smart phones, tablet computers, and smart watches, are very popular among consumers and sold in large quantities. Most of these devices employ touch-sensitive displays for both displaying output to the user and receiving input from the user. Most of these touch sensitive displays utilize capacitive touch sensing. [0003] A typical such touch sensitive display includes a display layer and a sensing layer constructed from technologies such as LCD, IPS or AMOLED. A typical sensing layer includes multiple parallel driving lines and multiple parallel sensing lines. The sense lines capacitively intersect the drive lines. In operation, a single drive line is driven with a wave, such as a square or sine wave. The capacita...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/041G06F3/044
CPCG06F3/0443G06F3/0446G06F3/04166G06F3/0412G06F2203/04111
Inventor L·迪努
Owner STMICROELECTRONICS ASIA PACIFIC PTE