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Method for determining active input elements of an input arrangement and input arrangement

A technology of input components and input elements, applied in keyboard-like equipment coding, electrical components, dynamic coding, etc.

Active Publication Date: 2015-11-04
克里斯多福·赫尔德埃斯
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Simple constructed keyboards often have problems detecting if multiple key switches are activated at the same time

Method used

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  • Method for determining active input elements of an input arrangement and input arrangement
  • Method for determining active input elements of an input arrangement and input arrangement
  • Method for determining active input elements of an input arrangement and input arrangement

Examples

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Embodiment Construction

[0444] The making and using of the preferred embodiment are discussed in detail below. It should be appreciated, however, that the present invention provides many applicable progressive concepts that can be embodied in a wide variety of specific contexts. The specific embodiments discussed are merely illustrative of specific ways to make and use the invention, and do not limit the scope of the invention. However, if not stated otherwise, the same reference symbols denote the same technical features. As used in this application, "may" means the possibility of doing so as well as the actual technical implementation.

[0445] figure 1 A matrix of input devices 10 such as a keyboard is illustrated. The input device 10 comprises a matrix M of conductive lines Ca, Cb and conductive lines L1, L2, the conductive lines Ca, Cb forming the rows of the matrix M, and the conductive lines L1, L2 forming the columns of the matrix M. The conductive lines L1, L2 are driving lines and the c...

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Abstract

The invention relates in an aspect A to a method for determining active input elements (S1a, S2a) of an input arrangement (10), comprising - providing input elements (S1a to S2b) that are connected according to a matrix arrangement, - providing within the matrix arrangement at least two drive lines (L1, L2) that are each connected to a respective driving circuit (2, 4), - providing within the matrix arrangement at least two sense lines (Ca, Cb) that may be used to detect active input elements (S1a, S2a), - providing within the matrix arrangement serial connections (SC1 to SC4) each comprising one of the input elements (S1a) and a resistor (R1a) and each serial connection (SC1 to SC4) being connected to a respective one of the drive lines (L1, L2) and to a respective one of the sense lines (Ca, Cb), - providing pull resistors (Ra, Rb) that connect the sense lines (Ca, Cb) to a first potential, and - using a control device for the driving circuits that drives an active drive line (L1) to a second potential that is different from the first potential and that drives a non active drive line (L2) or non active drive lines to the first potential or to a potential having an absolute offset value from the first potential that is at most 50 percent or at most 10 percent of the absolute value of the difference of the first potential and of the second potential.

Description

technical field [0001] This invention relates generally to input devices, and more particularly to such input devices that allow multiple key detection of simultaneously pressed key switches. Background technique [0002] There are several keyboard types. However, there are still some problems. Keyboards of simple construction often have the problem of detecting if multiple key switches are activated at the same time. These problems are known as "key collisions" and "shadowed keys" for example. On the other hand, it is important to keep the complexity of the keyboard as low as possible. Contents of the invention [0003] The invention relates to a method for determining a plurality of active input elements of an input device, comprising: [0004] providing a plurality of input elements connected according to a matrix arrangement, [0005] providing at least two drive lines within the matrix device, each connected to a respective drive circuit, [0006] providing at l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M11/00H03M11/20
CPCH03M11/003H03M11/20
Inventor 克里斯多福·赫尔德埃斯提罗·哈克
Owner 克里斯多福·赫尔德埃斯
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