Wireless passive key device
A wireless passive, key-press technology, used in transportation and packaging, user/computer interaction input/output, vehicle accessories for anti-theft, etc., can solve the problem that the input method cannot meet the electromagnetic input device, etc. changing effect
Active Publication Date: 2009-12-30
BEIJING HANWANG PENGTAI TECH CO LTD
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Problems solved by technology
The stylus can only input pressure information and coordinate information. Nowadays, electromagnetic input devices are widely used, and the limited input methods cannot meet the various needs of electromagnetic input devices. Therefore, there is an urgent need for an input tool that can customize input information, so that it can Various ways to realize information input
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[0017] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0018] Such as figure 1 , the energy of this wireless passive key device comes from electromagnetic waves sent out by electromagnetic input devices (such as handwriting screens, touch screens). After receiving this electromagnetic wave, the wireless passive key device converts it into the energy required by each circuit on the key device , the button device processes the button information, and then reflects the electromagnetic wave with the button information back to the electromagnetic input device, and the electromagnetic input device detects the reflected electromagnetic wave to obtain effective button information. Key information can be freely defined without affecting the performance of the electromagnetic input device.
[0019] Such as figure 2 , the wireless passive key device includes a control circuit, a resonant ...
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The invention discloses a wireless passive key device, and belongs to the field of external input equipment of computers. The wireless passive key device comprises a control circuit, a resonance circuit consisting of a coil and a capacitor, a rectifying circuit and a key array. The device has specific connection relations that: the key array is arranged on a panel of the wireless passive key device and used for inputting key information; the control circuit, the resonance circuit and the rectifying circuit are arranged inside the wireless passive key device; the resonance circuit is directly connected with the rectifying circuit; the resonance circuit receives electromagnetic waves sent by electromagnetic input equipment and induces the electromagnetic waves to generate alternating current, the alternating current is changed into direct current through the rectifying circuit, and the direct current is used by the wireless passive key device; and the control circuit is directly connected with the key array, detects and codes the key information, and feeds back and modulates the coded key information to alternating current signals generated by the induction of the resonance circuit, and the signals can be received by the electromagnetic input equipment. The wireless passive key device can freely define the key information, and has diverse input information types and convenient use.
Description
technical field [0001] The invention relates to the field of computer peripheral input equipment, in particular to a key device used in conjunction with electromagnetic input equipment. Background technique [0002] Electromagnetic input devices are developing rapidly, and these devices mainly use a stylus for input. The stylus can only input pressure information and coordinate information. Nowadays, electromagnetic input devices are widely used, and the limited input methods cannot meet the various needs of electromagnetic input devices. Therefore, there is an urgent need for an input tool that can customize input information, so that it can Multiple ways to realize information input. Contents of the invention [0003] The object of the present invention is to provide a wireless passive key device used in conjunction with electromagnetic input equipment, which can customize input information without affecting the performance of the electromagnetic input equipment. [00...
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Login to View More IPC IPC(8): G06F3/02H03K5/01
CPCB60R25/24
Inventor 尹航侯涛李兵
Owner BEIJING HANWANG PENGTAI TECH CO LTD