CN101859205A - Handwriting input device and handwriting input system - Google Patents

Abstract

The invention discloses a hand input device comprising a luminescent device, an image shooting device and a processing chip, wherein the luminescent device and the image shooting device are installed on an assembled body; the luminescent device is adjacent to the image shooting device, and the processing chip is electrically connected with the image shooting device; the luminescent device is used for emitting a light beam to a reflector and forms a light spot on the reflector, and the image shooting device is used for shooting the reflector and the image formed on the light spot of the reflector; and the processing chip is used for receiving a plurality of images shot by the image shooting device, compares and processes images shot in every two adjacent time points and determines the movement locus of the hand input device. The invention also relates to a hand input system adopting the hand input device.

Description

Handwriting input device and handwriting input system

technical field

The invention relates to a handwriting input device, in particular to a handwriting input device and a handwriting input system applied to an electronic display device.

Background technique

With the advancement of information technology, various electronic devices, such as computers, mobile phones, personal digital assistants, etc., have gradually entered everyone's life (see A Practical Control Scheme for a Series Controller to Enhance the Quality of Power Supplied to a Mobilephone Telecom Station. PowerElectronics Specialists Conference, 2005. PESC'05. IEEE 36th, Xiao yu Wang), document editing, network text chat, etc. have become an indispensable part of people's daily life and work.

Existing text input methods mainly include keyboard input, voice input and tablet input. Generally, a tablet input device includes a substrate and a stylus. A plurality of resistors or capacitors are disposed in the substrate. The stylus can be any object that can change the resistance or capacitance, such as a metal rod or a plastic rod. When a stylus is used to touch the substrate, the substrate detects a change in resistance or capacitance at a certain point, and can calculate the position of the stylus and report it to the computer. According to the position of the stylus, the computer can move the cursor accordingly, so as to achieve the function of handwriting input.

However, the above-mentioned tablet input device includes more separate components (such as the stylus and the substrate are separated), which is inconvenient to carry; and the substrate includes a plurality of capacitors or resistors, when one or some resistors or capacitors When damaged, errors will occur in handwriting input, which brings inconvenience to users.

Contents of the invention

In view of this, it is necessary to provide a portable and easy-to-use handwriting input device and handwriting input system.

A handwriting input device includes a light-emitting device, an image pickup device and a processing chip installed in an assembly. The light-emitting device is arranged adjacent to the image-capturing device, and the processing chip is electrically connected to the image-capturing device. The light emitting device is used to emit a light beam to a reflector and form a light spot on the reflector, and the image pickup device is used to capture images of the reflector and the light spot formed on the reflector. The processing chip is used to receive a plurality of images captured by the image capturing device, compare and process the images captured at every two adjacent times, and determine the motion trajectory of the handwriting input device.

A handwriting input system includes the above-mentioned handwriting input device and an output device electrically connected with the processing chip of the handwriting input device. The output device is used for outputting the motion trajectory information of the handwriting input device sent by the processing chip to the output device.

The handwriting input device integrates the light-emitting device and the camera device in an installation housing, which makes it more convenient to carry, especially for users of portable electronic devices, such as notebook computers, mobile phones and personal digital assistants. In addition, the handwriting input device of this embodiment can be used for handwriting input on a common light-reflecting surface, such as a desktop, without a tablet, and is more convenient to use.

The handwriting input system does not need a handwriting board, which makes handwriting input more convenient.

Description of drawings

FIG. 1 is a schematic perspective view of a handwriting input device according to a first embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view along II-II in Fig. 1 .

FIG. 3 is a schematic diagram of the handwriting function principle of the handwriting input device in FIG. 1 .

FIG. 4 is a perspective view of a handwriting input system according to a second embodiment of the present invention.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Please refer to Fig. 1 and Fig. 2, the first embodiment of the present invention provides a kind of handwriting input device 100, and it comprises a mounting case 12 and is installed in this mounting case 12 a light-emitting device 14, a camera device 16 and a The processing chip 18 is electrically connected to the imaging device 16 . In this embodiment, the installation housing 12 is in the shape of a pen, so that it can be held by hand.

The light emitting device 14 is installed at one end of the installation housing 12 . A first hole 122 is defined on the end surface of the installation housing 12 , and the light output end of the light emitting device 14 is exposed to the outside of the installation housing 12 through the first hole 122 so as to emit light to the outside. The light-emitting device 14 is used to emit visible light or infrared light with a relatively concentrated emission direction, such as laser or infrared light with a highly concentrated emission direction. At this time, the light-emitting device 14 can be a laser diode, semiconductor laser, infrared light-emitting diode, etc. In order to make the emitting direction more concentrated, generally a condenser lens (not shown) can be added to the emitting end of the light emitting device 14 .

The imaging device 16 and the light emitting device 14 are located at the same end of the installation housing 12 . A second hole 124 is defined on the end surface of the installation housing 12 , through which the viewfinder end of the lens of the imaging device 16 is exposed to the outside of the installation housing 12 to capture external light for imaging. When the installation housing 12 is moving, the camera device 16 can continuously take pictures and transmit image signals to the processing chip 18 .

The processing chip 18 is installed inside the installation housing 12 and is electrically connected to the imaging device 16 through a data line 20 . Generally, the processing chip 18 can be integrated on a printed circuit board, and the printed circuit board is fixed inside the installation housing 12 , so as to achieve the installation and fixing of the processing chip 18 . The processing chip 18 is used to receive a plurality of image signals picked up by the imaging device 16, and process and analyze the plurality of image signals, such as performing image tracking and other processing, to calculate the moving track of the installation housing 12, thereby determining the input The movement track of the device 100 is the information input by the operator. The processing chip 18 transmits the calculated moving track information of the mounting case 12 to an output device, such as a computer, a mobile phone, or a personal digital assistant, through a data line 22, and finally displays it on a display screen of the output device.

Please also refer to FIG. 3 , the principle of the handwriting input device 100 to achieve the handwriting input function is as follows:

When the installation housing 12 is at a first position, the light emitting device 14 emits light to the surface of a reflector, which can be a desktop or the like, and is not limited to the tablet in the prior art. The imaging device 16 captures the first image 24 that the imaging device 16 can obtain when the mounting housing 12 is located at the first position (as shown in the dotted line box), and the light emitted by the light emitting device 14 and reflected on the surface of the reflector is also captured by the imaging device 16 , the image is displayed as a first light spot 26 , and the imaging device 16 transmits the first image 24 to the processing chip 18 .

Move the installation housing 12 to a second position, and the imaging device 16 captures a second image 28 (shown in a solid line frame), the second image 28 has an overlapping area 30 with the first image 24, and the light emitting device 14 light emitting device 14 The light reflected on the surface of the reflector is also captured by the imaging device 16, and the image is displayed as a second light spot 32. The coordinate position of the second light spot 32 in the second image 28 is the same as that of the first light spot 26 in the first image. The coordinate positions in 24 are the same, and the imaging device 16 transmits the second image 28 to the processing chip 18 .

The processing chip 18 compares the received first image 24 with the second image 28, and according to the relative coordinate position of the first light spot 26 in the first image 24 and the overlapping area 30 and the second light spot 32 in the second image 28 and the The relative coordinate position of the overlapping area 30 is calculated according to the above two relative coordinate positions, and the moving direction and distance of the second light spot 32 relative to the first light spot 26 , that is, the moving track of the installation housing 12 is calculated.

When the installation housing 12 moves to the third position (not shown), the imaging device 16 captures a third image, and the processing chip 18 compares the third image with the second image 28, and calculates the installation housing 12 from the second position. Trajectory of movement to the third position. By analogy, when the installation housing 12 moves continuously, the processing chip 18 can calculate the trajectory of the continuous movement of the installation housing 12, and the processing chip 18 transmits the continuous movement trajectory of the installation housing 12 to the output device for output, then handwriting input The device 100 achieves the handwriting input function.

The handwriting input device 100 of the present embodiment integrates the light-emitting device 14, an imaging device 16 and the processing chip 18 in an installation housing 12, which can make it more convenient to carry, especially for portable electronic devices, such as notebook computers, mobile phones and personal Users of digital assistants are more beneficial. In addition, the handwriting input device 100 of this embodiment can be used for handwriting input on a common light-reflecting surface, such as a desktop, without a tablet, and is more convenient to use.

Referring to FIG. 4 , the second embodiment of the present invention provides a handwriting input system 200 . The handwriting input system 200 includes a handwriting input device 100 described in the first embodiment and an output device 42 .

The output device 42 includes a device main body 44 and a display screen 46. In this embodiment, the output device is a computer, and the device main body 46 is a computer host. The device main body 44 is electrically connected to the handwriting input device 100 through the data line 22 , and transmits the movement trajectory information calculated by the processing chip 18 (as shown in FIG. 2 ) to the display screen 46 for display.

It can be understood that the processing chip 18 can also be installed in the device main body 44 of the output device 42 , and is not limited to the installation housing 12 of this embodiment.

In addition, those skilled in the art can also make other changes within the spirit of the present invention. Of course, these changes made according to the spirit of the present invention should be included within the scope of protection claimed by the present invention.

Claims (10)

1. hand input device, it comprises luminescent device and the image capturing device that is installed on an assembly, this luminescent device and this image are taken the photograph the adjacent setting of device, it is characterized in that, further comprise a process chip that is electrically connected with this image capturing device, this luminescent device is used to send light beam to a reflecting body and forms a luminous point on this reflecting body, the image that this image capturing device is used to absorb this reflecting body and is formed at the luminous point on this reflecting body, this process chip is used to receive a plurality of images of this image capturing device picked-up, and the image of every adjacent two times picked-up compared processing, determine the movement locus of this hand input device.

2. hand input device as claimed in claim 1 is characterized in that, this luminescent device is Laser emission device or infrared transmitter spare.

3. hand input device as claimed in claim 2 is characterized in that, this Laser emission device is a laser diode.

4. hand input device as claimed in claim 1 is characterized in that this process chip is installed in this assembly.

5. hand input device as claimed in claim 1 is characterized in that, this assembly is that a lip pencil is installed housing, and this luminescent device and this image capturing device are installed on the same end of this installation housing.

6. hand input device as claimed in claim 1, it is characterized in that, the relative position of the dot pattern picture that this luminescent device of reflection emits beam in the image of the coincidence zone of this process chip by the image of more adjacent two times picked-up and this each picked-up, Treatment Analysis obtains the movement locus of this hand input device.

7. hand-written input system, comprise a hand input device as claimed in claim 1 and the output unit that is electrically connected with the process chip of this hand input device, this output unit is used to export the motion track information that this process chip is sent to the hand input device of this output unit.

8. hand-written input system as claimed in claim 7 is characterized in that, this assembly is that a lip pencil is installed housing, and this luminescent device and this image capturing device are installed on the same end of this installation housing.

9. hand-written input system as claimed in claim 7 is characterized in that this process chip is installed in this assembly.

10. hand-written input system as claimed in claim 7, it is characterized in that, the relative position of the dot pattern picture that this luminescent device of reflection emits beam in the image of the coincidence zone of this process chip by the image of more adjacent two times picked-up and this each picked-up, Treatment Analysis obtains the movement locus of this hand input device.

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