CN103257726B - Wireless photoelectric input pen - Google Patents

Abstract

The present invention relates to a wireless photoelectric input pen, wherein the wireless photoelectric input pen includes: an optical mouse sensor for photographing the movement track of the pen head of the wireless photoelectric input pen and obtaining displacement vector information, and for transmitting the displacement vector information to The computer uses the communication part to complete the input, the control chip to control the communication part, the touch circuit to control whether the control chip turns on the input function, the touch switch and the on-off switch to control the opening or closing of the touch circuit. Because the wireless photoelectric input pen is provided with a two-level protection switch for the problem of wrong input, it can avoid the problem of wrong operation that may occur during input, and effectively improve the accuracy of input.

Description

Wireless Optical Input Pen

technical field

The invention relates to a wireless photoelectric input pen, in particular to a wireless photoelectric input pen which can perform suspended input without relying on a writing board and can avoid wrong input.

technical background

With the development of network technology, people generally use the network to obtain various information, and the computer has become an indispensable and important tool in the office.

At present, some people who work with computers are not familiar with pinyin or other various input methods, and can only rely on handwriting devices when they need to use computers to edit a large amount of text.

However, the current computer handwriting input devices sold in the market have problems such as relatively large tools, easy wear and tear on the nib of the writing pen, low input efficiency, and easy mis-input. This brings great inconvenience to the personnel who carry out computer input with handwriting equipment.

Contents of the invention

The present invention is made to solve the above-mentioned problems, and the object is to provide a wireless photoelectric input pen that can perform floating input without relying on a tablet and can avoid incorrect input.

In order to achieve the above object, the present invention adopts the following structure:

The invention provides a wireless photoelectric input pen for text input to a computer connected with the wireless photoelectric input pen, comprising a pen-shaped body with a pen head, characterized in that it also includes: an optical mouse sensor for capturing the movement of the pen head trajectory, and convert the motion trajectory into displacement vector information; the communication part is used to transmit the displacement vector information to the computer to complete the input; the control chip controls at least the communication part, and the touch circuit is used to determine whether the control chip enables the input function control; and a touch switch, which is used to control the opening or closing of the touch circuit, wherein the control chip can also receive the displacement vector information sent by the optical mouse sensor, when the touch switch is turned on, the touch circuit is turned on, and Sending an input signal indicating that input is possible to the control chip, so that the control chip enables the input function, and receives the displacement vector information sent by the optical mouse sensor.

In addition, in the wireless photoelectric input pen of the present invention, the touch circuit further includes an on-off switch for controlling the mechanical on-off of the touch circuit.

In addition, in the wireless photoelectric input pen of the present invention, the optical mouse sensor has a light-emitting element, a CMOS chip and a DSP processor, wherein the light-emitting element is used for emitting light, and the CMOS chip is used for photographing the motion track of the pen head under the light, and obtaining the movement trace. Trajectory information, the DSP processor is used to calculate the displacement vector information according to the motion trajectory information.

In addition, the wireless photoelectric input pen of the present invention also includes: a convex lens, located between the pen tip and the CMOS chip, for enlarging the shooting area of the CMOS chip when the CMOS chip captures the movement track of the pen tip.

In addition, in the wireless photoelectric input pen of the present invention, the light-emitting element is an infrared emitting diode, which is used to emit infrared light that cannot be sensed by human eyes.

In addition, in the wireless photoelectric input pen of the present invention, the communication part includes: a radio frequency transmitter; and a detachable radio frequency receiver connected to a computer through a USB interface, and the radio frequency transmitter is used to convert the displacement vector information into a high frequency radio signal and send Going out, the radio frequency receiver is used to receive and decode the high-frequency radio signal, obtain the displacement information, and transmit the displacement information to the computer through the USB interface.

In addition, the wireless photoelectric input pen of the present invention also includes: a page up key for turning up pages displayed on the computer; and a page down key for turning down pages displayed on the computer, Wherein, when the page-up key is selected, the control chip sends information indicating page-up to the computer through the communication part, so that the page is turned up; Page down information to turn the page down.

Function and Effect of Invention

According to the wireless photoelectric input pen of the present invention, because the control chip is used to control the input function, the touch circuit is used to control whether the control chip turns on the input function, and the touch switch is used to control the opening or closing of the touch circuit, so the wireless photoelectric The stylus needs to turn on the touch switch to perform the floating input. If the touch switch is not turned on, the floating input cannot be performed, thereby avoiding possible misoperation problems during input and effectively improving the accuracy of input.

Description of drawings

FIG. 1 is a schematic structural diagram of a wireless photoelectric input pen according to an embodiment of the present invention.

Fig. 2 is a top view of the wireless photoelectric input pen according to the embodiment of the present invention.

FIG. 3 is a schematic structural diagram of a touch circuit according to an embodiment of the present invention.

detailed description

The wireless photoelectric input pen involved in the present invention will be described in detail below in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the present invention, and the detailed implementation and process given are further illustrations of the present invention, rather than limiting the scope of the present invention.

Example

FIG. 1 is a schematic structural diagram of a wireless photoelectric input pen according to an embodiment of the present invention.

Fig. 2 is a top view of the wireless photoelectric input pen according to the embodiment of the present invention.

As shown in Figures 1 and 2, the wireless photoelectric input pen 20 is used to carry out text input to the computer connected to the wireless photoelectric input pen 20, including a pen-shaped body 15, a battery 8, an optical mouse sensor 17, a convex lens 19, a touch circuit 5, , a touch switch 4, a communication unit, an on-off switch 14, a page-up key 12, a page-down key 13, and a control chip 7 for controlling the above-mentioned components.

The pen-shaped body 15 is used to make it easy for the user to use, and provides joint points for each component, and has a pen tip. When the user uses the pen-shaped body 15 to write, the pen tip can generate a movement track.

The optical mouse sensor 17 is located on the top of the nib, and is connected to the control chip 7 through the connection line 16, and is used to capture the motion trajectory of the pen head, convert the motion trajectory into displacement vector information, and transmit the displacement vector information to the control chip through the connection wire 16 7. The optical mouse sensor 17 includes a light emitting element 1, a CMOS chip and a DSP processor. Among them, the CMOS chip and DSP processor are not shown in the figure.

The light emitting element 1 is fixed on the pen-shaped body 15 through the first fixing device 2 for emitting light. The light-emitting element 1 in this embodiment is an infrared emitting diode, which is used to emit infrared light that cannot be sensed by human eyes. Because the CMOS chip must be in the bright field of view when shooting the movement track of the pen head, if the captured image is dark, the image cannot be analyzed, so the light emitting element 1 is needed. In addition, in order to avoid dazzling light from the light-emitting element 1 when writing, an infrared emitting diode is used, so that the user cannot feel the existence of light when writing, which improves the comfort of writing.

The CMOS chip is fixed on the pen-shaped main body 15 through the second fixing device 3, and is used to capture the motion track of the pen head under the light and obtain the motion track information.

Convex lens 19, located between the pen tip and the CMOS chip, is fixed on the pen-shaped body 15 by the third fixing device 18, and is used for enlarging the shooting area of the CMOS chip when the CMOS chip is shooting the motion track of the pen tip, so that the picture taken by the CMOS chip Clearer and easier for DSP processors to calculate.

The DSP processor is used to calculate the displacement vector information according to the motion track information.

The communication part includes a radio frequency receiver 10 and a radio frequency transmitter 11 .

The radio frequency transmitter 11 is located on the pen-shaped body 15, and is connected with the control chip 7 through a dedicated interface, and can receive the displacement vector information calculated by the DSP processor through the dedicated interface, convert the displacement vector information into a high-frequency radio signal and send it out . The dedicated interface is a signal emission port defined by the user during programming. If a single-chip microcomputer is used as the controller, the user can set four pins to control the positive and negative directions of X and Y respectively during programming.

One end of the radio frequency receiver 10 is a USB interface end, and the other end is movably connected with the pen-shaped body 15 . This radio frequency receiver 10 adopts pluggable design, is inserted in the top of pen-shaped body 15 at ordinary times, is unplugged from pen-shaped body 15 during use, is connected with the USB interface of computer by USB interface end 9. The radio frequency receiver 10 can receive and decode high-frequency radio signals, analyze the displacement information of the nib, and transmit the displacement information to the computer through the USB interface to complete the input work on the computer. The radio frequency transmitter 11 and the radio frequency receiver 10 adopt the existing 2.4GHz wireless optical mouse radio frequency transceiver technology.

The battery 8 is used to provide electric energy to various components such as the control chip 7 , the light emitting element 1 and the optical mouse sensor 17 . In this embodiment, the battery 8 is a button battery R46 installed on the top of the pen-shaped body 15 . The button battery is small in size and light in weight, so that the comfort of the designed wireless photoelectric input pen is well improved when writing.

The on-off switch 14 is located on the power line of the touch circuit 5 and is used to control the mechanical on-off of the touch circuit 5 . When the on-off switch 14 was turned on, the battery 8 powered the above-mentioned components and the touch circuit 5, so that the above-mentioned components and the touch circuit 5 could work normally; The power supply of the touch circuit 5 is cut off, and the above components and the touch circuit 5 cannot work normally. When there is no need for character input, the on-off switch 14 is turned off, and the touch circuit 5 cannot obtain electric energy, so that the input function cannot be performed. Therefore, the on-off switch 14 can be used as a first-level protection switch to avoid false activation of the character input function.

The control chip 7 is used to control the above-mentioned components, can receive and process the information sent by the optical mouse sensor 17 and the touch circuit 5, and transmit the information to the computer through the communication part, so as to realize the input function.

FIG. 3 is a schematic structural diagram of a touch circuit according to an embodiment of the present invention.

As shown in FIG. 3 , the touch circuit 5 is located on the side of the pen-shaped body 15 and is connected to the control chip 7 through a connection line 16 to control whether the control chip 7 enables the input function. A touch switch 4 is provided on the touch circuit 5 . The touch switch 4 is installed on the outside of the pen-shaped body 15 through the opening on the side of the pen-shaped body 15 , and is used to control the opening or closing of the touch circuit 5 . When the user needs to input text, the user presses the touch switch 4, and now the touch switch 4 is turned on, the touch circuit 5 is turned on, and the LSE board interface of the touch circuit 5 derives a current as a signal indicating that the input can be performed. The input signal is sent to the control chip through the connection line 16, so that the control chip 7 turns on the input function, and receives the displacement vector information sent by the DSP processor, thereby starting the input action. When the user needs to input characters, he first opens the handwriting input software of the computer, activates the input interface, and then keeps pressing the touch switch 4 to write, so that continuous input can be performed. When the touch switch 4 is not pressed, it will be closed. At this time, the touch circuit 5 will be disconnected, and the control chip 7 will close the input function, and will not receive the displacement vector information sent by the DSP processor. Input to the computer is not possible. Therefore, the touch switch 4 can be used as a second-level protection switch to avoid erroneous activation of the character input function.

The page up key 12 and the page down key 13 are located on the side of the pen-shaped body 15, and are used to turn up or down pages displayed on the computer respectively. When the page-turning key 12 was selected, the control chip 7 sent information indicating page-turning to the computer through the communication part, so that the page was turned up; when the page-turning key 13 was selected, the control chip 7 sent the information to the computer through the communication part. Indicates the information to turn down the page, so that the page is turned down. The page up key 12 and the page down key 13 are convenient for users to use when reading documents or watching PPT.

A pen clip 6 can also be set on the pen-shaped body 15, and the pen clip 6 and the pen-shaped body 15 are taken as a whole.

The method for the user to use the wireless photoelectric input pen 20 to input includes the following steps:

The first step, the radio frequency receiver 10 is unplugged from the pen-shaped body 15, and connected to the USB interface of the computer through the USB interface port 9;

In the second step, the on-off switch 14 is closed, and the battery 8 starts to supply power;

In the third step, the touch switch 4 is turned on, the touch circuit 5 is turned on, and an input signal is sent to the control chip to indicate that the input can be performed, and the control chip 7 turns on the input function;

Step 4: Move the pen body 15 according to the input needs, the CMOS chip shoots the motion track of the pen head through the convex lens 19 to obtain the motion track information, and the DSP processor calculates the displacement vector information according to the motion track information;

In the fifth step, the control chip 7 receives the displacement vector information through the connection line 16, and sends the displacement vector information to the radio frequency transmitter 11;

Step 6, the radio frequency transmitter 11 converts the displacement vector information into a high-frequency radio signal and sends it out;

In the seventh step, the radio frequency receiver 10 decodes the received high-frequency radio signal to obtain the displacement information, and transmits the displacement information to the computer through the USB interface 9, and the computer completes the text input;

The eighth step, the touch switch 4 is turned off, the touch circuit 5 is disconnected, and the control chip 7 stops the input function;

In the ninth step, the on-off switch 14 is closed to complete the input action.

In the above steps, whether the on-off switch 14 in the second step is closed is used as the first level protection switch to prevent misinput, and whether the touch switch 4 in the third step is closed is used as the second level protection switch to prevent misinput.

The above are only preferred embodiments of the present invention, and it should be pointed out that for those of ordinary skill in the art, some improvements and modifications can also be made without departing from the principles of the present invention, and these improvements and modifications should also be considered Be the protection scope of the present invention.

Function and effect of embodiment

According to the wireless photoelectric input pen of this embodiment, because the optical mouse sensor is used to obtain the motion track information of the pen head, and the communication part is used to transmit the motion track information to the computer to complete the input, so the wireless photoelectric input pen can realize the suspended input, There is no need to use devices such as a writing board for auxiliary input, thereby avoiding wear and tear on the nib, effectively prolonging the service life of the nib, and improving writing efficiency. At the same time, since a matching writing board is not required, the cost of accessories can be reduced.

In addition, in this embodiment, because the on-off switch and the touch switch are used as two-level protection switches to prevent misinput, it is possible to avoid possible misoperation during input and effectively improve the accuracy of input.

Furthermore, each component is installed on the pen-shaped body, which not only has a compact structure, but also facilitates writing, and can improve the efficiency and comfort of writing. In addition, the electronic components in this embodiment are all standard parts, and the equipment has a simple structure, which is convenient for production and application.

Claims (4)

1. a kind of wireless photoelectric input pen, is used for carrying out text input to the computer that is connected with described wireless photoelectric input pen, comprises a pen-shaped body with nib, is characterized in that, also comprises: The optical mouse sensor is used to capture the motion track of the pen head, and converts the motion track into displacement vector information, and has a light-emitting element, a CMOS chip and a DSP processor; a communication unit, configured to transmit the displacement vector information to the computer to complete the input; A control chip controls at least the communication unit; The touch circuit is used to control whether the control chip turns on the input function, and the touch circuit includes an on-off switch for controlling the mechanical on-off of the touch circuit; a touch switch, used to control the opening or closing of the touch circuit; and a convex lens located between the pen tip and the CMOS chip, Wherein, the control chip can also receive the displacement vector information sent by the optical mouse sensor, The light-emitting element is used to emit light, The CMOS chip is used to photograph the movement trajectory of the pen tip under the light, and obtain movement trajectory information, The DSP processor is used to calculate the displacement vector information according to the motion track information, The convex lens is used to enlarge the shooting area of the CMOS chip when the CMOS chip shoots the motion track of the pen head, When the touch switch is turned on, the touch circuit is turned on, and sends an input signal to the control chip indicating that the input can be performed, so that the control chip turns on the input function and receives the optical mouse sensor The displacement vector information sent. 2. The wireless photoelectric input pen according to claim 1, characterized in that: Wherein, the light-emitting element is an infrared emitting diode, which is used to emit infrared light that cannot be felt by human eyes. 3. The wireless photoelectric input pen according to claim 1, characterized in that: Among them, the communication department includes: radio frequency transmitters; and a detachable radio frequency receiver connected to said computer via a USB interface, The radio frequency transmitter is used to convert the displacement vector information into a high frequency radio signal and send it out, The radio frequency receiver is used to receive and decode the high-frequency radio signal to obtain displacement information, and transmit the displacement information to the computer through the USB interface. 4. The wireless photoelectric input pen according to claim 3, further comprising: a page up key for turning up pages displayed on the computer; and a page down key for turning down pages displayed on the computer, Wherein, when the page up key is selected, the control chip sends information indicating page up to the computer through the communication part, so that the page is turned up, When the page down key is selected, the control chip sends information indicating page down to the computer through the communication part, so that the page is turned down.