KR20050077230A - Pen-type position input device - Google Patents

Abstract

The present invention relates to a pen type input device capable of recognizing or inputting a cursor position on a display using light generated from a display screen or a specially designed object or reflected light. That is, by using the light from the display or the light from the pad or the like designed to give the position information, or using the reflected light, to provide a pen-type position input device designed to move the position of the display cursor, input characters and design will be. According to the present invention, an information display unit (in the case of a display, corresponds to a unit pixel portion of each of R, G, and B) and a non-display unit (in the case of a display, correspond to a black matrix or an electrode line) within a dot constituting a display or pad. By using the light quantity difference between), it is possible to display the position information of the cursor and move the position. Of course, in order to obtain such a light amount difference, position information can be displayed or moved by using a different color between pixels or by designing a cursor to give a light amount difference between unit pixels.

The pen-type position input device of the present invention condenses an image with an optical system (lens, etc.) and inputs it into an image sense so as to decompose a contrast portion between pixels constituting a display or a pad, or a contrast portion between dots constituting a cursor. By controlling the information output from the image sensor, the central processing unit (computer, etc.) processes the position movement distance of the pen-type position input device by a program to display the cursor position, which enables accurate and accurate position input compared to the conventional position input device. There is an advantage.

Description

Pen-type position input device

The present invention relates to a display position input device, and more particularly, to a pen-type position information input device composed of an optical system and an image sensor designed to replace a mouse, a touch screen, and a digitizer. The pen-type location information input device includes a device designed to move a cursor, display characters, and design a display on a display using light emitted from a display device or a specially designed pad or reflecting light. The pen-type location information input device transmits location information to the host so that the host synchronizes the received location information signal according to horizontal and vertical synchronization signals to display the image. As such, the display device displaying the image signal generated from the host uses a control key to control the function. The control key has a main function of inputting information and has been mainly dependent on a keyboard or a mouse, but in recent years, a touch screen, a digitizer, a fan input device, or a pen mouse device due to the advantages of easy handling and simplicity. Usage is spreading.

The touch screen or digitizer technology is a technology for identifying a position from an external input signal by a user's touch or a fan without inputting information by a mouse or a keyboard, and displaying the input information according to the image. Or, you have a touch screen or digitizer on the back. In the case of a pen input device or a pen mouse device, in order to obtain position information, a light source unit is installed inside the pen to irradiate the light emitted from the light source onto a display or a plane, and an image image is reflected on the sensor using an optical system. By investigating, the positional information according to the movement of this image image was obtained.

In the touch screen, various position recognition methods are used to recognize a position from an external input signal. For example, a resistive touch screen, a capacitive touch screen, Acoustic wave touch screen and infrared touch screen are applied, and in the case of the digitizer, an electromagnetic induction method including a signal oscillator for inputting information and an antenna board for recognizing position information of the oscillator This is being applied.

FIG. 1 is a diagram illustrating an infrared touch screen, and as shown, the infrared touch screen 10 includes a light emitting diode 11 for generating infrared light between two substrates spaced apart from each other at the left and top edges thereof. And a light detector 12 that detects infrared rays at the right and bottom edges thereof. In such an infrared touch screen 10, when pressure is applied to the touch screen by a user's hand operation from the outside, the light emitted from the light emitting diode 11 is blocked by the pressure to press the touch screen, at this time, Infrared detection by the X and Y axis light receiving sensors 12 of the light receiving unit is blocked to detect the X and Y positions.

However, in the conventional touch screen including the infrared touch screen as described above, a structure capable of recognizing the position must be installed in front of the display device, and in a position input device such as a digitizer using electromagnetic waves, the position is recognized on the back of the display. It was necessary to install a structure such as an antenna board. In addition, in the case of the pen input device, a light source irradiated to the object must be separately installed in order to obtain information according to the movement of the pen, so that the power consumption is not only large, but also the work is cumbersome and difficult to handle. Since such a pen input device, a touch screen, and a digitizer have to be provided with a separate structure on the display device, there is an unfavorable problem in terms of price. Accordingly, the present invention has been made to solve the above-mentioned conventional problems, the pen-type display position that can be directly input from the display device or a specially designed pad, despite the omission of the installation of a structure such as a touch screen or antenna board The purpose is to provide an information input device.

The pen-type positional information input device of the present invention for achieving the above object comprises: an optical system for collecting light emitted from a pixel into one focal point; An image sensor for converting an optical signal into an electrical signal; A cable or radio wave generator for transmitting an electrical signal; An exterior case for supporting the structure; It consists of switches that can control the screen arbitrarily.

The pen-type position information input device according to the present invention converts an optical signal into an electrical signal to recognize accurate position information. The pen position information input device includes an information display unit (in the case of a display, R, G, and B, respectively) that constitutes a display or a pad. The position information display and the position movement of the cursor are displayed by using the light quantity difference between the unit color pixels) and the non-display unit (in the case of a display, corresponding to a black matrix or an electrode line). That is, when the pen-type position information input device is moved from the information display unit to the non-display unit, an electric signal generated by the sensor can be accurately counted according to the light or darkness of the light incident on the sensor. to provide. Of course, in order to obtain such a light amount difference, position movement information display or information input can be performed by using a different color between pixels or by designing a cursor so as to give a light amount difference between unit pixels.

In order to determine the moving direction of the pen-type position information input device, two image sensors are arranged at the focal position of the optical lens in the x-axis and the y-axis. That is, when the pen-type position information input device moves from the light emitting portion to the non-light emitting portion, the direction is determined by the first of two image sensors formed on each of the x and y axes, and the change of the electrical signal from each image sensor is counted. By doing so, you can get information about the location movement, and you can also input information from the outside.

(Example)

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a plan view illustrating the pen-type location information input device 22 using the display 21 according to an embodiment of the present invention. As shown, the pen-type position input device forms an image with the transparent layer 23 for protecting the display screen and preventing the inflow of impurities into the optical system, and the condenser lens 24 for collecting light emitted from the pixels of the screen at the imaging point. Means for controlling the image sensor 25 for converting the converted optical signal into an electrical signal and a cable or transmission means 26 for transmitting the electrical signal generated by the image sensor, the power supply 27 and the pen-type position information input device. It is composed of a switch 28. In this case, the display apparatus 21 corrects the image signal distortion by the electrode wiring formed between the red pixel 31, the green pixel 32, the blue pixel 33 and the pixel to form a color image as illustrated in FIG. 3. It consists of a vertical black matrix 34 and a horizontal black matrix 35 for preventing. In this case, the color pixels are arranged in a stripe method, a delta method, or the like according to an array method.

4 is a plan view of a state in which the unit color pixel 42 and the black matrix 41 are formed on the image sensor by the optical system. Two sensors 43 and 44 are disposed on the x-axis, and two sensors 45 and 46 are disposed on the y-axis to detect the positional shift in the pixel unit. In this configuration, the red pixel, the green pixel, the blue pixel, and the black matrix illustrated in FIG. 3 are periodically formed. Here, the distance (Lx, Ly) between the two sensors is smaller than the image size (Sx, Sy) of the unit pixel, it is possible to accurately input the position of the unit pixel unit. An example of a specific principle of the pen-type position input device is as follows. In the first step, when there are unit pixels on all the image sensors 43, 44, 45, and 46, each sensor is in an operating state and is recognized as an origin. In the second step, when the pen-type location information input device moves on the screen, the light on the sensor disappears due to the black matrix area. At this time, if 43 goes into the non-operation state first, it moves to the left, if 44 goes into the non-operation state first, it moves to the right. It becomes a state. The third step is to count the positional movement. In other words, after 43 is in the inoperative state, two sensors 45 and 46 are in the inoperative state, and then 44 is counted one pixel shift to the left when 44 is in the inoperative state. Since it is the same about a right side, an upper side, and a lower side, description is abbreviate | omitted. In the case of moving to the upper left corresponding to the diagonal movement, the two sensors 43 and 46 become inoperable, and when 44 and 45 become inoperable, the counter moves diagonally. As in the previous case, the diagonal movements of the lower left, upper right, and lower right are counted in the same manner, and thus descriptions thereof will be omitted.

5 shows a cursor 52 for the screen to obtain positional information in the low luminance state 51. When the luminance of the screen is low, the image sensor may not recognize the luminance of the black matrix portion 53 and the pixel portion 54. In this case, by brightening the pixel of the cursor as shown in FIG. 5, the position movement can be counted when the pen-type position information input device is moved on the cursor, thereby enabling position movement and information input through the cursor.

6 shows a cursor 62 for position input when the position information cannot be recognized by the black matrix or when the screen is in the low luminance state 61. By uniting adjacent unit pixels in the cursor with light and dark pixels, the positional movement according to the movement of the pen-type position information input device on the cursor can be counted or information input is possible.

In the case where the arrangement of the color pixels is arranged in the delta method, the cursor can be configured in the same manner as above to display and input the position movement information, and thus description thereof will be omitted.

Therefore, the present invention collects light generated from each pixel on the image sensor and uses a black matrix or cursor in the pixel to move the cursor position of the image and input information by the cursor without installing a separate touch screen. Provide the device.

Meanwhile, in the embodiment of the present invention, only the case where the pen-type position input device is applied to the display display device (which reflects the structure and driving of the liquid crystal display in general terms) is described and described. Application to a position input device using the designed pad is possible.

As described above, the pen-type position input device of the present invention can input position information on a display or a specially designed pad without installing an additional light source on a touch screen, a digitizer, and a pen. Therefore, it is possible to solve the problem of the cumbersome process and the price increase according to the installation of the touch screen.

In addition, the accurate position input method in unit pixel units according to the present invention has an advantage of solving the disadvantage of low accuracy of position input in a touch screen, a digitizer, and a mouse.

  In addition, the pen-type position input device according to the present invention can omit the installation of the touch screen, and therefore a portable touch display device can be used for a wide range of applications.

Meanwhile, although specific embodiments of the present invention have been described and illustrated, modifications and variations can be made by those skilled in the art. Accordingly, the following claims are to be understood as including all modifications and variations as long as they fall within the true spirit and scope of the present invention.

1 illustrates a conventional infrared touch screen.

2 is a cross-sectional view showing a display and a pen-type location information input device according to an embodiment of the present invention.

3 is a plan view of a pixel structure constituting the display device;

4 is a plan view of a unit pixel formed by an optical system on an image sensor;

5 is a cursor composed of a black matrix and color pixels formed on a low luminance screen

6 is a cursor configured to have contrast between neighboring pixels on a low luminance screen

Explanation of symbols on the main parts of the drawings

21 display device 22 position input pen 23 transparent layer,

24: image focusing lens 25: location information input sensor means

26: information transmission control means 27: power supply unit 28: control switch

31: Red pixel 32: Green pixel 33: Blue pixel

34: vertical black matrix, 35: horizontal black matrix

41: Image on the sensor on the black matrix

42: Image of image on sensor of unit color pixel area

43, 44: sensor for detecting the x-axis movement of the pen-type position input device

45, 46: Sensor for detecting the y-axis position movement of the pen position input device

51, 61: screen of low luminance state

52, 62: cursor outline virtual line

53: black matrix

54, 63: unit color pixel

64: unit color pixel in the dark state

Claims (8)

A pad designed as a display device or unit pixels; An optical system for converging the light emitted from the display unit pixel or the designed unit pixel of the fed or reflecting light into one focal point; An image sensor for converting an optical signal into an electrical signal; A cable or radio transmitter for transmitting electrical signals; An exterior case for supporting the structure; Pen-type position input device comprising a switch for arbitrarily controlling the screen The pen-type position input device according to claim 1, wherein the optical system constituting the pen-type position input device includes a transparent layer at a pen tip which is a light inlet. According to claim 1, wherein the unit pixel configuration of the display device or the designed pad has a dark portion composed of a black matrix or electrode wiring and image information to recognize the position information according to the movement of the pen-type position input device Pen-type position input device characterized in that the (bright) portion 2. The image sensor configuration of claim 1, wherein the image sensor configuration includes placing at least two sensors on the x axis with respect to the x axis and determining at least two sensors with respect to the y axis to determine coordinates according to the movement of the pen-type position input device. Pen-type position input device characterized in that the arrangement The optical system of claim 4, wherein the optical system is configured such that the x and y widths of the image of the unit pixel formed on the image sensor are larger than the maximum length of the x-axis sensors and the maximum length of the y-axis sensors. Pen-type location information input device characterized in that the optical system is arranged to input the 4. The unit pixel configuration of the display device or the designed pad according to claim 3, wherein the unit pixel configuration of the display device or the designed pad includes a dark portion formed of a black matrix or electrode wiring and a reflection for displaying image information so as to recognize the position information according to the movement of the pen-type position input device. Pen-type position input device characterized in that consisting of The display screen of claim 1, wherein in the screen configuration of the display device, all the color pixels inside the cursor are turned on, and the display screen is configured to allow the pen-type location information input device to recognize and input the location information from the cursor. One pen locator The display apparatus of claim 1, wherein a cursor is formed in a display device such that light pixels or dark pixels having different neighboring pixels are formed, and the pen-type location information input device placed on the cursor is recognized and inputted. Pen-type position input device comprising a screen