JPH11110115A - Digitizer device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a digitizer device which never causes an interference fringe even if the position of an electrode of a digitizer shifts and also can eliminate such a case that the electrode overlaps a specific color part of a display pixel. SOLUTION: The linear electrode X1, X2... are arranged in the X axis direction on the screen of a display with the polygonal line-shaped electrode Y1, Y2... arranged in the Y axis direction respectively. The pitch of each pixel is set equal to the pitch of a display pixel (consisting of R, G and B), and each bending width of electrodes Y1, Y2... is set in response to the full length of the display pixel, and the R, G and B areas of each pixel, which are hidden by the electrode Y1, Y2..., are set equal to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digitizer, and more particularly to a digitizer in which interference fringes do not occur between an electrode of a digitizer and a display, thereby eliminating the influence on the emission color of the display.

[0002]

2. Description of the Related Art In an electrostatic digitizer or the like, electrodes are arranged in a matrix in an X-axis direction and a Y-axis direction on a glass plate of a display screen, and a delay pulse is sequentially applied to the electrodes in each axis direction. The pulse at the position touched by the stylus pen is detected, this signal is converted into a required digital signal, processed by an arithmetic circuit, converted into coordinate data corresponding to a digital value, and output. In this case, for example, in a display of a stripe type pixel, when the pitch of the pixel of the display and the pitch of the electrode do not match, interference fringes are generated. Therefore, as shown in FIG.
The pitch of 1, Y2, ... is the same as the pitch of the display pixels, and the position is adjusted so that the electrodes in the Y-axis direction do not overlap the pixels (the figure shows the electrodes being between green and blue) ), The adjustment requires precision, and if there is a misalignment, the same color part of each pixel will be blocked by the electrode,
For example, when the overlapping electrodes are red, there is also a problem that the amount of red light decreases and the color becomes cyanish.

[0003]

In view of the above, the present invention does not produce interference fringes with the display even if the position of the electrode of the digitizer is misaligned. An object of the present invention is to prevent overlapping and affecting the color development of a display.

[0004]

In order to achieve the above object, in a digitizer device according to the present invention, a required delay pulse is applied to a plurality of electrodes arranged on a display in the X-axis direction and the Y-axis direction. Then, the pulse in the X-axis direction and the Y-axis direction at the position touched by the stylus pen is detected, and the input coordinates are recognized by a required arithmetic processing. The red, green and blue stripes are covered by the electrodes in the same ratio.

For this reason, the electrodes in the Y-axis direction are formed in a polygonal line shape with the entire width of the red, green and blue pixels of the display as the bending width.

The electrodes in the Y-axis direction are inclined at an angle corresponding to the diagonal line of the red, green and blue pixels of the display.

Alternatively, the electrode in the X-axis direction is linear,
Arranged at a required angle to the X axis of the display,
The electrodes (in a straight line) in the axial direction may be formed at a required angle with respect to the Y axis of the display.

In this case, the electrodes in the X-axis direction and the electrodes in the Y-axis direction are inclined at angles corresponding to the diagonal lines of the red, green and blue pixels of the display, and are formed so as to cross each other.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on embodiments with reference to the drawings. FIG. 1 is a partial plan view of a main part of an embodiment of a digitizer according to the present invention. In the figure, reference numeral 1 denotes a display such as a PDP (plasma display panel), which is a stripe type of red (R), green (G) and blue (B). , X1, X2, ... are electrodes in the X-axis direction of the digitizer, and Y1, Y2, ... are electrodes in the Y-axis direction, each having the same pitch as the pixel pitch of the display 1. The electrodes Y1, Y2,... Have a polygonal line shape inclined at an angle corresponding to the diagonal line of the pixel composed of R, G, and B of the display 1, and the bending width is a width corresponding to the entire width of one pixel of the display 1. As a result, the electrodes Y1,
The area of the portion hidden by Y2,... Is the same for each of the colors R, G, and B, so that there is no difference in the amount of coloring of each color of the display 1. When the vertical and horizontal width of one pixel is one to one, the inclination angles of the electrodes Y1, Y2,.
45 °.

FIG. 2 is a partial plan view of a main part of another embodiment of the digitizer according to the present invention. The electrodes in the Y-axis direction are linear as in the X-axis direction. Electrodes in the directions of R, G and B of the display 1 respectively.
Are formed at an angle corresponding to the diagonal line of the pixel consisting of and crossing each other. Also in this case, as in the example of FIG. 1, the area of the portion hidden by the electrode of each pixel is the same for each of the colors R, G, and B, so that there is no difference in the amount of color development of each color of the display 1.

The Y axis of the display 1 is shown in FIG.
In the example of FIG. 2, the electrodes in the Y-axis direction are inclined, and in the example of FIG. 2, the electrodes in the X-axis direction and the Y-axis direction are respectively inclined. However, pulses applied to each electrode with a delay are detected with a stylus pen. Then, since the input coordinates are calculated by performing the required arithmetic processing, it is possible to calculate the correct input coordinates by correcting the deviation of the detection position due to the inclination of the electrode so as to be at the center of the corresponding pixel. it can.

[0012]

As described above, according to the digitizer of the present invention, since the electrodes in the Y-axis direction are inclined with respect to the Y-axis of the display, interference occurs even if the position of the electrodes is misaligned. No stripes are formed, and the electrodes do not overlap only with a specific color of a pixel of the display, so that the color of the display is not affected.

[Brief description of the drawings]

FIG. 1 is a partial plan view of a main part of an embodiment of a digitizer according to the present invention.

FIG. 2 is a partial plan view of a main part of another embodiment of the digitizer device according to the present invention.

FIG. 3 is a partial plan view of an essential part of an example of a conventional digitizer device.

[Explanation of symbols]

 1 Display (PDP) X1, X2, ... Electrodes in X-axis direction Y1, Y2, ... Electrodes in Y-axis direction

Claims (5)

[Claims] 1. A required delay pulse is applied to each of a plurality of electrodes arranged on an X-axis direction and a Y-axis direction on a display, and a pulse in the X-axis direction and a Y-axis direction at a position touched by a stylus pen is applied. A digitizer device for detecting and recognizing input coordinates by a required arithmetic processing, wherein the electrode in the Y-axis direction is formed in a polygonal line shape. 2. The digitizer device according to claim 1, wherein the electrodes in the Y-axis direction are formed in a polygonal line shape with the entire width of the red, green and blue pixels of the display as a bending width. 3. The digitizer device according to claim 1, wherein the electrodes in the Y-axis direction are inclined at an angle corresponding to a diagonal line of pixels of red, green and blue of the display. 4. A required delay pulse is applied to each of a plurality of electrodes arranged in the X-axis direction and the Y-axis direction on the display, and a pulse in the X-axis direction and the Y-axis direction at a position touched by a stylus pen is applied. For detecting and recognizing input coordinates by required arithmetic processing, the X-axis direction electrode is tilted at a required angle with respect to the X-axis of the display, and the Y-axis direction electrode is tilted at a required angle with respect to the Y-axis of the display. Digitizer device formed. 5. The digitizer according to claim 4, wherein the electrodes in the X-axis direction and the electrodes in the Y-axis direction are each formed at an angle corresponding to a diagonal line of pixels of red, green and blue of the display and intersected with each other. apparatus.