JPS6031637A - Optical mouth - Google Patents

Abstract

PURPOSE:To prevent a brush from damage, to prolong the life and to improve the efficiency of a device by moving a cursor by a signal obtained by a photodetector. CONSTITUTION:At least two sets of light emitting elements 12a, 12b, 14a, 14b irradiating light to discs or cylinders 10, 11 forming white and black checks at equal intervals on their peripheral surface and rotating together with rollers 2, 3 and photodetectors 13a, 13b, 15a, 15b detecting reflected light from the checks are arranged. The rotational frequency of the rollers and also the rotating direction and the rotational of a large ball 1 can be detected by signals obtained by the photodetectors 13a, 13b, 15a, 15b. If the cursor is moved by the signals obtained from the photodetectors 13a, 13b, 15a, 15b, the cursor is moved in accordance with the movement of the large ball 1.

Description

[Detailed Description of the Invention] (Field of Application) The present invention relates to an optical mouse, and in particular to an optical mouse that can move a force to any position on a display surface of a cathode ray tube or the like. .

(Prior art) A mouse is an X-Y coordinate position control device that allows a cursor to be manually moved to any position on the display surface of a cathode ray tube, etc. The details are described in, for example, Japanese Patent Application Laid-Open No. 8
This is described in Publication No. 3737.

FIG. 1 shows an example of a conventional mouse. Rollers 2 and 3 are provided in contact with the large ball 1.

These rollers 2 and 3 are arranged in directions whose axes are perpendicular to each other (for example, roller 2 is arranged in the X direction, [l-ra 3
is the Y direction). Thick disks 6 and 7 are fixed to each of the rollers 2 and 3 via shafts 4 and 5. On the circumferential surfaces of the disks 6 and 7, conducting portions (white portions in the figure) and non-conducting portions (black portions in the figure) are alternately formed at equal intervals. The circular surface of the disk has, for example, four different lengths.
A brush 8.9 consisting of a wooden conductor is brought into contact.

The brushes 8.9 detect the rotation directions and rotation openings of the rollers 2 and 3 using electrical signals, which are sent to a CRT drive circuit (not shown).

In a mouse having such a configuration, the rotation ratio and rotation opening of the rollers 2 and 3 are determined depending on the rotation direction and rotation angle of the large ball 1. Therefore, when the large ball 1 is rotated by an arbitrary amount in an arbitrary direction by hand, an electric signal corresponding to the direction and rotation amount is transmitted to the brush 8.
and 9. With the output of these brushes 8 and 9,
By moving the cursor on the display surface of the cathode ray tube, the cursor can be moved to an arbitrary position in correspondence with the large ball 1.

However, since the conventional mouse described above uses the brushes 8 and 9, there is a drawback that the brushes are easily damaged due to friction with the circumferential surfaces of the disks 6 and 7.

(Objective) The present invention has been made to eliminate the above-mentioned drawbacks, and its object is to provide an optical mouse that does not have the risk of brush damage.

(Overview) In order to achieve the above object, the present invention provides a mouse comprising a large ball, and first and second rollers that are in contact with the large ball and are provided in directions orthogonal to each other. , first and second disks or cylinders that rotate together with the first and second rollers and have a uniform pattern drawn on their circumferential surfaces, a light emitting body that irradiates the pattern with light, and the pattern. It is characterized in that it includes at least two photoreceptors that receive reflected light from and convert it into an electrical signal.

(Example) The present invention will be described in detail below with reference to the drawings.

FIG. 2 is a block diagram of an embodiment of the present invention. In the figure, io and ii are disks or cylindrical bodies with a checkered pattern on which black and white patterns are alternately drawn at equal intervals on the circumferential surface;
(abbreviated as disc), 12a.

12b is a light emitting element, 13a and 13b are the light emitting elements 12a
, 12b and is a light-receiving element that receives light that is reflected on the circumferential surface of the disk. Further, 14a and 14b are light emitting elements, 15a
, 15b is the light emitting element 14a.

This is a light-receiving element that receives light emitted from the disk 14b and reflected on the circumferential surface of the disk 11. Note that the symbols other than those mentioned above indicate the same ones as in FIG.

FIG. 3 is an explanatory diagram showing the positional relationship between the checkered pattern drawn on the circumferential surface of the disk 10 and the light emitting elements 12a, 12b and the light receiving elements 13a, 13b.

The light-receiving elements 13a and 13b are spaced apart by 2/3
li；I 'IQ * Name-71A SuV 6 die IE-
71Q 21-, 3b are configured to receive reflected light directly below them.

In FIG. 4, when the disk 10 rotates, the light receiving strands i3a, 1
The electrical signal output from ab will be explained.

It is now assumed that the positional relationship between the light receiving elements 13a, 13b and the checkered pattern on the circumferential surface of the disk 10 is as shown in FIG. If the disk 10 rotates in the direction of the arrow from this state, the signals output from the light receiving elements 13a and 13b will be as shown in FIG.
The rotation amount of 0 can be determined by counting the number of pulses of the light receiving element 13a or 13b. Also, disk 1
If the output signal of the light-receiving element 13b is latched at the time when the output signal of the light-receiving element 13a rises, the rotation direction of the disk 10 can be determined as ``L'L'', thereby detecting the rotation direction of the disk 10. be able to.

On the other hand, the waveforms of the signals output from the light receiving elements 13a and 13b when the disk 10 is rotated in the direction of arrow B are shown in FIG.
)become that way. The amount of rotation of the disk 10 can be determined by counting the number of pulses output from the light receiving elements 13a and 13b in the same manner as described above. Also, the rotation direction is
If the output signal of the light receiving element 13b is latched at the time when the output signal of the light receiving element 13a rises, a signal at the "tobi" level can be obtained, so that the direction of rotation of the disc 10 can be determined.

As described above, in this embodiment, the rotational speed of the rollers 2 and 3, as well as the rotational direction and rotation opening of the large ball 1 can be detected based on the signal obtained by the light receiving element. Therefore, by moving the cursor using the signal obtained from the light receiving element, the cursor can be moved in accordance with the movement of the large ball 1.

FIG. 5 shows another embodiment of the invention. In this embodiment, the pattern on the circumferential surface of the disk 10 is a checkered pattern in which black and white squares of the same size are alternately arranged. The light-receiving element 13a is arranged to receive the reflected light from the upper white and black rows, and the light-receiving element 13I) is arranged to receive the reflected light from the lower white and black rows, and the center spacing thereof is white and black width 1
They are spaced apart by two-thirds of the length.

The output signals of the light receiving elements 13a, 131) in this embodiment are as shown in FIG. 6(A) when the disk 10 rotates in the six directions of arrows.
When the disk 10 rotates in the direction of arrow B, the rotation becomes as shown in FIG.

It is obvious that the amount and direction of rotation of the disc 10 can be detected by the output signals of the light receiving elements 13a and 13b, as in the first embodiment.

In each of the above embodiments, the two light receiving elements are separated by 2/3 of the width 1 of the white and black patterns, and the reflected light of the patterns separated by 2/3XI is received. , the present invention is not limited to this, but is installed with a distance of 1/3 x 1,
It is also possible to receive reflected light from a pattern that is 1/3XI away. Further, the light receiving elements may be installed with an interval of 2/3 x l x n or 1/3 x 1 x n (where n is a positive integer). Furthermore, 1/2XI XI (however,
m may be an odd number), or an interval other than the above may be used.

In short, any interval may be sufficient as long as the direction of rotation of the disk 10 can be detected.

Moreover, although each of the above embodiments uses two light emitting elements, the present invention is not limited to this and may use only one light emitting element.

Further, the pattern formed on the circumferential surface of the disk 10 is not limited to the above-described checkered pattern, and various patterns can be considered. Also,
Of course, it is possible to draw patterns using not only the two colors of white and black, but also other colors.

(Effects) As is clear from the above description, according to the present invention, unlike the conventional device, a brush is not used, so there is no fear that the brush will be damaged. This also has the effect of extending the life of the mouse and improving its performance.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a conventional mouse, and FIG. 2 is a diagram of a conventional mouse.
3 is an explanatory diagram of the main part of the first embodiment of the present invention, FIG. 4 is a time chart of the signal output from the light receiving element of FIG. 3, and FIG. 5 is a diagram of the main part of the first embodiment of the present invention. FIG. 6 is an explanatory diagram of the main parts of the second embodiment, and FIG. 5 shows a time chart of signals output from the light receiving element. 1...Large ball, 2,3...0-la, 10°1
1 =... Disk, 12a, 12'b114a, 14b.
・Light emitting element, 13・a, '13b, 15a, 15b・
・Patent attorney representing light receiving element Michito Hiraki and 1 other person

Claims (2)

[Claims] (1) A mouse equipped with a large ball, and first and second rollers that are in contact with the large ball and are provided in directions perpendicular to each other, which rotate together with the first and second rollers, and whose First and second disks or cylindrical bodies each having a uniform pattern drawn on the circumferential surface, a light emitter that irradiates the pattern with light, and a light emitter that receives reflected light from the pattern, and generates electricity.
An optical mouse characterized by comprising at least two photoreceptors that convert into No. 3 photoreceptors. (2) A patent characterized in that the pattern is a checkered pattern