JPS60250424A - Mouse pad of optical mouse - Google Patents

Abstract

PURPOSE:To improve the operability and to eliminate the fatigue of eyes by using a material having an extremely small transmissivity of a visible light area compared with that of an infrared beam area to produce a light transmissive substrate for mouse pad. CONSTITUTION:A mouse pad 5 contains a transparent substrate 6 and line patterns 7X and 7Y of thin parallel lines formed on both sides of the substrate 6. The substrate 6 is made of acrylic resin; while patterns 7X and 7Y are formed with print of a light reflecting material such as aluminum, etc. A mouse 1 consists mainly of a line reader 4 attached to a bottom plate 3 that closed an opening of a housing 2 and a circuit substrate which processes the electric signals sent from the reader 4 together with tow line readers 8X and 8Y consisting of light source light emitting diodes 9X and 9Y and photodetecting elements 10X and 10Y respectively. Then the substrate 6 uses an acrylic resin plate having a kind of filter effect that cuts the beams having wavelengths of a visible light area and transmits the near infrared beams having wavelengths of diodes 9X and 9Y.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mouse pad for an optical mouse for moving a cursor displayed on a CRT (cathode ray tube) surface.

A cursor position indicator called a mouse is used as a device for freely moving the CR1 "Double-sided" 2 cursor in the 3Y-axis direction. This mouse is a flat plate called a mouse pad.
By moving horizontally and vertically with 2.

It is possible to give the cursor a movement in the XY axis directions that corresponds to the movement of the mouse.

□As an optical mouse, for example, the patent application was published in 1982.
Optical mice such as those described in Japanese Patent Application No. -500777 are known. This optical mouse has a mouse back
Vertical and horizontal checkered stripes of different colors, such as a green line pattern in the X-axis direction and a red line pattern in the Y-axis direction, are detected by line detection consisting of a light-emitting element and a light-receiving element. The cursor is read by a means to instruct the cursor to move in the X and Y axes directions. In this conventional optical mouse, two colored lines are used to distinguish between the X-axis direction and the Y-axis direction, and two light sources or filters with different colors are used to identify and read the lines. Is there a need to drown? In addition, in order to form lines of 62 different colors on the same plane and to detect them distinctively, a light source,
Two-color lines are detected by time-division processing in which light-receiving elements are synchronized and light emission and detection are alternately repeated. Therefore, there is a disadvantage that the device is complicated and expensive.

The object of the present invention is to solve the problems of conventional optical mice, and to solve the problems of conventional optical mice.
An object of the present invention is to provide an improved mouse pad for the optical mouse of No. 29500.

The mouse butt of the optical mouse disclosed in Japanese Patent Application No. 58-229500 has a first line pattern for detecting one direction consisting of optically detectable parallel thin lines provided on a first plane, and the above-mentioned one. The pad has an optically detecting opening provided on a second plane separated by a certain distance from the first plane for detecting a direction orthogonal to the first plane. The base is made of a glass plate or acrylic resin plate with a thickness of 3 to 6 inches that is transparent to the light source of the mouse, and a line width of 0 is provided on both sides of this transparent substrate.
．． 4-0.6mm, distance between lines 0.4-0.611+
m parallel thin lines or in directions perpendicular to each other. A line pattern made of parallel thin lines is made up of lines that have a higher reflectance than a transparent substrate for light emitted from a light source provided on the mouse body, such as a lamp or a light emitting diode. When an acrylic resin is used for the transparent substrate, the reflectance of the acrylic resin is about 4% near visible light, so lines made of a thin aluminum film vacuum-deposited on the surface of the acrylic resin plate are used. . The reflectance of aluminum deposited on a surface close to a mirror surface is approximately 90%, so of the light irradiated onto the bat, approximately 90% is reflected on the lines, and approximately 4% is reflected on the transparent area between the lines. is reflected.

Therefore, if a light-receiving element such as a photodiode is placed in the optical path where these reflected lights travel, this light-receiving element will detect the presence or absence of a line as a difference in the amount of received light, and this difference in the amount of received light will be converted into an electrical signal for the light-receiving element. 6 line patterns marked on the front and back of the pad, each line is focused on, and the position of the mouse body relative to the pad is detected. A line detection means including an optical system distinguishes and reads the X-axis direction and the Y-axis direction.The lens making up the optical system has a focal length of 5 to 8 m.
A convex lens with an effective diameter of about 51 m or a lens system composed of a plurality of lenses is used, but the optical system with the best configuration is used depending on the line pattern and the positional relationship of the light receiving elements.

The present invention will be explained below with reference to illustrated embodiments.

First, to explain the mouse body that cooperates with the mouse pad of the present invention, the mouse j includes a housing 2 shaped like an inverted bowl, a bottom plate 3 that closes the opening of the housing sink 2, and a line reading device 4 attached to this bottom plate 3. and a circuit board (not shown) for processing electrical signals from the line reading device 4. Two line reading devices 8X and 8Y are built into the housing 2 by being fixed to the bottom plate 3. The line reading devices 8X and 8Y include light sources 9X and 9'Y that illuminate the line patterns 7X and 7'Y on the mouse pad 5, respectively.
Light receiving element 1 that detects the same patterns 7X and 7'Y, respectively
Lens II for forming real images of 0X, 1θY, and the same patterns 7X and 7V on the light receiving elements IQX and IQY, respectively.
It is composed of support members 12X and 12Y that support X, IIY, the light sources, the light receiving element, and the lens in a predetermined positional relationship.

Light emitting diodes having an emission wavelength of approximately 950 nm are used as the light sources 9X and 9Y. This wavelength of light is in the near-infrared region, which is invisible to humans.

The focal point of the lens eye X is on the front surface of the band having the line pattern 7x, and the focus of the lens IIY is on the back surface of the bat having the line pattern 7Y. Following,
When reading the line pattern 7X through the lens IIX, the line pattern 7Y will be located at a position away from the focal plane of the lens IIX, so there is no possibility that the line pattern 7Y will interfere with the reading of the line pattern 7X. There isn't. Similarly, when the line pattern 7x is read by the lens tty, the line pattern 7X is read by the lens tty. Since the line pattern 7X is located away from the Y focal plane, the reading of the line pattern 7Y is not obstructed by the line pattern 7X.

A slider 13 made of, for example, Teflon (trade name), nylon, or silicone resin, which has a small coefficient of friction against the surface of the pad 5, is fixed to the lower surface of the housing 2. When placing 3 at each vertex of a triangle with three sliders, that is, when using the three-point support method, the mouse body will not wobble relative to the pad, so it is important to always keep the mouse body in the correct posture. Be able to move it.

It is not necessary to provide a separate light source for each reading device to illuminate the line pattern. As shown in FIG. 5, by aiming the line patterns 7X and 7Y irradiated by one light source 29 with the lens 31X, the light receiving element 30X, and the lens 31Y and the light receiving element 30Y, one light source can be omitted. I can do it.

In the case of Fig. 5, the optical axis of the light source and the optical axis of each lens are placed in one plane, and in the case of Fig. 2, the light source 9
A plane including the optical axis of X and the optical axis of lens IIX, and the light source 9
Although the plane containing the optical axis of N and the optical axis of lens 11Y are parallel to each other, the direction of the lens optical axis pointing toward the line pattern irradiated by the light source is the direction shown in FIG. 2 or 5. It is not limited to.

FIG. 1 shows an embodiment of the present invention, in which the mouse pad 5 has a transparent base @6 and line patterns 7X and '7Y consisting of thin parallel lines formed on the front and back sides of the base plate 6, respectively.
It is composed of.

The substrate 6 is made of an acrylic resin having a thickness of 5 mm, a width of 210 mm, a length of 300 nm, and a size of approximately A-row, 4-size chairs. The line pattern 7X is for instructing the cursor to move in the X-axis direction, and a light reflective material such as aluminum is printed on the surface of the substrate 6, that is, the upper surface on which the mouse moves.

Provided by coating or vacuum deposition means,
The width of each line and the distance between the lines are both set to 0.5 mm. The line pattern 7Y is for instructing movement in the l-axis direction (with respect to the cursor), and is printed on the back side of the board G in the same manner as the line pattern 7X, but the direction is changed by 90 degrees to the line pattern 7Y. It is arranged in a number of ways. In order to increase the resolution, it is good to reduce the intervals in the line, but if the mouse is
'Considering that it is a position indicator that moves the cursor on the display, the line ゛lJ, the interval is -l2, 1st shift 0, and the Fl control n interval 1, although it is not limited to this, of course.
Moxibustion is appropriate.

Line butter〉・7X optical reflectance is approximately 20 to 4
0%, and that of the line pattern 7Y is adjusted to approximately 90%. The optical reflectance mentioned here refers to the wavelength (approximately 950
(nm).

Mouse pads are typically used while placed on a desk. In order to move the operator sol □ to the desired position, the mouse is moved on the mouse pad while looking at the cR1 display, so although the mouse pad is not directly visible, the mouse pad and light source can be traced to the room. Depending on the relative position of the operator's eyes and the position of lighting lights such as fluorescent lights installed on the ceiling of the mouse pad, natural light coming in from windows, or lanterns placed on the desk, the light from the light source may be reflected directly onto the mouse pad. If the light is reflected by the line pattern and enters the operator's eyes, the operator will feel unnecessary light, which will not only make it difficult to work but also cause eye fatigue.

In order to solve the above-mentioned problems, the present invention has developed a mouse bat substrate that has a filter effect that blocks light with wavelengths in the visible light region and transmits near-infrared light, which is the emission wavelength of one light emitting diode. was used. That is, as shown in Fig. 6, the transmittance is only a little less than 20% for the visible light range of wavelengths from about 400 nm to 770 nm,
Mouse pad 1 (substrate, specifically a mouse pad substrate made of an acrylic resin plate colored chocolate) was used, which exhibits a transmittance of rho% or more for infrared light having a wavelength of nm or more.

] The filter effect, that is, the transmittance, as described above can be determined to various values depending on the coloring pigment or dye used for the substrate and its amount, so the substrate is not limited to a chocolate-colored acrylic resin plate. A substrate containing a pigment or dye in a transparent plate such as a polycarbonate resin plate or a glass plate can be used.

By using such a substrate, the visible light region of the reflected light from the line pattern 7Y provided on the bottom surface of the substrate 6 is blocked by the filter effect of the substrate and does not enter the operator's eyes. Therefore, even if it does enter again, it will only be slight, and the problem of line pattern 7Y causing irritation to the operator's eyes will be solved.

Since the optical reflectance of the line pattern 7X provided on the surface of the substrate is approximately 2υ to 40%, the light reflected by this line pattern 7X does not cause much trouble to the operator, but it may cause some damage to the operator. In order to prevent the user from being conscious of the line pattern of the mouse pad, it is desirable to also cut off the reflected light from the line pattern 7X.

Regular reflection by the line pattern 7X can be prevented by applying a matte thin film 20, which has the effect of diffusely reflecting the incident light from the light source, on the surface of the line pattern 7X, as shown in FIG. .

By the way, in the manufacturing process of the mouse pad, in order to protect the line pattern formed by aluminum vapor deposition method, 1. This process generally includes a process of coating the line pattern with a cured coating such as orkapolysiloxane using a technique called bird coating. The hardened film is coated on the board using a method commonly called the pulling method.

By this pulling method, the pad plate material can be added to the Orkapp polysiloxane stock solution in the present invention! When a colored acrylic resin board is immersed and then pulled out of the yufukuri solution, a layer of 1 μm to 10 μm thick is formed on the surface of the board.
A transparent thin film is formed.

Thereafter, this transparent thin film is subjected to a heat curing treatment in which an organic solution or agent is vapor-deposited, to obtain a glassy but hard thin film, which becomes a protective film covering the line pattern.

In order to produce microscopic roughness on the surface of the protective film after heat-curing the transparent thin film, the above-mentioned stock solution contains amorphous substances such as silica, which is generally called an aerosol. If fine particles are mixed in, these fine particles will remain in the protective film even after the transparent thin film is heated and cured, resulting in very unevenness on the surface of the protective film. These fine irregularities diffusely reflect the light incident from the light source. For example, the light emitted from a lighting lamp on the ceiling is diffusely reflected on the protective film on the line pattern, making the line pattern appear blurred and unclear to the operator. Only the image is visible, so there is no irritation to the operator's eyes.

Since the unevenness on the protective film is extremely fine, it does not reduce the line pattern detection ability of the mouse.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a mouse pad of an optical mouse showing an embodiment of the present invention, Fig. 2 is a sectional view showing the optical mouse, and Fig. 3 is a reading of a line pattern in the X-axis direction. FIG. 4 is a side view showing a line pattern reading device in the Y-axis direction, FIG. 5 is a side view showing a modification of the line pattern reading device, and FIG. 6 is a mouse pad of the present invention. A diagram showing an example of a spectral transmittance curve of a substrate of
FIG. 7 is a partially enlarged sectional view showing an example of the mouse pad with a protective film of the present invention. 1...Optical mouse, 5...Mouse bat, 6...Substrate, 7X, 7Y...Line pattern, 20...Protective film. hanging figure

Claims (1)

[Scope of Claims] 1. A first line pattern indicating one direction consisting of light-reflective parallel thin lines provided on a first plane of a translucent substrate, and a second line pattern facing the first plane. a light-reflective second surface that is provided on the plane of the
A mouse pad for an optical mouse including an infrared light source and a detection element for identifying and detecting line and line patterns,
A mouse bat for an optical mouse, characterized in that the substrate is made of a material whose transmittance in the visible light region is extremely small compared to the transmittance in the infrared light region. 2. A first line pattern indicating one direction consisting of light-reflective parallel thin lines provided on the first plane of the translucent substrate, and a second line pattern provided on the second plane facing the first plane. A mouse bat for an optical mouse, which includes an infrared light source and a detection element for identifying and detecting a second light-reflective nine pattern indicating a direction different from the above-mentioned nine directions,
The substrate is made of a material whose transmittance in the HJ viewing light region is extremely small compared to the transmittance in the infrared light region, and the line pattern provided on the upper surface of the substrate has fine irregularities on the surface. A mouse pad for optical mice that is coated with a protective film.