JP2656718B2 - Photoconductive code compiler - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a code compiler, and more particularly to a photoconductive code compiler capable of increasing the number of signal generations and improving the resolution of a mouse.

[0002]

2. Description of the Related Art A computer includes a CPU, a monitor, and a keyboard, which represent data processed by the monitor. Cursor keys (up, down, left, right) are arranged on a standard 101-key keyboard, and the positions of the cursor on the screen are moved by these keyboards, thereby performing data input / output and processing. In a typical word processor, the speed of the cursor keys is sufficient to move the cursor.

However, with the advancement of software, its functions have been further increased. For example, in drafting software such as CAM / CAD, the command is displayed on a screen, and at the same time, the cursor is directly used and the command at which the cursor is positioned is input. Can be selected or performed. In addition, the drawing operation can be performed using the cursor, but in this situation, the speed of the cursor key on the keyboard cannot satisfy the needs of the user. In addition, the cursor keys on the keyboard can only be moved in one direction, that is, horizontally or vertically, which is a major limitation on the use of such software.

[0004] Therefore, a device called "mouse" was invented. The mouse quickly moved the cursor on the screen, not only satisfying the needs of the user, but also exerting the expected effects on the software. The mouse that can quickly move the cursor is classified into a mechanical type and an optical type. The photoconductive code compiler provided by the present invention is applied to a mechanical mouse.

The structure of a mechanical mouse generally includes a frame having a circuit board mounted therein, and having a hole in the center thereof for mounting a trackball, the trackball being free in the hole. Can be rolled with. The frame includes a pair of code compilers, each code compiler includes a grid wheel, and the grid wheel has several small gaps through which light can pass, and light between the two adjacent narrow gaps. Is separated into parts that cannot be taken. In addition, the axis of the grid wheel extends toward the trackball, as well as rolls with it, so that when the trackball rolls, the gridwheel also rotates. In addition, a light source and a sensor are installed on both sides of the grid wheel, respectively. The two pairs of the light source and the sensor are spaced at a constant angular difference, and at the same time are matched with the width of the gap. When the grid wheel rotates, the light source emitted by the light source LED is blocked by a light-impermeable portion on the grid wheel, or a sensor receives the light source. These two situations can be represented by (0,1), where 1 indicates that light passes and 0 indicates that light does not pass. If the grid wheel rotates continuously (whether clockwise or counterclockwise), (1,1) (0,1) (1,0) and (0,
0) Four signals are obtained. After these signals have undergone circuit board conversion, the screen cursor can be moved. Since there are two sets of code compilers, each can be moved horizontally and vertically, or controlled in any direction on the screen. FIG. 1 shows a set of code compilers therein.

[0006]

However, in order to control the cursor accurately, the traders are constantly increasing the number of small gaps by using new technology. However, unless the small gaps are increased to increase the diameter of the grid wheel. The included angle between two adjacent gaps is becoming smaller and smaller, and the number of gaps has a fixed limit and cannot be increased without limit. For example, in a mouse currently used, two light-sensitive chips are attached to a sensor, and the distance between them is 0.94 mm. In the light passing and blocking of the grid wheel, the distance where the light is blocked and the distance between the two light sensing chips are 4: 3, and if the diameter of the grid wheel is 7 mm, the grid wheel The number of narrow gaps through which the light passes must not exceed 15 at most (the mathematical formula of this numerical value will be calculated later). If the number of narrow gaps on the grid wheel through which the light passes exceeds this upper limit, a phenomenon of scatter appears. When such a situation occurs, the light source L
The light source emitted by the ED is not shielded by the light-impermeable part of the grid wheel, and the sensing chip is illuminated by the light source forever. In such a situation, no matter how much the grid wheel rotates, the signal it emits is forever (1,1).

It is, therefore, an object of the present invention to provide a photoconductive code compiler which does not increase the diameter of the grid wheel, increases the number of signal generations, and does not cause a phenomena.

[0008]

In order to achieve this object, a photoconductive code compiler provided by the present invention includes the following. A compile grid wheel, which is defined by a grid wheel body and a central shaft hole, the grid wheel can be fixed to the rotating shaft in a rotating manner through the central shaft hole, and can be simultaneously rotated by the operation of the transmission. A number of light conducting devices are mounted on the periphery of the grid wheel at fixed angular position intervals. The light receiving device is mounted radially on the grid wheel while the grid wheel forms the light path of the light conducting device and the light receiving device. The light source device is located near the compile grid wheel and emits light rays toward the grid wheel. A sensing device is mounted on the periphery of the grid wheel to receive the light emitted by the light conducting device and to emit a signal after sensing the emitted light.

In a preferred embodiment of the photoconductive code compiler of the present invention, the light receiving device defines a conical space on the opposite side of the central axis hole, with the light beam emitted toward the grid wheel. Is reflected by the photoconductive device provided on the grid wheel. In the most preferred embodiment of the photoconductive code compiler of the present invention, the light receiving device has a plurality of paths penetrating the grid wheel body, the cross section of the path is wedge-shaped, and the slope is set at the periphery. It is directed to a light conducting device, which causes light rays emitted toward the grid wheel to be reflected to a light conducting device located at the periphery of the grid wheel.

In a preferred embodiment of the photoconductive code compiler according to the present invention, the light receiving device is installed in an annular groove of a grid wheel body, the annular groove has a triangular cross section, and the hypotenuse is formed on the periphery. It is directed to the installed light transmission device, which reflects it to the light transmission device installed around the periphery of the grid wheel. In the preferred embodiment of the photoconductive code compiler of the present invention, the photoconductive device has a spherical head, which concentrates the received light beam within the effective area.

In a preferred embodiment of the photoconductive code compiler of the present invention, the photoconductive device has a rectangular head with which a received light beam is launched into an effective area. In the most preferred embodiment of the photoconductive code compiler of the present invention, the grid wheel body is made of a translucent material, such as glass, acrylic, polycarbonate, or the like.

In a preferred embodiment of the photoconductive code compiler of the present invention, the light source device is installed at a position where the light rays emitted by the light source device are perpendicular to the grid wheel.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 2, a code compiler 1 produced according to the present invention generally includes a compile grid wheel 10, a light source device 20, and a light source sensor 30. The light source emitted from the light source device 20 is just perpendicular to the compile grid wheel 10, and at the same time, the light source detector 30 is installed near the periphery of the compile grid wheel 10.

Referring to FIGS. 3 (a), 3 (b) and 3 (c), in the embodiment of the present invention, the code compiler 1 includes a compile grid wheel 1
0, which defines a grid wheel body 11 and a cylinder 12 having a conical portion 13 in the center of the cylinder 12 and a central hole for mounting an axis (not shown) on the other side. Provided and actuated and rotated by the use of an actuation unit, for example a trackball. Since the grid wheel body 11 is made of a light permeable material, light rays can be transmitted therein. Going further, the compile grid wheel 11
Includes an optical receiver 14, and in the present embodiment,
The optical receiver has a disk portion 14, which is a cylindrical body 1.
2 is located on the other side and has a recess 141 in the center of the disk portion 14, whereby the disk 14 is formed into a condenser lens 15, and the light source emitted by the light source 20 is And at the same time, irradiate the light beam through the slope of the conical portion 13 to the peripheral portion of the grid wheel.

Further, the grid wheel 11 includes a number of light conducting devices 16 which are mounted on the periphery of the grid wheel 11 with a fixed angular spacing, and the slopes of the conical portion 13. After converging the light rays reflected from the light, the light is irradiated to the outside of the periphery of the grid wheel 11. Light source device 20 is a light emitting diode or similar device, which is located near its compile grid wheel 11 and whose emitted light is presented perpendicular to the grid wheel. Sensing device 3
0 includes two sensing chips 31, 32, the sensing chips 31, 32 are spaced at an appropriate distance from each other, and the sensing device is mounted on the periphery of the grid wheel 11, thereby holding the light conducting device. After receiving the light beam emitted from 16 and further detecting the light beam, it transmits a guidance signal.

In addition, as can be seen in the drawings, each of the photoconductive devices 16 has a circular head 161 which can be used to concentrate the light beam into a luminous flux, as well as a light source detector. 30 can be irradiated. Also,
A recess 162 is spaced between two adjacent photoconductive devices 16, which form the effect of a concave lens,
The light emitted from this part is a diverging light, which cannot be concentrated, so that the light source detector 30 cannot detect the light emitted from it. Therefore, when the grid wheel 11 rotates, the light conducting devices 16 convert the light source into a band of light, which is divided into light and dark, that is, as shown in FIG. In the shaded portion, there is no diagonal line that is illuminated by light), and (1,1), (0,
1), (1, 0) and four signals (0, 0) are generated. Proceeding further, these continuous signals are converted into signals that can move the cursor, constantly moving the cursor on the screen.

FIG. 4 shows the relationship between the rotation angle of the grid wheel 11 and the light sensing chips 31 and 32 when the grid wheel 11 rotates. That is, at 0 °, the photoconductive device 1
The light beam emitted from the head 161 of the sixth light irradiates the sensing area of the light-sensing chip 31 and causes the light-sensing chip 31 to generate the signal (1). Head 16 of photoconductive device 16
Since the light beam emitted from 1 has not yet entered the sensing range of the light-sensitive chip 32, it generates a signal of (0), and the combination of the signals generated by the light-sensitive chips 31 and 32 is (1,0). ). At 2.25 °, the signal is still (1, 0), and at 4.5 °, (0,
0) and 6.75 ° is also (0,0),
Even at 9 °, it is (0,0). In the case of 11.25 °, the signal is converted to (0,1), and when it reaches 13.5 °, it is still (0,1). The signal is (0,1) even at 15.75 °, but is (1,1) at 18 °.
1). If the rotation is continued in this manner, the signal is generated continuously, and the cursor moves with the change of the signal.

As the number of signals generated during one rotation of the compile grid wheel 11 increases, the degree of analysis also increases.
We have to overcome the problem of ray firing. Next, the maximum number of photoconductive devices 16 or narrow gaps (conventional grid wheels) that can be possessed in a situation where the compiled grid wheel 11 does not emit light rays is analyzed. As shown in FIGS. 9 and 10, two light-sensitive chips 31, 32 are provided.
Is represented by L2, L1 represents the distance between the light irradiation range of the head 161 of the photoconductive device 16 of the grid wheel 11 and the recess 162 that does not generate light, and the ratio between L2 and L1 is 3: 4. . As can be seen from FIG. 10, the angle formed by the two adjacent photoconductive devices 16 is A, the distance from the center point of the light sensing chips 31, 32 to the center of the grid wheel 11 is r, and the light sensing chips 31, 32 And the angle formed by the center of the grid wheel 11 as a, the following equation is obtained.

N = 360 / A A = 360 / N L2: L1 = a: A a = 3A / 4 a = 270 / N (1) Also, a / 2 = sin ⁻¹ (L2 / 2r) a = 2 sin ^-1 (L2 / 2r) (2) By combining (1) and (2), the following equation is obtained.

N = 135 / sin ⁻¹ (L2 / 2r) (3) For this reason, if the diameter of the grid wheel 11 is 7 mm, L2 / 2r becomes 0.94, and (a) in FIG. ) And (b), the light-shielding grid wheel used by the conventional code compiler,

[0021]

(Equation 1)

By substituting the numerical value into (2), N = 135 / sin ^-1 (0.94 / 6.2) = 15.48
= [15] Taking the photoconductive grid wheel 11 of the present invention as an example, 2r = 7 + (0.5 × 2) = 8 mm By substituting the numerical value into (2), N = 135 / sin ⁻¹ (0 .94 / 8) = 20.01 =
[20] As can be seen from the above analysis, if the photoconductive device 16 is employed in the grid wheel 11 of the present invention, the number of the photoconductive devices 16 can be reduced from the original [15] without increasing the diameter of the grid wheel 11. It can be increased to [20], the degree of analysis is immediately increased by 25%, and the light ray emission phenomenon does not completely appear.

In the first embodiment of the present invention, the head 161 of the photoconductive device 16 has a spherical shape which has the effect of collecting light rays, but it is formed into a rectangular shape for projecting the light rays onto the light sensing chips 31, 32. You can also. (A), (b),
(C) shows a second embodiment manufactured according to the present invention, in which the main components are all the same as in the first embodiment, and the compile grid wheel 110 includes a grid wheel main body 111 and the center thereof is located at the center. A column 112 is provided. The grid wheel body 111 is made of a material through which light passes, for example, glass, acrylic, or the like. The compile grid wheel 110 is mounted on a suitable axle and is simultaneously activated by use of a trackball (not shown). The compile grid wheel 110 has a number of condensing lenses 113, so that the light emitted to the compile grid wheel 111 is concentrated inside the compile grid wheel 110. The concave portion 1 is located at a position facing the condenser lens 113.
14 are installed, the recess 114 has a wedge-shaped cross section, and the hypotenuse 115 faces the periphery of the compile grid wheel 110. The same as in the first embodiment, the grid wheel 111 includes a large number of photoconductive devices 116, which collect light rays emitted from the hypotenuse 115 (for example, a spherical shape). The head 1161) irradiates the light-sensitive chips 31 and 32 to generate a signal capable of controlling the movement of the cursor.

In the second embodiment of the present invention, the head 1161 of the photoconductive device 116 is a spherical shape having an effect of collecting light rays, but is formed into a rectangular shape for projecting the light rays to the light sensing chips 31 and 32. You can also. FIG. 6 shows the rotation angle and the mutual relationship between the light sensing chips 31 and 32 when the grid wheel 111 is rotated, which is the same as that shown in FIG. do not do.

FIGS. 7 (a), 7 (b) and 7 (c) show a third embodiment manufactured according to the present invention, in which all the main components are the same as in the first embodiment. Includes a grid wheel body 211, and a columnar body 212 is provided at the center thereof. The grid wheel body 211 is made of a material through which light passes, for example, glass, acrylic, or the like. The compile grid wheel 211 is mounted on a suitable axle and is simultaneously activated by use of a trackball (not shown). The compile grid wheel 211 has a cylindrical portion 212 and a disk portion 213. The grid wheel body 2
11 has an annular concave groove 214 having a triangular cross section, and the oblique side 215 faces the periphery of the grid wheel 211. Same as the previous two embodiments, the grid wheel of which includes multiple light conducting devices 216,
The photoconductive devices 216 irradiate the light emitted from the oblique side 215 to the light-sensitive chips 31 and 32 by condensing (for example, a spherical head 2161), and generate a signal capable of controlling the movement of the cursor. .

In the third embodiment of the present invention, the head 2161 of the photoconductive device 216 is a spherical shape having an effect of collecting light rays, but is formed into a rectangular shape for projecting the light rays onto the light sensing chips 31, 32. You can also. FIG. 8 shows the relationship between the angle of rotation of the grid wheel 111 and the mutual relation between the light sensing chips 31 and 32 when the grid wheel 111 is rotated, which is the same as that shown in FIG. do not do.

[Brief description of the drawings]

FIG. 1 is a perspective view of a conventional photoconductive compile grid wheel.

FIG. 2 is a three-dimensional view of a photoconductive compile grid wheel of the present invention.

FIG. 3A is a plan view of a first embodiment of a photoconductive compile grid wheel implemented according to the present invention;
(B) is a sectional view of the first embodiment, and (c) is a bottom view of the first embodiment.

FIG. 4 is a schematic diagram of signal generation in each corner of a photoconductive compile grid wheel implemented according to the present invention.

FIG. 5 (a) is a plan view of a second embodiment of a photoconductive compile grid wheel implemented according to the present invention,
(B) is a sectional view of the second embodiment, and (c) is a bottom view of the second embodiment.

FIG. 6 is a schematic diagram of signal generation at every two corners of the photoconductive compile grid wheel implemented according to the present invention.

FIG. 7A is a plan view of a third embodiment of the photoconductive compile grid wheel implemented according to the present invention,
(B) is a sectional view of the third embodiment, and (c) is a bottom view of the third embodiment.

FIG. 8 is a schematic diagram of signal generation at every three corners of the photoconductive compile grid wheel implemented according to the present invention.

FIG. 9 is a schematic diagram of a photoconductive compile grid wheel implemented according to the present invention in which a light sensing chip receives a light source and generates a signal.

FIG. 10 is a comparison diagram of a photoconductive code compiler according to the present invention and a conventional photoconductive code compiler.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Code compiler 10 Compile grid wheel 11 Grid wheel main body 12 Cylindrical body 13 Conical part 16 Photoconductive device 20 Light source device 30 Light source sensor 31, 32 Sensing chip 161 Head 162 Depression

Claims (12)

(57) [Claims] 1. A compile grid wheel is defined by a grid wheel body and a central shaft hole, and the grid wheel can be fixed to the rotating shaft through the central shaft hole in a rotating manner, and at the same time, is rotated by the operation of the transmission device. A plurality of light conducting devices are mounted on the periphery of the grid wheel with a fixed angular position spacing, and the light receiving device is mounted on the grid wheel radially while simultaneously Forms a light path between the light conducting device and the light receiving device, the light source device is installed near the compiling grid wheel, and emits light rays toward the grid wheel, and the sensing device is installed on the periphery of the grid wheel. Receiving the light rays emitted by the light conducting device, as well as the emitted light After sensing the photoconductive type code compiler that emits a signal. 2. The light receiving device defines a conical space on the opposite side of the central axis hole, and thereby transmits light rays emitted toward the grid wheel to a light conducting device installed on the periphery of the grid wheel. The photoconductive code compiler according to claim 1, wherein the light is reflected. 3. The light receiving device is a plurality of paths penetrating the grid wheel body, the cross section of the path is wedge-shaped, and the slope is directed to the light transmission device installed on the peripheral edge, and 2. The photoconductive code compiler according to claim 1, wherein the light beam emitted toward the grid wheel is reflected by a photoconductive device installed on the periphery of the grid wheel. 4. The light receiving device is installed in an annular groove of the main body of the grid wheel, the annular groove has a triangular cross section, and the oblique side is directed to a light transmitting device installed on the periphery, and 2. The photoconductive code compiler according to claim 1, wherein the light beam emitted toward the grid wheel is reflected by a photoconductive device installed on the periphery of the grid wheel. 5. The photoconductive code compiler according to claim 1, wherein the photoconductive device has a spherical head and focuses the received light beam in an effective area. 6. The photoconductive device has a rectangular head,
2. The photoconductive code compiler according to claim 1, wherein the light beam is emitted to the effective area. 7. The photoconductive code compiler according to claim 1, wherein the grid wheel body is made of a translucent material, such as glass, acrylic, polycarbonate, or the like. 8. The photoconductive code compiler according to claim 1, wherein the light source device is installed at a position where light rays emitted from the light source device are perpendicular to the grid wheel. 9. The compile grid wheel is defined by a grid wheel body and a center shaft hole, and the grid wheel can be fixed to the rotation shaft through the center shaft hole in a rotating manner and simultaneously rotated by the operation of the transmission device. A plurality of light conducting devices are mounted on the periphery of the grid wheel at fixed angular position intervals, and a light receiving device is mounted on the grid wheel radially, and at the same time, the grid wheel Forms the light path of the light conducting device and the light receiving device, the light source device is located at the center of the compile grid wheel, and emits light rays toward the periphery of the grid wheel, and the sensing device is the grid. Installed around the periphery of the wheel to receive and align light rays Photoconductive type code compiler capable of transmitting a signal. 10. The photoconductive code compiler according to claim 9, wherein the photoconductive device has a spherical head and focuses the received light beam in the effective area. 11. The photoconductive code compiler according to claim 9, wherein said photoconductive device has a rectangular head and emits a received light beam to an effective area. 12. The photoconductive code compiler according to claim 9, wherein said grid wheel body is made of a translucent material, for example, a material such as glass, acrylic, or polycarbonate.