JPH04366880A - Light indication device - Google Patents

Abstract

PURPOSE:To provide the light indication device which eliminates the hand shake of a light beam and does not generate any variance in the size and brightness of a light spot due to a difference in the distance between the operator of the optical indication device and an object to be indicated. CONSTITUTION:Pointer light sources 3a and 3b which emit light beams alpha for indication, projection direction control mechanism parts 4a and 4b for changing the light projection directions of the painter light sources 3a and 3b, and a reception part 6 which receives signals from remote controllers 2a and 2b are provided in a device main body 1. The device main body 1 is fitted on a flank of an overhead projector 21. Each operator has the remote controller 2a or 2b in a hand and turns on and off the painter light sources 3a and 3b or remotely operates the projection directions of the light beams alpha projected from the painter light sources 3a and 3b.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical pointing device. Specifically, the present invention relates to a pointing device for optically indicating a pointing location.

0002

[Background technology] For example, in various lectures, briefing sessions, conferences, etc., explanations are made using white boards, diagrams on paper are used, etc.
Slides, overhead projectors (OHP), etc. are often used. When explaining using these bulletin boards, a pointing device using a light spot is used to point to the explanation location from a distance.

FIG. 5 shows a conventional optical pointing device (optical pointer).
shows. When an operator holds this light indicating device 51 in his hand and turns on a switch 52, a light beam 55 is emitted from a light projection window 53.
4 is emitted, and the designated location is indicated by projecting this light beam onto the designated location.

0004

[Problems to be Solved by the Invention] However, since conventional optical indicating devices are operated by holding them in the hand, they are prone to camera shake and the light spot does not remain stationary at the indicated point, making it difficult to see. .

Furthermore, when multiple optical pointing devices are used at the same time in a conference or the like, the size of the light spot may vary depending on the position of the operator holding the optical pointing device (distance from the operator to the object to be pointed). The brightness of the pods varied, making it difficult to see. In particular, when the operator is far away from the object to be pointed, the light beam may spread and be difficult to reach the point to be pointed.

Furthermore, if a liquid crystal projector or the like that projects images from the back side of the screen is used, even if a light beam is projected onto the screen, the light beam will pass through to the back side, making it impossible to provide instructions. Ta.

The present invention has been made in view of the drawbacks of the above-mentioned conventional examples, and its object is to provide an optical pointing device that can solve each of the above-mentioned problems. .

[0008]

[Means for Solving the Problems] A light indicating device of the present invention includes:
A remote controller comprising a plurality of remote controllers, a plurality of pointer light sources that emit instruction light beams, an actuator for changing the light emission direction of each pointer light source, and a receiving section that receives signals from the remote controllers. The device is characterized by comprising a device main body that controls the light emission direction of the pointer light source in response to a signal from a controller.

[0009]

[Operation] In the optical pointing device of the present invention, the main body of the device is placed, for example, on a table, and each operator holds only the remote controller in his/her hand, and the light beam emitted from the pointer light source inside the main body of the device is controlled. The emission direction is controlled by a remote controller.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 and 2 are a perspective view and a side view showing an embodiment of the present invention, FIG. 3 is a sectional view showing the internal structure of the main body of the device, and FIG. 4 is a plan view of a remote controller.

[0011] In this embodiment, a device body 1 having two built-in pointer light sources 3 and two remote controllers 2a are used.
, 2b constitute a light indicating device, and the device main body 1 is integrally attached to the side surface of the light projecting section 22 of the overhead projector 21.

As shown in FIG. 3, inside the device main body 1, there are two pointer light sources 3a, 3b that emit an instruction light beam α, and each pointer light source 3a, 3b is held in the upper, lower, left, and right directions. an emission direction control mechanism (actuator) 4a, 4b for rotating the pointer light sources 3a, 3b to independently change the light beam emission direction of each pointer light source 3a, 3b; and a power source 5 for causing the pointer light sources 3a, 3b to emit light. , a receiving unit 6 that receives signals from the remote controllers 2a and 2b.
and a control circuit section 7 that operates the emission direction control mechanism sections 4a and 4b according to the signal received by the receiving section 6.

The remote controllers 2a and 2b also include a signal transmitter 8 for transmitting a signal to the receiver 6, an on switch 9, an off switch 10, and a trackball 11, as shown in FIG. ing.

As shown in FIGS. 1 and 2, the overhead projector 2 is placed opposite the screen 23.
1 is installed and, for example, materials, explanatory drawings, etc. are projected from an overhead projector 21 toward a screen 23. On the other hand, the operator
b in hand and point it at the main body 1 of the device and press the on switch 9, the receiver 6 receives an on signal, the power supply section 5 is turned on, and a light beam is emitted from each pointer light source 3a, 3b. . If you operate the trackball 11 in this state,
A control signal is output depending on the direction in which the trackball 11 is operated. When this control signal is received by the receiving section 6 of the device main body 1, the control circuit section 7 controls the emission direction control mechanism section 4a.
, 4b are operated, and the light beam α is moved vertically and horizontally. Therefore, by operating the trackball 11, the operator can remotely control the direction of the light beam α, and can move the light spot to a desired position on the screen 23 (OHP screen). When the light beam α is no longer needed, the remote controller 2a
, 2b, the off signal is received by the receiver 6, the power supply section 5 is turned off, and each pointer light source 3a, 3b stops emitting light.

In the above embodiment, two pointer light sources are built into the main body of the device, but three or more pointer light sources may be built in and operated by three or more remote controllers. Of course. Also,
In the embodiments described above, the apparatus main body is attached externally to the overhead projector, but it may be integrated into a device such as an overhead projector.

[0016] When two or more light beams are remotely controlled as described above, it may become difficult for the operator to determine which light beam is being operated by the operator. In order to avoid such difficulties, it is preferable to make each light spot have a different shape as shown in FIG. 1, to make each light beam a different color, or to make one of the light beams blink.

[0017]

[Effects of the Invention] According to the present invention, the main body of the device can be placed on a table or the like, and each operator can operate the remote controller while holding it in his/her hand.Since the pointer light source itself is not held in the hand, camera shake can be avoided. It never happens.

Furthermore, since each pointer light source is built into the main body of the device, and the light emitting position of each pointer light source is at the same position, the size and brightness of the light spot are uniform, and visibility is improved. In particular, even if the distance between the operator and the object to be pointed to is long, by placing only the main body of the device near the object to be pointed to, the point to be pointed can be reliably indicated.

Furthermore, even when using a rear projection type liquid crystal projector, by placing the main body of the device behind the screen, the projected object on the screen can be directed.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing one embodiment of the present invention.

FIG. 2 is a side view of the embodiment same as above.

FIG. 3 is a cross-sectional view of the device main body in the above embodiment.

FIG. 4 is a plan view of the remote controller in the above embodiment.

FIG. 5 is a perspective view of a conventional example.

[Explanation of symbols]

1　　　　　　　　　　　Device body 2a, 2b Remote controller 3a, 3b Pointer light source 4a, 4b Output direction control mechanism section 6　　　　　　　　　　Reception section

Claims (1)

[Claims] 1. A plurality of remote controllers, a plurality of pointer light sources that emit instruction light beams, an actuator for changing the light emission direction of each pointer light source, and a receiver that receives signals from the remote controllers. What is claimed is: 1. A light pointing device comprising: a main body of the device, the light emitting direction of a pointer light source being controlled by a signal from a remote controller;