JP2003279892A - Presentation system using laser pointer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a presentation system using a laser pointer capable of easily and surely setting a detection means for detecting the projecting position of infrared light for mouse image projection on a screen at an appropriate position to the screen. <P>SOLUTION: A PSD light receiving part 71 is provided with a recessed part 72 where the laser pointer 50 is attachably and detachably set and a laser beam is projected from the laser pointer 50 set to the recessed part 72 to the screen 10. With the spot of the laser beam projected from the laser pointer 50 onto the screen 10 as an index, the position of a PSD 70 to the screen 10 is set. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a presentation system for giving a lecture, an explanation, etc. while pointing an image projected on a screen means such as a screen with a laser pointer.

[0002]

2. Description of the Related Art In a presentation in which an image is projected on a screen by a projection device such as a liquid crystal projector and various presentations and explanations are given to an audience while referring to the image, a specific portion of the image is designated. Laser pointers for are often used. By the way, in recent years, there are increasing opportunities to give presentations by reflecting the screen of a personal computer on the screen, and in that case, a mouse operation, which is one of the input devices for the personal computer, is often performed together. For the mouse operation, the presenter operates a mouse connected to the personal computer, but for that purpose, the personal computer needs to be arranged in the vicinity of the presenter, so that the position of the presenter is limited. In addition, the presenter is forced to change his / her hand between the laser pointer and the mouse, which causes dissatisfaction to prevent smooth presentation.

Therefore, the present applicant has filed Japanese Patent Application No. 2001-233.
At 152, I am applying for an invention in which a laser pointer can be used instead of a mouse. In this invention, when the laser pointer is set to the mouse mode, infrared light is projected from the laser pointer in the same direction as the laser light, and the projection position of this infrared light on the screen is detected by the infrared light sensing means, and the projected light is projected. The mouse image is projected on the screen from a projection means such as a liquid crystal projector based on the movement data including the movement direction and the movement distance of the position.

[0004]

According to the above invention, the presenter can quickly operate the mouse by switching the laser pointer to the mouse mode.
As a result, the degree of freedom of the position or movement of the presenter is increased, and a smooth presentation is possible. By the way, in the present invention, the infrared light sensing means detects the projection position of the infrared light that guides the projection of the mouse image on the screen.
A detection means composed of SD (Position Sensitive Detectors) is preferably used. The PSD is a four-division type photodiode that does not require complicated data processing, and the value of the current flowing out from the four sides changes according to the position of the light incident on the surface, so that the PSD of the incident light is changed. It is a position detecting element capable of detecting dimensional information, that is, a position.

However, although the PSD detects the position of light within the detection range, it is not an image pickup device for photographing an actual subject, so that the PSD should be installed so that the detection range can cover the entire screen. It was difficult to set the position of the PSD with respect to the screen.
This is CC when using CCD which is an image sensor.
This is because it is easy to match the photographing range of the CCD with the screen by monitoring the image pickup of D, but such a monitor cannot be performed by PSD. As described above, when the CCD is used, the drawbacks when the PSD is used can be solved, but in that case, since a monitor is required, the cost is increased.

Therefore, the present invention provides a detecting means for detecting the projection position of infrared light for projecting a mouse image on the screen,
It is an object of the present invention to provide a presentation system using a laser pointer that can be easily and surely set to an appropriate position on a screen.

[0007]

The present invention is directed to a laser pointer which projects laser light in a laser pointer mode and infrared light in the same direction as the laser light in a mouse mode, and an infrared light projected on a screen means. A mouse image is projected on the screen means based on the detection means for detecting the light projection position and the movement data including the moving direction and the movement distance of the infrared light projection position on the screen means detected by the detection means. In a presentation system using a laser pointer provided with a projecting means, a laser pointer setting section to which the laser pointer is detachably set is provided in the detecting means, and laser light is screened from the laser pointer set in the laser pointer setting section. By projecting toward the means, the spot of the laser light on the screen means can be used as an index. It is characterized by setting the position of the detecting means relative to the screen means to.

According to the present invention, the laser pointer is set in the laser pointer setting portion of the detecting means, and the detecting means is projected from the laser pointer toward the screen means in an appropriate direction (vertical direction or left-right direction). Direction) to position the spot of the laser light projected on the screen means at the detection means set point previously set on the screen means. Thereby, the detection means can be set at an appropriate position where the entire surface of the screen means can be detected. The detection means set point is a location where the detection means covers the entire surface of the screen means by projecting a laser beam onto the screen means. One of the above can be arbitrarily set. After setting the position of the detecting means in this way, the laser pointer is removed from the detecting means, and the presenter projects a laser beam on the screen means using the laser pointer to give a presentation.

As described above, in the present invention, the laser pointer used by the presenter is set on the detecting means to project the laser light on the screen means, and the position of the detecting means is determined by using the spot of the laser light on the screen means as an index. adjust. Therefore, it is possible to easily and surely set the detecting means at an appropriate position with respect to the screen means. In the present invention, the laser pointer also serves as the item for setting the position of the detecting means, and therefore, it is not necessary to use another dedicated device for setting the position of the detecting means, which does not cause a significant increase in cost. For example, even if the detection means is a CCD, it is not necessary to separately prepare a monitor. Further, the present invention is particularly effective for a PSD in which the detecting means does not have an image pickup device for photographing an actual subject.

In the present invention, the spot of the laser beam is a line extending in the horizontal direction or the vertical direction,
The lateral tilt of the detection means can be easily corrected. That is, for example, when the spot of the laser light is horizontal, if the detection means is tilted, the spot also tilts accordingly, so the attitude of the detection means is adjusted so that the spot becomes horizontal. As a result, the inclination of the detecting means in the lateral direction can be easily corrected.

By the way, since the laser light of the laser pointer is dangerous when it enters the human eye, the laser light projection switch is normally OFF so that the laser light is not accidentally projected. There are many types that are turned on. In the case of such a switch, it is complicated to adjust the position of the detecting means while projecting the laser beam from the laser pointer as in the present invention. Therefore, in the present invention,
It is preferable that the laser pointer is set to the laser pointer setting section so that a switch means is provided so that laser light is projected from the laser pointer. The switch means here may take any form as long as the laser beam is automatically projected when the laser pointer is set in the laser pointer setting section of the detecting means.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 schematically shows the entire system of one embodiment. In the figure, reference numeral 10 is a screen (screen means), 20 is a liquid crystal projector (projection means) for projecting a liquid crystal image on the screen 10, 30 is an image processing unit, and 40 is a personal computer. In the personal computer 40, the data processed by the image processing unit 30 is input as a mouse signal and command data. Image data generated based on the input mouse signal and command data is sent to the liquid crystal projector 20 and projected on the screen 10 as a visible image.

Reference numeral 50 in FIG. 1 denotes a laser pointer which a presenter (not shown) holds. 2 shows the laser pointer 50, and FIG. 3 shows the laser pointer 50.
It is a block diagram showing the structure of. As shown in FIG. 2, the laser pointer 50 has a thin rectangular parallelepiped shape.
The buttons 54 and 55, which will be described later, are used by grasping them with the surface on which they are placed facing upward and placed on the right hand.

The laser pointer 50 is a laser light emitting element 5.
1 and a laser beam projection unit 51a, and
The infrared light projection unit 52 is provided. As shown in FIG. 2, the laser light projection unit 51 a and the infrared light projection unit 52 are arranged on the front end surface of the laser pointer 50 facing the screen 10. The projection direction of infrared light from the infrared light projection unit 52 is set to be substantially the same as the projection direction of the laser light projected from the laser light projection unit 51a. Therefore, when the laser pointer 50 is pointed at the screen 10,
Infrared light is projected on the screen 10. The wavelength of infrared light projected from the infrared light projection unit 52 is, for example, 800 to 9
It is about 50 nm, which is significantly different from the infrared wavelength around 10 μm emitted from the human body.

The laser pointer 50 is provided with a switch 53 for switching the use mode to the laser pointer mode (L) or the mouse mode (M) while sandwiching the OFF position. This switch 53 is a slide type and is set so as to always return to the OFF position. When the switch 53 is switched from OFF to the laser pointer mode, the laser light emitting element 51 is driven and laser light is projected, and when it is switched to the mouse mode, the laser light emitting element 51 is switched.
The laser pointer 50 remains stopped, as will be described later.
Can be used in place of the mouse. In either mode, infrared light is projected from the infrared light projection unit 52. Further, the laser pointer 50 is provided with a left button 54 and a right button 55 used in the mouse mode.
Mode switching signal of switch 53 and each button 5
The operation signals of 4, 55 are supplied to the control unit 56, and
The control unit 56 receives a signal from a control unit 61 on the infrared light receiving unit 60 side, which will be described later, and controls driving of the laser light emitting element 51 based on the signal. As shown in FIG. 2, the switch 5
3 is provided on one side surface of the laser pointer 50 (right side surface when held by the right hand), and the buttons 54 and 55 are provided at appropriate positions on the surface.

Further, as shown in FIG. 5, a push-type internal switch (switch means) 57 for driving the laser light emitting element 51 is provided in the center front on the back side of the laser pointer 50. As shown in FIG. 6, the internal switch 57 is built into the inside of the slit 58a formed in the casing 58 of the laser pointer 50, does not project from the back surface of the casing 58, and is prevented from being inadvertently pressed. There is. This internal switch 57 is normally OFF,
When pressed, it turns on. As shown in FIG. 3, the switch 5
The ON / OFF signal of No. 7 is supplied to the control unit 56, and the control unit 56 controls the laser light emitting element 51 based on the ON / OFF signal.

As shown in FIG. 1, the image processor 30 is projected from a laser pointer 50 and projected onto the screen 10.
An infrared light receiving section 60 for receiving the infrared light reflected by is provided. Further, in this system, the liquid crystal projector 20
A PSD light receiving portion (detection means) 71 including a PSD 70 is installed adjacent to the. This PSD light receiving unit 71 is
As shown in FIGS. 4 and 5, the PSD 70 provided with the rectangular parallelepiped cabinet detects the entire surface of the screen 10 and projects the infrared light projected from the infrared light projection unit 52 of the laser pointer 50. The center of the projection position of the light on the screen 10 is detected.

When the switch 53 of the laser pointer 50 is set to the mouse mode and the laser pointer 50 is moved toward the screen 10 in this state, the projection position of the infrared light on the screen 10 moves, and the movement is detected by the PSD 70. To be done. The image processing unit 30 is supplied with the moving direction and the moving distance of the center of the projection position of the infrared light on the screen 10 detected by the PSD 70.
A mouse image is generated based on the movement data. The mouse image data is supplied to the liquid crystal projector 20 via the personal computer 40. As a result, the laser pointer 50
A mouse image corresponding to the movement of is projected on the screen 10.

Further, in the mouse mode, various commands (for example, range designation, image scrolling, page turning, etc.) are performed by appropriately operating the left and right buttons 54 and 55 of the laser pointer 50 and performing the same operation as the mouse operation. Can be reflected in the visible image. The various commands are performed by the infrared light receiving unit 60 receiving the infrared light projected from the infrared light projection unit 52 of the laser pointer 50 and reflected by the screen 10.

The infrared light projected from the infrared light projecting section 52 of the laser pointer 50 is reflected by the screen 10 so that the light quantity is attenuated, and the light quantity of the infrared light received by the PSD 70 is equal to the attenuated light quantity. It is set within the range. P
The amount of infrared light received by the SD 70 is detected one by one by the control unit 61 provided in the image processing unit 30, and the laser pointer 5 is detected from the control unit 61 according to the received light amount.
A signal for driving / non-driving the laser light emitting element 51 is sent to the control unit 56 of 0 by a wireless signal. In particular,
With the switch 53 in the laser pointer mode, the PSD
When the light receiving amount of 70 is equal to or more than a predetermined amount, the laser light emitting element 5
The drive signal 1 is transmitted, and when the amount of light received by the PSD 70 is smaller than the predetermined amount, the drive stop signal for the laser light emitting element 51 is transmitted. That is, the laser light is projected from the laser pointer 50 when the PSD 70 receives a predetermined amount of infrared light, and feedback control is performed so that the laser light is not projected when the received light amount falls below the predetermined amount.

As shown in FIG. 7, the PSD light receiving portion 71 is
Installation stand 80 with the PSD 70 facing the front screen 10
Can be posted on. As shown in FIGS. 4 and 5, in the front center of the upper surface of the PSD light receiving portion 71, a recess 72 (laser pointer set) into which the laser pointer 50 with its surface facing upward and its tip facing forward is fitted. Part) is formed. When the laser pointer 50 is fitted and set in the recess 72, about half the height of the laser pointer 50 projects from the upper surface of the casing. A projection 73 (switch means) is provided in the center of the recess 72, and when the laser pointer 50 is set in the recess 72, the internal switch 57 is pushed through the slit 58a and automatically turned on. There is. The height of the protrusion 73 is lower than the depth of the recess 72, and is designed so as not to project from the upper surface of the PSD light receiving portion 71. When the laser pointer 50 is set in the recess 72 of the PSD light receiving portion 71, the projection 73 is inserted into the slit 58a of the laser pointer 50, and the switch 53 is fitted in the recess 72, whereby the laser pointer 50 is Movement is restricted.

As shown in FIG. 7, the PSD light receiving portion 71 is mounted on the installation base 80 and is arranged at a predetermined distance from the screen 10. In this state, set the laser pointer 50 to PSD
The laser light is projected from the laser pointer 50 toward the screen 10 while being set in the recess 72 of the light receiving portion 71, and the spot of the laser light is projected on the PSD set point (for example, the center) predetermined on the screen 10. Then, the PSD light receiving portion 71, that is, the PSD 70, is arranged at an appropriate position where the entire surface of the screen 10 can be detected.

The above is the configuration of the system according to one embodiment. Next, the operation relating to the setting and presentation of PSD according to the present invention will be described. (1) PSD Setting As shown in FIG. 7, the PSD light receiving section 71 is placed on the installation base 80 that is spaced a predetermined distance from the screen 10, and the PSD 70 is directed toward the screen 10. Next, in the recess 72 of the PSD light receiving portion 71, the surface is faced up and the tip is forward (screen 1
The laser pointer 50 is fitted and set in the direction 0). Then, the internal switch 57 of the laser pointer 50
Is turned on by being pushed by the projection 73, laser light is projected from the laser pointer 50, and the spot of the laser light is reflected on the screen 10. Next, the PSD light receiving unit 71 is moved in the vertical direction or the horizontal direction) to position the spot of the laser light projected on the screen 10 at the PSD setting point. As a result, the PSD light receiving unit 71, that is, the PSD 70, is arranged at an appropriate position where the entire surface of the screen 10 can be detected.

(2) Presentation A. To perform the laser pointer mode presentation, first, the laser pointer 50 is removed from the PSD light receiving unit 71. When the laser pointer 50 is detached from the PSD light receiving section 71, the internal switch 57 which has been turned on by being pushed by the protrusion 73 is automatically turned on.
It becomes FF and the laser light is not projected. The presenter holds the laser pointer 50 in a hand and stands at a predetermined position, and the switch 53 is set to the laser pointer mode toward the screen 10.

In the state where the laser pointer 50 in the laser pointer mode is directed toward the screen 10, infrared light is projected from the infrared light projection unit 52 onto the screen 10, and the infrared light reflects off the screen 10 and the PSD 70. Is received by. In that case, the amount of light received by the PSD 70 is greater than or equal to a predetermined amount, and the control unit 61 causes the control unit 5 of the laser pointer 50 to move.
A drive signal is sent to 6 to drive the laser light emitting element 51, and laser light is projected on the screen 10. On the other hand, when the direction of the laser pointer 50 is removed from the screen 10, the amount of infrared light projected from the infrared light projection unit 52 onto the screen 10 decreases, and the amount of light received by the PSD 70 also decreases to a predetermined amount. Fall below. Then, the control unit 61 issues a drive stop signal to the control unit 56 of the laser pointer 50, and the laser light is not projected. That is, the laser pointer 50
The laser light is projected only when the screen is directed toward the screen 10, which prevents erroneous projection of the laser light.
You can give a presentation safely.

B. Mouse Mode Next, when performing a mouse operation with the laser pointer 50, the switch 53 of the laser pointer 50 is switched to the mouse mode, and the laser pointer 50 is directed to the screen 10. Then, the PSD 70 detects the moving direction and the moving distance of the projected position of the infrared light projected from the infrared light projection unit 52 on the screen 10 one by one. Image processing unit 3
0 is supplied with the moving direction and the moving distance of the center of the projection position of the infrared light on the screen 10 detected by the PSD 70, and the image processing unit 30 generates a mouse image based on the moving data. The mouse image data is supplied to the liquid crystal projector 20 via the personal computer 40.
As a result, a mouse image corresponding to the movement of the laser pointer 50 is projected on the screen 10. That is, the mouse image corresponding to the movement of the laser pointer 50 is displayed on the screen 1.
Since it is projected to 0, the presenter adjusts the movement of the mouse image to a desired position while looking at the mouse image.

According to the present embodiment, the laser pointer 50 used by the presenter is set in the PSD light receiving portion 71 to project the laser light on the screen 10, and the spot of the laser light on the screen 10 is used as an index for the PSD light receiving portion 71.
By adjusting the position of, the PSD 70 can be easily and reliably set to an appropriate position with respect to the screen 10. That is, the laser pointer 50 is the PSD 70.
Also serves as a position setting item. Therefore, P
There is no need to use another dedicated device for setting the position of the SD 70, and a significant increase in cost will not occur. Especially P
The SD70 does not have an image sensor that captures the actual subject,
Although it is difficult to set the position, by adopting this system, the position setting of the PSD 70 with respect to the screen 10 can be performed easily and reliably.

If the spot of the laser light is a line extending in the horizontal direction or the vertical direction, the attitude of the PSD light receiving portion 71 is adjusted so that the line does not incline, so that the PSD light receiving portion 71 moves in the horizontal direction. The inclination can be easily corrected.

Further, the laser pointer 50 of the present embodiment.
Has an internal switch 57 that is not inadvertently pressed, and this internal switch 57 moves the laser pointer 50 to P
When it is set on the SD light receiving portion 71, it is pushed by the protrusion 73 and automatically turned on to project laser light. Therefore, PS
When setting the position of D70, the laser light can be projected without operating the switch 53 for switching to the laser pointer, which is convenient and prevents erroneous projection of the laser light.

As mentioned above, the laser pointer is PS
As a mechanism for automatically projecting laser light when it is set in the D light receiving portion, it is possible to apply a system for controlling erroneous projection of laser light by infrared light. With that system, for example, while an infrared light projection unit is provided in the PSD light receiving unit, the infrared light projected from the infrared light projection unit of the PSD light receiving unit is provided to the laser pointer only when the laser pointer faces the screen. A light receiving section for receiving light is provided. Then, the laser light is projected from the infrared light projection unit of the PSD light reception unit only when the infrared light reception unit of the laser pointer is receiving the infrared light. Here, in order to automatically project the laser light when the laser pointer is set to the PSD light receiving part, the infrared light projecting direction is changed by rotating the infrared light projecting part of the PSD light receiving part. The infrared light receiving section of the laser pointer set on the PSD light receiving section receives infrared light toward the laser pointer set on the section. As a result, when the laser pointer is set on the PSD light receiving section, the laser light is automatically projected toward the screen.

[0031]

As described above, according to the present invention,
Laser light is projected from the laser pointer set on the detection means toward the screen, and the position of the detection means with respect to the screen is set using the spot of the laser light on the screen as an index. The effect is that it can be set to an appropriate position.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of a system according to an embodiment of the present invention.

FIG. 2 is a perspective view of a laser pointer according to an exemplary embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a laser pointer.

FIG. 4 is a side view of a PSD light receiving unit on which a laser pointer is set.

FIG. 5 is a plan view of a PSD light receiving unit on which a laser pointer is set.

FIG. 6 is a sectional view showing an internal switch of the laser pointer.

FIG. 7 is a side view showing an installation state of a PSD light receiving section.

[Explanation of symbols]

10 ... Screen (screen means) 20. Liquid crystal projector (projection means) 50 ... Laser pointer 57 ... Internal switch (switch means) 70 ... PSD 71 ... PSD light receiving section (detection means) 72 ... Recess (laser pointer setting part) 73 ... Protrusion (switch means)

Claims (4)

[Claims] 1. A laser pointer which projects a laser beam in a laser pointer mode and an infrared beam in the same direction as the laser beam in a mouse mode, and a projection position of the infrared beam projected on a screen means. A detecting means; and a projecting means for projecting a mouse image on the screen means based on movement data including a moving direction and a moving distance of the projection position of the infrared light on the screen means detected by the detecting means. In a presentation system using a laser pointer, the detection means is provided with a laser pointer setting section to which the laser pointer is detachably set, and laser light is emitted from the laser pointer set in the laser pointer setting section to the screen means. By projecting towards
A presentation system using a laser pointer, characterized in that the position of the detection means with respect to the screen means is set using the spot of the laser light on the screen means as an index. 2. The presentation system using a laser pointer according to claim 1, wherein the spot of the laser light is a line extending in a horizontal direction or a vertical direction. 3. The laser pointer and the detection means are provided with a switch means for projecting a laser beam from the laser pointer with the laser pointer set in the laser pointer setting section. A presentation system using the laser pointer according to Item 1 or 2. 4. The presentation system using a laser pointer according to claim 1, wherein the detecting means is a PSD.