JP3100163U - Projector shading device and projector provided with the device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable local light shielding, not to affect use of a front white board, and to make it easy for an operator to determine whether or not a projector is in a normal operation state.
A light-shielding device for use in a projector is provided, which includes a light-shielding piece having at least one penetration, the light-shielding piece being installed in a projection light path in the projector, and shielding the projection of the projector. Most of the projection light is blocked, and a small portion of the projection light is transmitted through the penetrating portion of the light shielding piece and emitted.
[Selection diagram] FIG.

Description

The present invention relates to a kind of projector shading device, and more particularly, to a projector shading device having a local shading function.

Generally, when using a projector, a whiteboard is almost always combined, and when using a whiteboard, the projector must be blocked (blank) to prevent projection light from affecting the display of the whiteboard. Even if it says "shading", in the case of a digital projector, the shading method is that the projection light is turned by an optical engine and separated from the projection direction, and is usually reflected on the upper or lower lid of the optical engine, and the projection light is converted into a lens. Avoid more projection. However, if the projection lens is completely shielded, the operator cannot accurately judge whether the projector is in the on state or not, and the projectors are repeatedly started. Also easy to form.

In view of the drawbacks of the known technology, a main object of the present invention is to provide a kind of projector light shielding device. The feature is that local light can be shielded, the use of the whiteboard in front is not affected, and the operator can easily determine whether the projector is in a normal operation state.

The invention of claim 1 comprises a light blocking piece provided in the projection light path of the projector and having at least one penetrating part, wherein the light blocking piece blocks most of the projection light in the projection light path, A projector light-shielding device is characterized in that projection light passes through the penetrating portion and is emitted.
According to a second aspect of the present invention, there is provided the projector light-shielding device according to the first aspect, wherein the penetrating portion of the light-shielding piece is located below the effective projection area.
According to a third aspect of the invention, there is provided the projector light-shielding device according to the second aspect, wherein the penetrating portion of the light-shielding piece is located at a lower left corner or a lower right corner of the effective projection area.
The invention according to claim 4 is characterized in that the light shielding piece is movably provided in the projection light path, and the position of the light shielding piece can be adjusted manually or by a driving device so as to block the projection light path. It is the projector light shielding device described in the above.
According to a fifth aspect of the present invention, there is provided the projector light-shielding device according to the fourth aspect, wherein the light-shielding piece is pivotally mounted on the case of the projector, and rotates or pivots around the pivot to block or release the projection light.
According to a sixth aspect of the invention, there is provided the projector light-shielding device according to the fourth aspect, wherein the light-shielding piece is installed in a case of the projector and slides back and forth to block or release the projection light.
The invention according to claim 7 is the projector light-shielding device according to claim 4, wherein the driving device is a remote controller and is combined with a remote control circuit to drive the light-shielding piece.
According to the invention of claim 8, the light-shielding device is a light-shielding piece module, and the light-shielding piece module is disposed on the projector in a moving manner and has at least one penetrating portion, a control switch, and a light-shielding piece. It has an open detection unit that detects the open position, a close detection unit that detects the closed position of the light blocking piece, and a transmission that drives and moves the light blocking piece. When the piece is driven to move and the light-shielding piece comes into contact with the open detection unit, the open detection unit stops the transmission of the transmission to stop the movement of the light-shielding piece, and the light-shielding piece releases the projection light, and the projection light Is projected outside the projector, and when the light shielding piece contacts the closing detection unit, the closing detection unit stops the transmission of the transmission device and stops moving to the light shielding piece, and the light is blocked. There wherein the emit by passing through portions of the light shielding piece to cut off a large part of the projected light to a small portion of the projected light, the projector light-shielding device according to claim 1.
According to a ninth aspect of the present invention, the light shielding piece module includes a control unit, and the light shielding piece, the control switch, the open detection unit, the closing detection unit, and the transmission are connected to the control unit, and the control unit outputs the opening signal, the closing signal, 9. The projector light-shielding device according to claim 8, wherein an opening stop signal and a closing stop signal are received.
According to a tenth aspect of the present invention, the transmission includes a gear and teeth disposed on a portion of the light-shielding piece corresponding to the gear, and the meshing between the gear and the tooth drives and moves the light-shielding piece when the gear rotates. A projector light-shielding device according to claim 8, wherein:
The invention according to claim 11 is characterized in that the transmission device comprises a guide device, and the transmission device drives the light shielding piece to reciprocate on the guide device to block or release the projection light. It is a projector light blocking device.
According to a twelfth aspect of the present invention, there is provided the projector light-shielding device according to the eleventh aspect, wherein the guide device is two mutually parallel guide rods.
The invention according to claim 13 is the projector light-shielding device according to claim 8, wherein the light-shielding piece has a convex portion, and the convex portion comes into contact with the open detection unit or the close detection unit.
The invention according to claim 14 is the projector light-shielding device according to claim 8, wherein the light-shielding piece module further includes a remote control circuit to provide driving in a remote control system.
According to the invention of claim 15, a light shielding device connects a plurality of light shielding pieces in series to a fixed shaft, and the plurality of light shielding pieces are rotatable at an appropriate angle in synchronization with each other, whereby the light shielding device is installed in an optical path. The projector light-shielding device according to claim 1, wherein the direction of the projection light is shifted by the angular rotation of the light-shielding piece.
The invention according to claim 16 is the projector light shielding device according to claim 15, wherein the rotation angle of the light shielding piece is adjusted manually or by a driving device.
The invention according to claim 17 is the projector light-shielding device according to claim 16, wherein the driving device is a remote controller and is combined with a remote control circuit.
The invention according to claim 18 comprises a light-shielding device provided in the projection optical path of the projector and having a light-shielding piece, the light-shielding piece has a penetrating portion, and the light-shielding piece blocks most of the projection light. The projector is characterized in that a part of the light shielding piece is emitted through the penetrating part.
The invention according to claim 19 is a projector according to claim 18, characterized in that the projector is provided with a heat radiating device that enhances the heat radiation efficiency when the light shielding piece blocks projection light.

The present invention solves the drawbacks of the well-known technology, and the projector shading device of the present invention can locally shield the light, does not affect the use of the front white board, and checks whether the projector is in a normal operating state. It is easy to determine whether or not it is.

As shown in FIGS. 1 and 2, the digital projector 10 includes a case 11, in which a light source 12, a digital micro-mirror device 14 (DMD; Digital Micro-mirror Device), an optical engine 13, a lens 15, and a control. A projection light is provided from a light source 12, is reflected by an optical engine 13, and is reflected and controlled to reach a digital micromirror device 14. The projection light is further emitted from a lens 15 to emit a whiteboard or screen. Projected above to form a continuous light path A, B, C, D. Due to the characteristics of the light path, according to the present invention, a light shielding device that blocks most of the projection light and transmits small one of the projection light is installed in an arbitrary projection path of the optical paths A, B, C, and D. You. There are many types of embodiments of the light-shielding device. As shown in FIG. 3, the light-shielding piece 20 is installed in front of the lens 15, and the size of the light-shielding piece 20 can completely cover the lens 15. Then, the penetrating portion 21 may be provided in a portion of the light shielding piece 20 corresponding to the effective projection area 151 of the lens 15. In this embodiment, the penetrating portion 21 is installed at the lower right corner of the effective projection area 151. Of course, it is also possible to install the camera at the lower left corner of the effective projection area 151 or at another position. Although the number is not limited to one, according to general operation habits, the penetrating portion 21 is installed at the lower right corner of the effective projection area 151, and the number is one. Further, when the projector 10 is in the light shielding state, the heat radiation device 17 can be driven to enhance heat radiation.

Further, as shown in FIG. 4, the projector 10 is placed at an appropriate distance in front of the whiteboard 30, the front of the lens 15 is shielded by the light shielding piece 20, most of the projection light is blocked, and Light is emitted through the penetrating portion 21 of the light shielding piece 20. As a result, the display of most of the area of the whiteboard 30 is a dark area 31 (shaded area), and a slightly lower left corner of the whiteboard (mirror projection of the lower right corner of the effective projection area 151) is a bright area 32. The display of the bright zone 32 is advantageous for the operator to determine whether the projector 10 is in the activated state.

結合 There are many types of coupling methods between the light-shielding piece 20 and the projector 10 and operating methods of the light-shielding piece 20, but a preferred embodiment will be described here.

First, as shown in FIG. 5, the light shielding piece 120 has a flat single piece shape, and a penetrating portion 121 is provided in the light shielding piece 120, and the light shielding piece 120 is inserted into a slide groove 111 of the case 11 of the projector 10. When fitted, the light-shielding piece 120 can slide in the slide groove 111, whereby the light-shielding piece 120 can cover or release the lens 15. When the light shielding piece 120 shields the front of the lens 15, most of the projection light projected from the lens 15 is blocked, and a small part of the projection light is emitted from the penetrating portion 121, whereby the white board 30 shown in FIG. An upward projection effect can be formed. The method of driving and sliding the light shielding piece 120 is a manual method, or a method in which a remote control circuit is provided in the projector 10 and controlled by a remote controller. It is possible to combine a bearing or a gear in the sliding groove 111. Since this is a well-known technique, the description is omitted.

In the embodiment of FIG. 6, the light shielding piece 220 has a flat single piece shape, a penetration portion 221 is provided in the light shielding piece 220, and the light shielding piece 220 is pivotally connected to the pivot 112 provided in the case 11 of the projector 10. Accordingly, the light shielding piece 220 is rotatable about the pivot 112, and the light shielding piece 220 thereby covers or releases the lens 15. When the light shielding piece 220 covers the front of the lens 15, most of the projection light projected from the lens 15 is blocked, and a small part of the projection light is emitted from the through portion 221, whereby the whiteboard 30 shown in FIG. An upward projection effect can be formed. The rotation of the light shielding piece 220 is controlled manually or by a remote control circuit installed in the projector 10 by a remote controller.

FIG. 7 is a schematic view showing another embodiment of the present invention. A light shielding piece module 320 is installed inside the case 11 of the projector 10, and the light shielding piece module 320 includes a light shielding piece 321, a control switch 322, a control unit 323, an open detection unit 324, and a closing detection unit 325. Driven by the transmission 326 to cover or release the lens 15, the light shielding piece 321, the control switch 322, the open detection unit 324, the closing detection unit 325, and the transmission 326 are all connected to the control unit 323, and the control switch 322. Is turned on, the power supply communicates and the control unit 323 operates.

The transmission 326 includes two guide rods 3261 and 3262 parallel to each other. The guide rods 3261 and 3262 are positioned in the case 11 by fixed columns 3263 and provided on both sides of the lens 15. A gear 3264 is provided on one side, and teeth 3212 are provided on a side edge of the light shielding piece 321 facing the gear 3264. When the gear 3264 rotates clockwise or counterclockwise, the light shielding piece 321 is driven by the teeth 3212 to reciprocate in the same direction as the guide rods 3261 and 3262 on the guide rods 3261 and 3262. Covers or releases the lens 15. The penetrating portion 21 is provided in a position corresponding to the effective projection area 151 of the lens 15 in the light shielding piece 321.

A convex portion 3213 is provided on an appropriate portion of the light shielding piece 321 on one side facing the open detection unit 324 and the closing detection unit 325, and the light shielding piece 321 does not cover the lens 15, that is, the light shielding piece 321 is a lens. 15, the protrusion 3213 contacts the opening detection unit 324, and the opening detection unit 324 detects that the light shielding piece 321 has reached the opening position, and thereby sends an opening stop signal to the control unit 323. Then, the control unit 323 controls the gear 3264 to stop the rotation, and the light shielding piece 321 stops moving. When the projection 3213 contacts the closing detection unit 325 when the light shielding piece 321 moves down and covers the lens 15, the closing detection unit 325 detects that the light shielding piece 321 has already reached the closing position, and stops closing. A signal is sent to the control unit 323, the gear 3264 stops rotating under the control of the control unit 323, and the light shielding piece 321 also stops moving. Briefly, in this embodiment, the light-shielding piece 321 is provided with teeth 3212 that mesh with the gear 3264, and the gear 3264 drives and moves the light-shielding piece 321 to cover or release the lens 15. When the light is covered, most of the projected light that passes through the lens 15 and is projected is blocked, and a small portion of the projected light is emitted from the penetrating portion 3211. Thus, the effect of the projection onto the white board 30 shown in FIG. To form The light-blocking module 320 further includes a remote control circuit and can be used for remote control by an operator.

Please refer to FIG. 8 and FIG. In this embodiment, a light shielding device 420 such as a blind is installed. That is, a plurality of light shielding pieces 421 are connected in series to a fixed shaft 422, and the light shielding pieces 421 are controlled to rotate synchronously with the fixed shaft 422 as an axis. Either an exit space is provided or the projection direction of the projection light L is modified. As shown in FIG. 9, when the projection light L is horizontally emitted, the light shielding piece 421 is adjusted so as to rotate synchronously upward to assume a substantially horizontal state. When the light-shielding piece 421 is rotated downward by an appropriate angle synchronously, the projection light L changes its direction by blocking the light-shielding piece 421, and when the light-shielding piece 421 has high reflectivity, the projection light L L is completely reflected at another angle, and when the reflectivity of the light shielding piece 421 is relatively low, a part of the projection light L disappears and only a part of the projection light L is reflected. In any case, the filling in this embodiment is to change the projection direction of the projection light L by controlling the angle of the light shielding piece 421 of the light shielding device 420. Generally, when the projection is performed by the projector, the projection direction of the projection light L Is preferably horizontal or slightly higher than the horizontal direction, and the direction of the projection light L is preferably controlled to be lower than the direction of the screen to be projected. Of course, the projection light L can be directed in other directions by rotating the light shielding piece 421 to another angle, but it is preferable that the projection light L is directed downward. Thereby, after changing the projection direction of the projection light L, the projection light L is projected below the whiteboard or the screen, which is advantageous for the operator to determine that the projector is in the operating state. In addition, it is possible to install a penetration part (not shown) of an appropriate size or quantity on the light shielding piece 421, and a small part of the projection light is emitted from the penetration part and projected on a white board or a screen, as shown in FIG. The effect of projection on the whiteboard 30 can be formed. The light-shielding device 420 can be controlled manually or by providing a remote control circuit in the projector 10 to control the rotation of the light-shielding piece 421 by a remote controller.

According to the present invention, a light-blocking device is installed in the light path of the projector, and the light blocking device blocks most of the projected light and transmits a small portion of the projected light, or changes the direction of the projected light. Can easily determine the operation state of the projector. The present invention can be applied to digital projectors and other types of projectors. The digital projector is only an embodiment of the present invention, and does not limit the scope of the present invention, but can be based on the present invention. Any modification or alteration of details shall fall within the scope of the present invention.

It is a display diagram of the internal structure of a known projector. It is a light path display figure of a well-known projector. FIG. 3 is a display diagram in which the present invention is combined with a lens of a projector. FIG. 4 is a light-shielding state display diagram of the present invention. FIG. 4 is a view showing an embodiment in which the light shielding piece of the present invention and the case of the projector are combined. FIG. 5 is a view showing another embodiment in which the light shielding piece of the present invention and the case of the projector are combined. FIG. 4 is a schematic view showing the structure of the light shielding piece module according to the present invention. FIG. 4 is a schematic diagram showing another embodiment of the light shielding device according to the present invention. FIG. 4 is a schematic diagram showing another embodiment of the light shielding device according to the present invention.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 10 Projector 11 Case 111 Sliding groove 112 Axis 12 Light source 13 Optical engine 14 Digital micromirror device 15 Lens 151 Effective projection area 16 Control circuit 17 Heat radiating device 20, 120, 220 Shielding pieces 21, 121, 221 Penetration part 30 White board 31 Dark Section 32 Light section 320 Light shielding piece module 321 Light shielding piece 3211 Penetration part 3212 Teeth 3213 Convex part 322 Control switch 323 Control unit 324 Open detection unit 325 Closing detection unit 326 Transmission devices 3261, 3262 Guide rod 3263 Fixed column 3264 Gear 420 Light shielding device 421 Light shielding piece 422 Fixed axes A, B, C, D Light path L Projection light

Claims (19)

A light-shielding piece provided in the projection optical path of the projector and having at least one through-hole is provided, the light-shielding piece blocks most of the projection light in the projection optical path, and the small-part projection light passes through the through-hole. A light-shielding device for a projector, characterized in that the light is passed through and emitted. 2. The projector light-shielding device according to claim 1, wherein the penetrating portion of the light-shielding piece is located below the effective projection area. 3. The projector light-shielding device according to claim 2, wherein the penetrating portion of the light-shielding piece is located at a lower left corner or a lower right corner of the effective projection area. 2. The projector light-shielding device according to claim 1, wherein the light-shielding piece is movably provided in the projection optical path, and the position of the light-shielding piece can be adjusted manually or by a driving device so as to shield the projection optical path. 5. The projector light-shielding device according to claim 4, wherein the light-shielding piece is pivotally mounted on a case of the projector, and rotates around a pivot to block or release the projection light. 5. The projector light-shielding device according to claim 4, wherein the light-shielding piece is installed in the case of the projector and slides back and forth to block or release the projection light. 5. The projector light-shielding device according to claim 4, wherein the driving device is a remote controller and drives the light-shielding piece in combination with a remote control circuit. The light-shielding device is a light-shielding piece module, and the light-shielding piece module is disposed on the projector in a moving manner and has a light-shielding piece having at least one penetrating portion, a control switch, and an open detection for detecting an open position of the light-shielding piece. A unit, a closing detection unit for detecting a closing position of the light shielding piece, and a transmission for driving and moving the light shielding piece, and the transmission is operated by the control of the control switch to drive and move the light shielding piece. When the light-shielding piece contacts the opening detection unit, the opening detection unit stops the transmission of the transmission to stop the movement of the light-shielding piece, the light-shielding piece releases the projection light, and the projection light is projected outside the projector. When the light-shielding piece comes into contact with the closing detection unit, the closing-detection unit stops the transmission of the transmission and stops moving to the light-shielding piece, and the light-shielding piece projects most of the light. Passed through a through portion of the light shielding piece to the projection light of the small portion cut off, characterized in that to emit, the projector light-shielding device according to claim 1. The light-shielding piece module includes a control unit, and the light-shielding piece, control switch, open detection unit, closing detection unit, and transmission device are connected to the control unit, and the control unit transmits an opening signal, a closing signal, an opening stop signal, and a closing stop signal. The projector light-shielding device according to claim 8, wherein the projector light-shielding device is received. The transmission is provided with a gear and a tooth disposed on a portion of the light-shielding piece corresponding to the gear, and the meshing of the gear and the tooth drives and moves the light-shielding piece when the gear rotates. Item 10. A projector light-shielding device according to Item 8. 9. The projector light-shielding device according to claim 8, wherein the transmission device includes a guide device, and the transmission device drives the light-shielding piece to reciprocate on the guide device to block or release the projection light. 12. The projector light-shielding device according to claim 11, wherein the guide device comprises two mutually parallel guide rods. 9. The projector light-shielding device according to claim 8, wherein the light-shielding piece has a convex portion, and the convex portion comes into contact with the opening detection unit or the closing detection unit. 9. The projector light-shielding device according to claim 8, wherein the light-shielding piece module further includes a remote control circuit to provide driving by a remote control method. A light-shielding device connects a plurality of light-shielding pieces in series to a fixed shaft, and the plurality of light-shielding pieces can be synchronously rotated at an appropriate angle, whereby the light-shielding device is installed in the optical path, and the light-shielding pieces are rotated at an angle. The projector light-shielding device according to claim 1, wherein the direction of the projection light is shifted by performing the operation. 16. The projector light-shielding device according to claim 15, wherein the rotation angle of the light-shielding piece is adjusted manually or by a driving device. 17. The projector light-shielding device according to claim 16, wherein the driving device is a remote controller and is combined with a remote control circuit. A light-shielding device is provided in the projection optical path of the projector and includes a light-shielding piece, the light-shielding piece has a penetrating portion, most of the projection light is blocked by the light-shielding piece, and a small portion of the light-shielding piece is penetrated. Characterized by being projected through a projector. 19. The projector according to claim 18, further comprising a heat radiating device for increasing heat radiation efficiency when the light shielding piece blocks projection light.

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