CN107463059B - Projection system and light curtain generating device thereof - Google Patents
Projection system and light curtain generating device thereof Download PDFInfo
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- CN107463059B CN107463059B CN201610389930.XA CN201610389930A CN107463059B CN 107463059 B CN107463059 B CN 107463059B CN 201610389930 A CN201610389930 A CN 201610389930A CN 107463059 B CN107463059 B CN 107463059B
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
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Abstract
The invention discloses a projection system and a light curtain generating device thereof. The light curtain generating device comprises a movable bearing module, a first light-emitting module and a second light-emitting module. The first light-emitting module comprises a plurality of first light-emitting structures arranged on the movable bearing module. Each first light-emitting structure generates an invisible light curtain, and the invisible light curtains generated by the first light-emitting structures are matched with each other to form a spliced invisible light curtain for improving the light uniformity. The second light-emitting module comprises a second light-emitting structure arranged on the movable bearing module, and the second light-emitting structure generates a visible light curtain which is parallel to and overlapped with the spliced invisible light curtain. Therefore, the light uniformity of the spliced invisible light curtain can be improved by using the plurality of first light-emitting structures.
Description
Technical Field
The present invention relates to a projection system and a light curtain generating device thereof, and more particularly, to a projection system for improving the uniformity of an invisible light curtain and a light curtain generating device thereof.
Background
The interactive projection system is a projection system for a user to perform touch operation on a projection surface. The invisible light curtain emitted by the light source device covers the whole projection surface, so that when a user carries out interactive touch control on a projection picture on the projection surface, the invisible light curtain can be reflected by a touch object and generate a reflected light beam, and the invisible light detection device is used for receiving the reflected light beam and detecting a touch position so as to generate a corresponding touch signal.
The distance between the invisible light curtain and the projection surface influences the touch operation. Specifically, if the distance between the invisible light curtain and the projection surface is too large, a user may easily place a touch object in an area between the invisible light curtain and the projection surface during touch input on the projection surface, so that the light detection device detects an erroneous touch position and generates an unintended touch signal. On the contrary, if the distance between the invisible light screen and the projection surface is too small, the reflected light beam is easily blocked by the touch object when the user performs touch input on the projection surface, so that the light detection device cannot generate a touch signal because the touch position cannot be accurately detected. Accordingly, the distance between the invisible light screen and the projection plane must be adjusted to an appropriate value so that the touch input can be performed normally.
However, the non-visible light curtains provided by the prior art have insufficient uniformity, and especially the light curtain that is scanned over the left and right portions of the projection surface is too dark to uniformly cover the entire projection area. Therefore, how to overcome the above-mentioned deficiencies by improving the structural design has become one of the important issues to be solved by the industry.
Disclosure of Invention
The present invention provides a projection system and a light curtain generating device thereof, which are directed to overcome the disadvantages of the prior art.
In order to solve the above technical problem, one of the technical solutions of the present invention is to provide a light curtain generating device applied to a projection curtain, the light curtain generating device including: the light-emitting module comprises a movable bearing module, a first light-emitting module and a second light-emitting module. The first light-emitting module comprises a plurality of first light-emitting structures arranged on the movable bearing module, each first light-emitting structure generates an invisible light curtain, and the invisible light curtains generated by the first light-emitting structures are mutually matched to form a spliced invisible light curtain for improving the light uniformity; the second light-emitting module comprises a second light-emitting structure arranged on the movable bearing module, wherein the second light-emitting structure generates a visible light curtain which is parallel to and overlapped with the spliced invisible light curtain; the spliced invisible light curtain and the visible light curtain both correspond to a projection area of the projection screen, and the first light-emitting module and the second light-emitting module synchronously adjust the parallelism of the visible light curtain and the spliced invisible light curtain relative to the projection area of the projection screen through the movement of the movable bearing module; wherein, the visible light curtain is pressed close to and covers the projection screen the projection area is in order to judge the projection screen the roughness of projection area.
Furthermore, the movable carrier module includes a movable carrier for carrying the first light emitting module and the second light emitting module, and an adjusting mechanism disposed on the movable carrier, and the adjusting mechanism includes a pivot joint type fulcrum structure, a levelness adjusting structure for adjusting the levelness of the movable carrier relative to the projection area, and an inclination adjusting structure for adjusting the inclination of the movable carrier relative to the projection area.
Furthermore, pin-jointed fulcrum structure has a fixed part of fixing on a shell body and a connection connect in fixed part and movably holding are in movable bears a pin joint portion of inslot of seat, levelness adjustment structure includes one and passes the shell body and movable bears a first adjusting bolt and one set of the seat of establishing and is in on the first adjusting bolt the shell body with movable bears a first elastic component between the seat, just gradient adjustment structure includes one and passes the shell body and movable bears a second adjusting bolt and one set of the seat of establishing and is in on the second adjusting bolt the shell body with movable bears a second elastic component between the seat.
Furthermore, the distance between the visible light curtain and the projection area of the projection curtain is a predetermined distance, and the visible light curtain is detected above the projection area of the projection curtain so as to judge whether the projection area of the projection curtain is warped to contact the visible light curtain.
Furthermore, the distance between the visible light curtain and the projection area of the projection curtain is a preset distance, and the visible light curtain is detected above the projection area of the projection curtain to judge whether the projection area of the projection curtain is contacted with the bulge of the visible light curtain.
Furthermore, the first light-emitting module includes a middle light-emitting structure for generating a middle invisible light curtain, a left light-emitting structure for generating a left oblique invisible light curtain, and a right light-emitting structure for generating a right oblique invisible light curtain.
Further, the left light emitting structure is disposed obliquely with respect to the middle light emitting structure and located beside the left side of the middle light emitting structure, the right light emitting structure is disposed obliquely with respect to the middle light emitting structure and located beside the right side of the middle light emitting structure, the middle invisible light curtain corresponds to a middle portion of the projection region, the left oblique invisible light curtain partially overlaps with the middle invisible light curtain and corresponds to a left portion of the projection region, and the right oblique invisible light curtain partially overlaps with the middle invisible light curtain and corresponds to a right portion of the projection region.
Furthermore, each of the first light-emitting structures includes an infrared light-emitting component and a first cylindrical mirror disposed in front of the infrared light-emitting component, and the second light-emitting structure includes a red light-emitting component and a second cylindrical mirror disposed in front of the red light-emitting component.
Furthermore, the light curtain generating device and a projection device arranged in front of the projection screen are separated from each other, the projection device comprises a wireless signal transmitter, and the light curtain generating device comprises a wireless signal receiver corresponding to the wireless signal transmitter.
In order to solve the above technical problem, another technical solution of the present invention is to provide a projection system, including: a projection screen, a projection device and a light screen generating device. The projection screen is provided with a projection area; the projection device is arranged in front of the projection screen, and the projection device projects an image light source on the projection area of the projection screen; and the light curtain generating device is arranged above the projection area of the projection curtain, wherein the light curtain generating device comprises: the light-emitting module comprises a movable bearing module, a first light-emitting module and a second light-emitting module. The first light-emitting module comprises a plurality of first light-emitting structures arranged on the movable bearing module, each first light-emitting structure generates an invisible light curtain, and the invisible light curtains generated by the first light-emitting structures are mutually matched to form a spliced invisible light curtain for improving the light uniformity; the second light-emitting module comprises a second light-emitting structure arranged on the movable bearing module, wherein the second light-emitting structure generates a visible light curtain which is parallel to and overlapped with the spliced invisible light curtain; the spliced invisible light curtain and the visible light curtain both correspond to the projection area of the projection screen, and the first light-emitting module and the second light-emitting module synchronously adjust the parallelism of the visible light curtain and the spliced invisible light curtain relative to the projection area of the projection screen through the movement of the movable bearing module; wherein, the visible light curtain is pressed close to and covers the projection screen the projection area is in order to judge the projection screen the roughness of projection area.
Furthermore, the projection device and the light curtain generating device are separated from each other, the projection device comprises a projection lens and a wireless signal transmitter, and the light curtain generating device comprises a wireless signal receiver corresponding to the wireless signal transmitter.
Furthermore, the projection device provides a lens opening and closing time sequence signal of the projection lens, the lens opening and closing time sequence signal of the projection lens is wirelessly transmitted to the wireless signal receiver through the wireless signal transmitter, and the light curtain generating device opens or closes the first light-emitting module according to the lens opening and closing time sequence signal received by the wireless signal receiver.
Furthermore, the movable carrier module includes a movable carrier for carrying the first light emitting module and the second light emitting module, and an adjusting mechanism disposed on the movable carrier, and the adjusting mechanism includes a pivot joint type fulcrum structure, a levelness adjusting structure for adjusting the levelness of the movable carrier relative to the projection area, and an inclination adjusting structure for adjusting the inclination of the movable carrier relative to the projection area.
Furthermore, pin-jointed fulcrum structure has a fixed part of fixing on a shell body and a connection connect in fixed part and movably holding are in movable bears a pin joint portion of inslot of seat, levelness adjustment structure includes one and passes the shell body and movable bears a first adjusting bolt and one set of the seat of establishing and is in on the first adjusting bolt the shell body with movable bears a first elastic component between the seat, just gradient adjustment structure includes one and passes the shell body and movable bears a second adjusting bolt and one set of the seat of establishing and is in on the second adjusting bolt the shell body with movable bears a second elastic component between the seat.
Furthermore, the distance between the visible light curtain and the projection area of the projection curtain is a predetermined distance, and the visible light curtain is detected above the projection area of the projection curtain so as to judge whether the projection area of the projection curtain is warped to contact the visible light curtain.
Furthermore, the distance between the visible light curtain and the projection area of the projection curtain is a preset distance, and the visible light curtain is detected above the projection area of the projection curtain to judge whether the projection area of the projection curtain is contacted with the bulge of the visible light curtain.
Furthermore, the first light-emitting module includes a middle light-emitting structure for generating a middle invisible light curtain, a left light-emitting structure for generating a left oblique invisible light curtain, and a right light-emitting structure for generating a right oblique invisible light curtain.
Further, the left light emitting structure is disposed obliquely with respect to the middle light emitting structure and located beside the left side of the middle light emitting structure, the right light emitting structure is disposed obliquely with respect to the middle light emitting structure and located beside the right side of the middle light emitting structure, the middle invisible light curtain corresponds to a middle portion of the projection region, the left oblique invisible light curtain partially overlaps with the middle invisible light curtain and corresponds to a left portion of the projection region, and the right oblique invisible light curtain partially overlaps with the middle invisible light curtain and corresponds to a right portion of the projection region.
Furthermore, each of the first light-emitting structures includes an infrared light-emitting component and a first cylindrical mirror disposed in front of the infrared light-emitting component, and the second light-emitting structure includes a red light-emitting component and a second cylindrical mirror disposed in front of the red light-emitting component.
The projection system and the light curtain generating device thereof provided by the technical scheme of the invention have the beneficial effects that the design of the spliced invisible light curtain for improving the light uniformity can be formed by the fact that the first light-emitting module comprises a plurality of first light-emitting structures arranged on the movable bearing module, each first light-emitting structure generates the invisible light curtain, and the invisible light curtains generated by the first light-emitting structures are matched with each other, so that the spliced invisible light curtain can uniformly correspond to and cover the whole projection area of the projection screen, the condition that the light curtain cannot uniformly cover the whole projection area due to over-dark partial area is avoided, and the light uniformity of the spliced invisible light curtain is favorably improved.
Furthermore, in the projection system and the light curtain generating device thereof provided by the technical solution of the present invention, the second light emitting module comprises a second light emitting structure disposed on the movable carrying module, and the second light emitting structure generates a visible light curtain parallel to and overlapping with the spliced invisible light curtain and a design of "the visible light curtain is close to and covers the projection area of the projection curtain, so as to determine the flatness of the projection area of the projection curtain", thereby facilitating to improve the flatness of the projection area of the projection curtain.
Furthermore, the projection system and the light curtain generating device thereof provided by the technical solution of the present invention, the projection device comprises a projection lens and a wireless signal transmitter, the light curtain generating device comprises a wireless signal receiver corresponding to the wireless signal transmitter, and the lens opening and closing time sequence signal of the projection lens passes through the wireless signal transmitter, wirelessly transmitted to the wireless signal receiver, and the light curtain generating device is used for generating a timing sequence signal according to the opening and closing of the lens received by the wireless signal receiver, the first light-emitting module is turned on or off, so that the projection lens of the projection apparatus and the first light-emitting module of the light curtain generating apparatus can be turned on and off synchronously according to the lens turn-on and turn-off timing signals.
For a better understanding of the features and technical content of the present invention, reference should be made to the following detailed description of the invention and accompanying drawings, which are provided for purposes of illustration and description only and are not intended to limit the invention.
Drawings
Fig. 1 is a perspective view of a light curtain generating device according to the present invention.
FIG. 2 is a schematic side view of a light curtain generating device according to the present invention.
FIG. 3 is another side view of the light curtain generating device of the present invention.
Fig. 4 is a schematic top view illustrating the light curtain generating device of the present invention temporarily removing a portion of the movable carrying base and generating a non-visible light curtain by each of the first light emitting structures.
Fig. 5 is a schematic top view illustrating that the first light-emitting module and the second light-emitting module of the light curtain generating device respectively generate a spliced invisible light curtain and a visible light curtain.
Fig. 6 is a schematic side view of a visible light curtain generated by the second light-emitting module of the light curtain generating device according to the present invention.
Fig. 7 is another side view of the second light-emitting module of the light curtain generating device of the present invention for generating a visible light curtain.
Fig. 8 is a schematic top view of a visible light curtain generated by the second light emitting module of the light curtain generating device of the invention projected on a warping position.
Fig. 9 is a schematic top view of a projection projected by a visible light curtain generated by a second light-emitting module of the light curtain generating device of the invention.
FIG. 10 is a schematic side view of a projection system according to the present invention.
FIG. 11 is a schematic top view of a projection apparatus and a light curtain generator of the projection system of the present invention.
Detailed Description
The following description is provided for the purpose of describing the embodiments of the present disclosure, and the technical solutions and advantages of the present disclosure will become apparent to those skilled in the art from the present disclosure. The invention is capable of other and different embodiments and its several details are capable of modification in various other respects, all without departing from the spirit and scope of the present invention. The drawings of the present invention are for illustrative purposes only and are not drawn to scale. The following embodiments will further explain the technical contents related to the present invention in detail, but the disclosure is not intended to limit the technical scope of the present invention.
Referring to fig. 1 to 9, the present invention provides a light curtain generating device D, which can be applied to a projection screen C, and the projection screen C has a projection area C10. The light curtain generating device D at least includes a movable carrier module 1, a first light-emitting module 2 and a second light-emitting module 3.
First, referring to fig. 1 and fig. 4, the movable carrier module 1 includes a movable carrier 10 for carrying the first light-emitting module 2 and the second light-emitting module 3, and an adjusting mechanism 11 disposed on the movable carrier 10. In addition, the adjusting mechanism 11 includes a pivot structure 111, a horizontal degree adjusting structure 112 for adjusting the horizontal degree of the movable carrying seat 10 relative to the projection area C10, and an inclination adjusting structure 113 for adjusting the inclination of the movable carrying seat 10 relative to the projection area C10.
For example, referring to fig. 1 to fig. 3, the pivot structure 111 has a fixing portion 1111 fixed on an outer housing 4 and a pivot portion 1112 connected to the fixing portion 1111 and movably received in a pivot groove 1000 of the movable carrier 10. In addition, the horizontal degree adjusting structure 112 includes a first adjusting bolt 1121 penetrating through the outer housing 4 and the movable carrying seat 10, and a first elastic component 1122 sleeved on the first adjusting bolt 1121 and located between the outer housing 4 and the movable carrying seat 10, and the inclination degree adjusting structure 113 includes a second adjusting bolt 1131 penetrating through the outer housing 4 and the movable carrying seat 10, and a second elastic component 1132 sleeved on the second adjusting bolt 1131 and located between the outer housing 4 and the movable carrying seat 10.
Furthermore, as shown in fig. 1, fig. 4 and fig. 5, the first light-emitting module 2 includes a plurality of first light-emitting structures 20 disposed on the movable carrier module 1, each of the first light-emitting structures 20 generates an invisible light curtain L1, and a plurality of invisible light curtains L1 generated by the plurality of first light-emitting structures 20 are parallel to each other. In addition, the invisible light curtains L1 generated by the first light emitting structures 20 can cooperate and complement each other to form a tiled invisible light curtain L1 'for improving light uniformity, and the tiled invisible light curtain L1' corresponds to a projection area C10 of the projection screen C.
For example, as shown in fig. 1 and fig. 4, each of the first light-emitting structures 20 includes an infrared light-emitting device 201 and a first cylindrical mirror 202 disposed in front of the infrared light-emitting device 201, and the infrared light beams generated by the infrared light-emitting device 201 can pass through the first cylindrical mirror 202 to be spread into a non-visible light curtain L1 with a wide coverage. In addition, the first light-emitting module 2 includes a middle light-emitting structure 20A for generating a middle invisible light curtain L11, a left light-emitting structure 20B for generating a left oblique invisible light curtain L12, and a right light-emitting structure 20C for generating a right oblique invisible light curtain L13. In addition, the left light emitting structure 20B is disposed obliquely with respect to the middle light emitting structure 20A and is located beside the left side of the middle light emitting structure 20A, and the right light emitting structure 20C is disposed obliquely with respect to the middle light emitting structure 20A and is located beside the right side of the middle light emitting structure 20A.
As described above, as shown in fig. 4, the middle invisible light curtain L11 corresponds to a middle portion C101 of the projection area C10, the left oblique invisible light curtain L12 partially overlaps the middle invisible light curtain L11 and corresponds to a left portion C102 of the projection area C10, and the right oblique invisible light curtain L13 partially overlaps the middle invisible light curtain L11 and corresponds to a right portion C103 of the projection area C10. Therefore, since the middle invisible light curtain L11, the left oblique invisible light curtain L12 and the right oblique invisible light curtain L13 respectively correspond to and cover the middle portion C101, the left portion C102 and the right portion C103 of the projection area C10 on an average basis, the spliced invisible light curtain L1 'can correspond to and cover the whole projection area C10 of the projection screen C uniformly, so as to avoid the occurrence of the situation that the light curtain cannot cover the whole projection area C10 uniformly due to too dark partial areas, and to improve the light uniformity of the spliced invisible light curtain L1'.
In addition, as shown in fig. 1 and fig. 5, the second light emitting module 3 includes a second light emitting structure 30 disposed on the movable carrier module 1. The second light emitting structure 30 generates a visible light curtain L2 parallel to and overlapping the tiled invisible light curtain L1', and the visible light curtain L2 corresponds to the projection area C10 of the projection curtain C. For example, the second light emitting structure 30 includes a red light emitting device 301 and a second cylindrical mirror 302 disposed in front of the red light emitting device 301, and the red light beam generated by the red light emitting device 301 can pass through the second cylindrical mirror 302 to spread out into a visible light curtain L2 with a larger coverage.
Furthermore, as shown in fig. 1, fig. 2 and fig. 6, when the pivot-joint type pivot structure 111 and the tilt adjusting structure 113 serve as two pivots, the present invention can simply rotate clockwise or counterclockwise through the first adjusting bolt 1121 to adjust the levelness of the movable carrying seat 10 relative to the projection area C10 (as shown by the arrow in fig. 2). Therefore, the first light-emitting module 2 and the second light-emitting module 3 can synchronously adjust the levelness of the visible light curtain L2 and the spliced invisible light curtain L1' relative to the projection area C10 of the projection screen C by the movement of the movable carrying seat 10 of the movable carrying module 1. For example, the visible light curtain L2 shown by the dotted line in fig. 6 needs to be adjusted to the visible light curtain L2 shown by the solid line, so as to achieve the required levelness of the visible light curtain L2 and the tiled invisible light curtain L1', i.e. from the side view shown in fig. 6, the whole visible light curtain L2 is spaced from the projection area C10 of the projection curtain C by a predetermined distance H.
As described above, with reference to fig. 1, 3 and 7, when the pivot-joint type pivot structure 111 and the horizontal degree adjusting structure 112 serve as two pivots, the present invention can simply rotate clockwise or counterclockwise by the second adjusting bolt 1131 to adjust the inclination of the movable carrier 10 relative to the projection area C10 (as shown by the arrow in fig. 3). Therefore, the first light-emitting module 2 and the second light-emitting module 3 can synchronously adjust the inclination of the visible light curtain L2 and the spliced invisible light curtain L1' relative to the projection area C10 of the projection screen C by the movement of the movable carrying seat 10 of the movable carrying module 1. For example, the visible light curtain L2 shown by the dotted line in fig. 7 needs to be adjusted to the visible light curtain L2 shown by the solid line, so as to achieve the desired inclination of the visible light curtain L2 and the tiled invisible light curtain L1', i.e., from the side view of fig. 7, the whole visible light curtain L2 is spaced from the projection area C10 of the projection curtain C by a predetermined distance H.
Therefore, with reference to fig. 1 to 3, 6 and 7, the first light-emitting module 2 and the second light-emitting module 3 can synchronously adjust the parallelism (i.e., the levelness and the inclination) of the visible light curtain L2 and the spliced invisible light curtain L1 'relative to the projection area C10 of the projection curtain C by the movement of the movable carrier module 1 until the entire visible light curtain L2 and the entire spliced invisible light curtain L1' keep a predetermined distance H from the projection area C10 of the projection curtain C.
More specifically, as shown in fig. 8 and fig. 9, the visible light curtain L2 is closely adjacent to and covers the projection area C10 of the projection curtain C, so as to determine the flatness of the projection area C10 of the projection curtain C.
For example, as shown in fig. 6, 7 and 8, when the parallelism of the visible light curtain L2 with respect to the projection area C10 of the projection curtain C is adjusted (as shown in fig. 6 and 7), the visible light curtain L2 is detected above the projection area C10 of the projection curtain C to determine whether the projection area C10 of the projection curtain C contacts the visible light curtain L2 due to warping. In other words, when the projection area C10 is warped to form a warped portion B1, a portion of the visible light curtain L2 is projected on the warped portion B1, so that the visible light curtain L2 forms a dark area or a light-shielding area on the warped portion B1, and the dark area or the light-shielding area allows the user to determine the location of the projected area C10 of the projection screen C (i.e., the location of the warped portion B1), so that the user can flatten the warped portion B1, thereby improving the flatness of the projection area C10 of the projection screen C.
For another example, as shown in fig. 6, 7 and 9, when the parallelism of the visible light curtain L2 with respect to the projection area C10 of the projection curtain C is adjusted (as shown in fig. 6 and 7), the visible light curtain L2 is detected above the projection area C10 of the projection curtain C to determine whether there is a protrusion B2 contacting the visible light curtain L2 on the projection area C10 of the projection curtain C. In other words, when the projection area C10 has the protrusion B2, a portion of the visible light curtain L2 projects on the protrusion B2, so that the visible light curtain L2 forms a dark area or a shading area on the protrusion B2, and the dark area or the shading area allows the user to determine where the protrusion B2 is on the projection area C10 of the projection screen C, so that the user can clear the protrusion B2, thereby improving the flatness of the projection area C10 of the projection screen C.
Referring to fig. 1, 10 and 11, the present invention provides a projection system S, which includes: a projection screen C, a projection device P and a light screen generating device D. The projection screen C has a projection area C10. The projection device P is disposed in front of the projection screen C, and the projection device P can project an image light source P100 on a projection area C10 of the projection screen C. The light curtain generating device D is disposed above the projection area C10 of the projection screen C, and the light curtain generating device D includes a movable carrying module 1, a first light-emitting module 2 for generating a spliced invisible light curtain L1', and a second light-emitting module 3 for generating a visible light curtain L2.
Furthermore, as shown in fig. 10 and fig. 11, the projection device P and the light curtain generating device D are separated from each other, and no transmission line is provided between the projection device P and the light curtain generating device D. In addition, the projection apparatus P includes a projection lens P1 and a wireless signal transmitter P2, and the projection apparatus P can provide a lens turn-on and turn-off timing signal T of the projection lens P1 according to the turn-on and turn-off timing of the projection lens P1. In addition, the light curtain generating device D further includes a wireless signal receiver 5 disposed on the outer casing 4 and corresponding to the wireless signal transmitter P2.
Therefore, the lens opening and closing timing signal T of the projection lens P1 can be wirelessly transmitted to the wireless signal receiver 5 through the wireless signal transmitter P2, and the light curtain generating device D can open or close the first light emitting module 2 according to the lens opening and closing timing signal T received by the wireless signal receiver 5. In other words, the wireless signal transmitter P2 of the projection apparatus P and the wireless signal receiver 5 of the light curtain generating apparatus D are cooperated to wirelessly transmit the lens opening and closing timing signal T of the projection lens P1 to the light curtain generating apparatus D, so that the projection lens P1 of the projection apparatus P and the first light-emitting module 2 of the light curtain generating apparatus D can be synchronously opened and closed according to the lens opening and closing timing signal T.
In summary, the projection system S and the light curtain generating device D thereof provided by the present invention have the advantages that the first light-emitting module 2 includes a plurality of first light-emitting structures 20 disposed on the movable carrier module 1, and each of the first light-emitting structures 20 generates an invisible light curtain L1 "and the plurality of invisible light curtains L1 generated by the plurality of first light-emitting structures 20 cooperate with each other to form a spliced invisible light curtain L1 ' for improving light uniformity, so that the spliced invisible light curtain L1 ' can uniformly correspond to and cover the entire projection area C10 of the projection screen C, thereby avoiding the situation that the light curtain cannot uniformly cover the entire projection area C10" due to partial areas being too dark, and being beneficial to improving light uniformity of the spliced invisible light curtain L1 '.
Furthermore, the projection system S and the light curtain generating device D thereof provided by the present invention can determine the flatness of the projection area C10 of the projection screen C by "the second light emitting module 3 includes the second light emitting structure 30 disposed on the movable carrying module 1, and the second light emitting structure 30 generates the visible light curtain L2" parallel to and overlapping with the spliced invisible light curtain L1' and "the visible light curtain L2 is close to and covers the projection area C10 of the projection screen C" so as to improve the flatness of the projection area C10 of the projection screen C.
Furthermore, the projection system S and the light curtain generating device D thereof provided by the present invention, it can be obtained by that the projection device P comprises a projection lens P1 and a wireless signal transmitter P2, and the light curtain generating device D includes a wireless signal receiver 5 corresponding to the wireless signal transmitter P2 and the lens turn-on and turn-off timing signal T of the projection lens P1 passes through the wireless signal transmitter P2, wirelessly transmitted to the wireless signal receiver 5, and the light curtain generating device D turns on and off the timing signal T according to the lens received by the wireless signal receiver 5, the first light-emitting module 2 ″ is turned on or off, so that the projection lens P1 of the projection apparatus P and the first light-emitting module 2 of the light curtain generating apparatus D can be turned on and off synchronously according to the lens turn-on and turn-off timing signal T.
The disclosure is only a preferred embodiment of the invention, and is not intended to limit the scope of the claims, so that all equivalent technical changes made by using the contents of the specification and the drawings are included in the scope of the claims.
Claims (17)
1. A light curtain generating device applied to a projection curtain is characterized by comprising:
a movable bearing module;
the first light-emitting module comprises a plurality of first light-emitting structures arranged on the movable bearing module, each first light-emitting structure generates an invisible light curtain, and the invisible light curtains generated by the first light-emitting structures are mutually matched to form a spliced invisible light curtain for improving the light uniformity; and
the second light-emitting module comprises a second light-emitting structure arranged on the movable bearing module, wherein the second light-emitting structure generates a visible light curtain which is parallel to and overlapped with the spliced invisible light curtain;
the first light-emitting module and the second light-emitting module simultaneously move through the movable bearing module to synchronously adjust the parallelism of the visible light curtain and the spliced invisible light curtain relative to the projection area of the projection screen, wherein the second light-emitting structure comprises a single red light-emitting component and a second cylindrical lens arranged in front of the single red light-emitting component, and a red light beam generated by the single red light-emitting component passes through the second cylindrical lens to form the visible light curtain;
wherein the visible light curtain is close to and covers the projection area of the projection curtain so as to judge the flatness of the projection area of the projection curtain,
the movable bearing module comprises a movable bearing seat for bearing the first light-emitting module and the second light-emitting module and an adjusting mechanism arranged on the movable bearing seat, wherein the adjusting mechanism comprises a pin-joint type fulcrum structure, a levelness adjusting structure for adjusting the levelness of the movable bearing seat relative to the projection area and an inclination adjusting structure for adjusting the inclination of the movable bearing seat relative to the projection area.
2. The light curtain generating device as claimed in claim 1, wherein the pivot-joint type pivot structure has a fixing portion fixed on an outer housing and a pivot-joint portion connected to the fixing portion and movably received in a pivot-joint groove of the movable carrying seat, the levelness adjusting structure includes a first adjusting bolt passing through the outer housing and the movable carrying seat and a first elastic member sleeved on the first adjusting bolt and located between the outer housing and the movable carrying seat, and the gradient adjusting structure includes a second adjusting bolt passing through the outer housing and the movable carrying seat and a second elastic member sleeved on the second adjusting bolt and located between the outer housing and the movable carrying seat.
3. The light curtain generating device as claimed in claim 1, wherein the visible light curtain is spaced from the projected area of the projection curtain by a predetermined distance, and the visible light curtain is detected above the projected area of the projection curtain to determine whether the projected area of the projection curtain is warped to contact the visible light curtain.
4. The light curtain generating device as claimed in claim 1, wherein the visible light curtain is spaced from the projection area of the projection curtain by a predetermined distance, and the visible light curtain is detected above the projection area of the projection curtain to determine whether there is a protrusion contacting the visible light curtain on the projection area of the projection curtain.
5. The light curtain producing device as claimed in claim 1, wherein said first light-emitting module includes a middle light-emitting structure for producing a middle invisible light curtain, a left light-emitting structure for producing a left oblique invisible light curtain, and a right light-emitting structure for producing a right oblique invisible light curtain.
6. The light curtain generating device as recited in claim 5, wherein the left light emitting structure is disposed obliquely with respect to the middle light emitting structure and beside a left side of the middle light emitting structure, the right light emitting structure is disposed obliquely with respect to the middle light emitting structure and beside a right side of the middle light emitting structure, the middle non-visible light curtain corresponds to a middle portion of the projection area, the left oblique non-visible light curtain partially overlaps with the middle non-visible light curtain and corresponds to a left portion of the projection area, and the right oblique non-visible light curtain partially overlaps with the middle non-visible light curtain and corresponds to a right portion of the projection area.
7. The light curtain producing device as recited in claim 1, wherein each of the first light emitting structures includes an infrared light emitting element and a first cylindrical mirror disposed in front of the infrared light emitting element.
8. The light curtain producing device of claim 1, wherein the light curtain producing device is separate from a projection device disposed in front of the projection screen, the projection device includes a wireless signal transmitter, and the light curtain producing device includes a wireless signal receiver corresponding to the wireless signal transmitter.
9. A projection system, characterized in that the projection system comprises:
the projection screen is provided with a projection area;
the projection device is arranged in front of the projection screen and projects an image light source on the projection area of the projection screen; and
a light curtain generating device disposed above the projection area of the projection curtain, wherein the light curtain generating device comprises:
a movable bearing module;
the first light-emitting module comprises a plurality of first light-emitting structures arranged on the movable bearing module, each first light-emitting structure generates an invisible light curtain, and the invisible light curtains generated by the first light-emitting structures are mutually matched to form a spliced invisible light curtain for improving the light uniformity; and
the second light-emitting module comprises a second light-emitting structure arranged on the movable bearing module, wherein the second light-emitting structure generates a visible light curtain which is parallel to and overlapped with the spliced invisible light curtain;
the first light-emitting module and the second light-emitting module simultaneously move through the movable bearing module to synchronously adjust the parallelism of the visible light curtain and the spliced invisible light curtain relative to the projection area of the projection screen, wherein the second light-emitting structure comprises a single red light-emitting component and a second cylindrical mirror arranged in front of the single red light-emitting component, and a red light beam generated by the single red light-emitting component passes through the second cylindrical mirror to form the visible light curtain;
wherein the visible light curtain is close to and covers the projection area of the projection curtain so as to judge the flatness of the projection area of the projection curtain,
the movable bearing module comprises a movable bearing seat for bearing the first light-emitting module and the second light-emitting module and an adjusting mechanism arranged on the movable bearing seat, wherein the adjusting mechanism comprises a pin-joint type fulcrum structure, a levelness adjusting structure for adjusting the levelness of the movable bearing seat relative to the projection area and an inclination adjusting structure for adjusting the inclination of the movable bearing seat relative to the projection area.
10. The projection system of claim 9, wherein the projection device and the light curtain generating device are separate from each other, the projection device includes a projection lens and a wireless signal transmitter, and the light curtain generating device includes a wireless signal receiver corresponding to the wireless signal transmitter.
11. The projection system of claim 10, wherein the projection device provides a lens turn-on and turn-off timing signal of the projection lens, the lens turn-on and turn-off timing signal of the projection lens is wirelessly transmitted to the wireless signal receiver through the wireless signal transmitter, and the light curtain generating device turns on or off the first light emitting module according to the lens turn-on and turn-off timing signal received by the wireless signal receiver.
12. The projection system of claim 9, wherein the pivot structure has a fixing portion fixed on an outer housing and a pivot portion connected to the fixing portion and movably received in a pivot groove of the movable carrying seat, the horizontal adjustment structure comprises a first adjusting bolt passing through the outer housing and the movable carrying seat and a first elastic member sleeved on the first adjusting bolt and located between the outer housing and the movable carrying seat, and the tilt adjustment structure comprises a second adjusting bolt passing through the outer housing and the movable carrying seat and a second elastic member sleeved on the second adjusting bolt and located between the outer housing and the movable carrying seat.
13. The projection system of claim 9, wherein the visible light sheet is spaced a predetermined distance from the projected area of the projection sheet, and the visible light sheet is detected above the projected area of the projection sheet to determine whether the projected area of the projection sheet is warped to contact the visible light sheet.
14. The projection system of claim 9, wherein the visible light sheet is spaced a predetermined distance from the projected area of the projection sheet, and the visible light sheet is detected above the projected area of the projection sheet to determine whether there is a protrusion on the projected area of the projection sheet that contacts the visible light sheet.
15. The projection system of claim 9, wherein the first light module includes a middle light structure for producing a middle invisible light curtain, a left light structure for producing a left oblique invisible light curtain, and a right light structure for producing a right oblique invisible light curtain.
16. The projection system of claim 15, wherein the left light-emitting structure is tilted relative to the middle light-emitting structure and located to the left of the middle light-emitting structure, the right light-emitting structure is tilted relative to the middle light-emitting structure and located to the right of the middle light-emitting structure, the middle non-visible light sheet corresponds to a middle portion of the projection area, the left tilted non-visible light sheet partially overlaps the middle non-visible light sheet and corresponds to a left portion of the projection area, and the right tilted non-visible light sheet partially overlaps the middle non-visible light sheet and corresponds to a right portion of the projection area.
17. The projection system of claim 9, wherein each of the first light emitting structures comprises an infrared light emitting element and a first cylindrical mirror disposed in front of the infrared light emitting element.
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| CN201610389930.XA CN107463059B (en) | 2016-06-02 | 2016-06-02 | Projection system and light curtain generating device thereof |
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| CN201610389930.XA CN107463059B (en) | 2016-06-02 | 2016-06-02 | Projection system and light curtain generating device thereof |
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| CN111526346A (en) * | 2019-02-03 | 2020-08-11 | 中强光电股份有限公司 | Projection system and projection method |
| CN113997202A (en) * | 2021-11-12 | 2022-02-01 | 西安应用光学研究所 | High-efficiency trimming method for accurately quantifying high flatness of large-size grinding disc |
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| CN107463059A (en) | 2017-12-12 |
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