CN113608399B - Conference room is with multimedia projector of convenient demonstration - Google Patents

Abstract

The invention relates to the field of multimedia projection devices, in particular to a multimedia projector for convenient presentation in conference rooms. Inside the shell, and arranged symmetrically, a high-pressure mercury lamp is arranged between the two sets of the actuators, and a plane mirror is also arranged between the two groups of the actuators. The inside of the casing is provided with a DMD chip, the used DMD chip is vertically arranged with the plane mirror, and the center of the plane mirror and the DMD chip are located on the same vertical line. Different conferences have different needs for projectors.

Description

A multimedia projector for convenient presentation in conference room

technical field

The invention relates to the field of multimedia projection devices, in particular to a multimedia projector for convenient presentation in conference rooms.

Background technique

At present, with the continuous development of social economy and the advancement of multimedia technology, multimedia is the combination of computer and video technology, in fact, it is two media; sound and image, or use the current term: sound and television. Multimedia technology is the fastest and most active technology in the field of information technology today. Through the analysis of the application status and development trend of multimedia technology, this paper makes us look forward to the fact that with the increasingly popular high-speed information network, it is being widely used in Consulting services, books, education, communications, military, finance, medical and many other industries. Multimedia technology has further promoted the development of science and technology in our country, and multimedia equipment has been used more and more in modern conference rooms;

A projector, also known as a projector, is a device that can project an image or video onto a screen. It can be connected to a computer, game console, DV, etc. through different interfaces to play the corresponding video signal. For multimedia presentations, when conducting meetings, different projectors are often used according to the number of participants, but traditional projectors cannot meet different meeting needs with a single function. A multimedia projector is necessary.

SUMMARY OF THE INVENTION

Therefore, the present invention provides a multimedia projector for convenient presentation in a conference room, which can solve the problem that different conferences have different demands on the projector by autonomously changing the size of the projection range.

In order to achieve the above purpose, the present invention provides the following technical solutions: a multimedia projector for convenient presentation in a conference room, comprising an execution device and a casing, the execution devices are provided with two groups, and the two groups of the execution devices are located inside the casing , and arranged symmetrically, a high-pressure mercury lamp is arranged between the two sets of the execution devices, and a plane mirror is also arranged between the two sets of the execution devices, and the plane mirror and the high-pressure mercury lamp are arranged at 45 degrees, and the shell A DMD chip is arranged inside the body, and the used DMD chip is vertically arranged with the plane mirror, and the center of the plane mirror and the DMD chip are located on the same vertical line.

Preferably, the execution device includes a projection assembly, the projection assembly includes two groups of first fly-eye lenses, the front ends of the two groups of the first fly-eye lenses are provided with three metal frame mirrors, and the front ends of the three metal frame mirrors are provided with astigmatism mirrors, The astigmatic mirror is provided with a first dichroic mirror in the horizontal direction, the first dichroic mirror and the astigmatic mirror are arranged at an angle of 45 degrees, and the first dichroic mirror is arranged parallel to the horizontal direction with a second two dichroic mirror. Chromatic mirror, the second dichroic mirror is provided with a first condensing mirror at an angle of 45 degrees in the horizontal direction, the first condensing mirror is provided with a first reflecting mirror in the horizontal direction, the first reflecting mirror and the second dichroic mirror The mirrors are parallel, and the first reflecting mirror is provided with a second condensing mirror at an angle of 45 degrees in the vertical direction. The second condensing mirror is provided with a second reflecting mirror in the vertical direction. set up.

Preferably, the first dichroic mirror is provided with a third reflection mirror in the vertical direction, the third reflection mirror is arranged in parallel with the first dichroic mirror, and the execution device further includes a projection assembly and a mirror body assembly .

Preferably, the projection assembly includes an upper connecting plate, a center of the upper connecting plate is provided with an insertion hole, a light-combining prism is fixedly installed on the rear end wall of the insertion hole, and a side wall of the light-combining prism is connected to the insertion hole. Connected, the other three side walls of the light combining prism are all clamped with liquid crystal screens, the front ends of the three liquid crystal screens are all provided with polarizers, and the front ends of the polarizers are provided with convex mirrors. The second mirror, the second dichroic mirror, and the third mirror form an included angle of 45 degrees.

Preferably, the lens body assembly includes a lower connecting plate, a lower lens barrel is fixedly installed in the middle of the lower connecting plate, the lower lens barrel is matched with the socket, and the bottom of the lower lens barrel is provided with a second fly-eye lens, so The second fly-eye lens is aligned with the middle of the light combining prism, the front end of the lower lens barrel is threadedly connected with the upper lens barrel, and the upper lens barrel is provided with a focusing ring.

Preferably, a first objective lens is clamped inside the lower lens barrel, a second objective lens is clamped inside the upper lens barrel, and a liquid lens is also arranged inside the upper lens barrel, and the liquid lens is located between the first objective lens and the second objective lens. Between the objective lenses, the front end of the upper lens barrel is clamped with a mirror cover.

Preferably, the execution device further includes a laser transmitter, and the laser transmitter is located at the front end of the housing.

Preferably, the execution device further includes a light-filling mechanism, the light-filling mechanism is located on the lower surface of the casing, the light-filling mechanism includes a second light pass, and the lower end of the second light pass is communicated with the light combining prism, the The upper end of the second light passage is provided with a fourth reflection mirror, the fourth reflection mirror and the second light passage are at a 45-degree angle, the upper end of the second light passage is provided with a first light passage, and one end of the first light passage is connected to the The fourth reflector is connected, the rear end of the first light passage is provided with three groups of single-color LED lights, the three groups of the single-color LED lights are vertically arranged, and the light-emitting ends of the three groups of the single-color LED lights are connected to the first light source. Connected.

Preferably, a power control element is arranged inside the casing, a heat dissipation element is also arranged inside the casing, an HDMI interface and a VA/VG interface are arranged on the rear side wall of the casing, and the rear side wall of the casing is also provided with an HDMI interface and a VA/VG interface. A sound-color element is provided, the two side walls of the casing are provided with heat dissipation holes, and the upper surface of the casing is provided with a first regulation area and a Bluetooth regulation area.

Preferably, the power supply control element is electrically connected to the heat dissipation element, the sound-color element, the HDMI interface and the VA/VG interface, and the power supply control element is electrically connected to the first regulation area and the Bluetooth regulation area, so Electrical connection is adopted between the power control element and the single-color LED lamp and the high-pressure mercury lamp.

The beneficial effects of the present invention are:

1. When a small number of people is in a meeting, the DMD chip is activated at this time to absorb the white light generated by the high-pressure mercury lamp. At this time, the white light generated by the high-pressure mercury lamp will pass through the first fly-eye lens to make the light irradiate in parallel. Under the action of the chromatic mirror and the second dichroic mirror, the white light is decomposed into three primary colors of red, blue and green. The magnifying effect of the mirror body assembly is emitted, and the laser transmitter can be used for automatic focusing, so as to facilitate the display of conference content;

2. When conducting a meeting with a medium number of people, energize the liquid lens, so that the liquid inside the liquid lens forms a convex mirror, thereby increasing the projection distance and facilitating the conference display;

3. When a large number of people are in a meeting, start the DMD chip at this time to make it completely reflect the white light generated by the high-pressure mercury lamp. At this time, the two projection components will work at the same time, and the liquid lens will be energized at the same time, so that the liquid inside the liquid lens will be energized. A large-angle convex mirror is formed, which greatly increases the projection range, and can form a giant screen or a split screen, thereby improving the efficiency of the meeting;

4. When conducting a meeting with a medium or large number of people, due to the long projection distance, the problem of low projection brightness and unsaturated hue may occur during the display. At this time, by energizing the monochrome LED light, it can be The generated three primary color lights enter the light combining prism through the action of the first light pass, the fourth reflection mirror and the second light pass, so that the brightness and color of the projection are saturated.

Description of drawings

Fig. 1 is the structural representation of the supplementary light mechanism provided by the present invention;

Fig. 2 is the sectional view of this equipment provided by the present invention;

Fig. 3 is the top view provided by the present invention;

4 is a schematic structural diagram of a projection assembly provided by the present invention;

5 is a schematic structural diagram of an execution device provided by the present invention;

6 is a schematic cross-sectional structural diagram of a mirror body assembly provided by the present invention;

Fig. 7 is the enlarged view of A district provided by the present invention;

FIG. 8 is a schematic structural diagram of a second fly-eye lens provided by the present invention.

In the figure: the actuator 100, the projection assembly 110, the first fly-eye lens 111, the three metal frame mirror 112, the astigmatic mirror 113, the first dichroic mirror 114, the second dichroic mirror 115, the first condenser mirror 116, the first Reflector 117, second condenser lens 118, second reflector 119, third reflector 120, projection assembly 130, upper connecting plate 131, jack 132, light combining prism 133, liquid crystal screen 134, convex mirror 135, polarizer 136 , mirror body assembly 140, lower connecting plate 141, lower lens barrel 142, focusing ring 143, upper lens barrel 144, first objective lens 145, liquid lens 146, second fly-eye lens 147, second objective lens 148, mirror cover 149, high voltage Mercury lamp 150, plane mirror 160, DMD chip 170, laser transmitter 180, supplementary light mechanism 190, fourth reflector 191, first light flux 192, second light flux 193, monochrome LED lamp 194, housing 200, power supply The control element 210 , the HDMI interface 211 , the VA/VG interface 212 , the heat dissipation element 220 , the heat dissipation hole 221 , the sound and color element 230 , the first control area 240 , and the Bluetooth control area 250 .

Detailed ways

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, but not to limit the present invention.

Referring to Figures 1-8, the present invention provides a multimedia projector for convenient presentation in a conference room, including an execution device 100 and a housing 200, the execution device 100 is provided with two groups, and the two groups of execution devices 100 can form a giant screen , the two sets of actuators 100 are located inside the casing 200 and are symmetrically arranged, a high-pressure mercury lamp 150 is arranged between the two sets of actuators 100, and a plane mirror 160 is also arranged between the two groups of actuators 100. The plane mirror 160 and the high-pressure mercury lamp 150 are arranged at 45 degrees, the casing 200 is provided with a DMD chip 170, the used DMD chip 170 is vertically arranged with the plane mirror 160, and the center of the plane mirror 160 and the DMD chip 170 are located on the same vertical line. Specifically, the DMD chip 170 There are 800,000 to 1,000,000 small mirrors densely arranged on the top, and each small mirror can be flipped 10 degrees in the positive and negative directions independently. When the positive and negative flips are performed, the small mirrors on the DMD chip 170 can reflect light, The white light generated by the high pressure mercury lamp 150 is absorbed or reflected.

Further, the execution device 100 includes a projection assembly 110, and the projection assembly 110 includes two sets of first fly-eye lenses 111, and the first fly-eye lenses 111 can parallel the irradiated light, thereby changing the white light generated by the high-pressure mercury lamp 150 into parallel light In order to facilitate the subsequent decomposition into three primary colors, the front ends of the two groups of first fly-eye lenses 111 are provided with three metal frame mirrors 112, the front ends of the three metal frame mirrors 112 are provided with astigmatic mirrors 113, and the astigmatic mirror 113 is provided with a first dichroic mirror 114 in the horizontal direction. , the first dichroic mirror 114 can reflect red light in white light, and light of other colors can penetrate, the first dichroic mirror 114 and the astigmatic mirror 113 are arranged at an angle of 45 degrees, and the first dichroic mirror 114 is horizontal A second dichroic mirror 115 is arranged in parallel in the direction, and the second dichroic mirror 115 can reflect green light and transmit light of other colors. 116, the first condensing mirror 116 is provided with a first reflecting mirror 117 in the horizontal direction, the first reflecting mirror 117 is parallel to the second dichroic mirror 115, and a second condensing mirror 118 is disposed in the vertical direction of the first reflecting mirror 117 at an included angle of 45 degrees , the second condensing mirror 118 is provided with a second reflecting mirror 119 in the vertical direction, and the second reflecting mirror 119 is vertically arranged with the first reflecting mirror 117. Specifically, the white light generated by the high-pressure mercury lamp 150 passes through the first dichroic mirror 114. , the red light in the white light is reflected by the third reflecting mirror 120 and enters the first convex mirror 135. At this time, when the transmitted light passes through the second dichroic mirror 115, the green light will be reflected by the second dichroic mirror. The light of other colors reflected by 115 on the second convex mirror 135 will pass through the second dichroic mirror 115, and enter the third convex mirror 135 through the action of the first reflecting mirror 117 and the second reflecting mirror 119, The first condensing mirror 116 and the second condensing mirror 118 can collect the light after passing through the second dichroic mirror 115, thereby facilitating projection.

Further, the first dichroic mirror 114 is provided with a third reflecting mirror 120 in the vertical direction, the third reflecting mirror 120 is arranged in parallel with the first dichroic mirror 114, and the execution device 100 further includes a projection assembly 130 and a mirror body assembly 140. Specifically, the third reflecting mirror 120 is arranged in parallel with the first dichroic mirror 114, which can better screen the light, and effectively avoid the waste of light energy.

Further, the projection assembly 130 includes an upper connecting plate 131, an insertion hole 132 is provided at the center 131 of the upper connecting plate, a light-combining prism 133 is fixedly installed on the rear wall of the insertion hole 132, and a side wall of the light-combining prism 133 is connected to the insertion hole 132. Connected, the other three side walls of the light combining prism 133 are all clamped with liquid crystal screens 134, the front ends of the three liquid crystal screens 134 are all provided with polarizers 136, the front ends of the polarizers 136 are provided with convex mirrors 135, and the three groups of convex mirrors 135 are respectively connected with the second The reflecting mirror 119, the second dichroic mirror 115, and the third reflecting mirror 120 form an included angle of 45 degrees. Specifically, the light-combining prism 133 can synthesize the formed three primary colors of light to form a projection, wherein the polarizer 136 is provided with three pieces, Its colors are red, green, and blue, respectively, and the polarizer 136 can filter light of other colors.

Further, the mirror body assembly 140 includes a lower connecting plate 141, a lower lens barrel 142 is fixedly installed in the middle of the lower connecting plate 141, the lower lens barrel 142 is matched with the socket 132, and the bottom of the lower lens barrel 142 is provided with a second fly-eye lens 147. The second fly-eye lens 147 is aligned with the middle of the light combining prism 133 , the front end of the lower lens barrel 142 is threadedly connected with the upper lens barrel 144 , and the upper lens barrel 144 is provided with a focusing ring 143 . The projections are placed in parallel, which facilitates the formation of images on the screen for viewing by participants.

Further, a first objective lens 145 is clamped inside the lower lens barrel 142, a second objective lens 148 is clamped inside the upper lens barrel 144, and a liquid lens 146 is also provided inside the upper lens barrel 144, and the liquid lens 146 is located between the first objective lens 145 and the second objective lens 146. Between the objective lenses 148, the front end of the upper lens barrel 144 is clamped with a mirror cover 149. Specifically, when a current is applied to the electrodes of the liquid lens 146, the liquid in the liquid lens 146 will be deformed, thereby forming a convex lens and a concave lens. The magnitude and state of the incoming current can change the curvature of the liquid in the liquid lens 146 , thereby facilitating the change of the focal length of the projector and adapting to various occasions.

Further, the execution device 100 further includes a laser transmitter 180. The laser transmitter 180 is located at the front end of the housing 200. By calculating the time difference between the laser transmitter 180 emits and receives the laser, the distance between the projector and the screen can be obtained, thereby It is convenient to adjust the focal length of the projector.

Further, the execution device 100 further includes a light-filling mechanism 190, which is located on the lower surface of the housing 200, and the light-filling mechanism 190 includes a second light passage 193, and the lower end of the second light passage 193 communicates with the light combining prism 133, and the second light passage 193 communicates with the light combining prism 133. The upper end of the light passage 193 is provided with a fourth reflection mirror 191, the fourth reflection mirror 191 and the second light passage 193 are at an angle of 45 degrees, the upper end of the second light passage 193 is provided with a first light passage 192, and one end of the first light passage 192 is connected to the second light passage 193. The four mirrors 191 are connected to each other, the rear end of the first light channel 192 is provided with three sets of single-color LED lights 194 , and the three sets of single-color LED lights 194 are arranged vertically. Specifically, through the functions of the first light pass 192, the second light pass 193 and the fourth reflector 191, the light generated by the three monochromatic LED194 lamps can be introduced into the light combining prism, thereby improving the projection efficiency. Brightness and color saturation, the first light pass 192 and the second light pass 193 are both composed of four opaque reflectors, which can transport the white light generated by the three sets of monochromatic LED lamps 194 into the light combining prism 133 , thereby increasing the brightness of the resulting projection as well as its color saturation.

Further, a power control element 210 is arranged inside the casing 200, a heat dissipation element 220 is also arranged inside the casing 200, an HDMI interface 211 and a VA/VG interface 212 are arranged on the rear side wall of the casing 200, and the rear side wall of the casing 200 is also provided with an HDMI interface 211 and a VA/VG interface. There are sound-color elements 230, heat dissipation holes 221 are provided on both side walls of the casing 200, and a first regulation area 240 and a Bluetooth regulation area 250 are arranged on the upper surface of the casing 200. The mobile phone is connected via Bluetooth to facilitate the control of the device.

Further, electrical connection is adopted between the power control element 210 and the heat dissipation element 220 , the sound and color element 230 , the HDMI interface 211 and the VA/VG interface 212 . Electrical connection, the power control element 210 is electrically connected to the single-color LED lamp 194 and the high-pressure mercury lamp 150. Specifically, the power control element 210 can provide power for the heat dissipation element 220 and the sound-color element 230, thereby facilitating the operation of the device. Dissipate heat and sound, and set up multiple sets of HDMI interface 211 and VA/VG interface 212 at the same time, so that the device can be connected to various external devices, so that the practicability of the projector is greatly improved, and the power control element 210 can be a monochrome LED. The lamp 194 and the high-pressure mercury lamp 150 provide electrical energy, and the power control element 210 can also control the single-color LED lamp 194 and the high-pressure mercury lamp 150 to prevent the device from making mistakes during operation;

The use process of the present invention is as follows: when conducting a small number of meetings, the DMD chip 170 is activated at this time to absorb the white light generated by the high-pressure mercury lamp 150, and the white light generated by the high-pressure mercury lamp 150 is reflected and passed by the plane mirror 160. The first fly-eye lens 111, the first fly-eye lens 111 can make the white light generated by the high pressure mercury lamp 150 irradiate in parallel, and under the action of the first dichroic mirror 114, the red light in the white light is reflected to the third reflecting mirror 120, Under the action of the third reflecting mirror 120, through the condensing action of the convex mirror 135 and the screening action of the red polarizer 136, it enters the light combining prism 133 through the liquid crystal screen 134, and the light of the other colors is in the second dichroic Under the action of the dichroic mirror 115, the green light is filtered by the convex mirror 135 and the green polarizer 136 under the action of the second dichroic mirror 115, and then enters the light combining prism 133 through the liquid crystal screen 134, and the remaining light Through the condensing action of the first condensing mirror 116 and the second condensing mirror 118 and the reflection action of the first reflecting mirror 117 and the second reflecting mirror 119 , the light condensing action of the convex mirror 135 and the screening action of the blue polarizer 136 , through the liquid crystal screen 134 enters into the light-combining prism 133, at this time the power control element 210 can control the three groups of liquid crystal screens 134, so that the three primary colors of light can be combined in different ways to form projections, which are emitted through the magnification of the mirror body assembly 140, and at the same time The laser transmitter 180 can be used for fast focusing, so as to facilitate the presentation of the conference content. When a medium or high number of people is in a conference, the DMD chip 170 is activated at this time to completely reflect the white light generated by the high-pressure mercury lamp 150. At this time, two The projection assembly 110 will work at the same time, and the liquid lens 146 will be energized at the same time, so that the liquid inside the liquid lens 146 forms a large-angle convex mirror, thereby greatly increasing the projection range, and at the same time, it can form a giant screen or a split screen, thereby improving the conference efficiency. At the same time, due to the long projection distance, the problem of low projection brightness and unsaturated hue may occur during the display. At this time, by energizing the single-color LED lamp 194, the three primary colors of light generated can pass through the first light. The function of the light pass 192, the fourth reflection mirror 191, and the second light pass 194 enters the light combining prism, so that the brightness and color of the projection are saturated.

The above are only preferred embodiments of the present invention, and any person skilled in the art may modify the present invention by using the technical solutions described above or modify them into equivalent technical solutions. Therefore, any simple modifications or equivalent replacements made according to the technical solutions of the present invention fall within the protection scope of the present invention.

Claims (9)

1. A multimedia projector for convenient presentation in a conference room, comprising an execution device (100) and a housing (200), the execution device (100) is provided with two groups, and the two groups of the execution devices (100) are located in the case The inside of the body (200) is symmetrically arranged, and is characterized in that: a high pressure mercury lamp (150) is arranged between the two sets of the actuators (100), and a plane mirror is also arranged between the two sets of the actuators (100). (160), the plane mirror (160) and the high-pressure mercury lamp (150) are arranged at 45 degrees, a DMD chip (170) is arranged inside the casing (200), and the used DMD chip (170) and the plane mirror ( 160) vertical arrangement, the center of the plane mirror (160) and the DMD chip (170) are located on the same vertical line; The execution device (100) includes a projection assembly (110), the projection assembly (110) includes two groups of first fly-eye lenses (111), and the front ends of the two groups of the first fly-eye lenses (111) are provided with three metal frame mirrors ( 112), the front end of the three metal frame mirror (112) is provided with an astigmatic mirror (113), and the astigmatic mirror (113) is provided with a first dichroic mirror (114) in the horizontal direction, and the first dichroic mirror (114) (114) and the astigmatic mirror (113) are arranged at an angle of 45 degrees, the first dichroic mirror (114) is provided with a second dichroic mirror (115) parallel to the horizontal direction, and the second dichroic mirror (115) is arranged in parallel with the horizontal direction. The mirror (115) is provided with a first condensing mirror (116) at an angle of 45 degrees in the horizontal direction, the first condensing mirror (116) is provided with a first reflecting mirror (117) in the horizontal direction, the first reflecting mirror (117) and the The dichroic mirrors (115) are parallel, the first reflecting mirror (117) is provided with a second condensing mirror (118) at an angle of 45 degrees in the vertical direction, and the second condensing mirror (118) is provided with a second condensing mirror (118) in the vertical direction. Two reflecting mirrors (119), the second reflecting mirror (119) and the first reflecting mirror (117) are vertically arranged. 2. The multimedia projector for convenient presentation in a conference room according to claim 1, wherein the first dichroic mirror (114) is provided with a third reflector (120) in the vertical direction, The third reflector (120) is arranged in parallel with the first dichroic mirror (114), and the execution device (100) further includes a projection assembly (130) and a mirror body assembly (140). 3. The multimedia projector for convenient presentation in a conference room according to claim 2, wherein the projection assembly (130) comprises an upper connecting plate (131), and the center of the upper connecting plate (131) An insertion hole (132) is provided, a light-combining prism (133) is fixedly installed on the rear wall of the insertion hole (132), and a side wall of the light-combining prism (133) is communicated with the insertion hole (132). Liquid crystal screens (134) are clamped on the other three side walls of the light combining prism (133), and polarizers (136) are provided at the front ends of the three liquid crystal screens (134), and the front ends of the polarizers (136) are provided with convex surfaces. A mirror (135), the three groups of convex mirrors (135) respectively form an included angle of 45 degrees with the second reflecting mirror (119), the second dichroic mirror (115) and the third reflecting mirror (120). 4. The multimedia projector for convenient presentation in a conference room according to claim 3, wherein the mirror body assembly (140) comprises a lower connecting plate (141), and a middle part of the lower connecting plate (141) A lower lens barrel (142) is fixedly installed, the lower lens barrel (142) is matched with the socket (132), and the bottom of the lower lens barrel (142) is provided with a second fly-eye lens (147), the second fly-eye lens (147). The lens (147) is aligned with the middle of the light combining prism (133), the front end of the lower lens barrel (142) is screwed with an upper lens barrel (144), and the upper lens barrel (144) is provided with a focusing ring (143). 5. The multimedia projector for convenient presentation in a conference room according to claim 4, characterized in that: the lower lens barrel (142) is internally clamped with a first objective lens (145), and the upper lens barrel (144) ) is internally clamped with a second objective lens (148), the upper lens barrel (144) is also provided with a liquid lens (146), and the liquid lens (146) is located between the first objective lens (145) and the second objective lens (148) In between, a mirror cover (149) is clamped at the front end of the upper lens barrel (144). 6 . The multimedia projector for convenient presentation in a conference room according to claim 1 , wherein the execution device ( 100 ) further comprises a laser transmitter ( 180 ), and the laser transmitter ( 180 ) is located in the The front end of the casing (200). 7. The multimedia projector for convenient presentation in a conference room according to claim 3, wherein the execution device (100) further comprises a light-filling mechanism (190), and the light-filling mechanism (190) is located in the On the lower surface of the housing (200), the supplementary light mechanism (190) includes a second light passage (193), the lower end of the second light passage (193) communicates with the light combining prism (133), and the second light passage (193) (193) A fourth reflection mirror (191) is arranged on the upper end, the fourth reflection mirror (191) and the second light passage (193) are at a 45-degree angle, and the upper end of the second light passage (193) is provided with a first A luminous flux (192), one end of the first luminous flux (192) is communicated with the fourth reflector (191), and the rear end of the first luminous flux (192) is provided with three sets of single-color LED lights (194), three sets of The monochromatic LED lamps (194) are vertically arranged, and the light-emitting ends of the three groups of the monochromatic LED lamps (194) are communicated with the first light passages (192). 8 . The multimedia projector for convenient presentation in a conference room according to claim 7 , wherein a power control element ( 210 ) is arranged inside the casing ( 200 ), and a power control element ( 210 ) is arranged inside the casing ( 200 ). 9 . A heat dissipation element (220) is also provided, the rear side wall of the casing (200) is provided with an HDMI interface (211) and a VA/VG interface (212), and the rear side wall of the casing (200) is further provided with sound and color elements (230), the two side walls of the casing (200) are provided with heat dissipation holes (221), and the upper surface of the casing (200) is provided with a first regulation area (240) and a Bluetooth regulation area (250). 9. The multimedia projector for convenient presentation in a conference room according to claim 8, characterized in that: the power control element (210), the heat dissipation element (220), the sound-color element (230), the HDMI interface (211) ) and the VA/VG interface (212) are all electrically connected, the power control element (210) is electrically connected with the first regulation area (240) and the Bluetooth regulation area (250), the power control element (210) is electrically connected to the single-color LED lamp (194) and the high-pressure mercury lamp (150).

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