Lyrics projection device

Abstract

The utility model discloses a kind of lyric projection devices, comprising: light shadow module, at least including first light source, projection screen located on first light source and lens group located above projection screen, the light emitted by first light source passes through projection screen and lens group and forms lyric or pattern projection;Ambience module includes second light source, imaging element located above second light source, imaging element is set as optical element or projection sheet, optical element or projection sheet includes multiple imaging area with different light transmittance, the light emitted by second light source passes through multiple different imaging area and forms multiple different projection area, wherein the brightness of one projection area and another projection area is different and / or color is different, and at least part of light effect of multiple different brightness and / or different color projection area is from far to near and over lyric or pattern.Make that projection light effect and lyric both completely fuse, enhance atmosphere and scene immersion, and user experience effect is good.

Description

Technical Field

[0001] This utility model relates to the technical field of projection devices, and in particular to a projection device for projecting lyrics. Background Technology

[0002] An existing lyrics display device includes a housing and a display screen, a motherboard, and a speaker mounted on the housing. The housing includes a receiving cavity and a first housing and a second housing constituting the receiving cavity. The first housing has multiple speaker holes corresponding to the speaker, and these speaker holes communicate with the receiving cavity. The display screen is mounted on a display window of the second housing, and the display window communicates with the receiving cavity. When the device is powered on, the lyrics are displayed on the display screen, allowing the user to sing karaoke.

[0003] Because the display screen in the above structure is very small, users need to stare at the screen for a long time, which can easily cause eye fatigue. If the display screen is large, it will result in high costs.

[0004] Therefore, a new lyrics projection device needs to be designed to overcome the above problems. Summary of the Invention

[0005] In view of the problems faced by the prior art, this utility model provides a lyrics projection device that combines lyrics projection with atmosphere.

[0006] To achieve the above objectives, the present invention employs the following technical means.

[0007] A lyrics projection device includes: a light and shadow module, comprising at least a first light source, a projection screen located on the first light source, and a lens group located above the projection screen, wherein light emitted from the first light source passes through the projection screen and the lens group to form lyrics or pattern projection; and an atmosphere module, comprising a second light source and an imaging element located above the second light source, wherein the imaging element is configured as an optical element or a projector, and the optical element or the projector includes multiple imaging areas with different transmittances, wherein light emitted from the second light source passes through the multiple different imaging areas to form multiple different projection areas, wherein one projection area has different brightness and / or different color than another projection area, and at least part of the light effect of the multiple projection areas with different brightness and / or different color passes over the lyrics or pattern from far to near.

[0008] Furthermore, the atmosphere module projects upwards, and the projection light effect of the atmosphere module is projected onto the ceiling and walls. The lyrics or pattern projection formed by the light and shadow module coincides with the projection light effect formed by the atmosphere module on the wall. The atmosphere module projects along the front-to-back direction, forming a light effect at least projected onto the wall. The lyrics or pattern projection formed by the light and shadow module at least partially coincides with the light effect, and their central axes intersect or are parallel. The atmosphere module projects downwards, and the lyrics or pattern projection formed by the light and shadow module at least partially coincides with the light effect, and their central axes intersect or are parallel.

[0009] Furthermore, the central axis of the light and shadow module is defined as P1, the central axis of the atmosphere module is defined as P2, and the minimum included angle β between P1 and P2 is between 0° and 180°.

[0010] Furthermore, the ambient lighting effect includes multiple slender, deformed light and shadow lines, some of which move and intersect with the lyrics projection in the left-right direction and / or move and intersect with the lyrics projection in the up-down direction.

[0011] Furthermore, the projection screen includes an axis C1, and the lyrics projection device further includes a heat sink arranged around the axis C1 and lenses located on both sides of the upper side of the heat sink. At least one sidewall or bottom surface of the heat sink is in contact with the projection screen. The heat sink includes heat sink fins arranged around the projection screen, and the heat sink is connected upward to the lenses.

[0012] Furthermore, the projected lyrics are presented in the projected light effects in a way that fades in, changes, scrolls, or has particle effects, with the light effects overlapping one of the lyrics constantly changing.

[0013] Furthermore, the projection screen includes a front side and a back side arranged opposite to each other. The projection screen includes an access terminal and a circuit board electrically connected to the access terminal. The circuit board is soldered to the front side. The front side of the projection screen faces the first light source, and the back side of the projection screen faces the lens group.

[0014] A lyrics projection device includes: a light and shadow module, comprising at least a first light source, a projection screen located on the first light source, and a lens group located above the projection screen, wherein light emitted from the first light source passes through the projection screen and the lens group to form a lyrics projection; and an atmosphere module, comprising a second light source, an optical element located above the second light source, and a lampshade, wherein the optical element includes concave and convex textures, wherein at least some of the textures have different sizes or angles, wherein light emitted from the second light source passes through the optical element and the lampshade to form an outward projection of an ambient light effect, wherein at least some of the ambient light effect passes between two adjacent lyrics or between two adjacent lines of lyrics.

[0015] Furthermore, the cross-section of the light and shadow module along the front-to-back direction is defined as the first plane, and the cross-section of the atmosphere module along the up-down direction is defined as the second plane, and the first plane intersects with the second plane.

[0016] Furthermore, the light and shadow module includes a base, a fixed seat housed in a cavity of the base, and a first light source, a projection screen, and a lens assembly mounted on the fixed seat. The base includes a first heat dissipation hole communicating with the cavity. The projection screen is mounted in a cavity of the fixed seat. The fixed seat includes a second heat dissipation hole communicating with the cavity. The second heat dissipation hole surrounds the projection screen. The first heat dissipation hole, the cavity, the second heat dissipation hole, and the cavity together form air convection to carry away the heat from the projection screen.

[0017] Furthermore, the light and shadow module includes at least the first light source, a light distribution Fresnel lens or convex lens, the projection screen, and the lens group arranged sequentially from bottom to top, wherein the axis of the projection screen coincides with or is parallel to the axis of the lens group.

[0018] Compared with the prior art, the lyrics projection device of this utility model has the following beneficial effects.

[0019] The lighting module includes a first light source, a projection screen on the light source, and a lens assembly above the projection screen. Light emitted from the first light source passes through the projection screen and the lens assembly to project lyrics. The atmosphere module includes a second light source and an imaging element above the second light source. The imaging element is configured as an optical element or a projector sheet, and the optical element or the projector sheet includes multiple imaging zones with different transmittances. Light emitted from the second light source passes through these multiple imaging zones to form multiple different projection zones. One projection zone has a different brightness and / or color than another. At least part of the light and shadow from these multiple projection zones with different brightness and / or different colors passes over the lyrics from a distance. This allows the projected light effect and the lyrics to be completely integrated, enhancing the atmosphere and immersion in the scene, resulting in a better user experience. Attached Figure Description

[0020] Figure 1 This is a perspective view of the lyrics projection device of this utility model.

[0021] Figure 2 for Figure 1 The light and shadow module in the image moves a certain angle to create a 3D image.

[0022] Figure 3 for Figure 2 The main view.

[0023] Figure 4 for Figure 1 The right view.

[0024] Figure 5 for Figure 4 A sectional view taken along line AA.

[0025] Figure 6 for Figure 1 Top view.

[0026] Figure 7 for Figure 1 A three-dimensional view of the central base 1 with its back cover removed and rotated at a certain angle.

[0027] Figure 8 for Figure 1 3D exploded view of the light and shadow module.

[0028] Figure 9 for Figure 8 An exploded 3D view after removing the outer casing and bearing cover.

[0029] Explanation of reference numerals in the accompanying drawings for specific embodiments: 133 horn hole Installation slot 134 Containment slot 135 Position 136 Light and Shadow Module 2 Base 21 Cavity 211 Casing 212 Shaft cover 213 Pivot shaft 214 First heat dissipation hole 215 First Light Source 22 Fixed base 23 First fixing frame 231 Positioning hole 23112311 Thermal pores 23122312 First fixed post 2313 Second fixed post 2314 Second fixing bracket 232 Fixing part 2321 Through hole 2322 Second heat dissipation hole 2323 Cavity 233 Light distribution component 24 Concentrator 241 Optical lens 242 Heat sink 25 Mounting hole 251 First Installation Section 252 Second Installation Section 253 Heatsink 254 26-inch projection screen Pressure plate 27 Imaging Fresnel lens 28 Lens Group 29 Imaging lens 291 Atmosphere Module 3 Lampshade 35 Axis P1 Pivot axis S1 Central axis C1 Detailed Implementation

[0030] To facilitate a better understanding of the purpose, structure, features, and effects of this utility model, the present utility model will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0031] like Figures 1 to 9 As shown, the lyric projection device 100 of this utility model includes a base 1, a light and shadow module 2 mounted on the base 1, and an atmosphere module 3. The light and shadow module 2 is pivotally connected to the base 1, and the projection angles of the light and shadow module 2 and the atmosphere module 3 are different. The light and shadow module 2 is defined to face forward, and the direction in which the light and shadow module 2 and the atmosphere module 3 are arranged side by side is defined as left and right.

[0032] like Figure 1 and Figure 7 As shown, the base 1 includes a receiving cavity 11 and a first seat and a second seat constituting the receiving cavity 11. The second seat includes a projection hole 132 opening in the vertical direction and a horn hole 133 opening in the rearward direction. The axis of the projection hole 132 is perpendicular to the axis of the horn hole 133. The second seat also includes a mounting position 134 adjacent to the projection hole 132, receiving grooves 135 located on the left and right sides of the mounting position 134, and a locking position 136 protruding into the receiving groove 135. The mounting position 134 extends through the second seat in the front-back direction. The two receiving grooves 135 are connected to the mounting position 134. The base 1 includes a speaker installed corresponding to the horn hole 133. The speaker and the projection direction of the light and shadow module 2 are opposite or they face different sides.

[0033] like Figure 1 , Figure 2 and Figure 3 As shown, the central axis of the projection angle of the light and shadow module 2 is defined as P1, and the light and shadow module 2 projects towards the wall or the ground. The light and shadow module 2 is installed in the mounting position 134 along the front-to-back direction.

[0034] like Figure 5 , Figure 8 and Figure 9The plane containing the intermediate cross-section formed by the extension of the light and shadow module 2 in the front-to-back direction is the first plane. The light and shadow module 2 includes multiple lyric projection modes, including single-line lyric projection, multi-line lyric projection, or adding an album interface on top of the lyrics. The light and shadow module 2 includes at least a first light source 22, a projection screen 26 located on the light source, and an imaging lens located above the projection screen 26. Alternatively, the light and shadow module 2 further includes at least one light distribution lens 242 located between the first light source 22 and the projection screen 26, with the projection screen 26 located between the light distribution lens 242 and the imaging lens, and the imaging lens coinciding with the central axis of the projection screen 26. The light emitted by the first light source 22 passes through the projection screen 26 and the imaging lens to form lyrics or patterns projected toward a wall or ground. In this embodiment, the light and shadow module 2 includes a base 21, a first light source 22 mounted on the base 21, a fixing base 23, a light distribution assembly 24, a projection screen 26, a pressure plate 27, a heat sink 25, an imaging Fresnel lens 28, and a lens group 29. The light emitted by the first light source 22 passes sequentially through the light distribution assembly 24, the projection screen 26, the pressure plate 27, the heat sink 25, the imaging Fresnel lens 28, and the lens group 29 to form lyrics or patterns projected toward a wall or ground. The heat sink 25 is connected downwards to the light distribution assembly 24 and downwards to the imaging Fresnel lens 28, including direct and indirect connections between the heat sink 25 and the light distribution assembly 24, and direct and indirect connections between the heat sink 25 and the imaging Fresnel lens 28. The base 21 includes a cavity 211 and a housing 212 and a shaft cover 213 constituting the cavity 211. The cavity 211 extends forward through the housing 212. The housing 212 includes a plurality of through first heat dissipation holes 215, which are connected to the cavity 211. The shaft cover 213 includes a plate and a pivot shaft 214. The pivot shaft 214 includes a pivot axis S1 extending in the left-right direction. P1 intersects with S1, preferably perpendicular to each other. The light and shadow module 2 rotates upward or downward around the pivot axis S1. The left and right sides of the pivot shaft 214 are respectively installed in the receiving groove 135, and the locking position 136 prevents the pivot from disengaging from the receiving groove 135. The fixing base 23 includes a cavity 233 and a first fixing frame 231 and a second fixing frame 232 forming the cavity 233. The first fixing frame 231 and the second fixing frame 232 are fixed to each other. The first fixing frame 231 includes a positioning hole 2311, a heat-conducting hole 2312 communicating with the positioning hole 2311, a plurality of first fixing posts 2313 and a plurality of second fixing posts 2314 arranged around the positioning hole 2311.The heat-conducting hole 2312 is connected to the cavity 233, and a plurality of first fixing posts 2313 are arranged around the second fixing posts 2314. The shaft cover 213 is fixed to the first fixing posts 2313. The first light source 22 is fixed to the plurality of second fixing posts 2314, and the second light source is arranged facing the positioning hole 2311. The second fixing frame 232 includes a fixing part 2321 extending upward, a through hole 2322 penetrating the fixing part 2321, and a plurality of second heat dissipation holes 2323 arranged around the through hole 2322. The through hole 2322 and the second heat dissipation holes 2323 are all connected to the cavity 233. The first heat dissipation holes 215, the second heat dissipation holes 2323, the cavity 233 and the cavity 211 allow air convection to carry away the heat of the projection screen 26 and prevent the projection screen 26 from fading. The light distribution component 24 is located between the first light source 22 and the projection screen 26. The light distribution assembly 24 includes a condenser 241 mounted in the positioning hole 2311 and a light distribution lens 242 located above the condenser 241. The condenser 241 can be configured as a reflector, convex lens, etc., to meet the usage requirements. The light distribution lens 242 is a Fresnel lens or a convex lens. The heat sink 25 is connected to the Fresnel lens or convex lens, including direct connection and indirect connection. The heat sink 25 is located above the light distribution lens 242 and includes a vertically penetrating mounting hole 251, a first mounting portion 252, a second mounting portion 253, and a heat sink 254 arranged around the mounting hole 251. The first mounting portion 252 is located below the second mounting portion 253. The mounting hole 251 is vertically connected to the through hole 2322. The projection screen 26 includes an axis C1. The heat sink 25 is at least partially arranged around the axis C1, and at least partially contacts the projection screen 26, that is, the side wall, bottom wall, or top wall of the heat sink 25 contacts the projection screen 26. The side wall forms the wall of the mounting hole 251. The heat sink 25 dissipates heat from the projection screen 26 outwards. The projection screen 26 includes a front and a back side arranged opposite to each other. The projection screen 26 includes an access terminal and a circuit board electrically connected to the access terminal. The circuit board is soldered to the front side. The front side of the projection screen 26 faces the light source, and the back side of the projection screen 26 faces the lens group 29. In this example, the projection screen 26 is located between the light distribution lens 242 and the imaging Fresnel lens 28. The projection screen 26 is mounted on the first mounting part 252 and exposed upwards through the mounting hole 251. The contact surface between the first mounting part 252 and the projection screen 26 forms one side of the heat sink 25. The pressure plate 27 is received in the mounting hole 251 and presses down on the projection screen 26, and the imaging Fresnel lens 28 presses down on the pressure plate 27.The imaging Fresnel lens 28 is fixed to the second mounting portion 253. The imaging Fresnel lens 28 at least partially contacts the heat sink 254, or the heat sink 254 is arranged around the imaging Fresnel lens 28. In this embodiment, the heat sink 254 is partially recessed to form the second mounting portion 253, and at least part of the heat sink 254 is arranged around the axis of the imaging Fresnel lens 28. The lens group 29 coincides with the central axis of the Fresnel lens. The lens group 29 is mounted on the fixing portion 2321 and includes an imaging lens 291, which is located above the imaging Fresnel lens 28. In other embodiments, the light and shadow module 2 includes at least the first light source 22, a light distribution Fresnel lens or convex lens, the projection screen 26, and the lens group 29 arranged sequentially from bottom to top. The axis of the projection screen 26 coincides with or is parallel to the axis of the lens group 29.

[0035] like Figure 2As shown, the plane containing the middle cross-section of the atmosphere module 3 is defined as the second plane. The side projections of the first plane and the second plane are two intersecting straight lines, meaning their projection directions do not completely coincide. The middle cross-section of the atmosphere module 3 extends vertically. The light and shadow module 2 rotates around the pivot axis 214 line S1, gradually approaching or moving away from the atmosphere module 3. The central axis of the projection angle of the atmosphere module 3 is P2. The minimum angle β between P1 and P2 is between 0° and 180°, excluding 0° and including 180°, with a preferred range of 30° to 150°. The atmosphere module 3 includes a driving assembly mounted on the base 1, a second light source, a condenser cup, and at least one imaging element. In this embodiment, the atmosphere module 3 further includes a lampshade 35 located above the imaging element. The driving assembly drives the imaging element. The second light source, the condenser cup, and the imaging element are arranged sequentially from bottom to top. The imaging element is configured as an optical element and a pattern piece, wherein the optical element includes concave and convex textures, wherein at least some of the textures have different sizes or angles. In this embodiment, the optical element or the projection sheet includes multiple imaging areas with different transmittances. Light emitted from the second light source passes through these imaging areas to form multiple different projection areas. One projection area has different brightness and / or different color than another. At least a portion of the light and shadow from these multiple projection areas of different brightness and / or different color passes over the lyrics from a distance. The light emitted from the second light source passes through at least the optical element or the pattern sheet to form an outward-projecting ambient lighting effect, which is projected onto the ceiling, floor, or wall. The ambient lighting effect includes multiple distorted, elongated light and shadow lines, nebula light and shadow lines, or water ripple light and shadow lines. Some of the elongated light and shadow lines move horizontally and intersect with the lyrics projection and / or move vertically and intersect with the lyrics projection; or nebula light and shadow lines intersect with the lyrics or pattern projection from a distance; or at least a portion of the lighting effect moves between two adjacent lyrics or between two adjacent lines of lyrics. The ambient lighting effect gradually changes in relation to the album interface or the lighting effect overlapping with one of the lyrics. Figure 1 , Figure 2 and Figure 3As shown, when the middle cross-section of the light and shadow module 2 is perpendicular to the middle cross-section of the atmosphere module 3, the light and shadow module 2 projects horizontally, and the atmosphere module 3 projects upward, with the projected light effect of the atmosphere module 3 projecting onto the ceiling and walls. When the atmosphere module 3 projects upward, the projected light effect of the atmosphere module 3 projects onto the ceiling and walls, and the lyrics or pattern projection formed by the light and shadow module 2 coincides with the projected light effect formed by the atmosphere module 3 on the wall. When the atmosphere module 3 projects along the front-back direction, forming a light effect projected onto at least the wall, the lyrics or pattern projection formed by the light and shadow module 2 at least partially coincides with the light effect, and their central axes intersect or are parallel. When the atmosphere module 3 projects downward, the lyrics or pattern projection formed by the light and shadow module 2 at least partially coincides with the light effect, and their central axes intersect or are parallel. When the light and shadow module 2 moves upward or downward, the middle cross-section of the light and shadow module 2 intersects with or is parallel to the middle cross-section of the atmosphere module 3. The parallel middle cross-sections indicate that the light and shadow module 2 projects upward onto the atmosphere module 3, and the light and shadow module 2 projects downward. The projected lyrics are presented in the projected light effects in a way that fades in, changes, scrolls, or has particle effects, and the light effects that overlap with one of the lyrics are constantly changing.

[0036] In summary, the lyrics projection device of this utility model has the following beneficial effects.

[0037] (1) The light and shadow module 2 includes a first light source 22, a projection screen 26 located on the first light source 22, and a lens group 29 located above the projection screen 26. The light emitted by the first light source 22 passes through the projection screen 26 and the lens group 29 to form lyrics projection. The atmosphere module 3 includes a second light source and an imaging element located above the second light source. The imaging element is set as an optical element or a projector. The optical element or the projector includes multiple imaging areas with different transmittance. The light emitted by the second light source passes through multiple different imaging areas to form multiple different projection areas. One projection area has a different brightness and / or a different color than another projection area. At least part of the light and shadow of the multiple projection areas with different brightness and / or different colors passes over the lyrics from far to near. This makes the projection light effect and lyrics completely integrated, enhancing the atmosphere and scene immersion, and providing a good user experience.

[0038] (2) The lyrics projection device further includes a heat sink arranged around the axis of the projection screen and a Fresnel lens located below the heat sink. The Fresnel lens is located between the first light source and the projection screen. At least one side wall of the heat sink is in contact with the projection screen. The heat sink is connected downward to the Fresnel lens. The heat sink reduces the temperature of the Fresnel lens while dissipating heat from the projection screen.

[0039] (3) The ambient lighting effect includes multiple slender light and shadows with deformation, some of which move and intersect with the lyrics projection in the left and right direction and / or move and intersect with the lyrics projection in the up and down direction, increasing the sense of immersion and giving people a sense of stress relief.

[0040] The above detailed description is only a description of the preferred embodiment of this utility model and is not intended to limit the patent scope of this utility model. Therefore, all equivalent technical changes made using the content of this invention's specification and illustrations are included within the patent scope of this invention.

Claims

1. A lyrics projection device, characterized in that, include: The light and shadow module includes at least a first light source, a projection screen located on the first light source, and a lens group located above the projection screen. The light emitted by the first light source passes through the projection screen and the lens group to form lyrics or pattern projections. An ambient module includes a second light source and an imaging element located above the second light source. The imaging element is configured as an optical element or a projector. The optical element or the projector includes multiple imaging zones with different transmittance. Light emitted from the second light source passes through the multiple different imaging zones to form multiple different projection zones. One projection zone has a different brightness and / or a different color than another projection zone. At least part of the light effect of the multiple projection zones with different brightness and / or different colors passes over the lyrics or pattern from far to near.

2. The lyrics projection device as described in claim 1, characterized in that: The atmosphere module projects upwards, and the projection light effect of the atmosphere module is projected onto the ceiling and walls. The lyrics or pattern projection formed by the light and shadow module coincides with the projection light effect formed by the atmosphere module on the wall. The atmosphere module projects along the front-to-back direction, forming a light effect that is at least projected onto the wall. The lyrics or pattern projection formed by the light and shadow module at least partially coincides with the light effect, and their central axes intersect or are parallel. The atmosphere module projects downwards, and the lyrics or pattern projection formed by the light and shadow module at least partially coincides with the light effect, and their central axes intersect or are parallel.

3. The lyrics projection device as described in claim 1, characterized in that: The central axis of the light and shadow module is defined as P1, the central axis of the atmosphere module is defined as P2, and the minimum included angle β between P1 and P2 is between 0° and 180°.

4. The lyrics projection device as described in any one of claims 1-3, characterized in that: The ambient lighting effect includes multiple slender, deformed light and shadow lines, some of which move and intersect with the lyrics projection in the left-right direction and / or move and intersect with the lyrics projection in the up-down direction.

5. The lyrics projection device as described in any one of claims 1-3, characterized in that: The projection screen includes an axis C1, and the lyrics projection device further includes a heat sink arranged around the axis C1 and lenses located on both sides of the upper side of the heat sink. At least one sidewall or bottom surface of the heat sink is in contact with the projection screen. The heat sink includes heat sink fins arranged around the projection screen, and the heat sink is connected upward to the lenses.

6. The lyrics projection device as described in any one of claims 1-3, characterized in that: The projected lyrics are presented in the projected light effects in a way that fades in, changes, scrolls, or has particle effects, and the light effects that overlap with one of the lyrics are constantly changing.

7. The lyrics projection device as described in any one of claims 1-3, characterized in that: The projection screen includes a front side and a back side arranged opposite to each other. The projection screen includes an access terminal and a circuit board electrically connected to the access terminal. The circuit board is soldered to the front side. The front side of the projection screen faces the first light source, and the back side of the projection screen faces the lens group.

8. A lyrics projection device, characterized in that, include: The light and shadow module includes at least a first light source, a projection screen located on the first light source, and a lens group located above the projection screen. The light emitted by the first light source passes through the projection screen and the lens group to form lyrics projection. An ambient module includes a second light source, an optical element located above the second light source, and a lampshade. The optical element includes textured surfaces, wherein at least some of the textures are of different sizes or angles. Light emitted from the second light source passes through the optical element and the lampshade to form an outward-projected ambient light effect. At least some of the ambient light effect passes between two adjacent lyrics or between two adjacent lines of lyrics.

9. The lyrics projection device as described in claim 8, characterized in that: The cross-section of the light and shadow module along the front-to-back direction is defined as the first plane, and the cross-section of the atmosphere module along the up-down direction is defined as the second plane. The first plane and the second plane intersect.

10. The lyrics projection device as described in claim 8, characterized in that: The light and shadow module includes a base, a fixed seat housed in a cavity of the base, and a first light source, a projection screen, and a lens assembly mounted on the fixed seat. The base includes a first heat dissipation hole communicating with the cavity. The projection screen is mounted in the cavity of the fixed seat. The fixed seat includes a second heat dissipation hole communicating with the cavity. The second heat dissipation hole surrounds the projection screen. The first heat dissipation hole, the cavity, the second heat dissipation hole, and the cavity together form air convection to remove heat from the projection screen.

11. The lyrics projection device as described in claim 10, characterized in that: The light and shadow module includes at least the first light source, a light distribution Fresnel lens or convex lens, the projection screen, and the lens group arranged sequentially from bottom to top, wherein the axis of the projection screen coincides with or is parallel to the axis of the lens group.

Images