Screen illumination device

Abstract

To provide an illumination device for attachment to a screen.SOLUTION: A screen illumination device includes a body, a first light source, and a second light source. The body includes a first case and a second case. The second case is detachably connected to the first case. The first light source is connected to the body and adapted to generate a first light beam. The second light source is connected to the body and adapted to generate a second light beam. The first case is adapted to allow the first light beam to emit out along a first direction, the second case is adapted to allow the second light beam to emit out along a second direction, and the second direction is different from the first direction.SELECTED DRAWING: Figure 2A

Description

[Technical field]

[0001] The present invention relates to the lighting field, in particular to a lighting device mounted on a screen. [Background technology]

[0002] In order to obtain comfortable lighting when reading, the most common source of desktop lighting is a desk lamp. However, as computers become more and more popular, in addition to the desk lamp, the reader's desktop needs to further place computer-related devices such as a screen, a keyboard, a mouse, etc., and the desktop space becomes narrower.

[0003] In view of the above situation, currently there are lamps that are installed on screens, and the screen is used as a bracket for the lamp, thereby saving desktop space. In order to avoid using a conventional bulb that blocks the screen or is too heavy and changes the center of gravity of the screen, most of these lamps use a light-emitting unit that is small in volume, relatively lightweight and convenient as a light source, and have a relatively high degree of freedom in design.

[0004] The "Background Art" section is merely intended to aid in understanding the outline of the present invention, and may include known art not known to those skilled in the art. The contents disclosed in the "Background Art" do not mean the problems that the contents or one or more embodiments of the present invention are intended to solve, nor do they mean that the contents were already known or recognized by those skilled in the art before the filing of the present invention. Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention provides a screen illumination device that can provide two types of illumination light irradiated in different directions and can change the illumination style of one of the illumination lights according to demand. [Means for solving the problem]

[0006] Other objects and advantages of the present invention can be further understood based on the technical features disclosed in the present invention.

[0007] In order to achieve one, some or all of the above or other objects, an embodiment of the present invention provides a screen illumination device, the screen illumination device including a body, a first light source and a second light source. The body includes a first case and a second case. The second case is detachably connected to the first case. The first light source is connected to the body and is adapted to generate a first light flux. The second light source is connected to the body and is adapted to generate a second light flux. The first case is adapted for the first light flux to be emitted along a first direction, and the second case is adapted for the second light flux to be emitted along a second direction, the second direction being different from the first direction.

[0008] In one embodiment, the first case includes a first containing chamber and the first light source is located within the first containing chamber, and the second case has a second containing chamber and the second light source is located within the second containing chamber.

[0009] In one embodiment, the above-mentioned screen illumination device further includes a bracket portion, and the first case and the second case are connected by the bracket portion.

[0010] In one embodiment, the above-mentioned first case further includes a housing and an accommodating groove, the housing forms a first accommodating chamber and an accommodating groove, and the first accommodating chamber and the accommodating groove are respectively located on opposite sides of the housing, and the second case is adapted to be accommodated in the accommodating groove.

[0011] In one embodiment, the above-mentioned first light source and second light source are provided in a first case, the first case includes a first accommodating chamber and a combination part, the first light source is located in the first accommodating chamber, and the second light source is provided outside the first accommodating chamber, the combination part is located outside the first accommodating chamber and on the side of the second light source and is suitable to be joined to the second case, the second case includes a light entrance part, and when the second case is joined to the combination part, the light entrance part is directed toward the second light source, and the second light beam of the second light source is suitable to enter into the second case through the light entrance part.

[0012] In one embodiment, the first case described above has an axis, the axis being different from the first direction and the second direction, the second light source emits a second light beam along the axis, and the light entrance portion is located on the axis when the first case is joined to the second case.

[0013] In one embodiment, the above-mentioned screen illumination device further includes a light guide plate, the light guide plate having a light input surface and a light output surface, the second case has a second accommodating chamber, the light input portion is located on the second accommodating chamber side, the light guide plate is fixed in the second accommodating chamber, and the light input surface faces the light input portion and the light output surface faces the second direction.

[0014] In one embodiment, the above-mentioned body further includes a light-transmitting plate, and the second light beam is transmitted through the light-transmitting plate along the second direction.

[0015] In one embodiment, the above-mentioned light-transmitting plate further comprises a plurality of light-transmitting holes.

[0016] In one embodiment, the above-mentioned screen illumination device further includes a pattern generating unit, where the pattern generating unit is connected to the second case and arranged in the transmission path of the second light beam, and the pattern generating unit is suitable for converting the second light beam from an illumination light beam to a pattern light beam. Effect of the Invention

[0017] As can be seen from the above description, the present invention not only provides a first light beam directed in a first direction by a first case, but also generates a second light beam emitted in a second direction by a second case that is removably separated from the first case, so that the screen illumination device of the present invention can provide two types of illumination light directed in different directions and can convert the illumination style of the second light beam according to demand.

[0018] In order to make the above-mentioned and other objects, features and advantages of the present invention more comprehensible, the following embodiments will be described in detail with reference to the drawings. [Brief description of the drawings]

[0019] [Figure 1] FIG. 2 is a schematic diagram showing an assembly of a screen illumination device according to an embodiment of the present invention; [Figure 2A] FIG. 2 is an exploded view of the screen illumination device according to the embodiment of FIG. 1. [Figure 2B] FIG. 2 is a schematic cross-sectional view of a screen illumination device assembled in the embodiment of FIG. 1. [Figure 3A] FIG. 11 is a schematic diagram of a screen illumination device according to another embodiment of the present invention; [Figure 3B] FIG. 3B is a schematic cross-sectional view of the screen illumination device according to the embodiment of FIG. 3A. [Figure 4] 13 is a schematic cross-sectional view of an attachment location of a second case in another embodiment of the present invention. FIG. [Diagram 5] 11 is a schematic cross-sectional view of a screen illumination device according to still another embodiment of the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] The above and other technical contents, features and effects of the present invention will become apparent from the preferred embodiments described in detail below with reference to the drawings. The directional terms referred to in the following embodiments, such as "upper", "lower", "left", "right", "front" or "rear", are simply directions with reference to the drawings. Therefore, the directional terms used are used to describe the present invention, and are not intended to limit the present invention.

[0021] Fig. 1 is a schematic diagram of an assembled screen illumination device according to an embodiment of the present invention. Fig. 2A is an exploded view of the embodiment screen illumination device of Fig. 1. Fig. 2B is a schematic cross-sectional view of the assembled screen illumination device in the embodiment of Fig. 1.

[0022] As shown in Figs. 1 to 2B, a screen illumination device 1 according to an embodiment of the present invention includes a main body 2, a first light source 3, and a second light source 4. The main body 2 includes a first case 21 (shown in Fig. 2A) and a second case 22 (shown in Fig. 2A). The second case 22 is detachably connected to the first case 21. The first light source 3 (shown in Fig. 2B) is connected to the main body 2 and is adapted to generate a first light flux L1. The second light source 4 is connected to the main body 2 and is adapted to generate a second light flux L2. The first case 21 is adapted to emit the first light flux L1 along a first direction D1, and the second case 22 is adapted to emit the second light flux L2 along a second direction D2, which is different from the first direction D1.

[0023] Specifically, as shown in Fig. 1, the main body 2 is, for example, elongated. When attached, the main body 2 is attached to the upper edge of a screen (not shown) by a hanger (not shown), and the long axis direction E1 of the main body 2 is, for example, parallel to the upper edge of the screen. For example, the main body 2 can be rotated relative to the hanger around the long axis direction E1 of the main body 2 as an axis, so that the first direction D1 and the second direction D2 determined by the first case 21 and the second case 22 can be rotated relative to the screen.

[0024] As shown in FIG. 2A and FIG. 2B, in this embodiment, the first case 21 includes, for example, a housing 21A, an accommodating groove 212, and a first accommodating chamber S1. Specifically, in this embodiment, the housing 21A forms a first accommodating chamber S1 and two accommodating grooves 212, and the first accommodating chamber S1 and these accommodating grooves 212 are located on opposite sides of the housing 21A, respectively, and the accommodating grooves 212 are arranged along the longitudinal direction E2 of the housing 21A. Specifically, the first accommodating cavity S1 and each accommodating groove 212 are not connected, which means that the first accommodating cavity S1 and each accommodating groove 212 are separated by the shell 21A. The housing 21A has, for example, a first opening 212c, which is located in the first direction D1 and communicates with one accommodating chamber S1. The accommodation groove 212 is, for example, a rectangular parallelepiped groove body of the housing 21A recessed into the first accommodation chamber S1 along the second direction D2, and is formed by the shell 21A having a bottom surface 212a. The accommodation groove 212 is used to accommodate the second case 22 when the first case 21 and the second case 22 are combined, and is connected to the second case 22 by, for example, an insertion hole 212b opened in the bottom surface 212a.

[0025] The shape of the accommodating groove 212 is not limited to the shapes listed above, and in other embodiments not shown, the accommodating groove 212 formed in the housing 21A may be configured, for example, by an opening communicating with the first accommodating chamber S1, and the second case 22 may be provided as a case for engaging with the periphery of the accommodating groove 212 (opening); in other words, the relative position between the first accommodating chamber S1 and the accommodating groove 212 may be changed, and the shape of the accommodating groove 212 is not limited to the shapes listed above.

[0026] 2A and 2B, in this embodiment, the main body 2 further includes, for example, a light-transmitting plate 211. The shape of the light-transmitting plate 211 corresponds to the shape of the opening of the accommodating groove 212. The light-transmitting plate 211 is used to cover the accommodating groove 212 and the second housing 22, and after the second housing 22 is installed in the accommodating groove 212, the light-transmitting plate 211 faces the second direction D2.

[0027] The first light source 3 is located in the first containing chamber S1. The first light source 3 is, for example, a light bar, and the light bar includes, for example, a number of light-emitting diodes (LEDs). These light-emitting diodes are, for example, arranged in the first containing chamber S1 along the longitudinal direction E1 of the main body 2, and the first light flux L1 generated by the light-emitting diodes in cooperation with each other is, for example, illumination light, and its color is, for example, white, but the color and type of the first light source 3 are not limited thereto.

[0028] As shown in FIG. 2A and FIG. 2B, the screen illumination device 1 in this embodiment may further include, for example, a circuit board 213 (shown in FIG. 2B), a reflector 214, and a diffusion plate 215. The circuit board 213 is located in the first accommodation chamber S1, and obtains an external power source, for example, through a joint 2131 drilled in the center of the first case 21, and controls the operation of the first light source 3, for example, the intensity or color temperature of light emission, together with a button 216 and a rotating disk (not shown, electrically connected to the circuit board 213) attached to the first case 21, but is not limited thereto. The reflector 214 is located in the first accommodation chamber S1, and is located in the optical path of the first light source 3. The diffusion plate 215 is provided, for example, so as to cover the entire first opening 212c. The specific type or shape design of the unit associated with the first case 21 is not limited to those listed above.

[0029] As shown in FIG. 2A and FIG. 2B, in this embodiment, the main body 2 has, for example, two second cases 22. Each second case 22 has, for example, a second accommodation chamber S2 (shown in FIG. 2B). Since the detailed structures of the two second cases 22 are the same, only the design of one second case 22 will be described below. Specifically, the second case 22 includes, for example, a support plate 221 and a cover plate 222, and the support plate 221 and the cover plate 222 are disposed in the second accommodation cavity S2. The support plate 221 is, for example, a U-shaped plate extending along the longitudinal direction E1 of the main body 2, and has a second opening 221a opening toward the second direction D2, and the cover plate 222 covers the second opening 221a and forms the second case 22 together with the support plate 221.

[0030] In this embodiment, the second light source 4 is located in the second containing chamber S2, and the second light beam L2 is emitted toward the second opening 221a through the cover plate 222. The second light source 4 may be, for example, a light-emitting module capable of changing the color of the second light beam L2, for example, having a plurality of light-emitting diodes (not shown) for generating light beams of different colors, for example, the light-emitting diodes including red, blue and green, and the light-emitting intensities between the light-emitting diodes are different from each other, so that the colors can be mixed to generate the second light beams L2 of different colors. In other words, in this embodiment, the color of the second light beam L2 generated by the second light source 4 can be changed by a control circuit not shown, but the detailed type and function of the second light source 4 are not limited to those described above.

[0031] Regarding the electrical connection, the support plate 221 includes, for example, a connection portion 221b on one side away from the second accommodating chamber S2. One end of the connection portion 221b is electrically connected to the second light source 4, and the other end protrudes away from the second opening 221a from the surface of the support plate 221, passes through the insertion hole 212b of the accommodating groove 212 of the housing 21A, and is used to extend into the first case 21 and be electrically connected to the circuit board 213. With this structure, the user can control the light emission mode of the second light source 4 by a button (not shown) or a knob (not shown) provided on the first case 21, but is not limited thereto.

[0032] In this embodiment, the second light source 4 and the cover plate 222 are arranged along the second direction D2, and the cover plate 222 is, for example, a diffusion plate, and the cover plate 222 has a light input surface 222a and a light output surface 222b, the light input surface 222a faces the second light source 4, and the second light flux L2 passes through the cover plate 222 and is output to the second opening 221a, but is not limited thereto. In another embodiment, the cover plate 222 is, for example, a light guide plate, and the second light source 4 emits the second light flux L2 along the long axis direction E1 of the body 2, and in this case, the second light source 4 and the cover plate 222 are arranged along the long axis direction E1 of the body 2. The cover plate 222 has a light input surface and a light output surface (not shown), and the light input surface faces the second light source 4, while the light output surface determines the orientation of the second direction D2. The specific type or shape design of the associated units of the second case 22 is not limited to those listed above, and will be described in detail below. It should be understood that the number of second cases 22 and second light sources 4 corresponds to the number of accommodating grooves 212, so that in other embodiments not shown, the screen illumination device 1 may have only one second case 22 and only one second light source 4.

[0033] FIG. 3A is a schematic diagram of a combination of a screen illumination device according to another embodiment of the present invention. FIG. 3B is a schematic cross-sectional view of the screen illumination device according to the embodiment of FIG. 3A. In the screen illumination device 1' of this embodiment, the structure of the first case 21' may be substantially the same as that of the above-mentioned embodiment, so only the difference will be described here. Note that the two second cases 22' in this embodiment have the same structure, so only the structure of one of the second cases 22' will be described.

[0034] As shown in FIG. 3A, in this embodiment, unlike the embodiment of FIG. 2A described above, the first case 21', in addition to including the first receiving chamber S1, further includes two combination parts 217, and does not have the above-mentioned receiving groove 212. The two combination parts 217 are suitable for joining to the second case 22'. The shape of the combination part 217 is, for example, similar to the receiving groove 212 in the above-mentioned embodiment, but is not limited thereto, and the two combination parts 217 are, for example, similarly arranged along the longitudinal direction E1 of the first case 21', but the detailed shape of the combination part 217 is not limited thereto, for example, in FIG. 3B, the combination part 217 may be an opening (not shown because it is covered by the second case 22' after being combined).

[0035] As shown in FIG. 3A, the first case 21' in this embodiment has an axis A along the longitudinal direction, and the extending direction of the axis A is different from the first direction D1 and the second direction D2, for example, parallel to the longitudinal direction E1 of the main body 2'. The second light source 4' is provided in the first case 21' and located outside the first receiving chamber S1. The number of the second light source 4' may be, for example, one, and provided between the two combination parts 217, each having an opening 41 toward the combination parts 217 on both sides, in other words, the two combination parts 217 and the first receiving cavity S1 are separated by a shell 21A' (not shown), and the two combination parts 217 are located outside the first receiving chamber S1 and located on different sides of the second light source 4' along the axis A. In operation, the second light flux L2 generated by the second light source 4' is emitted directly or through the opening 41 toward the two combination parts 217 along different directions on the axis A, but is not limited thereto. In other embodiments, the second light source 4' may be multiple, disposed in the first case 21' and located outside the first containing chamber S1, and corresponding to two combination parts 217 respectively, that is, when operating, the second light beam L2 generated by each second light source 4' is emitted directly or through the opening 41 along the axis A toward the corresponding combination part 217.

[0036] In this embodiment, the second case 22' includes, for example, a housing 22A, a light-transmitting plate 222', and a light-guiding plate 223, and the housing 22A surrounds a groove body 201 similar to the above-mentioned receiving groove 212. The light-transmitting plate 222' covers the opening of the groove body 201 and forms a second receiving chamber S2 together with the groove body 201. The second receiving chamber S2, i.e., one side of the groove body 201, has a light-entering part 202 (shown in FIG. 3A) through which light can pass, and the light-entering part 202 is, for example, a part or hole in the housing 22 that can transmit light. When assembled, the light-guiding plate 223 is fixed in the second receiving chamber S2, and the light-entering surface 223a of the light-guiding plate 223 faces the light-entering part 202. When the second case 22' is joined to the combination portion 217, the light entrance portion 202 faces the second light source 4', and the second light beam L2 of the second light source 4' is adapted to enter the second case 22' through the light entrance portion 202.

[0037] According to the above-described structure, when the first case 21' and the two second cases 22' are joined together, the light entrance portion 202 is located on the axis A. When the second light source 4' generates the second light flux L2, the second light flux L2 is emitted to the light entrance portion 202 of the second case 22' along the axis A, and further to the light entrance surface 223a of the light guide plate 223, and is emitted from the light exit surface 223b of the light guide plate 223 in the second direction D2.

[0038] In this embodiment, the screen illumination device 1' further includes a pattern generating unit 5. The pattern generating unit 5 is connected to the second case 22' and arranged in the transmission path of the second light beam L2. The pattern generating unit 5 is adapted to convert the second light beam L2 into a pattern light beam L3. Specifically, the pattern generating unit 5 in this embodiment is, for example, a light-shielding pattern arranged on the light-transmitting plate 222'. When the second light beam L2 passes through the light-transmitting plate 222', a part of the second light beam L2 is shielded by the pattern generating unit 5 to generate a pattern light beam L3 corresponding to the shape of the light-shielding pattern.

[0039] In other embodiments not shown, the pattern generating unit 5 may include a filter pattern having a plurality of different color portions, and after the second light beam L2 passes through the light-transmitting plate 222', the second light beam L2 passing through the filter pattern may become a pattern light beam having different colors. In one embodiment, the light-transmitting plate 222' itself may be the pattern generating unit 5, and specifically, a plurality of lenses may be formed in a portion of the light-transmitting plate 222', and a portion of the second light beam L2 may be deflected to generate a pattern, so as to diversify the pattern. In another embodiment similar to the embodiment of FIG. 3A, the pattern generating unit 5 may be changed to be disposed on the light output surface 223b of the light guide plate 223, and may be, for example, a fine structure of the light guide plate 223, and the light emitted by the distribution of the fine structure may be expressed as a pattern, or in another embodiment similar to the embodiment of FIG. 2A, the pattern generating unit 5 may be disposed on the light output surface 222b of the cover plate 222, and may be, for example, a fine structure of the cover plate 222. It should be understood that in different embodiments, the installation manner and aspect of the pattern generating unit 5 are not limited to those listed above.

[0040] 4 is a schematic cross-sectional view of the attachment portion of the second case in another embodiment of the present invention. In this embodiment, the first case (not shown) may be the same as the design of the embodiment of FIG. 3A described above, while the detailed design of the second case 22'' may be changed, and only the changed parts will be described below.

[0041] As shown in FIG. 4, in this embodiment, the light exit surface 223b of the light guide plate 223 is covered with, for example, a diffusion plate 215′, and a reflective layer 7 is provided on the contact surface where the light guide plate 223 and the second case 22″ are in contact with each other. The light-transmitting plate 222′ has, for example, a plurality of light-transmitting holes 222c. In a similar embodiment, the pattern generating unit 5 may be formed by arranging a pattern using the light-transmitting holes 222c, but is not limited thereto.

[0042] As can be seen from the above, the detailed structure of the second case in each embodiment of the present invention can be changed according to the position of the second light source, and the user can change the detailed structure of the second case according to the installation or needs of generating a pattern light beam.

[0043] FIG. 5 is a schematic cross-sectional view of a screen illumination device according to another embodiment of the present invention. As shown in FIG. 5, in this embodiment, the screen illumination device 1" further includes a bracket portion 6, and the first case 21" and the second case 22" (for ease of illustration, the detailed structure is not drawn) are connected by the bracket portion 6. As shown in FIG. 5, specifically, the bracket portion 6 may be, for example, composed of a plurality of pins 61, and the first case 21" and the second case 22" may be provided with holes 62 corresponding to the pins 61, but is not limited thereto. It should be understood that the shape of the bracket portion 6 may be changed according to needs. In some embodiments, the connection position or angle between the bracket portion 6 and the second case 22" may be changed, in other words, the connection position or direction between the bracket portion 6 and the second case 22", and thus the design of the bracket portion 6 may be changed so that the second direction D2 in which the second case 22 faces can be changed by having a rotation axis (not shown).

[0044] As can be seen from the above description, the present invention not only provides a first light beam directed in a first direction by a first case, but also generates a second light beam emitted in a second direction by a second case that is removably separated from the first case, so that the screen illumination device of the present invention can provide two types of illumination light directed in different directions and can change the illumination style of the second light beam according to demand.

[0045] The above is merely a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Simple equivalent changes and modifications made based on the claims and the contents of the specification of the present invention are all within the scope of the patent of the present invention. Any one embodiment or claim of the present invention does not necessarily achieve all the objectives, advantages or features disclosed in the present invention. The abstract and the title of the invention are merely intended to assist in searching patent documents, and are not intended to limit the scope of the present invention. The terms "first", "second", etc., referred to in the present specification or claims are merely intended to name the units (elements) or distinguish between different embodiments or ranges, and are not intended to limit the upper or lower limit of the number of units. [Explanation of symbols]

[0046] 1, 1', 1'' Screen lighting device 2, 2' Main body 21, 21', 21'' Case 1 21A Housing 211 Light transmission plate 212 Storage Groove 212a Bottom 212b Insertion hole S1 First Containment Chamber 212c First opening 213 Circuit Board 2131 Joint 214 Reflector 215, 215' Diffuser 216 Button 217 Combination section 22, 22', 22'' Second Case 22A Housing 201 Groove body 201 Light receiving part S2 Secondary Containment Chamber 221 Support plate 221a Second opening 221b Connection 222, 222', 222'' light transmission plate 222a Light entrance surface 222b Idemitsu surface 222c light transmission hole 223 Light guide plate 223a Light entrance surface 223b Idemitsu surface 3. First Light Source 4, 4' Second light source 41 Open hole 5 Pattern Generation Unit 6 Bracket part 61 pin 62 holes 7 Reflective layer L1 First light beam L2 Second light beam L3 Pattern light beam D1 First direction D2 Second direction E1, E2 Long axis direction A axis

Claims

1. A screen illumination device, comprising: a main body including a first case and a second case, the second case being removably connected to the first case; a first light source coupled to the body and adapted to generate a first light flux; a second light source coupled to the body and adapted to generate a second light flux; Including, A screen illumination device, wherein the first case is adapted for the first light beam to be emitted along a first direction, and the second case is adapted for the second light beam to be emitted along a second direction, the second direction being different from the first direction.

2. 2. The screen illumination device of claim 1, wherein the first case includes a first containing chamber and the first light source is located within the first containing chamber, and the second case has a second containing chamber and the second light source is located within the second containing chamber.

3. 3. The screen illumination device according to claim 2, further comprising a bracket portion, the first case and the second case being connected by the bracket portion.

4. 3. The screen illumination device according to claim 2, wherein the first case further includes a housing and an accommodating groove, the housing forms the first accommodating chamber and the accommodating groove, and the first accommodating chamber and the accommodating groove are respectively located on opposite sides of the housing, and the second case is adapted to be accommodated in the accommodating groove.

5. 2. The screen illumination device according to claim 1, wherein the first light source and the second light source are provided in the first case, the first case includes a first accommodating chamber and a combination part, the first light source is located in the first accommodating chamber, and the second light source is provided outside the first accommodating chamber, the combination part is located outside the first accommodating chamber and on the side of the second light source and is suitable for joining to the second case, the second case includes a light entrance part, and when the second case is joined to the combination part, the light entrance part faces the second light source, and the second light flux of the second light source is suitable for entering the second case through the light entrance part.

6. 6. The screen illumination device according to claim 5, wherein the first case has an axis, an extending direction of the axis is different from the first direction and the second direction, the second light source emits the second light beam along the axis, and the light entrance portion is located on the axis when the first case is joined to the second case.

7. 6. The screen illumination device of claim 5, further comprising a light guide plate, the light guide plate having a light entrance surface and a light exit surface, the second case having a second accommodating chamber, the light entrance portion being located on the second accommodating chamber side, the light guide plate being fixed in the second accommodating chamber, the light entrance surface facing the light entrance portion, and the light exit surface facing the second direction.

8. 2. The screen illumination device according to claim 1, wherein the body further comprises a light-transmitting plate, and the second light flux passes through the light-transmitting plate and is emitted along the second direction.

9. 9. The screen illumination device according to claim 8, wherein the light-transmitting plate further has a plurality of light-transmitting holes.

10. 2. The screen illumination device according to claim 1, further comprising a pattern generating unit, the pattern generating unit being connected to the second case and disposed in a transmission path of the second light beam, the pattern generating unit being suitable for converting the second light beam into a pattern light beam.

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