CN217356778U - Lamp set - Google Patents

Abstract

The present application provides a light fixture. The lamp comprises a lampshade, a light source, a frame and an optical plate, wherein the lampshade is provided with a cover cavity and a light outlet communicated with the cover cavity, and the light source is arranged in the cover cavity; the frame is of an integrated structure and is provided with a first cavity structure and a second cavity structure which are arranged at intervals; the cavity opening of the first cavity structure is arranged towards the lampshade in an open mode, and the edge of the lampshade is accommodated and fixed in the first cavity structure; the cavity opening of the second cavity structure is arranged towards the optical plate in an open mode, and the edge of the optical plate is accommodated and fixed in the second cavity structure; the optical plate covers the light outlet, and at least part of light of the light source is emitted out of the cover cavity through the transmission optical plate. The lamp provided by the application has the advantages that the frame is arranged into an integrated structure, the edge of the lampshade and the edge of the optical plate are accommodated and fixed through the cavity structure formed in the frame, the overall structure of the frame is simplified, the assembly mode of the frame, the lampshade and the optical plate is simplified, and the manufacturing cost and the assembly cost of the frame are low.

Description

Lamp set

Technical Field

The application belongs to the technical field of lighting equipment, and more specifically relates to a lamp.

Background

The existing teaching lamps applied to teaching scenes, such as grille lamps and micro-prism panel lamps, generally comprise a power supply drive, a lampshade, a light source, a frame and an optical plate group. The lamp shade is provided with a cavity, the cavity is provided with an open light outlet, the power supply is driven to be arranged on the back face of the lamp shade and used for providing electric energy for the light source, the light source is arranged inside the cavity, and the light source emits partial or all light rays through the light outlet. The frame is fixedly connected to the edge of the light outlet, the optical plate group is arranged in the frame, and the optical plate group can transmit light rays emitted by the light source. The optical plate group comprises a grating plate and a diffusion plate which are arranged in a stacked mode, or the optical plate group comprises a micro-prism crystal panel and a diffusion plate which are arranged in a stacked mode.

Referring to fig. 1, in the teaching lamp in the prior art, a frame 10' is mostly in a split assembly type structure. The frame 10 ' includes two long frames 101 ' disposed opposite to each other and two short frames 102 ' disposed opposite to each other. Punching is needed at the connecting part of the long and short frames 101 ', and then the long and short frames are connected by adopting a die-casting metal connecting piece 103 ' or an injection molding plastic connecting piece 103 ', wherein the cost of the die-casting process or the injection molding process is higher. In addition, in order to enhance the bearing of the frame 10 ', the prior art needs to specially design the structure of the connecting member 103', and make a fixing post 104 'at the joint of the connecting member 103', and make a punching process on the fixing post 104 ', so that the connecting member 103' is difficult to design and complex to assemble.

Therefore, the split assembled frame adopted by the existing lamp has a complex structure and high manufacturing cost, and cannot avoid the existence of splicing gaps, so that the attractiveness of the product is difficult to meet the requirement of yield.

Disclosure of Invention

An object of the embodiment of the application is to provide a lamp, in order to solve the teaching lamps and lanterns that exist among the prior art and lead to the technical problem that structure is complicated, manufacturing cost is high and the outward appearance nature is poor owing to adopt components of a whole that can function independently pin-connected panel frame.

In order to achieve the purpose, the technical scheme adopted by the application is as follows:

providing a lamp, wherein the lamp comprises a lampshade, a light source, a frame and an optical plate, the lampshade is provided with a cover cavity and a light outlet communicated with the cover cavity, and the light source is arranged in the cover cavity; the method is characterized in that:

the frame is of an integrated structure and is provided with a first cavity structure and a second cavity structure which are arranged at intervals; the opening of the first cavity structure is arranged towards the lampshade in an open mode, and the edge of the lampshade is accommodated and fixed in the first cavity structure; the cavity opening of the second cavity structure is arranged towards the optical plate in an opening mode, and the edge of the optical plate is accommodated and fixed in the second cavity structure; the optical plate covers the light outlet, and at least part of light rays of the light source are emitted out of the cover cavity through transmission of the optical plate.

In one embodiment, a bending structure which is bent towards the frame is arranged at the edge of the lampshade, and a connecting hole structure is arranged at the edge of the lampshade;

the first cavity structure comprises a first accommodating cavity and a second accommodating cavity which are arranged at intervals, the mouths of the first accommodating cavity and the second accommodating cavity are both arranged towards the opening of the lampshade, the bending structure is accommodated in the first accommodating cavity, the connecting hole structure is arranged in a part of structure penetrating through the connecting piece, and the second accommodating cavity is arranged in another part of structure accommodating the connecting piece.

In an embodiment, the lamp further includes the connecting member, a part of the connecting member is inserted into the connecting hole structure, another part of the connecting member is accommodated in the second accommodating cavity by interference fit, and the lamp shade and the frame are fixed to each other by the connecting member.

In one embodiment, the first cavity structure and the second cavity structure are sequentially arranged along the thickness direction of the optical plate; along the face direction of optical plate spare, first holding chamber with the second holding chamber sets gradually.

In one embodiment, the edge of the lamp shade includes a straight structure and the bent structure, the straight structure extends outwards from the edge of the light outlet, and the straight structure and the light outlet are arranged in a flush manner; the bending structure is bent towards the frame from one side of the straight structure, which deviates from the light outlet, and the connecting hole structure is arranged on the straight structure.

In an embodiment, along a plate surface direction of the optical plate, a size of the first receiving cavity is larger than a size of the second receiving cavity, and the bending structure and the first receiving cavity are in clearance fit.

In one embodiment, along the thickness direction of the optical plate, the size of the second cavity structure is larger than the thickness size of the optical plate; the lamp further comprises a fixing piece, and the edge of the optical plate is clamped in the second cavity structure through the fixing piece.

In an embodiment, the frame has a square frame structure, the first cavity structure continuously extends along a circumferential direction of the frame to form a circumferentially-conducting annular cavity, and the second cavity structure continuously extends along the circumferential direction of the frame to form a circumferentially-conducting annular cavity.

In one embodiment, the frame is a square frame structure, the frame includes a pair of long frames and a pair of short frames, the long frames and the short frames are connected by a circular chamfer, the first cavity structure and the second cavity structure are arranged on the long frames and the short frames, and the circular chamfer is arranged in a space-saving manner.

In one embodiment, the optical plate includes a grid plate and a diffusion plate arranged in a stacked manner;

alternatively, the optical plate comprises a micro-prism anti-glare plate and a diffusion plate which are arranged in a stacked mode.

The application provides a lamps and lanterns's beneficial effect lies in:

compared with the prior art, the lamp provided by the application has the advantages that the adopted frame is of an integrated structure, so that the split assembled frame used in the prior art is replaced. The frame is provided with a first cavity structure and a second cavity structure which are arranged at intervals, wherein the cavity opening of the first cavity structure is arranged towards the lampshade in an open mode, and the edge of the lampshade is accommodated and fixed in the first cavity structure. Wherein the mouth of the second cavity structure is open towards the optical plate, and the edge of the optical plate is accommodated and fixed in the second cavity structure.

The application provides a lamp sets up the frame to integral type structure, through the cavity structure holding that constructs above that and the edge of fixed lamp shade and the edge of optics plate, has simplified the overall structure of frame to and the equipment mode of frame and lamp shade, optics plate has been simplified, and the manufacturing cost and the equipment cost of frame are low. And the cavity structure holds the edge of the lampshade and the edge of the optical plate in the cavity structure, no gap exists at the periphery of the whole frame, the attractiveness of the product is improved, and the yield of the product is synchronously improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

FIG. 1 is a schematic view of a bezel used in a prior art lamp;

fig. 2 is an exploded view of a lamp provided in an embodiment of the present application;

FIG. 3 is a schematic cross-sectional view of a connection between a bezel and a lamp housing and an optical panel according to an embodiment of the present disclosure;

FIG. 4 is a schematic cross-sectional view of a bezel provided in an embodiment of the present application;

FIG. 5 is a schematic diagram of a bezel provided in an embodiment of the present application;

FIG. 6 is an enlarged view of portion A of FIG. 5;

FIG. 7 is a schematic diagram of a bezel provided in an embodiment of the present application;

fig. 8 is an enlarged view of portion B of fig. 7.

Wherein, in the figures, the respective reference numerals:

10', a frame; 101', a long frame; 102', a short border; 103', a connecting piece; 104', a fixed support;

10. driving by a power supply; 20. a lamp shade; 30. a light source; 40. a frame; 50. an optical plate; 60. a connecting member; 70. a fixing member;

201. a straight structure; 202. a bending structure; 20a, a light outlet; 201a, a connecting hole structure;

401. a first cavity structure; 402. a second cavity structure; 403. a long frame; 404. a short frame; 405. rounding and chamfering; 401a, a first accommodating cavity; 401b, a second accommodating cavity;

501. a diffusion plate; 502. a grid plate;

701. a first fixed wall; 702. a second fixed wall; 703. a first abutment wall; 704. a second abutment wall.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

The lamp provided in the embodiment of the present application will now be described.

Referring to fig. 2 to 8, a lamp according to an embodiment of the present disclosure includes a power driver 10, a lamp shade 20, a light source 30, a frame 40, an optical plate 50, a connecting member 60, and a fixing member 70.

The lampshade 20 has a cover cavity and a light outlet 20a communicated with the cover cavity, the light source 30 is disposed in the cover cavity, and at least part of light emitted by the light source 30 can exit out of the lampshade 20 through the light outlet 20 a. In the embodiment of the present application, the power driver 10 is disposed on the back of the lamp housing 20 for providing power to the light source 30. The lamp housing 20 may be a transparent or non-transparent arrangement.

In an embodiment, the lampshade 20 is made of a transparent material, a part of the light emitted by the light source 30 can penetrate through the wall thickness of the lampshade 20 to reach the back surface of the lampshade 20, and the other part of the light is emitted out of the lampshade 20 through the light outlet 20a, so that the lamp is an omnidirectional light-emitting lamp.

In one embodiment, the lamp housing 20 is made of a non-transparent material, and out of the light emitted from the light source 30, all the light is emitted out of the lamp housing 20 through the light outlet 20a, and the lamp is a directional light-emitting lamp.

In the embodiment of the present application, the frame 40 is an integrated structure, and the frame 40 is a ring frame structure, which may be a square frame structure, a circular frame structure, or other regular or irregular frame structures. In other embodiments, the frame 40 may have an open non-circular frame structure, such as a U-shaped frame structure or a C-shaped frame structure, and the specific structure of the frame 40 is not specifically limited in this embodiment.

The frame 40 has a first cavity structure 401 and a second cavity structure 402 arranged at intervals. The opening of the first cavity structure 401 is open toward the lamp cover 20, and the edge of the lamp cover 20 is accommodated and fixed in the first cavity structure 401. The opening of the second cavity structure 402 is open toward the optical plate 50, and the edge of the optical plate 50 is received and fixed in the second cavity structure 402. Wherein the optical plate 50 covers the light outlet 20a, and at least part of the light source 30 exits the cover cavity through the transmissive optical plate 50.

In the lamp provided by the embodiment of the application, the adopted frame 40 is of an integrated structure so as to replace the split assembled frame 40 used in the prior art. The frame 40 is provided with an integrated structure, the edge of the lampshade 20 and the edge of the optical plate 50 are accommodated and fixed through the cavity structure constructed on the frame 40, the overall structure of the frame 40 is simplified, the assembly mode of the frame 40, the lampshade 20 and the optical plate 50 is simplified, and the manufacturing cost and the assembly cost of the frame 40 are low. Moreover, the cavity structure accommodates the edge of the lampshade 20 and the edge of the optical plate 50 therein, no gap exists at the periphery of the whole frame 40, the attractiveness of the product is improved, and the yield of the product is synchronously improved.

Referring to fig. 3 and 4, in an embodiment, the edge of the lamp cover 20 is provided with a bending structure 202 bent toward the frame 40, and the edge of the lamp cover 20 is provided with a connection hole structure 201 a; the first cavity structure 401 includes a first accommodating cavity 401a and a second accommodating cavity 401b arranged at an interval, the openings of the first accommodating cavity 401a and the second accommodating cavity 401b are both opened towards the lamp cover 20, the bending structure 202 is accommodated in the first accommodating cavity 401a, the connecting hole structure 201a is provided for a partial structure penetrating the connecting member 60, and the second accommodating cavity 401b is provided for another partial structure accommodating the connecting member 60.

In an embodiment, a part of the connecting member 60 is inserted into the connecting hole structure 201a, another part of the connecting member 60 is accommodated in the second accommodating cavity 401b by interference fit, and the lamp cover 20 and the frame 40 are fixed to each other by the connecting member 60.

For example, a screw may be used as the connecting member 60, preferably a self-tapping screw, the screw is driven into the upper side of the edge of the lamp cover 20, the screw passes through the connection hole structure 201a on the edge and is in threaded connection with the connection hole structure 201a, the end portion of the screw passes through the connection hole structure 201a and enters the inside of the second receiving cavity 401b, and the end portion is in interference fit with the inner wall of the second receiving cavity 401b, so that the two are relatively fixed.

In the embodiment of the present application, along the thickness direction of the optical plate 50, the first cavity structure 401 and the second cavity structure 402 are sequentially disposed, so as to stagger the connection position of the lampshade 20 and the frame 40 and the connection position of the optical plate 50 and the frame 40, so as to avoid mutual interference.

In this embodiment, the first accommodating cavity 401a and the second accommodating cavity 401b are sequentially arranged along the surface direction of the optical plate 50. In addition, along the plate surface direction of the optical plate 50, the size of the first accommodating cavity 401a is larger than that of the second accommodating cavity 401b, and preferably, the bending structure 202 and the first accommodating cavity 401a are in clearance fit.

Thus, the first accommodating cavity 401a accommodates the bending structure 202 therein, while a gap is maintained between the bending structure 202 and the first accommodating cavity 401a, the edge of the lampshade 20 and the second accommodating cavity 401b are fixedly connected by the connecting member 60, the bending structure 202 can be easily placed in the first accommodating cavity 401a during assembly, and then the connecting member 60 is tightened, so that the connection operation between the lampshade 20 and the frame 40 can be simplified.

In other embodiments, the bending structure 202 and the first receiving cavity 401a may be both fitted or may be both fitted with interference. When the bending structure 202 and the first receiving cavity 401a are in interference fit, the connection strength between the lamp cover 20 and the frame 40 is stronger, but the assembly of the frame 40 requires a larger external force, which complicates the assembly operation of the frame 40.

More specifically, referring to fig. 1, the edge of the lamp cover 20 includes a straight structure 201 and a bent structure 202, the straight structure 201 extends outward from the opening of the light outlet 20a, and the straight structure 201 and the light outlet 20a are arranged in a flush manner; the bending structure 202 is bent from one side of the straight structure 201 departing from the light exit 20a toward the frame 40, and the connecting hole structure 201a is opened on the straight structure 201.

Thus, the bending structure 202 and the connection hole structure 201a are spaced apart along the board surface direction of the optical case, the bending structure 202 is located at the outer side and is accommodated in the first accommodating cavity 401a, the appearance portion connected thereto is the peripheral surface of the frame 40, the connection member 60 is located in the connection hole structure 201a, the connection member 60 is located at the inner side of the bending structure 202 and is far away from the peripheral surface of the frame 40, and the attractiveness of the whole lamp can be improved.

In one embodiment, along the thickness direction of the optical plate 50, the size of the second cavity structure 402 is larger than the thickness dimension of the optical plate 50; the edge of the optical plate member 50 is snap-fitted into the second cavity structure 402 by means of the fixture 70.

Specifically, referring to fig. 3, the fixing member 70 is an integrally formed structure, and has a first fixing wall 701 and a second fixing wall 702 that are vertically connected, a part of an outer wall of the first cavity structure 401 abuts against a right angle of the first fixing wall 701 and the second fixing wall 702, the fixing member 70 further has a first abutting wall 703 and a second abutting wall 704, the first abutting wall 703 is connected to an end of the first fixing wall 701 that is far away from the second fixing wall 702, the second abutting wall 704 is connected to a connection point of the first fixing wall 701 and the second fixing wall 702, the first abutting wall 703 and the second abutting wall 704 are both disposed on a side away from the right angle of the first fixing wall 701 and the second fixing wall 702, and the first abutting wall 703 and the second abutting wall 704 are both bent toward the direction of the optical panel 50.

The fixing member 70 is installed in the second cavity structure 402, a part of the outer wall of the first cavity structure 401 abuts against the right angle between the first fixing wall 701 and the second fixing wall 702, the joint of the first fixing wall 701 and the first abutting wall 703 abuts against the inner side of the bottom of the second cavity structure 402, the ends of the first abutting wall 703 and the second abutting wall 704 both face the opening of the second cavity structure 402, the first abutting wall 703 abuts against the side wall of the optical plate 50, the second abutting wall 704 abuts against the front surface of the optical plate 50, the inner walls of the second abutting wall 704 and the second cavity structure 402 abut against the optical plate 50 along the thickness direction of the optical plate 50, and the edge of the inner wall is fastened inside the second cavity structure 402.

In other embodiments, the fixing member 70 may be a conventional snap structure, which clamps the edge of the optical plate member 50 inside the second cavity structure 402.

Referring to fig. 5 and 6, in an embodiment, the frame 40 is a square frame structure, the first cavity structure 401 continuously extends along the circumferential direction of the frame 40 to form a circumferentially-conducting annular cavity, and the second cavity structure 402 continuously extends along the circumferential direction of the frame 40 to form a circumferentially-conducting annular cavity.

Referring to fig. 7 and 8, in another embodiment, the frame 40 has a square frame structure, the frame 40 includes a pair of long frames 403 and a pair of short frames 404, the long frames 403 and the short frames 404 are opposite to each other, a joint between the long frames 403 and the short frames 404 is a circular chamfer 405, the pair of long frames 403 and the pair of short frames 404 are both provided with a first cavity structure 401 and a second cavity structure 402, and an inside of the circular chamfer 405 is arranged in a clearance manner.

Referring to fig. 1, in one embodiment, the optical plate 50 includes a grid plate 502 and a diffusion plate 501 stacked together, and the edges of the grid plate 502 and the diffusion plate 501 are both received and fixed inside the second cavity structure 402. Wherein, the diffusion plate 501 faces the inner side of the light exit 20a, and the grid plate 502 is disposed on the side of the diffusion plate 501 away from the light exit 20 a. That is, the diffusion plate 501 and the grille plate 502 are sequentially disposed along the direction from the inside to the outside of the light outlet 20a, and the lamp may be a grille lamp for teaching.

In one embodiment, the optical plate 50 includes a stacked micro-prism anti-glare plate and a diffusion plate 501, and edges of the micro-prism anti-glare plate and the diffusion plate 501 are both accommodated and fixed inside the second cavity structure 402. The diffusion plate 501 faces the inner side of the light exit 20a, and the microprism anti-glare plate is disposed on the side of the diffusion plate 501 away from the light exit 20 a. That is, along the direction from inside to outside of the light outlet 20a, the diffusion plate 501 and the micro-prism anti-glare plate are sequentially disposed, and at this time, the lamp may be a micro-prism anti-glare lamp for teaching.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. A lamp comprises a lampshade (20), a light source (30), a frame (40) and an optical plate (50), wherein the lampshade (20) is provided with a cover cavity and a light outlet (20a) communicated with the cover cavity, and the light source (30) is arranged in the cover cavity; the method is characterized in that:

the frame (40) is of an integrated structure, and the frame (40) is provided with a first cavity structure (401) and a second cavity structure (402) which are arranged at intervals; the orifice of the first cavity structure (401) is open towards the lampshade (20), and the edge of the lampshade (20) is accommodated and fixed in the first cavity structure (401); the opening of the second cavity structure (402) is arranged to be open towards the optical plate (50), and the edge of the optical plate (50) is accommodated and fixed in the second cavity structure (402); the optical plate (50) covers the light outlet (20a), and at least part of light rays of the light source (30) are emitted out of the cover cavity by transmitting the optical plate (50).

2. The luminaire of claim 1, wherein:

the edge of the lampshade (20) is provided with a bending structure (202) which is bent towards the frame (40), and the edge of the lampshade (20) is provided with a connecting hole structure (201 a);

the first cavity structure (401) comprises a first accommodating cavity (401a) and a second accommodating cavity (401b) which are arranged at intervals, the openings of the first accommodating cavity (401a) and the second accommodating cavity (401b) are both arranged towards the opening of the lampshade (20), the bending structure (202) is accommodated in the first accommodating cavity (401a), the connecting hole structure (201a) is used for penetrating through a partial structure of the connecting piece (60), and the second accommodating cavity (401b) is used for accommodating the other partial structure of the connecting piece (60).

3. The luminaire of claim 2, wherein:

the lamp further comprises the connecting piece (60), part of the connecting piece (60) penetrates through the connecting hole structure (201a), the other part of the connecting piece (60) is accommodated in the second accommodating cavity (401b) in an interference fit mode, and the lampshade (20) and the frame (40) are fixed to each other through the connecting piece (60).

4. The luminaire of claim 2, wherein:

the first cavity structure (401) and the second cavity structure (402) are sequentially arranged along the thickness direction of the optical plate (50); the first accommodating cavity (401a) and the second accommodating cavity (401b) are sequentially arranged along the plate surface direction of the optical plate (50).

5. The luminaire of claim 4, wherein:

the edge of the lampshade (20) comprises a straight structure (201) and a bent structure (202), the straight structure (201) extends outwards from the edge of the light outlet (20a), and the straight structure (201) and the light outlet (20a) are arranged in a flush manner; the bending structure (202) is bent towards the frame (40) from one side of the straight structure (201) departing from the light outlet (20a), and the connecting hole structure (201a) is arranged on the straight structure (201).

6. The luminaire of claim 4 or 5, wherein:

along the face direction of optical plate (50), the size of first holding chamber (401a) is greater than the size of second holding chamber (401b), structure (202) and first holding chamber (401a) both clearance fit buckle.

7. The luminaire of claim 4, wherein:

-the dimension of the second cavity structure (402) is larger than the thickness dimension of the optical plate (50) in the thickness direction of the optical plate (50); the lamp further comprises a fixing piece (70), and the edge of the optical plate piece (50) is clamped in the second cavity structure (402) through the fixing piece (70).

8. A luminaire as claimed in claim 1 or 2, characterized in that:

the frame (40) is of a square frame structure, the first cavity structure (401) extends continuously along the circumferential direction of the frame (40) to form a circumferentially-conducted annular cavity, and the second cavity structure (402) extends continuously along the circumferential direction of the frame (40) to form a circumferentially-conducted annular cavity.

9. A luminaire as claimed in claim 1 or 2, characterized in that:

the frame (40) is square frame structure, the frame (40) is including a pair of long frame (403) and a pair of short frame (404) of relative setting that set up, long frame (403) with the junction of short frame (404) is circular chamfer (405) setting, and is a pair of long frame (403) and a pair of short frame (404) all are equipped with first cavity structure (401) with second cavity structure (402), just the setting of keeping away the sky in the inside of circular chamfer (405).

10. The luminaire of claim 4 or 7, wherein:

the optical plate (50) comprises a grid plate (502) and a diffusion plate (501) which are arranged in a stacked mode;

alternatively, the optical plate (50) comprises a microprism anti-glare plate and a diffusion plate (501) which are arranged in a stacked manner.

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