CN216979345U

CN216979345U - Light guide plate and display module

Info

Publication number: CN216979345U
Application number: CN202122794158.9U
Authority: CN
Inventors: 黄皓; 袁海江
Original assignee: HKC Co Ltd; Chongqing HKC Optoelectronics Technology Co Ltd
Current assignee: HKC Co Ltd; Chongqing HKC Optoelectronics Technology Co Ltd
Priority date: 2021-11-15
Filing date: 2021-11-15
Publication date: 2022-07-15
Anticipated expiration: 2031-11-15

Abstract

The application relates to the field of liquid crystal display equipment, and provides a light guide plate which comprises an assembly groove formed in a first end face of the light guide plate; the assembling groove is used for installing the optical diaphragm; the depth of the assembling groove is larger than the thickness of the optical diaphragm; the light guide plate provided by the application is provided with an assembly groove for installing an optical diaphragm, wherein the optical diaphragm is installed in the assembly groove; the height of the side wall of the mounting groove is greater than the thickness of the optical film, so that the OC can be spaced from the optical film by a proper distance; the module display adopting the light guide plate does not need to adopt a rubber frame in the production process, so that the cost is reduced, and the production efficiency is improved because the assembly process of the light guide plate and the rubber frame is eliminated; especially in the production of an automatic line, the good product rate of products is effectively improved due to the removal of the assembly process of the light guide plate and the rubber frame.

Description

Light guide plate and display module

Technical Field

The application relates to the field of liquid crystal display equipment, in particular to a light guide plate and a display module.

Background

At present, most display modules are produced by adopting an automatic line; in the prior art, a frame of a module mainly includes a back plate, a rubber frame, an optical film, a lamp frame, a light source and other components; in the production of an automatic line, due to the characteristics of the rubber frame, the assembly of the light guide plate and the rubber frame is a difficult process step, and the condition of incomplete assembly often occurs in actual production, so that the yield of products is seriously influenced.

SUMMERY OF THE UTILITY MODEL

The application provides a light guide plate and backlight unit is used for placing the assembly groove of optics diaphragm through setting up on the light guide plate to solve the light guide plate among the prior art and glue the problem that the frame equipment difficulty influences the yields of module display.

The application provides a light guide plate, which is characterized in that the light guide plate comprises an assembly groove arranged on a first end face of the light guide plate; the assembling groove is used for installing the optical diaphragm; the depth of the assembling groove is larger than the thickness of the optical diaphragm.

Preferably, the light guide plate includes a first sidewall and a second sidewall, and the first sidewall and the second sidewall are respectively disposed at opposite two side positions of the assembly groove.

Preferably, the light guide plate includes a first sidewall, a second sidewall, a third sidewall and a fourth sidewall, and the assembly groove is a groove structure surrounded by the first sidewall, the second sidewall, the third sidewall and the fourth sidewall.

Preferably, a clamping groove is formed in the side wall of the light guide plate, opposite to the optical diaphragm.

Preferably, 3 clamping grooves are arranged, wherein a plurality of clamping grooves are formed in the second side wall;

preferably, 2 clamping grooves are formed in the first side wall; the clamping groove formed in the second side wall is located on the first axis; two of the clamping grooves arranged on the first side wall are symmetrically distributed relative to the first axis.

Preferably, the clamping groove is internally provided with a glue fixing piece.

Preferably, the light guide plate comprises a second end face, and the second end face is arranged opposite to the first end face; a plurality of convex blocks are arranged on the second end face; the lug and the light guide plate are integrally formed.

A display module, comprising:

a liquid crystal panel, an optical film, a reflector, a light source,

The light guide plate; the optical film is arranged on the light guide plate; and the number of the first and second groups,

the liquid crystal display panel, the reflector plate, the light source and the light guide plate are all arranged on the back plate, and the light guide plate comprises a second end face on which a plurality of bumps are arranged; the back plate is provided with a plurality of assembling holes corresponding to the plurality of bumps; the first end of the lug extends to the outside of the back plate through the assembly hole.

Preferably, the optical film is fixed in the mounting groove by a first adhesive member.

Preferably, the side edge of the liquid crystal panel is fixed on the back plate through a second adhesive piece; the bottom surface of the liquid crystal panel is fixed on the upper end surface of the light guide plate through a third adhesive piece.

Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:

the light guide plate provided by the application is provided with an assembly groove for installing an optical diaphragm, wherein the optical diaphragm is installed in the assembly groove; the height of the side wall of the mounting groove is greater than the thickness of the optical film, so that the OC can be spaced from the optical film by a proper distance; the module display adopting the light guide plate does not need to adopt a rubber frame in the production process, so that the cost is reduced, and the production efficiency is improved because the assembly process of the light guide plate and the rubber frame is eliminated; especially in the production of an automatic line, the good product rate of products is effectively improved due to the removal of the assembly process of the light guide plate and the rubber frame.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and, together with the description, serve to explain the principles of the application.

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

Fig. 1 is a cross-sectional view of a display module according to an embodiment of the present disclosure;

fig. 2 is a schematic view of a first structure of a light guide plate according to an embodiment of the present disclosure;

fig. 3 is a second schematic structural view of a light guide plate according to an embodiment of the present disclosure;

fig. 4 is a schematic view of a third structure of a light guide plate according to an embodiment of the present application;

fig. 5 is a fourth schematic structural view of a light guide plate according to an embodiment of the present disclosure;

fig. 6 is a schematic view illustrating an assembly structure of a light guide plate and a back plate according to a second embodiment of the present application;

fig. 7 is a side view structural diagram of a light guide plate according to a second embodiment of the present application.

Fig. 8 is a schematic bottom view of a light guide plate according to a second embodiment of the present application;

fig. 9 is a flowchart of an assembly process of a display module according to a third embodiment of the present application.

Description of the drawings: 1. a back plate; 11. an assembly hole; 12. an installation space; 13. a support portion; 2. a light guide plate; 21. Assembling a groove; 211. a side wall; 2111. a first side wall; 2112. a second side wall; 2113. a third side wall; 2114. a fourth side wall; 22. a card slot; 23. gluing and fixing the parts; 24. a bump; 3. a liquid crystal panel; 4. an optical film; 5. A reflective sheet; 6. a light source; 7. a fixing member; 81. a first adhesive member; 82. a second adhesive member; 83. a third adhesive member; 9. a first axis.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the prior art, a framework of a module mainly comprises a back plate, a rubber frame, an optical film, a lamp frame, a light source and other components; the rubber frame plays a role in supporting the OC, and is used for limiting the OC and the optical diaphragm so as to keep the space between the OC and the optical diaphragm and prevent the OC from being extruded and deformed when the optical diaphragm expands with heat and contracts with cold. However, in the production process, the assembly of the rubber frame and the light guide plate is difficult, and if the automatic production line is adopted, the yield of the process of assembling the rubber frame and the light guide plate is low, so that the yield of the product of the whole production line is affected.

In order to solve the above technical problem, the present application provides a light guide plate, the light guide plate is provided with an assembly groove, the assembly groove is used for assembling the optical film, a height of a sidewall of the assembly groove is higher than a thickness of the optical film, and a proper distance is maintained between the optical film and the OC in a process of assembling a module display; the module display using the light guide plate does not need to use the rubber frame, so that the cost is reduced, and the production efficiency is improved because the assembly process of the light guide plate and the rubber frame is eliminated; especially in the production of an automatic line, the good product rate of products is effectively improved due to the removal of the assembly process of the light guide plate and the rubber frame.

Referring to fig. 1, the present application provides a light guide plate, the light guide plate 2 includes a fitting groove 21 opened at a first end surface thereof; the assembling groove 21 is used for installing the optical diaphragm 4; the depth of the assembling groove 21 is larger than the thickness of the optical diaphragm 4; a liquid crystal panel 3 in the module display is arranged on the upper end surface of the light guide plate 2; since the depth of the assembling groove 21 is larger than the thickness of the optical film 4, a proper interval is maintained between the liquid crystal panel 3 and the optical film 4; thereby avoiding the liquid crystal panel 3 from being deformed due to the extrusion of the optical diaphragm 4 when the optical diaphragm 4 expands with heat and contracts with cold. In order to achieve the above technical effects, it is preferable that the depth of the assembling groove 21 is greater than the thickness of the optical film 4 by 0.08-0.12 mm; more preferably, the height of the sidewall 211 is greater than the thickness of the optical film 4 by 0.1mm according to the maximum curvature of the optical film 4 after expansion and contraction.

In the module display, the light guide plate 2 is assembled on a back plate 1; in order to enable the light guide plate 2 to be closely assembled with the back plate 1 and simplify the assembly process of the light guide plate 2 and the back plate 1; the light guide plate 2 includes a second end face disposed opposite to the first end face; a plurality of bumps 24 are arranged on the second end face; the bumps 24 and the light guide plate 2 are integrally formed; the back plate 1 is provided with a plurality of assembling holes 11 corresponding to the plurality of bumps 24; the first end of the bump 24 extends to the outside of the back plate 2 through the assembly hole 11; when the light guide plate 2 is fixed, the part of the bump 24 protruding out of the back plate 2 is heated, the protruding part of the bump 24 is heated to collapse, and the collapsed part and the back plate 1 form a structural buckle. Further, the bump 24 and the light guide plate 2 are integrally formed by injection molding.

The first embodiment is as follows:

referring to fig. 2, in order to facilitate the optical film 4 to be mounted on the light guide plate 2, the mounting groove 21 is of a double-sided surrounding type, that is, the side wall 211 of the light guide plate 2 includes a first side wall 2111 and a second side wall 2112, and the first side wall 2111 and the second side wall 2112 are oppositely disposed at two sides of the mounting groove 21; preferably, when the optical film 4 is attached to the light guide plate 2, opposite side surfaces of the optical film 4 abut against the first side wall 2111 and the second side wall 2112, respectively; in a preferred embodiment, an adhesive tape 8 may be used to fix the optical film 4 to the light guide plate 2; in another preferred embodiment, the first side wall and the second side wall may be formed with a clamping groove (not shown), a clamping portion (not shown) is installed around the light source film 4 opposite to the clamping groove, and the clamping groove is used for clamping the optical film 4; in another preferred embodiment, an adhesive fixing portion (not shown) is installed in the slot, and an adhesive can be attached to the adhesive fixing portion, and the adhesive is used for connecting the light guide plate 2 and the optical film 4.

Referring to fig. 3, in order to stably mount the optical film 4 to the light guide plate 2, referring to fig. 3, the mounting groove 21 may also be a groove having a surrounding structure; the optical film 4 is embedded in the mounting groove 21.

Referring to fig. 4, the assembly groove 21 is a groove having a surrounding structure; the optical diaphragm 4 is embedded in the assembling groove 21; a clamping groove 22 is formed in the side wall 211 of the light guide plate 2 opposite to the optical diaphragm 4; the optical film 4 is installed in the assembling groove 21 through the clamping groove 22; the optical film 4 may be provided with a clamping position (not shown) opposite to the clamping groove 22; the optical film 4 is mounted in the mounting groove 21 through the clamping position and the clamping groove 22; the side walls of the fitting groove 21 include a first side wall 2111 and a second side wall 2112 which are oppositely arranged, and a third side wall 2113 and a fourth side wall 2114 which are oppositely arranged; the clamping groove 22 can be opened on one of the four side walls; the clamping groove 22 can also be formed on the side walls of the two opposite surfaces; the clamping grooves 22 can be formed in the four side walls;

further, the first side wall 2111 and the second side wall 2112 are provided with the locking slot 22, the second side wall 2112 is provided with one locking slot 22, and the first side wall 2111 is provided with two locking slots 22; the slot 22 opened on the second side wall 2112 is located on the first axis 9; the two clamping grooves 22 formed in the first side wall 2111 are symmetrically distributed relative to the first axis 9; the three clamping grooves 22 form an asymmetric structure, the clamping positions on the optical film 4 also need to be correspondingly set to be an asymmetric structure, and when the optical film 4 is assembled in the assembling groove 21, the asymmetric structure can prevent the optical film 4 from being reversely assembled.

Referring to fig. 4, a glue paste fixing position 23 is installed in the clamping groove 22; the glue paste fixing position 23 is used for conveniently attaching a glue paste, and the glue paste is used for connecting the light guide plate 2 and the optical diaphragm 4.

Further, the glue fixing position 23 and the light guide plate 2 are integrally formed.

The second embodiment:

referring to fig. 1 and 6 to 8, the module display sequentially includes a back plate 1, a reflective sheet 5, a light guide plate 2, an optical film 4, and a liquid crystal panel 3 along a thickness direction of the module display; the back plate 1 comprises an installation space 12, and the reflecting sheet 5, the light guide plate 2, the optical membrane 4 and the liquid crystal panel 3 are installed in the installation space 12; further, the reflective sheet 5 is located between the light guide plate 2 and the bottom surface of the installation space 12, the optical film 4 is installed in the installation groove 21 of the light guide plate 2, the liquid crystal panel 3 is installed on the upper end surface of the light guide plate 2, and a gap exists between the liquid crystal panel 3 and the optical film 4; a light source 6 is also arranged in the installation space 12; the periphery of the back plate 1 is also wrapped with a fixing piece 7, and the fixing piece 7 adopts a horse-drawn adhesive tape; further, referring to fig. 6 to 8, the light guide plate 2 includes a plurality of bumps 24 disposed on a second end surface thereof; the back plate 1 is provided with a plurality of assembling holes 11 corresponding to the bumps 24; the first end of the bump 24 extends to the outside of the back plate 2 through the assembly hole 11; and the protruding parts of the bumps 24 are heated and collapsed by heating the parts of the bumps 24 protruding out of the back plate 2, and the collapsed parts form structural buckles with the back plate 1, so that the light guide plate 2 is stably assembled on the back plate 1.

Preferably, referring to fig. 1, a support portion 13 protrudes from an inner wall of the installation space 12 of the back plate 2; the outer side surface of the light guide plate 2 abuts against the support part 13; the upper end face of the light guide plate 2 is flush with the upper end face of the supporting part 13; in one embodiment, the supporting portion 13 protrudes from an inner wall of one side of the installation space 12, one side wall of the light guide plate 2 abuts against the supporting portion 13, and the other opposite side wall of the light guide plate 2 abuts against the inner wall of the installation space 12; the light source 6 is mounted in a space defined by the bottom surface of the support portion 13, the bottom surface and the inner wall of the mounting space 12, and the side wall of the light guide plate 2.

The bottom surface of the liquid crystal panel 3 is fixed to the upper end surfaces of the light guide plate 2 and the supporting portion 13 by a third adhesive member 83; further, in order to make the assembly of the liquid crystal panel 3 more secure, the liquid crystal panel 3 is also fixed in the Z-axis direction, referring to fig. 1, the side edge of the liquid crystal panel 3 is fixed to the back plate 1 by a second adhesive member 82.

Example three:

referring to fig. 9, the present application also provides an assembling process of a module display, including the steps of:

B/C feeding, Light attaching, B/C adhesive tape (REF/LGP adhesive), REF assembling, LGP assembling, hot melting treatment, lower DF assembling, prism sheet assembling, upper DF assembling, LGP adhesive tape, OC assembling, fixing PCB, externally attaching adhesive tape, lighting inspection, packaging and warehousing;

further, the B/C feeding refers to back plate feeding;

the Light attachment is to mount the Light bar to the back panel.

The B/C adhesive tape is used for attaching a first adhesive piece to the back plate.

The REF assembly is to install a reflector 5 on the back plate; the reflector is fixed through a first adhesive piece.

The LGP assembly is to assemble the light guide plate 2 to the back plate 2, and the bumps 24 and the assembly holes 11 are installed in a one-to-one correspondence.

The hot melting treatment is to heat the protruding part of the bump 24 protruding out of the back plate 2 when the light guide plate 2 is fixed, the protruding part of the bump 24 is heated to collapse, and the collapsed part and the back plate 1 form a structural buckle.

The lower DF assembly refers to an assembly process of the lower diffusion membrane.

The prism sheet assembly refers to an assembly process of the prism film.

The upper DF assembly refers to an upper diffusion membrane assembly process.

The LGP pasting is to paste one surfaces of the second and third adhesive members to the light guide plate 2.

The OC assembly is to fix the liquid crystal panel to the upper end surface of the light guide plate 2 through the second adhesive.

The fixed PCB fixes the PCB board on the back plate 1.

The external adhesive plaster is formed by winding the adhesive tape on the outer side.

The lighting inspection is to test whether the module display works normally.

Further, the OC assembling step further includes:

and OC material loading, wherein the OC material loading refers to liquid crystal panel material loading.

And (3) tearing off the lower POL, wherein the lower POL tearing off refers to tearing off the lower polarizer of the liquid crystal panel.

Compared with the prior art, the assembly process of the module display eliminates the step of assembling the rubber frame, thereby improving the production efficiency; particularly in automatic line production, the removal of the rubber frame assembly step effectively improves the yield of products.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The previous description is only for the purpose of describing particular embodiments of the present application, and is provided to enable any person skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A light guide plate, install in the back light board of the back light module set, characterized by that, the said light guide plate (2) includes opening in its first end surface the assembly trough (21); the assembling groove (21) is used for installing the optical diaphragm (4); the depth of the assembly groove (21) is greater than the thickness of the optical film (4).

2. The light guide plate according to claim 1, wherein the light guide plate (2) includes a first sidewall (2111) and a second sidewall (2112), the first sidewall (2111) and the second sidewall (2112) being disposed at opposite side positions of the fitting groove (21), respectively.

3. The light guide plate according to claim 1, wherein the light guide plate (2) comprises a first sidewall (2111), a second sidewall (2112), a third sidewall (2113), and a fourth sidewall (2114); the assembling groove (21) is a groove body structure enclosed by a first side wall (2111), a second side wall (2112), a third side wall (2113) and a fourth side wall (2114).

4. The light guide plate according to claim 3, wherein the side wall (211) of the light guide plate (2) is provided with a clamping groove (22) opposite to the optical film (4).

5. The light guide plate according to claim 4, wherein a plurality of the card slots (22) are provided; the second side wall (2112) is provided with 1 clamping groove (22), and the first side wall (2111) is provided with 2 clamping grooves (22); the clamping groove (22) formed in the second side wall (2112) is located on the first axis (9); the two clamping grooves (22) formed in the first side wall (2111) are symmetrically distributed relative to the first axis (9).

6. The light guide plate according to claim 5, wherein the slot (22) is mounted with a mount (23).

7. The light guide plate according to any one of claims 1 to 6, wherein the light guide plate (2) comprises a second end face disposed opposite to the first end face; a plurality of lugs (24) are arranged on the second end face; the bump (24) and the light guide plate (2) are integrally formed.

8. A display module, comprising:

a liquid crystal panel (3), an optical film (4), a reflector (5), a light source (6),

The light guide plate of any one of claims 1-7; the optical film (4) is mounted on the light guide plate (2); and the number of the first and second groups,

the liquid crystal display panel comprises a back plate (1), wherein the liquid crystal panel (3), a reflector plate (5), a light source (6) and a light guide plate (2) are all arranged on the back plate (1), and the light guide plate (2) comprises a second end face provided with a plurality of bumps (24); the back plate (1) is provided with a plurality of assembling holes (11) corresponding to the bumps (24); the first end of the lug (24) passes through the assembly hole (11) and extends to the outside of the back plate (1).

9. The display module according to claim 8, wherein the optical film (4) is fixed in the mounting groove (21) by a first adhesive member (81).

10. A display module according to claim 8, wherein the side edges of the liquid crystal panel (3) are fixed to the back plate (1) by a second adhesive member (82); the bottom surface of the liquid crystal panel (3) is fixed on the upper end surface of the light guide plate (2) through a third adhesive piece (83).