CN211554569U - Backlight module and transparent display device - Google Patents
Backlight module and transparent display device Download PDFInfo
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- CN211554569U CN211554569U CN201922450157.5U CN201922450157U CN211554569U CN 211554569 U CN211554569 U CN 211554569U CN 201922450157 U CN201922450157 U CN 201922450157U CN 211554569 U CN211554569 U CN 211554569U
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- 238000005516 engineering process Methods 0.000 description 5
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- 239000000463 material Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
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Abstract
The utility model relates to the technical field of transparent display, and discloses a backlight module and a transparent display device, wherein the backlight module comprises a back plate, a light guide plate and a backlight source, the back plate comprises a plurality of opening areas which are arranged at intervals, and a connecting part is formed between the adjacent opening areas; the light guide plate comprises a plurality of sub light guide plates, the sub light guide plates are positioned above the connecting parts and are arranged corresponding to the connecting parts, and the sub light guide plates are at least provided with first light inlet parts; the backlight source comprises a plurality of sub light sources, and light emitting surfaces of the sub light sources are respectively arranged corresponding to the light incident surfaces of the first light incident parts of the sub light guide plates; the opening area forms a transmission area of the backlight module, and the connecting part forms a shading area of the backlight module. The utility model discloses a transparent display device has used as above backlight unit, can realize transparent demonstration and normal demonstration simultaneously, application scope is great, has higher practicality.
Description
Technical Field
The utility model relates to a transparent display technology field, in particular to backlight module and transparent display device.
Background
Most of the existing display devices are backlight liquid crystal display devices, which include a liquid crystal display panel and a backlight module. Since the lcd panel does not emit light, the backlight module is one of the key components of the lcd device because the backlight module needs to provide a light source to normally display images.
Fig. 1 is an exploded view of a display device disclosed in the prior art. As shown in fig. 1, a conventional display device 1 includes a liquid crystal display panel 2 and a backlight module 3. The backlight module 3 includes a back plate 31, a reflective sheet 32, a light guide plate 33, and an optical film assembly 34 from bottom to top. The liquid crystal display panel 2 is located above the backlight module 3.
However, with the development of display technology, various new technologies are emerging, and transparent display technology is receiving more and more attention. The transparent display generally refers to a display device that can form a transparent display state so that an image displayed in the display device and a scene behind the display device can be seen by a viewer. Transparent display devices have many possible applications, such as windows in buildings or automobiles and display windows in shopping malls. In addition to the applications of these large devices, small devices such as handheld tablet computers may also benefit from a transparent display, for example, enabling a user to view a map and to view a scene in front through the screen.
In the conventional backlight module, the opaque or scattering properties of the back plate, the reflective sheet and the light guide plate cannot realize transparent display, so that a new backlight module capable of realizing transparent display is needed.
In view of the above, the applicant of the present invention has made extensive and intensive studies and researches on various defects and inconveniences caused by the perfection of the backlight module and the display device.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to disclose a backlight module and transparent display device, the utility model discloses aim at solving among the prior art backlight module and display device and can't realize transparent display scheduling problem.
In order to solve the technical problem, the utility model discloses a solution is: the backlight module comprises a back plate, a light guide plate and a backlight source, wherein the back plate comprises a plurality of opening areas arranged at intervals, and a connecting part is formed between every two adjacent opening areas; the light guide plate comprises a plurality of sub light guide plates, the sub light guide plates are positioned above the connecting parts and are arranged corresponding to the connecting parts, and the sub light guide plates at least comprise first light inlet parts; the backlight source comprises a plurality of sub light sources, and light emitting surfaces of the sub light sources are respectively arranged corresponding to the light incident surfaces of the first light incident parts of the sub light guide plates; the opening area forms a transmission area of the backlight module, and the connecting part forms a shading area of the backlight module.
Preferably, the opening area of the back plate is filled with a transparent sealing member having the same thickness as the connecting portion.
Preferably, the backlight module further comprises a plurality of reflective sheets, and the reflective sheets are located between the connecting portion and the sub light guide plate.
Preferably, the backlight module further comprises an optical film set located above the light guide plate and covering the opening area and the sub-light guide plate.
Preferably, the area of the light incident surface of the first light incident part is greater than or equal to the area of the light emergent surface of the sub-light source.
Preferably, the sub light guide plate further includes a body connected to the first light incident portion, the body is located above the connecting portion and disposed corresponding to the connecting portion, and a width of the light incident surface of the first light incident portion is greater than a width of the body.
Preferably, the sub-light guide plate is further provided with a second light incident portion connected with the main body and arranged opposite to the first light incident portion, and the backlight sources are respectively arranged on two sides of the light guide plate; the light emitting surfaces of the sub light sources are respectively arranged corresponding to the light incident surface of the first light incident part and the light incident surface of the second light incident part of the sub light guide plates.
Preferably, the width of the light incident surface of the second light incident part is greater than the width of the body.
Preferably, the back plate comprises a bottom plate and four side plates surrounding the bottom plate, and the opening area and the connecting part are both arranged on the bottom plate.
The utility model also discloses a transparent display device, which comprises a backlight module and a liquid crystal display panel arranged above the backlight module, wherein the backlight module is the backlight module; the transmission area of the backlight module corresponds to the transparent display area of the transparent display device, and the shading area of the backlight module corresponds to the normal display area of the transparent display device.
The utility model discloses a backlight unit and transparent display device is through setting up a plurality of opening district on the backplate to set up a plurality of sub-light guide plates respectively on the connecting portion of connecting adjacent opening district, form the open region on backlight unit and hide the light zone territory, form transparent display area territory and normal display area territory on transparent display device correspondingly, can realize transparent demonstration and normal demonstration simultaneously, application scope is great, has higher practicality.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:
fig. 1 is an exploded view of a display device disclosed in the prior art;
fig. 2 is a top view of a back plate in a backlight module according to an embodiment of the present invention;
fig. 3 is a general top view of a backlight module according to an embodiment of the present invention;
fig. 4 is a partial perspective view of a backlight module according to an embodiment of the present invention;
fig. 5 is a top view of a back plate in the backlight module according to the second embodiment of the present invention;
fig. 6 is an overall plan view of a backlight module according to a second embodiment of the present invention;
fig. 7 is an exploded schematic view of a transparent display device according to a third embodiment of the present invention;
wherein: 1. 100, and (2) a step of: a backlight module; 2: a liquid crystal display panel; 3. 300, and (2) 300: a backlight module; 31. 310, 310': a back plate; 311. 311': a base plate; 312: a side plate; 313. 313': an open area; 314. 314': a connecting portion; 32. 320, and (3) respectively: a reflective sheet; 33. 330, 330': a light guide plate; 331. 331': a sub light guide plate; 332. 332': a body; 333. 333': a first light incident portion; 334. 334': a second light incident portion; 34: an optical film set; 350. 350': a backlight source; 351. 351': and a sub-light source.
Detailed Description
In order to further explain the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, but not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example one
Fig. 2 is a top view of a back plate in a backlight module according to an embodiment of the present invention; fig. 3 is a general top view of a backlight module according to an embodiment of the present invention; fig. 4 is a partial perspective view of a backlight module according to an embodiment of the present invention.
As shown in fig. 2 to 4, the present embodiment discloses a backlight module 100, which includes a back plate 310, a light guide plate 330 disposed above the back plate 310, and a backlight 350 disposed on at least one side of the light guide plate 330.
In this embodiment, the back plate 310 includes a bottom plate 311 and four side plates 312 surrounding the bottom plate 311, and a receiving area is formed by the bottom plate 311 and the four side plates 312, and the receiving area is used for placing the backlight 350 and the light guide plate 330. The bottom plate 311 further includes a plurality of opening areas 313 arranged at intervals, a connection portion 314 is formed between two adjacent opening areas 313, and the opening areas 313 and the connection portion 314 extend along the width direction of the bottom plate 311. The opening 313 is light transmissive and corresponds to a transmissive area of the backlight module 100, and the connecting portion is light-blocking and corresponds to a light-blocking area of the backlight module 100. The back plate 310 is integrally formed into a structure similar to a blind, the overall strength of the back plate 310 is not affected, and due to the limited resolution of human eyes, when the distance reaches a certain requirement, the back plate 310 does not affect the observation of objects behind, and the transparent display technology can be realized by using the backlight module 100.
In the embodiment, the light guide plate 330 includes a plurality of sub light guide plates 331, and the sub light guide plates 331 are located above the connection portions 314 and are disposed corresponding to the connection portions 314. The sub light guide plate 331 includes a body 332 and a first light incident part 333 connected to the body 332; the body 332 is disposed above the connection portion 314 and corresponds to the connection portion 314.
Specifically, the width of the main body 332 of the sub light guide plate 331 is equal to the width of the connection portion 314, so that the sub light guide plate 331 is prevented from affecting the transmission effect of the transmission area of the backlight module 100.
In this embodiment, the backlight 350 includes a plurality of sub light sources 351, and light emitting surfaces of the sub light sources 351 are respectively disposed corresponding to the light incident surfaces of the first light incident parts 333 of the sub light guide plates 331.
Specifically, the width of the light incident surface of the first light incident part 333 is greater than the width of the main body 332, and the area of the light incident surface of the first light incident part 333 is the same as the area of the light emitting surface of the sub-light source 351. In this embodiment, the first light incident portion 333 of the sub light guide plate 331 is in a bell mouth shape, and the light incident surface of the first light incident portion 333 completely covers the light emitting surface of the sub light source 351, so that the sub light guide plate 331 and the sub light source 351 are better matched, and the light emitted by the sub light source 351 can be completely guided into the sub light guide plate 331. In other embodiments, on the premise of not affecting the transparency effect of the transmission region of the backlight module, the area of the light incident surface of the first light incident portion 333 may be increased, so that the area of the light incident surface of the first light incident portion 333 is larger than the area of the light emitting surface of the sub-light source 351, and the light incident surface of the first light incident portion 333 completely wraps the light emitting surface of the sub-light source 351, thereby further improving the utilization rate of the sub-light source by the sub-light guide plate, which is not limited herein.
In addition, the sub light guide plate 331 may be made of resin materials commonly used for manufacturing light guide plates, such as PMMA (polymethyl methacrylate), PC (polycarbonate), and the like, and a plurality of dots are further disposed on the sub light guide plate 331, so that the brightness and uniformity of the sub light source 351 can be controlled by adjusting the size and density of the dots.
In the present embodiment, the opening region 313 of the back plate 310 is filled with a transparent sealing member, specifically, the transparent sealing member is transparent glass, and the thickness of the transparent glass is the same as that of the connection portion 312. The bottom plate of the back plate 310 forms a closed space to prevent the entry of foreign matters and the like, and the light transmittance of the backlight module is not affected. In other embodiments, the transparent sealing element may also be made of other transparent materials such as transparent acrylic material, which is not limited herein.
In this embodiment, the backlight module 100 further includes a plurality of reflective sheets 320, and the reflective sheets 320 are located between the connection portion 312 and the sub light guide plate 331. Specifically, the width of the reflective sheet 320 is the same as that of the body 332 of the sub light guide plate 331, and the length of the reflective sheet 320 is the same as that of the opening region 313 of the back plate 310. The reflection sheet 320 may further improve the utilization rate of the sub light guide plate to the sub light source. In other embodiments, a reflective material may be further coated on the surface of the connecting portion of the back plate, so that the utilization rate of the sub light guide plate for the sub light source may also be improved without providing a reflective sheet, which is not limited herein.
In this embodiment, the backlight module 100 further includes an optical film group 34, and the optical film group 34 includes a combination of various optical films such as a brightness enhancement film, a diffusion film, a prism film, or a micro-lens film. The optical film set 34 is disposed above the light guide plate 330 and covers the plurality of opening regions 313 and the plurality of sub light guide plates 331, so as to convert the linear light emitted from the light guide plate 330 into uniform surface light.
In the backlight module disclosed in this embodiment, the plurality of opening areas are disposed on the back plate, and the plurality of sub light guide plates are respectively disposed on the connecting portions connecting the adjacent opening areas, so that the opening area and the light shielding area are formed on the backlight module. On one hand, an external light source directly irradiates the liquid crystal display panel above the backlight module through the opening area to form a transparent display area; on the other hand, among the light rays emitted by the plurality of sub light sources of the backlight source and guided into the main body of the sub light guide plate through the first light inlet part of the sub light guide plate, the light rays irradiated to the reflector plate are totally reflected by the reflector plate and then guided into the main body of the sub light guide plate and guided out, so that a normal display area is formed.
Further, in the present embodiment, a light sensor (not shown) is disposed outside the backlight module 100, and a backlight driving unit connected to the backlight 350 is disposed inside the backlight module 100. The light sensor is connected with the backlight driving unit and controls the backlight driving unit.
Specifically, the external light sensor receives the brightness of the ambient light and sends the brightness to the backlight driving unit, and the backlight driving unit automatically adjusts the brightness of the backlight 350, so that different brightness displays of the backlight 350 can be realized in different environments, and convenience of user interaction is further improved.
Therefore, the backlight module disclosed by the embodiment provides a display light source for the display area of the liquid crystal display panel through the shading area on the premise of not influencing the light transmission of the opening area; the transparent display and the normal display can be realized simultaneously, the application range is wide, and the practicability is high.
Second embodiment
Fig. 5 is a top view of a back plate in the backlight module according to the second embodiment of the present invention; fig. 6 is an overall top view of the backlight module according to the second embodiment of the present invention.
As shown in fig. 5 to 6, the structure difference between the present embodiment and the first embodiment is: the opening 313 ' and the connecting portion 314 ' of the back plate 310 ' of the present embodiment extend along the length direction of the bottom plate 311 ', and the sub light guide plate 331 ' of the light guide plate 330 ' is further disposed at the second light incident portion 334 ' on the side of the body 332 ' far away from the first light incident portion 333 '.
In this embodiment, the light emitting surfaces of the plurality of sub light sources 351 ' of the backlight 350 ' are respectively disposed corresponding to the light incident surface of the first light incident portion 333 ' and the light incident surface of the second light incident portion 334 ' of the sub light guide plate 331 ', so as to realize simultaneous light emission on both sides of the light guide plate, thereby further improving the normal display effect of the light shielding region.
Specifically, the width of the light incident surface of the second light incident portion 334 'is also greater than the width of the main body 332', so that both ends of the sub light guide plate 331 'are in a bell mouth shape, and the light emitting rate of the sub light source 351' is effectively improved.
Compared with the backlight module disclosed in the first embodiment, the backlight module disclosed in the present embodiment further improves the normal display effect of the shading area, and does not affect the transparent display effect. When the backlight module is used in a dark environment, the backlight module can be used for providing backlight for the display area of the liquid crystal display panel, the transparency of the opening area cannot be influenced, and the application range of transparent display is enlarged.
Third embodiment
Fig. 7 is an exploded schematic view of a transparent display device according to a third embodiment of the present invention.
As shown in fig. 7, the present embodiment further discloses a transparent display device 100, which includes the backlight module 300 described in the first embodiment, and a liquid crystal display panel 2 disposed above the backlight module 300.
The backlight module 100 includes a back plate 310, a reflective sheet 320, a light guide plate 330 and an optical film set 34 disposed above the back plate 310, and a backlight source disposed on at least one side of the light guide plate 330.
Wherein the opening area 313 of the backlight module 300 corresponds to the transmission area of the backlight module 300, and the transmission area of the backlight module 300 corresponds to the transparent display area of the transparent display device 100; the connecting portion 314 of the backlight module 300 corresponds to a light-shielding area of the backlight module 300, and the light-shielding area of the backlight module 300 corresponds to a normal display area of the transparent display apparatus 100.
The utility model discloses a transparent display device has used as above backlight unit, can realize transparent demonstration and normal demonstration simultaneously, application scope is great, has higher practicality.
The foregoing is a complete disclosure of the present invention, and in this specification, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including other elements not expressly listed, in addition to those elements listed. In the present specification, the terms of front, rear, upper, lower and the like are defined by the positions of the components in the drawings and the positions of the components relative to each other, and are only used for the sake of clarity and convenience in technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. The utility model provides a backlight module, includes backplate, light guide plate and backlight, its characterized in that: the back plate comprises a plurality of opening areas arranged at intervals, and a connecting part is formed between every two adjacent opening areas; the light guide plate comprises a plurality of sub light guide plates, the sub light guide plates are positioned above the connecting parts and are arranged corresponding to the connecting parts, and the sub light guide plates at least comprise first light inlet parts; the backlight source comprises a plurality of sub light sources, and light emitting surfaces of the sub light sources are respectively arranged corresponding to the light incident surfaces of the first light incident parts of the sub light guide plates;
the opening area forms a transmission area of the backlight module, and the connecting part forms a shading area of the backlight module.
2. The backlight module of claim 1, wherein: the opening area of the back plate is filled with a transparent sealing member having the same thickness as the connecting portion.
3. The backlight module of claim 1, wherein: the backlight module further comprises a plurality of reflection sheets, and the reflection sheets are located between the connecting portion and the sub light guide plate.
4. The backlight module of claim 1, wherein: the light guide plate is arranged above the light guide plate, and the opening area and the sub light guide plate are covered by the optical film group.
5. The backlight module of claim 1, wherein: the area of the light incident surface of the first light incident part is larger than or equal to the area of the light emergent surface of the sub-light source.
6. The backlight module of claim 5, wherein: the sub light guide plate further comprises a body connected with the first light incident part, the body is located above the connecting part and corresponds to the connecting part, and the width of the light incident surface of the first light incident part is larger than that of the body.
7. The backlight module of claim 6, wherein: the sub light guide plate is also provided with a second light incoming part which is connected with the body and is opposite to the first light incoming part, and the backlight sources are respectively arranged at two sides of the light guide plate; the light emitting surfaces of the sub light sources are respectively arranged corresponding to the light incident surface of the first light incident part and the light incident surface of the second light incident part of the sub light guide plates.
8. The backlight module of claim 7, wherein: the width of the light incident surface of the second light incident part is larger than that of the body.
9. The backlight module of claim 1, wherein: the back plate comprises a bottom plate and four side plates arranged on the bottom plate in a surrounding mode, and the opening area and the connecting portion are arranged on the bottom plate.
10. The utility model provides a transparent display device, includes backlight unit and sets up the liquid crystal display panel of backlight unit's top which characterized in that: the backlight module is as claimed in any one of claims 1-9;
the transmission area of the backlight module corresponds to the transparent display area of the transparent display device, and the shading area of the backlight module corresponds to the normal display area of the transparent display device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922450157.5U CN211554569U (en) | 2019-12-30 | 2019-12-30 | Backlight module and transparent display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922450157.5U CN211554569U (en) | 2019-12-30 | 2019-12-30 | Backlight module and transparent display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211554569U true CN211554569U (en) | 2020-09-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922450157.5U Active CN211554569U (en) | 2019-12-30 | 2019-12-30 | Backlight module and transparent display device |
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| Country | Link |
|---|---|
| CN (1) | CN211554569U (en) |
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2019
- 2019-12-30 CN CN201922450157.5U patent/CN211554569U/en active Active
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