Side-entry backlight module and display device

Abstract

The embodiment of the utility model provides a side-in type backlight module and a display device. The side-in type backlight module comprises a light-transmitting plate body, a light source and an optical film assembly, the light-transmitting plate body comprises a bottom plate, the bottom plate is provided with an upper surface and a lower surface which are oppositely arranged, the upper surface is provided with a first groove, the light source is arranged on the side edge of the bottom plate, and the optical film assembly is arranged in the first groove. According to the side-in type backlight module, the light-transmitting plate body serves as the back plate and the light guide plate at the same time, on the one hand, the light-transmitting plate body has good light-transmitting performance and can play a role of the light guide plate, and a point light source on the side edge is converted into an area light source, and on the other hand, the first groove is formed in the upper surface of the light-transmitting plate body, so that the light-transmitting plate body has good light-transmitting performance and can play a role of the light guide plate. According to the side-in type backlight module, the first groove is formed in the side-in type backlight module, the optical film assembly is arranged in the first groove, so that the function of a back plate can be achieved, compared with a traditional side-in type backlight module, the thickness of the side-in type backlight module can be greatly reduced, and therefore the requirement of consumers for the light and thin design of the display device is met.

Description

Technical Field

[0001] The present application relates to the field of displays, and particularly to a side-injection backlight module and a display device. Background Art

[0002] With the evolution of optoelectronic and semiconductor technologies, it has also driven the booming development of flat panel displays (FPDs). Among various flat panel displays, liquid crystal displays (LCDs) have been applied in all aspects of production and life due to many excellent characteristics such as high space utilization efficiency, low power consumption, no radiation, and low electromagnetic interference.

[0003] A liquid crystal display is usually a backlight type liquid crystal display, which includes a liquid crystal panel and a backlight module arranged opposite to each other. The working principle of the liquid crystal panel is to place liquid crystal molecules between two parallel glass substrates (i.e., the color filter substrate (CF substrate) and the array substrate (Array substrate) of the cell). The two glass substrates control the change of the direction of the liquid crystal molecules by applying or not applying electricity to the liquid crystal molecules, so as to refract the light of the backlight module to generate an image.

[0004] The backlight module is generally divided into a side-injection backlight module and a direct-lit backlight module. Among them, the light source of the side-injection backlight module is generally arranged on the side of the backlight module, and the light source is converted into a surface light source through a light guide plate. Since the display using the side-injection backlight module is thinner and more beautiful in appearance, the side-injection backlight module is widely used in display devices such as displays and televisions. However, due to the increasing demand of consumers for thinner and lighter display devices, the thickness of the existing side-injection backlight module still cannot meet the requirements of the thinner and lighter design of display devices. Summary of the Utility Model

[0005] Based on this, the embodiments of the present application provide a side-injection backlight module and a display device.

[0006] In a first aspect, the embodiments of the present application provide a side-injection backlight module, including:

[0007] A light-transmitting plate body, the light-transmitting plate body includes a bottom plate, the bottom plate has an upper surface and a lower surface arranged opposite to each other, and a first groove is provided on the upper surface;

[0008] A light source, arranged on the side of the bottom plate;

[0009] An optical film assembly, arranged in the first groove.

[0010] In some embodiments, a second groove is provided on the side of the bottom plate, and at least a part of the light source is accommodated in the second groove.

[0011] In some embodiments, a reflective layer is disposed on the lower surface of the bottom plate and on the side surface of the bottom plate in an area not corresponding to the light source.

[0012] In some embodiments, the light-transmitting plate body further includes a side plate, the side plate is connected to the bottom plate, the side plate and the bottom plate together enclose a containing space, and the containing space can be used to accommodate a display panel.

[0013] In some embodiments, a reflective layer is provided on the outer surface of the side panel.

[0014] In some embodiments, the edge-type backlight module further includes a connecting member, and both the light source and the light-transmitting plate body are connected to the connecting member to achieve a fixed connection between the light source and the light-transmitting plate body.

[0015] In some embodiments, the connector includes a first connecting portion and a second connecting portion connected to each other, the first connecting portion connecting the light source, a side of the bottom plate and a side of the side plate, and the second connecting portion connecting a side of the side plate facing away from the bottom plate.

[0016] In some embodiments, a third groove is disposed on the upper surface of the bottom plate in a peripheral area of ​​the first groove, and the third groove can be filled with glue to bond the display panel.

[0017] In some embodiments, the light-transmitting plate is made of glass; and / or

[0018] The light-transmitting plate body is an integrated structure.

[0019] In a second aspect, an embodiment of the present application provides a display device, comprising the edge-type backlight module as described above.

[0020] The edge-entry backlight module provided in the embodiment of the present application adopts a light-transmitting plate body that simultaneously serves as a back plate and a light guide plate. On the one hand, the light-transmitting plate body has good light-transmitting performance and can serve as a light guide plate to convert the point light source on the side into a surface light source. On the other hand, a first groove is provided on the upper surface of the light-transmitting plate body, and an optical film assembly is provided in the first groove. That is to say, a space for accommodating the optical film assembly is provided on the light-transmitting plate body, so that it can serve as a back plate. Compared with the traditional edge-entry backlight module, the edge-entry backlight module of the embodiment of the present application can save a light guide plate or a back plate, thereby greatly reducing the thickness of the edge-entry backlight module, and further reducing the thickness of the display device using the edge-entry backlight module, thereby meeting consumers' demand for a thin and light design of the display device; due to the reduction of optical components, the assembly process of the edge-entry backlight module can also be simplified, thereby improving the production efficiency of the edge-entry backlight module. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the description of the embodiments.

[0022] Figure 1 It is a schematic structural diagram of the side-in type backlight module provided by the embodiment of the present application.

[0023] Figure 2 It is a schematic structural diagram of the display device provided by the embodiment of the present application.

[0024] Description of component symbols:

[0025] 100 - Side-in type backlight module; 10 - Translucent plate body; 11 - Bottom plate; 111 - Upper surface; 101 - First groove; 102 - Second groove; 112 - Lower surface; 113 - Side surface; 103 - Third groove; 12 - Side plate; 13 - Accommodating space; 20 - Light source; 30 - Optical film assembly; 40 - Reflective layer; 50 - Connecting member; 51 - First connecting portion; 52 - Second connecting portion; 200 - Display device; 210 - Display panel; 220 - Adhesive material. Detailed implementation manners

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0027] In the present application, unless otherwise clearly defined and limited, terms such as "installed", "connected", "connected to", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0028] The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In this application, unless otherwise clearly defined or limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0030] In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0031] Please refer to Figure 1 , an embodiment of this application provides a side-entry backlight module 100, including a light-transmitting plate body 10, a light source 20, and an optical film assembly 30. The light-transmitting plate body 10 includes a bottom plate 11. The bottom plate 11 has an upper surface 111 and a lower surface 112 arranged oppositely. The upper surface 111 is provided with a first groove 101. The light source 20 is arranged on the side of the bottom plate 11, and the optical film assembly 30 is arranged in the first groove 101.

[0032] It should be noted that the upper surface 111 of the bottom plate 11 is the light-emitting surface of the light-transmitting plate body 10.

[0033] The side - entry backlight module 100 provided by the embodiment of the present application uses the light - transmissive plate body 10 to act as both the backplane and the light guide plate at the same time. On the one hand, the light - transmissive plate body 10 has good light - transmissive performance and can act as a light guide plate to convert the point light source 20 on the side into a surface light source 20. On the other hand, a first groove 101 is provided on the upper surface 111 of the light - transmissive plate body 10, and an optical film assembly 30 is provided in the first groove 101. That is to say, a space for accommodating the optical film assembly 30 is provided on the light - transmissive plate body 10, so that it can act as a backplane. Compared with the traditional side - entry backlight module 100, the side - entry backlight module 100 of the embodiment of the present application can save a light guide plate or a backplane, thereby greatly reducing the thickness of the side - entry backlight module 100. Furthermore, the thickness of the display device applying this side - entry backlight module 100 can be reduced, so as to meet the consumer's demand for the thin and light design of the display device. Since the optical components are reduced, the assembly process flow of the side - entry backlight module 100 can also be simplified, and the production efficiency of the side - entry backlight module 100 can be improved.

[0034] Exemplarily, the optical film assembly 30 includes a brightness enhancement film, a diffusion film, etc.

[0035] Exemplarily, the light source 20 is an LED (light - emitting diode) light bar.

[0036] Exemplarily, the light transmittance of the light - transmissive plate body 10 to visible light is above 80%, such as 80%, 82%, 85%, 88%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 100%, etc.

[0037] Exemplarily, visible light refers to light with a wavelength between 380 and 780 nm.

[0038] Please refer to Figure 1 , a second groove 102 is provided on the side surface 113 of the bottom plate 11, and at least a part of the light source 20 is accommodated in the second groove 102.

[0039] It can be understood that by providing the second groove 102 on the side surface 113 of the bottom plate 11 and arranging the light source 20 in the second groove 102, it is beneficial to make all the light emitted by the light source 20 pass through the groove surface of the second groove 102 and enter the light - transmissive plate body 10, thereby improving the light utilization rate, further improving the light - emitting brightness of the backlight module. And, the width of the non - light - emitting area at the edge of the backlight module can also be reduced, and then the frame width of the display device including this side - entry backlight module 100 can be reduced, which is beneficial to realizing the narrow - frame design of the display device.

[0040] Please refer to Figure 1, a reflective layer 40 is provided on the lower surface 112 of the bottom plate 11 and the area on the side surface 113 of the bottom plate 11 that does not correspond to the light source 20.

[0041] It can be understood that the reflective layer 40 is not provided on the groove surface of the second groove 102.

[0042] It should be noted that by providing the reflective layer 40 on the lower surface 112 and the side surface 113 of the bottom plate 11, the reflective layer 40 can be used to reflect the light that cannot be emitted from the light-emitting surface, avoiding light leakage loss. When the light is reflected multiple times on the lower surface 112 and / or the side surface 113 of the bottom plate 11, it can finally be emitted from the upper surface 111 (light-emitting surface) of the bottom plate 11. Therefore, the light utilization rate of the backlight module can be improved.

[0043] Exemplarily, the material of the reflective layer 40 may include resin materials (such as polycarbonate, polyethylene, etc.) or metals (such as aluminum).

[0044] It can be understood that the upper surface 111 of the bottom plate 11 is the light-emitting surface of the light-transmitting plate body 10, so there is no need to provide a reflective layer 40.

[0045] Please refer to Figure 1 , the light-transmitting plate body 10 further includes a side plate 12. The side plate 12 is connected to the bottom plate 11, and the side plate 12 and the bottom plate 11 jointly enclose a receiving space 13, and the receiving space 13 can be used to accommodate the display panel 210.

[0046] It can be understood that by providing the side plate 12 in the light-transmitting plate body 10 and using the side plate 12 and the bottom plate 11 to enclose the receiving space 13 for accommodating the display panel 210, not only can the middle frame be omitted, saving production costs, but also the thickness of the display device can be reduced, so that an ultra-thin display device can be prepared. Since the side plate 12 of the light-transmitting plate body 10 can also limit the movement of the display panel 210 in the horizontal plane, the connection stability between the display panel 210 and the backlight module can be improved, and further the structural stability of the display device can be improved.

[0047] Please refer to Figure 1 , a reflective layer 40 is provided on the outer surface of the side plate 12.

[0048] It should be noted that by providing the reflective layer 40 on the outer surface of the side plate 12, the reflective layer 40 can be used to reflect the light entering the side plate 12, avoiding light leakage loss. When the light is reflected multiple times on the outer surface of the side plate 12, the lower surface 112 and / or the side surface 113 of the bottom plate 11, it can finally be emitted from the upper surface 111 (light-emitting surface) of the bottom plate 11. Therefore, the light utilization rate of the backlight module can be improved.

[0049] Please refer toFigure 1 The side - entry backlight module 100 further includes a connecting member 50. Both the light source 20 and the light - transmissive plate body 10 are connected to the connecting member 50 to achieve the fixed connection between the light source 20 and the light - transmissive plate body 10.

[0050] Exemplarily, the material of the connecting member 50 can be metal. Since metal has good heat - dissipation performance, the heat - dissipation effect of the connecting member 50 can be improved, enabling the heat generated by the light source 20 to be conducted to the air through the connecting member 50 at a relatively fast speed.

[0051] Please refer to Figure 1 The connecting member 50 includes a first connecting portion 51 and a second connecting portion 52 connected to each other. The first connecting portion 51 is connected to the light source 20, the side surface 113 of the bottom plate 11, and the side surface 113 of the side plate 12. The second connecting portion 52 is connected to the side of the side plate 12 facing away from the bottom plate 11.

[0052] Exemplarily, the first connecting portion 51 and the second connecting portion 52 are perpendicular to each other.

[0053] Exemplarily, the thickness of the first connecting portion 51 is greater than the thickness of the second connecting portion 52. Since the light source 20 is in direct contact with the first connecting portion 51, that is to say, the heat of the light source 20 will be conducted to the first connecting portion 51 in the first place. Because the first connecting portion 51 has a larger thickness and better heat - dissipation effect, it can transfer the heat of the light source 20 at a relatively fast speed.

[0054] It can be understood that by setting the connecting member 50 to include the first connecting portion 51 and the second connecting portion 52, and the first connecting portion 51 and the second connecting portion 52 are respectively connected to different regions of the light - transmissive plate body 10, the connection stability between the light source 20 and the light - transmissive plate body 10 can be improved.

[0055] Please refer to Figure 1 On the upper surface 111 of the bottom plate 11, a third groove 103 is provided in the peripheral area of the first groove 101. The third groove 103 can be used to fill with an adhesive material 220 to bond the display panel 210.

[0056] It can be understood that by filling the adhesive material 220 into the third groove 103 and using the adhesive material 220 to connect the display panel 210 and the bottom plate 11, not only can the connection and fixation between the display panel 210 and the bottom plate 11 be achieved, but also the interval between the bottom surface of the display panel 210 and the upper surface 111 of the bottom plate 11 can be reduced, which is beneficial to reducing the thickness of the backlight module.

[0057] It can be understood that when the distance between the bottom surface of the display panel 210 and the upper surface 111 of the bottom plate 11 decreases, the gap between the display panel 210 and the optical film assembly 30 decreases, thereby reducing the degree of freedom of movement of the optical film assembly 30 within this gap, making it less likely for the optical film assembly 30 to experience conditions such as film deformation.

[0058] Exemplarily, the third groove 103 is annular, the third groove 103 surrounds the first groove 101, and is spaced apart from the first groove 101.

[0059] Exemplarily, the material of the light-transmitting plate body 10 is glass. It can be understood that glass has a high light transmittance, so that the light-transmitting plate body 10 can function as a light guide plate. Moreover, glass has high mechanical strength, so that the light-transmitting plate body 10 can act as a back plate. In addition, the glass material has a good heat dissipation effect, which can dissipate the heat generated by the light source 20 to avoid the temperature of the backlight module being too high and affecting the electronic components of the display device.

[0060] Exemplarily, when the material of the light-transmitting plate body 10 is glass, the first groove 101 and the third groove 103 on the bottom plate 11 can be prepared by laser etching.

[0061] Exemplarily, the glass is tempered glass. Tempered glass has high safety, high strength, and good thermal stability: (1) After being broken, tempered glass forms small obtuse-angled particles similar to a honeycomb, which will not cause harm to the human body, greatly improving its safety; (2) The impact resistance and flexural strength of tempered glass are 3 to 6 times that of ordinary glass, making it not easily broken when subjected to external impact; (3) Tempered glass has good thermal stability and can withstand a temperature difference 3 times that of ordinary glass, and can withstand a temperature difference change of 200 °C, which has an obvious effect on preventing thermal cracking. Therefore, tempered glass is more suitable for use in the side-entry backlight module 100 of the embodiments of the present application than ordinary glass.

[0062] Exemplarily, the light-transmitting plate body 10 is an integral structure, which can not only improve the overall mechanical strength of the light-transmitting plate body 10, but also make the shape of the side-entry backlight module 100 more beautiful.

[0063] Please refer to Figure 2 and also refer to Figure 1 The embodiments of the present application provide a display device 200, including the side-entry backlight module 100 as described above.

[0064] Please refer to Figure 2, the display device 200 further includes a display panel 210. The light-transmitting plate body 10 further includes a side plate 12. The side plate 12 is connected to the bottom plate 11. The side plate 12 and the bottom plate 11 jointly enclose a receiving space 13, and the display panel 210 is disposed in the receiving space 13.

[0065] Exemplarily, the display panel 210 is a liquid crystal display panel.

[0066] Please refer to Figure 2 , on the upper surface 111 of the bottom plate 11, a third groove 103 is provided in the peripheral area of the first groove 101. The third groove 103 is provided with an adhesive material 220, and the display panel 210 is adhered to the bottom plate 11 through the adhesive material 220.

[0067] Exemplarily, the adhesive material 220 is a double-sided foam tape. The double-sided foam tape refers to a tape with foam as the base material and pressure-sensitive adhesive coated on both sides. It is usually relatively thick and has good shock absorption performance, which can improve the safety of the display panel 210 during installation and prevent the display panel 210 from colliding with the light-transmitting plate body 10 and the optical film assembly 30 during installation, resulting in wear and other situations.

[0068] The above has introduced the side-in type backlight module and the display device provided by the embodiments of the present application in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the present application. At the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A side-entry backlight module, characterized in that, Comprising: A light-transmitting plate body, the light-transmitting plate body includes a bottom plate, the bottom plate has an upper surface and a lower surface arranged oppositely, and a first groove is provided on the upper surface; the light-transmitting plate body further includes side plates, the side plates are connected to the bottom plate, and the side plates and the bottom plate jointly enclose an accommodating space, and the accommodating space can be used to accommodate a display panel; A light source, arranged on the side of the bottom plate; An optical film assembly, arranged in the first groove.

2. The side-entry type backlight module according to claim 1, wherein A second groove is provided on the side surface of the bottom plate, and at least a part of the light source is accommodated in the second groove.

3. The side-entry backlight module according to claim 1, wherein Reflective layers are provided on the lower surface of the bottom plate and the area on the side surface of the bottom plate that does not correspond to the light source.

4. The side-entry type backlight module according to claim 1, wherein, A reflective layer is provided on the outer surface of the side plate.

5. The side-entry backlight module according to any one of claims 1-4, characterized in that The edge-lit backlight module further includes a connecting member, and both the light source and the light-transmitting plate body are connected to the connecting member to realize the fixed connection between the light source and the light-transmitting plate body.

6. The side-in type backlight module according to claim 5, wherein, The connecting member includes a first connecting portion and a second connecting portion connected to each other. The first connecting portion connects the light source, the side surface of the bottom plate, and the side surface of the side plate, and the second connecting portion connects the side of the side plate away from the bottom plate.

7. The side-injection backlight module according to any one of claims 1-4, characterized in that, A third groove is provided on the upper surface of the bottom plate in the peripheral area of the first groove, and the third groove can be used to fill with adhesive to bond the display panel.

8. The side-entry type backlight module according to any one of claims 1 to 4, characterized in that, The material of the light-transmitting plate body is glass; and / or The light-transmitting plate body is of an integral structure.

9. A display device, characterized in that, Comprising the edge-lit backlight module according to any one of claims 1-8.

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