Bilateral light incidence backlight module and liquid crystal display equipment

Abstract

The bilateral light-in backlight module comprises a back plate, light sources and a light guide plate, the light sources are arranged at the upper end and the lower end or the left end and the right end of the back plate, the light guide plate is arranged in the back plate, a gap is formed between the light guide plate and the light sources, and a plurality of elastic components are arranged in the gap. The two ends of the elastic component abut against the light guide plate and the light source respectively, so that gaps between the light guide plate and the light source are equal. The elastic component is arranged in the gap between the light guide plate and the light source, the elastic component can position the light guide plate, the elastic force of the elastic component can enable the gap between the light guide plate and the light source to be equal, poor display caused by uneven gaps between the light guide plate and the light source is avoided, and the tolerance control requirement for mass production materials can be lowered. The yield of component materials is improved; the elastic component has a protection effect on the light source and can prevent the light source from being pressed or crashed.

Description

Technical Field

[0001] The present application relates to the technical field of liquid crystal display devices, and in particular to a double-sided light-input backlight module and a liquid crystal display device. Background Art

[0002] Liquid crystal display devices are mainly composed of liquid crystal panels and backlight modules. The backlight modules can be divided into side-entry backlight modules and direct-type backlight modules according to the position of the light source. The side-entry backlight is mainly composed of light source, light guide plate, optical film, and structural parts. According to the number of light sources used, the side-entry backlight module can be divided into single-side light, double-side light, and multi-side light. With the continuous improvement of consumer demand, the requirements for the brightness, resolution, color gamut and other specifications of liquid crystal display products are gradually increasing. The side-entry single-side light input method can no longer meet the above requirements. Double-side light or multi-side light input methods are required to meet the needs of consumers. At present, the side-entry backlight module with double-side light input usually positions the light guide plate through structural parts. In the actual production process, due to the dimensional tolerance of the structural parts and the light guide plate materials, the gap between the light guide plate and the light source is uneven, which brings about the problems of insufficient brightness uniformity, uneven display screen, and low energy utilization. It may even cause the light guide plate to expand after being heated and damage the light source. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a double-sided light-input backlight module capable of positioning a light guide plate so that the gap between the light guide plate and the light source is uniform.

[0004] The present application also proposes a liquid crystal display device having the above-mentioned double-sided light-input backlight module.

[0005] According to the first aspect of the present application, a double-sided light-input backlight module includes:

[0006] Back panel;

[0007] A light source, the light source is arranged at the upper and lower ends or the left and right ends of the back plate;

[0008] A light guide plate, the light guide plate being arranged inside the back plate;

[0009] A gap is provided between the light guide plate and the light source, and a plurality of elastic components are provided in the gap. Two ends of the elastic components respectively abut against the light guide plate and the light source to make the gap between the light guide plate and the light source equal.

[0010] A double-sided light-input backlight module according to the first aspect of the embodiment of the present application has at least the following beneficial effects: A double-sided light-input backlight module of the present application includes a back plate, a light source and a light guide plate, the light source is arranged at the upper and lower ends or the left and right ends of the back plate, the light guide plate is arranged in the back plate, a gap is arranged between the light guide plate and the light source, a plurality of elastic components are arranged in the gap, and the two ends of the elastic component respectively abut the light guide plate and the light source to make the gap between the light guide plate and the light source equal. The elastic component is arranged in the gap between the light guide plate and the light source, the elastic component can position the light guide plate, the elastic force of the elastic component can make the gap between the light guide plate and the light source equal, avoid poor display caused by uneven gap between the light guide plate and the light source, and can also reduce the tolerance control requirements for mass-produced materials, thereby improving the yield of component materials; the elastic component also has a protective effect on the light source, which can prevent the light source from being pressed or damaged.

[0011] According to some embodiments of the present application, the elastic component includes a spring.

[0012] According to some embodiments of the present application, the length of the spring when compressed to the shortest length is 0.15-0.25 mm.

[0013] According to some embodiments of the present application, the light source includes an upper light source and a lower light source, and the upper light source and the lower light source are respectively arranged at the upper and lower ends of the back panel, and the elastic component includes an upper elastic component and a lower elastic component, the upper elastic component is arranged between the upper light source and the light guide plate, and the lower elastic component is arranged between the lower light source and the light guide plate.

[0014] According to some embodiments of the present application, the lower elastic component supports the light guide plate, and the elastic force of the lower elastic component is equal to the sum of the weight of the light guide plate and the elastic force of the upper elastic component, so that the gap between the upper light source and the light guide plate is equal to the gap between the lower light source and the light guide plate.

[0015] According to some embodiments of the present application, two of the upper elastic components and the lower elastic components are provided, and the two upper elastic components are respectively provided on the left and right sides of the light guide plate, and the two lower elastic components are respectively provided on the left and right sides of the light guide plate.

[0016] According to some embodiments of the present application, the light source includes a left light source and a right light source, and the left light source and the right light source are respectively arranged at the left and right ends of the back panel, and the elastic component includes a left elastic component and a right elastic component, the left elastic component is arranged between the left light source and the light guide plate, and the right elastic component is arranged between the right light source and the light guide plate.

[0017] According to some embodiments of the present application, the elastic force of the left elastic component is equal to the elastic force of the right elastic component, so that the gap between the left light source and the light guide plate is equal to the gap between the right light source and the light guide plate.

[0018] According to some embodiments of the present application, two of the left elastic component and the right elastic component are provided, and the two left elastic components are respectively provided on the upper and lower sides of the light guide plate, and the two right elastic components are respectively provided on the upper and lower sides of the light guide plate.

[0019] According to the second aspect of the present application, the liquid crystal display device includes a double-sided light input backlight module of the first aspect, and also includes an optical film, a middle frame and a liquid crystal panel, wherein the optical film is arranged on the light guide plate, and the middle frame is used to connect the liquid crystal panel and the double-sided light input backlight module.

[0020] A liquid crystal display device according to an embodiment of the second aspect of the present application has at least the following beneficial effects: a liquid crystal display device of the present application, comprising a double-sided light input backlight module of the embodiment of the first aspect above, and further comprising an optical film, a middle frame and a liquid crystal panel, wherein the optical film is arranged on the light guide plate, and the middle frame is used to connect the liquid crystal panel and the double-sided light input backlight module. The double-sided light input backlight module can position the light guide plate by arranging an elastic component in the gap between the light guide plate and the light source, and the elastic force of the elastic component can make the gap between the light guide plate and the light source equal, thereby avoiding poor display caused by the uneven gap between the light guide plate and the light source, and can also reduce the tolerance control requirements for mass-produced materials, thereby improving the yield of component materials; the elastic component also has a protective effect on the light source, and can prevent the light source from being crushed or damaged.

[0021] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 It is a structural schematic diagram of a double-sided light-input backlight module positioned by structural parts in the prior art;

[0024] Figure 2 yes Figure 1 An enlarged schematic diagram of point A is shown;

[0025] Figure 3 is a structural schematic diagram of a liquid crystal display device according to an embodiment of the present application;

[0026] Figure 4This is a schematic structural diagram of a double-sided light-incident backlight module according to an embodiment of the present application;

[0027] Figure 5 yes Figure 4 An enlarged schematic diagram of point B is shown.

[0028] Reference numerals:

[0029] Light guide plate 100, structural member 110, optical film 120;

[0030] Light source 200;

[0031] Back panel 300;

[0032] Elastic member 400;

[0033] Liquid crystal panel 500 and middle frame 510 . DETAILED DESCRIPTION

[0034] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0035] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, inside, outside, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0036] In the description of this application, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0037] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, assembling, and matching should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0038] like Figure 1 and Figure 2As shown, the double-sided light-input backlight module in the prior art usually positions the light guide plate 100 through the structural member 110. In the actual production process, due to the dimensional tolerance of the structural member 110 and the material of the light guide plate 100, the gap between the light guide plate 100 and the light source 200 is uneven, resulting in problems such as insufficient brightness uniformity, uneven display image, and low energy utilization rate. It may even cause the light guide plate 100 to expand after being heated and damage the light source 200.

[0039] Refer to the following Figures 4 to 5 A double-sided light-input backlight module according to an embodiment of the present application is described.

[0040] A double-side incident light backlight module according to an embodiment of the present application, such as Figures 4 to 5 As shown, it includes a back plate 300, a light source 200 and a light guide plate 100, the light source 200 is arranged at the upper and lower ends or the left and right ends of the back plate 300, the light guide plate 100 is arranged in the back plate 300, a gap is arranged between the light guide plate 100 and the light source 200, a plurality of elastic components 400 are arranged in the gap, and the two ends of the elastic component 400 respectively abut the light guide plate 100 and the light source 200, so that the gap between the light guide plate 100 and the light source 200 is equal. The light source 200 is arranged at the upper and lower ends or the left and right ends of the back plate 300, the light guide plate 100 is arranged in the back plate 300, a gap is arranged between the light guide plate 100 and the light source 200, a plurality of elastic components 400 are arranged in the gap, and the two ends of the elastic component 400 respectively abut the light guide plate 100 and the light source 200, so that the gap between the light guide plate 100 and the light source 200 is equal. The elastic component 400 is arranged in the gap between the light guide plate 100 and the light source 200. The elastic component 400 can position the light guide plate 100. The elastic force of the elastic component 400 can make the gap between the light guide plate 100 and the light source 200 equal, thereby avoiding poor display caused by uneven gap between the light guide plate 100 and the light source 200, and can also reduce the tolerance control requirements for mass production materials, thereby improving the yield rate of component materials. The elastic component 400 also has a protective effect on the light source 200, and can prevent the light source 200 from being crushed or damaged.

[0041] It is understandable that, in some embodiments, the light source 200 is arranged at the upper and lower ends of the back plate 300, and the light guide plate 100 is arranged in the back plate 300. At this time, there is a gap between the upper and lower end surfaces of the light guide plate 100 and the light sources 200 arranged at the upper and lower ends of the back plate 300. The elastic component 400 is arranged in the gap, the lower elastic component 400 supports the light guide plate 100, and the upper elastic component 400 abuts against the light guide plate 100. The lower elastic component 400 cooperates with the upper elastic component 400 to make the gap between the light guide plate 100 and the light source 200 equal. It should be noted that, in some embodiments, when the light source 200 is arranged at the upper and lower ends of the back plate 300, the light source 200 is not arranged at the left and right ends of the back plate 300 at this time, and the gap between the left and right ends of the light guide plate 100 and the back plate 300 will not affect the brightness uniformity and the display screen, so at this time, the positioning of the left and right ends can be performed by the traditional positioning method of the structural member 110, or by the elastic component 400.

[0042] In other embodiments, the light source 200 is disposed at the left and right ends of the back plate 300. In this case, there is a gap between the left and right end surfaces of the light guide plate 100 and the light sources 200 disposed at the left and right ends of the back plate 300. The elastic component 400 is disposed in the gap, and the elastic components 400 at the left and right ends abut against the light guide plate 100. The elastic component 400 on the left cooperates with the elastic component 400 on the right, so that the gap between the light guide plate 100 and the light source 200 can be equal. It should be noted that in some embodiments, when the light source 200 is disposed at the left and right ends of the back plate 300, the light source 200 is not disposed at the upper and lower ends of the back plate 300. The gap between the upper and lower ends of the light guide plate 100 and the back plate 300 will not affect the brightness uniformity and the display screen, so the positioning of the upper and lower ends can be performed by either the traditional positioning method of the structural member 110 or the elastic component 400.

[0043] In some embodiments, the elastic component 400 is configured as a spring. The elastic component 400 is disposed in the gap between the light guide plate 100 and the light source 200. The elastic component 400 is configured as a spring. The two ends of the spring abut against the light guide plate 100 and the light source 200 respectively. The spring can provide support for the light guide plate 100, limit the relative position of the light guide plate 100 and the light source 200, ensure that the gap between the light guide plate 100 and the light source 200 is equal, and avoid poor display caused by uneven gap between the light guide plate 100 and the light source 200. The spring has good telescopic rebound performance. During the production, transportation and use process, the spring can play a buffering role between the light source 200 and the light guide plate 100, protect the light source 200, and prevent the light source 200 from being pressed or damaged.

[0044] In some embodiments, the length of the spring when compressed to the shortest is 0.15-0.25 mm. The elastic component 400 is set as a spring. The spring has good telescopic resilience. When the spring is compressed to the shortest length, the length of the spring is 0.15-0.25 mm. After the spring is compressed to the shortest, it is no longer deformed by force. At this time, the length of the spring abutting between the light guide plate 100 and the light source 200 is the shortest distance between the light guide plate 100 and the light source 200, that is, the spring can prevent the light guide plate 100 from contacting the light source 200, avoid the light source 200 from being hit by the light guide plate 100, and protect the light source 200.

[0045] Reference Figure 4 and Figure 5 In some embodiments, the light source 200 includes an upper light source and a lower light source, which are respectively arranged at the upper and lower ends of the back plate 300, and the elastic component 400 includes an upper elastic component and a lower elastic component, the upper elastic component is arranged between the upper light source and the light guide plate 100, and the lower elastic component is arranged between the lower light source and the light guide plate 100. The light source 200 is arranged at the upper and lower ends of the back plate 300. Specifically, the light source 200 includes an upper light source and a lower light source, the upper light source is arranged at the upper end of the back plate 300, and the lower light source is arranged at the lower end of the back plate 300. The elastic component 400 includes an upper elastic component and a lower elastic component, the upper elastic component abuts the light guide plate 100 between the upper light source and the light guide plate 100, and the lower elastic component supports the light guide plate 100 between the lower light source and the light guide plate 100, so as to realize the positioning of the light guide plate 100 in the upper and lower directions. The positioning method using the elastic component 400 can reduce the tolerance control requirements for mass production materials and improve the yield rate of component materials. It can be understood that the lower elastic component needs to support the light guide plate 100. By selecting the lower elastic component and the upper elastic component, it can be ensured that the gap between the light guide plate 100 and the light source 200 is equal through the cooperation of the upper elastic component and the lower elastic component, thereby avoiding poor display caused by uneven gap between the light guide plate 100 and the light source 200.

[0046] Reference Figure 4 and Figure 5 Specifically, in some embodiments, the lower elastic component supports the light guide plate 100, and the elastic force of the lower elastic component is equal to the sum of the weight of the light guide plate 100 and the elastic force of the upper elastic component, so that the gap between the upper light source and the light guide plate 100 is equal to the gap between the lower light source and the light guide plate 100. The lower elastic component needs to support the light guide plate 100, and the upper elastic component abuts the light guide plate 100. When the elastic force of the lower elastic component is equal to the sum of the weight of the light guide plate 100 and the elastic force of the upper elastic component, the forces on the upper and lower ends of the light guide plate 100 are balanced, and the gaps between the light guide plate 100 and the light source 200 are equal.

[0047] Reference Figure 4 and Figure 5 In some embodiments, two upper elastic components and two lower elastic components are provided, and the two upper elastic components and the two lower elastic components are respectively provided on the left and right sides of the light guide plate 100. The upper elastic components abut the light guide plate 100 on the left and right sides of the light guide plate 100, and the lower elastic components support the light guide plate 100 on the left and right sides of the light guide plate 100, and limit the light guide plate 100 from the left and right sides, which can improve the positioning and limiting effect of the light guide plate 100, thereby ensuring the relative position between the light guide plate 100 and the light source 200 is accurate.

[0048] In some embodiments, the light source 200 includes a left light source and a right light source, and the left light source and the right light source are respectively arranged at the left and right ends of the back panel 300, and the elastic component 400 includes a left elastic component and a right elastic component, and the left elastic component is arranged between the left light source and the light guide plate 100, and the right elastic component is arranged between the right light source and the light guide plate 100. The light source 200 is arranged at the left and right ends of the back plate 300. Specifically, the light source 200 includes a left light source and a right light source. The left light source is arranged at the left end of the back plate 300, and the right light source is arranged at the right end of the back plate 300. The elastic component 400 includes a left elastic component and a right elastic component. The left elastic component abuts the light guide plate 100 between the left light source and the light guide plate 100, and the right elastic component supports the light guide plate 100 between the right light source and the light guide plate 100. The left elastic component abuts the light guide plate 100 on the left side of the light guide plate 100, and the right elastic component abuts the light guide plate 100 on the right side of the light guide plate 100, so as to realize the positioning of the light guide plate 100 in the left and right directions. The positioning method using the elastic component 400 can reduce the tolerance control requirements for mass production materials and improve the yield rate of component materials.

[0049] Specifically, in some embodiments, the elastic force of the left elastic component is equal to the elastic force of the right elastic component, so that the gap between the left light source and the light guide plate 100 is equal to the gap between the right light source and the light guide plate 100. The left elastic component abuts the light guide plate 100 on the left side of the light guide plate 100, and the right elastic component abuts the light guide plate 100 on the right side of the light guide plate 100. The elastic force of the left elastic component is equal to the elastic force of the right elastic component. The force on the light guide plate 100 is balanced under the cooperation of the left elastic component and the right elastic component. The light guide plate 100 is set in the middle of the back plate 300 to achieve equal gaps between the light guide plate 100 and the light source 200.

[0050] In some embodiments, two left elastic components and two right elastic components are provided, and the two left elastic components and the two right elastic components are respectively provided on the upper and lower sides of the light guide plate 100. The left elastic component abuts against the light guide plate 100 on the upper and lower sides of the light guide plate 100, and the right elastic component abuts against the light guide plate 100 on the upper and lower sides of the light guide plate 100, and the light guide plate 100 is limited from the upper and lower sides, which can improve the positioning and limiting effect of the light guide plate 100, thereby ensuring the relative position between the light guide plate 100 and the light source 200 is accurate.

[0051] like Figure 3 As shown, the liquid crystal display device of the embodiment of the present application includes the above-mentioned double-sided light input backlight module, and also includes an optical film 120, a middle frame 510 and a liquid crystal panel 500. The optical film 120 is arranged on the light guide plate 100, and the middle frame 510 is used to connect the liquid crystal panel 500 and the double-sided light input backlight module. The double-sided light input backlight module can position the light guide plate 100 by arranging the elastic component 400 in the gap between the light guide plate 100 and the light source 200. The elastic force of the elastic component 400 can make the gap between the light guide plate 100 and the light source 200 equal, avoid the display defect caused by the uneven gap between the light guide plate 100 and the light source 200, and can also reduce the tolerance control requirements for mass production materials, thereby improving the yield rate of component materials; the elastic component 400 also has a protective effect on the light source 200, which can prevent the light source 200 from being pressed or damaged.

[0052] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present application.

Claims

1. A double-sided light-input backlight module, It is characterized in that include: Back panel; A light source, the light source is arranged at the upper and lower ends or the left and right ends of the back plate; A light guide plate, the light guide plate being arranged inside the back plate; A gap is provided between the light guide plate and the light source, and a plurality of elastic components are provided in the gap. Two ends of the elastic components respectively abut against the light guide plate and the light source to make the gap between the light guide plate and the light source equal.

2. The double-sided light-incident backlight module according to claim 1, It is characterized in that The elastic component includes a spring.

3. The double-sided light-incident backlight module according to claim 2, It is characterized in that The length of the spring when compressed to the shortest length is 0.15-0.25 mm.

4. The double-sided light-incident backlight module according to claim 1, It is characterized in that The light source includes an upper light source and a lower light source, and the upper light source and the lower light source are respectively arranged at the upper and lower ends of the back plate. The elastic component includes an upper elastic component and a lower elastic component, and the upper elastic component is arranged between the upper light source and the light guide plate, and the lower elastic component is arranged between the lower light source and the light guide plate.

5. The double-sided light-incident backlight module according to claim 4, It is characterized in that The lower elastic component supports the light guide plate, and the elastic force of the lower elastic component is equal to the sum of the weight of the light guide plate and the elastic force of the upper elastic component, so that the gap between the upper light source and the light guide plate is equal to the gap between the lower light source and the light guide plate.

6. The double-sided light-incident backlight module according to claim 4, It is characterized in that Two upper elastic components and two lower elastic components are provided, the two upper elastic components are respectively provided on the left and right sides of the light guide plate, and the two lower elastic components are respectively provided on the left and right sides of the light guide plate.

7. The double-sided light-incident backlight module according to claim 1, It is characterized in that The light source includes a left light source and a right light source, and the left light source and the right light source are respectively arranged at the left and right ends of the back panel. The elastic component includes a left elastic component and a right elastic component, and the left elastic component is arranged between the left light source and the light guide plate, and the right elastic component is arranged between the right light source and the light guide plate.

8. The double-sided light-incident backlight module according to claim 7, It is characterized in that The elastic force of the left elastic component is equal to the elastic force of the right elastic component, so that the gap between the left light source and the light guide plate is equal to the gap between the right light source and the light guide plate.

9. The double-sided light-incident backlight module according to claim 7, It is characterized in that Two left elastic components and two right elastic components are provided, the two left elastic components are respectively provided on the upper and lower sides of the light guide plate, and the two right elastic components are respectively provided on the upper and lower sides of the light guide plate.

10. Liquid crystal display devices, It is characterized in that It comprises a double-sided light input backlight module as described in any one of claims 1 to 9, and also comprises an optical film, a middle frame and a liquid crystal panel, wherein the optical film is arranged on the light guide plate, and the middle frame is used to connect the liquid crystal panel and the double-sided light input backlight module.

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