Backlight structure with casting and vehicle-mounted display module

Abstract

The utility model discloses a backlight structure with a casting and a vehicle-mounted display module, and the backlight structure with the casting comprises the casting which is provided with an accommodating space with an opening at one end; a first groove and a second groove are formed in the inner bottom of the casting, the peripheral edge of the first groove is arranged to be a fillet, and the second groove is located in the first groove; the backlight module is mounted in the accommodating space of the casting; the backlight module comprises a reflector plate and a light guide plate, one side of the reflector plate is arranged on the inner bottom of the casting, and the light guide plate is arranged on the other side of the reflector plate. The first groove is additionally formed in the position of the second groove formed in the surface of the casting extruded by the ejector pin, and the periphery of the first groove is chamfered, so that the problem that a light guide plate is damaged by burrs of an ejector pin groove is avoided. Therefore, the cost is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle display module technical field especially is involved in a kind of backlight structure and vehicle display module of casting. BACKGROUND

[0002] At present, more and more castings of die casting are used in vehicle backlight module to replace traditional stamping aluminum alloy stand structure, because the castings are beneficial to reduce the cost of whole vehicle (equivalent to the castings structure of whole vehicle is distributed to backlight, saves the stand of backlight module), and also beneficial to structure diversification, meet the various structure needs of customers, so the backlight with castings has obvious advantages, and more and more customers choose the backlight module with castings structure.But, the castings of die casting can form complex structure, stamping parts cannot be diversified due to the influence of stamping process;The castings structure is complex, according to process needs, most castings need double-face ejector pin to eject castings, and the ejector pin extrudes the surface of castings, which is easy to form ejector pin groove 102 (such as Figure 1 ) on the surface of castings 101, due to extrusion, the edge of ejector pin groove 102 is easy to form burr 103 or protruding structure, which is easy to touch the reflective sheet 104 and light guide plate 105 of backlight module, causing the damage of light guide plate 105 net point, main screen white spot, resulting in the defect of backlight module and scrap. SUMMARY

[0003] In order to solve at least the above technical problems, the purpose of the utility model is to provide a kind of backlight structure and vehicle display module with castings, by increasing groove structure in ejector pin groove position and using rounded corner in the periphery of groove, the problem of ejector pin groove burr top injury light guide plate is avoided.

[0004] In order to achieve the above purpose, the utility model provides a kind of backlight structure with castings in one aspect, comprising:

[0005] casting, the casting has a one-end opening containing space;The inner bottom of the casting is formed with first groove and second groove, the periphery edge of the first groove is set as rounded corner, and the second groove is located in the first groove;

[0006] backlight module, installed in the containing space of the casting;

[0007] The backlight module includes reflective sheet and light guide plate, one side of the reflective sheet is arranged on the inner bottom of the casting, and the light guide plate is arranged on the other side of the reflective sheet.

[0008] Further, the first groove is circular groove or elliptical groove, and the diameter of the circular groove or the short diameter of the elliptical groove is greater than the diameter of the second groove.

[0009] Furthermore, the edge of the second groove is formed with a raised burr, and the depth of the first groove is greater than the height of the burr.

[0010] Furthermore, the radius of the rounded corner at the edge of the first groove is equal to the depth of the second groove.

[0011] Furthermore, the interior of the casting has a stepped structure around its perimeter.

[0012] Furthermore, the backlight module also includes an optical film, a liquid crystal display, and a cover plate, wherein:

[0013] The optical film is disposed above the light guide plate;

[0014] The liquid crystal display screen is positioned above the optical film;

[0015] The cover plate is positioned above the liquid crystal display screen.

[0016] Furthermore, a stepped central iron frame is provided between the liquid crystal display screen and the stepped structure.

[0017] Furthermore, a double-sided adhesive sponge is provided between the liquid crystal display screen and the cover plate.

[0018] Furthermore, the surface of the cover plate is flush with the opening end of the casting.

[0019] On the other hand, this utility model also provides an in-vehicle display module, including a display panel and a backlight module, wherein the backlight module adopts the aforementioned backlight structure with castings.

[0020] The backlight structure with a casting provided by this utility model includes: a casting having an accommodating space with an open end; a first groove and a second groove formed on the inner bottom of the casting, the edges of the first groove being rounded, and the second groove located within the first groove; a backlight module installed within the accommodating space of the casting; the backlight module includes a reflector and a light guide plate, one side of the reflector being disposed on the inner bottom of the casting, and the light guide plate being disposed on the other side of the reflector. By adding a first groove at the location of the second groove formed by the ejector pin pressing the surface of the casting, and by using rounded edges around the first groove, the problem of the ejector pin groove burrs damaging the light guide plate is avoided. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the present application and form part of the specification. Together with the embodiments of the present application, they serve to explain the present application but do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of the backlight module structure in the prior art;

[0023] Figure 2 This is a schematic diagram of the backlight structure with castings according to an embodiment of this application;

[0024] Figure 3 This is a schematic diagram of the first and second grooves in an embodiment of this application.

[0025] Explanation of reference numerals in the attached figures:

[0026] 101-Casting; 102-Ejector Pin Groove; 103-Flash; 104-Reflective Sheet; 105-Light Guide Plate; 201-Casting; 202-Second Groove; 203-Flash; 204-Reflective Sheet; 205-Light Guide Plate; 206-First Groove; 207-Rounded Corner; 208-Optical Film; 209-LCD Display Screen; 210-Double-Sided Adhesive Sponge; 211-Intermediate Iron Frame; 212-Cover Plate. Detailed Implementation

[0027] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While some embodiments of this application are shown in the drawings, it should be understood that this application can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this application. It should be understood that the drawings and embodiments of this application are for illustrative purposes only and are not intended to limit the scope of protection of this application.

[0028] It should be understood that the steps described in the method embodiments of this application may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this application is not limited in this respect.

[0029] The term "comprising" and its variations as used herein are open-ended inclusions, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the description below.

[0030] It should be noted that the terms "one" and "multiple" used in this application are illustrative rather than restrictive, and those skilled in the art should understand that, unless explicitly stated otherwise in the context, they should be understood as "one or more". "Multiple" should be understood as two or more.

[0031] It should be understood that although the terms "first," "second," etc., may be used herein to describe various units, these units should not be limited by these terms. These terms are used merely to distinguish one feature from another. For example, without departing from the scope of the exemplary embodiments, a first feature may be referred to as a second feature, and similarly, a second feature may be referred to as a first feature.

[0032] The backlight structure with a casting according to an embodiment of this application includes: a casting having an accommodating space with one end open; a first groove and a second groove formed on the inner bottom of the casting, the four edges of the first groove being rounded, and the second groove being located in the first groove; a backlight module installed in the accommodating space of the casting; the backlight module includes a reflective sheet and a light guide plate, one side of the reflective sheet being disposed on the inner bottom of the casting, and the light guide plate being disposed on the other side of the reflective sheet.

[0033] Example 1

[0034] Figure 2 This is a schematic diagram of the backlight structure with castings according to an embodiment of this application. Figure 3 This is a schematic diagram of the first and second grooves in an embodiment of this application. The following will be combined with... Figure 2 and Figure 3 The backlight structure with castings according to the embodiments of this application will be described in detail.

[0035] like Figure 2 As shown, the backlight structure with casting in this embodiment includes a casting 201. The casting 201 has an accommodating space with one open end, which is used to house the backlight module. In the accommodating space, a reflective sheet 204, a light guide plate 205, an optical film 208, a liquid crystal display screen 209, and a cover plate 212 are arranged sequentially from the inner bottom of the casting 201 outwards.

[0036] like Figure 3 As shown, a first groove 206 and a second groove 202 are formed on the inner bottom of the casting 201. The edges of the first groove 206 are rounded 207, and the second groove 202 is located within the first groove 206. The second groove 202 is actually a groove formed on the surface of the casting 201 by the extrusion of the casting 201 when it is demolded; it is also called an ejector groove. By adding a first groove 206 at the location of the second groove 202, and rounding the edges of the first groove 206, the problem of the burrs 203 around the second groove 202 damaging the light guide plate 205 and the reflector 204 is avoided.

[0037] In some exemplary embodiments, a plurality of second grooves 202 may be formed on the inner bottom of the casting 201, each of which requires a corresponding first groove 206.

[0038] In some exemplary embodiments, the first groove 206 is a circular groove or an elliptical groove, as long as the diameter of the circular groove or the minor diameter of the elliptical groove is greater than the diameter of the second groove 202.

[0039] In some exemplary embodiments, the depth of the first groove 206 depends on the raised burrs 203 formed around the periphery of the second groove 202. The depth of the first groove 206 is required to be greater than the height of the burrs 203 in order to effectively prevent the burrs 203 formed by the ejector pin from hitting the reflector 204 and the light guide plate 205.

[0040] In some exemplary embodiments, the rounded corners 207 at the edge of the first groove 206 are made as large as possible, requiring that the radius of the rounded corners 207 is equal to the depth of the second groove 202.

[0041] In some exemplary embodiments, the interior perimeter of the casting 201 is formed with a stepped structure.

[0042] In some exemplary embodiments, the backlight module, in addition to the aforementioned reflective sheet 204, light guide plate 205, optical film 208, liquid crystal display 209, and cover plate 212, also includes double-sided adhesive sponge 210 and a central iron frame 211. One side of the reflective sheet 204 faces the inner bottom of the casting 201, the light guide plate 205 is disposed on the other side of the reflective sheet 204, the optical film 208 is disposed above the light guide plate 205, the liquid crystal display 209 is disposed above the optical film 208, and the cover plate 212 is disposed above the liquid crystal display 209. The double-sided adhesive sponge 210 is located between the liquid crystal display 209 and the cover plate 212. The central iron frame 211 is disposed on the stepped structure of the casting 201 and is located at the ends of the liquid crystal display 209 and the cover plate 212, providing support for the liquid crystal display 209 and the cover plate 212.

[0043] In some exemplary embodiments, the central iron frame 211 is arranged in a stepped shape.

[0044] In some exemplary embodiments, a double-sided adhesive sponge 210 is provided between the liquid crystal display screen 209 and the cover plate 212.

[0045] In some exemplary embodiments, the surface of the cover plate 212 is flush with the opening end of the casting 201.

[0046] Example 2

[0047] Example 2 is an in-vehicle display module, including a display panel and a backlight module, wherein the backlight module adopts the backlight structure with castings described in the above embodiment. The in-vehicle display module using this backlight structure effectively solves problems such as damage to the light guide plate 105 dots and white spots on the main screen caused by pin burrs, reducing the possibility of scrapping due to backlight defects.

[0048] Although the embodiments disclosed in this utility model are as described above, the content is only for the purpose of facilitating understanding of this utility model and is not intended to limit this utility model. Any person skilled in the art to which this utility model pertains may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in this utility model, but the patent protection scope of this utility model shall still be determined by the scope defined in the appended claims.

Claims

1. A backlight structure with a cast part, characterized by, The application relates to a backlight structure with a casting. The casting has an open accommodating space; The inner bottom of the casting is formed with a first groove and a second groove, the four peripheral edges of the first groove are arranged in a rounded corner mode, and the second groove is arranged in the first groove; A backlight module is arranged in the accommodating space of the casting; The backlight module comprises a reflecting sheet and a light guide plate, one side of the reflecting sheet is arranged on the inner bottom of the casting, and the other side of the reflecting sheet is arranged on the light guide plate.

2. The back light structure with a cast part according to claim 1, wherein The first groove is a circular groove or an elliptical groove, the diameter of the circular groove or the short diameter of the elliptical groove is larger than the diameter of the second groove.

3. The back light structure with a cast part according to claim 1, wherein The edge of the second groove is formed with a raised burr, and the depth of the first groove is larger than the height of the burr.

4. The back light structure with a cast part according to claim 1, wherein The radius of the rounded corner of the edge of the first groove is equal to the depth of the second groove.

5. The back light structure with a cast part according to claim 1, wherein The inner periphery of the casting is formed with a step structure.

6. The back light structure with a cast part according to claim 5, wherein The backlight module further comprises an optical film, a liquid crystal display screen and a cover plate, wherein: The optical film is arranged above the light guide plate; The liquid crystal display screen is arranged above the optical film; The cover plate is arranged above the liquid crystal display screen.

7. The back light structure with a cast part according to claim 6, wherein A stepped metal frame is arranged between the end of the liquid crystal display screen and the step structure.

8. The back light structure with a cast part according to claim 6, wherein A double-sided adhesive sponge is arranged between the liquid crystal display screen and the cover plate.

9. The back light structure with a cast part according to claim 6, wherein The surface of the cover plate is flush with the open end of the casting.

10. A vehicle display module, characterized by The application further relates to a display panel and a backlight module, and the backlight module adopts the backlight structure with a casting according to any one of claims 1-9.

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