Vehicle-mounted backlight module for improving corner dark area and vehicle-mounted display device

Abstract

The vehicle-mounted backlight module comprises a lower frame, a light bar and a light guide plate, the lower frame comprises a bottom plate and a side frame, the bottom plate is fixedly connected to the side frame and forms a containing cavity, the light bar is fixedly connected to the side frame, the light guide plate is arranged in the containing cavity, the light guide plate comprises a boss, and the boss is fixedly connected to the side frame. The lamp strip comprises a plurality of LED lamps and a flexible circuit board, the LED lamps are electrically connected to the flexible circuit board, the boss abuts against or is connected to the flexible circuit board, and the LED lamps are arranged between the bottom plate and the boss in the vertical direction. The vehicle-mounted backlight module capable of improving the corner dark area can solve the problems that in the prior art, the corner dark area appears in the light emitting area, and the boss of the light guide plate is broken, and the display effect and the stability of the backlight module are improved. The utility model further relates to a vehicle-mounted display device.

Description

TECHNICAL FIELD

[0001] The utility model relates to display screen technical field especially, and it is a kind of vehicle-mounted backlight module and vehicle-mounted display device for improving corner dark area. BACKGROUND

[0002] The application of intelligent society display screen is more and more widely, with the application of electric vehicle and automatic driving, the demand of vehicle-mounted electronic product (central control display, instrument panel, rearview mirror, handrail screen etc.) also steadily rises. Followed by, more backlight manufacturers from other fields (mobile phone, tablet, computer, TV) also join vehicle-mounted backlight industry, lead to the requirement of the display effect and vibration test reliability of whole vehicle-mounted backlight industry improves, avoid the display screen to appear display abnormality due to vibration abnormality more and more receive the attention of backlight module manufacturer, and requirement is higher and higher.

[0003] As shown in Figure 1 The traditional backlight module includes lower frame, light bar, reflecting film, light guide plate 21 and optical film piece, light bar is fixedly connected in the side frame inner wall of lower frame, light bar includes flexible circuit board 222 and LED lamp 221 electrically connected with flexible circuit board 222, reflecting film is arranged in lower frame, light guide plate 21 is arranged on reflecting film, optical film piece is arranged on light guide plate 21, light guide plate 21 includes first boss 211 and second boss 212, first boss 211 and second boss 212 are spaced apart along the length direction of light guide plate 21, first boss 211 abuts with one end of light bar, second boss 212 abuts with the other end of light bar, i.e. first boss 211 and second boss 212 are arranged at the side of LED lamp 221 respectively, if first boss 211 and second boss 212 are not broken, then first boss 211 and second boss 212 need to be set to a certain width, but it will lead to the phenomenon that the edge and corner of light emitting area 202 appear dark area 201, if the edge display effect of light emitting area 202 is guaranteed, then the width of first boss 211 and second boss 212 needs to be shortened, it will lead to the phenomenon that first boss 211 and second boss 212 are broken in the process of vibration. UTILITY MODEL CONTENT

[0004] Therefore, the utility model aims at providing a kind of vehicle-mounted backlight module for improving corner dark area, which can solve the phenomenon that the light emitting area appears corner dark area and the boss of light guide plate is broken in the prior art, and improve the display effect and stability of the backlight module.

[0005] The utility model provides a kind of vehicle-mounted backlight module for improving corner dark area, including lower frame, light bar and light guide plate, the lower frame includes bottom plate and side frame, the bottom plate is fixedly connected in the side frame and forms accommodating cavity, the light bar is fixedly connected in the side frame, the light guide plate is arranged in the accommodating cavity, the light guide plate includes boss, the light bar includes multiple LED lamp and flexible circuit board, each the LED lamp is electrically connected to the flexible circuit board respectively, the boss is abutted or connected to the flexible circuit board, the LED lamp is arranged between the bottom plate and the boss in vertical direction.

[0006] In an embodiment, the boss is provided with one, and the boss is arranged along the length direction of the light guide plate; or the boss includes multiple limiting sections, and each limiting section is arranged spaced apart from another limiting section, and one limiting section is arranged corresponding to at least one LED lamp.

[0007] In an embodiment, the distance between the boss and the LED lamp is 0.3mm-1.0mm.

[0008] In an embodiment, the light guide plate includes a body, the boss is fixedly connected to the body, the body includes a light exit surface, the light exit surface is arranged on a side of the body away from the bottom plate, the boss includes an upper surface and a lower surface arranged oppositely, the lower surface is arranged close to the LED lamp, and the distance between the upper surface and the bottom plate is greater than the distance between the light exit surface and the bottom plate.

[0009] In an embodiment, the light exit surface and the upper surface are connected by an arc surface.

[0010] In an embodiment, the light guide plate includes a body, the boss is fixedly connected to the body, the body includes a light exit surface, the light exit surface is arranged on a side of the body away from the bottom plate, the boss includes an upper surface and a lower surface arranged oppositely, the lower surface is arranged close to the LED lamp, and the upper surface and the light exit surface are located on the same horizontal plane.

[0011] In an embodiment, the distance between the upper surface and the lower surface is 1.5mm-2.0mm.

[0012] In an embodiment, the boss includes an abutting surface, the abutting surface is fixedly connected between the upper surface and the lower surface, the abutting surface is fixedly connected with a flexible layer, and the flexible layer is used to avoid damage to the flexible circuit board.

[0013] In an embodiment, the vehicle-mounted backlight module for improving corner dark area further includes a reflective film and an optical film, the reflective film is arranged on the bottom plate, the light guide plate is arranged on the reflective film, and the optical film is arranged on the light guide plate.

[0014] The utility model also relates to a vehicle-mounted display device, including the vehicle-mounted backlight module of improvement corner dark area of above.

[0015] The vehicle-mounted backlight module of the utility model connects the boss to the flexible circuit board, and the LED lamp is arranged between the bottom plate and the boss in the vertical direction, that is, the boss is arranged on the side of the LED lamp away from the bottom plate, the arrangement of the boss not only can avoid the phenomenon of corner dark area and ensure the display effect, but also can effectively improve the abnormal phenomenon of boss fracture and improve the quality of the vehicle-mounted backlight module. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be briefly introduced the drawing needed to be used in the embodiment, it should be understood, the following drawings only show some embodiments of the utility model, therefore should not be regarded as the limitation to the scope, for the ordinary skilled person in the art, under the premise of not paying the creative labor, still can obtain other related drawings according to these drawings.

[0017] Figure 1 It is the partial front view structure schematic diagram of the prior art vehicle-mounted backlight module.

[0018] Figure 2 It is the partial front view structure schematic diagram of the vehicle-mounted backlight module of the first embodiment of the utility model.

[0019] Figure 3 It is the side view structure schematic diagram of the vehicle-mounted backlight module of the first embodiment of the utility model.

[0020] Figure 4 It is the side view structure schematic diagram of the vehicle-mounted backlight module of another preferable embodiment of the utility model.

[0021] Figure 5 It is the partial front view structure schematic diagram of the vehicle-mounted backlight module of the second embodiment of the utility model.

[0022] Figure 6 It is the split structure schematic diagram of the vehicle-mounted backlight module of the utility model.

[0023] Explanation of reference numerals: light emitting area-101;Lower frame-11;Bottom plate-111;Side frame-112;Lamp bar-12;LED lamp-121;Flexible circuit board-122;Light guide plate-13;Body-131;Light exit surface-1311;Boss-132;Upper surface-1321;Lower surface-1322;Butt surface-1323;Limit section 1324;Reflective film-14;Optical film-15;Diffusion film-151;Light enhancement film-152;Brightness enhancement film-153;Middle frame-16.

[0024] The purposes, functional features and advantages of the utility model will be further explained in combination with embodiments and with reference to the drawings. DETAILED DESCRIPTION

[0025] The specific embodiments of the utility model will be described in detail below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the description of the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0026] In the description of the utility model, unless explicitly defined and limited, the terms such as'setting ','installation ','connection'should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected, can be mechanically connected, can be electrically connected, can be directly connected, or indirectly connected through intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0027] The terms'upper ','lower ','left ','right ','front ','back ','top ','bottom ','inner ','outer'and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship usually placed when the utility model product is used, only for the convenience of description and simplification of description, and not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model.

[0028] The terms'first ','second ','third'and the like are only for distinguishing similar attributes of elements, and not for indicating or implying relative importance or a particular order.

[0029] The terms'including ','containing'or any other variant thereof are intended to cover non-exclusive inclusion, in addition to containing the listed elements, other elements not explicitly listed can also be contained.

[0030] As Figure 2 And Figure 3As shown, the vehicle-mounted backlight module for improving corner dark area includes a lower frame 11, a light bar 12 and a light guide plate 13. The lower frame 11 includes a bottom plate 111 and a side frame 112, the bottom plate 111 is fixedly connected to the side frame 112 and forms a receiving cavity, the light bar 12 is fixedly connected to the side frame 112, and the light guide plate 13 is arranged in the receiving cavity. The light guide plate 13 includes a body 131 and a boss 132, and the boss 132 is fixedly connected to the body 131. It can be understood that the body 131 and the boss 132 are an integral structure. The light bar 12 includes a plurality of LED lamps 121 and a flexible circuit board 122, each LED lamp 121 is electrically connected to the flexible circuit board 122, the boss 132 abuts against or is connected to the flexible circuit board 122, and the LED lamp 121 is arranged between the bottom plate 111 and the boss 132 in the vertical direction, that is, the boss 132 is arranged on the side of the LED lamp 121 away from the bottom plate 111. In this embodiment, the light bar 12 is fixedly connected to the inner wall of the side frame 112 by means of heat-conducting double-sided adhesive tape.

[0031] The vehicle-mounted backlight module of the utility model abuts against or connects the boss 132 to the flexible circuit board 122, and the LED lamp 121 is arranged between the bottom plate 111 and the boss 132 in the vertical direction, that is, the boss 132 is arranged on the side of the LED lamp 121 away from the bottom plate 111. The arrangement of the boss 132 not only can avoid the phenomenon that the light-emitting area 101 of the light guide plate 13 appears corner dark area, guarantee the display effect, but also can effectively improve the abnormal phenomenon that the boss 132 is broken, and improve the quality of the vehicle-mounted backlight module.

[0032] Preferably, the boss 132 is provided with one, the boss 132 is a strip-shaped structure, the boss 132 is arranged along the length direction of the light guide plate 13, and the length of the boss 132 is greater than or equal to half the length of the light bar 12.

[0033] Preferably, the distance between the boss 132 and the LED lamp 121 is 0.3mm-1.0mm, preferably 0.3mm, 0.5mm, 0.7mm or 1.0mm, but is not limited thereto.

[0034] Preferably, the body 131 includes a light-out surface 1311 arranged on the side of the body 131 away from the bottom plate 111, the boss 132 includes oppositely arranged upper and lower surfaces 1321 and 1322, the lower surface 1322 is arranged close to the LED lamp 121, the distance between the upper surface 1321 and the bottom plate 111 is greater than the distance between the light-out surface 1311 and the bottom plate 111, and the light-out surface 1311 and the upper surface 1321 are connected through an arc surface, so as to avoid the phenomenon that the boss 132 is broken due to stress concentration when the vehicle-mounted backlight module vibrates.

[0035] In another preferred embodiment, as Figure 4As shown, the boss 132 comprises oppositely arranged upper surface 1321 and lower surface 1322, the lower surface 1322 is arranged close to the LED lamp 121, and the upper surface 1321 is located in the same horizontal plane as the light emitting surface 1311.

[0036] Preferably, the distance between the upper surface 1321 and the lower surface 1322 is 1.5mm-2.0mm, preferably 1.5mm, 1.8mm or 2.0mm, etc., to avoid the phenomenon of fracture of the boss 132 in the process of vibration of the vehicle-mounted backlight.

[0037] In another preferred embodiment, the boss 132 comprises an abutting surface 1323 fixedly connected between the upper surface 1321 and the lower surface 1322, and the abutting surface 1323 is fixedly connected with a flexible layer for avoiding damage to the flexible circuit board 122. The flexible layer is preferably a rubber layer or a silicone layer, but is not limited thereto.

[0038] As shown, Figure 6 The vehicle-mounted backlight module for improving the dark corner area further comprises a reflective film 14 and an optical film 15. The reflective film 14 is arranged on the bottom plate 111, the light guide plate 13 is arranged on the reflective film 14, and the optical film 15 is arranged on the light guide plate 13. The optical film 15 comprises a diffusion film 151, a light enhancement film 152 and a brightness enhancement film 153. The diffusion film 151 is arranged on the light guide plate 13, the light enhancement film 152 is arranged on the diffusion film 151, and the brightness enhancement film 153 is arranged on the light enhancement film 152. Among them, the diffusion film 151 is fixedly connected to the light guide plate 13 by double-sided adhesive, and the diffusion film 151, the light enhancement film 152 and the brightness enhancement film 153 can be fixedly connected by double-sided adhesive.

[0039] Preferably, the vehicle-mounted backlight module for improving the dark corner area further comprises a middle frame 16 fixedly connected with the lower frame 11.

[0040] Second embodiment

[0041] The vehicle-mounted backlight module for improving the dark corner area of the present embodiment is substantially the same as that of the first embodiment, and the difference lies in the structure of the boss 132.

[0042] Specifically, the boss 132 comprises a plurality of limiting sections 1324, and each limiting section 1324 is arranged at intervals. One limiting section 1324 is arranged corresponding to at least one LED lamp 121. In the present embodiment, the boss 132 comprises two limiting sections 1324, and the two limiting sections 1324 are arranged at intervals along the length direction of the body 131 of the light guide plate 13. The length of the limiting section 1324 is less than one half of the length of the lamp strip 12.

[0043] In another preferred embodiment, the convex block 132 comprises at least three limiting sections 1324, two limiting sections 1324 are arranged at intervals along the length direction of the body 131 of the light guide plate 13, and the length of the limiting section 1324 is less than one third of the length of the light bar 12.

[0044] In another preferred embodiment, as shown in Figure 5 the convex block 132 comprises a plurality of limiting sections 1324, each limiting section 1324 is arranged at intervals, and the length of each limiting section 1324 is equal to the length of each LED lamp 121.

[0045] In another preferred embodiment, the convex block 132 comprises a plurality of limiting sections 1324, each limiting section 1324 is arranged at intervals, and the length of each limiting section 1324 is equal to the distance between two adjacent LED lamps 121.

[0046] The utility model also relates to a kind of vehicle-mounted display devices, including the vehicle-mounted backlight module of the corner dark area improvement of above-mentioned.This utility model's vehicle-mounted display device is for example high-end vehicle-mounted instrument, vehicle-mounted central control display, vehicle-mounted driving recorder, vehicle-mounted DVD navigation, vehicle-mounted driving station integrated display screen or vehicle-mounted streaming media rearview mirror etc., but not limited to this.

[0047] The above is only the specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can easily think of the change or replacement within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the appended claims.

Claims

1. An in-vehicle backlight module for improving corner dark areas, characterized in that, The application relates to a lamp strip, which comprises a lower frame (11), a lamp strip (12) and a light guide plate (13), the lower frame (11) comprises a bottom plate (111) and a side frame (112), the bottom plate (111) is fixedly connected to the side frame (112) and forms a containing cavity, the lamp strip (12) is fixedly connected to the side frame (112), the light guide plate (13) is arranged in the containing cavity, the light guide plate (13) comprises a boss (132), the lamp strip (12) comprises a plurality of LED lamps (121) and a flexible circuit board (122), each LED lamp (121) is electrically connected to the flexible circuit board (122), the boss (132) abuts against or is connected to the flexible circuit board (122), and the LED lamps (121) are arranged between the bottom plate (111) and the boss (132) in the vertical direction.

2. The corner dark space improved in-vehicle backlight module of claim 1, wherein, The boss (132) is provided with one, and the boss (132) is arranged along the length direction of the light guide plate (13). Or the boss (132) comprises a plurality of limiting sections (1324), and each limiting section (1324) is arranged at intervals, and one limiting section (1324) is arranged in correspondence with at least one LED lamp (121).

3. The corner dark space improved in-vehicle backlight module of claim 2, wherein, The distance between the boss (132) and the LED lamp (121) is 0.3mm-1.0mm.

4. The corner dark room improving in-vehicle backlight module of claim 3, wherein, The light guide plate (13) comprises a body (131), the boss (132) is fixedly connected to the body (131), the body (131) comprises a light emitting surface (1311), the light emitting surface (1311) is arranged on the side of the body (131) away from the bottom plate (111), the boss (132) comprises oppositely arranged upper and lower surfaces (1321 and 1322), the lower surface (1322) is arranged close to the LED lamp (121), and the distance between the upper surface (1321) and the bottom plate (111) is greater than the distance between the light emitting surface (1311) and the bottom plate (111).

5. The corner dark space improvement on vehicle back light module as claimed in claim 4, wherein, The light emitting surface (1311) and the upper surface (1321) are connected through an arc surface.

6. The corner dark room improving in-vehicle backlight module of claim 3, wherein, The light guide plate (13) comprises a body (131), the boss (132) is fixedly connected to the body (131), the body (131) comprises a light emitting surface (1311), the light emitting surface (1311) is arranged on the side of the body (131) away from the bottom plate (111), the boss (132) comprises oppositely arranged upper and lower surfaces (1321 and 1322), the lower surface (1322) is arranged close to the LED lamp (121), and the upper surface (1321) and the light emitting surface (1311) are located in the same horizontal plane.

7. The in-vehicle backlight module for improving corner dark area according to claim 4 or 6, wherein, The distance between the upper surface (1321) and the lower surface (1322) is 1.5mm-2.0mm.

8. The in-vehicle backlight module for improving corner dark area according to claim 4 or 6, wherein, The boss (132) comprises an abutting surface (1323) fixedly connected between an upper surface (1321) and a lower surface (1322), and the abutting surface (1323) is fixedly connected with a flexible layer for avoiding damage to the flexible circuit board (122).

9. The corner dark room improving in-vehicle backlight module of claim 2, wherein, The vehicle-mounted backlight module for improving corner dark areas further comprises a reflective film (14) and an optical film (15), the reflective film (14) is arranged on the bottom plate (111), the light guide plate (13) is arranged on the reflective film (14), and the optical film (15) is arranged on the light guide plate (13).

10. A display device for a vehicle, characterized by comprising: The vehicle-mounted backlight module for improving corner dark areas comprises the improved vehicle-mounted backlight module for improving corner dark areas according to any one of claims 1 to 9.

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