CN215265339U - Backlight module for preventing display screen from being black and vehicle-mounted display device - Google Patents
Backlight module for preventing display screen from being black and vehicle-mounted display device Download PDFInfo
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- CN215265339U CN215265339U CN202121084431.2U CN202121084431U CN215265339U CN 215265339 U CN215265339 U CN 215265339U CN 202121084431 U CN202121084431 U CN 202121084431U CN 215265339 U CN215265339 U CN 215265339U
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Abstract
The utility model provides a prevent backlight unit of display screen black screen, includes light guide plate and flexible circuit board, and the light guide plate is including going into the light side, goes into the light side including a plurality of income light areas that arrange in proper order along the length direction or the width direction of light guide plate, and flexible circuit board sets up with going into the light side relatively, and the last electric connection of flexible circuit board has a plurality of light source groups, and each light source group corresponds the setting with each income light area, and each light source group includes a plurality of light sources that connect in parallel each other. In view of this, the utility model discloses a prevent that backlight unit of display screen black screen can not appear the large tracts of land black screen phenomenon. The utility model discloses still relate to an on-vehicle display device.
Description
Technical Field
The utility model relates to a display screen technical field, in particular to prevent backlight unit and vehicle-mounted display device of display screen black screen.
Background
At present, the multi-screen development of the automobile display screen brings new opportunities for the development of panel enterprises, panel manufacturers seize the market segment of automobile display in succession, the market potential of the automobile terminal in China is huge, the development prospect is wide, the market demand of the automobile display is directly driven, the requirement of the automobile display screen on the aspect of optical function display is strict, the requirement of uneven black screen on the luminous effect of an automobile backlight is strict, and the unreasonable design of the automobile backlight line is also one of the most common problems of uneven luminescence.
Fig. 1 is a schematic structural diagram of a backlight module in the prior art when a fault occurs, as shown in fig. 1, a conventional vehicle-mounted backlight includes a circuit board 21 and a plurality of light sources 22 electrically connected to the circuit board 21, the plurality of light sources 22 are divided into a first light source region 23, a second light source region 24, a third light source region 25 and a fourth light source region 26, lines among the first light source region 23, the second light source region 24, the third light source region 25 and the fourth light source region 26 are arranged in parallel, and the light sources 22 are arranged in series, when a line of one of the light source regions is disconnected or opened, a group of lights are easily turned off or opened, which causes a dark area 27 in the middle of a vehicle-mounted display screen to appear, that is, a phenomenon that a black screen appears in a part of a display screen 28 of the backlight module directly affects the driving safety of a driver.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model discloses a prevent that backlight unit of display screen black screen can not appear the large tracts of land black screen phenomenon.
The utility model provides a prevent backlight unit of display screen black screen, includes light guide plate and flexible circuit board, and the light guide plate is including going into the light side, goes into the light side including a plurality of income light areas that arrange in proper order along the length direction or the width direction of light guide plate, and flexible circuit board sets up with going into the light side relatively, and the last electric connection of flexible circuit board has a plurality of light source groups, and each light source group corresponds the setting with each income light area, and each light source group includes a plurality of light sources that connect in parallel each other.
The utility model discloses in, above-mentioned each light source group arranges in proper order along the length direction of flexible circuit board, and the length direction of a plurality of light sources along the flexible circuit board of each light source group separates the setting each other.
The utility model discloses in, a plurality of light sources of above-mentioned light source group include first light source, second light source, third light source and fourth light source, and the first light source of each light source group establishes ties each other, and the second light source of each light source group establishes ties each other, and the third light source of each light source group establishes ties each other, and the fourth light source of each light source group establishes ties each other.
The utility model discloses in, above-mentioned each light source group sets up in parallel each other.
The utility model discloses in, the quantity that above-mentioned goes into the light zone is more than or equal to 3, and the quantity of light source group is more than or equal to 3 groups.
In the present invention, the number of the light sources of each light source group is greater than or equal to 4.
The utility model discloses in, above-mentioned light source is the LED lamp.
The utility model discloses in, above-mentioned backlight unit who prevents black screen of display screen includes iron frame and center down, and the iron frame includes the side frame down, and flexible circuit board fixes on the side frame, through fixture block and draw-in groove fixed connection between center and the side frame.
The utility model discloses in, above-mentioned backlight unit who prevents the black screen of display screen still includes reflectance coating and optics diaphragm, reflectance coating fixed connection in bottom plate, on the reflectance coating was located to the light guide plate, optics diaphragm was located on the light guide plate.
The utility model discloses still relate to an on-vehicle display device, including foretell backlight unit who prevents the display screen black screen.
The utility model discloses a prevent that backlight unit of display screen black screen will correspond the parallelly connected setting of the light source group of setting with going into the light zone, when a set of circuit disconnection or open a way, other light sources alternately give out light, and the phenomenon of large tracts of land black screen can not appear in backlight unit, only has a small part region to be the dark space, can not influence backlight unit's use, has not only improved the quality of product, has improved navigating mate's safe driving simultaneously and has experienced.
Drawings
Fig. 1 is a schematic structural diagram of a backlight module in a failure state in the prior art.
Fig. 2 is a schematic structural diagram of the backlight module for preventing black screen display of the display screen according to the present invention.
Fig. 3 is a schematic structural diagram of the light source circuit arrangement of the backlight module for preventing the display screen from being blacked.
Fig. 4 is a schematic view of the split structure of the backlight module for preventing the display screen from being blacked.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In order to facilitate understanding of those skilled in the art, the present application provides a specific implementation process of the technical solution provided by the present application through the following embodiments.
Fig. 2 is the utility model discloses a prevent structural schematic diagram when backlight unit of display screen black screen breaks down, fig. 3 is the utility model discloses a prevent structural schematic diagram of backlight unit's of display screen black screen light source line arrangement, fig. 4 is the utility model discloses a prevent split structural schematic diagram of backlight unit of display screen black screen, as fig. 2, fig. 3 and fig. 4 are shown, prevent that backlight unit of display screen black screen from including light guide plate 11 and flexible circuit board 12, light guide plate 11 is including going into the light side, go into the light side including a plurality of light areas of going into that arrange in proper order along light guide plate 11's length direction or width direction, flexible circuit board 12 sets up with going into the light side relatively, the electric connection has a plurality of light source group 13 on the flexible circuit board 12, each light source group 13 corresponds the setting with each light area of going into, and each light source group 13 includes a plurality of light sources that connect in parallel each other.
The utility model discloses a prevent that backlight unit of display screen black screen will correspond the parallelly connected setting of light source in the light source group 13 that sets up with going into the light zone, when a set of circuit disconnection or open a way, other light sources alternately give out light, and the phenomenon of large tracts of land black screen can not appear in backlight unit's display screen 18, and only the small part fault area is dark space 19, can not influence backlight unit's use, has not only improved the quality of product, has improved navigating mate's safe driving experience simultaneously.
Further, each light source group 13 is sequentially arranged along the length direction of the flexible circuit board 12, and the plurality of light sources of each light source group 13 are arranged at intervals along the length direction of the flexible circuit board 12. In this embodiment, the light sources are equally spaced.
Further, the plurality of light sources of the light source group 13 includes a first light source 131, a second light source 132, a third light source 133 and a fourth light source 134, the first light sources 131 of the light source groups 13 are connected in series, the second light sources 132 of the light source groups 13 are connected in series, the third light sources 133 of the light source groups 13 are connected in series, and the fourth light sources 134 of the light source groups 13 are connected in series.
Further, the light source groups 13 are arranged in parallel with each other. In this embodiment, when one of the light source lines of one light source group 13 is disconnected or opened, other light sources emit light as usual, and only the display screen 18 of the backlight module generates a dark area, so that a large-area black screen of the backlight module is not generated, and the driving safety experience of drivers is improved.
Further, the number of light incident areas is greater than or equal to 3, and the number of light source groups 13 is greater than or equal to 3. In the present embodiment, the number of light incident regions is, for example, 3, 4, 5, 6, 7, etc., preferably, the number of light incident regions is 7, the number of light source groups 13 is, for example, 3, 4, 5, 6, 7, etc., preferably, the number of light source groups 13 is 4, but not limited thereto.
Further, the number of light sources of each light source group 13 is greater than or equal to 4. In the present embodiment, the number of light sources of each light source group 13 is, for example, 3, 4, 5, 6 or 7, and preferably, the number of light sources of each light source group 13 is 7, but not limited thereto.
Further, the light source is an LED lamp. In this embodiment, the first light source 131 has, for example, 7 LED lamps, the second light source 132 has, for example, 7 LED lamps, the third light source 133 has, for example, 7 LED lamps, and the fourth light source 134 has, for example, 7 LED lamps, but not limited thereto; as shown in fig. 2, for example, when the circuit of the second light source 132 is disconnected or opened, the second light source 132 of each light source group 13 does not emit light, and the non-light emitting light source may have a plurality of dark regions 19 on the display screen of the backlight module, because the first light source 131, the third light source 133 and the fourth light source 134 are further disposed around the second light source 132, the first light source 131, the third light source 133 and the fourth light source 134 continue to emit light in a crossed manner, so that the display screen 18 of the backlight module does not have a large area black screen phenomenon.
As shown in fig. 4, the backlight module for preventing the display screen from being blacked includes a lower iron frame 14 and a middle frame 15, the lower iron frame 14 includes a side frame, the flexible circuit board 12 is fixed on the side frame, and the middle frame 15 and the side frame are fixedly connected through a clamping block and a clamping groove. In this embodiment, the flexible circuit board 12 is disposed along the long axis direction of the side frame, the flexible circuit board 12 is attached to the side frame through the heat conducting glue, and the heat dissipated by the flexible circuit board 12 is dissipated through the heat conducting glue.
Furthermore, the backlight module for preventing the display screen from being blacked also comprises a reflecting film 16 and an optical film 17, wherein the reflecting film 16 is fixedly connected to the bottom plate, the light guide plate 11 is arranged on the reflecting film 16, and the optical film 17 is arranged on the light guide plate 11. In this embodiment, the reflective film 16 is adhered to the bottom plate by an adhesive tape, the optical film 17 includes a diffusion film 171, a lower brightness enhancement film 172, an upper brightness enhancement film 173 and a brightness enhancement film 174, the diffusion film 171 is fixedly adhered to the light guide plate 11 by an adhesive tape, the lower brightness enhancement film 172 is fixedly adhered to the diffusion film 171 by an adhesive tape, the upper brightness enhancement film 173 is fixedly adhered to the lower brightness enhancement film 172 by an adhesive tape, the brightness enhancement film 174 is fixedly adhered to the brightness enhancement film by an adhesive tape, and the adhesive tape is, for example, a double-sided tape, but not limited thereto.
The utility model discloses still relate to an on-vehicle display device, including foretell backlight unit who prevents the display screen black screen. In this embodiment, the backlight module for preventing the display screen from being blacked is mainly applied to a vehicle-mounted automobile data recorder, a vehicle-mounted DVD navigation, a P-DVD, a GPS navigator, a vehicle-mounted industrial control and navigator, industrial control medical equipment, a digital photo frame and the like; the on-vehicle display device is, for example, but not limited to, an instrument display screen, a head-up display screen, a center control display screen, a rear seat entertainment display screen, and the like.
The utility model discloses not be limited to the specific details among the above-mentioned embodiment the utility model discloses a within the technical idea scope, can be right the technical scheme of the utility model carry out multiple simple variant, these simple variants all belong to the utility model discloses a protection scope. The various features described in the foregoing detailed description may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations.
Claims (10)
1. The utility model provides a prevent backlight unit of display screen black screen, its characterized in that includes light guide plate (11) and flexible circuit board (12), light guide plate (11) are including going into the light side, it includes along a plurality of income light regions that length direction or width direction of light guide plate (11) arranged in proper order to go into the light side, flexible circuit board (12) with it sets up relatively to go into the light side, electric connection has a plurality of light source group (13) on flexible circuit board (12), each light source group (13) and each go into the light region and correspond the setting, and each light source group (13) includes a plurality of light sources that connect in parallel each other.
2. The backlight module for preventing the display screen from being blacked as claimed in claim 1, wherein the light source groups (13) are sequentially arranged along the length direction of the flexible circuit board (12), and the plurality of light sources of the light source groups (13) are arranged at intervals along the length direction of the flexible circuit board (12).
3. The backlight module for preventing the black screen of the display screen as claimed in claim 2, wherein the plurality of light sources of the light source group (13) comprises a first light source (131), a second light source (132), a third light source (133) and a fourth light source (134), the first light sources (131) of the light source groups (13) are connected in series, the second light sources (132) of the light source groups (13) are connected in series, the third light sources (133) of the light source groups (13) are connected in series, and the fourth light sources (134) of the light source groups (13) are connected in series.
4. The backlight module for preventing the display screen from being blacked as claimed in claim 2, wherein the light source groups (13) are arranged in parallel with each other.
5. The backlight module for preventing the display screen from being blacked out as set forth in claim 1, wherein the number of the light incident areas is greater than or equal to 3, and the number of the light source groups (13) is greater than or equal to 3.
6. The backlight module for preventing the display screen from being blacked as claimed in claim 1, wherein the number of the light sources of each light source group (13) is greater than or equal to 4.
7. The backlight module for preventing the display screen from being blacked as claimed in claim 1, wherein the light source is an LED lamp.
8. The backlight module for preventing the display screen from being blacked as claimed in claim 1, wherein the backlight module for preventing the display screen from being blacked comprises a lower iron frame (14) and a middle frame (15), the lower iron frame (14) comprises a side frame, the flexible circuit board (12) is fixed on the side frame, and the middle frame (15) is fixedly connected with the side frame through a clamping block and a clamping groove.
9. The backlight module for preventing the display screen from being blacked as claimed in claim 8, wherein the backlight module for preventing the display screen from being blacked further comprises a reflective film (16) and an optical film (17), the reflective film (16) is fixedly connected to the bottom plate, the light guide plate (11) is disposed on the reflective film (16), and the optical film (17) is disposed on the light guide plate (11).
10. An on-vehicle display device, characterized in that, include any one of claim 1 to 9 prevent the backlight module of the black screen of display screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121084431.2U CN215265339U (en) | 2021-05-19 | 2021-05-19 | Backlight module for preventing display screen from being black and vehicle-mounted display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121084431.2U CN215265339U (en) | 2021-05-19 | 2021-05-19 | Backlight module for preventing display screen from being black and vehicle-mounted display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215265339U true CN215265339U (en) | 2021-12-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121084431.2U Active CN215265339U (en) | 2021-05-19 | 2021-05-19 | Backlight module for preventing display screen from being black and vehicle-mounted display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215265339U (en) |
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2021
- 2021-05-19 CN CN202121084431.2U patent/CN215265339U/en active Active
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