Vehicle-mounted circular instrument backlight source, display device and automobile

Abstract

The utility model relates to the technical field of vehicle-mounted circular instrument backlight sources, and particularly provides a vehicle-mounted circular instrument backlight source, a display device and an automobile, and the vehicle-mounted circular instrument backlight source comprises rubber iron, an LED lamp panel, a diffusion plate, a lower brightness enhancement film, an upper brightness enhancement film and a diffusion film which are sequentially arranged from bottom to top, and annular shading glue annularly arranged on the periphery of the diffusion film; the LED lamp panel comprises an FPC (Flexible Printed Circuit) substrate and a plurality of LED chips arranged on the FPC substrate; the plastic iron, the LED lamp panel, the diffusion plate, the lower brightness enhancement film, the upper brightness enhancement film and the diffusion film are coaxially arranged, and pointer round holes are formed in the axis of the plastic iron, the axis of the LED lamp panel, the axis of the diffusion plate, the axis of the lower brightness enhancement film, the axis of the upper brightness enhancement film and the axis of the diffusion film. Light emitted by the LED chips enters the diffusion plate through the end face, deviating from the lower brightness enhancement film, of the diffusion plate. The problem that the brightness display of the backlight source of the vehicle-mounted circular instrument is not uniform due to the pointer circular hole is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle-mounted circular instrument backlights, in particular to a vehicle-mounted circular instrument backlight, a display device and a vehicle. BACKGROUND

[0002] Due to the limitation of the structure of the vehicle-mounted circular instrument backlight module, there is a design pointer circular hole in the middle of the vehicle-mounted circular instrument backlight, which causes the light to be unable to pass through the circular hole and reach the area behind the circular hole, resulting in the tail part of the circular hole away from the light source being dark due to the lack of light, and there is a bright line near the light source end in front of the circular hole, causing the brightness of the backlight to be different before and after the circular hole, and the display of the backlight is uneven.

[0003] Therefore, the prior art has defects and deficiencies, and needs to be further improved and developed. CONTENT OF THE UTILITY MODEL

[0004] In view of the deficiencies of the prior art, the present application aims to provide a vehicle-mounted circular instrument backlight, a display device and a vehicle, which aims to solve the problem of uneven brightness before and after the pointer circular hole of the vehicle-mounted circular instrument backlight in the prior art, and uneven brightness display of the vehicle-mounted circular instrument backlight.

[0005] The technical scheme adopted by the present application to solve the technical problems is as follows: a vehicle-mounted circular instrument backlight, comprising:

[0006] A glue iron, an LED lamp plate, a diffusion plate, a lower light enhancement sheet, an upper light enhancement sheet and a diffusion sheet are sequentially arranged from bottom to top, and a ring-shaped light shielding glue is arranged around the outer periphery of the diffusion sheet;

[0007] The LED lamp plate comprises an FPC substrate and a plurality of LED chips arranged on the FPC substrate; the glue iron, the LED lamp plate, the diffusion plate, the lower light enhancement sheet, the upper light enhancement sheet and the diffusion sheet are coaxially arranged, and a pointer circular hole is formed at the center of the axis of the glue iron, the LED lamp plate, the diffusion plate, the lower light enhancement sheet, the upper light enhancement sheet and the diffusion sheet, and the FPC substrate is not provided with the LED chips opposite the pointer circular hole.

[0008] Optionally, the glue iron comprises:

[0009] An iron frame, the iron frame has an integrally formed bottom plate and an outer side plate, and the outer side plate is vertically arranged at the edge of the bottom plate;

[0010] A glue frame, the glue frame is arranged on the inner surface of the outer side plate facing the outer side plate.

[0011] Optionally, the iron frame further comprises:

[0012] An inner side plate is arranged at the pointer hole on the bottom plate and extends to the diffusion sheet in the height direction, and the pointer holes on the LED lamp plate, diffusion plate, lower light enhancement sheet, upper light enhancement sheet and diffusion sheet are all sleeved on the inner side plate.

[0013] Optionally, a first light-reflecting coating is arranged on the end face of the inner side plate facing the outer side plate.

[0014] Optionally, a plurality of first circumferential limiting portions are uniformly and spacedly arranged on the outer side plate, and a plurality of second circumferential limiting portions are correspondingly arranged on the rubber frame; the plurality of second circumferential limiting portions and the plurality of first circumferential limiting portions are correspondingly clamped, for limiting the outer side plate and the rubber frame in the circumferential direction.

[0015] Optionally, a film material limiting step is further arranged on the rubber frame at the position corresponding to the second circumferential limiting portion, and a clamping limiting portion is arranged on the diffusion plate, lower light enhancement sheet, upper light enhancement sheet and diffusion sheet at the position corresponding to the film material limiting step, and the clamping limiting portion is clamped with the film material limiting step.

[0016] Optionally, a second light-reflecting coating is arranged on the diffusion plate, lower light enhancement sheet, upper light enhancement sheet and diffusion sheet at the position of the pointer hole.

[0017] Another technical solution adopted by the present application to solve the technical problem is as follows: a display device comprising the vehicle-mounted circular instrument backlight source as described above.

[0018] Another technical solution adopted by the present application to solve the technical problem is as follows: an automobile comprising the vehicle-mounted circular instrument backlight source as described above.

[0019] Beneficial effects:

[0020] The vehicle-mounted circular instrument backlight source, display device and automobile provided in the present application can effectively avoid the problem of uneven brightness display of the vehicle-mounted circular instrument backlight source caused by the pointer hole by arranging an LED lamp plate below the diffusion plate and controlling the light emitted by the plurality of LED chips to enter the diffusion plate through the end face of the diffusion plate facing away from the lower light enhancement sheet, uniformly diffusing the light emitted by the LED through the diffusion plate, thereby effectively avoiding the bright edge or bright line defects in the peripheral viewing area of the vehicle-mounted circular instrument backlight source; and more LED chips can be arranged, thereby reducing the working current of a single LED chip and prolonging the service life of the instrument backlight source. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a partial structure top view of the vehicle-mounted circular instrument backlight source provided in the present application;

[0022] Figure 2is a bottom view schematic diagram of the vehicle-mounted circular instrument backlight provided in the present application;

[0023] Figure 3 is a radial section view schematic diagram of the vehicle-mounted circular instrument backlight provided in the present application;

[0024] Figure 4 is a Figure 3 enlarged schematic diagram of A part in the present application;

[0025] Figure 5 is a Figure 3 enlarged schematic diagram of B part in the present application;

[0026] Figure 6 is a preferred variant structure schematic diagram of the present application; Figure 5

[0027] Explanation of reference signs:

[0028] 10, vehicle-mounted circular instrument backlight; 11, glue iron; 12, LED lamp plate; 13, diffusion plate; 14, lower light enhancement sheet; 15, upper light enhancement sheet; 16, diffusion sheet; 17, annular light shielding glue; 18, pointer circular hole; 191, clamping limiting part; 192, second light reflection coating; 121, FPC substrate; 122, LED chip; 111, iron frame; 112, glue frame; 113, inner side plate; 114, first light reflection coating; 1111, bottom plate; 1112, outer side plate; 1113, first circumferential limiting part; 1121, second circumferential limiting part; 1122, film material limiting step. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the present application more clear and definite, the present application is further described in detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application, and are not used to limit the present application.

[0030] ​In the description of the application, it needs to be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can be explicitly or implicitly included one or more. In the description of the application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0031] In the description of the application, it needs to be understood that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0032] Please refer to Figures 1 to 6 The first embodiment of the application provides a vehicle-mounted circular instrument backlight 10, which can be used on various cars; the vehicle-mounted circular instrument backlight 10 comprises, from bottom to top, a glue iron 11, an LED lamp plate 12, a diffusion plate 13, a lower light enhancement sheet 14, an upper light enhancement sheet 15 and a diffusion sheet 16, and a ring-shaped light shielding glue 17 arranged at the outer periphery of the diffusion sheet 16; wherein the LED lamp plate 12 comprises an FPC substrate 121 and a plurality of LED chips 122 arranged on the FPC substrate 121; the glue iron 11, the LED lamp plate 12, the diffusion plate 13, the lower light enhancement sheet 14, the upper light enhancement sheet 15 and the diffusion sheet 16 are coaxially arranged, and the glue iron 11, the LED lamp plate 12, the diffusion plate 13, the lower light enhancement sheet 14, the upper light enhancement sheet 15 and the diffusion sheet 16 are coaxially arranged. The shaft of the glue iron 11, the LED lamp plate 12, the diffusion plate 13, the lower light enhancement sheet 14, the upper light enhancement sheet 15 and the diffusion sheet 16 are provided with a pointer circular hole 18; the light emitted by the plurality of LED chips 122 enters the diffusion plate 13 through the end face of the diffusion plate 13 away from the lower light enhancement sheet 14.

[0033] It can be known that by arranging the LED lamp plate 12 below the diffusion plate 13 and controlling the light emitted by the plurality of LED chips 122 to enter the diffusion plate 13 from the end face of the diffusion plate 13 away from the lower light-increasing sheet 14, the light emitted by the LED is uniformly diffused by the diffusion plate 13, thereby effectively avoiding the problem of uneven brightness display of the vehicle-mounted circular instrument backlight 10 caused by the pointer circular hole 18; at the same time, it can also avoid the appearance of bright edges or bright lines in the viewing area around the vehicle-mounted circular instrument backlight 10; and more LED chips 122 can be arranged, thereby reducing the working current of a single LED chip 122 and prolonging the service life of the instrument backlight.

[0034] In some embodiments, the glue iron 11 includes an iron frame 111 and a glue frame 112; the iron frame 111 has an integrally formed bottom plate 1111 and an outer side plate 1112, the outer side plate 1112 is vertically arranged at the edge of the bottom plate 1111; the glue frame 112 is arranged on the inner surface of the outer side plate 1112 facing the outer side plate 1112. Through the cooperation of the iron frame 111 and the glue frame 112, the LED lamp plate 12, the diffusion plate 13, the lower light-increasing sheet 14, the upper light-increasing sheet 15, the diffusion sheet 16 and the annular light-shielding glue 17 are effectively supported; and the LED lamp plate 12, the diffusion plate 13, the lower light-increasing sheet 14, the upper light-increasing sheet 15 and the diffusion sheet 16 are effectively protected by arranging the glue frame 112.

[0035] In some embodiments, the iron frame 111 further includes an inner side plate 113, the inner side plate 113 is arranged at the pointer circular hole 18 on the bottom plate 1111 and extends to the diffusion sheet 16 in the height direction, and the pointer circular holes 18 on the LED lamp plate 12, the diffusion plate 13, the lower light-increasing sheet 14, the upper light-increasing sheet 15 and the diffusion sheet 16 are all sleeved on the inner side plate 113. In turn, the pointer circular hole 18 part is effectively protected, which prevents dust from entering each film material through the pointer circular hole 18, prevents the pointer component from wearing each film material, and prevents light leakage at the pointer circular hole 18.

[0036] In some embodiments, a first light-reflecting coating 114 is arranged on the end face of the outer side plate 1112 facing the outer side plate 1112, thereby effectively preventing light leakage at the pointer circular hole 18.

[0037] In some embodiments, a plurality of first circumferential limiting portions 1113 are uniformly and spacedly arranged on the outer side plate 1112, and the glue frame 112 is correspondingly provided with a plurality of second circumferential limiting portions 1121; the plurality of second circumferential limiting portions 1121 and the plurality of first circumferential limiting portions 1113 are one-to-one correspondingly connected, for limiting the outer side plate 1112 and the glue frame 112 in the circumferential direction; and the structural strength of the glue iron 11 is effectively guaranteed.

[0038] In some embodiments, the glue frame 112 is further provided with a film material limiting step 1122 at the position corresponding to the second circumferential limiting part 1121, the diffusion plate 13, the lower light enhancement sheet 14, the upper light enhancement sheet 15 and the diffusion sheet 16 are all provided with a clamping limiting part 191 at the position corresponding to the film material limiting step 1122, and the clamping limiting part 191 clamps with the film material limiting step 1122; the structural strength and stability of the vehicle-mounted circular instrument backlight 10 are effectively improved, and displacement of each film material is prevented.

[0039] In some embodiments, the diffusion plate 13, the lower light enhancement sheet 14, the upper light enhancement sheet 15 and the diffusion sheet 16 are all provided with a second light reflection coating 192 at the position of the pointer circular hole 18, so as to effectively prevent light leakage at the position of the pointer circular hole 18.

[0040] In the second embodiment of the present application, a display device is further provided, which comprises the vehicle-mounted circular instrument backlight 10 as described in the first embodiment of the present application; so as to effectively ensure uniform brightness display of the circular instrument display interface and ensure the display effect.

[0041] In the third embodiment of the present application, an automobile is further provided, which comprises the vehicle-mounted circular instrument backlight 10 as described in the first embodiment of the present application; so as to effectively ensure the display effect of the circular instrument of the automobile.

[0042] In summary, the vehicle-mounted circular instrument backlight, the display device and the automobile provided in the present application comprise: a glue iron, an LED lamp plate, a diffusion plate, a lower light enhancement sheet, an upper light enhancement sheet and a diffusion sheet arranged in sequence from bottom to top, and a ring-shaped light shielding glue arranged at the outer periphery of the diffusion sheet; wherein the LED lamp plate comprises an FPC substrate and a plurality of LED chips arranged on the FPC substrate; the glue iron, the LED lamp plate, the diffusion plate, the lower light enhancement sheet, the upper light enhancement sheet and the diffusion sheet are coaxially arranged, and a pointer circular hole is formed at the center of the axis of the glue iron, the LED lamp plate, the diffusion plate, the lower light enhancement sheet, the upper light enhancement sheet and the diffusion sheet; the light emitted by the plurality of LED chips enters the diffusion plate through the end face of the diffusion plate away from the lower light enhancement sheet. By arranging the LED lamp plate below the diffusion plate and controlling the light emitted by the plurality of LED chips to enter the diffusion plate through the end face of the diffusion plate away from the lower light enhancement sheet, the light emitted by the LED is uniformly diffused through the diffusion plate, so as to effectively avoid the problem of uneven brightness display of the vehicle-mounted circular instrument backlight caused by the pointer circular hole; at the same time, the bright edge or bright line defects in the peripheral viewing area of the vehicle-mounted circular instrument backlight can also be avoided; and more LED chips can be arranged, so as to reduce the working current of a single LED chip and prolong the service life of the instrument backlight.

[0043] It should be understood that the application is not limited to the examples described above, which can be modified or transformed by a person of ordinary skill in the art in light of the above description, all these modifications and transformations being intended to belong to the scope of protection of the claims appended to the application.

Claims

1. A circular instrument backlight source for a vehicle, characterized in that: Comprise: Glue iron, LED lamp plate, diffusion plate, lower light enhancement sheet, upper light enhancement sheet and diffusion sheet are arranged from bottom to top in turn, and annular light shielding glue is arranged at the outer periphery of the diffusion sheet; Wherein, the LED lamp plate comprises FPC substrate and a plurality of LED chips arranged on the FPC substrate; the glue iron, LED lamp plate, diffusion plate, lower light enhancement sheet, upper light enhancement sheet and diffusion sheet are coaxially arranged, and the pointer circular hole is arranged at the center of the glue iron, LED lamp plate, diffusion plate, lower light enhancement sheet, upper light enhancement sheet and diffusion sheet; the light emitted by the plurality of LED chips enters the diffusion plate through the end face of the diffusion plate away from the lower light enhancement sheet.

2. The back light for a circular instrument panel for a vehicle according to claim 1, wherein The glue iron comprises: Iron frame, the iron frame has an integral bottom plate and outer side plate, the outer side plate is vertically arranged at the edge of the bottom plate; Glue frame, the glue frame is arranged on the inner surface of the outer side plate facing the outer side plate.

3. The back light for a circular instrument panel for a vehicle according to claim 2, wherein The iron frame further comprises: Inner side plate, the inner side plate is arranged at the pointer circular hole on the bottom plate and extends to the diffusion sheet in the height direction, and the pointer circular hole on the LED lamp plate, diffusion plate, lower light enhancement sheet, upper light enhancement sheet and diffusion sheet is sleeved on the inner side plate.

4. The back light for a circular instrument panel for a vehicle according to claim 3, wherein The end face of the inner side plate facing the outer side plate is provided with a first light reflection coating.

5. The back light for a circular instrument panel for a vehicle according to claim 2, wherein A plurality of first circumferential limiting parts are uniformly and interval arranged on the outer side plate, and a plurality of second circumferential limiting parts are correspondingly arranged on the glue frame; a plurality of second circumferential limiting parts and a plurality of first circumferential limiting parts are one-to-one correspondingly connected, for limiting the outer side plate and the glue frame in the circumferential direction.

6. The back light for a circular instrument panel for a vehicle according to claim 5, wherein The glue frame is further provided with a film material limiting step at the position corresponding to the second circumferential limiting part, and the diffusion plate, lower light enhancement sheet, upper light enhancement sheet and diffusion sheet are provided with a clamping limiting part corresponding to the film material limiting step, and the clamping limiting part is clamped with the film material limiting step.

7. A backlight for a circular instrument cluster for a vehicle according to any one of claims 1 to 6, wherein, The diffusion plate, lower light enhancement sheet, upper light enhancement sheet and diffusion sheet are provided with a second light reflection coating at the position of the pointer circular hole.

8. A display device, characterized by comprising: The vehicle-mounted circular instrument back light source comprises the vehicle-mounted circular instrument back light source according to any one of claims 1-7.

9. An automobile characterized by comprising: The vehicle-mounted circular instrument back light source comprises the vehicle-mounted circular instrument back light source according to any one of claims 1-7.

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