Backlight module integrating camera and sensor and liquid crystal display device

Abstract

The utility model discloses a backlight module integrating a camera and a sensor, which comprises an assembly frame provided with a backlight assembly groove, a sensor assembly groove and a camera assembly hole, the sensor assembly groove is located outside the backlight assembly groove, and the camera assembly hole is located in the backlight assembly groove; the light-emitting component is assembled in the backlight assembling groove of the assembling frame; the front camera is assembled in the camera assembly hole of the assembly frame; and the light sensor is assembled in the sensor assembling groove of the assembling frame. The backlight module is integrated with the front camera and the light sensor, so that the frame width of the liquid crystal display device can be reduced. The utility model further discloses a liquid crystal display device which comprises the backlight module.

Description

Technical Field

[0001] The utility model relates to the display field, in particular to a backlight module and a liquid crystal display device integrating a camera and a sensor. Background Art

[0002] Existing liquid crystal display devices will respectively set a front camera and a light sensor near the LCD screen. The front camera is used for selfies or face recognition, and the optical fiber sensor is used to sense ambient light and automatically adjust the backlight brightness of the liquid crystal display device. At present, the LCD screen, the front camera and the light sensor are respectively attached to the glass cover plate during assembly, and then electrically connected to the control main board through their respective circuit boards. In order to avoid structural interference during assembly, sufficient gaps need to be reserved between the LCD screen, the front camera and the light sensor, which causes the frame of the liquid crystal display device to be too wide. Utility Model Content

[0003] In order to solve the above-mentioned deficiencies of the prior art, the utility model provides a backlight module, which integrates a front camera and a light sensor, and can reduce the border width of a liquid crystal display device.

[0004] The utility model also provides a liquid crystal display device, comprising the backlight module.

[0005] The technical problem to be solved by the utility model is achieved through the following technical solutions:

[0006] A backlight module integrating a camera and a sensor, comprising:

[0007] An assembly frame is provided with a backlight assembly slot, a sensor assembly slot and a camera assembly hole, wherein the sensor assembly slot is located outside the backlight assembly slot, and the camera assembly hole is located inside the backlight assembly slot;

[0008] A light emitting component is assembled in the backlight assembly groove of the assembly frame;

[0009] A front camera is mounted in the camera mounting hole of the mounting frame;

[0010] The light sensor is assembled in the sensor assembly groove of the assembly frame.

[0011] Furthermore, the light-emitting component includes a light strip, a light guide plate and at least one optical film, the light strip is mounted on the light incident surface of the light guide plate, and the at least one optical film is mounted on the light emitting surface of the light guide plate; the light guide plate is provided with an avoidance hole corresponding to the camera mounting hole.

[0012] Furthermore, the light strip includes light-emitting lamp beads and a light strip circuit board, one end of the light strip circuit board is located in the backlight assembly groove of the assembly frame, and the other end extends outside the assembly frame; the light-emitting lamp beads are welded to one end of the light strip circuit board located in the backlight assembly groove of the assembly frame.

[0013] Furthermore, the backlight module also includes a sensor circuit board, one end of which is located in the sensor assembly slot of the assembly frame, and the other end extends outside the assembly frame; the light sensor is welded to the end of the sensor circuit board located in the sensor assembly slot of the assembly frame.

[0014] Furthermore, the assembly frame includes a metal frame and a plastic frame, the plastic frame is assembled in the metal frame and surrounds the backlight assembly groove; the sensor assembly groove is opened in the frame edge of the plastic frame.

[0015] Furthermore, the metal frame includes a bottom plate, an outer side wall and an inner side wall, the camera assembly hole is opened on the bottom plate, the outer side wall is connected to the periphery of the bottom plate, and the inner side wall is connected to the periphery of the camera assembly hole; the rubber frame abuts against the outer side wall of the metal frame and exposes the bottom plate located in the backlight assembly groove and the sensor assembly groove; the light-emitting component and the light sensor are respectively assembled on the bottom plate located in the backlight assembly groove and the sensor assembly groove.

[0016] A liquid crystal display device, comprising:

[0017] A glass cover plate, comprising a display area and a frame area, wherein the frame area surrounds the display area, a light-shielding ink is disposed on the back of the frame area, and the light-shielding ink is provided with a first light-transmitting hole;

[0018] An LCD screen is mounted on the back of the glass cover plate, corresponding to the display area of ​​the glass cover plate, and is provided with a second light-transmitting hole;

[0019] The above-mentioned backlight module is assembled on the back of the LCD screen, the light-emitting component corresponds to the display area of ​​the glass cover, the light sensor corresponds to the first light-transmitting hole on the glass cover, and the front camera corresponds to the second light-transmitting hole of the LCD screen.

[0020] Furthermore, semi-transparent ink is provided in the first light-transmitting hole.

[0021] Furthermore, the LCD screen includes an upper polarizer, an upper substrate, a lower substrate and a lower polarizer which are stacked in sequence, the upper substrate and the lower substrate cover the sensor assembly groove and the camera assembly hole, and the upper polarizer and the lower polarizer avoid the light sensor located in the sensor assembly groove and the front camera located in the camera assembly hole.

[0022] Furthermore, the front camera is bonded and fixed on the lower substrate.

[0023] The utility model has the following beneficial effects: the backlight module of the utility model is integrated with a front camera and a light sensor, wherein the camera assembly hole for assembling the front camera is located in the backlight assembly groove, so that the front camera is located in the display area of ​​the liquid crystal display device after the whole machine is assembled, and the sensor assembly groove for assembling the light sensor is located outside the backlight assembly groove, so that the light sensor is located in the frame area of ​​the liquid crystal display device after the whole machine is assembled, and the front camera and the light sensor are assembled on the back of the LCD screen together with the backlight module when the whole machine is assembled, so that there is no need to reserve a gap between the front camera, the light sensor and the LCD screen on the display plane, and the frame width of the liquid crystal display device can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a stacking structure diagram of the backlight module provided by the utility model.

[0025] Figure 2 This is a stacking structure diagram of the liquid crystal display device provided by the utility model.

[0026] Figure 3 This is a front schematic diagram of a glass cover plate in a liquid crystal display device provided by the utility model. DETAILED DESCRIPTION

[0027] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, 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 intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 cannot be understood as a limitation on the present invention.

[0029] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Embodiment 1

[0032] like Figure 1 As shown, a backlight module integrating a camera and a sensor comprises:

[0033] The assembly frame 31 is provided with a backlight assembly slot 311, a sensor assembly slot 312 and a camera assembly hole 313, wherein the sensor assembly slot 312 is located outside the backlight assembly slot 311, and the camera assembly hole 313 is located inside the backlight assembly slot 311;

[0034] The light emitting component 32 is assembled in the backlight assembly groove 311 of the assembly frame 31;

[0035] A front camera 33 is mounted in a camera mounting hole 313 of the mounting frame 31;

[0036] The light sensor 34 is assembled in the sensor assembly slot 312 of the assembly frame 31 .

[0037] The backlight module of the utility model integrates a front camera 33 and a light sensor 34, wherein a camera assembly hole 313 for assembling the front camera 33 is located in the backlight assembly groove 311, so that the front camera 33 is located in the display area of ​​the liquid crystal display device after the whole machine is assembled, and a sensor assembly groove 312 for assembling the light sensor 34 is located outside the backlight assembly groove 311, so that the light sensor 34 is located in the frame area of ​​the liquid crystal display device after the whole machine is assembled. The front camera 33 and the light sensor 34 are assembled on the back of the LCD screen together with the backlight module during the whole machine assembly, so that there is no need to reserve a gap between the front camera 33, the light sensor 34 and the LCD screen on the display plane, which can reduce the frame width of the liquid crystal display device.

[0038] The light-emitting component 32 includes a light strip 321, a light guide plate 322 and at least one optical film 323. The light strip 321 is mounted on the light incident surface of the light guide plate 322, and the at least one optical film 323 is mounted on the light emitting surface of the light guide plate 322. The light guide plate 322 is provided with an avoidance hole corresponding to the camera assembly hole 313 for the front camera 33 to pass through during assembly.

[0039] In this embodiment, the at least one optical film 323 includes a diffusion film, a lower light enhancement film and an upper light enhancement film, and the diffusion film, the lower light enhancement film and the upper light enhancement film are sequentially mounted on the light emitting surface of the light guide plate 322; the light-emitting component 32 also includes a reflective sheet 324, and the reflective sheet 324 is mounted on the back side of the light guide plate 322 opposite to its light emitting surface, and is used to reflect the backlight emitted from the back side of the light guide plate 322 back into the light guide plate 322, so as to improve the backlight utilization rate.

[0040] The light strip 321 includes light-emitting lamp beads 325 and a light strip circuit board 326, one end of the light strip circuit board 326 is located in the backlight assembly groove 311 of the assembly frame 31, and the other end extends outside the assembly frame 31; the light-emitting lamp beads 325 are welded to one end of the light strip circuit board 326 located in the backlight assembly groove 311 of the assembly frame 31.

[0041] In this embodiment, the light emitting lamp beads 325 are LED lamp beads, and there are multiple of them, which are evenly spaced apart on one end of the light bar circuit board 326 located in the backlight assembly groove 311 of the assembly frame 31 .

[0042] The backlight module also includes a sensor circuit board 341, one end of which is located in the sensor assembly slot 312 of the assembly frame 31, and the other end extends outside the assembly frame 31; the light sensor 34 is welded to the end of the sensor circuit board 341 located in the sensor assembly slot 312 of the assembly frame 31.

[0043] Preferably, the light bar circuit board 326 and the sensor circuit board 341 are both flexible circuit boards. The flexible printed circuit board (FPC) is also called a "soft board" or a "flexible printed circuit board". It is a circuit board made of flexible materials (such as polyimide or polyester film) that can be bent, folded and twisted to adapt to different space and application requirements.

[0044] The utility model solders the light-emitting lamp beads 325 and the light sensor 34 to the light bar circuit board 326 and the sensor circuit board 341 respectively, so that the light-emitting lamp beads 325 and the light sensor 34 can be electrically connected to the control main board by bending the light bar circuit board 326 and the sensor circuit board 341 during assembly.

[0045] The assembly frame 31 includes a metal frame 314 and a plastic frame 315 . The plastic frame 315 is assembled in the metal frame 314 and surrounds the backlight assembly slot 311 . The sensor assembly slot 312 is opened in the frame edge of the plastic frame 315 .

[0046] In this embodiment, the metal frame 314 may be an iron frame, a stainless steel frame, an aluminum frame, etc., and the plastic frame 315 may be a polycarbonate frame, an acrylic frame, etc. The specific materials of the metal frame 314 and the plastic frame 315 are not limited.

[0047] The number and shape of the frame edges of the plastic frame 315 are determined according to the specific shape of the backlight module. For example, in a common rectangular backlight module, the plastic frame 315 has four linear frame edges, which correspond to the four sides of the rectangular backlight module respectively, and the four linear frame edges are connected end to end in sequence. In this case, the sensor assembly groove 312 can be opened on any linear frame edge of the plastic frame 315 (generally the upper linear frame edge); for another example, in a common circular backlight module, the plastic frame 315 has only one annular frame edge, which corresponds to the outer periphery of the circular backlight module. In this case, the sensor assembly groove 312 can be opened at any position of the annular frame edge of the plastic frame 315 (generally the upper end of the annular frame edge).

[0048] Preferably, the metal frame 314 includes a bottom plate 316, an outer side wall 317 and an inner side wall 318, the camera assembly hole 313 is opened on the bottom plate 316, the outer side wall 317 is connected to the periphery of the bottom plate 316, and the inner side wall 318 is connected to the periphery of the camera assembly hole 313 and extends into the avoidance hole of the light guide plate 322; the rubber frame 315 is against the outer side wall 317 of the metal frame 314, and the bottom plate 316 located in the backlight assembly groove 311 and the sensor assembly groove 312 is exposed; the light emitting component 32 and the light sensor 34 are respectively assembled on the bottom plate 316 located in the backlight assembly groove 311 and the sensor assembly groove 312 to improve the heat dissipation performance of the light emitting component 32 and the light sensor 34.

[0049] Embodiment 2

[0050] like Figure 2 and 3 As shown, a liquid crystal display device comprises:

[0051] The glass cover plate 1 comprises a display area 11 and a frame area 12, wherein the frame area 12 surrounds the display area 11, a light-shielding ink 13 is disposed on the back of the frame area 12, and the light-shielding ink 13 is provided with a first light-transmitting hole 14;

[0052] The LCD screen 2 is mounted on the back of the glass cover plate 1, corresponding to the display area 11 of the glass cover plate 1, and is provided with a second light transmission hole 21 and a third light transmission hole 22, wherein the third light transmission hole 22 corresponds to the first light transmission hole 14 on the glass cover plate 1;

[0053] The backlight module 3 described in Example 1 is installed on the back of the LCD screen 2, the light-emitting component 32 corresponds to the display area 11 of the glass cover 1, the light sensor 34 corresponds to the first light-transmitting hole 14 on the glass cover 1, and the front camera 33 corresponds to the second light-transmitting hole 21 of the LCD screen 2.

[0054] The liquid crystal display device of the present invention integrates the front camera 33 and the light sensor 34 in the backlight module 3. The front camera 33 and the light sensor 34 are assembled on the back of the LCD screen 2 together with the backlight module 3 when the whole device is assembled, wherein the front camera 33 is located in the display area 11 of the liquid crystal display device, and the light sensor 34 is located in the frame area 12 of the liquid crystal display device. In this way, there is no need to reserve a gap on the display plane between the front camera 33, the light sensor 34 and the LCD screen 2, and the frame width of the liquid crystal display device can be reduced.

[0055] In this embodiment, the LCD screen 2 is fixed to the back of the glass cover plate 1 by OCA optical glue 4, and the backlight module 3 is fixed to the back of the LCD screen 2 by a light-shielding tape 35 with a first hollow area 351, a second hollow area 352 and a third hollow area 353, wherein the first hollow area 351 corresponds to the light-emitting component 32 located in the backlight assembly groove 311, the second hollow area 352 corresponds to the front camera 33 located in the camera assembly hole 313, and the third hollow area 353 corresponds to the light sensor 34 located in the sensor assembly groove 312.

[0056] A main screen circuit board 27 is bound to one side of the LCD screen 2, and the light bar circuit board 326 of the light-emitting component 32 and the end of the sensor circuit board 341 of the light sensor 34 extending outside the assembly frame 31 are overlapped on the main screen circuit board 27. The main screen circuit board 27 is bent and electrically connected to a control main board (not shown in the figure) located on the back of the backlight module 3, and the light bar circuit board 326 and the sensor circuit board 341 are indirectly electrically connected to the control main board through the main screen circuit board 27.

[0057] In this embodiment, the main screen circuit board 27 is also a flexible circuit board.

[0058] A semi-transparent ink 15 is disposed in the first light-transmitting hole 14 to conceal the light sensor 34 and filter out ambient stray light.

[0059] In this embodiment, the semi-transparent ink 15 is an infrared cut-off ink to filter out infrared light in the ambient light to prevent the infrared light from affecting the sensing effect of the light sensor 34; the light-shielding ink 13 is black ink to improve the light-shielding effect.

[0060] The LCD screen 2 includes an upper polarizer 23, an upper substrate 24, a lower substrate 25 and a lower polarizer 26 which are stacked in sequence. The upper substrate 24 and the lower substrate 25 cover the sensor assembly groove 312 and the camera assembly hole 313. The upper polarizer 23 and the lower polarizer 26 avoid the light sensor 34 located in the sensor assembly groove 312 and the front camera 33 located in the camera assembly hole 313.

[0061] In this embodiment, the second light-transmitting hole 21 and the third light-transmitting hole 22 on the LCD screen 2 are blind holes, that is, the second light-transmitting hole 21 and the third light-transmitting hole 22 are formed only by opening the upper polarizer 23 and the lower polarizer 26 of the LCD screen 2, while retaining the integrity of the upper substrate 24 and the lower substrate 25. The front camera 33 is fixed to the lower substrate 25 by an annular light-shielding adhesive.

[0062] Of course, the second light-transmitting hole 21 and the third light-transmitting hole 22 can also be through holes, that is, they are formed by simultaneously opening holes in the upper polarizer 23, the upper substrate 24, the lower substrate 25 and the lower polarizer 26 of the LCD screen 2. At this time, the front camera 33 is fixed on the glass cover 1 by an annular light-shielding adhesive.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the utility model rather than to limit them. Although the embodiments of the utility model are described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the embodiments of the utility model can still be modified or replaced by equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A backlight module integrating a camera and a sensor, characterized in that: include: An assembly frame is provided with a backlight assembly slot, a sensor assembly slot and a camera assembly hole, wherein the sensor assembly slot is located outside the backlight assembly slot, and the camera assembly hole is located inside the backlight assembly slot; A light emitting component is assembled in the backlight assembly groove of the assembly frame; A front camera is mounted in the camera mounting hole of the mounting frame; The light sensor is assembled in the sensor assembly groove of the assembly frame.

2. The backlight module according to claim 1, characterized in that: The light-emitting component includes a light-emitting light bar, a light guide plate and at least one optical film. The light-emitting light bar is mounted on the light incident surface of the light guide plate, and the at least one optical film is mounted on the light emitting surface of the light guide plate. The light guide plate is provided with an avoidance hole corresponding to the camera mounting hole.

3. The backlight module according to claim 2, characterized in that: The light strip includes light beads and a light strip circuit board, one end of the light strip circuit board is located in the backlight assembly groove of the assembly frame, and the other end extends outside the assembly frame; the light beads are welded to the end of the light strip circuit board located in the backlight assembly groove of the assembly frame.

4. The backlight module according to claim 1, characterized in that: The backlight module also includes a sensor circuit board, one end of which is located in the sensor assembly slot of the assembly frame, and the other end extends outside the assembly frame; the light sensor is welded to the end of the sensor circuit board located in the sensor assembly slot of the assembly frame.

5. The backlight module according to claim 1, characterized in that: The assembly frame comprises a metal frame and a plastic frame. The plastic frame is assembled in the metal frame and surrounds the backlight assembly groove. The sensor assembly groove is arranged in the frame edge of the plastic frame.

6. The backlight module according to claim 5, characterized in that: The metal frame includes a bottom plate, an outer side wall and an inner side wall; the camera assembly hole is opened on the bottom plate, the outer side wall is connected to the periphery of the bottom plate, and the inner side wall is connected to the periphery of the camera assembly hole; the rubber frame abuts against the outer side wall of the metal frame and exposes the bottom plate located in the backlight assembly groove and the sensor assembly groove; the light emitting component and the light sensor are respectively assembled on the bottom plate located in the backlight assembly groove and the sensor assembly groove.

7. A liquid crystal display device, characterized in that: include: A glass cover plate, comprising a display area and a frame area, wherein the frame area surrounds the display area, a light-shielding ink is disposed on the back of the frame area, and the light-shielding ink is provided with a first light-transmitting hole; An LCD screen is mounted on the back of the glass cover plate, corresponding to the display area of ​​the glass cover plate, and is provided with a second light-transmitting hole; The backlight module described in claim 1 is mounted on the back of the LCD screen, the light-emitting component corresponds to the display area of ​​the glass cover, the light sensor corresponds to the first light-transmitting hole on the glass cover, and the front camera corresponds to the second light-transmitting hole of the LCD screen.

8. The liquid crystal display device according to claim 7, characterized in that: Semi-transparent ink is disposed in the first light-transmitting hole.

9. The liquid crystal display device according to claim 7, characterized in that: The LCD screen includes an upper polarizer, an upper substrate, a lower substrate and a lower polarizer which are stacked in sequence, the upper substrate and the lower substrate cover the sensor assembly slot and the camera assembly hole, and the upper polarizer and the lower polarizer avoid the light sensor in the sensor assembly slot and the front camera in the camera assembly hole.

10. The liquid crystal display device according to claim 9, characterized in that: The front camera is bonded and fixed on the lower substrate.

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