CN209803509U - Backlight module, display module and electronic equipment - Google Patents

Abstract

The utility model is suitable for an optics and electron technical field provide a backlight unit, and it includes light guide plate, reflector plate and blooming layer group. The light guide plate comprises a light-emitting surface and a bottom surface opposite to the light-emitting surface. The reflective sheet is disposed on the bottom surface of the light guide plate. The optical film layer group is arranged on the light emitting surface of the light guide plate. The backlight module is provided with at least one through hole penetrating through the light guide plate, the reflecting sheet and the optical film layer group. The aperture of the through hole formed in the light guide plate is the largest.

Description

Backlight module, display module and electronic equipment

Technical Field

The utility model belongs to the technical field of optics, especially, relate to a backlight module, display module assembly and electronic equipment.

Background

At present, consumers of electronic devices with display functions tend to pursue larger and larger screen occupation ratios in anticipation of experiencing the extreme visual enjoyment of full-screen display. However, the conventional electronic device often needs to further provide a plurality of different functional modules on one side of the display surface to implement other functions besides display, which occupies a display area. In order to improve the screen occupation ratio, the functional module needs to be arranged inside the screen, and the current display module structure has no redundant space for accommodating the functional module.

SUMMERY OF THE UTILITY MODEL

The utility model provides a backlight module, display module assembly and electronic equipment are in order to solve above-mentioned technical problem.

An embodiment of the utility model provides a backlight module, it includes light guide plate, reflector plate and blooming layer group. The light guide plate comprises a light-emitting surface and a bottom surface opposite to the light-emitting surface. The reflective sheet is disposed on the bottom surface of the light guide plate. The optical film layer group is arranged on the light emitting surface of the light guide plate. The backlight module is provided with at least one through hole penetrating through the light guide plate, the reflecting sheet and the optical film layer group. The aperture of the through hole formed in the light guide plate is larger than that of the through hole formed in the optical film layer group.

In some embodiments, the aperture of the through hole formed in the reflective sheet is equal to or smaller than the aperture of the through hole formed in the light guide plate.

In certain embodiments, the through-holes have a hole diameter in the range of 1 to 8 millimeters.

In some embodiments, the aperture difference between the through holes formed in the light guide plate and the through holes formed in the optical film layer group ranges from 100 to 400 micrometers.

In some embodiments, the optical film layer group includes a diffusion sheet and a brightness enhancement sheet, the diffusion sheet is disposed on the light exit surface of the light guide plate, and the brightness enhancement sheet is disposed on the light exit side of the diffusion sheet.

In some embodiments, the inner side surface of the through hole formed in the light guide plate is plated with a light shielding film layer.

In some embodiments, the backlight module further comprises a backlight source disposed on one side of the light guide plate.

In some embodiments, the backlight module further includes at least one functional module and at least one light supplement light source, the functional module and the light supplement light source share a light path which is formed by corresponding through holes and penetrates through the backlight module, the light supplement light source emits light supplement light rays to enter corresponding through holes to supplement backlight, and the functional module emits or receives light beams through corresponding through holes to achieve corresponding functions.

In some embodiments, the functional module is used for two-dimensional or three-dimensional object feature recognition, or/and for two-dimensional or three-dimensional image rendering, or/and for taking pictures and shooting images, or/and for realizing distance sensing, or/and for realizing proximity sensing, or/and for realizing ambient light sensing.

The utility model discloses embodiment provides a display module assembly, it includes the backlight unit that liquid crystal display panel and above-mentioned embodiment provided.

An embodiment of the present invention provides an electronic device, which includes at least one display module provided by the above embodiment.

The utility model discloses backlight unit, display module assembly and electronic equipment that embodiment provided set up functional module through seting up the through-hole that runs through backlight unit to it is shaded to correspond the through-hole setting light filling light source, thereby can hide the positive functional module of original setting at the panel in the screen below under the prerequisite that does not influence the complete demonstration of screen, further improve the screen and account for than, realize real comprehensive screen display.

Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the invention.

Drawings

Fig. 1 is a schematic structural diagram of a backlight module according to a first embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a backlight module according to a second embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a backlight module according to a third embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a backlight module according to a fourth embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a backlight module according to a fifth embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a backlight module according to a sixth embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a backlight module according to a seventh embodiment of the present invention.

Fig. 8 is a schematic structural diagram of a backlight module according to an eighth embodiment of the present invention.

Fig. 9 is a schematic structural diagram of a backlight module according to a ninth embodiment of the present invention.

Fig. 10 is a schematic structural diagram of a display module according to a tenth embodiment of the present invention.

Fig. 11 is a schematic structural diagram of an electronic device according to an eleventh embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention. In the description of the present invention, it is to be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any order or number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; either mechanically or electrically or in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship or combination of two or more elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, only the components and settings of a specific example are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, which are intended in order to facilitate and clarify the invention, and in no event is it intended that any particular relationship between the various embodiments and/or configurations discussed herein be so repeated. In addition, the various specific processes and materials provided in the following description of the present invention are only examples for implementing the technical solution of the present invention, but one of ordinary skill in the art should recognize that the technical solution of the present invention can also be implemented by other processes and/or other materials not described below.

Further, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention may be practiced without one or more of the specific details, or with other structures, components, and so forth. In other instances, well-known structures or operations are not shown or described in detail to avoid obscuring aspects of the invention.

As shown in fig. 1, the first embodiment of the present invention provides a backlight module 1 for correspondingly setting one or more functional modules under a screen to increase the display area and increase the ratio of the screen without affecting the original function. The backlight module 1 includes a backlight source 10, a light guide plate 12, a reflective sheet 14 and an optical film layer group 16. The light guide plate 12 includes a light emitting surface 120, a bottom surface 122 opposite to the light emitting surface 120, and a light incident surface 124. The backlight source 10 is disposed corresponding to the light incident surface 124. The reflective sheet 14 is disposed on the bottom surface 122 of the light guide plate 12. The optical film layer group 16 is disposed on the light emitting surface 120 of the light guide plate 12. The backlight module 1 is provided with a through hole 18 penetrating through the light guide plate 12, the reflector plate 14 and the optical film layer group 16. The through holes 18 respectively formed in the light guide plate 12, the reflective sheet 14 and the optical film layer group 16 are aligned with each other to form a light path penetrating through the whole backlight module 1. The alignment of the through holes 18 may be that the centers of the through holes 18 are aligned with each other, or that the centers of the through holes 18 are not exactly aligned and have a certain deviation, but the through holes 18 are still through. Wherein, the size of the through hole 18 opened on the light guide plate 12 is the largest. The size of the through-hole 18 may be measured by the area of the through-hole 18 or the diameter of the through-hole 18. For example: the size of the through hole 18 on the reflective sheet 14 is equal to or smaller than the size of the through hole 18 on the light guide plate 12, that is, the area of the through hole 18 on the reflective sheet 14 is equal to or smaller than the area of the through hole 18 on the light guide plate 12 or the aperture of the through hole 18 on the reflective sheet 14 is equal to or smaller than the aperture of the through hole 18 on the light guide plate 12.

It is to be understood that the present invention is described with the positional relationship of the respective members being such that the backlight emitting direction is up, and the reverse is down. For example: with the light guide plate 12 as a reference, the reflective sheet 14 is disposed on the side of the light guide plate 12 opposite to the backlight emitting direction, and the reflective sheet 14 is considered to be located below the light guide plate 12. The optical film layer group 16 is disposed on one side of the light guide plate 12 along the backlight emitting direction, and the optical film layer group 16 is considered to be located above the light guide plate 12.

The light emitted from the backlight source 10 enters the light guide plate 12 through the light incident surface 124. The light guide plate 12 is used for guiding the incident backlight light to the light emitting surface 120 and emitting the backlight light from the light emitting surface 120.

The reflective sheet 14 is disposed on the bottom surface 122 side of the light guide plate 12. The reflective sheet 12 is made of a high-reflectivity material and is used for reflecting the backlight light back to the light emitting surface 120 to improve the utilization rate of the backlight light. The through hole 18 is correspondingly formed on the reflector plate 14. The through holes 18 of the reflective sheet 14 may have the same size as the through holes 18 of the light guide plate 12, or may be smaller than the through holes 18 of the light guide plate 18.

In the present embodiment, the reflective sheet 14 is a separate member from the light guide plate 12. It is understood that, in other embodiments, the reflective sheet 14 may be replaced by a film structure with high emissivity formed on the bottom surface 122 of the light guide plate 12, for example, by a coating process.

The optical film layer set 16 includes, but is not limited to, a diffuser 160 and a brightness enhancement film 162. The diffusion sheet 160 is disposed on the light emitting surface 120 of the light guide plate 12, and is used for diffusing the light emitted from the light guide plate 12 to widen the viewing angle and conceal the pattern formed on the light guide plate 12. The brightness enhancement sheet 162 may be, but is not limited to, one or more prism sheets. The brightness enhancement film 162 is disposed on the light emitting side of the diffusion film 160 for converging the backlight light within a certain angle to improve the backlight brightness. The through holes 18 respectively formed in the diffusion sheet 160 and the brightness enhancement sheet 162 have the same size, that is, the entire optical film group 16 is formed with through holes 18 of uniform size. The through hole 18 formed in the light guide plate 12 below the diffusion sheet 160 has the largest area of the through hole 18, the periphery of the through hole 18 on the light guide plate 12 is extended outward by a preset dimension D along the center of the through hole 18 relative to the periphery of the through hole 18 on the diffusion sheet 160, so that a circle of step structure is formed along the periphery of the through hole 18, and the lower surface 1600 of the diffusion sheet 160 exposed in the through hole 18 on the light guide plate 12 forms the step surface of the step structure.

The aperture range of the through holes 18 formed in the light guide plate 12, the reflective sheet 14 and the optical film layer group 16 is 1 to 8 millimeters (mm). The aperture difference between the through hole 18 formed in the light guide plate 12 and the through hole 18 formed in the optical film group 16 is in a range of 100 to 400 micrometers (μm), that is, the predetermined dimension D of the periphery of the through hole 18 in the light guide plate 12, which is outward extended along the center of the through hole 12 with respect to the periphery of the through hole 18 in the diffusion sheet 160, is in a range of 100 to 400 micrometers (μm).

The through holes 18 correspondingly formed in the light guide plate 12, the reflective sheet 14 and the optical film layer group 16 may have any shape, for example, a circular shape, a rectangular shape, an oval shape, or other irregular shapes, and are not limited in particular. The through hole 18 may be formed at any position of the backlight module 1, for example, at the center or edge of the backlight module 1, and is not limited herein. In the present embodiment, the through-hole 18 has a circular shape.

As shown in fig. 2, the second embodiment of the present invention provides a backlight module 2, which has a structure substantially the same as the backlight module 1 of the first embodiment, and is mainly different in that a light shielding member 25 is disposed on an inner side surface 226 of a through hole 28 formed in the light guide plate 22. The light shielding member 25 is used to shield the backlight light in the light guide plate 22 from entering the light path formed by the through holes 28. In the present embodiment, the light blocking member 25 is a light blocking film layer plated on the inner surface 226 of the through hole 28 formed in the light guide plate 22. The light blocking film layer 25 is made of an opaque material or a highly reflective material, and is used to prevent the backlight light propagating in the light guide plate 22 from leaking through the inner side 226 of the through hole 28 of the light guide plate 22 to show an aperture corresponding to the shape of the through hole 28.

As shown in fig. 3, a third embodiment of the present invention provides a backlight module 3, which has a structure substantially the same as the backlight module 1 of the first embodiment, and mainly includes a frame 37. The material of the frame 37 may be plastic or metal, and is not limited in particular. The overall shape and size of the frame 37 are the same as those of the other layers of the backlight module 3. The frame 37 is also provided with corresponding through holes 38. The center of the through hole 38 in the frame 37 is aligned with the center of the through hole 38 formed in each of the light guide plate 32, the reflective sheet 34, and the optical film layer group 36. The size of the through hole 38 in the frame 37 is larger than the size of the through hole 38 in the optical film layer group 36 and smaller than the size of the through hole 38 formed in the light guide plate 32 and the reflection plate 34. A retaining wall 370 extends vertically upwards from the periphery of the through hole 38 of the frame body 37. A light shielding layer B is formed outside the retaining wall 370 to serve as the light shielding member 25 of the light guide plate 32. The height of the retaining wall 370 is substantially equal to the sum of the thicknesses of the light guide plate 32 and the reflective sheet 34. The frame 37 is assembled below the reflection sheet 34. The retaining wall 370 extends into the through hole 38 of the light guide plate 32 and the reflective sheet 34. The retaining wall 370 is provided with a ring of resilient sealing ring 3702 at the periphery of the top end 3700 of the body remote from the frame 37. When the frame 37 is assembled on the reflector 34, the retaining wall 370 extends into the through hole 38 of the light guide plate 32 and the reflector 34, and the elastic sealing ring 3702 abuts against the lower surface 3600 at the periphery of the through hole 38 of the diffuser 360 to prevent the backlight in the light guide plate 32 from leaking.

In some embodiments, the elastomeric seal 3702 may also be omitted.

It is understood that, in other embodiments, the frame body 370 is made of a material having a high reflectivity or the inner surface of the frame body 370 is formed into a film structure having a high emissivity, for example, by a coating process, so that it may be directly combined with the light guide plate 32 instead of the reflective sheet 34. At this time, the height of the retaining wall 370 is the thickness of the light guide plate 34.

As shown in fig. 4, a backlight module 4 according to a fourth embodiment of the present invention has a structure substantially the same as that of the backlight module 3 according to the third embodiment, and is mainly different in that a circle of light shielding film layer 45 is formed on a lower surface 4600 of the diffusion sheet 460 adjacent to the light guide plate 42 along the periphery of the through hole 48 of the diffusion sheet 460 instead of the elastic sealing ring 3702 at the top end 3700 of the retaining wall 370 as the light shielding member 45 in the third embodiment. The top end 4700 of the retaining wall 470 of the frame 47 is attached to the light shielding film 45 after extending into the through hole 48 in the light guide plate 42 and/or the reflective sheet 44 to prevent the backlight in the light guide plate 42 from leaking.

As shown in fig. 5, a fifth embodiment of the present invention provides a backlight module 5, which has a structure substantially the same as the backlight module 1 of the first embodiment, and mainly includes at least one light supplement light source 53. The light supplementing light source 53 is arranged corresponding to a light passing path formed by the through hole 58 penetrating through the backlight module 5, so as to supplement the backlight missing of the area corresponding to the through hole 58, so that the area corresponding to the through hole 58 can be normally displayed, and the real full-screen display is realized.

The supplementary light source 53 is disposed below the reflector 54 to emit supplementary light to the through hole 58, so that the supplementary light is in the same direction as the backlight light emitted from the light emitting surface 520 of the light guide plate 52. Because the through hole 58 formed in the light guide plate 52 has the largest size, a circle of lower surfaces 5600 of the diffusion sheets 560 above the light guide plate is exposed, so that the supplementary light rays emitted by the supplementary light source 53 can directly irradiate part of the lower surfaces 5600 of the diffusion sheets 56 exposed in the through hole 58 of the light guide plate 52.

Because the fill-in light and the backlight light are emitted by different light sources, the respective brightness of the fill-in light and the backlight light is different, so that an obvious area boundary is formed on the display effect. The above-described distinct region boundary is eliminated by providing the through-hole 58 having a larger size in the light guide plate 52 so that the luminance of the region where the diffusion sheet 56 faces the lower surface 5600 of the through-hole 58 of the light guide plate 52 exposed to the diffusion sheet 560 gradually changes to the luminance of the region where the through-hole 58 of the diffusion sheet 560 faces.

The number of the through holes 58 formed in the backlight module 5 may be one, two, or more, and is not limited herein, for example, but not limited thereto, the number of the functional modules (not shown) may be set according to the requirement under the screen. Each through hole 58 opened in the backlight module 5 is, for example but not limited to, correspondingly provided with at least one light supplement light source 53 to supplement backlight. In the present embodiment, the backlight module 5 has two through holes 58, namely a first through hole 580 and a second through hole 582, penetrating through the backlight module. Correspondingly, the backlight module 5 includes a first supplementary light source 530 and a second supplementary light source 532 for supplementing light to the first through hole 580 and the second through hole 582, respectively.

It can be understood that the light supplement light emitted by the light supplement light source 53 can directly enter the through hole 58 penetrating through the backlight module 5, and can also pass through the optical device 57, for example: a prism or an optical film having a half-transmitting and half-reflecting characteristic, a secondary light guide plate, etc., and then enter the through hole 58 penetrating the backlight module 5.

In some modified embodiments, for example, a supplementary light source is disposed below one through hole 58, and a functional module is disposed below another through hole 58. For example, a transmitting module of the function module may be provided below one through hole 58, and a receiving module of the function module may be provided below the other through hole 58. Of course, the transmitting module and the light-compensating light source of the functional module can be arranged below one through hole 58, and the receiving module of the functional module can be arranged below the other through hole 58.

As shown in fig. 6, a sixth embodiment of the present invention provides a backlight module 6, which has a structure substantially the same as the backlight module 5 of the fifth embodiment, and the main difference is that the backlight module 6 further includes a functional module 69 correspondingly disposed through the through hole 68 of the backlight module 6. The functional module 69 realizes corresponding functions through a light path formed by the through hole 69. The functional module 69 includes but is not limited to a fingerprint sensing light emitting module, a three-dimensional sensing light emitting module, a fingerprint identification chip module, a three-dimensional sensing identification module, a color camera module, a distance sensor, a proximity sensor, an ambient light sensor, etc. The functional module 69 may be disposed right below the corresponding through hole 68, or may be disposed beside the corresponding through hole 68 so as not to face the through hole 68. The functional module 69 shares a light path penetrating through the backlight module 6 with the light supplement light source 63 through an optical device and a corresponding through hole 68. The function module 69 transmits or receives light beams through the corresponding through holes 68 to realize corresponding functions. For example: if the functional module 69 is a fingerprint sensing light emitting module or a three-dimensional sensing light emitting module, the emitted light beams for sensing pass through the backlight module 6 through the through hole 68, and then are emitted to an external object through a liquid crystal display panel (not shown) for sensing. If the functional module 69 is a fingerprint identification chip module, a three-dimensional sensing identification module or a color camera module, light beams reflected by an external object pass through the backlight module 1 through the corresponding through holes 68 and are received by the functional module 69, and then images are formed and can be used for fingerprint identification, three-dimensional identification of faces, three-dimensional modeling, photographing, video and the like. The light beam may be visible or non-visible, such as: infrared or near infrared, and the like. In addition, the functional module 69 can also be used for sensing the distance of an external object, or sensing whether the external object approaches, or sensing the intensity of ambient light, etc.

In this embodiment, the backlight module 6 is provided with a first through hole 680 and a second through hole 682 penetrating through the backlight module, and the backlight module 6 includes a three-dimensional sensing light emitting module 690 disposed corresponding to the first through hole 680, a first light supplement light source 630, a first optical component 571, and a three-dimensional sensing identification module 692, a second light supplement light source 632, and a second optical component 572 disposed corresponding to the second through hole 682. The three-dimensional sensing light emitting module 690 and the first light supplementing light source 630 share a light path penetrating the backlight module 6, which is formed by the first through hole 680 and the first optical component 571. The three-dimensional sensing and identifying module 692 and the second fill-in light source share a light path penetrating through the backlight module 6, which is formed by the second through hole 682 shared by the second optical assembly 572.

The first light supplement light source 630 is disposed below the backlight module 6 at a position opposite to the first through hole 680, and is configured to emit visible light to supplement backlight of an area corresponding to the first through hole 680. The three-dimensional sensing light emitting module 690 is disposed beside the first through hole 680 near one side of the reflector 64, and is used for emitting near infrared light to an external object to form a predetermined sensing pattern for sensing. The first optical element 571 has a half-transmitting and half-reflecting function, and in this embodiment, the first optical element 571 transmits visible light and reflects near-infrared light. The three-dimensional sensing light emitting module 690 emits a near infrared light beam, which is reflected by the first optical component 571 and then enters the first through hole 680 to be emitted. The light supplement light emitted from the first light supplement light source 630 enters the first through hole 680 through the first optical element 571 to supplement the backlight.

The second light supplement light source 632 is disposed below the backlight module 6 at a position opposite to the second through hole 682, and is configured to emit visible light to supplement backlight of an area corresponding to the second through hole 682. The three-dimensional sensing and recognizing module 692 is disposed beside the second through hole 682 near the side of the reflective sheet 64 for receiving the light beam reflected by the external object to form an image of the sensing pattern on the external object. The second optical member 572 has a transflective function, and in this embodiment, the second optical member 572 transmits visible light and reflects near-infrared light. The light beam reflected by the external object passes through the backlight module 6 via the second through hole 682, and is reflected by the second optical assembly 572 to be received by the three-dimensional sensing and recognizing module 692. The fill-in light emitted by the second fill-in light source 632 is transmitted by the second optical component 572 and enters the second through hole 682 to fill in the backlight.

Alternatively, in some embodiments, the first optical component 571 or/and the second optical component 572 can also be transmissive to infrared light and reflective to visible light, for example. Accordingly, the first supplementary lighting source 630 and the three-dimensional sensing light emitting module 690 are exchanged in position, or/and the second supplementary lighting source 632 and the three-dimensional sensing identification module 692 are exchanged in position. Alternatively, the number of the through holes 68 may be one, for example, only the first through hole 680 is included, and the second through hole 682 is omitted. Correspondingly, the first fill-in light source 630 is disposed beside the through hole 68 near the reflector 64, the three-dimensional sensing light emitting module 690 and the three-dimensional sensing identification module 692 are disposed below the first optical element 571, and the first optical element 571 reflects visible light and transmits near infrared light. Of course, other various modifications based on the technical idea of the present invention should fall into the protection scope of the present invention.

As shown in fig. 7, the seventh embodiment of the present invention provides a backlight module 7, which has a structure substantially the same as the backlight module 6 of the sixth embodiment, and the main difference is that the brightness of the backlight source 70 and the brightness of the at least one light supplement light source 73 can be independently adjusted.

The backlight module 7 includes a backlight driving circuit 700 connected to the backlight source 70 and a backlight controller 702. The backlight module 7 independently controls the brightness of the backlight source 70 through a backlight controller 702 and a backlight driving circuit 700. The backlight module 7 further includes a light supplement driving circuit 730 and a light supplement controller 732 respectively corresponding to each light supplement light source 73. The backlight module 7 controls each light supplement light source 73 independently through the light supplement driving circuit 730 and the light supplement controller 732.

It can be understood that if the function module 79 and the light supplement light source 73 disposed corresponding to the through hole 78 of the same backlight module 7 cannot work simultaneously, the controller 790 of the function module 79 needs to be associated with the light supplement controller 730 or the light supplement driving circuit 732 to turn off the corresponding light supplement light source 73 when the function module 79 is started. For example: the color camera module 79 and the light supplement light source 73 are disposed corresponding to the through hole 78 of the same backlight module 73, and the light supplement light emitted by the light supplement light source 73 affects the imaging of the color camera module 79, so that when the color camera module 79 is ready to start working, the corresponding light supplement light source 73 needs to be turned off by sending a signal to the light supplement controller 730 or the light supplement driving circuit 732 through the corresponding controller 790.

Of course, it is possible to change, in some modified embodiments, the functional module 79 and the light supplement light source 73 which are disposed corresponding to the through hole 78 of the same backlight module 7 may also operate simultaneously.

As shown in fig. 8, an eighth embodiment of the present invention provides a backlight module 8, which has a structure substantially the same as the backlight module 6 of the sixth embodiment, and the main difference is that the luminances of the backlight source 80 and the at least one light supplement light source 83 are adjusted in a correlated manner.

The backlight module 8 includes a backlight driving circuit 800 connected to the backlight source 80, a light supplement driving circuit 830 connected to the light supplement light source 83, and a light source controller 810 connected to the backlight driving circuit 800 and the light supplement driving circuit 830, respectively. By measuring the brightness change condition of the original backlight light directly emitted by the backlight source 80 after being lost through the light guide plate 82 and the optical film group 86, the brightness change condition is used as the brightness to be achieved by the light supplement light directly emitted by the light supplement light source 83, so that the numerical relationship between the light emitting brightness of the backlight source 80 and the light emitting brightness of the light supplement light source 83 can be determined, and the numerical relationship between the backlight drive current and the light supplement drive current can be determined according to the respective electrical characteristics of the backlight source 80 and the light supplement light source 83. The light source controller 810 adjusts the luminance of the backlight source 80 and the luminance of the at least one light supplement light source 83 in a correlated manner according to a preset numerical relationship between the backlight driving current and the light supplement driving current, that is, when a user adjusts the luminance of the backlight source 80, the luminance of the light supplement light source 83 is also adjusted in a correlated manner according to the preset luminance relationship, so as to ensure that the display area corresponding to the backlight source 80 and the display area corresponding to the light supplement light source 83 keep consistent and uniform display luminance. The difference between the brightness of the light emitted by the backlight source 80 after passing through the light guide plate 82 and the optical film group 86 and the brightness of the light emitted by the fill light source 83 after passing through the through hole 88 is less than or equal to 10%.

It can be understood that if the function module 89 and the light supplement light source 83 corresponding to the through hole 88 of the same backlight module 8 cannot work simultaneously, the controller 890 of the function module 89 needs to be associated with the light source controller 810 or the light supplement driving circuit 830 to turn off the corresponding light supplement light source 830 when the function module 89 is started. For example: the color camera module 89 and the light supplement light source 83 that correspond the setting of the through hole 88 of the same backlight module 8, the light supplement light that the light supplement light source 83 sent can cause the influence to the formation of image of the color camera module 89, so when the color camera module 89 prepares to begin working, the light source controller 810 or the light supplement drive circuit 830 of the light supplement light source 83 need be given through the controller 890 that corresponds to send a signal and close the corresponding light supplement light source 83.

Of course, it is possible to change, in some modified embodiments, the functional module 89 and the light supplement light source 83 which are disposed corresponding to the through hole 88 of the same backlight module 8 may also operate simultaneously.

As shown in fig. 9, the ninth embodiment of the present invention provides a backlight module 9, which has a structure substantially the same as the backlight module 3 of the third embodiment, and the main difference is that the retaining wall 970 of the frame 97 penetrates through the whole backlight module 9, i.e. the retaining wall respectively penetrates through the through holes 98 of the reflecting sheet 94, the light guide plate 92 and the optical film layer group 96. A circle of light shielding film layer 95 is arranged on the surface of one side of the optical film layer group 96 away from the light guide plate 92 at the periphery of the through hole 98 of the optical film layer group 96. The light shielding film 95 is used to shield the backlight light emitted from the periphery of the through hole 98 to avoid forming a distinct circle corresponding to the shape of the through hole 98 in the display area.

As shown in fig. 10, a tenth embodiment of the present invention provides a display module 100, which includes a display panel 90 and the backlight module 1-9 provided in any one of the first to ninth embodiments. The display panel 90 is, for example, but not limited to, a liquid crystal display panel.

The lcd panel 90 includes, but is not limited to, a first substrate (not shown), a thin film transistor array circuit (not shown) disposed on the first substrate, a second substrate (not shown), a liquid crystal layer (not shown) disposed between the first substrate and the second substrate, an upper polarizer (not shown), a lower polarizer (not shown), a color filter (not shown), and a protective cover (not shown). The backlight module 1-9 provides backlight illumination. The liquid crystal display panel 90 modulates the transmitted backlight according to the content to be displayed to realize display.

In addition, when the function module is arranged below the backlight module, the function module can receive or/and emit light beams through the through holes in the backlight module and the display panel, so that the function of sensing image information of an external object or/and sensing biological characteristic information of the external object is realized, and the function of identifying the external object is realized.

Specifically, the function module compares the sensed biological characteristic information with pre-stored sample information, identifies the biological characteristic information of the external object according to the comparison result, and confirms whether the identity of the external object is legal or not. Such as, but not limited to, fingerprint feature information, facial feature information, blood oxygen information, and the like. The sample information is for example biometric information of one or more samples. Blood oxygen information is used, for example, to determine whether an external object is a living body.

As shown in fig. 11, a tenth embodiment of the present invention provides an electronic device 110, such as but not limited to a mobile phone, a notebook computer, a tablet computer, etc. The electronic device 110 includes the backlight module 1 provided in any one of the first to ninth embodiments or the display module 100 provided in the tenth embodiment.

Compared with the prior art, the utility model provides a backlight unit, display module assembly and electronic equipment set up the function module through seting up the through-hole that runs through backlight unit to it supplements backlight to set up the light filling light source to correspond the through-hole, thereby can hide the original setting in the positive function module of panel below the screen under the prerequisite that does not influence the complete demonstration of screen, further improve the screen and account for the ratio, realize real comprehensive screen display.

In the description herein, references to the description of the terms "one embodiment," "certain embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and all modifications, equivalents, improvements and the like that are made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. The utility model provides a backlight module, its characterized in that, includes light guide plate, reflector plate and blooming layer group, the light guide plate includes goes out the plain noodles and the relative bottom surface of plain noodles, the reflector plate sets up in bottom surface one side of light guide plate, blooming layer group sets up in the plain noodles one side of light guide plate, set up on backlight module and run through light guide plate, reflector plate and blooming layer group's through-hole, wherein, the aperture of seting up the through-hole on the light guide plate is greater than on the blooming layer group the aperture of seting up the through-hole.

2. The backlight module as claimed in claim 1, wherein the aperture of the through hole formed on the reflector plate is equal to or smaller than the aperture of the through hole formed on the light guide plate.

3. The backlight module as claimed in claim 1, wherein the aperture of the through hole is in a range of 1 to 8 mm.

4. The backlight module as claimed in claim 1, wherein the aperture difference between the through holes formed in the light guide plate and the through holes formed in the optical film layer group is in a range of 100 to 400 μm.

5. The backlight module as claimed in claim 1, wherein the optical film layer set comprises a diffuser and a brightness enhancement film, the diffuser is disposed on the light-emitting surface of the light guide plate, and the brightness enhancement film is disposed on the light-emitting side of the diffuser.

6. The backlight module of claim 1, wherein: and a shading part is arranged on the inner side surface of the through hole formed in the light guide plate.

7. The backlight module according to any of claims 1-6, wherein: the backlight module is characterized by further comprising a function module and a light supplementing light source, the function module and the light supplementing light source correspond to a light passing path which is formed by the through holes and penetrates through the backlight module, the light supplementing light source sends supplementing light rays to enter the corresponding through holes to supplement backlight, and the function module transmits or receives light beams through the corresponding through holes to achieve corresponding functions.

8. The backlight module of claim 7, wherein: the functional module is used for two-dimensional or three-dimensional object feature recognition, or/and is used for two-dimensional or three-dimensional image drawing, or/and is used for photographing and shooting, or/and is used for realizing distance sensing, or/and is used for realizing proximity sensing, or/and is used for realizing ambient light sensing.

9. A display module comprising a liquid crystal display panel and the backlight module according to any one of claims 1 to 8.

10. An electronic device, comprising at least one display module according to claim 9.