WO2020155512A1

WO2020155512A1 - Backlight module, in-screen optical fingerprint system, display module, and electronic device

Info

Publication number: WO2020155512A1
Application number: PCT/CN2019/090570
Authority: WO
Inventors: 张胜斌
Original assignee: 深圳市汇顶科技股份有限公司
Priority date: 2019-01-31
Filing date: 2019-06-10
Publication date: 2020-08-06
Also published as: CN111801677A; CN109937378A; WO2020155038A1; CN210155481U

Abstract

Provided are a backlight module, an in-screen optical fingerprint system, a display module, and an electronic device. The backlight module is immediately adjacent to a liquid crystal panel, and comprises a light source assembly and a light guide assembly arranged adjacently. The light guide assembly comprises a first light guide portion and a second light guide portion. In a vertical direction of the liquid crystal panel, a minimum spacing between any position of the second light guide portion and the liquid crystal panel is less than a minimum spacing between any position of the first light guide portion and the liquid crystal panel. The first light guide portion is provided with multiple first light homogenization structures. The second light guide portion is provided with multiple second light homogenization structures. The first light homogenization structures and the second light homogenization structures are used to achieve uniform brightness of light rays of the light source assembly reaching the liquid crystal panel after having respectively passed through the first light guide portion and the second light guide portion. The present invention uses the first light homogenization structures and the second light homogenization structures to prevent an attenuation level difference between light passing through the first light guide portion from the light source assembly and light passing through the second light guide portion from the light source assembly from causing uneven brightness of emergent light from the liquid crystal panel.

Description

Backlight module, under-screen optical fingerprint system, display module and electronic device

This application requires an international patent to be submitted to the Chinese Patent Office on January 31, 2019, the application number is PCT/CN2019/074231, and the invention title is "a backlight module, display module, under-screen optical fingerprint system and electronic device". The priority of the application, the entire content of which is incorporated in this application by reference.

Technical field

The present invention relates to the field of display technology, in particular to a backlight module, an under-screen optical fingerprint system, a display module and an electronic device.

Background technique

Liquid crystal display (LCD) has many advantages such as thin body, power saving, and no radiation, and is widely used in electronic products such as TVs, computers, and mobile phones. The LCD display is a passive light-emitting display. The display itself does not emit light, but is illuminated by the backlight module behind the display. The display panel is usually arranged in parallel with the liquid crystal panel and the backlight module and tightly secured by black glue. The backlight module includes a light source and a light guide module connected to the light source, and the height of the light source and the light guide module are the same, so that the backlight module is a high plane, and the light from the light source passes through the light guide module After processing, it is emitted and irradiated uniformly on the liquid crystal display panel, so that the display panel displays patterns. With the development of display technology, additional functions such as fingerprint recognition have gradually been widely used in display devices, and display panels with functions such as fingerprint recognition have also been extensively studied.

At present, the existing optical fingerprint display module, as shown in Figure 1, includes a fingerprint module, a liquid crystal panel, and a backlight module. The liquid crystal panel is located above the backlight module, and the liquid crystal panel and the backlight module are both flat. Since the backlight module cannot penetrate light, in order to meet the recognition performance of the fingerprint module, the fingerprint module needs to be placed between one end of the LCD panel and one end of the backlight module, the other end of the LCD panel and the other end of the backlight module Through the black glue bonding, the LCD optical fingerprint recognition display module is formed.

However, in the existing display modules, the additional functional modules will cause a gap between the liquid crystal panel and the backlight module to be larger, and the gaps formed are not uniform, resulting in a gap between the backlight module and the liquid crystal panel. It cannot be close to each other to make the display brightness of the display module uneven and affect the display effect.

Application content

In order to solve the above technical problems, the present invention provides a backlight module, an under-screen optical fingerprint system, a display module and an electronic device.

In a first aspect, the present invention provides a backlight module adjacent to the liquid crystal panel, the backlight module includes adjacent light source components and light guide components; the light guide component includes a first light guide part and a second light guide part ；

In the vertical direction of the liquid crystal panel, the minimum distance between any position in the second light guide portion and the liquid crystal panel is smaller than the minimum distance between any position in the first light guide portion and the liquid crystal panel;

The first light guide portion is provided with a plurality of first uniform light structures, the second light guide portion is provided with a plurality of second uniform light structures, and the first uniform light structure and the second uniform light structure are used Therefore, the light from the light source assembly passes through the first light guide portion and the second light guide portion to reach the liquid crystal panel with uniform brightness.

Optionally, the first light guide part and the second light guide part are integrally formed to form the light guide assembly.

Optionally, the first light guide part and the second light guide part are connected to each other to form the light guide assembly.

Optionally, the light guide assembly further includes a light guide plate connection part located between the first light guide part and the second light guide part, and the light guide plate connection part is provided with a plurality of third uniform light structures The third uniform light structure is used to make the light from the light source assembly pass through the light guide plate connection part and the first light guide part and the second light guide part to reach the liquid crystal panel with uniform brightness.

Optionally, the first uniform light structure is non-uniformly distributed in the first light guide portion.

Optionally, the density or size of the first uniform light structure at any position in the first light guide portion is positively correlated with the optical path of the light from the light source assembly reaching that position in the first light guide portion , And positively correlated with the minimum distance from the position in the first light guide portion to the liquid crystal panel.

Optionally, the second uniform light structure is non-uniformly distributed in the second light guide portion.

Optionally, the minimum distance from each position in the second light guide portion to the liquid crystal panel is equal, and the density or size of the second uniform light structure at any position in the second light guide portion is equal to that of the The optical path of the light from the light source assembly reaching the position in the second light guide is positively correlated.

Optionally, the first uniform light structure, the second uniform light structure, and the third uniform light structure have a light guide particle structure and are respectively disposed in the first light guide part and the second light guide In the connecting part of the light guide plate.

Optionally, the first uniform light structure, the second uniform light structure, and the third uniform light structure have a convex light guide structure and are respectively disposed on the surface of the first light guide portion and the first light guide structure. The surface of the second light guide part and the surface of the connecting part of the light guide plate.

Optionally, the first uniform light structure, the second uniform light structure, and the third uniform light structure have recessed light guide structures and are respectively disposed on the surface of the first light guide portion and the second light guide structure. The surface of the light guide part and the surface of the light guide plate connection part.

Optionally, the first uniform light structure, the second uniform light structure, and the third uniform light structure have one of a rectangular shape, a triangular shape, a circular shape, and an oval shape.

In a second aspect, the present invention provides an under-screen optical fingerprint system, which is applied to an electronic device including a liquid crystal panel and the backlight module; the liquid crystal panel includes adjacent display areas and non-display areas;

The minimum distance between the backlight module and the non-display area is greater than the minimum distance between the backlight module and the display area;

The under-screen optical fingerprint system includes an optical fingerprint identification module, and the optical fingerprint identification module is disposed between the backlight module and the non-display area.

Optionally, the backlight module includes a first backlight area, a second backlight area, and a third backlight area;

The first backlight area and the non-display area are arranged opposite to each other, the second backlight area and the third backlight area are arranged opposite to the display area, and the minimum between the first backlight area and the non-display area is The distance is greater than the minimum distance between the third backlight area and the display area, and the second backlight area is connected to the first backlight area and connected to the third backlight area.

Optionally, the light guide assembly is bent toward a side away from the liquid crystal panel at the second backlight area, the first light guide portion is located in the second backlight area, and the second The light guide portion is located in the third backlight area.

Optionally, the light source assembly is located on a side of the first light guide part away from the second light guide part, or on a side of the light guide assembly away from the liquid crystal panel.

Optionally, the backlight module further includes a reflective film, a diffusion sheet, a lower prism film, an upper prism film, and an iron frame;

The iron frame accommodates the light source assembly, the light guide assembly, the reflective film, the diffusion sheet, the lower prism film, and the upper prism film;

The reflective film is arranged on the side of the light guide assembly away from the liquid crystal panel, and the diffuser, the lower prism film, and the upper prism film are successively arranged on the side of the light guide assembly close to the liquid crystal panel .

Optionally, the reflective film, the diffusion sheet, the lower prism film, and the upper prism film are bent toward a side away from the liquid crystal panel at the second backlight area.

Optionally, the light from the light source assembly reaches the optical fingerprint recognition module when it reflects off the surface of the liquid crystal panel away from the backlight module.

In a third aspect, the present invention provides a display module, including adjacent backlight modules and liquid crystal panels, the backlight module includes adjacent light source components and light guide components;

The light guide assembly includes a first light guide part and a second light guide part;

In a fourth aspect, the present invention provides an electronic device including the under-screen optical fingerprint system.

In the present invention, the backlight module is adjacent to the liquid crystal panel, and the backlight module includes adjacent light source components and light guide components. The light guide components include a first light guide part and a second light guide part; One side of the component first enters the first light guide portion and then reaches the second light guide portion; or, the light of the light source assembly can enter the first light guide portion and the second light guide portion from the side of the light guide component away from the liquid crystal panel; Part of the light from the light source assembly passes through the first light guide part to reach the liquid crystal panel, and another part of the light passes through the first light guide part and the second light guide part to reach the liquid crystal panel; or part of the light from the light source assembly reaches the liquid crystal panel through the first light guide part , Another part of the light reaches the liquid crystal panel through the second light guide part. The minimum distance between any position in the second light guide portion and the liquid crystal panel is smaller than the minimum distance between any position in the first light guide portion and the liquid crystal panel; the light path of the light source assembly through the first light guide portion to the liquid crystal panel is different from The light path of the light source assembly reaching the liquid crystal panel through the second light guide part, the attenuation of the light source assembly reaching the liquid crystal panel through the first light guide part is different from the attenuation of the light source assembly reaching the liquid crystal panel through the second light guide part. The first light guide portion is provided with a plurality of first uniform light structures, the first light uniform structure adjusts the brightness of the light source assembly to reach the liquid crystal panel through the first light guide portion, and the second light guide portion is provided with a plurality of second uniform lights Structure, the second uniform light structure adjusts the brightness of the light source assembly to reach the liquid crystal panel through the second light guide part, so that the light from the light source assembly passes through the first light guide part and the second light guide part to reach the liquid crystal panel with uniform brightness, In order to avoid the difference between the attenuation of the light of the light source assembly through the first light guide and the attenuation of the light of the light source assembly through the second light guide, the brightness of the liquid crystal panel is uneven.

Description of the drawings

In order to explain the technical solutions of the embodiments of the present invention more clearly, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative labor, other drawings can be obtained from these drawings.

FIG. 1 is a schematic structural diagram of a conventional optical fingerprint display module;

FIG. 2 is a schematic diagram of the structure of a conventional display module;

3 is a schematic structural diagram of a backlight module provided by Embodiment 1 of the present invention;

4 is a schematic structural diagram of a backlight module provided by Embodiment 3 of the present invention;

5 is a schematic structural diagram of a display module provided by Embodiment 4 of the present invention;

6 is a schematic structural diagram of another display module provided by the fourth embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a display module provided by Embodiment 6 of the present invention;

8 is a schematic structural diagram of another display module provided by the sixth embodiment of the present invention;

9A is a schematic structural diagram of a backlight module provided by another embodiment of the present invention;

9B is a schematic structural diagram of a backlight module provided by another embodiment of the present invention;

10 is a schematic structural diagram of a backlight module provided by another embodiment of the present invention;

11 is a schematic structural diagram of a backlight module provided by another embodiment of the present invention;

12 is a schematic structural diagram of a backlight module provided by another embodiment of the present invention;

FIG. 13 is a schematic structural diagram of a backlight module provided by another embodiment of the present invention;

14 is a schematic structural diagram of a backlight module provided by another embodiment of the present invention;

15 is a schematic structural diagram of a backlight module provided by another embodiment of the present invention;

16 is a schematic structural diagram of a backlight module provided by another embodiment of the present invention;

17 is a schematic structural diagram of a backlight module provided by another embodiment of the present invention;

18 is a schematic structural diagram of a backlight module provided by another embodiment of the present invention;

19 is a schematic structural diagram of a backlight module provided by another embodiment of the present invention;

20 is a schematic structural diagram of an optical fingerprint system according to another embodiment of the present invention;

FIG. 21 is a schematic structural diagram of a display module provided by another embodiment of the present invention.

detailed description

In order to better understand the technical solutions of the present invention, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

It should be clear that the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms of "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

Example one

3 is a schematic structural diagram of a backlight module provided by Embodiment 1 of the present invention.

The first aspect of the present invention provides a backlight module 10 for bonding with a liquid crystal panel 20 to form a display module. The backlight module 10 is located behind the display module and can provide a light source. Its function is to supply sufficient brightness and Evenly distributed light sources, so that the display module can display images normally.

The display module is usually formed by bonding a backlight module 10 and a liquid crystal panel 20. As shown in FIG. 2, the backlight module 10 includes a light source assembly 13 and a light guide module 14. The liquid crystal panel 20 can be divided into a display area 22 and a non-display area. Area 21, where the display area 22 is used for pattern display, and the liquid crystal panel 20 is also covered with a glass cover 50. The backlight module 10 and the liquid crystal panel 20 are both horizontal planes, the backlight module 10 and the liquid crystal panel 20 are arranged in parallel, and the black glue 40 at both ends is closely attached to form a display module, between the backlight module 10 and the liquid crystal panel 20, etc. The spacing is set so that the light from the backlight module 10 can be uniformly irradiated on the liquid crystal panel 20, which ensures the uniformity of the brightness of the display area 22 of the liquid crystal panel, and improves the display effect. When some functional modules are added to the display module, the added functional module 30 is located between one end of the liquid crystal panel 20 and one end of the backlight module 10, and the other end of the liquid crystal panel 20 and the other end of the backlight module 10 pass through The black glue 40 is bonded, so that a larger gap is formed between the liquid crystal panel 20 and the backlight module 10, and the gap distance formed between the two is not consistent, which makes the display brightness of the display module uneven and reduces the display effect.

Based on the above reasons, an embodiment of the present invention provides a backlight module 10 for bonding with a liquid crystal panel to form a display module. As shown in FIG. 3, the backlight module 10 includes a first backlight module opposite to the non-display area of the liquid crystal panel. The plane 11 and the second plane 12 opposite to the display area of the liquid crystal panel, wherein the plane refers to a plane parallel to the horizontal direction, that is, the first plane 11 and the second plane 12 are two horizontal planes parallel to each other. The backlight module 10 includes a first plane 11 and a second plane 12. It should be noted that one end of the first plane 11 and one end of the second plane 12 are connected to ensure the performance of the backlight module 10. When the group 10 and the liquid crystal panel are bonded to form a display module, the first plane 11 of the backlight module 10 is arranged opposite to the non-display area of the liquid crystal panel, and the second plane 12 of the backlight module 10 is arranged opposite to the display area of the liquid crystal panel.

In order to ensure the uniformity of the display brightness after the function modules are installed, in this embodiment, as shown in FIG. 3, the first plane 11 is lower than the second plane 12 in the vertical direction, so that the backlight module 10 is An accommodating space 16 for accommodating functional modules is formed at the first plane 11, where the vertical direction refers to a direction perpendicular to the horizontal, that is, the first plane 11 and the second plane 12 of the backlight module 10 are in the vertical direction. Two planes with different heights, and the vertical height of the first plane 11 is relatively low, so that an accommodating space 16 is left at the first plane 11 of the backlight module 10, and the functional module can be arranged in the accommodating space 16 Inside, when attaching to the liquid crystal panel, the first plane 11 is opposite to the non-display area, and the second plane 12 is opposite to the display area. The functional module can be arranged in the accommodation space 16 of the first plane 11 of the backlight module 10 The first plane 11 and the second plane 12 are two planes with different heights, so that the second plane 12 and the liquid crystal panel display area facing the second plane 12 can be arranged at equal intervals, so that the backlight module The light of 10 can be evenly irradiated on the display area of the liquid crystal panel, thereby ensuring the uniformity of the display brightness and improving the display effect.

In this embodiment, the specific value of the first plane 11 in the vertical direction that is lower than the second plane 12 can be selected and set according to the thickness of the functional module set in actual needs. It should be noted that the When bonding, one end of the second plane 12 is bonded to one end of the display area of the liquid crystal panel through black glue, so that the side of the display area facing the second plane 12 and the second plane 12 are equidistant, then the first The specific value of the plane 11 lower than the second plane 12 in the vertical direction can be obtained by using the thickness of the functional module minus the value of the distance between the side of the display area facing the second plane 12 and the second plane 12. Specifically, if the thickness of the functional module 30 is 1 mm, and after the backlight module 10 is bonded to the liquid crystal panel, there is a 0.5 mm gap between the side of the display area facing the second plane 12 and the second plane 12, then The first plane 11 may have a height value of 0.5 mm lower than the second plane 12 in the vertical direction.

Further, in this embodiment, the backlight module 10 includes a light guide module 14 and a light source assembly 13. The light guide module 14 is located in an area corresponding to the second plane 12, and the light source assembly 13 is located in an area corresponding to the first plane 11. Inside, as shown in FIG. 3, one end of the light guide module 14 is connected to one end of the light source assembly 13, the light source assembly 13 provides a light source for the backlight module 10, and the light emitted by the light source assembly 13 is processed by the light guide module 14 and emitted . The light guide module 14 is located in the area corresponding to the second plane 12, and the light source assembly 13 is located in the area corresponding to the first plane 11. The vertical height of the light source assembly 13 can be made smaller than the vertical height of the light guide module 14. That is, the setting position of the light source assembly 13 is lowered, so that the first plane 11 is lower than the second plane 12 in the vertical direction, so that the backlight module 10 leaves an accommodation space 16 at the position corresponding to the light source assembly 13 To set up the function module.

Wherein, in this embodiment, the light guide module 14 of the backlight module 10 may include a reinforcing steel plate, a reflective film, a light guide plate, a uniform light film, and a brightness enhancement film. The composition film layer of the light guide module 14 may be In addition to the above-mentioned film layers, the constituent film layers in the prior art may also include other film layers. The specific film layers and the arrangement between the film layers can be referred to the prior art, and will not be repeated in this embodiment.

Further, in this embodiment, the backlight module 10 further includes a functional module, the functional module is arranged in the accommodating space 16, wherein the functional module can be a fingerprint module, the functional module can also be used for A module that improves the performance of the backlight module 10 or enables the backlight module 10 to have other functions.

This embodiment provides a backlight module 10. The backlight module 10 includes a first plane 11 opposite to the display area of the liquid crystal panel, and a second plane 12 opposite to the display area of the liquid crystal panel, and the first plane 11 is vertical. It is lower than the second plane 12 in the straight direction, so that the backlight module 10 forms an accommodating space 16 at the first plane 11 for accommodating functional modules, that is, the first plane 11 and the second plane 12 of the backlight module 10 are vertical Two planes with different heights in the straight direction, and the vertical height of the first plane 11 is lower, so that a accommodating space 16 is left at the first plane 11 of the backlight module 10, and the functional module can be arranged in the accommodating Inside the space 16. When bonding with the liquid crystal panel, the functional module is arranged in the accommodation space 16 at the first plane 11 of the backlight module 10, so that the second plane 12 and the liquid crystal panel display area facing the second plane 12 can be equally spaced The setting of, so that the light of the backlight module 10 can be evenly irradiated on the display area of the liquid crystal panel, which ensures the uniformity of the display brightness and improves the display effect. It solves the problem that the existing display module and the added functional module will form a gap with inconsistent spacing between the liquid crystal panel and the backlight module, causing uneven display brightness and affecting the display effect.

Example two

Further, on the basis of Embodiment 1, in this embodiment, the end of the second plane 12 close to the first plane 11 extends toward the first plane 11 and is connected to the first plane 11, as shown in FIG. 3, by making The end of the second plane 12 close to the first plane 11 extends toward the first plane 11 and is connected to the first plane 11, that is, the end of the second plane 12 connected to the first plane 11 forms a special-shaped structure, so that the first plane 11 is lower than The second plane 12 connects the first plane 11 with the second plane 12, and then leaves an accommodating space 16 at the first plane 11 on the backlight module 10 for arranging functional modules. At the same time, the second plane 12 extends The out part is a material with light guiding properties, which will not affect the performance of the backlight module 10.

Among them, in this embodiment, specifically, the backlight module 10 includes a light guide module 14 and a light source assembly 13, the light guide module 14 is located in an area corresponding to the second plane 12, and the light source assembly 13 is located in a corresponding area of the first plane 11. In the area of, the end of the light guide module 14 close to the light source assembly 13 extends toward the light source assembly 13 and is connected to the light source assembly 13, that is, the end of the light guide module 14 connected to the light source assembly 13 forms a special-shaped structure to be connected to the light source assembly 13. The accommodating space 16 is formed at the position corresponding to the backlight module 10 and the light source assembly 13 while ensuring the performance of the backlight module 10.

It should be noted that, in this embodiment, the abnormal shape refers to a shape different from the first plane 11 and the second plane 12, that is, the connecting structure is a plane that is not horizontal, specifically, it can be inclined to the first plane. Inclined surface, curved surface, etc.

The backlight module 10 provided in this embodiment extends toward the first plane 11 by making the end of the second plane 12 close to the first plane 11 and is connected to the first plane 11, that is, the second plane 12 is connected to the first plane 11 One end of the backlight module forms a special-shaped structure to connect with the first plane 11, thereby forming an accommodating space 16 for accommodating the functional module at the first plane 11 of the backlight module 10, while ensuring the performance of the backlight module 10.

Example three

FIG. 4 is a schematic structural diagram of a backlight module provided by Embodiment 3 of the present invention.

Further, on the basis of the third embodiment above, in this embodiment, the backlight module 10 further includes: a light guide connecting portion 15. As shown in FIG. 4, the first end of the light guide connecting portion 15 and the second A plane 11 is connected, the second end of the light guide connecting portion 15 is connected with the second plane 12, and the first end is lower than the second end in the vertical direction, that is, the first plane 11 and the second plane 12 are connected by light guide Part 15 is connected, and the first end of the light guide connecting part 15 connected with the first plane 11 is lower than the second end of the light guide connecting part 15 connected with the second plane 12, so that the light guide connecting part 15 of the special-shaped structure makes The first plane 11 is lower than the second plane 12 in the vertical direction, so that the backlight module 10 forms an accommodation space 16 at the first plane 11 and at the same time ensures the performance of the backlight module 10.

It should be noted that, in this embodiment, the light guide connecting portion 15 has light guide performance to meet the functional requirements of the backlight module 10. The shape of the light guide connecting portion 15 can be selected and set according to actual needs. It can be selected according to the height difference between the first plane 11 and the second plane 12 in the vertical direction and the brightness performance requirements of the backlight module. In this embodiment, the light guide connecting portion 15 has an arc structure. The light guide connecting portion 15 may be composed of multiple light film layers. For example, the light guide connecting portion 15 may include a reinforcing steel plate, a reflective film, a light guide plate, a uniform light film, a brightness enhancement film, etc., which are sequentially arranged.

Wherein, in this embodiment, specifically, as shown in FIG. 4, the backlight module 10 further includes a light guide module 14 and a light source assembly 13. The light guide module 14 is located in an area corresponding to the second plane 12, and the light source The component 13 is located in the area corresponding to the first plane 11, the light source component 13 is connected to the first end of the light guide connecting portion 15, and the second end of the light guide connecting portion 15 is connected to the light guide module 14, thereby being connected by light guide The part 15 connects the light source assembly 13 and the light guide module 14, and forms an accommodation space 16 at the position corresponding to the backlight module 10 and the light source assembly 13 while ensuring the performance of the backlight module 10.

The backlight module 10 provided by this embodiment includes a light guide connecting portion 15, so that the first end of the light guide connecting portion 15 is connected to the first plane 11, and the second end of the light guide connecting portion 15 is connected to the second plane. 12 is connected, and the first end is lower than the second end in the vertical direction, that is, the first plane 11 and the second plane 12 are connected by the light guide connecting portion 15, and the first plane is connected by the light guide connecting portion 15 of the special-shaped structure 11 is lower than the second plane 12 in the vertical direction, so that the backlight module 10 forms an accommodating space 16 at the first plane 11, while ensuring the performance of the backlight module 10.

Example four

FIG. 5 is a schematic structural diagram of a display module provided by Embodiment 4 of the present invention, and FIG. 6 is a schematic structural diagram of another display module provided by Embodiment 4 of the present invention.

A second aspect of the present invention provides a display module, as shown in FIGS. 5 and 6. In this embodiment, the display module includes a liquid crystal panel 20 and a backlight module 10, wherein the liquid crystal panel 20 includes a non-display Area 21 and display area 22. The backlight module 10 includes a first plane 11 and a second plane 12. The first plane 11 is arranged opposite to the non-display area 21, and the second plane 12 is arranged opposite to the display area 22. It should be noted that, In this embodiment, the plane refers to a plane parallel to the horizontal direction, that is, the first plane 11 and the second plane 12 are two horizontal planes parallel to each other.

In order to improve the uniformity of the display brightness of the display module provided with the functional module, in this embodiment, as shown in FIG. 5, the first plane 11 of the backlight module 10 is vertically lower than the second plane 12, And there is an accommodating space 16 for accommodating the functional module 30 between the first plane 11 and the non-display area 21, wherein the vertical direction refers to a direction perpendicular to the horizontal, that is, the first plane 11 and the second plane of the backlight module 10 The heights of the two planes 12 in the vertical direction are different, and the first plane 11 is lower than the second plane 12, thus leaving an accommodation space 16 between the first plane 11 and the non-display area 21 of the backlight module 10. The additional functional module 30 can be arranged in the accommodating space 16, and since the second plane 12 and the first plane 11 are two planes with different heights, the second plane 12 and the display area 22 can face the second plane 12 The one side of the LCD panel is arranged at equal intervals, so that the light of the backlight module 10 can be evenly irradiated on the display area 22 of the liquid crystal panel 20, which ensures the uniformity of the display brightness of the display area 22 and improves the display effect.

In this embodiment, the specific value of the first plane 11 in the vertical direction lower than that of the second plane 12 can be selected and set according to the thickness of the function module 30 added in actual requirements, and the first plane 11 is in the vertical direction. The specific value lower than the second plane 12 can be obtained by using the thickness of the functional module 30 to subtract the value of the distance between the side of the display area 22 facing the second plane 12 and the second plane 12, and the specific calculation method can refer to the implementation Example 1, which will not be repeated in this embodiment.

Further, in this embodiment, the backlight module 10 includes a light guide module 14 and a light source assembly 13. The light guide module 14 is located in an area corresponding to the second plane 12, and the light source assembly 13 is located in an area corresponding to the first plane 11. Inside, as shown in FIG. 5, one end of the light guide module 14 is connected to one end of the light source assembly 13. The light source assembly 13 provides a light source for the backlight module 10, and the light emitted by the light source assembly 13 is processed by the light guide module 14 and emitted . The light guide module 14 is located in the area corresponding to the second plane 12, and the light source assembly 13 is located in the area corresponding to the first plane 11. The vertical height of the light source assembly 13 can be made smaller than the vertical height of the light guide module 14. That is, the setting position of the light source assembly 13 is lowered, so that the first plane 11 is lower than the second plane 12 in the vertical direction, so that a function module is formed between the light source assembly 13 and the non-display area 21 The accommodation space 16.

Among them, in this embodiment, the constituent film layers of the light guide module 14 can refer to Embodiment 1, and will not be repeated in this embodiment. The liquid crystal panel may include a lower polarizer, an array substrate, a liquid crystal, a color filter, an upper polarizer, etc. The liquid crystal panel may be an existing liquid crystal panel, or may include other structures. The specific structure and arrangement may be See the liquid crystal panel in the prior art.

Further, in this embodiment, as shown in FIG. 6, the display module further includes a functional module 30, which is disposed in the accommodating space 16, wherein the functional module 30 may be a fingerprint module, It can also be a module that can realize other functions.

In this embodiment, the display module may be a display component in products such as electronic paper, tablet computers, liquid crystal displays, liquid crystal televisions, digital photo frames, and mobile phones.

This embodiment provides a display module. The backlight module 10 includes a first plane 11 opposite to the non-display area 21 of the liquid crystal panel 20, and a second plane 12 opposite to the display area 22 of the liquid crystal panel. 11 is lower than the second plane 12 in the vertical direction, and there is an accommodating space 16 for accommodating the functional module 30 between the first plane 11 and the non-display area 21, that is, the first plane 11 of the backlight module 10 The height in the vertical direction is different from that of the second plane 12, and the first plane 11 is lower than the second plane 12, thus leaving an accommodation space between the first plane 11 and the non-display area 21 of the backlight module 10 16. The additional functional module 30 can be arranged in the accommodating space 16, so that the second plane 12 and the side of the display area 22 facing the second plane 12 can be arranged at equal intervals, so that the light of the backlight module 10 can be uniform Irradiating on the display area 22 of the liquid crystal panel 20 ensures the uniformity of the display brightness of the display area 22 and improves the display effect.

Example five

Further, on the basis of the fourth embodiment, as shown in FIGS. 5 and 6, in this embodiment, the side of the non-display area 21 facing the first plane 11 is flat with the side of the display area 22 facing the second plane 12 The backlight module 10 forms an accommodating space 16 at the first plane 11, that is, the non-display area 21 and the display area 22 of the liquid crystal panel 20 facing the backlight module 10 are flush with each other and the same height plane, and the backlight module The first plane 11 of the group 10 is lower than the second plane 12 in the vertical direction, so that the backlight module 10 forms an accommodating space 16 for accommodating the functional module 30 at the first plane 11, thereby realizing the setting of the functional module After the group 30, it can still be ensured that the side of the display area 22 facing the second plane 12 and the second plane 12 are arranged at equal intervals, and the uniformity of the display brightness of the display area 22 is ensured.

In this embodiment, the specific value of the first plane 11 in the vertical direction lower than that of the second plane 12 can be selected and set according to the thickness of the functional module 30 set in actual requirements, and the first plane 11 is in the vertical direction. The specific value lower than the second plane 12 can be obtained by using the thickness of the functional module 30 to subtract the value of the distance between the side of the display area 22 facing the second plane 12 and the second plane 12, and the specific calculation method can refer to the implementation Example 1, which will not be repeated in this embodiment.

Further, in this embodiment, the first plane 11 and the second plane 12 of the backlight module 10 are connected, and the first plane 11 is lower than the second plane 12 in the vertical direction. The specific arrangement may be The end of the second plane 12 close to the first plane 11 extends toward the first plane 11 and is connected to the first plane 11, so that the end connected to the first plane 11 through the second plane 12 forms a special-shaped structure to connect to the first plane 11, For the specific setting method, please refer to the second embodiment; it can also be that the first plane 11 and the second plane 12 are connected through a special-shaped light guide connecting portion 15, and the first plane 11 is lower than the second plane in the vertical direction. 12. For the specific setting method, please refer to the third embodiment, which will not be repeated in this embodiment.

Wherein, in this embodiment, the backlight module 10 includes a light guide module 14 and a light source assembly 13. The light guide module 14 is located in an area corresponding to the second plane 12, and the light source assembly 13 is located in an area corresponding to the first plane 11. For the specific setting method and film structure, please refer to the first embodiment, which will not be repeated in this embodiment. The light guide module 14 and the light source assembly 13 can be connected to the light source assembly 13 by extending one end of the light guide module 14 toward the light source assembly 13, and the light guide module 14 can also be connected to the light source assembly 13 through the light guide connecting portion 15 Connected.

Further, in this embodiment, as shown in FIG. 6, the display module further includes a functional module 30, the functional module 30 is disposed in the accommodating space 16, and the functional module 30 may be a fingerprint recognition module. It can also be a module with other functions.

In the display module provided by this embodiment, the side of the non-display area 21 facing the first plane 11 is flush with the side of the display area 22 facing the second plane 12, so that the backlight module 10 is formed on the first plane 11. The accommodating space 16, that is, the non-display area 21 and the display area 22 of the liquid crystal panel 20 facing the backlight module 10 are flush with each other and the same height plane, and the first plane 11 of the backlight module 10 is vertically lower than The second plane 12 enables the backlight module 10 to form an accommodating space 16 for accommodating the functional module 30 at the first plane 11, so that after the functional module 30 is installed, the display area 22 can still be guaranteed to face the second plane The equidistant arrangement between one side of 12 and the second plane 12 ensures the uniformity of the display brightness of the display area 22.

Example Six

FIG. 7 is a schematic structural diagram of a display module provided by Embodiment 6 of the present invention, and FIG. 8 is a schematic structural diagram of another display module provided by Embodiment 6 of the present invention.

Further, on the basis of the fourth embodiment, as shown in FIGS. 7 and 8, in this embodiment, the side of the non-display area 21 facing the first plane 11 is vertically higher than the display area 22 facing the second plane. One side of the two planes 12, and the side of the non-display area 21 facing the first plane 11 and the first plane 11 together form an accommodation space 16, that is, the side of the non-display area 21 facing the first plane 11 and the display area 22 facing the second plane The plane 12 has two planes with different heights in the vertical direction, and the side of the non-display area 21 facing the first plane 11 is higher than the side of the display area 22 facing the second plane 12, and the first plane of the backlight module 10 11 is lower than the second plane 12, so that the side of the non-display area 21 facing the first plane 11 and the first plane 11 together form the accommodating space 16, so that after the functional module 30 is installed, the display area can still be guaranteed The side 22 facing the second plane 12 and the second plane 12 are arranged at equal intervals to ensure the uniformity of the display brightness of the display area 22.

Wherein, in this embodiment, as shown in FIG. 7, the end of the non-display area 21 close to the display area 22 may extend toward the display area 22 to be connected to the display area 22, so that the non-display area 21 faces the side of the first plane 11. An end higher than the display area 22 facing the second plane 12, while ensuring that the display area 22 and the second plane 12 are arranged at equal intervals. The connection between the display area 22 and the non-display area 21 may also be realized by a connecting portion with a special-shaped structure.

It should be noted that, in this embodiment, the side of the non-display area 21 facing the first plane 11 is higher than the height of the display area 22 facing the second plane 12, the height of the first plane 11 is lower than the height of the second plane 12, and the display The distance between the side of the area 22 facing the second plane 12 and the second plane 12 together constitutes the height value of the accommodating space 16, which is equal to the thickness value of the functional module 30, because the liquid crystal panel 20 is also provided with a glass cover 50, and the liquid crystal panel 20 has more layers and wiring. Therefore, in this embodiment, the non-display area 21, the display area 22, the first plane 11 and the second plane 12 are set according to the thickness of the functional module 30 When the height is high, the height of the non-display area 21 facing the first plane 11 is higher than the display area 22 facing the second plane 12, which should account for a smaller proportion of the thickness to ensure the performance of the liquid crystal panel 20. Specifically, such as functional modules The thickness of the group 30 is 1mm, and the distance between the side of the display area 22 facing the second plane 12 and the second plane 12 is 0.4mm. At this time, the side of the non-display area 21 facing the first plane 11 can be higher than the display area 22 The height of the surface facing the second plane 12 is 0.2 mm, and the height of the first plane 11 lower than the second plane 12 is 0.4 mm.

Further, in this embodiment, the first plane 11 and the second plane 12 of the backlight module 10 are connected, and the first plane 11 is lower than the second plane 12 in the vertical direction. The specific arrangement may be The end of the two planes 12 close to the first plane 11 extends toward the first plane 11 and is connected to the first plane 11, that is, the end of the second plane 12 connected to the first plane 11 forms a special-shaped structure to connect to the first plane 11, specifically The setting method can be referred to the second embodiment; it can also be that the first plane 11 and the second plane 12 are connected through a special-shaped light guide connecting portion 15, and the first plane 11 is lower than the second plane 12 in the vertical direction, For the specific setting method, refer to Embodiment 3, which will not be repeated in this embodiment.

Further, in this embodiment, as shown in FIG. 8, the display module further includes a functional module 30, the functional module 30 is arranged in the accommodation space 16, the functional module 30 may be a fingerprint recognition module Groups can also be modules with other functions.

This embodiment provides a display module. The side of the non-display area 21 facing the first plane 11 is vertically higher than the side of the display area 22 facing the second plane 12, and the non-display area 21 faces the first plane. One side of 11 and the first plane 11 together form the accommodation space 16, that is, the side of the non-display area 21 facing the first plane 11 and the side of the display area 22 facing the second plane 12 are two planes with different heights in the vertical direction. , And the side of the non-display area 21 facing the first plane 11 is higher than the side of the display area 22 facing the second plane 12, and the first plane 11 of the backlight module 10 is lower than the second plane 12, so that the non-display area 21 The side facing the first plane 11 and the first plane 11 together form the accommodating space 16, so that after the functional module 30 is installed, the display area 22 can still be ensured between the side facing the second plane 12 and the second plane 12 The equidistant setting of, ensures the uniformity of the display brightness of the display area 22.

Example Seven

The third aspect of the present invention provides an under-screen optical fingerprint system, which is applied to an electronic device having a liquid crystal panel and a backlight module. The under-screen optical fingerprint system includes a fingerprint detection light source and an optical fingerprint identification module. In this embodiment 6, the liquid crystal panel 20 includes a non-display area 21 and a display area 22. The optical fingerprint recognition module is used to be disposed under the non-display area 21 of the liquid crystal panel 20, and is located in the backlight module 10 through the non-display area 21 The accommodating space 16 formed by the sinking design, specifically, as shown in FIG. 6, the backlight module 10 is designed to form the accommodating space 16 at a position corresponding to the non-display area 21 by sinking, and the optical fingerprint module is arranged in the accommodating space 16 In the space 16, the side of the display area 22 of the liquid crystal panel 20 facing the backlight module 10 and the side of the backlight module 10 on the side of the display area 22 facing the liquid crystal panel 20 can be arranged at equal intervals, so that the backlight module 10 The light can be uniformly irradiated on the display area 22 of the liquid crystal panel 20, which ensures the uniformity of the display brightness of the display area 22 and improves the display effect.

In this embodiment, the optical fingerprint recognition module is used to be arranged under the non-display area 21 of the liquid crystal panel 20, and the fingerprint detection area of the optical fingerprint recognition module is at least partially located in the display area 22 of the liquid crystal panel 20, and the fingerprint detection light source It is used to emit detection light to the fingerprint detection area located in the display area 22. The detection light forms a return light when it irradiates the finger in the fingerprint detection area, and is transmitted to the optical fingerprint recognition module located in the non-display area 21 through the optical path guide structure. The light path guiding structure refers to the light guiding structure formed by the light guiding film material on the backlight module 10 side or other optical layers (such as mirrors or air gaps, etc.). During fingerprint detection and recognition, the finger is placed in the liquid crystal panel display area 22 In the fingerprint detection area, the detection light emitted by the fingerprint detection light source to the fingerprint detection area is irradiated on the finger to form a return light with fingerprint information. After the return light passes through the liquid crystal panel 22, it is transmitted to the The optical fingerprint identification module at 21 in the display area, the optical fingerprint identification module can further detect the returned light, and detect fingerprint information through photoelectric conversion and other signal processing, so as to perform comparison and identification based on the fingerprint information.

Further, in this embodiment, as shown in FIG. 6, the liquid crystal panel 20 includes a non-display area 21 and a display area 22, and the backlight module 10 includes a first plane 11 and a second plane 12. The area 21 is arranged opposite, and the second plane 12 is arranged opposite to the display area 22. It should be noted that in this embodiment, the plane refers to a plane parallel to the horizontal direction, that is, the first plane 11 and the second plane 12 are two Horizontal planes that are parallel to each other. Wherein, the first plane 11 of the backlight module 10 is lower than the second plane 12 in the vertical direction, and there is an accommodation space 1616 for accommodating the functional module 30 between the first plane 11 and the non-display area 21, wherein, The vertical direction refers to the direction perpendicular to the horizontal, that is, the heights of the first plane 11 and the second plane 12 of the backlight module 10 in the vertical direction are different, and the first plane 11 is lower than the second plane 12, so that An accommodating space 16 is left between the first plane 11 of the backlight module 10 and the non-display area 21. The optical fingerprint recognition module can be arranged in the accommodating space 16, and since the second plane 12 and the first plane 11 are at a height The two different planes enable the second plane 12 and the side of the display area 22 facing the second plane 12 to be equally spaced, so that the light from the backlight module 10 can be uniformly irradiated on the display area 22 of the liquid crystal panel 20.

In this embodiment, the specific value of the first plane 11 in the vertical direction lower than that of the second plane 12 can be selected and set according to the thickness of the functional module 30 added in the actual requirements. The specific calculation method can refer to the first embodiment. It will not be repeated in this embodiment.

In this embodiment, the backlight module 10 includes a light guide module 14 and a light source assembly 13. The light guide module 14 is located in an area corresponding to the second plane 12, and the light source assembly 13 is located in an area corresponding to the first plane 11, such as As shown in FIG. 6, one end of the light guide module 14 is connected to one end of the light source assembly 13, the light source assembly 13 provides a light source for the backlight module 10, and the light emitted by the light source assembly 13 is processed by the light guide module 14 and emitted. The light guide module 14 is located in the area corresponding to the second plane 12, and the light source assembly 13 is located in the area corresponding to the first plane 11. The vertical height of the light source assembly 13 can be made smaller than the vertical height of the light guide module 14. That is, the setting position of the light source assembly 13 is lowered, so that the first plane 11 is lower than the second plane 12 in the vertical direction, so that a function module is formed between the light source assembly 13 and the non-display area 21 The accommodation space 16.

In this embodiment, the fingerprint detection light source is an invisible light source independent of the liquid crystal panel and the backlight module, that is, the fingerprint detection light source is an independently set detection light source for emitting detection to the fingerprint detection area located at the corresponding position of the display area Light.

The under-screen optical fingerprint system provided in this embodiment includes a fingerprint detection light source and an optical fingerprint recognition module, and the optical fingerprint recognition module is used to be arranged under the non-display area 21 of the liquid crystal panel 20 and located in the backlight The module 10 is in the non-display area 21 through a sinking design to form the containing space 16, and the fingerprint detection area of the optical fingerprint recognition module is at least partially located in the display area 22 of the liquid crystal panel 20, so that the fingerprint detection light source is used to display The fingerprint detection area of area 22 emits detection light. The detection light forms a return light when it irradiates the finger in the fingerprint detection area, and is transmitted to the optical fingerprint recognition module located in the non-display area 21 through the optical path guide structure, thereby realizing fingerprint recognition , That is, by arranging the optical fingerprint module in the accommodating space 16 formed by sinking of the backlight module 10 at the non-display area 21, the display area 22 of the liquid crystal panel 20 faces the side of the backlight module 10 and the backlight module 10 The display area 22 can be arranged at equal intervals between the side facing the liquid crystal panel 20, so that the light of the backlight module 10 can be evenly irradiated on the display area 11 of the liquid crystal panel 20, and the uniform display brightness of the display area 22 is ensured It improves the display effect.

Example eight

Further, on the basis of the seventh embodiment, as shown in FIG. 6, in this embodiment, the side of the non-display area 21 facing the first plane 11 is flush with the side of the display area 22 facing the second plane 12, and The backlight module 10 forms an accommodating space 16 at the first plane 11, that is, the non-display area 21 and the display area 22 of the liquid crystal panel 20 facing the backlight module 10 are flush with each other and the same height plane, and the backlight module 10 The first plane 11 is lower than the second plane 12 in the vertical direction, so that the backlight module 10 forms an accommodating space 16 for accommodating the optical fingerprint recognition module at the first plane 11, thereby ensuring that the display area 22 faces the second plane. The equal spacing between one side of the plane 12 and the second plane 12 improves the uniformity of the display brightness of the display area 22.

In this embodiment, the specific value of the first plane 11 in the vertical direction lower than that of the second plane 12 can be selected and set according to the thickness of the optical fingerprint recognition module set in actual requirements, and the specific calculation method can refer to the embodiment One, it will not be repeated in this embodiment.

Wherein, in this embodiment, the backlight module 10 includes a light guide module 14 and a light source assembly 13. The light guide module 14 is located in an area corresponding to the second plane 12, and the light source assembly 13 is located in an area corresponding to the first plane 11. For the specific setting method and film layer structure, refer to the seventh embodiment, which will not be repeated in this embodiment. The light guide module 14 and the light source assembly 13 can be connected to the light source assembly 13 by extending one end of the light guide module 14 toward the light source assembly 13, and the light guide module 14 can also be connected to the light source assembly 13 through the light guide connecting portion 15 Connected.

The under-screen optical fingerprint system provided in this embodiment is arranged below the non-display area 21 of the liquid crystal panel 20 and is located in the accommodation space 16 formed by the sinking design of the backlight module 10 in the non-display area 21, specifically The side of the non-display area 21 facing the first plane 11 of the backlight module 10 is flush with the side of the display area 22 facing the second plane 12 of the backlight module 10, so that the backlight module 10 forms an accommodation space at the first plane 11 16. The optical fingerprint recognition module is arranged in the accommodating space 16, thereby ensuring that the side of the display area 22 facing the second plane 12 and the second plane 12 are arranged at equal intervals, and the uniformity of the display brightness of the display area 22 is improved .

Example 9

Further, on the basis of the seventh embodiment, as shown in FIG. 8, in this embodiment, the side of the non-display area 21 facing the first plane 11 is vertically higher than the display area 22 facing the second plane 12. The side of the non-display area 21 facing the first plane 11 and the first plane 11 together form the containing space 16, that is, the side of the non-display area 21 facing the first plane 11 and the side of the display area 22 facing the second plane 12 One side is two planes with different heights in the vertical direction, and the side of the non-display area 21 facing the first plane 11 is higher than the side of the display area 22 facing the second plane 12, and the first plane 11 of the backlight module 10 is lower than The second plane 12, so that the side of the non-display area 21 facing the first plane 11 and the first plane 11 together form an accommodation space 16. The optical fingerprint recognition module is arranged in the accommodation space 16, thereby ensuring the display area 22 The equal spacing between the side facing the second plane 12 and the second plane 12 improves the uniformity of the display brightness of the display area 22.

Wherein, in this embodiment, as shown in FIG. 8, the end of the non-display area 21 close to the display area 22 may extend toward the display area 22 to be connected to the display area 22, so that the non-display area 21 faces a side of the first plane 11. An end higher than the display area 22 facing the second plane 12, while ensuring that the display area 22 and the second plane 12 are arranged at equal intervals. The connection between the display area 22 and the non-display area 21 may also be realized by a connecting portion with a special-shaped structure.

It should be noted that, in this embodiment, the side of the non-display area 21 facing the first plane 11 is higher than the height of the display area 22 facing the second plane 12, the height of the first plane 11 is lower than the height of the second plane 12, and the display The distance between the side of the area 22 facing the second plane 12 and the second plane 12 together constitutes the height value of the accommodation space 16. For the specific setting and calculation method, please refer to the sixth embodiment, which will not be repeated in this embodiment.

The under-screen optical fingerprint system provided by this embodiment is formed by arranging the optical fingerprint recognition module under the non-display area 21 of the liquid crystal panel 20, and is formed by sinking the backlight module 10 in the non-display area 21 Specifically, the side of the non-display area 21 facing the first plane 11 of the backlight module 10 is vertically higher than the side of the display area 22 facing the second plane 12 of the backlight module 10, and the non-display area The side of the region 21 facing the first plane 11 and the first plane 11 together form an accommodating space 16. The optical fingerprint recognition module is arranged in the accommodating space 16, thereby ensuring that the display area 22 faces the side of the second plane 12 and the second plane. The equal spacing between the planes 12 improves the uniformity of the display brightness of the display area 22.

Example ten

A fourth aspect of the present invention provides an electronic device, which includes the under-screen optical fingerprint system in any of the above embodiments, and the electronic device may specifically be a liquid crystal display device, electronic paper, mobile phone, tablet computer, television, Electronic products or components such as laptops, digital photo frames, navigators, fingerprint locks, etc.

9A is a schematic structural diagram of a backlight module provided by another embodiment of the present invention; FIG. 9B is a schematic structural diagram of a backlight module provided by another embodiment of the present invention.

As shown in FIGS. 9A and 9B, the backlight module 200 is adjacent to the liquid crystal panel 300. The backlight module 200 includes an adjacent light source assembly 201 and a light guide assembly 202; the light guide assembly 202 includes a first light guide 210 and a second light guide. Light portion 220; in the vertical direction of the liquid crystal panel 300, the minimum distance between any position of the second light guide portion 220 and the liquid crystal panel 300 is smaller than the minimum distance between any position of the first light guide portion 210 and the liquid crystal panel 300; A light guide portion 210 is provided with a plurality of first uniform light structures 211, and the second light guide portion 220 is provided with a plurality of second uniform light structures 221. The first uniform light structures 211 and the second uniform light structures 221 are used to make the light source The light from the component 201 passes through the first light guide portion 210 and the second light guide portion 220 to reach the liquid crystal panel 300 with uniform brightness.

In another embodiment of the present invention, the backlight module 200 is the same as the backlight module 10 of the foregoing embodiment, the liquid crystal panel 300 is the same as the liquid crystal panel 20 of the foregoing embodiment, and the light source assembly 201 is the same as the light source assembly 13 of the foregoing embodiment.

In another embodiment of the present invention, the backlight module 200 is adjacent to the liquid crystal panel 300, the backlight module 200 includes an adjacent light source assembly 201 and a light guide assembly 202, and the light guide assembly 202 includes a first light guide 210 and a second light guide. Light portion 220; the light of the light source assembly 201 can enter the first light guide portion 210 from one side of the light guide assembly 202, and then reach the second light guide portion 220; or, the light of the light source assembly 201 can be far away from the light guide assembly 202 One side of the liquid crystal panel 300 enters the first light guide portion 210 and the second light guide portion 220; part of the light from the light source assembly 201 passes through the first light guide portion 210 to reach the liquid crystal panel 300, and another part of the light passes through the first light guide portion 210 and The second light guide 220 reaches the liquid crystal panel 300; or, a part of the light of the light source assembly 201 reaches the liquid crystal panel 300 through the first light guide 210, and another part of the light reaches the liquid crystal panel 300 through the second light guide 220. The minimum distance between any position of the second light guide portion 220 and the liquid crystal panel 300 is smaller than the minimum distance between any position of the first light guide portion 210 and the liquid crystal panel 300; the light from the light source assembly 201 reaches the liquid crystal through the first light guide portion 210 The optical path of the panel 300 is different from the optical path of the light from the light source assembly 201 to the liquid crystal panel 300 through the second light guide portion 220, and the attenuation of the light from the light source assembly 201 to the liquid crystal panel 300 through the first light guide portion 210 is different from that of the light source assembly 201 The light passing through the second light guide 220 reaches the attenuation of the liquid crystal panel 300. The first light guide portion 210 is provided with a plurality of first uniform light structures 211. The first uniform light structure 211 adjusts the brightness of the light from the light source assembly 201 reaching the liquid crystal panel 300 through the first light guide portion 210, and the second light guide portion 220 is provided There are a plurality of second uniform light structures 221. The second uniform light structure 221 adjusts the brightness of the light from the light source assembly 201 reaching the liquid crystal panel 300 through the second light guide portion 220, so that the light from the light source assembly 201 respectively passes through the first light guide portion 210 and the second light guide portion 220 reach the liquid crystal panel 300 with uniform brightness, so as to prevent the attenuation of the light from the light source assembly 201 through the first light guide portion 210 and the attenuation difference of the light from the light source assembly 201 through the second light guide portion 220 resulting in the liquid crystal panel The 300 has uneven brightness.

As shown in FIGS. 9A and 9B, the first light guide portion 210 and the second light guide portion 220 are integrally formed to form the light guide assembly 202.

In another embodiment of the present invention, the first light guide part 210 and the second light guide part 220 are integrally formed to form the light guide assembly 202; the light from the light source assembly 201 can first enter the first light guide from one side of the light guide assembly 202 Part 210, and then reach the second light guide part 220; or, the light of the light source assembly 201 can enter the first light guide part 210 and the second light guide part 220 from the side of the light guide assembly 202 away from the liquid crystal panel 300; the light source assembly 201 A part of the light reaches the liquid crystal panel 300 through the first light guide part 210, and another part of the light reaches the liquid crystal panel 300 through the first light guide part 210 and the second light guide part 220; or, a part of the light from the light source assembly 201 passes through the first light guide The portion 210 reaches the liquid crystal panel 300, and another part of the light reaches the liquid crystal panel 300 through the second light guide portion 220.

As shown in FIGS. 9A, 9B and 10, the first light guide portion 210 and the second light guide portion 220 are connected to each other to form a light guide assembly 202.

In another embodiment of the present invention, the first light guide part 210 and the second light guide part 220 are connected to each other to form the light guide assembly 202; the light from the light source assembly 201 can first enter the first light guide from one side of the light guide assembly 202 Part 210, and then reach the second light guide part 220; or, the light of the light source assembly 201 can enter the first light guide part 210 and the second light guide part 220 from the side of the light guide assembly 202 away from the liquid crystal panel 300; the light source assembly 201 A part of the light reaches the liquid crystal panel 300 through the first light guide part 210, and another part of the light reaches the liquid crystal panel 300 through the first light guide part 210 and the second light guide part 220; or, a part of the light from the light source assembly 201 passes through the first light guide The portion 210 reaches the liquid crystal panel 300, and another part of the light reaches the liquid crystal panel 300 through the second light guide portion 220.

FIG. 10 is a schematic structural diagram of a backlight module provided by another embodiment of the present invention.

As shown in FIG. 10, the light guide assembly 202 further includes a light guide plate connection part 230 located between the first light guide part 210 and the second light guide part 220, and the light guide plate connection part 230 is provided with a plurality of third uniform light structures 231 The third uniform light structure 231 is used to make the light of the light source assembly 201 pass through the light guide plate connection part 230 and the first light guide part 210 and the second light guide part 220 to reach the liquid crystal panel 300 with uniform brightness.

In another embodiment of the present invention, the light of the light source assembly 201 may first enter the first light guide part 210 from one side of the light guide assembly 202, and then reach the light guide plate connection part 230 and the second light guide part 220; or, the light source The light of the component 201 can enter the first light guide 210, the light guide plate connecting portion 230 and the second light guide 220 from the side of the light guide 202 away from the liquid crystal panel 300; a part of the light of the light source component 201 passes through the first light guide 210 reaches the liquid crystal panel 300, another part of the light reaches the liquid crystal panel 300 through the first light guide part 210 and the light guide plate connection part 230, and another part of light passes through the first light guide part 210, the light guide plate connection part 230 and the second light guide part 220 Reach the liquid crystal panel 300; or, a part of the light of the light source assembly 201 reaches the liquid crystal panel 300 through the first light guide part 210, another part of the light reaches the liquid crystal panel 300 through the light guide plate connection part 230, and another part of the light reaches the liquid crystal panel 300 through the second light guide part 220 LCD panel 300. The light path of the light source assembly 201 through the light guide plate connecting portion 230 to the liquid crystal panel 300 is different from the light path of the light source assembly 201 through the first light guide portion 210 to the liquid crystal panel 300, and it is also different from the light path of the light source assembly 201 through the first light guide portion 210. The second light guide portion 220 reaches the optical path of the liquid crystal panel 300. The attenuation of the light from the light source assembly 201 to the liquid crystal panel 300 through the light guide plate connection 230 is different from the attenuation of the light from the light source assembly 201 to the liquid crystal panel 300 through the first light guide 210, and is also different from the attenuation of the light from the light source assembly 201 through the second guide. The attenuation of the light portion 220 reaching the liquid crystal panel 300. The light guide plate connection part 230 is provided with a plurality of third light homogenization structures 231, and the third light homogenization structure 231 adjusts the brightness of the light from the light source assembly 201 passing through the light guide plate connection part 230 to the liquid crystal panel 300. The third uniform light structure 231 is used to make the light from the light source assembly 201 pass through the light guide plate connecting portion 230 and the first light guide portion 210 and the second light guide portion 220 to reach the liquid crystal panel 300 with uniform brightness, so as to prevent the light from the light source assembly 201 from passing through The difference between the attenuation of the first light guide part 210, the attenuation through the light guide plate connection part 230, and the attenuation through the second light guide part 220 results in uneven brightness of the liquid crystal panel 300.

FIG. 11 is a schematic structural diagram of a backlight module provided by another embodiment of the present invention.

As shown in FIG. 11, the first uniform light structure 211 is non-uniformly distributed in the first light guide portion 210.

In another embodiment of the present invention, when the light of the light source assembly 201 enters the first light guide part 210 from one side of the light guide assembly 202, the light of the light source assembly 201 reaches the liquid crystal panel through different positions in the first light guide part 210. The light path of the light source assembly 201 is different, and the attenuation of the light from the light source assembly 201 to the liquid crystal panel 300 through different positions in the first light guide portion 210 is different. The first uniform light structure 211 is non-uniformly distributed in the first light guide portion 210. The first uniform light structure 211 adjusts the brightness of the light from the light source assembly 201 to reach the liquid crystal panel 300 through different positions in the first light guide portion 210, so that The light from the light source assembly 201 passes through different positions in the first light guide 210 to reach the liquid crystal panel 300 with uniform brightness.

FIG. 12 is a schematic structural diagram of a backlight module provided by another embodiment of the present invention.

As shown in FIGS. 11 and 12, the density or size of the first uniform light structure 211 at any position in the first light guide portion 210 is positively correlated with the optical path of the light from the light source assembly 201 reaching that position in the first light guide portion 210 , And positively correlated with the minimum distance from the position in the first light guide portion 210 to the liquid crystal panel 300.

In another embodiment of the present invention, when the light of the light source assembly 201 enters the first light guide part 210 from one side of the light guide assembly 202, the light of the light source assembly 201 reaches the liquid crystal panel through different positions in the first light guide part 210. The light path of the light source assembly 201 is different, and the attenuation of the light from the light source assembly 201 to the liquid crystal panel 300 through different positions in the first light guide portion 210 is different. In the backlight module 200, the density or size of the first uniform light structure 211 at any position in the first light guide portion 210 is positively correlated with the optical path of the light from the light source assembly 201 reaching that position in the first light guide portion 210. And it is positively correlated with the minimum distance from the position in the first light guide portion 210 to the liquid crystal panel 300; at any position in the first light guide portion 210, the light from the light source assembly 201 reaches the position in the first light guide portion 210 The greater the optical path, the greater the density or size of the first homogenizing structure 211 at that position in the first light guide 210, and the greater the minimum distance from this position in the first light guide 210 to the liquid crystal panel 300, The greater the density or size of the first uniform light structure 211 at this position in a light guide portion 210; on the one hand, the greater the density or size of the first uniform light structure 211 at this position in the first light guide portion 210, The higher the light extraction rate at this position in the light guide part 210; on the other hand, the longer the light path of the light from the light source assembly 201 reaches this position in the first light guide part 210, the light from the light source assembly 201 travels from the light source assembly 201 to the first The greater the attenuation of this position in the light guide portion 210, and the greater the minimum distance from this position in the first light guide portion 210 to the liquid crystal panel 300, the greater the light from the light source assembly 201 from this position in the first light guide portion 210 to the liquid crystal The greater the attenuation of the panel 300; here, the light output rate of each position in the first light guide 210 is changed to compensate for the attenuation difference of the light from the light source assembly 201 to the first light guide 210 and the light source assembly 201 The attenuation difference of the light from each position in the first light guide portion 210 to the liquid crystal panel 300 so that the light from the light source assembly 201 passes through each position in the first light guide portion 210 to reach the liquid crystal panel 300 with uniform brightness.

FIG. 13 is a schematic structural diagram of a backlight module provided by another embodiment of the present invention.

As shown in FIG. 13, the second uniform light structure 221 is non-uniformly distributed in the second light guide portion 220.

In another embodiment of the present invention, when the light of the light source assembly 201 enters the first light guide part 210 from one side of the light guide assembly 202 to the second light guide part 220, the light of the light source assembly 201 passes through the second light guide part 220. Different positions in 220 reach the liquid crystal panel 300 with different optical paths, and the light from the light source assembly 201 passes through different positions in the second light guide 220 to reach the liquid crystal panel 300 at different attenuation. The second uniform light structure 221 is non-uniformly distributed in the second light guide portion 220. The second uniform light structure 221 adjusts the brightness of the light from the light source assembly 201 to reach the liquid crystal panel 300 through different positions in the second light guide portion 220, so that The light from the light source assembly 201 passes through different positions in the second light guide 220 to reach the liquid crystal panel 300 with uniform brightness.

FIG. 14 is a schematic structural diagram of a backlight module provided by another embodiment of the present invention.

As shown in FIGS. 13 and 14, the minimum distance from each position of the second light guide portion 220 to the liquid crystal panel 300 is equal, and the density or size of the second uniform light structure 221 at any position of the second light guide portion 220 is the same as the light source assembly The optical path of the light of 201 reaching the position in the second light guide 220 is positively correlated.

In another embodiment of the present invention, when the light of the light source assembly 201 enters the first light guide part 210 from one side of the light guide assembly 202, the light of the light source assembly 201 reaches the liquid crystal panel through different positions in the second light guide part 220. The light path of the light source assembly 201 is different, and the attenuation of the light from the light source assembly 201 to the liquid crystal panel 300 through different positions in the second light guide 220 is different. In the backlight module 200, the minimum distance from each position in the second light guide portion 220 to the liquid crystal panel 300 is the same, and the light of the light source assembly 201 has the same attenuation from each position in the second light guide portion 220 to the liquid crystal panel 300. The size of the second uniform light structure 221 at any position in the second light guide portion 220 is positively correlated with the optical path of the light from the light source assembly 201 reaching that position in the second light guide portion 220; any position in the second light guide portion 220 At a position, the greater the optical path of the light from the light source assembly 201 to the position in the second light guide 220, the greater the density or size of the second uniform light structure 221 at that position in the second light guide 220; , The greater the density or size of the second uniform light structure 221 at this position in the second light guide portion 220, the higher the light extraction rate at this position in the second light guide portion 220; on the other hand, the light from the light source assembly 201 reaches the first The greater the optical length of the position in the second light guide 220, the greater the attenuation of the light from the light source assembly 201 from the light source assembly 201 to the position in the second light guide 220; here, change the position of the second light guide 220 The light output rate compensates for the attenuation difference of the light of the light source assembly 201 from the light source assembly 201 to the second light guide portion 220, so that the light of the light source assembly 201 reaches the brightness of the liquid crystal panel 300 through each position in the second light guide portion 220 Evenly.

As shown in FIGS. 9A to 14, in the backlight module 200, the first uniform light structure 211, the second uniform light structure 221, and the third uniform light structure 231 have light guiding particle structures and are respectively disposed in the first light guiding portion 210 , The second light guide portion 220 and the light guide plate connection portion 230.

In another embodiment of the present invention, in the backlight module 200, the first uniform light structure 211, the second uniform light structure 221, and the third uniform light structure 231 have light guiding particle structures and are respectively disposed in the first light guiding portion 210. In the second light guide portion 220 and the light guide plate connection portion 230, when the light of the light source assembly 201 enters the first light guide portion 210 from one side of the light guide assembly 202, the light guide particle structure of the first uniform light structure 211 Adjust the brightness of the light of the light source assembly 201 from the light source assembly 201 to the first light guide 210, and then adjust the brightness of the light of the light source assembly 201 from the first light guide 210 to the liquid crystal panel 300, and the light guide of the second uniform light structure 221 The particle structure adjusts the brightness of the light source assembly 201 from the light source assembly 201 to the second light guide 220, and then adjusts the brightness of the light source assembly 201 from the second light guide 220 to the liquid crystal panel 300. The third uniform light structure 231 The light guide particle structure adjusts the brightness of the light of the light source assembly 201 from the light source assembly 201 to the light guide plate connection part 230, and then adjusts the brightness of the light of the light source assembly 201 from the light guide plate connection part 230 to the liquid crystal panel 300. The first uniform light structure 211, The light guide particle structures of the second uniform light structure 221 and the third uniform light structure 231 respectively change the light output rate of the first light guide portion 210, the light output rate of the second light guide portion 220, and the light output rate of the light guide plate connection portion 230 to compensate The attenuation difference of the light from the light source assembly 201 from the light source assembly 201 to the first light guide portion 210, the second light guide portion 220, and the light guide plate connecting portion 230 and the light from the light source assembly 201 from the first light guide portion 210 and the second light guide The attenuation difference between the light guide plate connecting portion 230 and the liquid crystal panel 300, so that the light from the light source assembly 201 passes through the first light guide portion 210, the second light guide portion 220, and the light guide plate connection portion 230 to reach the liquid crystal panel 300 with uniform brightness .

FIG. 15 is a schematic structural diagram of a backlight module provided by another embodiment of the present invention.

As shown in FIG. 15, in the backlight module 200, the first uniform light structure 211, the second uniform light structure 221, and the third uniform light structure 231 have a convex light guide structure and are respectively disposed on the first light guide part 210 The surface, the surface of the second light guide portion 220, and the surface of the light guide plate connection portion 230.

In another embodiment of the present invention, in the backlight module 200, the first uniform light structure 211, the second uniform light structure 221, and the third uniform light structure 231 have convex light guide structures and are respectively disposed on the first light guide structure. When the light from the light source assembly 201 enters the first light guide 210 from one side of the light guide assembly 202, the first uniform light structure The convex light guide structure of 211 adjusts the brightness of the light from the light source assembly 201 from the light source assembly 201 to the first light guide portion 210, and then adjusts the brightness of the light from the light source assembly 201 from the first light guide portion 210 to the liquid crystal panel 300, and the second The convex light guide structure of the uniform light structure 221 adjusts the brightness of the light from the light source assembly 201 from the light source assembly 201 to the second light guide 220, and then adjusts the brightness of the light from the light source assembly 201 from the second light guide 220 to the liquid crystal panel 300 The protruding light guide structure of the third homogenizing structure 231 adjusts the brightness of the light from the light source assembly 201 from the light source assembly 201 to the light guide plate connection part 230, and then adjusts the light from the light source assembly 201 from the light guide plate connection part 230 to the liquid crystal panel 300 Brightness, the convex light guide structures of the first uniform light structure 211, the second uniform light structure 221, and the third uniform light structure 231 change the light output rate of the first light guide portion 210, the light output rate of the second light guide portion 220, The light output rate of the light guide plate connection part 230 compensates for the attenuation difference of the light source assembly 201 from the light source assembly 201 to the first light guide part 210, the second light guide part 220, the light guide plate connection part 230 and the light source assembly 201 from the first The attenuation difference between a light guide portion 210, a second light guide portion 220, a light guide plate connecting portion 230 and a liquid crystal panel 300, so that the light from the light source assembly 201 passes through the first light guide portion 210, the second light guide portion 220, and the light guide plate The brightness of the connecting portion 230 reaching the liquid crystal panel 300 is uniform.

FIG. 16 is a schematic structural diagram of a backlight module provided by another embodiment of the present invention.

As shown in FIG. 16, in the backlight module 200, the first uniform light structure 211, the second uniform light structure 221, and the third uniform light structure 231 have recessed light guide structures and are respectively disposed on the surface of the first light guide portion 210 , The surface of the second light guide portion 220 and the surface of the light guide plate connection portion 230.

In another embodiment of the present invention, in the backlight module 200, the first uniform light structure 211, the second uniform light structure 221, and the third uniform light structure 231 have recessed light guide structures and are respectively disposed in the first light guide portion When the light from the light source assembly 201 enters the first light guide 210 from one side of the light guide assembly 202, the first uniform light structure 211 The recessed light guide structure adjusts the brightness of the light source assembly 201 from the light source assembly 201 to the first light guide portion 210, and then adjusts the brightness of the light source assembly 201 from the first light guide portion 210 to the liquid crystal panel 300, and the second uniform light The recessed light guide structure of the structure 221 adjusts the brightness of the light from the light source assembly 201 from the light source assembly 201 to the second light guide 220, and then adjusts the brightness of the light from the light source assembly 201 from the second light guide 220 to the liquid crystal panel 300, and the third The recessed light guide structure of the uniform light structure 231 adjusts the brightness of the light of the light source assembly 201 from the light source assembly 201 to the light guide plate connection part 230, and further adjusts the brightness of the light of the light source assembly 201 from the light guide plate connection part 230 to the liquid crystal panel 300, first The recessed light guide structures of the uniform light structure 211, the second uniform light structure 221, and the third uniform light structure 231 respectively change the light output rate of the first light guide portion 210, the light output rate of the second light guide portion 220, and the light guide plate connection portion 230. The light output rate of the light source assembly 201 is compensated for the attenuation difference of the light from the light source assembly 201 to the first light guide part 210, the second light guide part 220, and the light guide plate connection part 230, and the light from the light source assembly 201 flows from the first light guide part 210 The attenuation difference between the second light guide portion 220, the light guide plate connection portion 230 and the liquid crystal panel 300, so that the light from the light source assembly 201 reaches the liquid crystal through the first light guide portion 210, the second light guide portion 220, and the light guide plate connection portion 230 The brightness of the panel 300 is uniform.

FIG. 17 is a schematic structural diagram of a backlight module provided by another embodiment of the present invention; FIG. 18 is a schematic structural diagram of a backlight module provided by another embodiment of the present invention; FIG. 19 is a backlight module provided by another embodiment of the present invention Schematic diagram of the structure.

As shown in FIGS. 9A, 17 to 19, in the backlight module 200, the first uniform light structure 211, the second uniform light structure 221, and the third uniform light structure 231 have one of rectangular, triangular, circular, and elliptical shapes. By.

In another embodiment of the present invention, in the backlight module 200, the first uniform light structure 211, the second uniform light structure 221, and the third uniform light structure 231 have one of rectangular, triangular, circular, and elliptical shapes. When the light of the light source assembly 201 enters the first light guide portion 210 from one side of the light guide assembly 202, the rectangular, triangular, circular, or elliptical first uniform light structure 211 adjusts the light source assembly 201 to flow from the light source assembly 201 To the brightness of the first light guide portion 210, and then adjust the brightness of the light from the first light guide portion 210 to the liquid crystal panel 300 of the light source assembly 201, the second uniform light structure 221 of rectangle, triangle, circle, and ellipse adjusts the light source assembly The brightness of the light of 201 from the light source assembly 201 to the second light guide 220, and then adjust the brightness of the light of the light source assembly 201 from the second light guide 220 to the liquid crystal panel 300, the third is rectangular, triangular, circular, and oval. The uniform light structure 231 adjusts the brightness of the light source assembly 201 from the light source assembly 201 to the light guide plate connection part 230, and then adjusts the brightness of the light source assembly 201 from the light guide plate connection part 230 to the liquid crystal panel 300, rectangular, triangular, circular, The elliptical first uniform light structure 211, the second uniform light structure 221, and the third uniform light structure 231 respectively change the light output rate of the first light guide portion 210, the light output rate of the second light guide portion 220, and the light guide plate connecting portion 230. The light output rate of the light source assembly 201 is compensated for the attenuation difference of the light from the light source assembly 201 to the first light guide part 210, the second light guide part 220, and the light guide plate connection part 230, and the light from the light source assembly 201 flows from the first light guide part 210 The attenuation difference between the second light guide portion 220, the light guide plate connection portion 230 and the liquid crystal panel 300, so that the light from the light source assembly 201 reaches the liquid crystal through the first light guide portion 210, the second light guide portion 220, and the light guide plate connection portion 230 The brightness of the panel 300 is uniform.

20 is a schematic structural diagram of an optical fingerprint system according to another embodiment of the present invention.

As shown in FIG. 20, the under-screen optical fingerprint system 400 is applied to an electronic device including a liquid crystal panel 300 and a backlight module 200; the liquid crystal panel 300 includes adjacent display areas AA and non-display areas NA; The minimum distance between the display area NA is greater than the minimum distance between the backlight module 200 and the display area AA; the under-screen optical fingerprint system 400 includes an optical fingerprint recognition module 410, which is arranged in the backlight module 200 and the non-display area NA between.

In another embodiment of the present invention, the minimum distance between the backlight module 200 and the non-display area NA is greater than the minimum distance between the backlight module 200 and the display area AA, so as to form an accommodation space between the backlight module 200 and the non-display area NA The optical fingerprint recognition module 410 is arranged between the backlight module 200 and the non-display area NA, so as to receive optical fingerprint signals between the backlight module 200 and the non-display area NA. When a finger touches the surface of the liquid crystal panel 300 away from the backlight module 200, the light of the backlight module 200 is reflected by the finger through the liquid crystal panel 300 to the optical fingerprint recognition module 410; the optical fingerprint recognition module 410 receives the optical fingerprint signal so as to Perform fingerprint recognition.

As shown in FIG. 20, the backlight module 200 includes a first backlight area BL1, a second backlight area BL2, and a third backlight area BL3; the first backlight area BL1 is arranged opposite to the non-display area NA, and the second backlight area BL2 and the third backlight area The backlight area BL3 is arranged opposite to the display area AA, the minimum distance between the first backlight area BL1 and the non-display area NA is greater than the minimum distance between the third backlight area BL3 and the display area AA, and the second backlight area BL2 is connected to and connected to the first backlight area BL1 The third backlight area BL3.

In another embodiment of the present invention, the first backlight area BL1 is arranged opposite to the non-display area NA, the second backlight area BL2 and the third backlight area BL3 are arranged opposite to the display area AA, and the first backlight area BL1 is opposite to the non-display area NA. The minimum distance between the third backlight area BL3 and the display area AA is greater than the minimum distance between the third backlight area BL3 and the display area AA, so that the optical fingerprint recognition module 410 is arranged between the backlight module 200 and the non-display area NA, so that the Receive optical fingerprint signals from time to time. The second backlight area BL2 is connected to the first backlight area BL1 and to the third backlight area BL3, so that the backlight light continuously passes through the first backlight area BL1, the second backlight area BL2, and the third backlight area BL3 to reach the liquid crystal panel 300.

As shown in FIG. 20, the light guide assembly 202 is bent toward the side away from the liquid crystal panel 300 at the second backlight area BL2, the first light guide portion 210 is located in the second backlight area BL2, and the second light guide portion 220 is located in the third backlight area. Backlight area BL3.

In another embodiment of the present invention, the light guide assembly 202 is bent toward the side away from the liquid crystal panel 300 at the second backlight area BL2, the first light guide portion 210 is located in the second backlight area BL2, and the second light guide portion 220 Located in the third backlight area BL3, so that the minimum distance between the first backlight area BL1 and the non-display area NA is greater than the minimum distance between the third backlight area BL3 and the display area AA, so as to be arranged between the backlight module 200 and the non-display area NA The optical fingerprint identification module 410 is used to receive optical fingerprint signals between the backlight module 200 and the non-display area NA.

As shown in FIGS. 9A, 9B and 20, the light source assembly 201 is located on the side of the first light guide portion 210 away from the second light guide portion 220, or on the side of the light guide assembly 202 away from the liquid crystal panel 300.

In another embodiment of the present invention, the light source assembly 201 is located on the side of the first light guide part 210 away from the second light guide part 220, or on the side of the light guide assembly 202 away from the liquid crystal panel 300; the light of the light source assembly 201 can be From the side of the light guide assembly 202, enter the first light guide portion 210 first, and then reach the second light guide portion 220; or, the light of the light source assembly 201 may enter the first light guide portion from the side of the light guide assembly 202 away from the liquid crystal panel 300 Light part 210 and second light guide part 220; part of the light of the light source assembly 201 reaches the liquid crystal panel 300 through the first light guide part 210, and another part of the light reaches the liquid crystal panel 300 through the first light guide part 210 and the second light guide part 220 Or, part of the light of the light source assembly 201 reaches the liquid crystal panel 300 through the first light guide 210, and another part of the light reaches the liquid crystal panel 300 through the second light guide 220.

As shown in FIG. 20, the backlight module 200 further includes a reflective film 203, a diffuser 204, a lower prism film 205, an upper prism film 206, and an iron frame 207; the iron frame 207 accommodates the light source assembly 201, the light guide assembly 202, and the reflective film 203 , The diffuser 204, the lower prism film 205, the upper prism film 206; the reflective film 203 is arranged on the side of the light guide assembly 202 away from the liquid crystal panel 300, the diffuser 204, the lower prism film 205, and the upper prism film 206 are sequentially arranged on the light guide The assembly 202 is close to one side of the liquid crystal panel 300.

In another embodiment of the present invention, the reflective film 203, the light guide assembly 202, the diffuser 204, the lower prism film 205, and the upper prism film 206 are arranged from bottom to top in the iron frame 207, and the side of the reflective film 203, the guide The side of the light assembly 202, the side of the diffusion sheet 204, the side of the lower prism film 205, or the side of the upper prism film 206 and the side of the iron frame 206 are fixed by iron frame encapsulation 208. The bottom and sides of the iron frame 206 are closed, and the upper prism film 205 is exposed on the upper part of the iron frame 206. The light from the light source assembly 201 enters the light guide assembly 202, and a part of it first turns to propagate upward, and then reaches the liquid crystal panel 300 through the diffuser 204, the lower prism film 205, and the upper prism film 206. The reflection at 203 passes through the light guide assembly 202, the diffusion sheet 204, the lower prism film 205, and the upper prism film 206 to reach the liquid crystal panel 300.

As shown in FIG. 20, the reflective film 203, the diffusion sheet 204, the lower prism film 205, the upper prism film 206, and the iron frame 207 are bent toward the side away from the liquid crystal panel 300 at the second backlight area BL2.

In another embodiment of the present invention, the reflective film 203, the diffusion sheet 204, the lower prism film 205, the upper prism film 206, and the iron frame 207 are bent toward the side away from the liquid crystal panel 300 at the second backlight area BL2 to make The minimum distance between the first backlight area BL1 and the non-display area NA is greater than the minimum distance between the third backlight area BL3 and the display area AA, so that an optical fingerprint recognition module 410 is disposed between the backlight module 200 and the non-display area NA, so as to The optical fingerprint signal is received between the backlight module 200 and the non-display area NA.

As shown in FIG. 20, the light from the light source assembly 201 reaches the optical fingerprint recognition module 410 when reflected on the surface of the liquid crystal panel 300 away from the backlight module 200.

In another embodiment of the present invention, when a finger touches the surface of the liquid crystal panel 300 away from the backlight module 200, the light of the backlight module 200 is reflected by the finger to the optical fingerprint recognition module 410 through the liquid crystal panel 300; optical fingerprint recognition The module 410 receives the optical fingerprint signal to perform fingerprint identification.

As shown in FIG. 21, the display module 500 includes an adjacent backlight module 200 and a liquid crystal panel 300. The backlight module 200 includes an adjacent light source assembly 201 and a light guide assembly 202; the light guide assembly 202 includes a first light guide Section 210 and the second light guide section 220; in the vertical direction of the liquid crystal panel 300, the minimum distance between any position of the second light guide section 220 and the liquid crystal panel 300 is smaller than any position of the first light guide section 210 and the liquid crystal panel The minimum pitch of 300; the first light guide portion 210 is provided with a plurality of first uniform light structures 211, the second light guide portion 220 is provided with a plurality of second uniform light structures 221, the first uniform light structure 211 and the second uniform light The structure 221 is used to make the light from the light source assembly 201 pass through the first light guide portion 210 and the second light guide portion 220 to reach the liquid crystal panel 300 with uniform brightness.

Another embodiment of the present invention provides an electronic device. The electronic device includes the under-screen optical fingerprint system in any of the above embodiments. The electronic device may specifically be a liquid crystal display device, electronic paper, mobile phone, tablet computer, TV, etc. Electronic products or components such as laptops, digital photo frames, navigators, fingerprint locks, etc.

In summary, the present invention provides a backlight module, an under-screen optical fingerprint system, a display module and an electronic device. The backlight module is adjacent to the liquid crystal panel, the backlight module includes adjacent light source components and light guide components; the light guide component includes a first light guide part and a second light guide part; in the vertical direction of the liquid crystal panel, the second light guide part The minimum distance between any position in the first light guide part and the liquid crystal panel is smaller than the minimum distance between any position in the first light guide part and the liquid crystal panel; the first light guide part is provided with a plurality of first uniform light structures, and the second light guide part is provided with more A second uniform light structure, the first uniform light structure and the second uniform light structure are used to make the light of the light source assembly pass through the first light guide portion and the second light guide portion to reach the liquid crystal panel with uniform brightness. In the present invention, the first uniform light structure and the second uniform light structure prevent the attenuation of the light from the light source assembly through the first light guide and the difference between the attenuation of the light from the light source assembly through the second light guide and cause the brightness of the liquid crystal panel to be different. all.

The above descriptions are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the present invention Within the scope of protection.

Claims

A backlight module, adjacent to a liquid crystal panel, characterized in that the backlight module includes adjacent light source components and light guide components;

The light guide assembly includes a first light guide part and a second light guide part;

In the vertical direction of the liquid crystal panel, the minimum distance between any position in the second light guide portion and the liquid crystal panel is smaller than the minimum distance between any position in the first light guide portion and the liquid crystal panel;

The first light guide portion is provided with a plurality of first uniform light structures, the second light guide portion is provided with a plurality of second uniform light structures, and the first uniform light structure and the second uniform light structure are used Therefore, the light from the light source assembly passes through the first light guide portion and the second light guide portion to reach the liquid crystal panel with uniform brightness.
5. The backlight module of claim 1, wherein the first light guide portion and the second light guide portion are integrally formed to form the light guide assembly.
5. The backlight module of claim 1, wherein the first light guide portion and the second light guide portion are connected to each other to form the light guide assembly.
The backlight module according to claim 1, wherein the light guide assembly further comprises a light guide plate connection part located between the first light guide part and the second light guide part, the light guide plate The connection part is provided with a plurality of third light homogenization structures, and the third light homogenization structure is used to make the light of the light source assembly pass through the light guide plate connection part and the first light guide part and the second light guide respectively. The brightness of the light portion reaching the liquid crystal panel is uniform.
The backlight module of claim 1, wherein the first uniform light structure is non-uniformly distributed in the first light guide portion.
The backlight module according to claim 1, wherein the density or size of the first uniform light structure at any position in the first light guide part and the light from the light source assembly reach the first The optical path of the position in the light guide portion is positively correlated, and is positively correlated with the minimum distance from the position in the first light guide portion to the liquid crystal panel.
The backlight module of claim 1, wherein the second uniform light structure is non-uniformly distributed in the second light guide portion.
The backlight module of claim 1, wherein the minimum distance from each position in the second light guide portion to the liquid crystal panel is equal, and the first light guide portion at any position in the second light guide portion The density or size of the two uniform light structures is positively correlated with the optical path of the light from the light source assembly reaching the position in the second light guide portion.
The backlight module of claim 4, wherein the first uniform light structure, the second uniform light structure, and the third uniform light structure have light guiding particle structures and are respectively disposed on the first A light guide part, the second light guide part, and the light guide plate connecting part.
The backlight module of claim 4, wherein the first uniform light structure, the second uniform light structure, and the third uniform light structure have convex light guide structures and are respectively disposed on the The surface of the first light guide portion, the surface of the second light guide portion, and the surface of the light guide plate connection portion.
The backlight module according to claim 4, wherein the first uniform light structure, the second uniform light structure, and the third uniform light structure have recessed light guide structures and are respectively disposed on the first The surface of a light guide part, the surface of the second light guide part, and the surface of the light guide plate connection part.
The backlight module of claim 4, wherein the first uniform light structure, the second uniform light structure, and the third uniform light structure have a rectangular shape, a triangular shape, a circular shape, and an oval shape. One.
An under-screen optical fingerprint system, characterized in that it is applied to an electronic device including a liquid crystal panel and the backlight module according to any one of claims 1 to 12; the liquid crystal panel includes adjacent display areas and non- Display area;

The minimum distance between the backlight module and the non-display area is greater than the minimum distance between the backlight module and the display area;

The under-screen optical fingerprint system includes an optical fingerprint identification module, and the optical fingerprint identification module is disposed between the backlight module and the non-display area.
The under-screen optical fingerprint system according to claim 13, wherein the backlight module comprises a first backlight area, a second backlight area, and a third backlight area;

The first backlight area and the non-display area are arranged opposite to each other, the second backlight area and the third backlight area are arranged opposite to the display area, and the minimum between the first backlight area and the non-display area is The distance is greater than the minimum distance between the third backlight area and the display area, and the second backlight area is connected to the first backlight area and connected to the third backlight area.
The under-screen optical fingerprint system according to claim 14, wherein the light guide component is bent toward a side away from the liquid crystal panel at the second backlight area, and the first light guide The portion is located in the second backlight area, and the second light guide portion is located in the third backlight area.
The under-screen optical fingerprint system according to claim 14, wherein the light source assembly is located on the side of the first light guide part away from the second light guide part, or is located at the side of the light guide part away from the second light guide part. The side of the LCD panel.
The under-screen optical fingerprint system of claim 14, wherein the backlight module further comprises a reflective film, a diffuser, a lower prism film, an upper prism film, and an iron frame;

The iron frame accommodates the light source assembly, the light guide assembly, the reflective film, the diffusion sheet, the lower prism film, and the upper prism film;

The reflective film is arranged on the side of the light guide assembly away from the liquid crystal panel, and the diffuser, the lower prism film, and the upper prism film are successively arranged on the side of the light guide assembly close to the liquid crystal panel .
The under-screen optical fingerprint system according to claim 17, wherein the reflective film, the diffusion sheet, the lower prism film, and the upper prism film face away from each other at the second backlight area One side of the liquid crystal panel is bent.
The under-screen optical fingerprint system according to claim 14, wherein the light from the light source assembly reaches the optical fingerprint recognition module when it reflects off the surface of the liquid crystal panel away from the backlight module.
A display module includes adjacent backlight modules and liquid crystal panels, wherein the backlight module includes adjacent light source components and light guide components;

The light guide assembly includes a first light guide part and a second light guide part;

In the vertical direction of the liquid crystal panel, the minimum distance between any position in the second light guide portion and the liquid crystal panel is smaller than the minimum distance between any position in the first light guide portion and the liquid crystal panel;

The first light guide portion is provided with a plurality of first uniform light structures, the second light guide portion is provided with a plurality of second uniform light structures, and the first uniform light structure and the second uniform light structure are used Therefore, the light from the light source assembly passes through the first light guide portion and the second light guide portion to reach the liquid crystal panel with uniform brightness.
An electronic device, characterized by comprising the under-screen optical fingerprint system according to any one of claims 13 to 19.