CN214896127U - Backlight module, display panel and terminal - Google Patents

Abstract

The disclosure relates to a backlight module, a display panel and a terminal. The backlight module of the present disclosure includes; the first light guide plate can be in an atomized state or a transparent state under the triggering of an electric signal; the first light source is arranged on the side surface of the first light guide plate and used for emitting light to the first light guide plate; the light condensing part is arranged above the first light guide plate, and light rays emitted by the first light guide plate enter the light condensing part and are emitted out in a manner of being vertical to the light emitting surface after passing through the light condensing part; when the first light guide plate is in a transparent state, external light rays sequentially pass through the light condensing part and the first light guide plate to enter the lower part of the first light guide plate, and the light path of the external light rays is not changed when the external light rays pass through the light condensing part; when the first light guide plate is in the atomized state, the light emitted by the first light source enters the light-gathering component through the first light guide plate and is emitted out in a manner of being vertical to the light-emitting surface of the light-gathering component. The display screen can avoid the condition of uneven display brightness.

Description

Backlight module, display panel and terminal

Technical Field

The present disclosure relates to the display field, and in particular, to a backlight module, a display panel and a terminal.

Background

With the increasing use demand of users for display areas, more and more full-screen electronic devices are currently on the market. Generally, a flexible screen is adopted in the full-screen electronic equipment, but the flexible screen is expensive and complex in process, and the manufacturing process of the flexible screen is not mature enough.

Compared with a flexible screen, the development of a rigid screen is more mature, and the current market still uses a rigid screen electronic device as a main product. Usually, a circle of light source is arranged around the camera module to serve as an independent backlight module, so that the problem of backlight loss of a camera hole part under a screen is solved.

However, such an arrangement may cause non-uniformity of the brightness of the display area, and may seriously affect the display effect and the use experience.

SUMMERY OF THE UTILITY MODEL

To overcome the problems in the related art, the present disclosure provides a backlight module, a display panel and a terminal.

According to a first aspect of the embodiments of the present disclosure, there is provided a backlight module for providing backlight for a display screen, the backlight module comprising; the first light guide plate can be in an atomized state or a transparent state under the triggering of an electric signal; the first light source is arranged on the side surface of the first light guide plate and used for emitting light rays to the first light guide plate; the light condensing part is arranged above the first light guide plate and comprises a light emergent surface, the light emergent surface is the surface of the light condensing part, which is opposite to the first light guide plate, light emitted by the first light guide plate enters the light condensing part, and the light is emitted out perpendicularly to the light emergent surface after passing through the light condensing part; when the first light guide plate is in a transparent state, external light rays sequentially pass through the light condensing part and the first light guide plate to enter the lower part of the first light guide plate, and the light path of the external light rays is not changed when the external light rays pass through the light condensing part; when the first light guide plate is in an atomized state, light emitted by the first light source enters the light focusing component through the first light guide plate and is emitted out of the light emergent surface of the light focusing component in a direction perpendicular to the light emergent surface.

In one embodiment, the light-condensing part includes a liquid crystal lens including upper and lower substrates disposed opposite to each other, and a liquid crystal layer interposed between the upper and lower substrates; the lower substrate is arranged opposite to the first light guide plate.

In an embodiment, the light focusing part further includes a polarizer.

In one embodiment, the light condensing part further includes a first polarizing plate and a second polarizing plate; the first polarizer is disposed on the upper surface of the upper substrate, and the second polarizer is disposed on the lower surface of the lower substrate.

In one embodiment, the polarization direction of the first polarizer and the polarization direction of the second polarizer are perpendicular to each other.

In one embodiment, the backlight module further includes a second light guide plate; the second light guide plate is arranged around the first light guide plate; or, the second light guide plate is disposed at one side of the first light guide plate.

In an embodiment, the backlight module further includes a second light source, and the second light source is configured to emit light to the second light guide plate.

In one embodiment, the backlight module further includes: and the shading layer is arranged on the outer side of the second light guide plate.

According to a second aspect of the embodiments of the present disclosure, there is provided a display panel including: a display screen, wherein the display screen comprises the backlight module according to any one of the preceding embodiments; and the camera is arranged below the first light guide plate.

In one embodiment, the first light guide plate is disposed at an end close to the display screen.

In one embodiment, the display screen includes a first display area, and the first display area corresponds to the first light guide plate; wherein, in the transparent state, the first display area is in a non-display state; and in the atomization state, the first display area is in a display state.

According to a third aspect of the embodiments of the present disclosure, there is provided a terminal including the display panel according to any one of the preceding embodiments.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: this backlight unit of disclosure can be at the first light guide plate of conversion between transparent state and atomizing state through setting up for first light guide plate can become transparent when shooing, lets external light not take place the light path and change ground and get into the camera and accomplish the formation of image. And a light condensing part is arranged above the first light guide plate, and light rays emitted by the first light guide plate are emitted out in a manner of being vertical to a light emitting surface of the light condensing part by using the light condensing part, so that side view angle light leakage can be reduced. By the arrangement, the situation that the display brightness of the display screen is not uniform can be avoided.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic cross-sectional view illustrating a backlight module according to an exemplary embodiment.

Fig. 2 is a schematic cross-sectional structure diagram of a display panel according to an exemplary embodiment.

Fig. 3 is a schematic cross-sectional structure diagram of a liquid crystal lens according to an exemplary embodiment.

Fig. 4 is a schematic cross-sectional structure diagram of a liquid crystal lens according to another exemplary embodiment.

Fig. 5 is a schematic top view diagram illustrating a backlight module according to an exemplary embodiment.

Fig. 6 is a schematic top view illustrating a backlight module according to another exemplary embodiment.

Fig. 7 is a schematic top view illustrating a backlight module according to another exemplary embodiment.

Fig. 8 is a schematic diagram illustrating a display screen configuration according to an exemplary embodiment.

Fig. 9 is a schematic diagram illustrating a structure of a terminal according to an exemplary embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

With the increasing use demand of users for display areas, more and more full-screen electronic devices are currently on the market. Generally, a flexible screen is adopted in the full-screen electronic equipment, but the flexible screen is expensive and complex in process, and the manufacturing process of the flexible screen is not mature enough.

Compared with a flexible screen, the development of a rigid screen is more mature, and the current market still uses a rigid screen electronic device as a main product. Usually, a circle of light source is arranged around the camera module to serve as an independent backlight module, so that the problem of backlight loss of a camera hole part under a screen is solved.

The present disclosure provides a backlight module for providing backlight for a display screen, the backlight module comprising; the first light guide plate can be in an atomized state or a transparent state under the triggering of an electric signal; the first light source is arranged on the side surface of the first light guide plate and used for emitting light to the first light guide plate; the light condensing component is arranged above the first light guide plate and comprises a light outlet surface, the light outlet surface is the surface of the light condensing component, which is opposite to the first light guide plate, and light emitted by the first light guide plate enters the light condensing component and is emitted out in a manner of being vertical to the light outlet surface after passing through the light condensing component; when the first light guide plate is in a transparent state, external light rays sequentially pass through the light condensing part and the first light guide plate to enter the lower part of the first light guide plate, and the light path of the external light rays is not changed when the external light rays pass through the light condensing part; when the first light guide plate is in the atomized state, the light emitted by the first light source enters the light-gathering component through the first light guide plate and is emitted out of the camera perpendicular to the light-emitting surface of the light-gathering component.

This backlight unit of disclosure can be at the first light guide plate of conversion between transparent state and atomizing state through setting up for first light guide plate can become transparent when shooing, lets external light not take place the light path and change ground and get into the camera and accomplish the formation of image. And a light condensing part is arranged above the first light guide plate, and light rays emitted by the first light guide plate are emitted out in a manner of being vertical to a light emitting surface of the light condensing part by using the light condensing part, so that side view angle light leakage can be reduced. By the arrangement, the situation that the display brightness of the display screen is not uniform can be avoided.

Fig. 1 is a schematic cross-sectional view illustrating a backlight module according to an exemplary embodiment. Fig. 2 is a schematic cross-sectional structure diagram of a display panel according to an exemplary embodiment.

As shown in fig. 1 and 2, the backlight module of the present disclosure is used for providing backlight for a display screen. The backlight module of the present disclosure includes; a first light guide plate 101, a first light source 300, and a light condensing part 200.

As shown in fig. 1 and 2, the camera 600 is disposed below the backlight module 100, which is also commonly referred to as an under-screen camera, and the first light guide plate 101 is disposed opposite to the camera 600. The first light guide plate 101 may include a first surface 111 and a second surface 112 opposite to each other, the first surface 111 is attached to the light focusing member 200, and the second surface 112 is opposite to the camera 600.

In the present disclosure, the first light guide plate 101 may assume two usage states, an atomized state and a transparent state, triggered by an electrical signal, and the first light guide plate 101 may be switched between the two states.

Specifically, when the first light guide plate 101 is in a transparent state, the external light may sequentially pass through the light collecting part 200 and the first light guide plate 101 and enter the lower side of the first light guide plate 101, for example, may enter the camera 600, so as to complete the imaging function of the camera 600. Moreover, when the external light passes through the light condensing element 200, the light path is not changed and the external light is vertically incident on the camera 600.

When the first light guide plate 101 is in the atomized state, the light emitted from the first light source 300 enters the light focusing member 200 through the first light guide plate 101, passes through the light focusing member 200, and then is emitted perpendicularly to the light emitting surface of the light focusing member 200.

In the present disclosure, when the first light guide plate 101 is in a transparent state, the light transmittance of the first light guide plate 101 may be greater than or equal to 90%. For example, when the first light guide plate 101 is in a transparent state, which is favorable for external light to pass through and ensures the imaging quality.

In the present disclosure, the first light guide plate is made of a general-purpose light guide plate, and may be made of a material such as an acrylic plate or a polycarbonate plate.

The commonly used light guide plate has the characteristics of extremely high refractive index and no light absorption, and is applied to the backlight module technology. The light guide plate can be printed with light guide points by using methods such as laser engraving, V-shaped cross grid engraving, UV screen printing technology and the like, and a line light source can be converted into a surface light source through high light conductivity of the light guide points.

The light guide points are used for interfering light path breakfast of light emitted by the light source, so that the light is scattered to achieve the effect of uniform light, and the first light guide plate has the effect of fog surface, and the fog surface effect can be considered as the fog state of the first light guide plate.

When the light rays irradiate each light guide point, the reflected light rays are diffused towards each angle, and then the reflection condition is destroyed to enable the light rays to be emitted from the front surface of the light guide plate. The light guide plate can uniformly emit light through various light guide points with different densities and sizes.

In the present disclosure, the first light source 300 is disposed at a side surface of the first light guide plate 101, and emits light to the first light guide plate 101. As shown in fig. 1, the first light source 300 is disposed at a side surface, and when the first light source 300 emits light, the light may be distributed on the first light guide plate 101.

For example, the light sources may be uniformly distributed on the first light guide plate 101, so as to provide uniform light to the display screen, which can make the display effect of the display screen better.

In the present disclosure, the first light source 300 may be a diode, for example, may be a light emitting diode. In some embodiments, the first light source 300 may be a sub-millimeter light emitting diode. The grain size of the sub-millimeter light emitting diode is 100-200 mu m, the number of backlight sources can be greatly increased, the regional brightness adjustment is realized, and better visual experience is brought.

In the present disclosure, when the first light guide plate 101 is in the fogging state, the first light guide plate 101 emits light emitted from the first light source 300 outward. That is, the first light guide plate 101 diffuses the light emitted from the first light source 300 like one side of the display screen.

The first light guide plate 101 may be changed in state at different current or voltage values after being energized. In the present disclosure, it may be arranged that the first light guide plate 101 is powered on and switched between a transparent state and a fogging state according to the turned-on voltage.

In the present disclosure, it may be set that the first light guide plate 101 is in a transparent state at the first voltage, at which time the first light source 300 is configured to stop emitting light. That is, the first light guide plate 101 is in a transparent state, the first light source 300 is turned off, and meanwhile, the light transmittance of the first light guide plate 101 is greater than or equal to 90%, so that external light can enter the camera 600 through the first light guide plate 101.

In the present disclosure, it may be set that the first light guide plate 101 is in the fog state at a second voltage different from the first voltage, and the first light guide plate 101 is converted into the fog state from the light transmitting state. Meanwhile, the first light source 300 is turned on, and the light emitted from the first light source 300 may be uniformly distributed on the first light guide plate 101.

It should be noted that the first voltage and the second voltage of the present disclosure can be specifically set according to specific needs, and the present disclosure is not particularly limited. For example, when the backlight assembly 100 is applied to a terminal, the first light guide plate 101 may be connected to a circuit board of the terminal on which a power management chip for the terminal is disposed, and specific values of the first voltage and the second voltage may be set through the power management chip, etc.

In the present disclosure, when the backlight module 100 is applied to a terminal, the backlight module 100 may be managed through a display function module of the terminal, so that the backlight module 100 cooperates with a display screen to jointly complete conversion between a display effect and a camera effect.

As shown in fig. 1 and 2, the backlight module of the present disclosure further includes a light condensing part 200. The light condensing member 200 is disposed above the first light guide plate 101, and is used for making the light emitted from the first light guide plate 101 exit perpendicularly to the light exit surface of the light condensing member.

As shown in fig. 1 and 2, the light collection component 200 includes an upper surface 201 and a lower surface 202 that are oppositely disposed. The upper surface 201 is opposite to the external light, and the lower surface 202 is attached to the second surface 112 of the first light guide plate 101.

In the present disclosure, the upper surface 201 of the light condensing member 200 is disposed opposite to the first light guide plate 101, light emitted from the first light guide plate 101 passes through the light condensing member 200 and then exits from the upper surface 201 of the light condensing member, and the upper surface 201 is a light exiting surface of the light condensing member 200.

As shown in fig. 1 and 2, the light emitted from the first light guide plate 101 enters the light focusing member 200, and the light entering the light focusing member 200 is divergent and emitted in all directions, as indicated by arrows in the light focusing member 200.

The light condensing part 200 has a light condensing effect, and after the light condensing effect of the light condensing part 200 is performed, the light emitted from the light condensing part 200 is more condensed than the light incident to the light condensing part 200. For example, as shown by an arrow above the light condensing member 200 in fig. 1, the light emitted from the light condensing member 200 is perpendicular to the light emitting surface of the light condensing member 200.

With such an arrangement, it is avoided that the scattered light rays directly emitted from the first light guide plate 101, i.e., the light rays emitted from the light condensing member 200, fall within the range of the light condensing member in the projection of the plane where the light condensing member is located. This avoids non-uniformity of light on the display screen.

In exemplary embodiments of the present disclosure, the light condensing part may be various parts having a light condensing function, and may include a liquid crystal lens, for example. Fig. 3 is a schematic cross-sectional structure diagram illustrating a liquid crystal lens according to an exemplary embodiment, and as shown in fig. 3, the liquid crystal lens includes an upper substrate 210 and a lower substrate 220 which are oppositely disposed, and a liquid crystal layer 203 disposed between the upper substrate 210 and the lower substrate 220.

In the present disclosure, the lower substrate 220 is disposed opposite to the first light guide plate 101, for example, the lower substrate 220 may be attached to the first surface 111 of the first light guide plate 101.

In the present disclosure, the liquid crystal lens is used as a part of the light focusing component, the refraction effect of the liquid crystal lens on light can be utilized, and the light focusing degree can be determined by self-adjustment of the electric field.

Electrodes may be disposed on both sides of the liquid crystal lens and connected to the circuit board through the electrodes. The turning direction of the liquid crystal molecules in the lens can be adjusted by changing the voltage of the electrodes on both sides of the liquid crystal lens. By designing the electrode patterns on the two sides of the liquid crystal, the refraction direction of light can be regulated and controlled, so that the functions of freely regulating and controlling light focusing and collimation are achieved.

By utilizing the characteristic of the liquid crystal lens, light rays in backlight can be converged during displaying, side viewing angle light leakage is reduced, and the effect of enabling external light rays to pass through linearly during photographing is achieved.

Specifically, the specific setting may be performed by using a control unit, a receiving unit, and other functional units of the terminal. For example, when the receiving unit receives the first signal, the control unit may send a corresponding instruction signal according to the first signal to instruct the liquid crystal lens to start the light converging mode, so that the light may be emitted perpendicularly to the light emitting surface of the light converging component.

When the receiving unit receives the second signal, the control unit can send out corresponding instruction signals according to the second signal to indicate the liquid crystal lens to be in a transparent state, namely, the light path of external light is not changed, and therefore imaging of the camera can not be influenced.

The scattering effect of the common light guide plate is too strong, so that the problems of large visual angle brightness unevenness and contrast reduction of the display screen can be caused. The focusing characteristics of the liquid crystal lens to light rays can be regulated and controlled, so that the problems of uneven light supplement at the position of the camera hole on the display panel and abnormal display effect can be effectively reduced.

And the thickness of the liquid crystal lens is thin, so that the whole stacking effect is not influenced, and the whole terminal is light and thin.

In exemplary embodiments of the present disclosure, the light condensing part may further include a polarizer. The polarizing plate has a function of shielding and transmitting incident light, and can transmit either longitudinal light or transverse light. The polarizing plate is generally a composite material in which a polarizing film, an inner protective film, a pressure-sensitive adhesive layer, and an outer protective film are laminated.

The polaroid is generally prepared by using a high molecular compound polyvinyl alcohol film as a substrate, dip-dyeing iodine with strong dichroism, reducing and stabilizing the iodine by using a boric acid aqueous solution, and performing unidirectional stretching for 4-5 times. After the polarizing plate is stretched, iodine molecules are adsorbed and aligned on the film in order, and the polarizing or polarization detecting properties are exhibited.

The light condensing component in the disclosure is provided with the polarizing film, so that light rays incident to the light condensing component can reach the converging effect after passing through the polarizing film and then being emitted from the light condensing component.

Fig. 4 is a schematic cross-sectional structure view illustrating a liquid crystal lens according to another exemplary embodiment, and as shown in fig. 4, in an exemplary embodiment of the present disclosure, the light condensing part 200 further includes a first polarizer 230 and a second polarizer 240. The first polarizer 230 is disposed on the upper surface of the upper substrate 210, and the second polarizer 240 is disposed on the lower surface of the lower substrate 220.

In the present disclosure, the degree to which the light condensing part 200 condenses the light may be controlled by adjusting the polarization directions of the first and second polarizing plates 230 and 240. The polarization directions of the first polarizer 230 and the second polarizer 240 are specifically set according to the display requirements of different display panels.

For example, the polarization direction of the first polarizer 230 and the polarization direction of the second polarizer 240 may be disposed to be perpendicular to each other. With this arrangement, the light emitted from the light collection member 200 can be made perpendicular to the light collection member 200. The display panel has the advantages that the uneven brightness on the display plane is avoided, and meanwhile, the influence on the picture quality of the display panel when the convergence degree of the emergent rays is too high can be avoided.

In an exemplary embodiment of the present disclosure, as shown in fig. 1 and 2, the backlight assembly 100 further includes a second light guide plate 102. The second light guide plate 102 may be a light guide plate having a light-equalizing function, and may be, for example, an acryl or polycarbonate plate. The light guide points can be printed on the second light guide plate 102 by using laser engraving, V-shaped cross grid engraving, UV screen printing technology and other methods, and the line light source can be converted into a surface light source through the high light conductivity of the light guide points. Light emitted by the light source can be uniformly distributed on the second light guide plate 102, and the light is diffused towards the display screen to serve as a backlight source to cooperate with the display screen to complete the display function.

The first light guide plate 101 and the second light guide plate 102 may be two independent members, or may be an integral member having different sections. For example, when the first light guide plate and the second light guide plate are integrated, only the first light guide plate may be configured to be switchable between a transparent state and a fogging state.

In the present disclosure, when the first light guide plate 101 is in the transparent state, the first light source 300 is turned off, and no picture is displayed on the area of the display screen corresponding to the first light guide plate 101. At this time, the display screen displays a picture corresponding to the area of the second light guide plate 102.

When first light guide plate 101 is in the atomizing state, first light source 300 closes, and the regional picture that all shows that corresponds first light guide plate 101 and second light guide plate 102 on the display screen to can utilize the setting of display screen interface, shelter from the demonstration that the limit between first light guide plate 101 and the second light guide plate 102 caused badly, promote display quality.

Fig. 5 is a schematic top view diagram of a backlight module according to an exemplary embodiment, and fig. 6 is a schematic top view diagram of a backlight module according to another exemplary embodiment. As shown in fig. 5 and 6, in the present disclosure, the second light guide plate 102 may be disposed around the first light guide plate 101.

As shown in fig. 5, the first light guide plate 101 may be rectangular and disposed opposite to the camera 600. The first light guide plate 101 is disposed in an inner region of the second light guide plate 102, and the second light guide plate 102 is disposed around the first light guide plate 101.

As shown in fig. 6, the first light guide plate 101 may be circular and disposed to face the camera 600. The first light guide plate 101 is disposed in an inner region of the second light guide plate 102, and the second light guide plate 102 is disposed around the first light guide plate 101.

It should be noted that, in the present disclosure, the second light guide plate is not limited to be disposed around the first light guide plate, and in other possible embodiments, other arrangements may also be provided.

Fig. 7 is a schematic top view illustrating a backlight module according to another exemplary embodiment, and as shown in fig. 7, a second light guide plate 102 is disposed at one side of a first light guide plate 101.

As shown in fig. 7, one side surface of the second light guide plate 102 may be adjacent to one side surface of the first light guide plate 101, and the first light guide plate 101 may have a rectangular shape or the second light guide plate 102 may have a rectangular shape.

With this arrangement, a boundary exists between the first light guide plate and the second light guide plate, and a region corresponding to the boundary may be displayed as a horizontal line on the display panel during display.

If the boundary of the display area is a transverse line, the improvement of the backlight uniformity can be realized by optimizing the optical structure and the light bar holes near the boundary, and the problem of the reduction of the display effect caused by the unmatched brightness between the two backlight modules is solved.

The interface design of the upper area can also be used by the system software layer, for example, different display contents can be respectively set for a first display area opposite to the first light guide plate and a second display area opposite to the second light guide plate, so as to weaken the difference between the different display areas. Lines can be displayed at the position corresponding to the boundary line so as to reduce the influence of uneven display on the use experience.

It should be noted that, in the present disclosure, the shapes of the first light guide plate and the second light guide plate, and the arrangement relationship therebetween may be specifically adjusted according to different terminal designs, and the present disclosure is not particularly limited.

As shown in fig. 5, 6, and 7, in an exemplary embodiment of the present disclosure, the first light guide plate 101 is disposed near one end of the display screen.

In the exemplary embodiment of the present disclosure, the first light guide plate 101 is disposed at one end of the display screen. Taking a mobile phone as an example, the first light guide plate 101 may be disposed at a head of the mobile phone. Such an arrangement not only facilitates the arrangement of the first light source 300, but also facilitates the connection of the first light guide plate 101 with other components.

As shown in fig. 2, the first light guide plate 101 may be connected to a circuit board 400, and the circuit board 400 may be a flexible circuit board. The first light guide plate 101 may be connected to an electrical component such as a power supply or a main board of a terminal through the circuit board 400.

Such an arrangement is advantageous for better utilization of the inner space of the mobile phone, and generally, a frame 500 for supporting the display screen is further provided around the display screen, and a receiving cavity is formed inside the frame 500. Placing the first light source 300 on the display near the head of the phone can make use of these spaces.

In an exemplary embodiment of the present disclosure, the backlight module further includes a second light source for emitting light to the second light guide plate. In the present disclosure, in exemplary embodiments of the present disclosure, the second light source may be a diode, for example, may be a light emitting diode. In some embodiments, the second light source may be a sub-millimeter light emitting diode. The grain size of the sub-millimeter light emitting diode is 100-200 mu m, the number of backlight sources can be greatly increased, the regional brightness adjustment is realized, and better visual experience is brought.

In the present disclosure, the first light source and the second light source may be two light sources independent of each other. Such an arrangement facilitates separate control of the activation of the first and second light sources.

For example, in the display state, the first light source and the second light source may be simultaneously maintained in the activated state, so that the entire display panel can display a picture.

When using the shooting function under the demonstration state, can close first light source, first light guide plate is transparent mode simultaneously, and external light can get into the camera and form an image. Therefore, the camera can be normally used for shooting when the second display area on the display panel normally works. Thus, various use requirements of users can be met.

In an exemplary embodiment of the present disclosure, the backlight assembly further includes: and the shading layer is arranged on the outer side of the second light guide plate. The light-shielding layer may be formed of ink, a light-shielding film, or a metal. The light propagation between the first light guide plate 101 and the second light guide plate 102 can be blocked.

For example, when the first light guide plate 101 is in a transparent state, the first light source 300 is turned off, and the first light guide plate 101 is in a light-transmitting state. At this time, the light shielding layer is disposed to prevent the light on the second light guide plate 102 from being transmitted to the first light guide plate 101, so as to ensure the imaging quality of the camera 600.

Moreover, when the first light guide plate 101 is in a transparent state, light is distributed on the first light guide plate 101, and the light shielding layer can be used for placing the light on the first light guide plate 101 and the light on the second light guide plate 102 to be superposed on the second surface 112, so that poor display is caused at the boundary between the first display area and the second display area due to too strong light.

Based on the same concept, the present disclosure also provides a display panel including: the display screen comprises the backlight module in any one of the embodiments; and the camera is arranged below the first light guide plate.

In the present disclosure, the Display may be a Liquid Crystal Display (LCD) that uses a Liquid Crystal solution in two pieces of polarized material, such that when current is passed through the Liquid, the Crystal is realigned to achieve the purpose of imaging.

The lcd panel is classified into a Static driving (Static), a Simple Matrix (Simple Matrix) and an Active Matrix (Active Matrix) according to the driving method. The passive matrix type can be a Twisted Nematic (TN) type, a Super Twisted Nematic (STN) type, and other passive matrix driven liquid crystal displays; the active matrix type can be roughly divided into two types, i.e., Thin Film Transistor (TFT) and two-terminal diode (MIM).

TN, STN and TFT type liquid crystal displays have differences in viewing angle, color, contrast and moving picture display quality due to the difference of liquid crystal molecular twist principle, so that they have obvious separation in the application range classification of products.

In terms of the range and layers in which the current liquid crystal display technology is applied, the active matrix driving technology is mainly Thin Film Transistor (TFT), and is widely applied to notebook computers and animation and image processing products.

The simple matrix driving technology is mainly used for Twisted Nematic (TN) and Super Twisted Nematic (STN), and most of the current applications are document processors and consumer products. Among these, the capital investment and the technical requirements for TFT liquid crystal displays are high, while the technical and capital requirements for TN and STN are relatively low.

A tft (thin Film transistor) LCD, i.e., a thin Film transistor LCD, is one of active matrix type liquid crystal displays (AM-LCDs). The TFT display uses a "back-lit" illumination mode, i.e., from bottom to top. This is done by providing a light source on the back of the liquid crystal, which is projected upward through the lower polarizer.

Because the electrodes of the upper and lower interlayers are changed into the FET electrode and the common electrode, when the FET electrode is conducted, the performance of liquid crystal molecules is also changed, the purpose of display can be achieved through shading and transmitting light, and the response time is greatly improved to about 80 ms. Because of its higher contrast and richer color than TN-LCD, and the screen update frequency is also faster, TFT is commonly called "true color".

Fig. 8 is a schematic diagram illustrating a structure of a display panel according to an exemplary embodiment, and as shown in fig. 8, a liquid crystal display panel includes: the liquid crystal display panel comprises a backlight 10, a first polarizing plate 20 arranged on the backlight 10, a first glass substrate 30 arranged on the first polarizing plate 20, a thin film transistor layer (TFT)40 arranged on the first glass substrate 30, a liquid crystal layer 50 arranged on the thin film transistor layer 40, a Color Filter (CF)60 arranged on the liquid crystal layer 50, a second glass substrate 70 arranged on the color filter 60, and a polarizing plate 80 arranged on the second glass substrate 70.

In an exemplary embodiment of the present disclosure, a display screen includes a first display area corresponding to a first light guide plate; wherein, in the transparent state, the first display area is in a non-display state; in the fogging state, the first display area is in a display state.

In an exemplary embodiment of the present disclosure, the display screen includes a first display area corresponding to the first light guide plate. Wherein, in the transparent state, the first display area is in a non-display state. In the fogging state, the first display area is in a display state.

In this disclosure, the display area corresponding to the first light guide plate is a first display area, and the display area corresponding to the second light guide plate is a second display area.

Based on the same concept, the present disclosure also provides a terminal including the display panel as in any one of the preceding embodiments.

Fig. 9 is a schematic structural diagram of a terminal according to an exemplary embodiment, and as shown in fig. 9, the backlight module of the present disclosure is configured with a first light guide plate 101 that can be switched between a transparent state and an atomized state, so that the first light guide plate can become transparent when shooting, and external light enters a camera 600 to complete imaging.

Furthermore, a light condensing member is further disposed above the first light guide plate 101, and light rays emitted from the first light guide plate 101 are condensed by the light condensing member, thereby reducing side view angle light leakage. By the arrangement, the situation that the display brightness of the display screen is not uniform can be avoided.

It is understood that "a plurality" in this disclosure means two or more, and other words are analogous. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. The singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It will be further understood that the terms "first," "second," and the like are used to describe various information and that such information should not be limited by these terms. These terms are only used to distinguish one type of information from another and do not denote a particular order or importance. Indeed, the terms "first," "second," and the like are fully interchangeable. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure.

It will be further understood that the terms "central," "longitudinal," "lateral," "front," "rear," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present embodiment and to simplify the description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation.

It will be further understood that, unless otherwise specified, "connected" includes direct connections between the two without the presence of other elements, as well as indirect connections between the two with the presence of other elements.

It is further to be understood that while operations are depicted in the drawings in a particular order, this is not to be understood as requiring that such operations be performed in the particular order shown or in serial order, or that all illustrated operations be performed, to achieve desirable results. In certain environments, multitasking and parallel processing may be advantageous.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the concepts disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (12)

1. A backlight module is used for providing backlight for a display screen, and comprises:

the first light guide plate can be in an atomized state or a transparent state under the triggering of an electric signal;

the first light source is arranged on the side surface of the first light guide plate and used for emitting light rays to the first light guide plate; and

the light condensing part is arranged above the first light guide plate and comprises a light emergent surface, the light emergent surface is the surface of the light condensing part, which is opposite to the first light guide plate, light emitted by the first light guide plate enters the light condensing part, and the light is emitted out perpendicularly to the light emergent surface after passing through the light condensing part;

when the first light guide plate is in a transparent state, external light rays sequentially pass through the light condensing part and the first light guide plate to enter the lower part of the first light guide plate, and the light path of the external light rays is not changed when the external light rays pass through the light condensing part; when the first light guide plate is in an atomized state, light emitted by the first light source enters the light focusing component through the first light guide plate and is emitted out of the light emergent surface of the light focusing component in a direction perpendicular to the light emergent surface.

2. The backlight module according to claim 1,

the light-focusing component comprises a liquid crystal lens, wherein the liquid crystal lens comprises an upper substrate and a lower substrate which are oppositely arranged, and a liquid crystal layer positioned between the upper substrate and the lower substrate;

the lower substrate is arranged opposite to the first light guide plate.

3. The backlight module according to claim 1,

the light focusing part further includes a polarizer.

4. The backlight module according to claim 2,

the light focusing part further comprises a first polarizing film and a second polarizing film;

the first polarizer is disposed on the upper surface of the upper substrate, and the second polarizer is disposed on the lower surface of the lower substrate.

5. The backlight module according to claim 4,

the polarization direction of the first polarizer and the polarization direction of the second polarizer are perpendicular to each other.

6. The backlight module according to any of claims 1-5,

the backlight module also comprises a second light guide plate;

the second light guide plate is arranged around the first light guide plate; or,

the second light guide plate is arranged on one side of the first light guide plate.

7. The backlight module according to claim 6,

the backlight module further comprises a second light source, and the second light source is used for emitting light to the second light guide plate.

8. The backlight module according to claim 6,

the backlight module further comprises: and the shading layer is arranged on the outer side of the second light guide plate.

9. A display panel, comprising:

a display screen, wherein the display screen comprises the backlight module according to any one of claims 1 to 8; and

and the camera is arranged below the first light guide plate.

10. The display panel according to claim 9,

the first light guide plate is arranged at one end close to the display screen.

11. The display panel according to claim 9,

the display screen comprises a first display area, and the first display area corresponds to the first light guide plate;

wherein, in the transparent state, the first display area is in a non-display state;

and in the atomization state, the first display area is in a display state.

12. A terminal characterized by comprising a display panel according to any one of claims 9 to 11.

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