CN113031345B

CN113031345B - Display device

Info

Publication number: CN113031345B
Application number: CN202110312670.7A
Authority: CN
Inventors: 朱九慧
Original assignee: Wuhan China Star Optoelectronics Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Technology Co Ltd
Priority date: 2021-03-24
Filing date: 2021-03-24
Publication date: 2022-07-12
Anticipated expiration: 2041-03-24
Also published as: CN113031345A

Abstract

The invention discloses a display device, which comprises a display panel, wherein a display area of the display panel comprises a main display area, a photosensitive area adjacent to the main display area, a backlight module arranged on one side of the display panel and a photosensitive element arranged on one side of the backlight module, which is far away from the display panel and is positioned in the photosensitive area; the backlight module comprises a first backlight unit for providing blue backlight for the photosensitive area; the display panel also comprises a first color resistance layer positioned in the photosensitive area, wherein the first color resistance layer comprises a first color resistance, a second color resistance and a third color resistance; the first color resistor and the second color resistor are respectively filled with materials containing red quantum dots and green quantum dots, and the third color resistor is filled with a transparent material. The invention can receive the light incident from the outside when the photosensitive area is used for shooting and can normally display the picture when the photosensitive area is not used for shooting by arranging the blue back light and the first color resistance layer, thereby solving the integration problem of the photosensitive element and the display device.

Description

Display device

Technical Field

The application relates to the technical field of display, in particular to a display device.

Background

In the display field, full-screen display technology has become mainstream, and this technology can improve the screen occupation ratio of a display device (e.g., a mobile phone). At present, in the full-screen display, the arrangement of a front camera is a difficult point which needs to be overcome.

The prior art scheme is usually to design leading camera in the display panel outside, and the reserve area that for example the top of display panel can predetermine shapes such as water droplet, bang sets up the camera, leads to the occupation of area ratio of water droplet or bang display panel's screen to be lower with the screen occupation of area complete placement camera in the display area.

Therefore, in order to increase the screen occupation ratio of the display device, it is urgently needed to solve the problem of integration of the camera and the display device.

Disclosure of Invention

The application provides a display device for the light that the external world incided can be received to the sensitization district when making a video recording, can normally show the picture when not making a video recording, has solved sensitization component and display device's integrated problem.

To solve the above technical problem, an embodiment of the present invention provides a display device, including:

the display panel comprises a display area, wherein the display area comprises a main display area and a photosensitive area adjacent to the main display area;

the backlight module is arranged on one side of the display panel; the backlight module comprises a first backlight unit for providing blue backlight for the photosensitive area at least;

the photosensitive element is arranged at a position, corresponding to the photosensitive area, on one side of the backlight module, far away from the display panel;

the display panel further comprises a first color resistance layer positioned in the photosensitive area, wherein the first color resistance layer comprises a first color resistance, a second color resistance and a third color resistance; the first color resistor and the second color resistor are respectively filled with materials containing red quantum dots and green quantum dots, and the third color resistor is filled with a transparent material.

According to the display device provided by the embodiment of the invention, the first backlight unit comprises a light source and a light guide layer, the light source is positioned on the side of the light guide layer, and the light guide layer can be switched between a transparent state and a scattering state.

According to the display device provided by the embodiment of the invention, the backlight module comprises a driving circuit, the driving circuit is electrically connected with the first backlight unit, and the driving circuit is used for driving the light source to emit light and the light guide layer to be switched between the transparent state and the scattering state.

According to the display device provided by the embodiment of the invention, the material of the light guide layer is polymer dispersed liquid crystal.

According to the display device provided by the embodiment of the invention, the transparent material filled with the third color resist is transparent optical glue.

According to the display device provided by the embodiment of the invention, the backlight module further comprises a second backlight unit for providing backlight for the main display area.

According to the display device provided by the embodiment of the invention, the display panel further comprises a second color resist layer positioned in the main display area, and the second color resist layer comprises a red color resist, a green color resist and a blue color resist.

According to the display device provided by the embodiment of the invention, the backlight provided by the second backlight unit is white light.

According to the display device provided by the embodiment of the invention, the second backlight unit comprises a light guide plate, and orthographic projections of the light guide plate and the light guide layer on the substrate of the display panel are not overlapped.

According to the display device provided by the embodiment of the invention, the photosensitive element is a camera.

The display device comprises a display panel, wherein a display area of the display panel comprises a main display area, a photosensitive area adjacent to the main display area, a backlight module arranged on one side of the display panel and a photosensitive element arranged on one side of the backlight module, which is far away from the display panel and is positioned in the photosensitive area; the backlight module comprises a first backlight unit arranged in the photosensitive area, and the first backlight unit comprises a first backlight source which is a side-entry type blue light source; the display panel also comprises a first color resistance layer positioned in the photosensitive area, wherein the first color resistance layer comprises a first color resistance, a second color resistance and a third color resistance; the first color resistor and the second color resistor are respectively filled with materials containing red quantum dots and green quantum dots, and the third color resistor is filled with a transparent material. The lateral-entering type blue light source, the quantum dot color resistor and the transparent color resistor are arranged, so that the photosensitive element is combined in the display area, the photosensitive area can receive light incident from the outside during shooting, the photosensitive area can normally display pictures when the shooting is not carried out, the integration problem of the photosensitive element and the display device is solved, and the screen occupation ratio of the display device is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the prior art of the present application, the drawings required for the embodiments are briefly described below. The drawings in the following description are only some embodiments of the present application, and it is obvious to those skilled in the art that other drawings can be obtained based on these drawings without inventive effort.

Fig. 1 is a schematic top view of a display device according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view along AA' of FIG. 1;

FIG. 3 is an enlarged schematic view of the sensing region of FIG. 2;

FIG. 4 is a schematic diagram illustrating the operation of a photosensitive area according to an embodiment of the present invention;

fig. 5 is a schematic diagram illustrating an operating principle of photographing in a photosensitive area according to an embodiment of the present invention;

fig. 6 is an enlarged structural diagram of the main display area in fig. 2.

Detailed Description

Specific structural and functional details disclosed herein are merely representative and are provided for purposes of describing example embodiments of the present application. This application may, however, be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.

In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified. Furthermore, the term "comprises" and any variations thereof is intended to cover non-exclusive inclusions.

Directional phrases used in this disclosure, such as [ upper ], [ lower ], [ inner ], [ outer ], [ side ], etc., refer only to the directions of the appended drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention. In the drawings, elements having similar structures are denoted by the same reference numerals.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically, electrically or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

For the convenience of understanding the technical solutions of the present invention, the technical solutions of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic top view of a display device according to an embodiment of the present invention; FIG. 2 is a schematic cross-sectional view along AA' of FIG. 1; fig. 3 is an enlarged structure diagram of a sensing region in fig. 2. With reference to fig. 1 to 3, a display device 1 according to an embodiment of the present invention includes: a display panel 2, a backlight module 3 and a photosensitive element 61. The display panel 2 may be, for example, a liquid crystal display panel, and the liquid crystal display panel may include an array substrate 21, a color filter substrate 23, and a liquid crystal layer 22 sandwiched between the array substrate 21 and the color filter substrate 23, and the structure of the liquid crystal display panel is not described herein again. The display panel 2 includes a display area including a main display area 5 and a photosensitive area 6 adjacent to the main display area 5. The main display area 5 at least partially surrounds the photosensitive area 6 (illustratively, the main display area 5 completely surrounds the photosensitive area 6 in fig. 1), and in other embodiments, the main display area 5 may also partially surround the photosensitive area 6.

As shown in fig. 2, the backlight module 3 is disposed on one side of the display panel 2, a photosensitive element 61 is disposed at a position corresponding to the photosensitive area 6 on one side of the backlight module 3 away from the display panel 2, and a photosensitive surface of the photosensitive element 61 faces the display panel. Further, the photosensitive element 61 may be fixed on the backlight module 3 by a fixing member 62, but the invention is not limited thereto, and the external ambient light may reach the photosensitive surface of the photosensitive element 61 through the photosensitive area 6, and implement functions such as image capturing.

As shown in fig. 3, the backlight module 3 includes a first backlight unit 31 for providing blue backlight to the photosensitive area 6 at least, so that the photosensitive area 6 can display images normally. The display panel 2 further includes a first color resist layer 24 located in the photosensitive region 6, where the first color resist layer 24 includes a first color resist 241, a second color resist 242, and a third color resist 243; the first color resistor 241 and the second color resistor 242 are filled with materials including red quantum dots and green quantum dots, respectively, and the third color resistor 243 is filled with a transparent material.

In the display device provided by the embodiment of the present invention, the color film substrate 23 is composed of red, green, and blue sub-pixel units, and the red, green, and blue sub-pixel units constitute one pixel unit. The first color resist layer 24 in the photosensitive region 6 is used for filtering light to make the sub-pixel unit have a corresponding light emitting color, and since the first backlight unit 31 provides blue backlight, for a red sub-pixel unit, blue light emitted by the blue backlight is irradiated on the first color resist 241, and red quantum dots in the first color resist 241 are photoluminescence quantum dot materials, and can convert the received blue light into red light to display red; for the green sub-pixel unit, blue light emitted by a blue backlight is irradiated on the second color resistor 242, green quantum dots in the second color resistor 242 are also photo-luminescent quantum dot materials, and the received blue light can be converted into green light to display green; for the blue sub-pixel unit, the blue light emitted by the blue backlight is irradiated on the third color filter 243, and the transparent material is filled in the third color filter 243, so that the blue light can be directly transmitted through the received blue light to display blue.

Optionally, the color filter substrate 23 includes a planarization layer 26, a black matrix 27 and a substrate 28 sequentially stacked along a light-emitting direction of the display panel, where the black matrix 27 is located on the substrate 28 and disposed between the red sub-pixel unit, the green sub-pixel unit and the blue sub-pixel unit, as shown in fig. 3, in the photosensitive region 6, the black matrix 27 is specifically disposed between the adjacent first color resistor 241, the second color resistor 242 and the third color resistor 243, and the planarization layer 26 is formed on the first color resistor layer 24 and the black matrix 27.

Further, in the liquid crystal display panel provided in the embodiment of the present invention, any of the sub-pixel units includes a pixel electrode and a common electrode, for example, the pixel electrode and the common electrode are respectively located on the array substrate 21 and the color filter substrate 23, when voltages are applied to the pixel electrode and the common electrode, an electric field is formed between the pixel electrode and the common electrode, and the electric field passes through the liquid crystal layer 22, so that liquid crystal in the liquid crystal layer 22 in the photosensitive region 6 is deflected under the voltage control of the pixel electrode and the common electrode, so that the sub-pixel unit has a corresponding light emitting brightness. When the photosensitive region 6 is used for displaying, the first backlight unit 31 provides blue light, liquid crystals in the liquid crystal layer 22 are deflected under the voltage control of the pixel electrode and the common electrode, and the first color resistor 241, the second color resistor 242, and the third color resistor 243 respectively display red, green, and blue colors; when the light sensing region 6 is used for capturing images, the first backlight unit 31 does not provide blue light, the first color resistor 241 and the second color resistor 242 are made opaque by controlling the voltages of the pixel electrode and the common electrode, and at this time, the third color resistor 243 filled with a transparent material can make light of the backlight module 3 near one side of the display panel 2 incident on the light sensing element 61, so as to implement a capturing function.

In the embodiment of the present invention, the display device includes a display panel 2 and a backlight module 3, and the backlight module 3 includes a first backlight unit 31 for providing a blue backlight for at least the photosensitive area 6. The display panel 2 comprises a display area, wherein the display area comprises a main display area 5 and a photosensitive area 6 adjacent to the main display area 5; the light sensing element 61 is disposed at a position corresponding to the light sensing area 6 on a side of the backlight module 3 away from the display panel 2, the display panel 2 further includes a first color resist layer 24 located in the light sensing area 6, and the first color resist layer 24 includes a first color resist 241, a second color resist 242, and a third color resist 243; first colour hinders 241 with second colour hinders 242 fills the material that includes red quantum dot and green quantum dot respectively, third colour hinders 243 filling transparent material, makes photosensitive area 6 both can be used for showing the image, can be used for seeing through external environment light again, so that is located photosensitive area 6 photosensitive element 61 forms images according to external environment light, has realized combining photosensitive element 61 in the display area, has expanded the application of the technique of making a video recording under the screen.

As shown in fig. 3, the display device provided in the embodiment of the present invention includes a first backlight unit 31, a light guide layer 311, and a sealant 313, wherein the sealant 313 surrounds the light guide layer 311, the light source 312 is located at a side of the light guide layer 311, and the light guide layer 311 can be switched between a transparent state and a scattering state; the light guide layer 311 is disposed in the light sensing region 6, and when the light sensing region 6 displays a picture, the light guide layer 311 is in a scattering state and is configured to transmit light, which is incident from the light source to the light guide layer 311, to the light exit side of the backlight module 3, where the light exit side of the backlight module 3 refers to a side of the backlight module 3 facing the display panel 2; when the photosensitive area 6 is used for shooting, the light guide layer 311 is converted into a transparent state, and the light on the light emitting side of the backlight module 3 is incident to the photosensitive element 61 through the light guide layer 311. According to the embodiment of the invention, the photosensitive element 61 can be hidden at the side of the backlight module 3, which is far away from the display panel, so that a full screen design is realized. Fig. 3 illustrates the structure of the first backlight unit 31, and does not limit the specific arrangement of the light source and the light guide layer 311.

Specifically, in the display device according to the embodiment of the present invention, the main display area 5 at least partially surrounds the photosensitive area 6, the main display area 5 is used for displaying a normal picture, and in the photosensitive area 6, the first color resist layer 24 includes a first color resist 241, a second color resist 242, and a third color resist 243; the first color resistor 241 and the second color resistor 242 are respectively filled with materials containing red quantum dots and green quantum dots, the third color resistor 243 is filled with a transparent material, when the photosensitive region 6 is used for displaying, the first backlight unit 31 provides blue light, the light guide layer 311 is in a scattering state so that light rays incident from the light source to the light guide layer 311 are transmitted to the light emitting side of the backlight module 3, liquid crystals in the liquid crystal layer 22 of the photosensitive region 6 are deflected under the voltage control of the pixel electrode and the common electrode, and the first color resistor 241, the second color resistor 242 and the third color resistor 243 respectively display red, green and blue; when the light sensing area 6 is used for shooting, the first backlight unit 31 does not provide blue light, the first color resistor 241 and the second color resistor 242 are made opaque by controlling the voltage of the pixel electrode and the common electrode, at this time, the third color resistor 243 filled with transparent materials is transparent, and the light guide layer 311 is converted into a transparent state so that the light on the light emitting side of the backlight module 3 is incident to the light sensing element 61 through the light guide layer 311, thereby realizing the shooting function.

In the display device provided in the embodiment of the present invention, the backlight module 3 includes a driving circuit, the driving circuit is electrically connected to the first backlight unit 31, and the driving circuit is configured to drive the light source to emit light and the light guiding layer 311 to switch between the transparent state and the scattering state. Specifically, when the photosensitive region 6 is used for displaying, the light source is made to emit light by the driving circuit, and the light guiding layer 311 is driven to convert into the scattering state, so that the light incident on the light guiding layer 311 is transmitted to the side of the backlight module 3 close to the display panel 2 to emit light; when the photosensitive area 6 is used for shooting, the light source is turned off by the driving circuit, a driving voltage is provided, the light guide layer 311 is driven by the driving circuit to be converted into the transparent state, and light of the backlight module 3 close to one side of the display panel 2 is incident to the photosensitive element 61 through the light guide layer 311.

Wherein the driving circuit may be formed on a flexible circuit board.

In the display device provided in the embodiment of the present invention, as shown in fig. 3, in the present exemplary embodiment, the first backlight unit 31 further includes a first transparent substrate 315, a second transparent substrate 316, a first transparent electrode layer 317, and a second transparent electrode layer 318, the second transparent substrate 316 is disposed opposite to the first transparent substrate 315, and the light guide layer 311 is formed between the first transparent substrate 315 and the second transparent substrate 316; the first transparent electrode layer 317 is located on one side of the first transparent substrate 315 facing the second transparent substrate 316; the second transparent electrode layer 318 is located on a side of the second transparent substrate 316 facing the first transparent substrate 315, and an electric field acting on the light guide layer 311 can be formed between the first transparent electrode and the second transparent electrode.

Optionally, the transparent electrode layer is ITO (indium tin oxide).

Optionally, the light guide layer 311 is made of Polymer Dispersed Liquid Crystal (PDLC), and the working principle thereof is that in the absence of an external voltage, the optical axes of Liquid Crystal particles in the PDLC are randomly oriented and present a disordered state, and the effective refractive index of the Liquid Crystal particles is not matched with the refractive index of the polymer, so that incident light is strongly scattered, and at this time, the PDLC is opaque or translucent. After an external voltage is applied, the optical axes of the liquid crystal particles in the PDLC are arranged vertical to the surface of the PDLC, namely, the optical axes are consistent with the direction of an electric field, the effective refractive index of the liquid crystal particles is basically matched with the refractive index of the polymer, no obvious interface exists, and a basically uniform medium is formed, so that incident light cannot be scattered, and the PDLC is transparent.

Specifically, in the present embodiment, when no electric field is formed between the first transparent electrode and the second transparent electrode, the optical axes of the liquid crystal particles in the PDLC are randomly oriented, and the PDLC is in a scattering state; when an electric field is formed between the first transparent electrode and the second transparent electrode, liquid crystals in the PDLC are oriented perpendicular to the liquid crystal display panel along with the direction of the electric field, the effective refractive index of liquid crystal particles is substantially matched with the refractive index of the polymer, and the PDLC is in a transparent state at this time, and the light guide layer 311 can be controlled to be switched between the transparent state and the scattering state by the electric field between the first transparent electrode and the second transparent electrode.

Further, the driving circuit is respectively connected to the first transparent electrode layer 317 and the second transparent electrode layer 318, so as to control the light guide layer 311 to switch between a transparent state and a scattering state. When the photosensitive region 6 is used for displaying, the driving circuit controls the voltage between the two transparent electrodes of the first backlight unit to be zero or a smaller voltage, the liquid crystal particles do not deflect, the light guide layer 311 is converted into a scattering state, and light incident laterally from the light guide layer 311 can be emitted from the light emitting side of the backlight module 3 under the scattering effect of the light guide layer 311; when the light sensing region 6 is used for shooting, the driving circuit applies a large voltage between the two transparent electrodes of the first backlight unit 31, at this time, the liquid crystal particles are deflected, the light guiding layer 311 is converted into a transparent state, the light guiding layer 311 does not deflect the light incident laterally and only serves as a transparent light guiding medium, so that the light of the backlight module 3 close to the display panel 2 can be incident into the light sensing element 61 through the light guiding layer 311. The backlight provided by the backlight module 3 may be provided by the first light source 312 located at one side of the light guide layer 311, and the light guide layer 311 and the transparent electrode may both transmit light, so that the light guide layer 311 may transmit the light of the backlight module 3 close to one side of the display panel 2 to the photosensitive element 61 through the light guide layer 311.

Fig. 4 is a schematic diagram of a working principle of displaying in the photosensitive region 6 according to an embodiment of the present invention, as shown in fig. 4, when the photosensitive region 6 is used for displaying, the first light source 312 emits light through the driving circuit, the driving circuit controls a voltage between two transparent electrodes of the first backlight unit to be zero or a smaller voltage, at this time, the light guiding layer 311 is in a scattering state, light incident on the light guiding layer 311 is transmitted to one side of the backlight module 3 close to the display panel 2 to emit light, liquid crystals in the liquid crystal layer 22 of the photosensitive region 6 are deflected under the voltage control of the pixel electrode and the common electrode, the first color resistor 241, the second color resistor 242, and the third color resistor 243 display red, green, and blue, and the light of the three colors are mixed to form a display image.

Fig. 5 is a schematic diagram of a working principle of the light sensing region 6 for performing image pickup according to the embodiment of the present invention, as shown in fig. 5, when the light sensing region 6 is used for image pickup, the first light source 312 is turned off by the driving circuit, the first color resistor 241 and the second color resistor 242 are made opaque by controlling voltages of the pixel electrode and the common electrode, at this time, the third color resistor 243 filled with a transparent material is transparent, and a driving voltage is provided to form an electric field between the first transparent electrode and the second transparent electrode of the first backlight unit 31, at this time, the light guiding layer 311 is in a transparent state, a light beam incident in an external environment passes through the third color resistor 243 and the light guiding layer 311, so that light on a side of the backlight module 3 close to the display panel 2 enters the light sensing element 61 through the light guiding layer 311, and an image pickup function is achieved.

In the embodiment of the present invention, when the photosensitive region 6 is used for displaying, no voltage may be applied to at least one of the first transparent electrode and the second transparent electrode, that is, there is no electric field between the first transparent electrode and the second transparent electrode, at this time, the liquid crystal particles do not deflect, and the light is scattered after passing through the light guiding layer 311, that is, the light is in a fog state, where the fog state means that a part of the light may pass through the light guiding layer 311, but may be emitted from different angles due to scattering, so as to generate a fog display effect of ground glass, that is, the light guiding layer 311 in the photosensitive region 6 may achieve a shielding effect on the photosensitive element 61, so as to avoid invading user privacy due to shooting of the photosensitive element 61. It can be understood that the above-mentioned control manner of applying a voltage to the first transparent electrode and the second transparent electrode to make the light guiding layer 311 in the transparent state and making no electric field between the first transparent electrode and the second transparent electrode to control the light guiding layer 311 in the scattering state is only an example, and other control manners may also be used, for example, the first transparent electrode and the second transparent electrode make the light guiding layer 311 in the transparent state under the action of one voltage difference, and the first transparent electrode and the second transparent electrode make the light guiding layer 311 in the scattering state under the action of another voltage difference, as long as the electric field between the first transparent electrode and the second transparent electrode controls the light guiding layer 311 to switch between the transparent state and the scattering state.

Optionally, the third color resistor 243 is filled with a transparent material, such that the third color resistor 243 transmits light, specifically, when the light sensing region 6 is used for displaying, the first backlight unit 31 provides blue light, the light guiding layer 311 is in a scattering state, so that light incident from the light source to the light guiding layer 311 is transmitted to the light emitting side of the backlight module 3, liquid crystals in the liquid crystal layer 22 of the light sensing region 6 are deflected under the voltage control of the pixel electrode and the common electrode, and the third color resistor 243 can directly transmit the received blue light to display blue; when the photosensitive area 6 is used for shooting, the first backlight unit 31 does not provide blue light, the first color resistor 241 and the second color resistor 242 are opaque by controlling the voltage of the pixel electrode and the common electrode, at this time, the transparent material is filled in the third color resistor 243, the light guide layer 311 is in a transparent state, so that the light emitted from the light emitting side of the backlight module 3 is emitted to the photosensitive element 61 through the light guide layer 311, and the shooting function is realized.

In the display device provided in the embodiment of the present invention, the display panel 2 includes a display area, the display area includes a main display area 5 and a photosensitive area 6 adjacent to the main display area 5, the backlight module 3 is disposed on one side of the display panel 2, as shown in fig. 2, and the backlight module 3 further includes a second backlight unit 32 for providing backlight for the main display area 5. Fig. 6 is an enlarged schematic structural view of the main display area 5 in fig. 2, and as shown in fig. 6, the second backlight unit 32 includes a second light source 322 (in fig. 6, the second light source 322 is exemplarily a side-in light source), and in other embodiments, the second light source 322 may also be a direct light source.

Optionally, referring to fig. 3 and 6, the display device provided by the embodiment of the present invention further includes a first flexible circuit board 314 and a second flexible circuit board 324. The first flexible circuit board 314 is electrically connected to the first light source 312 of the first backlight unit 31, and the second flexible circuit board 324 is electrically connected to the second light source 322 of the second backlight unit 32. The first light source 312 and the second light source 322 are separately controlled by the first flexible circuit board 314 and the second flexible circuit board 324, so that when the first light source 312 is turned off, the light sensing area 6 is used for capturing images, and the second light source 322 can still be turned on to provide backlight to make the main display area 5 display images.

Further, as shown in fig. 6, the display panel 2 includes a first color resist layer 24 located in the photosensitive region 6 and a second color resist layer 25 located in the main display region 5, and the second color resist layer 25 includes a red resist 251, a green resist 252 and a blue resist 253, which respectively display red, green and blue, and the three colors of light are mixed to make the main display region 5 display a picture.

Optionally, the second light source 322 is a white light source, and specifically, the white light provided by the white light source irradiates the second color resist layer 25, and provides a filtering effect of the color resist layer to make the red light resist 251, the green light resist 252, and the blue light resist 253 emit red light, green light, and blue light, respectively.

In the display device of the embodiment of the invention, the second backlight unit 32 includes a light guide plate 321. Further, the second backlight unit 32 further includes a prism sheet, a diffusion sheet, a reflection sheet, and a sealant 313, and the prism sheet 325, the diffusion sheet 326, the light guide plate 321, and the reflection sheet 327 are sequentially stacked along a direction away from the display panel 2, and the sealant 313 is disposed around the light guide plate 321. Among them, the prism sheet 325 is used to improve the light emitting efficiency of the entire backlight system; the diffuser 326 may be used to improve the optical quality and also to improve the absorption between the film and other parts of the display panel; the light guide plate 321 is used for guiding out light emitted from the white light source of the second backlight unit 32 and then providing uniform backlight to the main display area 5; the reflector 327 is used to control the reflection and refraction of light, so that the path of light is controllable, the brightness of the display panel is more uniform, and the display panel can achieve better display effect with lower power consumption by the arrangement of the above films.

Specifically, in this embodiment, the light guide plate 321 is located in the main display area 5, the light guide layer 311 is located in the light sensing area 6, and orthogonal projections of the light guide plate 321 and the light guide layer 311 on the substrate of the display panel 2 do not overlap with each other, so as to prevent the backlight provided by the first backlight unit 31 to the light sensing area 6 and the backlight provided by the second backlight unit 32 to the main display area 5 from interfering with each other.

Alternatively, the light source of the second backlight unit 32 may be a side-in type light source and a direct type light source, and correspondingly, the light guide plate 321 may also be a side-in type light guide plate 321 and a direct type light guide plate 321.

In the display device provided by the embodiment of the invention, the photosensitive element 61 can be a camera, the photosensitive surface of the camera faces the display panel and serves as a front camera to realize a camera shooting function, and the camera is hidden below the backlight module 3, so that the camera can receive light incident from the outside during camera shooting, and the photosensitive area 6 can normally display pictures when the camera does not shoot, thereby realizing a comprehensive screen design.

In this embodiment, the photosensitive area 6 may be provided with a front-facing camera, and when the front-facing camera is used, the front-facing camera controls the specific liquid crystal to be in a transparent state, so that the front-facing camera cannot be adversely affected; when the front camera is not used, the light guide layer 311 is controlled to be in a scattering state so that the light sensing area 6 displays a picture, and therefore the fact that the privacy of a user is invaded due to shooting of the front camera is avoided. On one hand, the display panel is prevented from being cut in a special shape at the position of the front camera, so that the probability of damage risk to the display panel caused by cutting is reduced, and meanwhile, the photosensitive area 6 can display pictures, so that the display device provided with the front camera has a larger screen occupation ratio; on the other hand, through in the photosensitive region 6 the characteristics that leaded light layer 311 can change between transparent state and scattering state can prevent revealing of user's privacy, have improved the security performance.

An embodiment of the present invention provides a driving method of a display device, for driving the display device as described above, wherein the first backlight unit 31 has a display mode and an image capturing mode, and in the display mode, the first backlight unit 31 and the second backlight unit 32 provide uniform backlight to a display panel; in the shooting mode, light passes through the first backlight unit 31 to reach the camera, and a shooting function is realized.

The driving method of the display device includes the steps of: in the display mode, the first light source 312 and the second light source 322 are controlled to be turned on by the first flexible circuit board 314 and the second flexible circuit board 324; the light guide layer 311 is driven by the driving circuit to be converted into the scattering state, so that light rays incident to the light guide layer 311 are transmitted to one side of the backlight module 3 close to the display panel 2 to emit light;

in the image pickup mode, the first flexible circuit board 314 and the second flexible circuit board 324 control the first light source 312 to be turned off and the second light source 322 to be turned on; and controls the first color resistor 241 and the second color resistor 242 to be closed; and providing a driving voltage, driving the light guide layer 311 to be converted into the transparent state through the driving circuit, so that the light of the backlight module 3 close to one side of the display panel 2 enters the photosensitive element 61 through the light guide layer 311.

In summary, the present application provides a display device, which includes a display panel, a display area of the display panel including a main display area, a photosensitive area adjacent to the main display area, a backlight module disposed on one side of the display panel, and a photosensitive element disposed on one side of the backlight module away from the display panel and located in the photosensitive area; the backlight module comprises a first backlight unit arranged in the photosensitive area, and the first backlight unit comprises a first backlight source which is a side-entry type blue light source; the display panel further comprises an array substrate and a color film substrate, wherein the color film substrate comprises a first color resistance layer positioned in the light sensing area, and the first color resistance layer comprises a first color resistance, a second color resistance and a third color resistance; the first color resistor and the second color resistor are respectively filled with materials containing red quantum dots and green quantum dots, and the third color resistor is filled with a transparent material. According to the invention, by arranging the lateral-entering type blue light source, the quantum dot color resistor and the transparent color resistor, the photosensitive element is combined in the display area, so that the photosensitive area can receive light incident from the outside during shooting, the photosensitive area can normally display pictures and can prevent the privacy of a user from being leaked when the camera is not shot, the integration problem of the photosensitive element and the display device is solved, and the screen occupation ratio of the display device is improved.

In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.

Claims

1. A display device, comprising:

the display panel further comprises a first color resistance layer positioned in the photosensitive area, wherein the first color resistance layer comprises a first color resistance, a second color resistance and a third color resistance; the first color resistor and the second color resistor are respectively filled with materials containing red quantum dots and green quantum dots, and the third color resistor is filled with a transparent material;

the first backlight unit comprises a light source and a light guide layer, the light source is located on the side of the light guide layer, and the light guide layer can be switched between a transparent state and a scattering state.

2. The display device according to claim 1, wherein the backlight module comprises a driving circuit electrically connected to the first backlight unit, the driving circuit configured to drive the light source to emit light and the light guiding layer to switch between the transparent state and the scattering state.

3. The display device according to claim 2, wherein the material of the light guiding layer is polymer dispersed liquid crystal.

4. The display apparatus of claim 1, wherein the third color-resist filled transparent material is a transparent optical glue.

5. The display device according to claim 2 or 3, wherein the backlight module further comprises a second backlight unit for providing backlight to the main display area.

6. The display device according to claim 5, wherein the display panel further comprises a second color resist layer in the main display area, the second color resist layer comprising a red resist, a green resist, and a blue resist.

7. The display device of claim 6, wherein the backlight provided by the second backlight unit is white light.

8. The display device as claimed in claim 6, wherein the second backlight unit includes a light guide plate, and orthographic projections of the light guide plate and the light guide layer on the substrate of the display panel do not overlap each other.

9. The display device of claim 1, wherein the light sensing element is a camera.