CN110737133A - Display device - Google Patents

Display device Download PDF

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Publication number
CN110737133A
CN110737133A CN201911016618.6A CN201911016618A CN110737133A CN 110737133 A CN110737133 A CN 110737133A CN 201911016618 A CN201911016618 A CN 201911016618A CN 110737133 A CN110737133 A CN 110737133A
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China
Prior art keywords
quantum dot
dot film
display
light
region
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CN201911016618.6A
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Chinese (zh)
Inventor
刘丽萍
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Xiamen Tianma Microelectronics Co Ltd
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Xiamen Tianma Microelectronics Co Ltd
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Priority to CN201911016618.6A priority Critical patent/CN110737133A/en
Publication of CN110737133A publication Critical patent/CN110737133A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/10—Image acquisition
    • G06V10/12—Details of acquisition arrangements; Constructional details thereof
    • G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
    • G06V10/145—Illumination specially adapted for pattern recognition, e.g. using gratings
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Multimedia (AREA)
  • Nonlinear Science (AREA)
  • Optics & Photonics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • Human Computer Interaction (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Liquid Crystal (AREA)

Abstract

The invention discloses display devices, which comprise a backlight module and a display panel positioned on the light-emitting side of the backlight module, wherein the display area of the display panel comprises a th display area and a fingerprint identification area, the backlight module comprises a quantum dot film, the quantum dot film comprises a th quantum dot film area corresponding to the fingerprint identification area and a second quantum dot film area corresponding to the th display area, the th quantum dot film area is provided with a th quantum dot, a second quantum dot and a third quantum dot, the th quantum dot emits color light after being excited by a backlight source, the second quantum dot emits the second color light after being excited by the backlight source, and the third quantum dot emits infrared light after being excited by the backlight source.

Description

Display device
Technical Field
The invention relates to the technical field of display, in particular to display devices.
Background
The present invention relates to a Low Temperature polysilicon Liquid Crystal Display (LTPS LCD) device, which has advantages of light weight, thin thickness, Low power consumption, and small radiation, and has been generally used in the fields of information technology, multimedia technology, etc. a Liquid Crystal Display generally includes a backlight module array substrate, a Liquid Crystal layer, a color film substrate, etc. besides the advantages of light weight and thin thickness, the Display effect of a user on the Display device is also higher and higher, in order to improve the screen occupation ratio and achieve a better Display effect, a fingerprint identification area also falls into the Display area of the Display screen, while the existing fingerprint identification technology is fingerprint identification under a plug-in screen, a light source mainly uses an independent infrared LED as a transmitter, an infrared receiver as separate infrared detectors , a touch panel is located above the Display area, and is not beneficial to the process of infrared ray detection systems, and infrared ray detectors are installed under a finger-mounted screen.
Disclosure of Invention
In view of this, the present invention provides kinds of display devices, including:
the display panel comprises a backlight module and a display panel positioned on the light-emitting side of the backlight module;
the display panel comprises a display area and a non-display area surrounding the display area, wherein the display area comprises an th display area and a fingerprint identification area;
the backlight module comprises a backlight source and a quantum dot film, and a light-emitting surface of the backlight source is parallel to or intersected with a light-emitting surface of the quantum dot film;
the quantum dot film comprises an quantum dot film region corresponding to the fingerprint identification region and a second quantum dot film region corresponding to the display region, wherein the quantum dot film region is provided with quantum dots, second quantum dots and third quantum dots, and the quantum dots and the second quantum dots are arranged on the second quantum dot film region;
the th quantum dot emits color light after being excited by the backlight source, the second quantum dot emits second color light after being excited by the backlight source, and the third quantum dot emits infrared light after being excited by the backlight source.
Compared with the prior art, the display device provided by the invention at least realizes the following beneficial effects:
the backlight module is internally provided with a quantum dot film, a third quantum dot on an quantum dot film region corresponding to the fingerprint identification region on the quantum dot film can emit infrared light after being excited by a backlight source, namely, the infrared light required by infrared fingerprint identification can be emitted under the combined action of the quantum dot film and the backlight source, an infrared light source is not required to be independently arranged, so that the power consumption of the display device is reduced, the quantum dot film is arranged in the backlight module and corresponds to the display region, a space is not required to be independently arranged for the quantum dot film, the narrow frame of the display device is favorably realized, the screen occupation ratio is improved, the structure is more exquisite, a quantum dot film region corresponding to the fingerprint identification region can emit the infrared light required by the fingerprint identification and can also emit color light and second color light required by the display under the excitation of the backlight source, the display brightness and the display effect of the display panel are not influenced even if the fingerprint identification region is positioned in the display region AA, and the normal optical quality is ensured.
Of course, it is not specifically necessary for any product embodying the invention to achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification , illustrate embodiments of the invention and together with the description , serve to explain the principles of the invention.
Fig. 1 is a schematic structural diagram of display devices provided in the prior art;
FIG. 2 is a schematic plan view of a display panel of display devices according to the present invention;
fig. 3 is a schematic plan view of a quantum dot film of display devices provided by the present invention;
FIG. 4 is another schematic plan views of a display panel of display devices according to the present invention;
fig. 5 is another schematic plan views of quantum dot films of display devices provided by the present invention;
fig. 6 is another schematic plan views of the display panel of display devices according to the present invention;
fig. 7 is another schematic plan views of quantum dot films of display devices provided by the present invention;
fig. 8 is another schematic plan views of quantum dot films of display devices provided by the present invention;
fig. 9 is another schematic plan views of quantum dot films of display devices provided by the present invention;
fig. 10 is another schematic plan views of quantum dot films of display devices provided by the present invention;
fig. 11 is another schematic plan views of quantum dot films of display devices provided by the present invention;
FIG. 12 is a schematic structural diagram of display devices provided by the present invention;
fig. 13 is a schematic view of another structures of display devices provided by the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least exemplary embodiments is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once a item is defined in figures, it need not be discussed further in in subsequent figures.
Referring to fig. 1, fig. 1 is a schematic structural diagram of display devices provided in the prior art, a fingerprint identification display device includes a touch screen 30, a liquid crystal layer 31, a backlight module 32, an infrared LED33, and a fingerprint sensor 34, where an infrared LED33 is located at an edge of the touch screen 30, emits infrared rays upward to a surface of a finger, reflects the infrared rays through a fingerprint of the finger, and then passes through the backlight module 32 to the fingerprint identifier 34, i.e., the fingerprint identification display device under a plug-in screen, in the prior art, both the infrared LED33 and the fingerprint identifier 34 need to occupy too much space below a mobile phone screen, which is not beneficial to reducing the thickness of the display device, is not beneficial to realizing a narrow frame of the display device, and reduces the screen occupation ratio, the separately arranged infrared LED33 increases the power consumption of a system, and the need of a separate process to arrange the fingerprint sensor.
Referring to fig. 2 and 3, fig. 2 is a schematic plan view of a display panel of display devices provided by the present invention, fig. 3 is a schematic plan view of a quantum dot film of display devices provided by the present invention, the display device includes a backlight module 200 and a display panel 100 located on the light-emitting side of the backlight module 200;
in fig. 2, the display panel 100 includes a display area AA and a non-display area NA surrounding the display area AA, the display area AA includes a th display area 01 and a fingerprint identification area 02, the backlight module 200 in fig. 3 includes a backlight 11 (not shown) and a quantum dot film 03, a light-emitting surface of the backlight 11 is parallel to or intersects with a light-emitting surface of the quantum dot film 03, that is, the display device is suitable for both a direct-type backlight 11 and an edge-type backlight 11, the quantum dot film 03 includes a quantum dot film 04 corresponding to the fingerprint identification area 02 and a second quantum dot film 05 corresponding to the th display area 01, the th quantum dot film 04 is provided with a th quantum dot 06, a second quantum dot 07 and a third quantum dot 08, the second quantum dot film 05 is provided with a th quantum dot 06 and a second quantum dot 07, the th quantum dot 06 emits a th color light after being excited by the backlight 11, the second quantum dot 07 emits a second color light after being excited by the backlight 11, and the third quantum dot 08 emits an infrared light after being excited by the backlight 11.
In this embodiment, the third quantum dot 08 on the quantum dot film 04 corresponding to the fingerprint identification area 02 can emit infrared light after being excited by the backlight 11, that is, only the quantum dot film 04 and the backlight 11 need to jointly act, the infrared light required for infrared fingerprint identification can be emitted, an infrared light source does not need to be separately arranged, and power consumption of the display device is reduced, the quantum dot film 03 is arranged in the backlight module 200 and corresponds to the display area AA, a space does not need to be separately arranged for the quantum dot film 03, the structure is more exquisite, a narrow frame of the display device is facilitated, the fingerprint identification area 02 is brought into the range of the display area AA, and the screen occupation ratio is greatly improved, the quantum dot film 04 corresponding to the fingerprint identification area 02 can emit infrared light required for fingerprint identification under excitation of the backlight 11, can also emit color light and second color light required for display, the color light and the light emitted by the backlight 11 are mixed to emit white light, that the quantum dot film 04 can emit white light while the fingerprint identification area and the display area AA can be well illuminated, and the display effect of the fingerprint identification can be better maintained, and the display panel can be normally maintained, and the display quality of the display area AA can be improved.
As can be seen from fig. 2 and fig. 3, in this embodiment, the -th display region 01 is disposed around the fingerprint identification region 02, the second quantum dot film region 05 is disposed around the -th quantum dot film region 04, and the fingerprint identification region 02 and the -th quantum dot film region 04 are circular in shape.
It is understood that the sizes and positions of the fingerprint identification region 02 and the th quantum dot film region 04 are only schematic, and do not represent actual sizes and positions, and detailed description is omitted below.
It is understood that the patterns filled in the regions in fig. 2 are only used to distinguish the functional regions divided on the display panel 100, and are not described in detail below, and for convenience of explanation, in fig. 3, for distinguishing the quantum dot film regions, the -th quantum dot film region 04 is marked with a dotted line, and is not described in detail below.
It is to be understood that the arrangement of the quantum dots in fig. 3 is only provided for convenience of understanding, and does not represent the arrangement of the quantum dots in the quantum dot film 03 in an actual situation, and the description thereof is omitted.
It is understood that fig. 2 and 3 only show the case that the second quantum dot film region 05 only includes th quantum dots 06 and 07 th quantum dots, and of course, the second quantum dot film region 05 can also include the third quantum dots 08, i.e. the whole display panel 100 can be used for both fingerprint recognition and image display.
In some alternative embodiments, as shown in fig. 4 and fig. 5, fig. 4 is another 0 plane schematic diagram of the display panel of display devices provided by the present invention, fig. 5 is another 2 plane schematic diagrams of the quantum dot film of 1 display devices provided by the present invention, it can be seen from the figure that the display region 01 is not disposed around the fingerprint identification region 02, the side of the fingerprint identification region 02 coincides with the side of the display region 01, the side of the quantum dot film region 04 coincides with the side of the second quantum dot film region 05, and the shapes of the fingerprint identification region 02 and the quantum dot film region 04 are rectangular.
Optionally, referring to fig. 6 and 7, fig. 6 is another plane schematic diagrams of display panels of display devices provided by the present invention, fig. 7 is another plane schematic diagrams of quantum dot films of display devices provided by the present invention, the display area AA further includes a transition display area 10, the transition display area 10 is located between the th display area 01 and the fingerprint identification area 02, the quantum dot film 03 further includes a third quantum dot film area 09 corresponding to the transition display area 10, the third quantum dot film area 09 is provided with a th quantum dot 06 and a second quantum dot 07, and the third quantum dot film area 09 is further provided with a third quantum dot 08.
It is understood that the display panel 100 is generally provided with various circuit devices required for fingerprint identification on the fingerprint identification area 02, so that the aperture ratio of the fingerprint identification area 02 portion is smaller than that of the th display area 01 portion, which results in that the brightness of the fingerprint identification area 02 portion on the display panel 100 is significantly lower than that of the th display area 01 portion, and the bright and dark boundaries of the th display area 01 and the fingerprint identification area 02 are visually too significant, thereby affecting the display effect of the display panel 100. therefore, in the present embodiment, the transition display area 10 is provided on the display panel 100, and the third quantum dot film 09 is provided on the quantum dot film 03 corresponding to the transition display area 10, and the third quantum dot 08 is provided on the third quantum dot film 09, so that the aperture ratio of the transition display area 10 is between the fingerprint identification area 02 and the th display area 01, the brightness of the transition display area 10 portion on the display panel 100 is also between the fingerprint identification area 02 and the th display area 01, i.e. it can be understood that the setting of the transition display area 10 is better to make the fingerprint identification area 02 closer to the fingerprint identification area 02, and the brightness of the fingerprint identification area 3875 is better to make the display area 02 more significantly less noticeable, and the display area 3 is better display area more clearly without the natural display effect of the fingerprint identification area.
In alternative embodiments, as shown in fig. 8, fig. 8 is another schematic plan view of the quantum dot film of display devices provided by the present invention, wherein the density of th quantum dots 06 in the th quantum dot film region 04 is greater than the density of th quantum dots 06 in the third quantum dot film region 09, and the density of second quantum dots 07 in the th quantum dot film region 04 is greater than the density of second quantum dots 07 in the third quantum dot film region 09.
It can be understood that, various circuit devices required for fingerprint identification are generally arranged on the fingerprint identification area 02, so that the aperture ratio of the fingerprint identification area 02 part is smaller than that of the transition display area 10 part, which results in that the brightness of the fingerprint identification area 02 part on the display panel 100 is obviously lower than that of the transition display area 10 part, and the display effect of the display panel 100 is affected, therefore, in order to make the display brightness of the fingerprint identification area 02 and the transition display area 10 the same, methods are to make the number of the backlight sources 11 corresponding to the fingerprint identification area 02 larger than that of the backlight sources 11 corresponding to the transition display area 10, and the display brightness of each part is improved by adjusting the number of the backlight sources 11, but this method increases the manufacturing cost of the display device, and methods are in this embodiment, when the quantum dot film 03 is manufactured, the density of the th quantum dots 06 and the second quantum dots 07 on the quantum dot film 04 of the is larger than that of the quantum dots 06 and the second quantum dots 07 on the quantum dot film 09, and the density of the quantum dots and the quantum dot film 06 and the second quantum dot film 06 and the density of each area 06 and the quantum dots 06 and the quantum dot film 09 are changed, so that the display panel 100 is skillfully, and the manufacturing cost of the display panel 100 is lower than that the manufacturing process of.
It is understood that the third quantum dots 08 are not shown in fig. 8 in order to better show the variation of the density of the quantum dots 06 and the second quantum dots 07 in the th quantum dot film region 04 and the third quantum dot film region 10.
Alternatively, with continued reference to fig. 8, the density of the th quantum dots 06 is gradually increased and the density of the second quantum dots 07 is gradually increased along the direction that the th display area 01 points to the fingerprint identification area 02.
It can be understood that, in order to make the brightness variation of each region of the display panel 100 more uniform, and more natural, the present embodiment makes the th quantum dots 06 and the second quantum dots 07 have gradually higher density, and the display effect of the display panel 100 is better.
Alternatively, referring to fig. 9, fig. 9 is a schematic plan view of another quantum dot films of display devices provided by the present invention, wherein the density of the third quantum dots 08 gradually increases along the direction from the transitional display region 10 to the fingerprint identification region 02.
It can be understood that, the number of the third quantum dots 08 in the third quantum dot film 09 to the quantum dot film 04 is gradually increased, under the excitation of the backlight 11, more infrared light can be emitted in the fingerprint identification area 02 than in the transition display area 10, the infrared light contacting with the finger is increased, the fingerprint identification effect is better, the fingerprint identification sensitivity is higher, and the brightness of each area of the display panel 100 can be changed more uniformly and more naturally due to the gradual increase of the density of the third quantum dots 08.
In alternative embodiments, as shown in fig. 10, fig. 10 is another schematic plan views of quantum dot films of display devices provided by the present invention, wherein the density of quantum dots 06 is gradually increased and the density of second quantum dots 07 is gradually increased along the direction that display region 01 points to fingerprint identification region 02, and the density of third quantum dots 08 is gradually increased along the direction that transition display region 10 points to fingerprint identification region 02.
It can be understood that, in order to make the luminance variation from the th display area 01 to the fingerprint identification area 02 on the display panel 100 more uniform, more natural, and make the fingerprint identification effect better, the present embodiment makes the density of each quantum dot gradually increase along the direction from the th display area 01 to the fingerprint identification area 02.
Optionally, referring to fig. 11, fig. 11 is a schematic view of kinds of plane views of quantum dot films of kinds of display devices provided by the present invention, where a backlight 11 (not shown in the figure) is a blue LED, a th color light is a red light, a second color light is a green light, a radius of a th quantum dot is 8-9nm, a radius of a second quantum dot is 5-6nm, and a radius of a third quantum dot is greater than 10 nm.
The type and the color of light emitted by each quantum dot after being excited by a blue light LED can be changed by changing the size of the quantum dot, when the radius of the quantum dot is larger than 10nm, the quantum dot emits infrared light after being excited by the blue light LED, the light emitted by the quantum dot can be used for fingerprint identification, when the radius of the quantum dot is 5-6nm, the quantum dot emits green light after being excited by the blue light LED, when the radius of the quantum dot is 8-9nm, the quantum dot emits red light after being excited by the blue light LED, the blue light emitted by the blue light LED, the red light and the green light are mixed into white light which can be used for display, in the embodiment, the type and the color of the light emitted by each quantum dot after being excited by a backlight source 11 can be changed by changing the particle size of each quantum dot on a quantum dot film 03, the manufacturing process is simpler and feasible, the manufacturing cost is lower, and when quantum dot films 03 can be simultaneously excited to emit infrared light and other colors, films can be used for fingerprint identification, the infrared light source in the prior art is replaced, the narrow frame of the display device is beneficial to realization of the display screen.
It is understood that the backlight 11 can be not only a blue LED, but also a red LED, a green LED, etc. as long as the light emitted from the backlight 11 is mixed with the light excited by the th quantum dot 06 and the second quantum dot 07 to form white light, of course, if the backlight 11 emits red light and green light simultaneously, only the th quantum dot 06 and no second quantum dot 07 are on the quantum dot film 03, and the blue LED is selected as the backlight 11 in this embodiment because the blue light emitted from the blue LED is most stable.
Optionally, with continued reference to fig. 7 to 10, the backlight 11 (not shown) is a blue LED, the th color light is red light, the second color light is green light, the th quantum dot material includes zinc sulfide, the second quantum dot material includes cadmium selenide, and the third quantum dot material includes lead sulfide, lead selenide, and lead telluride, and the type and color of light emitted by each quantum dot after being excited by the backlight 11 can be changed by changing the particle size of each quantum dot, and the type and color of light emitted by each quantum dot after being excited by the backlight 11 can also be changed by changing the material of each quantum dot.
Optionally, the th quantum dot 06, the second quantum dot 07 and the third quantum dot 08 on the quantum dot film 03 are manufactured by a coating method.
The specific manufacturing method comprises the steps of mixing th quantum dots 06, second quantum dots 07 and third quantum dots 08 with th coating glue according to a proportion determined by to obtain th quantum dot coating glue;
mixing the th quantum dot 06 and the second quantum dot 07 with a second coating adhesive according to a proportion of to obtain a second quantum dot coating adhesive;
the quantum dot 06, the second quantum dot 07 and the third quantum dot 08 are mixed with a third coating adhesive according to a proportion of to obtain a third quantum dot coating adhesive;
preparing pieces of base film, and dividing the base film into region, region corresponding to the fingerprint identification region 02, second region corresponding to the display region 01, and third region corresponding to the transition display region 10 by using a mold;
and (3) coating th quantum dot coating glue on the th region, coating the second quantum dot coating glue on the second region, and coating the third quantum dot coating glue on the third region by a large coating machine to form the quantum dot film 03.
Optionally, referring to fig. 12, fig. 12 is a schematic structural view of display devices provided by the present invention, in fig. 12, a light-emitting surface of a backlight 11 is parallel to a light-emitting surface of a quantum dot film 03, that is, a direct-type backlight is shown, where the backlight module 200 includes the quantum dot film 03, the backlight 11, a lower diffusion sheet 13, a prism sheet 14, and an upper diffusion sheet 15, the quantum dot film 03 is located on the light-emitting surface side of the backlight 11, the lower diffusion sheet 13 is located on the side of the quantum dot film 03 away from the backlight 11 , the prism sheet 14 is located on the side of the lower diffusion sheet 13 away from the quantum dot film 03 , and the upper diffusion sheet 53915 is.
Optionally, referring to fig. 13, fig. 13 is a structural schematic diagram of display devices provided by the present invention, in fig. 13, a light-emitting surface of a backlight 11 intersects a light-emitting surface of a quantum dot film 03, that is, a side-in backlight, where the backlight module 200 includes the quantum dot film 03, the backlight 11, a light guide plate 12, a lower diffuser 13, a prism sheet 14, and an upper diffuser 15, the quantum dot film 03 is located on the light-emitting surface side of the light guide plate 12, the lower diffuser 13 is located on the side of the quantum dot film 03 away from the light guide plate 12 , the prism sheet 14 is located on the side of the lower diffuser 13 away from the quantum dot film 03 , and the upper diffuser 15 is located on the side of the.
The side-in backlight source needs a light guide plate 12, the light guide plate 12 is used for making the light emitted by the backlight source 11 uniform, both the side-in backlight source and the direct-type backlight source need a lower diffusion sheet 13, a prism sheet 14 and an upper diffusion sheet 15, the lower diffusion sheet 13 is used for uniformly processing the light emitted by the light guide plate 12 or the backlight source 11, the prism sheet 14 is used for concentrating the dispersed light emitted by the lower diffusion sheet 13 in an angle range of by using the law of total emission and refraction so as to improve the brightness in the angle range, and the upper diffusion sheet 15 is used for protecting the backlight source 11 from being dirtied or scratched by external objects such as the display panel 100 and protecting the display panel 100 from being scratched by the prism sheet 14.
As can be seen from the above embodiments, the display device provided by the present invention at least achieves the following beneficial effects:
the backlight module is internally provided with a quantum dot film, a third quantum dot on an quantum dot film region corresponding to the fingerprint identification region on the quantum dot film can emit infrared light after being excited by a backlight source, namely, the infrared light required by infrared fingerprint identification can be emitted under the combined action of the quantum dot film and the backlight source, an infrared light source is not required to be independently arranged, so that the power consumption of the display device is reduced, the quantum dot film is arranged in the backlight module and corresponds to the display region, a space is not required to be independently arranged for the quantum dot film, the narrow frame of the display device is favorably realized, the screen occupation ratio is improved, the structure is more exquisite, a quantum dot film region corresponding to the fingerprint identification region can emit the infrared light required by the fingerprint identification and can also emit color light and second color light required by the display under the excitation of the backlight source, the display brightness and the display effect of the display panel are not influenced even if the fingerprint identification region is positioned in the display region AA, and the normal optical quality is ensured.
Although specific embodiments of the invention have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the invention.

Claims (13)

  1. A display device of , comprising:
    the display panel comprises a backlight module and a display panel positioned on the light-emitting side of the backlight module;
    the display panel comprises a display area and a non-display area surrounding the display area, wherein the display area comprises an th display area and a fingerprint identification area;
    the backlight module comprises a backlight source and a quantum dot film, and a light-emitting surface of the backlight source is parallel to or intersected with a light-emitting surface of the quantum dot film;
    the quantum dot film comprises an quantum dot film region corresponding to the fingerprint identification region and a second quantum dot film region corresponding to the display region, wherein the quantum dot film region is provided with quantum dots, second quantum dots and third quantum dots, and the quantum dots and the second quantum dots are arranged on the second quantum dot film region;
    the th quantum dot emits color light after being excited by the backlight source, the second quantum dot emits second color light after being excited by the backlight source, and the third quantum dot emits infrared light after being excited by the backlight source.
  2. 2. The display device of claim 1, wherein the display region further comprises a transition display region, the transition display region being located between the th display region and the fingerprint identification region, the quantum dot film further comprising a third quantum dot film region corresponding to the transition display region, the third quantum dot film region being provided with the th quantum dot and the second quantum dot.
  3. 3. The display device of claim 2, wherein the third quantum dot film region is further provided with the third quantum dots.
  4. 4. The display device of claim 3 wherein the density of the quantum dots in the quantum dot film region is greater than the density of the quantum dots in the third quantum dot film region, and wherein the density of the second quantum dots in the quantum dot film region is greater than the density of the second quantum dots in the third quantum dot film region.
  5. 5. The display device as claimed in claim 1, wherein the th quantum dot density is gradually increased and the second quantum dot density is gradually increased along a direction of the th display area pointing to the fingerprint identification area.
  6. 6. The display device according to claim 3, wherein the density of the third quantum dots is gradually increased along a direction in which the transition display region points to the fingerprint identification region.
  7. 7. The display device as claimed in claim 1, wherein the backlight source is a blue LED, the color light is red light, and the second color light is green light.
  8. 8. The display device as claimed in claim 7, wherein the th quantum dot has a radius of 8-9nm, the second quantum dot has a radius of 5-6nm, and the third quantum dot has a radius of more than 10 nm.
  9. 9. The display device according to claim 7, wherein the th quantum dot comprises zinc sulfide, the second quantum dot comprises cadmium selenide, and the third quantum dot comprises lead sulfide, lead selenide, and lead telluride.
  10. 10. The display device according to claim 1, wherein the th quantum dot, the second quantum dot, and the third quantum dot on the quantum dot film are manufactured by coating.
  11. 11. The display device according to claim 1, wherein when the light-emitting surface of the backlight source intersects with the light-emitting surface of the quantum dot film, the backlight module further comprises a light guide plate, a lower diffuser, a prism sheet, and an upper diffuser;
    the quantum dot film is positioned on the light emitting surface side of the light guide plate;
    the lower diffusion sheet is positioned on the side of the quantum dot film away from the light guide plate ;
    the prism sheet is positioned on the side of the lower diffusion sheet far away from the quantum dot film ;
    the upper diffusion sheet is positioned on the side of the prism sheet away from the lower diffusion sheet .
  12. 12. The display device of claim 1, wherein when the light-emitting surface of the backlight source is parallel to the light-emitting surface of the quantum dot film, the backlight module further comprises a lower diffuser, a prism sheet, and an upper diffuser;
    the quantum dot film is positioned on the light-emitting surface side of the backlight source;
    the lower diffuser is positioned on the side of the quantum dot film away from the backlight ;
    the prism sheet is positioned on the side of the lower diffusion sheet far away from the quantum dot film ;
    the upper diffusion sheet is positioned on the side of the prism sheet away from the lower diffusion sheet .
  13. 13. The display device of claim 1, wherein the shape of the fingerprint identification region comprises a circle or a rectangle.
CN201911016618.6A 2019-10-24 2019-10-24 Display device Pending CN110737133A (en)

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