CN114114753A - Display module and display device - Google Patents
Display module and display device Download PDFInfo
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- CN114114753A CN114114753A CN202111453760.4A CN202111453760A CN114114753A CN 114114753 A CN114114753 A CN 114114753A CN 202111453760 A CN202111453760 A CN 202111453760A CN 114114753 A CN114114753 A CN 114114753A
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- G—PHYSICS
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- 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
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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
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- G—PHYSICS
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- 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
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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
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- 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
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- 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
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- G02F1/15—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 an electrochromic effect
- G02F1/153—Constructional details
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- 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
- G02F1/15—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 an electrochromic effect
- G02F1/153—Constructional details
- G02F1/155—Electrodes
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Abstract
The invention discloses a display module and a display device, which relate to the technical field of display and comprise a display panel, a backlight module and a fingerprint module, wherein the display panel is positioned on a light-emitting surface of the backlight module; the backlight module comprises a backlight hole, the backlight hole penetrates through the backlight module along a first direction, the fingerprint module is positioned in the backlight hole, and the first direction is vertical to a light-emitting surface of the backlight module; the fingerprint module comprises an infrared light source and a fingerprint identification component, and the infrared light source is positioned between the fingerprint identification component and the display panel along a first direction; the display panel comprises a fingerprint identification area positioned in the display area, and the fingerprint identification area is overlapped with the backlight hole along a first direction; in the fingerprint identification area, the display panel comprises a plurality of color resistors filled with quantum dots, and at least two color resistors are filled with quantum dots with different colors. Therefore, the display brightness uniformity of the display area at the position of the backlight hole and other positions is improved, and the display effect of the product is improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display module and a display device.
Background
From the CRT (Cathode Ray Tube) era to the liquid crystal era and now to the OLED (Organic Light-Emitting Diode) era, the display industry has been developing over decades. The display industry is closely related to our life, and display technologies cannot be separated from traditional mobile phones, flat panels, televisions and PCs to current intelligent wearable devices and VR and other electronic devices.
With the pursuit of people for the full-screen of electronic equipment such as mobile phones, researchers are also making research towards the full-screen direction of the display screen to the utmost extent, for example, the under-screen fingerprint identification technology corresponding to the liquid crystal display device, a backlight hole is arranged in a backlight module, a fingerprint identification component is arranged in the area of the backlight hole, which is equivalent to arranging a fingerprint identification area in the display area, and the fingerprint identification area plays a display function in the display stage; in the fingerprint identification stage, the fingerprint identification area is used for fingerprint identification. However, in this design, since the backlight corresponding to the fingerprint identification area is holed, the light from the backlight is difficult to be effectively transmitted to the area, and thus the difference between the brightness of the fingerprint identification area and the display brightness of other display areas is large, and the display effect is poor.
Disclosure of Invention
In view of this, the present invention provides a display module and a display device, which are beneficial to improving the display brightness uniformity of the display area at the position of the backlight hole and other positions, and improving the display effect of the product.
In a first aspect, the present application provides a display module, including a display panel, a backlight module and a fingerprint module, wherein the display panel is located on a light emitting surface of the backlight module;
the backlight module comprises a backlight hole, the backlight hole penetrates through the backlight module along a first direction, the fingerprint module is positioned in the backlight hole, and the first direction is vertical to a light-emitting surface of the backlight module;
the fingerprint module comprises an infrared light source and a fingerprint identification component, and the infrared light source is positioned between the fingerprint identification component and the display panel along the first direction;
the display panel comprises a fingerprint identification area positioned in a display area, and the fingerprint identification area is overlapped with the backlight hole along the first direction; in the fingerprint identification area, the display panel comprises a plurality of color resistors filled with quantum dots, and at least two color resistors are filled with quantum dots with different colors.
In a second aspect, the present invention further provides a display device, including the display module provided in the present invention.
Compared with the prior art, the display module and the display device provided by the invention at least realize the following beneficial effects:
the display module and the display device provided by the embodiment of the invention are provided with a display panel, a backlight module and a fingerprint module, wherein the backlight module is provided with a backlight hole, and the fingerprint module is positioned in the backlight hole. The fingerprint module includes fingerprint identification subassembly and infrared light source, and the region that corresponds with the hole position in a poor light in the display area is the fingerprint identification district, and in the fingerprint identification stage, infrared light source's light directive display panel's play plain noodles, this partial light is after the reflection of touch main part, directive fingerprint module to realize fingerprint identification. Particularly, in the fingerprint identification area, the display panel comprises a plurality of color resistors filled with quantum dots, and the color of the quantum dots filled in at least two color resistors is different. In the display stage, light emitted by the infrared light source is emitted to the fingerprint identification area, the color resistance of the quantum dots is filled in the fingerprint identification area, and the quantum dots are excited to emit light with corresponding colors, so that the display function is realized. So, set up in the infrared light source in fingerprint identification district both can regard as the required light source of fingerprint identification, can regard as again to show stage fingerprint identification district and show and use the light source, be favorable to increasing the display brightness in the display stage in fingerprint identification district, reduce the display brightness difference between display stage fingerprint identification district and other display areas to be favorable to promoting the display brightness uniformity of product, improve the display effect.
Of course, it is not necessary for any product in which the present invention is practiced 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 top view of a display module according to an embodiment of the invention;
FIG. 2 is an AA cross-sectional view of the display module of FIG. 1;
FIG. 3 is a BB cross-sectional view of the display module of FIG. 1;
FIG. 4 is a cross-sectional view of another AA of the display module of FIG. 1;
FIG. 5 is a schematic diagram of an optical path when power is applied to the electrochromic layer;
FIG. 6 is a schematic diagram of one light path of fingerprint recognition light when the electrochromic layer is not energized;
fig. 7 is a partial film structure diagram of a color film substrate in a display module according to an embodiment of the present invention;
fig. 8 is an exploded view of an electrochromic layer and a transparent electrode in a display module according to an embodiment of the disclosure;
fig. 9 is a schematic structural view illustrating an electrical connection between a transparent electrode on a first substrate and a second substrate in a display module according to an embodiment of the invention;
FIG. 10 is a top view of a second substrate in the display module;
FIG. 11 is a schematic view of an arrangement of infrared light sources on a third substrate;
fig. 12 is a schematic structural diagram of a fingerprint module according to an embodiment of the present invention;
FIG. 13 is a cross-sectional view of another AA of the display module of FIG. 1;
fig. 14 is a schematic structural diagram of a display device according to an embodiment of the 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 one exemplary embodiment 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 numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
When the display device with the fingerprint identification function performs fingerprint identification, for example, a touch main body is pressed on a light emitting surface of the display device, the finger is provided with a ridge and a valley, the ridge is in contact with the surface of the display device, and the valley is not in contact with the surface of the display device, so that the reflectivity of light irradiating the surface of the display device corresponding to the valley and the ridge of the fingerprint is different, the intensity of reflected light received by a fingerprint identification assembly in the display device and formed at the position of the ridge is different from that of reflected light received by the fingerprint identification assembly at the position of the valley, and correspondingly, the sizes of photocurrents converted from the reflected light formed at the position of the ridge and the reflected light formed at the position of the valley in the fingerprint identification assembly are different. The ridges and valleys of the fingerprint can be identified according to the magnitude of the photocurrent, and then fingerprint information can be identified.
With the pursuit of people for the full-screen of electronic equipment such as mobile phones, more and more display devices set a fingerprint identification area in a display area, and the fingerprint identification area performs a display function in a display stage and performs a fingerprint identification function in a fingerprint identification stage. However, in the existing design, the phenomenon that the fingerprint identification area is darker than the conventional display area often appears in the display stage, and the whole display effect is seriously influenced.
Therefore, the display module and the display device are improved in structure, and the problem that when the fingerprint identification area is arranged in the display area, the display brightness difference between the fingerprint identification area and the display area is large, so that the display effect is influenced is solved.
The detailed description will be given below with reference to specific drawings and examples.
Fig. 1 is a top view of a display module according to an embodiment of the present invention, fig. 2 is an AA cross-sectional view of the display module in fig. 1, please refer to fig. 1 and fig. 2, the present invention provides a display module 100, which includes a display panel 10, a backlight module 20 and a fingerprint module 30, wherein the display panel 10 is located on a light-emitting surface of the backlight module 20;
the backlight module 20 includes a backlight hole K along a first direction D1, the backlight hole K penetrates through the backlight module 20, the fingerprint module 30 is located in the backlight hole K, and the first direction D1 is perpendicular to a light-emitting surface of the backlight module 20;
the fingerprint module 30 includes an infrared light source 31 and a fingerprint identification component 32, and along a first direction D1, the infrared light source 31 is located between the fingerprint identification component 32 and the display panel 10;
the display panel 10 includes a fingerprint recognition area a2 located at the display area a0, the fingerprint recognition area a2 overlapping the backlight hole K in the first direction D1; in the fingerprint identification area a2, the display panel 10 includes a plurality of color resists 40 filled with quantum dots, and at least two of the color resists 40 are filled with quantum dots of different colors.
Specifically, with reference to fig. 1 and fig. 2, the display module according to the embodiment of the present invention is provided with a display panel 10, a backlight module 20 and a fingerprint module 30, wherein the backlight module 20 is provided with a backlight hole K, and the fingerprint module 30 is located in the backlight hole K. Optionally, the backlight module 20 includes a back plate, and the back plate is bent at a position corresponding to the backlight hole K to serve as an inner wall of the backlight hole K, so as to prevent light of the backlight module 20 from leaking into the backlight hole K. Fingerprint module 30 includes fingerprint identification subassembly 32 and infrared light source 31, and infrared light source 31 is located between fingerprint module 30 and display panel 10, and at the fingerprint identification stage, the infrared light directive display panel 10's that infrared light source 31 sent goes out the plain noodles, reachs the position that the touch subject was located. Optionally, the fingerprint identification component 32 includes an infrared sensor for receiving infrared light reflected via the touch subject during the fingerprint identification phase.
The area that corresponds with backlight hole K position in display area A0 is fingerprint identification district A2, integrates fingerprint identification district A2 in the design of display area, is favorable to realizing the design of the comprehensive screen of product. At the fingerprint identification stage, the light that infrared source 31 sent shoots at the play plain noodles of display panel 10, and this part light is after the reflection of touch subject, shoots at fingerprint module 30 to realize fingerprint identification. In particular, in the fingerprint identification area a2, the display panel 10 includes a plurality of color resistors 40 filled with quantum dots, and at least two of the color resistors 40 are filled with quantum dots of different colors. In the display stage, the infrared light emitted from the infrared light source 31 is emitted to the color resistor 40 filled with quantum dots in the fingerprint identification area a2, and the quantum dots are excited to emit light of corresponding colors, thereby realizing the display function. Therefore, the infrared light source 31 arranged in the fingerprint identification area A2 can be used as a light source required by fingerprint identification and can also be used as a light source for displaying in the fingerprint identification area A2 in the display stage, so that the display brightness of the fingerprint identification area A2 in the display stage is increased, the display brightness difference between the fingerprint identification area A2 and the other display areas A0 in the display stage is reduced, the display brightness uniformity of a product is improved, and the display effect is improved.
It should be noted that fig. 1 only illustrates the display module in the present invention by taking the display module with a rectangular structure as an example, in some other embodiments of the present invention, the display module may be further configured with other shapes according to actual requirements, for example, a rounded rectangle, a circle, an ellipse, or other shapes including an arc-shaped structure, which is not limited in this respect. The location and shape of the fingerprint identification area a2 in fig. 1 are also only schematic, and this embodiment only shows an embodiment in which the fingerprint identification area a2 is disposed in the display area a0 near the lower border of the display module, and in some other embodiments of the present invention, the fingerprint identification area a2 may be disposed in any other feasible location in the display area a 0. In addition, the shape and number of the fingerprint identification areas a2 can be set according to actual requirements, and fig. 1 only illustrates that the display module includes one fingerprint identification area a2, and the outline of the fingerprint identification area a2 is rectangular, but in some other embodiments of the present invention, the shape of the fingerprint identification area a2 can be set to be elliptical or circular.
Fig. 2 shows a relative position relationship of the display panel 10, the backlight module 20 and the fingerprint module 30, and does not limit the actual film layer structure of the display panel 10, the backlight module 20 and the fingerprint module 30. Fig. 3 is a BB cross-sectional view of the display module in fig. 1, in which the embodiment shows a film structure of an area where the fingerprint identification area a2 is not disposed in the display device, optionally, the display panel 10 provided in the embodiment of the present invention is a liquid crystal display panel 10, the backlight module 20 may be a direct type backlight module 20 or a side type backlight module 20, and for the specific film structures of the display panel 10 and the backlight module 20 in the non-fingerprint identification area, reference may be made to the structures of the display panel 10 and the backlight module 20 in the prior art, which is not repeated herein.
Optionally, in the fingerprint identification area a2, the color resistor 40 included in the display panel 10 is a transparent color resistor, and the quantum dots are filled in the transparent color resistor. In the fingerprint recognition stage, a part of the infrared light emitted from the infrared light source 31 is emitted to the touch subject, and the light reflected by the touch subject passes through the color resistor 40 and then is emitted to the fingerprint recognition component 32. In the embodiment of the invention, the color resistance of the fingerprint identification area A2 is set as the transparent color resistance, and the light reflected by the touch main body can be emitted to the fingerprint identification component 32 more after passing through the transparent color resistance, so that the quantity of the light which can be sensed by the fingerprint identification component 32 is increased, and the sensitivity of the fingerprint identification process is favorably improved.
Optionally, referring to fig. 2 and fig. 3, in the display module provided in the embodiment of the present invention, the display panel 10 includes a color film substrate 11 and an array substrate 12 that are oppositely disposed, and a liquid crystal 13 is filled between the color film substrate 11 and the array substrate 12, where the color film substrate 11 includes a first substrate 01, and in a normal display area a1 (other areas except for a fingerprint identification area in the display area), the color film substrate 11 includes a black matrix BM disposed on the first substrate 01, the black matrix BM defines a plurality of pixel openings, and color resistors are filled in the pixel openings, for example, red color resistors, green color resistors, blue color resistors, and the like are respectively filled in different pixel openings, and optionally, the light of the backlight module 20 is white light, and the white light correspondingly emits different colors of light when the white light irradiates color resistors of different colors, so as to achieve a normal color display function of the normal display area a 0. In a display area A0 corresponding to the fingerprint identification area A2, the color resistance is designed differently, the introduced color resistance is quantum dot color resistance, and the quantum dot color resistance can emit light rays with corresponding colors under the excitation of infrared light rays.
In order to ensure that the light reflected by the touch object can be transmitted to the fingerprint identification module 32 more during the fingerprint identification process, the black matrix BM may not be disposed in the fingerprint identification area a2, for example, referring to fig. 4, fig. 4 is another AA sectional view of the display module in fig. 1, and this embodiment shows that the electrochromic layer 50 is disposed in the fingerprint identification area a2 instead of the black matrix.
With continued reference to fig. 4, in an alternative embodiment of the present invention, the display panel 10 includes the first substrate 01, and the color resistor 40 is located on a side of the first substrate 01 facing the backlight module 20; in the fingerprint identification area a2, the display panel 10 includes an electrochromic layer 50 disposed on a side of the first substrate 01 facing the backlight module 20, the electrochromic layer 50 includes an open area, and the color resistor 40 covers the open area; the electrochromic layer 50 appears black in the energized state and transparent in the unenergized state.
Specifically, in the fingerprint recognition area a2, the black matrix is not provided, but the electrochromic layer 50 is provided on the side of the first substrate facing the backlight module 20, the electrochromic layer 50 defining a plurality of opening areas, and the color resists 40 in the fingerprint recognition area a2 cover the opening areas. Optionally, the electrochromic layer 50 comprises an electrochromic material that undergoes a stable, reversible color change under the influence of an applied electric field. In the present invention, the electrochromic layer 50 is black in the energized state and transparent in the unenergized state. In this way, in the display stage, the electrochromic layer 50 can be powered on to be black to serve as the function of the black matrix BM, for example, please refer to fig. 5 to avoid the problem of light leakage between color resists corresponding to quantum dots of different colors, wherein fig. 5 is a schematic diagram of a light path when the electrochromic layer 50 is powered on. At the fingerprint recognition stage, an electric field may not be applied to the electrochromic layer 50, so that the electrochromic layer 50 is in a transparent state, for example, referring to fig. 6, in the light reflected by the touch subject, a part of the light can be emitted to the fingerprint recognition component 32 through the transparent electrochromic layer 50, thereby greatly increasing the amount of light sensed by the fingerprint recognition component 32, and further facilitating the improvement of the sensitivity of the fingerprint recognition process, wherein fig. 6 is a schematic light path diagram of the fingerprint recognition light when the electrochromic layer 50 is not powered on.
Optionally, the electrochromic layer 50 provided by the embodiment of the present invention may include IrO2The first substrate may be coated by CVD (Chemical Vapor Deposition) or PVD (Physical Vapor Deposition).
Fig. 7 is a partial film structure diagram of a color filter substrate in a display module according to an embodiment of the present invention, which shows a film structure of a fingerprint identification area a2 and a portion of a conventional display area a0 adjacent to the fingerprint identification area a 2.
Referring to fig. 7, in an alternative embodiment of the present invention, in the fingerprint identification area a2, the display panel 10 includes a plurality of transparent electrodes 60, the transparent electrodes 60 are located between the first substrate 01 and the electrochromic layer 50 along the first direction D1, and the transparent electrodes 60 are electrically connected to the electrochromic layer 50.
In particular, to enable providing an electric field to the electrochromic layer 50, the present application introduces a transparent electrode 60 between the electrochromic layer 50 and the first substrate 01, optionally the transparent electrode 60 being in direct contact with the electrochromic layer 50. When an electrical signal is provided to the transparent electrode 60, the electrical signal will be able to be conducted through the transparent electrode 60 to the electrochromic layer 50, rendering the electrochromic layer 50 black. When the electrical signal applied to the transparent electrode 60 is removed, the electrochromic layer 50 is not affected by the electrical signal, and thus is in a transparent state, thereby satisfying the requirement of supplying power to the electrochromic layer 50 under different use conditions. In addition, when the electrode for supplying an electric signal to the electrochromic layer 50 is provided as the transparent electrode 60, in the fingerprint recognition stage, the light reflected by the touch subject can smoothly pass through the transparent electrode 60 and the transparent electrochromic layer 50 to reach the fingerprint recognition assembly 32, and therefore, even though the transparent electrode 60 is introduced, the amount of the fingerprint recognition light is not or hardly affected, thereby being advantageous to ensure the sensitivity of fingerprint recognition.
Fig. 8 is an exploded view of the electrochromic layer 50 and the transparent electrode 60 of the display module according to the embodiment of the invention, please refer to fig. 7 and 8, and optionally, in the fingerprint identification area a2, the transparent electrode 60 and the electrochromic layer 50 are overlapped along the first direction D1. So, at the fingerprint identification stage, the signal of telecommunication on the transparent electrode 60 layer can reliably be transmitted to electrochromic layer 50, ensures that electrochromic layer 50 presents for transparent state at the fingerprint identification stage, avoids causing the sheltering from to fingerprint identification light.
With continued reference to FIG. 8, in an alternative embodiment of the present invention, the transparent electrodes 60 are electrically connected. When the transparent electrodes 60 providing electrical signals for the electrochromic layers 50 in the fingerprint identification area a2 are electrically connected, the transparent electrodes 60 are in an equipotential state, and the same first electrical connection terminal 71 is used to supply power to all the transparent electrodes 60, so that the state change of the electrochromic layers 50 in the fingerprint identification area a2 can be uniformly controlled, and the control process of the display module on the electrochromic layers 50 can be simplified.
Fig. 9 is a schematic structural diagram illustrating a transparent electrode 60 on a first substrate 11 of a display module according to an embodiment of the present invention electrically connected to a second substrate 12, please refer to fig. 2, fig. 7, fig. 8, and fig. 9, in an alternative embodiment of the present invention, a display panel 10 includes the first substrate 11 and the second substrate 12 disposed opposite to each other, where the first substrate 11 includes a first substrate 01; the first substrate 11 further includes first electrical connection terminals 71, and the transparent electrodes 60 are electrically connected to the first electrical connection terminals 71; the second substrate 12 includes a second electrical connection terminal 72, and the first electrical connection terminal 71 and the second electrical connection terminal 72 are electrically connected by a conductive paste 73.
Optionally, the first substrate 11 in the display module is a color filter substrate, the second substrate 12 is an array substrate, and a liquid crystal 13 is filled between the first substrate 11 and the second substrate 12. In order to realize the transmission of the electrical signal to the transparent electrode 60, the transparent electrode 60 is electrically connected to the first electrical connection terminal 71, and the first electrical connection terminal 71 is electrically connected to the second electrical connection terminal 72 on the second substrate 12 through the conductive adhesive 73, so that, in the display stage, the electrical signal is transmitted to the transparent electrode 60 sequentially through the second electrical connection terminal 72, the conductive adhesive 73 and the first electrical connection terminal 71, thereby realizing the function of transmitting the electrical signal from the second substrate 12 to the transparent electrode 60 on the first substrate 11, and further realizing the control of the state of the electrochromic layer 50 in different stages.
Alternatively, the conductive paste 73 connecting the first electrical connection terminals 71 on the first substrate 11 and the second electrical connection terminals 72 on the second substrate 12 may be selected to be a conductive silver paste.
Fig. 10 is a top view of the second substrate 12 in the display module, please refer to fig. 9 and 10, optionally, the size of the first substrate 11 is slightly smaller than that of the second substrate 12, a bonding area BD is disposed on a region of the second substrate 12 that is not overlapped with the first substrate 11, in an alternative embodiment of the invention, the second substrate 12 includes the bonding area BD and a plurality of conductive pads P located in the bonding area BD, the second electrical connection terminal 72 is electrically connected to at least one of the conductive pads P, and the bonding area BD is used for bonding a control chip IC or a flexible circuit board, such as the one shown in fig. 1.
Optionally, at least a part of the chips on the display panel 10 is provided by a control chip IC, and the control chip can be directly bound to the binding area BD, and at this time, the control chip is electrically connected to the conductive pad P of the binding area BD, so as to achieve electrical connection with the display panel 10; in addition, the binding area BD can be bound with the flexible circuit board, and the control chip is bound on the flexible circuit board, at this time, the flexible circuit board is electrically connected with the conductive pad P of the binding area BD, and a signal of the control chip is electrically connected with the display panel 10 through the flexible circuit board and the conductive pad P.
In the embodiment of the present invention, the second electrical connection terminal 72 is electrically connected to the conductive pad P of the bonding area BD, so that the control chip can provide an electrical signal to the second electrical connection terminal 72 through the conductive pad P, and further transmit the electrical signal to the electrochromic layer 50 on the first substrate 11 through the conductive adhesive 73 and the first electrical connection terminal 71, thereby controlling the state of the electrochromic layer 50.
Alternatively, referring to fig. 2 and 8 to 10, the first electrical connection terminal 71 on the first substrate 11 is disposed on a side of the first substrate 11 close to the bonding area BD, and the fingerprint identification area a2 may also be disposed on a side of the display area a0 close to the bonding area BD, so as to reduce a distance between the transparent electrode 60 and the first electrical connection terminal 71, and reduce a length of a wire between the transparent electrode 60 and the first electrical connection terminal 71, thereby facilitating reduction of difficulty in the wire between the transparent electrode 60 and the first electrical connection terminal 71, and facilitating transmission of an electrical signal from the control chip to the transparent electrode 60. Furthermore, when the wiring length between the transparent electrode 60 and the first electrical connection terminal 71 becomes small, it is also advantageous to reduce the transmission path of the electrical signal so that the electrochromic layer 50 can be quickly converted into a transparent state in the fingerprint recognition stage.
With continued reference to fig. 2, in an alternative embodiment of the present invention, the display module further includes a third substrate 33 electrically connected to the infrared light source 31, along the first direction D1, the third substrate 33 is located between the infrared light source 31 and the fingerprint identification device 32, and the third substrate 33 is a transparent substrate.
Specifically, in the fingerprint module 30 provided in the embodiment of the present invention, the infrared light source 31 is bound on the third substrate 33, and along the first direction D1, the infrared light source 31 and the fingerprint identification component 32 are respectively disposed on two sides of the third substrate 33, and the infrared light source 31 is closer to the display panel 10 than the fingerprint identification component 32. Optionally, a driving circuit composed of circuit elements is disposed on the third substrate 33, and the infrared light source 31 is electrically connected to the driving circuit and is used for driving the infrared light source 31 to emit light. In particular, in the present invention, the third substrate 33 is a transparent substrate, and in the fingerprint identification stage, the light reflected by the touch object can smoothly pass through the transparent substrate and emit to the fingerprint identification assembly 32 after passing through the color resistor and the electrochromic layer 50, which is also beneficial to increase the amount of light received by the fingerprint identification assembly 32 and improve the fingerprint identification sensitivity.
Fig. 11 is a schematic view illustrating an arrangement of the infrared light source 31 on the third substrate 33, and in an alternative embodiment of the present invention, referring to fig. 2 and 11, the infrared light source 31 includes a plurality of infrared light emitting elements 310, and the infrared light emitting elements 310 are uniformly arranged on the third substrate 33.
It is understood that, in the embodiment of the present invention, since the infrared light source 31 and the third substrate 33 are both disposed in the backlight hole K, the shape of the third substrate 33 is adapted to the shape of the backlight hole K, and when the backlight hole K has a circular structure, the third substrate 33 may be disposed in the circular structure; when the backlight hole K has a rectangular structure, the third substrate 33 may be disposed in a rectangular structure. The embodiment of fig. 11 is described by taking the third substrate 33 having a rectangular structure as an example. The infrared light emitting elements 310 are uniformly arranged on the transparent substrate, specifically, the distance between any two adjacent infrared light emitting elements 310 is equal along the arrangement direction of the infrared light emitting elements 310, for example, fig. 11 illustrates a manner in which the infrared light emitting elements 310 are arranged in a matrix. Alternatively, the infrared light emitting elements 310 are uniformly arranged in the fingerprint identification area a 2. Thus, during the display period, the light emitted from the infrared light emitting device 310 can be uniformly emitted to the fingerprint identification area a2, so that the display brightness of the fingerprint identification area a2 is more uniform. Note that fig. 11 illustrates only 5 × 4 infrared light emitting elements 310 on the third substrate, and does not represent the number of infrared light emitting elements actually provided on the third substrate 33.
With continued reference to FIG. 11, in an alternative embodiment of the present invention, there is a first gap G between any two adjacent infrared light emitting elements 310, and the width of the first gap G along the arrangement direction of two adjacent infrared light emitting elements 310 is D, and D is greater than or equal to 60 μm and less than or equal to 200 μm.
Specifically, referring to fig. 2 and 11, in the fingerprint recognition stage, the light reflected by the touch object is blocked by the infrared light emitting elements 310 when being transmitted to the infrared light source region, and is emitted to the fingerprint recognition assembly 32 through the area of the first gap G between the infrared light emitting elements 310. If the width of the first gap G is too small, for example, less than 60 μm, the infrared light emitting devices 310 are too dense, and a large portion of the fingerprint light is blocked, and only a small amount of light can be transmitted to the fingerprint identification assembly 32, which is not favorable for improving the sensitivity of fingerprint identification. If the width of the first gap G is set to be larger, for example, larger than 200 μm, the arrangement of the infrared light emitting elements 310 is sparse, and the amount of light that can be provided to the fingerprint identification area a2 by the infrared light emitting elements 310 may be insufficient during the display period, so that the display brightness difference still exists between the fingerprint identification area a2 and the conventional display area a 0. Therefore, in the present invention, the width of the first gap G between two adjacent infrared light emitting elements 310 is set to be equal to or greater than 60 μm and equal to or less than D and equal to or less than 200 μm, and the width of the first gap G can ensure that a large part of the light reflected by the touch subject can be transmitted to the fingerprint identification assembly 32 through the first gap G in the fingerprint identification stage, so as to increase the amount of light that can be received by the fingerprint identification assembly 32 and improve the fingerprint identification sensitivity; in addition, the width of the first gap G is set to be within the above range, so that the arrangement density of the infrared light emitting elements 310 can meet the requirement of the light quantity required by the fingerprint identification area a2 in the display stage, the display brightness of the fingerprint identification area a2 is consistent or tends to be consistent with the display brightness of the conventional display area a0, the overall display brightness uniformity of the display device is favorably improved, and the display effect of the product is favorably improved.
Fig. 12 is a schematic structural diagram of a fingerprint module 30 according to an embodiment of the present invention, which illustrates a relative position relationship between a first interval G between infrared light emitting elements 310 and an infrared light sensing unit in a fingerprint identification module 32. Referring to fig. 12, in an alternative embodiment of the present invention, the fingerprint identification assembly 32 includes an infrared light sensing unit S overlapping the first interval G along a first direction D1.
Specifically, the infrared light sensing unit S in the fingerprint recognition assembly 32 of the present invention is disposed corresponding to the first interval G between the infrared light emitting elements 310, that is, the infrared light sensing unit S overlaps the first interval G in the first direction D1. Because the light reflected by the touch body can be emitted to the infrared light sensing unit S in the fingerprint identification assembly 32 only through the first interval G, the infrared light sensing unit S and the first interval G are correspondingly overlapped, so that the infrared light sensing unit S and the first interval G can be accurately emitted to the infrared light sensing unit S after passing through the first interval G, the phenomenon of waste of the fingerprint identification light is avoided, and the accuracy and the sensitivity of the fingerprint identification are improved.
In an alternative embodiment of the invention, the brightness of the infrared light source 31 is adjustable. Optionally, in the present invention, the infrared light emitting device 310 may be an infrared Mini LED, and the brightness of the infrared light emitting device 310 is adjustable. So, can adjust the display brightness in fingerprint identification district according to the display brightness in the display area that non-fingerprint identification district corresponds for display brightness homogeneous in fingerprint identification district and conventional display area shows the stage in the demonstration, and then be favorable to promoting display device's whole display brightness homogeneity more, promote whole display effect.
Referring to fig. 1 and 2, in an alternative embodiment of the present invention, the display area a0 includes a first display area a1, and the first display area a1 does not overlap with the fingerprint identification area a 2; in the first display area a1, the display panel 10 includes a first color resist 81, a second color resist 82, and a third color resist 83; in fingerprint identification area a2, the color resistors include a first color resistor 41, a second color resistor 42, and a third color resistor 43, where the first color resistor 41 fills the first color quantum dots, the second color resistor 42 fills the second color quantum dots, and the third color resistor 43 fills the third color quantum dots.
Specifically, the first display region a1 mentioned in the embodiment of the present invention refers to a region of the display region a0 other than the fingerprint identification region a2, and when the first display region a1 includes the first color resistor 81, the second color resistor 82 and the third color resistor 83, the fingerprint identification region a2 also includes the color resistors for filling the three color quantum dots, that is, the first color resistor 41 for filling the first color quantum dot, the second color resistor 42 for filling the second color quantum dot and the third color resistor 43 for filling the third color quantum dot, so that the light emitted by the infrared light source 31 can make the color resistor of the first color appear the first color after the quantum dot of the first color is excited, can make the second color resistor 42 appear the second color after the quantum dot of the second color is excited, and can make the third color resistor 43 appear the third color after the quantum dot of the third color is excited. In the display stage, the color that can be presented by the color resistor in the fingerprint identification area a2 is the same as the color that can be presented by the color resistor in the first display area a1, and the image display effect that can be presented by the fingerprint identification area a2 and the first display area a1 is more consistent, so that the overall display effect of the product is more favorably improved.
Optionally, the first color, the second color and the third color may be respectively embodied as red, green and blue, so as to realize a color display effect of the display module.
Fig. 13 is a cross-sectional view of another AA of the display module shown in fig. 1, which illustrates another color resistance distribution of the first display area a1 and the fingerprint identification area a 2. referring to fig. 13, in an alternative embodiment of the present invention, the display panel 10 further includes a transparent color resistance 84 in the first display area a 1; in fingerprint identification area a2, the color resistor further includes a fourth color resistor 44, and the fourth color resistor 44 does not fill with quantum dots.
Specifically, the present embodiment shows a scheme of disposing a transparent color resistor in the first display area a1, and in addition to the first color resistor 81, the second color resistor 82 and the third color resistor 83, the present invention introduces a transparent color resistor in the first display area a1, which is beneficial to improving the display brightness of the first display area a 1. Adaptively, in the fingerprint identification area a2, in addition to the first color resistor 41 filled with the first color quantum dots, the second color resistor 42 filled with the second color quantum dots, and the third color resistor 43 filled with the third color quantum dots, the present invention further introduces the fourth color resistor 44 not filled with the quantum dots, so that on one hand, the colors that can be presented by the color resistors of the fingerprint identification area a2 and the first display area a1 are consistent, and on the other hand, the display brightness of the fingerprint identification area a2 in the display stage is also favorably improved to be adapted to the display brightness of the first display area a 1. Therefore, the whole display brightness uniformity of the display module is promoted, and the whole display effect of the product is promoted.
Based on the same inventive concept, the present invention further provides a display device, and fig. 14 is a schematic structural diagram of a display device 200 according to an embodiment of the present invention, where the display device 200 includes the display module 100 according to any of the embodiments of the present application. According to the invention, the infrared light source and the fingerprint module are arranged in the backlight, and light rays emitted by the infrared light source can be used as light rays required by fingerprint identification at a fingerprint identification stage; at the demonstration stage, the light that infrared source sent can also arouse to fill the look that has quantum dot and hinder and show corresponding colour, and then as showing required light, is favorable to reducing the demonstration luminance difference in fingerprint identification district and non-fingerprint identification district, promotes the whole demonstration luminance homogeneity of product, promotes whole display effect. For the specific embodiment of the display device, reference may be made to the above-mentioned example of the display module, and the description of the present invention is omitted here for brevity.
It should be noted that the display device 200 provided in the embodiment of the present invention can be embodied as any product or component with practical functions, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.
In summary, the display module and the display device provided by the invention at least achieve the following beneficial effects:
the display module and the display device provided by the embodiment of the invention are provided with a display panel, a backlight module and a fingerprint module, wherein the backlight module is provided with a backlight hole, and the fingerprint module is positioned in the backlight hole. The fingerprint module includes fingerprint identification subassembly and infrared light source, and the region that corresponds with the hole position in a poor light in the display area is the fingerprint identification district, and in the fingerprint identification stage, infrared light source's light directive display panel's play plain noodles, this partial light is after the reflection of touch main part, directive fingerprint module to realize fingerprint identification. Particularly, in the fingerprint identification area, the display panel comprises a plurality of color resistors filled with quantum dots, and the color of the quantum dots filled in at least two color resistors is different. In the display stage, light emitted by the infrared light source is emitted to the fingerprint identification area, the color resistance of the quantum dots is filled in the fingerprint identification area, and the quantum dots are excited to emit light with corresponding colors, so that the display function is realized. So, set up in the infrared light source in fingerprint identification district both can regard as the required light source of fingerprint identification, can regard as again to show stage fingerprint identification district and show and use the light source, be favorable to increasing the display brightness in the display stage in fingerprint identification district, reduce the display brightness difference between display stage fingerprint identification district and other display areas to be favorable to promoting the display brightness uniformity of product, improve the display effect.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (14)
1. A display module is characterized by comprising a display panel, a backlight module and a fingerprint module, wherein the display panel is positioned on a light-emitting surface of the backlight module;
the backlight module comprises a backlight hole, the backlight hole penetrates through the backlight module along a first direction, the fingerprint module is positioned in the backlight hole, and the first direction is vertical to a light-emitting surface of the backlight module;
the fingerprint module comprises an infrared light source and a fingerprint identification component, and the infrared light source is positioned between the fingerprint identification component and the display panel along the first direction;
the display panel comprises a fingerprint identification area positioned in a display area, and the fingerprint identification area is overlapped with the backlight hole along the first direction; in the fingerprint identification area, the display panel comprises a plurality of color resistors filled with quantum dots, and at least two color resistors are filled with quantum dots with different colors.
2. The display module according to claim 1, wherein the display panel comprises a first substrate, and the color resistor is located on a side of the first substrate facing the backlight module;
in the fingerprint identification area, the display panel comprises an electrochromic layer arranged on one side of the first substrate facing the backlight module, the electrochromic layer comprises an opening area, and the color resistor covers the opening area; the electrochromic layer is black in the energized state and transparent in the unenergized state.
3. The display module of claim 2, wherein the display panel comprises a plurality of transparent electrodes in the fingerprint identification area, the transparent electrodes are located between the first substrate and the electrochromic layer along the first direction, and the transparent electrodes are electrically connected to the electrochromic layer.
4. The display module of claim 3, wherein each of the transparent electrodes is electrically connected.
5. The display module according to claim 3, wherein the display panel comprises a first substrate and a second substrate disposed opposite to each other, the first substrate comprising the first substrate;
the first substrate further comprises a first electric connecting terminal, and the transparent electrodes are electrically connected with the first electric connecting terminal;
the second substrate comprises a second electric connecting terminal, and the first electric connecting terminal is electrically connected with the second electric connecting terminal through conductive adhesive.
6. The display module assembly of claim 5, wherein the second substrate comprises a bonding area and a plurality of conductive pads located in the bonding area, the second electrical connection terminal is electrically connected to at least one of the conductive pads, and the bonding area is used for bonding a control chip or a flexible circuit board.
7. The display module of claim 1, further comprising a third substrate electrically connected to the infrared light source, wherein the third substrate is located between the infrared light source and the fingerprint identification assembly along the first direction, and the third substrate is a transparent substrate.
8. The display module of claim 7, wherein the infrared light source comprises a plurality of infrared light emitting elements, and the infrared light emitting elements are uniformly arranged on the third substrate.
9. The display module according to claim 7, wherein a first space is formed between any two adjacent infrared light emitting elements, and the width of the first space is D, and D is greater than or equal to 60 μm and less than or equal to 200 μm along the arrangement direction of the two adjacent infrared light emitting elements.
10. The display module of claim 9, wherein the fingerprint identification component comprises an infrared light sensing unit, and the infrared light sensing unit overlaps the first gap along the first direction.
11. The display module of claim 1, wherein the infrared light source has an adjustable brightness.
12. The display module of claim 1, wherein the display area comprises a first display area, and the first display area is not overlapped with the fingerprint identification area; in the first display area, the display panel comprises a first color resistor, a second color resistor and a third color resistor; in the fingerprint identification area, the color resistor comprises a first color resistor, a second color resistor and a third color resistor, wherein the first color resistor is filled with first color quantum dots, the second color resistor is filled with second color quantum dots, and the third color resistor is filled with third color quantum dots.
13. The display module of claim 12, wherein in the first display area, the display panel further comprises a transparent color resist; in the fingerprint identification area, the color resistor further comprises a fourth color resistor, and quantum dots are not filled in the fourth color resistor.
14. A display device, comprising the display module of any one of claims 1 to 13.
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