CN110647861B - Liquid crystal display panel and display device - Google Patents
Liquid crystal display panel and display device Download PDFInfo
- Publication number
- CN110647861B CN110647861B CN201910937258.7A CN201910937258A CN110647861B CN 110647861 B CN110647861 B CN 110647861B CN 201910937258 A CN201910937258 A CN 201910937258A CN 110647861 B CN110647861 B CN 110647861B
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- light source
- liquid crystal
- crystal display
- display panel
- detection light
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- 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
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
-
- 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
- G02F1/13338—Input devices, e.g. touch panels
-
- 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
- G06V10/147—Details of sensors, e.g. sensor lenses
Abstract
The embodiment of the invention provides a liquid crystal display panel and a display device, comprising: an array substrate and an opposite substrate which are oppositely arranged; wherein, be provided with the fingerprint identification layer in one side that the subtend base plate faces array substrate, the fingerprint identification layer includes: a plurality of light sensing detectors; a detection light source generator is arranged on one side of the opposite substrate, which faces away from the array substrate, and the detection light source generator is configured to emit invisible light. In the invention, the fingerprint identification layer comprising a plurality of light sensing detectors is arranged on one side of the opposite substrate facing the array substrate, and the detection light source generator capable of emitting invisible light is arranged on one side of the opposite substrate departing from the array substrate, so that the detection light source generator is close to the fingerprint contact surface and the optical path between the detection light source generator and the fingerprint identification layer is short, and thus, the energy loss in the process of transmitting the invisible light to the light sensing detectors after being reflected by fingers is small, and the full-screen display is realized, and meanwhile, the fingerprint identification definition and the sensitivity are high.
Description
Technical Field
The invention relates to the technical field of display, in particular to a liquid crystal display panel and a display device.
Background
A full screen is the development trend of mobile terminals (such as mobile phones) at the present stage, and an underscreen fingerprint identification technology is an important technical means for realizing full screen display. Specifically, fingerprint identification technology is installed in the display screen below with fingerprint identification device (for example fingerprint identification module) under the screen to realize carrying out the fingerprint identification operation in the display area inside of display screen, need not set up the fingerprint collection region in the positive region except that the display area of electronic equipment. At present, the technology of identifying fingerprints under a screen is mainly applied to an Organic Light-Emitting Diode (OLED) display screen, but the OLED display screen is high in production cost and difficult to popularize in middle and low-end products, so that the realization of comprehensive screen display of a liquid crystal display (TFT-LCD) is a development direction for improving the competitiveness of TFT-LCD products. However, the scheme of arranging the fingerprint identification module below the TFT-LCD to realize full-screen display has high difficulty in fingerprint identification.
Disclosure of Invention
In view of this, embodiments of the present invention provide a liquid crystal display panel and a display device, so as to achieve full-screen display and improve the fingerprint recognition definition and sensitivity of the liquid crystal display panel.
Therefore, an embodiment of the present invention provides a liquid crystal display panel, including: an array substrate and an opposite substrate which are oppositely arranged; wherein the content of the first and second substances,
a fingerprint identification layer is arranged on one side of the opposite substrate facing the array substrate, and comprises: a plurality of light sensing detectors;
and a detection light source generator is arranged on one side of the opposite substrate, which faces away from the array substrate, and is configured to emit invisible light.
In a possible implementation manner, in the liquid crystal display panel provided in an embodiment of the present invention, the opposite substrate includes: the black matrix display device comprises a substrate base plate and a black matrix positioned on the substrate base plate;
the fingerprint identification layer is positioned between the substrate base plate and the black matrix;
and the orthographic projection of each light sensing detector on the substrate base plate is positioned in the orthographic projection of the black matrix on the substrate base plate.
In a possible implementation manner, in the liquid crystal display panel provided by the embodiment of the invention, the detection light source generator is a detection light source layer disposed on an entire surface of a side of the substrate facing away from the black matrix.
In a possible implementation manner, in the liquid crystal display panel provided in the embodiment of the present invention, the material of the detection light source layer is an organic photoluminescent material doped with yttrium oxide.
In a possible implementation manner, in the liquid crystal display panel provided in the embodiment of the present invention, the liquid crystal display panel further includes: the substrate comprises a substrate base plate, a detection light source layer and a shielding electrode layer, wherein the detection light source layer is arranged on one side, which is far away from the substrate base plate, of the detection light source layer, and the insulating layer is arranged between the shielding electrode layer and the detection light source layer.
In a possible implementation manner, in the liquid crystal display panel provided in the embodiment of the present invention, the detection light source layer is made of an organic electroluminescent material.
In a possible implementation manner, in the liquid crystal display panel provided in the embodiment of the present invention, the liquid crystal display panel further includes: and the shielding electrode layer is positioned on one side of the detection light source layer, which faces away from the substrate base plate, and is configured to control the organic electroluminescent material to emit invisible light.
In a possible implementation manner, in the liquid crystal display panel provided in an embodiment of the present invention, the liquid crystal display panel further includes: the protective cover plate is positioned on one side, away from the array substrate, of the opposite substrate;
the detection light source generator is a light emitting module fixed in a frame area of one side of the protection cover plate facing the opposite substrate.
In a possible implementation manner, in the liquid crystal display panel provided in an embodiment of the present invention, the liquid crystal display panel further includes: the chip is positioned in the frame area of the liquid crystal display panel and is configured to identify fingerprint information according to the electric signals of the light sensing detectors.
Based on the same inventive concept, an embodiment of the present invention further provides a display apparatus, including: the backlight source and the liquid crystal display panel are positioned on the light-emitting side of the backlight source; wherein, the first and the second end of the pipe are connected with each other,
the liquid crystal display panel is the liquid crystal display panel.
The invention has the following beneficial effects:
the embodiment of the invention provides a liquid crystal display panel and a display device, comprising: an array substrate and an opposite substrate which are oppositely arranged; wherein, be provided with the fingerprint identification layer in one side of subtending base plate towards array substrate, the fingerprint identification layer includes: a plurality of light sensing detectors; a detection light source generator is arranged on one side of the opposite substrate, which faces away from the array substrate, and the detection light source generator is configured to emit invisible light. In the invention, the fingerprint identification layer comprising a plurality of light sensing detectors is arranged on one side of the opposite substrate facing the array substrate, and the detection light source generator capable of emitting invisible light is arranged on one side of the opposite substrate departing from the array substrate, so that the detection light source generator is close to the fingerprint contact surface and the optical path between the detection light source generator and the fingerprint identification layer is short, and thus, the energy loss in the process of transmitting the invisible light to the light sensing detectors after being reflected by fingers is small, and the full-screen display is realized, and meanwhile, the fingerprint identification definition and the sensitivity are high.
Drawings
FIG. 1 is a schematic view of an improved LCD panel according to an embodiment of the present invention;
FIG. 2 is a second schematic view of an improved LCD panel according to the second embodiment of the present invention;
fig. 3 is a third schematic structural diagram of a liquid crystal display panel according to an embodiment of the invention;
fig. 4 is a fourth schematic structural diagram of a liquid crystal display panel according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. "inner", "outer", "upper", "lower", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
Among the correlation technique, with the fingerprint identification module as for TFT-LCD below realization full screen display's scheme, at the in-process that carries out fingerprint identification, be shaded and need reach the finger through display module assembly, behind the display module assembly again behind the finger reflection, transmit fingerprint identification module assembly discernment fingerprint information. Thus, the difficulty of fingerprint identification is high.
In view of the above problems in the related art, embodiments of the present invention provide a liquid crystal display panel and a display device.
Hereinafter, specific embodiments of a liquid crystal display panel and a display device according to embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The thicknesses and shapes of the various film layers in the drawings are not to be considered true proportions, but are merely intended to illustrate the present invention.
An embodiment of the present invention provides a liquid crystal display panel, as shown in fig. 1 to 4, including: an opposing substrate 001 and an array substrate 002 disposed opposite to each other; wherein the content of the first and second substances,
be provided with fingerprint identification layer 003 in the one side that subtend base plate 001 faces array substrate 002, fingerprint identification layer 003 includes: a plurality of photo-sensing detectors (e.g., PN structure or PIN structure);
a detection light source generator 004 is provided on a side of the counter substrate 001 facing away from the array substrate 002, and the detection light source generator 004 is configured to emit invisible light (e.g., ultraviolet light or infrared light).
In the liquid crystal display panel provided by the embodiment of the invention, the fingerprint identification layer 003 including the plurality of photo-sensing detectors is arranged on the side of the opposite substrate 001 facing the array substrate 002, and the detection light source generator 004 capable of emitting invisible light is arranged on the side of the opposite substrate 001 away from the array substrate 002, so that the detection light source generator 004 is close to the fingerprint contact surface and has a short optical path with the fingerprint identification layer 003, and thus, the energy loss in the process of transmitting the invisible light to the photo-sensing detectors after being reflected by a finger is small, and the full-screen display is realized and simultaneously the fingerprint identification definition and the sensitivity are high.
In the liquid crystal display panel according to the embodiment of the invention, the fingerprint recognition film layer 003 facing the array substrate 002 may be disposed on any film layer of the counter substrate 001. Alternatively, in order to improve the clarity and sensitivity of fingerprint recognition, as shown in fig. 1 and 2, the opposite substrate 001 includes: a substrate base plate 101 and a black matrix 102 on the substrate base plate 101;
the fingerprint identification layer 003 is positioned between the substrate base plate 101 and the black matrix 102;
and the orthographic projection of each photo-sensing detector on the substrate base plate 101 can be arranged to be positioned in the orthographic projection of the black matrix 102 on the substrate base plate 101. The arrangement is such that the light emitted from the backlight does not pass through the fingerprint recognition layer 003 at the time of normal display, thereby preventing the moire phenomenon generated in the case where the light emitted from the backlight passes through the fingerprint recognition layer 003 and the detection light source generator 004 in this order.
Alternatively, in the above-described liquid crystal display panel provided by the embodiment of the present invention, as shown in fig. 1 and fig. 2, the detection light source generator 004 is a detection light source layer provided on the entire surface of the substrate base plate 101 on the side away from the black matrix 102.
Optionally, in the liquid crystal display panel provided in the embodiment of the invention, the detection light source layer may be made of an organic photoluminescent material doped with yttrium oxide, and the organic photoluminescent material doped with yttrium oxide may continuously radiate invisible light after absorbing a small portion of energy of ambient light or backlight, so that an additional functional circuit of the detection light source layer is not required to be designed. In addition, in order to improve the detection sensitivity and the definition of the optical sensing detector, the yttrium oxide doped organic photoluminescence material with the emission wavelength matched with the detection wavelength of the optical sensing detector is preferably selected. In addition, in the implementation, the material of the detection light source layer may also be other transparent fluorescent materials known to those skilled in the art that can emit invisible light, or a transparent substance doped with the fluorescent material that can emit invisible light, which is not limited herein.
Optionally, in the liquid crystal display panel provided in the embodiment of the present invention, as shown in fig. 1, the liquid crystal display panel may further include: and the shielding electrode layer 005 is positioned on the side of the detection light source layer, which is far away from the substrate base plate 101, and the shielding electrode layer 005 can shield the interference of an external electric field to the liquid crystal display. However, the yttria-doped organic photoluminescent material can be conductive, and therefore, in the case that the detection light source layer is made of the yttria-doped organic photoluminescent material, the insulating layer 006 needs to be disposed between the shielding electrode layer 005 and the detection light source layer.
Optionally, in the liquid crystal display panel provided in the embodiment of the present invention, a material of the detection light source layer may also be an organic electroluminescent material. In addition, in order to improve the detection sensitivity and the definition of the light sensing detector, an organic electroluminescent material with the emission wavelength matched with the detection wavelength of the light sensing detector is preferably selected.
Optionally, as shown in fig. 2, the liquid crystal display panel provided in the embodiment of the present invention may further include: the shielding electrode layer 005 is located on the side of the detection light source layer away from the substrate base plate 101, and the shielding electrode layer 005 can shield interference of an external electric field to the liquid crystal display. Under the condition that the detection light source layer is made of the organic electroluminescent material, in order to realize the light and thin design, the shielding electrode layer 005 can be etched to form a functional circuit for controlling the organic electroluminescent material to emit invisible light.
It is understood that the shielding electrode layer 005 is made of a transparent conductive material such as ITO so as not to affect the display function.
Optionally, as shown in fig. 3 and fig. 4, the liquid crystal display panel provided in the embodiment of the present invention may further include: the protective cover plate 007 is positioned on one side of the opposite substrate 001, which is far away from the array substrate 002;
The detection light source generator 004 is a light emitting module fixed to a frame region of the protective cover plate 007 facing the opposite substrate 001.
It is noted that, in fig. 1 and 2, in the case that the detection light source generator 004 is a detection light source layer disposed on the whole side of the substrate base plate 101 facing away from the black matrix 102, in order to realize full-screen fingerprint identification, the plurality of light sensing detectors included in the fingerprint identification layer 003 are preferably uniformly distributed on the substrate base plate 101. In fig. 3 and 4, in the case that the detection light source generator 004 is a light emitting module fixed in the border region of the side of the protective cover plate 007 facing the opposite substrate 001, since the invisible light emitted by the light emitting module is only located in the border region and the display region adjacent to the border region, and only the fingerprint identification of the fixed region can be realized, the plurality of photo-sensing detectors included in the fingerprint identification layer 003 can be uniformly distributed on the substrate 101 (as shown in fig. 3) or distributed only in the display region adjacent to the border region on the substrate (as shown in fig. 4).
Optionally, in the liquid crystal display panel provided in the embodiment of the present invention, the liquid crystal display panel may further include: and a chip (not shown) located in the frame area of the liquid crystal display panel, wherein the chip is configured to identify fingerprint information according to the electrical signal of each light sensing detector.
Optionally, in the liquid crystal display panel provided in the embodiment of the present invention, as shown in fig. 1 to fig. 4, the liquid crystal display panel may further include: a color resist layer (specifically shown in the figure, the color resist layer is composed of a red color resist R, a green color resist G, and a blue color resist G) located in a limited region of the black matrix 102, a flat layer 103 located on a side of the color resist layer facing the array substrate 002, a liquid crystal layer 008 located between the counter substrate 001 and the array substrate 002, a spacer 009 for maintaining a distance between the counter substrate 001 and the array substrate 002, a first polarizer 010 located between the shielding electrode layer 005 and the protective cover plate 007, and a second polarizer 011 located on a side of the array substrate 002 away from the liquid crystal layer 008; wherein, the transmission axis of the first polarizer 010 is perpendicular to the transmission axis of the second polarizer 011. In addition, the liquid crystal display panel provided in the embodiment of the present invention may further include other components known in the related art, which are not described herein again.
The liquid crystal display panel provided by the embodiment of the invention can be a twisted nematic liquid crystal display panel, an advanced super-dimensional field switching liquid crystal display panel, a high aperture ratio-advanced super-dimensional field switching liquid crystal display panel, or an in-plane switching liquid crystal display panel, which is not limited herein.
Based on the same inventive concept, an embodiment of the present invention further provides a display device, including: the backlight source and the liquid crystal display panel are positioned on the light-emitting side of the backlight source; the liquid crystal display panel is the liquid crystal display panel provided by the embodiment of the invention. The display device may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, an intelligent watch, a fitness wrist strap, and a personal digital assistant. Since the principle of the display device to solve the problem is the same as that of the liquid crystal display panel, the implementation of the display device can be referred to the above embodiment of the liquid crystal display panel, and repeated descriptions are omitted.
Optionally, in the display device provided in the embodiment of the present invention, the backlight may be a side-type backlight or a direct-type backlight, which is not limited herein.
The embodiment of the invention provides a liquid crystal display panel and a display device, comprising: an array substrate and an opposite substrate which are oppositely arranged; wherein, be provided with the fingerprint identification layer in one side of subtending base plate towards array substrate, the fingerprint identification layer includes: a plurality of light sensing detectors; a detection light source generator is arranged on one side of the opposite substrate, which faces away from the array substrate, and the detection light source generator is configured to emit invisible light. In the invention, the fingerprint identification layer comprising a plurality of light sensing detectors is arranged on one side of the opposite substrate facing the array substrate, and the detection light source generator capable of emitting invisible light is arranged on one side of the opposite substrate departing from the array substrate, so that the detection light source generator is close to the fingerprint contact surface and the optical path between the detection light source generator and the fingerprint identification layer is short, and thus, the energy loss in the process of transmitting the invisible light to the light sensing detectors after being reflected by fingers is small, and the full-screen display is realized, and meanwhile, the fingerprint identification definition and the sensitivity are high.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. A liquid crystal display panel, comprising: an array substrate and an opposite substrate which are oppositely arranged; wherein, the first and the second end of the pipe are connected with each other,
a fingerprint identification layer is arranged on one side of the opposite substrate facing the array substrate, and comprises: a plurality of light sensing detectors;
a detection light source generator is arranged on one side of the opposite substrate, which faces away from the array substrate, and the detection light source generator is configured to emit invisible light;
the detection light source generator is a detection light source layer arranged on the whole surface of one side of the opposite substrate, which is far away from the array substrate;
the material of the detection light source layer is an organic photoluminescence material or an organic electroluminescence material doped with yttrium oxide.
2. The liquid crystal display panel according to claim 1, wherein the counter substrate includes: the black matrix display device comprises a substrate base plate and a black matrix positioned on the substrate base plate;
The fingerprint identification layer is positioned between the substrate base plate and the black matrix;
and the orthographic projection of each light sensing detector on the substrate base plate is positioned in the orthographic projection of the black matrix on the substrate base plate.
3. The liquid crystal display panel according to claim 2, wherein the detection light source generator is a detection light source layer provided over an entire surface of a side of the substrate facing away from the black matrix.
4. The liquid crystal display panel of claim 3, wherein when the detection light source layer is made of yttrium oxide-doped organic photoluminescent material, the liquid crystal display panel further comprises: the substrate comprises a substrate base plate, a detection light source layer and a shielding electrode layer, wherein the shielding electrode layer is positioned on one side, away from the substrate base plate, of the detection light source layer, and an insulating layer is positioned between the shielding electrode layer and the detection light source layer.
5. The liquid crystal display panel of claim 3, wherein when the detection light source layer is made of an organic electroluminescent material, the liquid crystal display panel further comprises: and the shielding electrode layer is positioned on one side of the detection light source layer, which faces away from the substrate base plate, and is configured to control the organic electroluminescent material to emit invisible light.
6. The liquid crystal display panel according to claim 1, further comprising: the protective cover plate is positioned on one side, away from the array substrate, of the opposite substrate;
The detection light source generator is a light emitting module fixed in a frame area of one side of the protection cover plate facing the opposite substrate.
7. The liquid crystal display panel according to any one of claims 1 to 6, further comprising: the chip is positioned in the frame area of the liquid crystal display panel and is configured to identify fingerprint information according to the electric signals of the light sensing detectors.
8. A display device, comprising: the backlight source and the liquid crystal display panel are positioned on the light emitting side of the backlight source; wherein, the first and the second end of the pipe are connected with each other,
the liquid crystal display panel according to any one of claims 1 to 7.
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| CN201910937258.7A CN110647861B (en) | 2019-09-29 | 2019-09-29 | Liquid crystal display panel and display device |
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| CN105184248A (en) * | 2015-08-28 | 2015-12-23 | 京东方科技集团股份有限公司 | Fingerprint identification device and fingerprint identification system |
| CN109521590A (en) * | 2018-12-14 | 2019-03-26 | 厦门天马微电子有限公司 | The production method of display device and display device |
| CN110174794A (en) * | 2019-06-28 | 2019-08-27 | 京东方科技集团股份有限公司 | Display device, liquid crystal display panel and its driving method |
| CN110208982A (en) * | 2019-04-24 | 2019-09-06 | 华为技术有限公司 | Liquid crystal display device |
| CN110287920A (en) * | 2019-06-29 | 2019-09-27 | 厦门天马微电子有限公司 | A kind of display panel and display device |
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| KR20150053635A (en) * | 2013-11-08 | 2015-05-18 | 삼성디스플레이 주식회사 | Flat panel display apparatus |
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| CN105184248A (en) * | 2015-08-28 | 2015-12-23 | 京东方科技集团股份有限公司 | Fingerprint identification device and fingerprint identification system |
| CN109521590A (en) * | 2018-12-14 | 2019-03-26 | 厦门天马微电子有限公司 | The production method of display device and display device |
| CN110208982A (en) * | 2019-04-24 | 2019-09-06 | 华为技术有限公司 | Liquid crystal display device |
| CN110174794A (en) * | 2019-06-28 | 2019-08-27 | 京东方科技集团股份有限公司 | Display device, liquid crystal display panel and its driving method |
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