CN115000122A - Display panel, display device and terminal - Google Patents

Display panel, display device and terminal Download PDF

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Publication number
CN115000122A
CN115000122A CN202111175092.3A CN202111175092A CN115000122A CN 115000122 A CN115000122 A CN 115000122A CN 202111175092 A CN202111175092 A CN 202111175092A CN 115000122 A CN115000122 A CN 115000122A
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sub
pixel
pixels
infrared light
centers
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CN202111175092.3A
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Chinese (zh)
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田正
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Honor Device Co Ltd
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Honor Device Co Ltd
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Priority to CN202111175092.3A priority Critical patent/CN115000122A/en
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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • H10K59/351—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels comprising more than three subpixels, e.g. red-green-blue-white [RGBW]
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • H10K59/353—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels characterised by the geometrical arrangement of the RGB subpixels
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
    • H10K59/65—OLEDs integrated with inorganic image sensors

Abstract

The application provides a display panel, wherein a pixel array of the display panel comprises a plurality of sub-pixels, the plurality of sub-pixels comprise a first sub-pixel, a second sub-pixel, a third sub-pixel and an infrared light-emitting sub-pixel, and at least one infrared light-emitting sub-pixel is arranged on a connecting line of the centers of two adjacent different-color sub-pixels; the infrared light-emitting sub-pixel comprises a light-emitting element and a photo-induced infrared light-emitting material positioned on the light-emitting element, and the photo-induced infrared light-emitting material emits infrared light under the irradiation of the light-emitting element. The application also provides a display device comprising the display panel and a terminal. This application regards as infrared emission source with the infrared luminescence sub-pixel that sets up on display panel, and it sets up between two adjacent heterochrosis visible photon pixels, does not influence the demonstration of colour on the one hand, and on the other hand can increase infrared luminous area and efficiency, improves face identification's accuracy.

Description

Display panel, display device and terminal
Technical Field
The application relates to the field of terminals, in particular to a display panel, a display device and a terminal.
Background
With the development of the technology, the functions of electronic devices such as smart phones and tablet computers are increasingly enriched, and the application of the functions such as fingerprint identification, iris identification and face identification is more popular. The face recognition usually adopts an infrared light detection technology, namely, the display device projects an infrared point light source to the face of the user to collect the face image and the depth of field information of the user to form a digital face model, and the collected model is compared with a face model stored in the mobile phone to judge whether the mobile phone is unlocked.
In order to implement a full-screen, a face recognition assembly consisting of a dot-matrix projector, which employs a VCSEL (vertical cavity surface emitting laser) array, an infrared lens, and a flood sensing element is typically disposed below the display screen. The VCSEL emits infrared light dot matrixes which penetrate through the display screen to irradiate the face, reflected light penetrates through the display screen again to reach the infrared lens, and infrared images of the infrared lens are captured, so that facial recognition is achieved.
Disclosure of Invention
The application provides a display panel, display device and terminal has solved the lower problem of infrared light utilization efficiency.
In order to achieve the purpose, the technical scheme is as follows:
a display device includes a display panel and an optical device disposed at one side of the display panel, the optical device including an infrared lens;
the pixel array of the display panel comprises a plurality of sub-pixels, wherein the plurality of sub-pixels comprise a first sub-pixel, a second sub-pixel, a third sub-pixel and an infrared light-emitting sub-pixel, the colors of the first sub-pixel, the second sub-pixel and the third sub-pixel are different, and at least one infrared light-emitting sub-pixel is arranged on a connecting line of the centers of two adjacent different-color sub-pixels;
the infrared light-emitting sub-pixel comprises a light-emitting element and a photo-induced infrared light-emitting material positioned on the light-emitting element, and the photo-induced infrared light-emitting material emits infrared light under the irradiation of the light-emitting element.
The display device provided by the invention has the advantages that the plurality of infrared light-emitting sub-pixels are arranged on the display panel, each infrared light-emitting sub-pixel comprises a light-emitting element and a photoluminescence material positioned on the light-emitting element, the photoluminescence material can emit infrared light under the irradiation of the light-emitting element, the infrared light can be used for irradiating human faces, irises or fingerprints, and reflected light is captured by the infrared lens, so that the face recognition, iris recognition or fingerprint recognition is realized. On one hand, the infrared light emitting sub-pixels are arranged on the display panel, when infrared light is emitted to irradiate the face, the infrared light does not need to penetrate through the display panel, so that the efficiency attenuation of the infrared light is avoided, the utilization efficiency of the infrared light is improved, and the accuracy of face recognition is improved; on the other hand, the infrared light-emitting sub-pixel comprises a light-emitting element and a photo-induced infrared light-emitting material positioned on the light-emitting element, and the difference from other sub-pixels in the preparation process is only that the photo-induced infrared light-emitting material is added, so that the difficulty of the preparation process is not increased additionally.
In a specific embodiment, the infrared light-emitting sub-pixel is disposed between two adjacent different-color visible sub-pixels, and specifically, the center of the infrared light-emitting sub-pixel is located on a connecting line of the centers of the two adjacent different-color visible sub-pixels, so that on one hand, color display is not affected, on the other hand, the infrared light-emitting area is increased, and the accuracy of face recognition is improved.
In one possible implementation, the pixel array includes a plurality of sub-pixels including a first sub-pixel, a second sub-pixel, a third sub-pixel, and an infrared light emitting sub-pixel; the first sub-pixels and the third sub-pixels are alternately arranged in a row direction to form a plurality of rows of first pixel rows, and the first sub-pixels and the third sub-pixels located in the same column in the plurality of rows of first pixel rows are alternately arranged; the second sub-pixels are arranged side by side in the row direction to form a plurality of rows of second pixels, and the second sub-pixels are arranged in a manner of being staggered with the first sub-pixels and the third sub-pixels of the adjacent rows; the centers of two first sub-pixels and two third sub-pixels which are arranged in an array form a line in sequence to form a first virtual quadrangle, and one second sub-pixel is arranged in each first virtual quadrangle; at least one connecting line of the first virtual quadrangle is provided with an infrared light-emitting sub-pixel, the connecting line comprises four sides of the first virtual quadrangle, a connecting line formed by the centers of two third sub-pixels on the corners of the first virtual quadrangle and the center of a second sub-pixel in the first virtual quadrangle is formed by the centers of two third sub-pixels on the corners of the first virtual quadrangle.
In another possible implementation manner, the pixel array comprises a plurality of rows of first pixel rows, second pixel rows and third pixel rows which are alternately arranged, wherein the first pixel rows are formed by arranging first sub-pixels side by side, the second pixel rows are formed by arranging second sub-pixels side by side, and the third pixel rows are formed by arranging third sub-pixels side by side; in adjacent first pixel rows, the first sub-pixels are arranged in a staggered manner in the column direction, in adjacent second pixel rows, the second sub-pixels are arranged in a staggered manner in the column direction, and in adjacent third pixel rows, the third sub-pixels are arranged in a staggered manner in the column direction; meanwhile, the second sub-pixels in the second pixel row are respectively arranged in a staggered manner with the first sub-pixels in the first pixel row and the third sub-pixels in the third pixel row adjacent to the second sub-pixels;
the centers of two first sub-pixels and two third sub-pixels which are arranged in an array form a line in sequence to form second virtual quadrangles, and one second sub-pixel is arranged in each second virtual quadrangle; at least one connecting line of the second virtual quadrangle is provided with an infrared light-emitting sub-pixel, the connecting line comprises two edges of which two ends are different color sub-pixels in the second virtual quadrangle, the centers of two third sub-pixels on the corners of the second virtual quadrangle are respectively connected with the center of a second sub-pixel in the second virtual quadrangle, and the centers of two third sub-pixels on the corners of the second virtual quadrangle are respectively connected with the center of a second sub-pixel in the second virtual quadrangle;
or the centers of two second sub-pixels and two first sub-pixels which are arranged in an array are sequentially connected to form a second virtual quadrangle, and a third sub-pixel is arranged in each second virtual quadrangle; at least one connecting line of the second virtual quadrangle is provided with an infrared light-emitting sub-pixel, the connecting line comprises two edges of which two ends are different color sub-pixels in the second virtual quadrangle, the centers of two second sub-pixels on the corners of the second virtual quadrangle are respectively connected with a connecting line formed by the centers of third sub-pixels in the second virtual quadrangle, and the centers of two first sub-pixels on the corners of the second virtual quadrangle are respectively connected with the centers of third sub-pixels in the second virtual quadrangle;
or the centers of two third sub-pixels and the centers of two second sub-pixels which are arranged in an array are sequentially connected to form second virtual quadrangles, and a first sub-pixel is arranged in each second virtual quadrangle; at least one connecting line of the second virtual quadrangle is provided with an infrared light-emitting sub-pixel, the connecting line comprises two edges of which two ends are different color sub-pixels in the second virtual quadrangle, the centers of two second sub-pixels on the corners of the second virtual quadrangle are respectively connected with the center of a first sub-pixel in the second virtual quadrangle, and the centers of two second sub-pixels on the corners of the second virtual quadrangle are respectively connected with the center of a first sub-pixel in the second virtual quadrangle.
In another possible implementation manner, the pixel array comprises a plurality of pixel rows, the pixel rows are formed by alternately arranging first sub-pixels, second sub-pixels and third sub-pixels, and sub-pixels in the same column in the plurality of pixel rows are sub-pixels with the same color;
the infrared light-emitting sub-pixels are arranged in at least one of the following modes:
(1) the centers of the two first sub-pixels and the centers of the two second sub-pixels which are distributed in a display manner are sequentially connected to form a third virtual quadrangle; at least one connecting line of the third virtual quadrangle is provided with an infrared light-emitting sub-pixel, and the connecting line comprises two edges of the third virtual quadrangle, two ends of which are different color sub-pixels, and two diagonal lines of which two ends are different color sub-pixels;
(2) the centers of the two second sub-pixels and the centers of the two third sub-pixels which are distributed in an array form a line in sequence to form a fourth virtual quadrangle; at least one connecting line of the fourth virtual quadrangle is provided with an infrared light-emitting sub-pixel, and the connecting line comprises two edges of the fourth virtual quadrangle, two ends of which are different color sub-pixels, and two diagonal lines of which two ends are different color sub-pixels;
(3) the centers of the two third sub-pixels and the centers of the two first sub-pixels which are distributed in an array form a line in sequence to form a fifth virtual quadrangle; and the connecting line comprises two edges of the heterochromatic sub-pixel at two ends in the fifth virtual quadrangle, and two diagonal lines of the heterochromatic sub-pixel at two ends of the fifth virtual quadrangle.
On the other hand, the application also provides a terminal which comprises the display device in the technical scheme. The terminal can project infrared light to a face through infrared light-emitting photon pixels and draw a dot matrix face spectrum; the infrared lens reads the dot matrix facial spectrum, captures an infrared image of the dot matrix facial spectrum to form a digital facial model, compares the collected model with the facial model stored in the terminal, and judges whether to unlock or not, so that facial recognition is realized.
It should be appreciated that the description of technical features, solutions, benefits, or similar language in this application does not imply that all of the features and advantages may be realized in any single embodiment. Rather, it is to be understood that the description of a feature or advantage is intended to include the specific features, aspects or advantages in at least one embodiment. Therefore, the descriptions of technical features, technical solutions or advantages in the present specification do not necessarily refer to the same embodiment. Furthermore, the technical features, technical solutions and advantages described in the present embodiments may also be combined in any suitable manner. One skilled in the relevant art will recognize that an embodiment may be practiced without one or more of the specific features, aspects, or advantages of a particular embodiment. In other instances, additional features and advantages may be recognized in certain embodiments that may not be present in all embodiments.
Drawings
Fig. 1 is a schematic diagram of a smartphone for facial recognition;
FIG. 2 is a schematic diagram of the light-emitting principle of an infrared light-emitting sub-pixel according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a first exemplary planar structure of a display panel according to a first embodiment of the present application;
fig. 4 is a schematic diagram of a second exemplary planar structure of a display panel provided in the first embodiment of the present application;
fig. 5 is a schematic view of a third exemplary planar structure of a display panel provided in the first embodiment of the present application;
fig. 6 is a schematic diagram of a fourth exemplary planar structure of a display panel provided in the first embodiment of the present application;
fig. 7 is a schematic diagram of a first exemplary planar structure of a display panel according to a second embodiment of the present application;
fig. 8 is a schematic view of a second exemplary planar structure of a display panel provided in a second embodiment of the present application;
fig. 9 is a schematic diagram of a third exemplary planar structure of a display panel provided in the second embodiment of the present application;
fig. 10 is a schematic plan view illustrating a display panel according to a third embodiment of the present application;
fig. 11 is a schematic diagram of a film structure of an exemplary pixel array.
Detailed Description
In the embodiments of the present application, words such as "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
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 application belongs. The use of "first," "second," and similar self-healing terms in this application do not denote any order, quantity, or importance, but rather the terms "first," "second," and similar terms are used to distinguish one element from another. Likewise, the use of the terms "a," "an," or "the" and similar referents do not denote a limitation of quantity, but rather denote the presence of at least one. 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. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", 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.
It can be understood by those skilled in the art that the reference to the row direction and the column direction in the embodiments of the present application only represents two different directions, and the two directions are not limited to being perpendicular to each other, and the drawings of the embodiments of the present application only illustrate that the row direction and the column direction are perpendicular, and do not limit the embodiments of the present application.
In the embodiments of the present application, the pixel array refers to an arrangement structure of light emitting devices of different colors in a display substrate, and does not limit an arrangement structure of a pixel circuit for driving each light emitting device. Accordingly, it should be understood that the sub-pixels in the embodiments of the present application refer to a light emitting device structure, and the first sub-pixel, the second sub-pixel, and the third sub-pixel represent sub-pixels of three different colors.
The present application is described by taking a smart phone as an example, and it should be understood that any other device having communication and storage functions and a display function, such as a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a tablet computer, a Personal Digital Assistant (PAD), a notebook computer, a Digital camera, an electronic book reader, a portable multimedia player, a handheld device having a wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, and a 5G terminal device, are all within the scope of the terminal of the present application.
Referring to fig. 1, fig. 1 is a schematic diagram of a smartphone for face recognition. The face recognition component comprises a dot matrix projector and an infrared lens, wherein the dot matrix projector is used for projecting more than 30,000 invisible infrared points to the face to draw a dot matrix face spectrum; the infrared lens is used for reading the dot matrix pattern and capturing an infrared image of the dot matrix pattern. However, the dot matrix projector is arranged below the screen, the infrared dot matrix penetrates through the display screen to irradiate on the face, the reflected light penetrates through the display screen again to reach the infrared lens, and the utilization rate of the infrared light is low. According to the method and the device, the function of the dot matrix projector is realized by integrating the infrared light-emitting pixels on the screen, so that the utilization efficiency of infrared light is improved, and the accuracy of face recognition is improved.
In one embodiment of the application, a smart phone as a terminal at least comprises a display device, wherein the display device at least comprises an OLED display panel and an optical device arranged on one side of the display panel, and the optical device at least comprises an infrared lens.
In one embodiment, the OLED display panel includes at least an infrared light-emitting sub-pixel, where the infrared light-emitting sub-pixel includes a light-emitting element and a photo-infrared light-emitting material on the light-emitting element, and the photo-infrared light-emitting material can emit infrared light under the irradiation of the light-emitting element, and the infrared light can be used to irradiate a human face, an iris or a fingerprint, and the reflected light is captured by an infrared lens, so as to realize face recognition, iris recognition or fingerprint recognition.
Referring to fig. 2, fig. 2 is a schematic view illustrating a light emitting principle of an infrared light emitting sub-pixel according to an embodiment of the present invention. The infrared light emitting sub-pixel comprises a light emitting element 100 and a photo-induced infrared light emitting material 200 positioned on the light emitting element 100, wherein the photo-induced infrared light emitting material 200 can emit infrared light under the irradiation of the light emitting element 100.
In one embodiment, the light emitting element 100 is a visible light OLED, such as a red OLED, a green OLED, or a blue OLED. Correspondingly, the photo-induced infrared luminescent material 200 may be an infrared luminescent material excited by red light, an infrared luminescent material excited by green light, an infrared luminescent material excited by blue light, or the like, and may be an organic luminescent material or an inorganic luminescent material, and the emitted infrared light may be far infrared light, mid-infrared light, or near infrared light, which is not limited in this application. In one embodiment, the light emitting device 100 is a green OLED, and the photo-infrared light emitting material 200 is an infrared Quantum Dot Color Filter (QDCF), which has high photo-luminescence efficiency and can ensure the emission power of infrared light, thereby improving the accuracy of facial recognition, iris recognition or fingerprint recognition. In one embodiment, an infrared Quantum Dot Color Filter (QDCF) is formed from nanoparticles of group II-VI or III-V elements dispersed in a photoresist, including but not limited to CdSe/CdS, PbSe, PbS, InAs, and the like. In one embodiment, the nanoparticles have a particle size of 1 to 50 nm. In one embodiment, the nanoparticles have a particle size of 2 to 15 nm.
In an embodiment of the present application, the infrared light emitting sub-pixel is disposed between two adjacent different color visible sub-pixels, and specifically, the center of the infrared light emitting sub-pixel is located on a connection line of the centers of the two adjacent different color visible sub-pixels, so that on one hand, color display is not affected, on the other hand, the area and efficiency of infrared light emission are increased, and accuracy of face recognition is improved.
In one embodiment of the present application, the infrared lens is used for reading a dot matrix area spectrum formed by infrared light emitted by the infrared light emitting sub-pixels and capturing an infrared image of the dot matrix area spectrum. In one embodiment, the optical device may further include a flood sensing element for projecting invisible infrared light in a dark environment to assist the face recognition component in recognizing facial information. The present application is not limited to any particular location or manner of placement. In one embodiment, the optical device further includes a front camera, an ambient light sensor, and the like, which are not limited herein.
Referring to fig. 3, fig. 3 is a schematic view of a first exemplary planar structure of a display panel according to a first embodiment of the present application. The display panel 10 is an OLED display panel, and the pixel array includes a plurality of first pixel rows 21 and a plurality of second pixel rows 22, and the first pixel rows 21 and the second pixel rows 22 are alternately arranged. The first pixel row is formed by red subpixels 201 and blue subpixels 203 alternately arranged, and the red subpixels 201 and the blue subpixels 203 located in the same column in the plurality of rows of the first pixel row are also alternately arranged. The second pixel row is formed by a plurality of green sub-pixels 202 arranged side by side, and the green sub-pixels 202 are arranged in a staggered manner with the red sub-pixels 201 and the blue sub-pixels 203 in adjacent rows.
The centers of two red subpixels 201 and two blue subpixels 203 arranged in an array are sequentially connected to form a first virtual quadrangle 23, and one green subpixel 202 is arranged in each first virtual quadrangle 23. At this time, of the 2 red sub-pixels, the 2 blue sub-pixels and the green sub-pixels located in the first virtual quadrangle 23, at least one infrared sub-pixel 204 is disposed on a connection line of at least one adjacent heterochromatic sub-pixel. That is, two ends of each side of each first virtual quadrangle 23 are adjacent heterochromatic sub-pixels, so that each side of the first virtual quadrangle 23 can be provided with an infrared sub-pixel 204; the red sub-pixel 201 or the blue sub-pixel 203 at the corner of each first virtual quadrangle 23 and the green sub-pixel 202 inside it are adjacent different color sub-pixels, and the infrared sub-pixel 204 can be disposed on the connection line. In one embodiment, the center of the infrared sub-pixel 204 is located at the midpoint of the line connecting adjacent different color sub-pixels.
It should be noted that, in the embodiment of the present application, the shapes of the red sub-pixel, the blue sub-pixel, the green sub-pixel, and the infrared light emitting sub-pixel each include a polygon, including but not limited to a rounded polygon, a convex polygon, or a concave polygon. The center of the sub-pixel may be the geometric center of the sub-pixel, or the intersection of perpendicular bisectors of the sides of the sub-pixel, or a point of the sub-pixel having approximately equal vertical distances to the sides, although the center of the sub-pixel may be allowed to have some error. For example, the center of the sub-pixel is centered at any point within a radius of 3 μm from the geometric center of the sub-pixel.
It should be understood that the pixel rows and the columns formed by the sub-pixels in the embodiments of the present application are not limited to the case where the centers of the sub-pixels in the same row or the same column form a straight line, but also includes the case where any point of the sub-pixels in the same row or the same column forms a straight line.
As shown in fig. 3, in the first pixel row 21, the centers of the red sub-pixel 201 and the blue sub-pixel 203 are not in a straight line, and the upper portion of the red sub-pixel 201 and the lower portion of the blue sub-pixel 203 are in a straight line, i.e., the center of the blue sub-pixel is above the red sub-pixel; in the second pixel row 22, the centers of the green sub-pixels 202 are on a straight line, so that the first virtual quadrangle 23 formed by sequentially connecting the centers of the two red sub-pixels 201 and the two blue sub-pixels 203 arranged in an array is a trapezoid, and the longer bottom side of each trapezoid is provided with the infrared sub-pixel 204. The number of the infrared sub-pixels 204 may be one, or may be multiple, for example, two, three or more, but the display effect of the virtual pixel unit formed by the adjacent red, blue and green sub-pixels is affected by the excessive number of the infrared sub-pixels 204, and therefore, it is preferable that one infrared sub-pixel 204 is disposed on the longer bottom side of each trapezoid. The infrared sub-pixel 204 may be located at any position on the bottom side, preferably with its center at the midpoint of the bottom side. It is understood that in other embodiments, one or more infrared sub-pixels 204 may be disposed on the shorter bottom side of the trapezoid separately or simultaneously, and in order to ensure the display effect of the virtual pixel unit, one infrared sub-pixel 204 is disposed on each bottom side of the trapezoid, and the center of each infrared sub-pixel 204 is located at the midpoint of the bottom side where it is located.
In other embodiments, as shown in fig. 4, fig. 4 is a schematic view of a second exemplary planar structure of the display panel provided in the first embodiment of the present application, two infrared sub-pixels 204 are respectively disposed on two waists of a trapezoid formed by sequentially connecting centers of two red sub-pixels 201 and two blue sub-pixels 203 arranged in an array, and the center of the infrared sub-pixel 204 is located at a midpoint of the waist of the trapezoid. It is understood that in other embodiments, only one infrared subpixel 204 may be disposed on any one of the waists of the trapezoid.
In other embodiments, as shown in fig. 5, fig. 5 is a schematic view of a third exemplary planar structure of the display panel provided in the first embodiment of the present application, and two infrared sub-pixels 204 are respectively disposed on two waists and longer bottom edges of a trapezoid formed by sequentially connecting centers of two red sub-pixels 201 and two blue sub-pixels 203 arranged in an array. It will be appreciated that in other embodiments, one infrared subpixel 204 may be disposed on the shorter base of the trapezoid at the same time.
In an embodiment, as shown in fig. 6, fig. 6 is a schematic diagram of a fourth exemplary planar structure of a display panel provided in the first embodiment of the present application, in which centers of red subpixels 201 and blue subpixels 203 in a first pixel row 21 are on a straight line, and centers of green subpixels 202 in a second pixel row 22 are on a straight line, so that a first virtual quadrangle 23 formed by sequentially connecting centers of two red subpixels 201 and two blue subpixels 203 arranged in an array is a square, and an infrared subpixel 204 is disposed on each side of each square. The number of the infrared sub-pixels 204 on each side may be one, or may be multiple, for example, two, three or more, but the excessive number of the infrared sub-pixels 204 may affect the display effect of the virtual pixel unit formed by the adjacent red sub-pixels, blue sub-pixels and green sub-pixels, and therefore, it is preferable to provide one infrared sub-pixel 204 on each side. The infrared sub-pixel 204 may be placed anywhere on the edge, preferably with its center at the midpoint of the edge. It is understood that in other embodiments, one infrared subpixel 204 may be disposed on any one or two or three sides of the virtual square.
In one embodiment, the green sub-pixel, the red sub-pixel, the blue sub-pixel and the infrared light-emitting sub-pixel have a diamond shape, and the infrared light-emitting sub-pixel may have the same shape as the other sub-pixels or different shapes, for example, the infrared light-emitting sub-pixel may have a diamond shape, a circular shape or other polygonal shapes. Referring to fig. 3, 4, 5 or 6, in one embodiment, the green, red, blue and infrared emitting sub-pixels are each diamond shaped. In one embodiment, the rhombus can be provided with chamfers, namely a round rhombus structure, so that the manufacturing is convenient. In other embodiments, the shapes of the green sub-pixel, the red sub-pixel, the blue sub-pixel, and the infrared light emitting sub-pixel may also be other polygons, such as a rectangle or a circle, and the shapes of the infrared light emitting sub-pixel and other sub-pixels may be the same or different, which is not described herein again.
In the area setting of each sub-pixel, one way is: the area of the blue sub-pixel is larger than that of the red sub-pixel, the area of the red sub-pixel is larger than that of the green sub-pixel, and the area of the green sub-pixel is larger than or equal to that of the infrared light emitting sub-pixel. Because human eyes are sensitive to green light and the efficiency of the green luminescent material is high, the area of the green sub-pixel can be set to be smaller; meanwhile, compared with a red light-emitting material, a blue light-emitting material has low light-emitting efficiency and short service life, so that the area of a blue sub-pixel is larger than that of a red sub-pixel and a green sub-pixel. The infrared light emitting sub-pixel area is set to be minimum in order not to affect the color display. In other embodiments, the area of each sub-pixel may be set as follows: the area of the blue sub-pixel is equal to that of the red sub-pixel, the area of the red sub-pixel is larger than that of the green sub-pixel, and the area of the green sub-pixel is larger than or equal to that of the infrared light emitting sub-pixel.
Referring to fig. 7, fig. 7 is a schematic view of a first exemplary planar structure of a display panel according to a second embodiment of the present application. The display panel 10 is an OLED display panel, and the pixel array thereof includes a plurality of first pixel rows 61, second pixel rows 62 and third pixel rows 63 alternately arranged, the first pixel rows 61 are formed by blue sub-pixels 601 arranged side by side, the second pixel rows 62 are formed by green sub-pixels 602 arranged side by side, and the third pixel rows 63 are formed by red sub-pixels 603 arranged side by side; in the adjacent first pixel row 61, the blue subpixels 601 are arranged alternately in the column direction, in the adjacent second pixel row 62, the green subpixels 602 are arranged alternately in the column direction, and in the adjacent third pixel row 63, the red subpixels 603 are arranged alternately in the column direction. Meanwhile, the green sub-pixel 602 in each second pixel row 62 is disposed to be staggered with the blue sub-pixel 601 in the first pixel row 61 and the red sub-pixel 603 in the third pixel row 63 adjacent thereto, respectively. The centers of the 2 first sub-pixels and the 2 second sub-pixels which are arranged in an array are sequentially connected to form a second virtual quadrangle 44, and 1 third sub-pixel is arranged in each second virtual quadrangle 44. Of the 2 first sub-pixels, the 2 second sub-pixels, and the third sub-pixels located in the second virtual quadrangle 44 forming the second virtual quadrangle 44, at least one infrared sub-pixel 404 is disposed on a connection line of at least one adjacent heterochromatic sub-pixel. The first sub-pixel, the second sub-pixel and the third sub-pixel are different color sub-pixels and are selected from red sub-pixels, green sub-pixels and blue sub-pixels.
Referring to fig. 7, centers of 2 blue subpixels 601 and 2 red subpixels 603 arranged in an array are sequentially connected to form a second virtual quadrangle 641, and 1 green subpixel 602 is disposed in each second virtual quadrangle 641, at this time, two ends of two sides of each second virtual quadrangle 641 in the column direction are different color subpixels, and therefore, the two sides can be provided with infrared subpixels 604; the red sub-pixel 603 or the blue sub-pixel 601 at the corner of each first virtual quadrangle 641 and the green sub-pixel 602 inside the first virtual quadrangle are different color sub-pixels, and an infrared sub-pixel 604 can be disposed on the connection line of the red sub-pixel 603 or the blue sub-pixel and the green sub-pixel 602 inside the first virtual quadrangle. In one embodiment, the center of infrared subpixel 604 is disposed at the midpoint of the line connecting adjacent heterochromatic subpixels.
In an embodiment, as shown in fig. 8, fig. 8 is a schematic view of a second exemplary planar structure of a display panel provided in the second embodiment of the present application, where centers of 2 blue subpixels 601 and 2 green subpixels 602 arranged in an array in sequence may also form second virtual quadrangles 642, and 1 red subpixel 603 is disposed in each second virtual quadrangle 642, at this time, two ends of two sides of each second virtual quadrangle 642 in the column direction are different color subpixels, so that infrared subpixels 604 may be disposed on each of the two sides; the green sub-pixel 602 or the blue sub-pixel 601 at the corner of each first virtual quadrangle 642 and the red sub-pixel 603 inside the first virtual quadrangle are different color sub-pixels, and the connection line of the different color sub-pixels can also be provided with an infrared sub-pixel 604. In one embodiment, the center of infrared subpixel 604 is disposed at the midpoint of the line connecting adjacent heterochromatic subpixels.
In an embodiment, as shown in fig. 9, fig. 9 is a schematic view of a third exemplary planar structure of a display panel provided in the second embodiment of the present application, where centers of 2 green sub-pixels 602 and 2 red sub-pixels 603 arranged in an array are sequentially connected to form a second virtual quadrangle 643, 1 blue sub-pixel 601 is disposed in each second virtual quadrangle 643, at this time, two ends of two sides of each second virtual quadrangle 643 in a column direction are different color sub-pixels, and therefore, infrared sub-pixels 604 may be disposed on each of the two sides; the red sub-pixel 603 or the green sub-pixel 602 at the corner of each first virtual quadrangle 643 and the blue sub-pixel 601 inside the first virtual quadrangle are different color sub-pixels, and an infrared sub-pixel 604 can be disposed on the connection line of the red sub-pixel 603 or the green sub-pixel 602. In one embodiment, the center of infrared subpixel 604 is disposed at the midpoint of the line connecting adjacent heterochromatic subpixels.
In one embodiment, the green sub-pixel, the red sub-pixel, the blue sub-pixel and the infrared light emitting sub-pixel are rectangular in shape, and the infrared light emitting sub-pixel may be the same as or different from the other sub-pixels, for example, the infrared light emitting sub-pixel may be rectangular, circular or other polygonal shape. Referring to fig. 7, 8 or 9, in one embodiment, the green, blue and infrared light emitting sub-pixels are each square in shape and the red sub-pixel is rectangular in shape. In one embodiment, the rectangle may be provided with a chamfer, i.e. a round rectangular structure, which is convenient for manufacturing. In other embodiments, the shapes of the green sub-pixel, the red sub-pixel, the blue sub-pixel, and the infrared light emitting sub-pixel may also be other polygons, such as a diamond shape or a circular shape, and the shapes of the infrared light emitting sub-pixel and other sub-pixels may be the same or different, which is not described herein again.
In the area arrangement of each sub-pixel, one way is: the area of the blue sub-pixel is larger than that of the green sub-pixel, the area of the green sub-pixel is larger than that of the red sub-pixel, and the area of the red sub-pixel is larger than or equal to that of the infrared light emitting sub-pixel. In other embodiments, the area of each sub-pixel may be set as follows: the area of the blue sub-pixel is equal to that of the green sub-pixel, the area of the green sub-pixel is larger than that of the red sub-pixel, and the area of the red sub-pixel is larger than that of the infrared light-emitting sub-pixel.
Referring to fig. 10, fig. 10 is a schematic plan view of a display panel according to a third embodiment of the present application. The display panel 10 is an OLED display panel, and the pixel array includes a plurality of pixel rows 91, where the pixel rows 91 are formed by red sub-pixels 901, green sub-pixels 902, and blue sub-pixels 903 alternately, and sub-pixels in the same column in the plurality of pixel rows are sub-pixels of the same color, for example, a first column is a red sub-pixel 901, a second column is a green sub-pixel 902, and a third column is a blue sub-pixel 903. The centers of the four sub-pixels arranged in an array are sequentially connected to form a third virtual quadrangle 92, and the four sub-pixels may be 2 red sub-pixels and 2 green sub-pixels, or 2 green sub-pixels and two blue sub-pixels, or 2 blue sub-pixels and 2 red sub-pixels. At least one infrared sub-pixel 904 is arranged on a connecting line of at least one adjacent heterochromatic sub-pixel in four pixels forming the third virtual quadrangle.
In one embodiment, centers of 2 red subpixels 901 and 2 green subpixels 903 arranged in an array are sequentially connected to form a third virtual quadrangle 921, at this time, two ends of two sides of each third virtual quadrangle 92 in the row direction are different color subpixels, and therefore, the two sides can be provided with infrared subpixels 904; the red sub-pixel 901 at the corner of each third virtual quadrangle 921 and the green sub-pixel 902 at the opposite corner are adjacent different color sub-pixels, and an infrared sub-pixel 904 may be disposed on the connection line. In one embodiment, the center of the infrared subpixel 904 is disposed at the midpoint of the line connecting adjacent heterochromatic subpixels.
For another example, centers of 2 blue subpixels 903 and 2 green subpixels 902 arranged in an array are sequentially connected to form a third virtual quadrangle 922, at this time, two ends of two sides of each third virtual quadrangle 922 in the row direction are different color subpixels, and therefore, the two sides may be provided with infrared subpixels 904; the green sub-pixel 902 at the corner of each third virtual quadrangle 922 and the blue sub-pixel 903 at the opposite corner are adjacent different color sub-pixels, and an infrared sub-pixel 904 may be disposed on the connection line of the adjacent different color sub-pixels. In one embodiment, the center of the infrared subpixel 904 is disposed at the midpoint of the line connecting adjacent heterochromatic subpixels.
For another example, the centers of 2 blue subpixels 903 and 2 red subpixels 901 arranged in an array are sequentially connected to form third virtual quadrangles 923, at this time, two ends of two sides of each third virtual quadrangle 923 in the row direction are different color subpixels, and therefore the two sides can both be provided with infrared subpixels 904; the red sub-pixel 901 at the corner of each third virtual quadrangle 923 and the blue sub-pixel 903 at the opposite corner of the third virtual quadrangle are adjacent different color sub-pixels, and an infrared sub-pixel 904 may be disposed on the connection line of the adjacent different color sub-pixels. In one embodiment, the center of the infrared subpixel 904 is disposed at the midpoint of the line connecting adjacent heterochromatic subpixels.
In one embodiment, the pixel array includes a third virtual quadrangle 921 formed by sequentially connecting centers of 2 red subpixels 901 and 2 green subpixels 903 arranged in an array, a third virtual quadrangle 922 formed by sequentially connecting centers of 2 blue subpixels 903 and 2 green subpixels 902 arranged in an array, and a third virtual quadrangle 923 formed by sequentially connecting centers of 2 blue subpixels 903 and 2 red subpixels 901 arranged in an array, where the infrared emission subpixel 904 may be only disposed on a connection line of adjacent different color subpixels in any one of the third virtual quadrangles, may be disposed on a connection line of adjacent different color subpixels in any two of the third virtual quadrangles, or may be disposed on a connection line of adjacent different color subpixels in three of the third virtual quadrangles.
In one embodiment, the green sub-pixel, the red sub-pixel, the blue sub-pixel and the infrared light emitting sub-pixel are rectangular in shape, and the infrared light emitting sub-pixel may be the same as or different from the other sub-pixels, for example, the infrared light emitting sub-pixel may be rectangular, circular or other polygonal shape. Referring to fig. 10, in one embodiment, the green, blue and red sub-pixels are all rectangular in shape and the infrared light emitting sub-pixel is square in shape. In one embodiment, the rectangle may be provided with a chamfer, i.e. a round rectangular structure, which is convenient for manufacturing. In other embodiments, the shapes of the green sub-pixel, the red sub-pixel, the blue sub-pixel, and the infrared light emitting sub-pixel may also be other polygons, such as a diamond shape or a circular shape, and the shapes of the infrared light emitting sub-pixel and other sub-pixels may be the same or different, which is not described herein again.
In the area setting of each sub-pixel, one way is: the area of the blue sub-pixel, the area of the green sub-pixel and the area of the red sub-pixel are the same, and the area of the infrared light-emitting sub-pixel is smaller than the areas of the other three sub-pixels.
The application provides a display device is integrated to set up infrared luminescence sub pixel on display panel, and infrared luminescent material wherein can emit the function of infrared light in order to realize the dot matrix projector under light-emitting component's the illumination, and the infrared light only need pierce through the screen once, has improved the utilization ratio of infrared light, has also reduced the diffraction effect of display screen pixel circuit and metal level to light. Moreover, the light-emitting element in the infrared light-emitting sub-pixel adopts an OLED light-emitting element, and the preparation process and the preparation difficulty of the display panel are not increased.
Referring to fig. 11, fig. 11 is a schematic diagram of a film structure of an exemplary pixel array, which includes a TFT substrate 51, an organic film 52, a TFE layer 53, and a film 54, which are sequentially stacked, and the film structure of the pixel array according to the embodiment of the present disclosure is described below with reference to a manufacturing method.
First, the TFT substrate 51 is prepared, which may specifically include the following steps:
(1) a substrate base plate was prepared on a glass carrier.
In some exemplary embodiments, the substrate may be a flexible substrate, for example, a laminate structure including a first flexible material layer, a first inorganic material layer, a semiconductor layer, a second flexible material layer, and a second inorganic material layer stacked on a glass carrier, forming the first flexible material layer/the first inorganic material layer/the semiconductor layer/the second flexible material layer/the second inorganic material layer. The first flexible material layer and the second flexible material layer can be made of Polyimide (PI), polyethylene terephthalate (PET) or polymer soft films subjected to surface treatment; the materials of the first inorganic material layer and the second inorganic material layer can also be called Barrier (Barrier) layers, and silicon nitride (SiNx) or silicon oxide (SiOx) and the like can be adopted to improve the water and oxygen resistance of the substrate; amorphous silicon (a-Si) is used as the semiconductor layer. Firstly, coating a flexible material such as polyimide on a glass carrier plate, and forming a first flexible material layer after curing and film forming; then depositing a layer of barrier film, such as silicon nitride, on the first flexible material layer to form a first barrier layer covering the first flexible layer; then depositing a semiconductor layer, such as an amorphous silicon film, on the first barrier layer to form a semiconductor layer covering the first barrier layer; then coating a layer of flexible material, such as polyimide, on the semiconductor layer, and curing to form a second flexible layer; and then depositing a layer of barrier film on the second flexible layer to form a second barrier layer covering the second flexible layer, thereby obtaining the substrate base plate.
(2) And preparing a driving structure layer on the substrate base plate. The driving structure layer includes a plurality of driving circuits, each of which includes a plurality of transistors and at least one storage capacitor, for example, 2T1C, 4T1C, or 7T 1C. In the following, the red sub-pixel is taken as an example, and the driving circuit of the red sub-pixel is taken as an example only with one transistor and one storage capacitor.
The preparation process of the driving structure layer is as follows:
sequentially depositing an insulating film and an active layer film on a substrate, and then patterning the active layer film to form a first insulating layer covering the substrate and an active layer with patterns arranged on the first insulating layer;
then, sequentially depositing an insulating film and a metal film on the active layer with the pattern, and patterning the metal film to form a second insulating layer covering the active layer and a first gate metal layer with the pattern, wherein the pattern of the first gate metal layer at least comprises a first gate electrode and a first capacitor electrode;
then depositing an insulating film and a metal film on the first gate metal layer in sequence, and patterning the metal film to form a third insulating layer covering the first gate metal layer and a second gate metal layer with a pattern, wherein the pattern of the second gate metal layer at least comprises a second capacitor electrode, and the position of the second capacitor electrode corresponds to the position of the first capacitor electrode;
then depositing an insulating film on the second gate metal layer, patterning the insulating film to form a fourth insulating layer with patterns, wherein the fourth insulating layer is covered on the second gate metal layer and is provided with at least two first via holes, and the fourth insulating layer, the third insulating layer and the second insulating layer in the two first via holes are etched to expose the surface of the first active layer;
and then depositing a metal film on the fourth insulating layer, forming a source-drain metal layer with a pattern on the fourth insulating layer after composition, wherein the source-drain metal layer at least comprises a first source electrode and a first drain electrode which are positioned in the display area, and the first source electrode and the first drain electrode are respectively connected with the first active layer through the first through hole.
In the driving circuit of the red subpixel of the display region, the first active layer, the first gate electrode, the first source electrode, and the first drain electrode may constitute a first transistor, and the first capacitor electrode and the second capacitor electrode may constitute a first storage capacitor. In the above manufacturing process, the driving circuits of the green sub-pixel, the blue sub-pixel, and the infrared light emitting sub-pixel may be formed at the same time.
In one embodiment, the first, second, third, and fourth insulating layers may employ any one or more of silicon oxide (SiOx), silicon nitride (SiNx), and silicon oxynitride (SiON), and may be a single layer, a multilayer, or a composite layer. The first insulating layer can also be called a buffer layer and is used for improving the water resistance and oxygen resistance of the substrate; the second insulating layer and the third insulating layer are gate insulating layers; the fourth insulating layer is an Interlayer Dielectric (ILD) layer. The first metal film, the second metal film and the third metal film are made of metal materials, such as one or more of silver, copper, aluminum, titanium and molybdenum, or alloy materials containing the above metals, such as aluminum neodymium alloy or molybdenum niobium alloy, and can be in a single-layer structure or a multi-layer composite structure, such as Ti/Al/Ti. The active layer film is made of one or more materials such as amorphous indium gallium zinc oxide (a-IGZO), zinc oxynitride (ZnNO), Indium Zinc Tin Oxide (IZTO), amorphous silicon (a-Si), polycrystalline silicon (p-Si), hexathiophene and polythiophene.
(3) And forming a flat layer on the substrate with the pattern.
And coating an organic material on the substrate base plate on which the pattern is formed, curing to form a flat layer covering the whole substrate base plate, and forming a plurality of second through holes on the flat layer of the display area through the processes of masking, exposing, developing and the like. The flat layers in the first via holes are etched away, and the surface of the first drain electrode of the first transistor of the driving circuit of the red sub-pixel, the surface of the first drain electrode of the first transistor of the driving circuit of the green sub-pixel, the surface of the first drain electrode of the first transistor of the driving circuit of the blue sub-pixel and the surface of the first drain electrode of the first transistor of the driving circuit of the infrared light-emitting sub-pixel are respectively exposed.
After the TFT substrate is obtained, continuously preparing an organic film layer on the TFT substrate, which specifically comprises the following steps:
(4) a first electrode pattern is formed on the base substrate on which the pattern is formed. In one embodiment, the first electrode is a reflective anode.
In one embodiment, a conductive film is deposited on the substrate base plate on which the aforementioned pattern is formed, and the conductive film is patterned to form a first electrode pattern. The anode of the red sub-pixel is connected with the first drain electrode of the first transistor of the red sub-pixel through the second via hole, the anode of the green sub-pixel is connected with the first drain electrode of the first transistor of the green sub-pixel through the second via hole, the anode of the blue sub-pixel is connected with the first drain electrode of the first transistor of the blue sub-pixel through the second via hole, and the anode of the infrared light-emitting sub-pixel is connected with the first drain electrode of the first transistor of the infrared light-emitting sub-pixel through the second via hole.
In one embodiment, the first electrode may be made of a metal material, such as any one or more of magnesium, silver, copper, aluminum, titanium, and molybdenum, or an alloy containing the above metals, such as an aluminum-neodymium alloy or a molybdenum-niobium alloy, and may have a single-layer structure, or a multi-layer composite structure, such as Ti/Al/Ti, or the like, or a stacked structure of a metal and a transparent conductive material, such as ITO/Ag/ITO, Mo/AlNd/ITO, or the like.
(5) On the base substrate on which the foregoing pattern is formed, a Pixel Definition Layer (PDL) pattern is formed.
In one embodiment, a pixel definition film is coated on the substrate base plate on which the patterns are formed, and a pixel definition layer pattern is formed through a mask, exposure and development process. The pixel definition layer of the display area comprises a plurality of sub-pixel definition parts, a plurality of pixel definition layer openings are formed between the adjacent sub-pixel definition parts, and the pixel definition layers in the pixel definition layer openings are developed to expose at least part of the surface of the first anode of the red sub-pixel, at least part of the surface of the first anode of the green sub-pixel, at least part of the surface of the first anode of the blue sub-pixel and at least part of the surface of the first anode of the infrared light-emitting sub-pixel.
In one embodiment, the pixel defining layer may employ polyimide, acryl, polyethylene terephthalate, or the like.
(6) On the base substrate on which the aforementioned pattern is formed, a Spacer Pillar (PS) pattern is formed.
In one embodiment, the spacer pillar pattern is formed by coating an organic material film on the substrate on which the aforementioned pattern is formed, and performing masking, exposure, and development processes. The spacer columns may serve as support layers to support the FMM during the evaporation process. In one embodiment, a repeating unit is spaced between two adjacent spacer pillars along the row arrangement direction of the sub-pixels.
(7) An organic functional layer and a second electrode are sequentially formed on the base substrate on which the pattern is formed.
In one embodiment, the second electrode is a transparent cathode. The light-emitting element can emit light from the side far away from the substrate base plate through the transparent cathode, so that top emission is realized. In one embodiment, the organic functional layers of the light emitting element include: a hole injection layer, a hole transport layer, a light emitting layer, and an electron transport layer.
In one embodiment, the hole injection layer and the hole transport layer are sequentially formed on the substrate on which the patterns are formed by evaporation using an Open Mask (Open Mask), and then the blue light emitting layer, the green light emitting layer, and the red light emitting layer are sequentially formed by evaporation using an FMM, and then the electron transport layer and the cathode are sequentially formed by evaporation using an Open Mask. The hole injection layer, the hole transport layer, the electron transport layer and the cathode are all common layers of a plurality of sub-pixels. In other embodiments, the organic functional layer may further include: and a microcavity regulating layer located between the hole transporting layer and the light-emitting layer. For example, after the hole transport layer is formed, a blue microcavity adjusting layer, a blue light emitting layer, a green microcavity adjusting layer, a green light emitting layer, a red microcavity adjusting layer, and a red light emitting layer may be sequentially formed by vapor deposition using FMM.
In one embodiment, the organic functional layer is formed in the sub-pixel region, and the organic functional layer is connected with the anode. The cathode is formed on the pixel defining layer and connected to the organic functional layer.
In one embodiment, the cathode may employ any one or more of magnesium, silver, aluminum, or an alloy comprising any one or more of the foregoing metals, or a transparent conductive material such as Indium Tin Oxide (ITO), or a multilayer composite structure of a metal and a transparent conductive material.
In one embodiment, a light coupling layer may be formed on a side of the cathode away from the substrate base plate, and the light coupling layer may be a common layer of the plurality of sub-pixels. The optical coupling layer may cooperate with the transparent cathode to provide an increased light output. In one embodiment, the optical coupling layer may be of a semiconductor material.
After the organic film layer is formed, the organic film layer is packaged to form a packaging layer, and the method specifically comprises the following steps:
(8) and forming an encapsulation layer on the substrate with the pattern. In one embodiment, the encapsulation layer may include a first encapsulation layer, a second encapsulation layer, and a third encapsulation layer stacked. The first packaging layer is made of inorganic materials and covers the cathode in the display area; the second packaging layer is made of organic materials and covers the first packaging layer; the third packaging layer is made of inorganic materials and covers the first packaging layer and the second packaging layer. In other embodiments, the encapsulation layer may also adopt an inorganic/organic/inorganic five-layer structure.
After the packaging is finished, the method also comprises the following steps:
(9) a photo-infrared light emitting layer 200 is formed over the infrared light emitting sub-pixel. In one embodiment, a photo-infrared light emitting material is coated on the infrared light emitting sub-pixel region on the substrate on which the aforementioned pattern is formed to form a photo-infrared light emitting layer, or an infrared Quantum Dot Color Filter (QDCF) is formed on the infrared light emitting sub-pixel region through a photolithography process.
In one embodiment, the thickness of the photo-infrared light-emitting layer is 1-30 μm.
In one embodiment, the infrared quantum dot color filter is a green light excited photo-infrared luminescent material, and at this time, the luminescent material corresponding to the infrared luminescent sub-pixel is a green luminescent material. In one embodiment, the infrared quantum dot color filter may be formed using nanoparticles composed of group II-VI or III-V elements dispersed in a photoresist, such as one or more of CdSe/CdS, PdSe, and PdS. In one embodiment, the nanoparticles have a particle size of between 2 and 15 nm.
After the photo-infrared light emitting layer is formed, an OC layer is formed by applying an insulating cover (OC) coating, and planarization is performed at the same time.
The application provides a display device is integrated to set up infrared light-emitting sub-pixel on display panel, and infrared luminescent material wherein can emit the function of infrared light in order to realize the dot matrix projector under light-emitting component's the illumination, and the infrared light only need pierce through the screen once, has improved the utilization ratio of infrared light, has also reduced the diffraction effect of display screen pixel circuit and metal level to light to the accuracy of facial discernment has been improved. Moreover, the light-emitting element in the infrared light-emitting sub-pixel adopts an OLED light-emitting element, and the preparation process and the preparation difficulty of the display panel are not increased.
The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (26)

1. A display panel is provided, wherein a pixel array of the display panel comprises a plurality of sub-pixels, and the plurality of sub-pixels comprise a first sub-pixel, a second sub-pixel, a third sub-pixel and an infrared light emitting sub-pixel, wherein the first sub-pixel, the second sub-pixel and the third sub-pixel have different colors, and at least one infrared light emitting sub-pixel is arranged on a connecting line of centers of two adjacent different color sub-pixels;
the infrared light-emitting sub-pixel comprises a light-emitting element and a photo-induced infrared light-emitting material positioned on the light-emitting element, and the photo-induced infrared light-emitting material emits infrared light under the irradiation of the light-emitting element.
2. The display panel according to claim 1, wherein the photo-infrared light-emitting sub-pixel is formed by an infrared quantum dot color filter.
3. The display panel of claim 2, wherein an infrared light emitting sub-pixel is disposed at a midpoint of a connecting line between centers of two adjacent different color sub-pixels.
4. The display panel according to any one of claims 1 to 3, wherein the first sub-pixel is a blue sub-pixel; the second sub-pixel is a green sub-pixel; the third sub-pixel is a red sub-pixel;
the first sub-pixel, the second sub-pixel, the third sub-pixel and the infrared light emitting sub-pixel are circular or polygonal in shape.
5. The display panel according to any one of claims 1 to 4, wherein the first sub-pixels and the third sub-pixels are alternately arranged in a row direction to form a plurality of first pixel rows, and the first sub-pixels and the third sub-pixels located in the same column in the plurality of first pixel rows are alternately arranged; the second sub-pixels are arranged side by side in the row direction to form a plurality of second pixel rows, and the second sub-pixels are arranged in a manner of being staggered with the first sub-pixels and the third sub-pixels of the adjacent rows;
the centers of two first sub-pixels and two third sub-pixels which are arranged in an array form a line in sequence to form a first virtual quadrangle, and one second sub-pixel is arranged in each first virtual quadrangle; at least one connecting line of the first virtual quadrangle is provided with an infrared light-emitting sub-pixel, the connecting line comprises four sides of the first virtual quadrangle, a connecting line formed by the centers of two third sub-pixels on the corners of the first virtual quadrangle and the center of a second sub-pixel in the first virtual quadrangle is formed by the centers of two third sub-pixels on the corners of the first virtual quadrangle.
6. The display panel according to claim 5, wherein centers of the first sub-pixel and the third sub-pixel in the first pixel row are not in a straight line, and the center of the first sub-pixel is lower than the center of the second sub-pixel;
the centers of two first sub-pixels and two third sub-pixels which are arranged in an array are sequentially connected to form a first virtual trapezoid, and one second sub-pixel is arranged in each first virtual trapezoid; at least one edge of the first virtual trapezoid is provided with an infrared light emitting sub-pixel.
7. The display panel according to claim 6, wherein the longer bottom side of the first virtual trapezoid is provided with an infrared light emitting sub-pixel.
8. The display panel according to claim 6, wherein at least one waist of the first virtual trapezoid is provided with an infrared light emitting sub-pixel.
9. The display panel according to claim 8, wherein two waists of the first virtual trapezoid are each provided with an infrared light-emitting sub-pixel.
10. The display panel according to claim 6, wherein at least one waist of the first virtual trapezoid is provided with an infrared light emitting sub-pixel;
and the longer bottom edge of the first virtual trapezoid is provided with an infrared light-emitting sub-pixel.
11. The display panel according to claim 10, wherein two waists of the first virtual trapezoid are respectively provided with an infrared light emitting sub-pixel;
and the longer bottom edge of the first virtual trapezoid is provided with an infrared light-emitting sub-pixel.
12. The display panel according to claim 5, wherein centers of the first sub-pixel and the third sub-pixel in the first pixel row are on a straight line;
the centers of two first sub-pixels and two third sub-pixels which are arranged in an array are sequentially connected to form a first virtual rectangle, one second sub-pixel is arranged in each first virtual rectangle, and infrared light emitting sub-pixels are arranged on at least one edge of each first virtual rectangle.
13. The display panel according to claim 12, wherein four sides of the first virtual rectangle are each provided with an infrared light emitting sub-pixel.
14. The display panel according to any one of claims 4 to 12, wherein the first sub-pixel, the second sub-pixel, the third sub-pixel and the infrared light emitting sub-pixel have a diamond shape.
15. The display panel according to any one of claims 4 to 12, wherein the area of the third sub-pixel is larger than the area of the first sub-pixel, the area of the first sub-pixel is larger than the area of the second sub-pixel, and the area of the second sub-pixel is larger than the area of the infrared light emitting sub-pixel.
16. The display panel according to any one of claims 1 to 4, wherein the pixel array comprises a plurality of rows of first pixel rows, second pixel rows and third pixel rows alternately arranged, the first pixel rows are formed by arranging first sub-pixels side by side, the second pixel rows are formed by arranging second sub-pixels side by side, and the third pixel rows are formed by arranging third sub-pixels side by side; in adjacent first pixel rows, the first sub-pixels are arranged in a staggered manner in the column direction, in adjacent second pixel rows, the second sub-pixels are arranged in a staggered manner in the column direction, and in adjacent third pixel rows, the third sub-pixels are arranged in a staggered manner in the column direction; meanwhile, the second sub-pixels in the second pixel row are respectively arranged in a staggered manner with the first sub-pixels in the first pixel row and the third sub-pixels in the third pixel row adjacent to the second sub-pixels;
the centers of two first sub-pixels and two third sub-pixels which are arranged in an array form a line in sequence to form second virtual quadrangles, and one second sub-pixel is arranged in each second virtual quadrangle; at least one connecting line of the second virtual quadrangle is provided with an infrared light-emitting sub-pixel, the connecting line comprises two edges of which two ends are different color sub-pixels in the second virtual quadrangle, the centers of two third sub-pixels on the corners of the second virtual quadrangle are respectively connected with the center of a second sub-pixel in the second virtual quadrangle, and the centers of two third sub-pixels on the corners of the second virtual quadrangle are respectively connected with the center of a second sub-pixel in the second virtual quadrangle;
or the centers of two second sub-pixels and two first sub-pixels which are arranged in an array are sequentially connected to form a second virtual quadrangle, and a third sub-pixel is arranged in each second virtual quadrangle; at least one connecting line of the second virtual quadrangle is provided with an infrared light-emitting sub-pixel, the connecting line comprises two edges of which two ends are different color sub-pixels in the second virtual quadrangle, the centers of two second sub-pixels on the corners of the second virtual quadrangle are respectively connected with a connecting line formed by the centers of third sub-pixels in the second virtual quadrangle, and the centers of two first sub-pixels on the corners of the second virtual quadrangle are respectively connected with the centers of third sub-pixels in the second virtual quadrangle;
or the centers of two third sub-pixels and two second sub-pixels which are arranged in an array are sequentially connected to form second virtual quadrangles, and each second virtual quadrangle is internally provided with one first sub-pixel; at least one connecting line of the second virtual quadrangle is provided with an infrared light-emitting sub-pixel, the connecting line comprises two edges of which two ends are different color sub-pixels in the second virtual quadrangle, the centers of the two second sub-pixels on the corners of the second virtual quadrangle are respectively connected with the center of the first sub-pixel in the second virtual quadrangle, and the centers of the two second sub-pixels on the corners of the second virtual quadrangle are respectively connected with the center of the first sub-pixel in the second virtual quadrangle.
17. The display panel according to claim 16, wherein the two sides of the second virtual quadrangle, at two ends of which are different color sub-pixels, are respectively provided with infrared light emitting sub-pixels.
18. The display panel according to any one of claims 16 to 17, wherein the area of the first sub-pixel is equal to the area of the second sub-pixel, the area of the first sub-pixel is larger than the area of the third sub-pixel, and the area of the third sub-pixel is larger than the area of the infrared light emitting sub-pixel.
19. The display panel according to any one of claims 1 to 4, wherein the pixel array comprises a plurality of pixel rows formed by alternating arrangement of first sub-pixels, second sub-pixels and third sub-pixels, and sub-pixels in the same column in the plurality of pixel rows are sub-pixels of the same color;
the infrared light-emitting sub-pixels are arranged in at least one of the following modes:
(1) the centers of the two first sub-pixels and the centers of the two second sub-pixels which are distributed in an array form a connecting line in sequence to form a third virtual quadrangle; at least one connecting line of the third virtual quadrangle is provided with an infrared light-emitting sub-pixel, and the connecting line comprises two edges of the third virtual quadrangle, two ends of which are different color sub-pixels, and two diagonal lines of which two ends are different color sub-pixels;
(2) the centers of the two second sub-pixels and the centers of the two third sub-pixels which are distributed in an array form a line in sequence to form a fourth virtual quadrangle; at least one connecting line of the fourth virtual quadrangle is provided with an infrared light-emitting sub-pixel, and the connecting line comprises two edges of the fourth virtual quadrangle, two ends of which are different color sub-pixels, and two diagonal lines of which two ends are different color sub-pixels;
(3) the centers of the two third sub-pixels and the centers of the two first sub-pixels which are distributed in an array form a fifth virtual quadrangle by connecting lines in sequence; and the connecting line comprises two edges of the heterochromatic sub-pixel at two ends in the fifth virtual quadrangle, and two diagonal lines of the heterochromatic sub-pixel at two ends of the fifth virtual quadrangle.
20. The display panel according to claim 19, wherein the arrangement of the infrared light emitting sub-pixels satisfies the following manner:
(1) the centers of two first sub-pixels and two second sub-pixels which are distributed in a display manner are sequentially connected to form a third virtual quadrangle, and infrared light-emitting sub-pixels are arranged on the diagonal lines of the different-color sub-pixels at the two ends of the third virtual quadrangle;
(2) the centers of two second sub-pixels and two third sub-pixels which are distributed in an array form a line in sequence to form a fourth virtual quadrangle, and infrared light-emitting sub-pixels are arranged on the diagonal lines of the different-color sub-pixels at the two ends of the fourth virtual quadrangle;
(3) the centers of the two third sub-pixels and the centers of the two first sub-pixels which are distributed in an array form a fifth virtual quadrangle through sequential connection, and infrared light-emitting sub-pixels are arranged on diagonal lines of the different-color sub-pixels at two ends of the fifth virtual quadrangle.
21. The display panel according to claim 20, wherein the arrangement of the infrared light emitting sub-pixels satisfies the following manner:
(1) the centers of two first sub-pixels and two second sub-pixels which are distributed in a display manner are sequentially connected to form a third virtual quadrangle, and infrared light-emitting sub-pixels are arranged on the intersection points of two diagonal lines of the different-color sub-pixels at two ends of the third virtual quadrangle;
(2) the centers of two second sub-pixels and two third sub-pixels which are distributed in an array form a line in sequence to form a fourth virtual quadrangle, and infrared light-emitting sub-pixels are arranged on the intersection points of two diagonal lines of the different-color sub-pixels at two ends of the fourth virtual quadrangle;
(3) the centers of the two third sub-pixels and the centers of the two first sub-pixels which are distributed in an array are sequentially connected to form a fifth virtual quadrangle, and the two ends of the fifth virtual quadrangle are provided with infrared light-emitting sub-pixels on the intersection points of the two diagonals of the different-color sub-pixels.
22. The display panel according to any one of claims 16 to 21, wherein the first sub-pixel, the second sub-pixel, the third sub-pixel and the infrared light emitting sub-pixel have a rectangular shape.
23. The display panel according to any one of claims 19 to 21, wherein the area of the first sub-pixel is equal to the area of the second sub-pixel, the area of the first sub-pixel is equal to the area of the third sub-pixel, and the area of the first sub-pixel is larger than the area of the infrared light emitting sub-pixel.
24. The display device according to any one of claims 1 to 23, wherein the light-emitting elements in the first sub-pixel, the second sub-pixel, the third sub-pixel, and the infrared light-emitting sub-pixel are organic light-emitting diodes.
25. A display device comprising the display panel of any one of claims 1 to 24 and an optical device disposed on one side of the display panel, the optical device comprising an infrared lens.
26. A terminal comprising the display device of claim 25.
CN202111175092.3A 2021-10-09 2021-10-09 Display panel, display device and terminal Pending CN115000122A (en)

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