CN112420951B - Display device and preparation method thereof - Google Patents
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- CN112420951B CN112420951B CN202011290919.0A CN202011290919A CN112420951B CN 112420951 B CN112420951 B CN 112420951B CN 202011290919 A CN202011290919 A CN 202011290919A CN 112420951 B CN112420951 B CN 112420951B
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- 238000000034 method Methods 0.000 claims description 15
- 229910001316 Ag alloy Inorganic materials 0.000 claims description 12
- SJCKRGFTWFGHGZ-UHFFFAOYSA-N magnesium silver Chemical compound [Mg].[Ag] SJCKRGFTWFGHGZ-UHFFFAOYSA-N 0.000 claims description 12
- 238000005520 cutting process Methods 0.000 claims description 6
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
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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
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
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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
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/1201—Manufacture or treatment
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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
- H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
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- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The application discloses a display device and a preparation method thereof, which are used for avoiding interference of ambient light to a photosensitive device. The embodiment of the application provides a display device, the display device includes: the display device comprises an electroluminescent display module, a sensor module and a direction selector, wherein the sensor module is positioned at one side away from the display surface of the electroluminescent display module, and the direction selector is positioned between the electroluminescent display module and the sensor module; the direction selector includes: the shading layer is provided with a plurality of inclined light transmission channels, and the included angle between the inclined light transmission channels and a plane vertical to the display device is larger than 0; the sensor module comprises a plurality of photosensitive devices, and the photosensitive areas of the photosensitive devices at least correspond to one inclined light transmission channel.
Description
Technical Field
The application relates to the technical field of display, in particular to a display device and a preparation method thereof.
Background
For the organic light emitting diode display (OLED) optical compensation technology, the difference between the actual brightness and the theoretical brightness of the light emitting pixel unit is directly detected by utilizing a photosensitive sensor, and the image quality is further corrected by a driving circuit system and an algorithm, so that a new scheme is provided for solving the problem of afterimage (Mura).
The display device and the Sensor device are located on different base plates (Sensor in Cover) as one of the schemes of optical compensation technology, and have the advantages of low process difficulty, high compensation precision and the like.
Disclosure of Invention
The embodiment of the application provides a display device and a preparation method thereof, which are used for avoiding interference of ambient light to a photosensitive device.
The embodiment of the application provides a display device, the display device includes: the display device comprises an electroluminescent display module, a sensor module and a direction selector, wherein the sensor module is positioned at one side away from the display surface of the electroluminescent display module, and the direction selector is positioned between the electroluminescent display module and the sensor module;
the direction selector includes: the shading layer is provided with a plurality of inclined light transmission channels, and the included angle between the inclined light transmission channels and the direction vertical to the plane where the display device is positioned is larger than 0;
the sensor module comprises a plurality of photosensitive devices, and the photosensitive areas of the photosensitive devices at least correspond to one inclined light transmission channel.
In some embodiments, the light shielding layer includes: and the light absorption substrate, and the inclined light transmission channel comprises an optical fiber.
In some embodiments, the optical path selector comprises: a plurality of light shielding sub-layers and a plurality of light transmitting sub-layers alternately stacked;
each shading sub-layer is provided with a plurality of light holes, the number of the light holes in each shading sub-layer is the same, and the light holes in different shading sub-layers form the inclined light transmission channel;
the light holes in two adjacent light shielding sublayers overlap at the orthographic projection part of the plane where the display device is located; and in the adjacent two layers of the shading sublayers, the light holes in the shading sublayers close to the electroluminescent display module are offset by a preset distance along a first direction compared with the light holes in the shading sublayers close to the sensor module.
In some embodiments, the included angle between the light passing through the inclined light-transmitting channel and the plane of the display device is 42 ° to 70 °.
In some embodiments, the electroluminescent display module includes a plurality of light emitting devices;
the light emitting devices are in one-to-one correspondence with the photosensitive devices; alternatively, each of the photosensitive devices corresponds to a plurality of the light emitting devices.
In some embodiments, the light emitting device includes an anode, a light emitting functional layer, and a cathode, which are sequentially stacked;
the surface of the electroluminescent display module close to the anode is the display surface;
the cathode includes: a light-transmitting electrode and a shading electrode positioned on one side of the light-transmitting electrode away from the light-emitting functional layer; the shading electrode is provided with a first via hole penetrating through the thickness of the shading electrode, and the orthographic projection of the first via hole on the substrate falls into a light-emitting area of the light-emitting device; or,
the material of the cathode comprises magnesium-silver alloy.
In some embodiments, the light emitting device includes an anode, a light emitting functional layer, and a cathode, which are sequentially stacked;
the surface of the electroluminescent display module close to the cathode is the display surface;
the cathode includes a light transmissive material;
the anode includes a stacked first sub-electrode, a second sub-electrode, and a third sub-electrode;
the first sub-electrode and the third sub-electrode comprise light-transmitting materials, and the material of the second sub-electrode comprises magnesium-silver alloy;
the electroluminescent display module further comprises: a substrate positioned on a side of the anode facing away from the light-emitting functional layer; the substrate is provided with a light-transmitting area in an area corresponding to the light-emitting area of the light-emitting device.
The embodiment of the application provides a preparation method of a display device, which comprises the following steps:
preparing an electroluminescent display module;
preparing a sensor module, wherein the sensor module comprises a plurality of photosensitive devices;
preparing an optical path selector, wherein the direction selector comprises: the light shielding layer is provided with a plurality of inclined light transmission channels, the included angle between the inclined light transmission channels and the direction vertical to the plane where the display device is positioned is larger than 0, and the photosensitive area of the photosensitive device at least corresponds to one inclined light transmission channel;
attaching the electroluminescent display module, the sensor module and the optical path selector; the light path selector is located between the electroluminescent display module and the sensor module, and the sensor module is located at one side away from the display surface of the electroluminescent display module.
In some embodiments, the optical path selector is prepared, specifically comprising:
mixing a plurality of optical fibers with a light absorbing substrate to obtain an optical fiber bundle;
and cutting the optical fiber bundle to obtain the optical path selector, wherein an included angle between the cutting extending direction and the extending direction of the optical fiber is more than 0 degrees and less than 90 degrees.
In some embodiments, the optical path selector is prepared, specifically comprising:
providing a substrate, and alternately forming a shading sub-layer and a light transmission sub-layer on the substrate;
wherein, form and hide the sub-layer, specifically include:
coating a shading material to form a shading sub-layer;
adopting a patterning process to treat the shading sub-layer to form a light hole; wherein, the light holes in two adjacent layers of the shading sublayers overlap at the orthographic projection part of the plane where the display device is positioned; and in the adjacent two layers of the shading sublayers, the light holes in the shading sublayers close to the electroluminescent display module are offset by a preset distance along a first direction compared with the light holes in the shading sublayers close to the sensor module.
According to the display device and the preparation method thereof, the direction selector is arranged between the sensor module and the electroluminescent display module, the direction selector is provided with the inclined light-transmitting channel, and the included angle between the inclined light-transmitting channel and the plane direction of the display device is larger than 0, so that ambient light entering the display device can be prevented from reaching the sensor module through the light-transmitting inclined channel, and interference of the ambient light to the photosensitive device is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of another display device according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of another display device according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of another display device according to an embodiment of the present disclosure;
fig. 5 is a schematic flow chart of a signal receiving method according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a display module in a display device according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a sensor module in a display device according to an embodiment of the present application;
fig. 8 is a schematic diagram of a driving voltage (current) compensation principle of a display device according to an embodiment of the present disclosure;
fig. 9 is a schematic diagram of a compensation method of a display device according to an embodiment of the present application;
fig. 10 is a schematic diagram of a compensation method of another display device according to an embodiment of the present application;
fig. 11 is a schematic diagram of a method for manufacturing a display device according to an embodiment of the present application;
fig. 12 is a schematic diagram of a preparation method of an optical path selector according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present application. It will be apparent that the described embodiments are some, but not all, of the embodiments of the present application. And embodiments and features of embodiments in this application may be combined with each other without conflict. All other embodiments, which can be made by one of ordinary skill in the art without the benefit of the present disclosure, are intended to be within the scope of the present application based on the described embodiments.
Unless otherwise defined, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
It should be noted that the dimensions and shapes of the various figures in the drawings do not reflect true proportions, and are intended to illustrate the present application only. And the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.
As shown in fig. 1 and fig. 2, a display device provided in an embodiment of the present application includes: an electroluminescent display module 1, a sensor module 3 located at a side facing away from a display surface 2 of the electroluminescent display module 1, and a direction selector 4 located between the electroluminescent display module 1 and the sensor module 3;
the direction selector 4 includes: a light shielding layer 6 having a plurality of inclined light transmission channels 5, wherein an included angle θ between the inclined light transmission channels 5 and a direction Y perpendicular to a plane where the display device is located is greater than 0;
the sensor module 3 comprises a plurality of photosensitive devices 7, and the photosensitive areas of the photosensitive devices 7 at least correspond to one inclined light-transmitting channel 5.
The display device provided by the embodiment of the application sets up direction selector between sensor module and electroluminescent display module, and direction selector has slope printing opacity passageway, and the contained angle of slope printing opacity passageway and display device place plane direction is greater than 0 to can avoid entering display device's ambient light to reach sensor module through printing opacity slope passageway, thereby avoid ambient light to cause the interference to photosensitive device.
In some embodiments, as shown in fig. 1 and 2, the electroluminescent display module 1 includes a plurality of light emitting devices 9.
As shown in fig. 1 and 2, the electroluminescent display module further includes: a substrate 10, an encapsulation layer 11. The sensor module further includes: a first substrate base 8, an insulating protective layer 12.
It should be noted that, in the display device provided by the embodiment of the application, the sensor module may be used to detect the brightness of the light emitting device in the electroluminescent display module, so that the interference of ambient light on brightness detection may be avoided, and the accuracy of brightness detection of the electroluminescent device may be improved. Of course, the sensor module may also be used for recognizing the pattern, as shown in fig. 3, where the light emitted by the light emitting device 9 reflects off the valleys and ridges of the pattern 49, and the light reaching direction selector reflected by the ridges reaches different photosensitive devices 7 through the inclined light-transmitting channel 6, and the signal amounts of the photosensitive devices are different due to different light intensities of the reflected light from the valleys and ridges, so that the pattern of the pattern can be recognized according to the signal amounts of the photosensitive devices. The texture 49 in fig. 3 may be, for example, a fingerprint. Due to the arrangement of the optical path selector with the inclined light transmission channel, crosstalk caused by ambient light to line imaging can be avoided, and line identification effect can be improved.
In the implementation, the sensor module is used for detecting the brightness of the light-emitting device, so that whether the light-emitting device has abnormal brightness due to aging and the like can be judged, and the light-emitting device with abnormal brightness can be compensated.
In some embodiments, as shown in fig. 1 and 2, the light emitting devices 9 are in one-to-one correspondence with the photosensitive devices 7.
According to the display device, the light emitting devices and the photosensitive devices are in one-to-one correspondence, the light emitting devices and the photosensitive devices realize transmission of light signals through the inclined light transmission channels in the direction selector, namely, each light emitting device is provided with one photosensitive device to detect the brightness of each light emitting device, so that the light emitting devices needing to be compensated can be accurately determined, and the compensation precision is improved. In addition, as the display device is provided with the light path selector with the inclined light transmission channel, the crosstalk of the brightness detection of the adjacent light emitting devices can be avoided, and the brightness detection accuracy of the light emitting devices can be improved.
In some embodiments, as shown in fig. 1, the light emitting device 9, the light sensing device 1, and the inclined light-transmitting channel 5 are in one-to-one correspondence.
Alternatively, in some embodiments, as shown in fig. 2, each set of light emitting devices 9 and light sensing devices 7 corresponds to a plurality of inclined light transmission channels 5.
Of course, in some embodiments, each of the photosensitive devices corresponds to a plurality of the light emitting devices. In specific implementation, the electroluminescent display module can be divided into a plurality of light emitting areas, each light emitting area comprises a plurality of light emitting devices, and the light emitting areas correspond to the photosensitive devices one by one, namely, the brightness of one light emitting area is detected by using each photosensitive device.
In specific implementation, as shown in fig. 1, the angle range of the light passing through the inclined light-transmitting channel is θ1 to θ2. That is, the light rays with the angle range of theta 1-theta 2 can reach the photosensitive region of the photosensitive device through the inclined light transmission channel.
In some embodiments, the range of the included angle between the light passing through the inclined light-transmitting channel and the plane of the display device is greater than or equal to 42 °. I.e. θ1=42°.
It should be noted that, in consideration of total reflection, the angular range of ambient light that can enter the display device is greater than 0 and less than 42 °. The display device that this embodiment provided, the light through the slope printing opacity passageway in the direction selector and the scope of the contained angle of display device place plane are greater than or equal to 42 to be less than 42 ambient light can not reach the photosensitive device through the slope passageway, and the ambient light that is greater than or equal to 42 can take place total reflection at display device income plain noodles, also can not reach the photosensitive device, thereby the display device that this embodiment provided sets up the direction selector that has slope printing opacity passageway and can avoid ambient light to reach the sensitization district of photosensitive device, can improve photosensitive device to the luminance detection degree of accuracy of light emitting device, and then can improve the degree of accuracy of light emitting device luminance compensation.
In some embodiments, the included angle between the light passing through the inclined light-transmitting channel and the plane of the display device is 42 ° to 70 °. I.e. θ2=70°.
It should be noted that, the maximum light emitting angle of the current light emitting device can reach ±70°, and the range of the included angle between the light of the inclined light transmitting channel and the plane where the display device is located is 42 ° to 70 °, so that the ambient light can be prevented from reaching the photosensitive area of the photosensitive device, and meanwhile, the crosstalk generated in the brightness detection between the adjacent light emitting devices can be avoided, and the detection accuracy is further improved.
In the specific implementation, in the direction selector, the thickness of the light shielding layer, the size of the inclined light transmission channel, the inclination angle of the inclined light transmission channel and the distance between the adjacent inclined light transmission channels can be selected according to actual needs, for example, each parameter of the direction selector can be specifically designed according to the resolution of the display device, and as long as the included angle between the light passing through the inclined light transmission channel and the plane where the display device is located meets the requirement, the influence of ambient light on the photosensitive sensor and the crosstalk of brightness detection between the adjacent light emitting devices can be avoided.
In some embodiments, as shown in fig. 1, the light shielding layer 6 includes: the light absorbing substrate and the inclined light-transmitting channel 5 comprises an optical fiber.
In practice, for example, light having an incident angle of less than 42 ° and greater than 70 ° is incident on the light path selector and absorbed by the light absorbing substrate, and light having an incident angle in the range of 42 ° to 70 ° reaches the photosensitive device through the optical fiber. In the specific implementation, the optical fiber and the light absorption substrate can be mixed to form an optical fiber bundle, and then the optical fiber bundle is cut to obtain the optical path selector, so that the process is simple and easy to realize.
Of course, other arrangements of the light shielding layer and the inclined light-transmitting channel may be used.
In some embodiments, as shown in fig. 4, the optical path selector 4 includes: a plurality of light-shielding sublayers 13 and a plurality of light-transmitting sublayers 14 alternately stacked;
each light shielding sub-layer 13 is provided with a plurality of light transmission holes 15, the number of the light transmission holes 15 in each light shielding sub-layer 13 is the same, and the light transmission holes 15 in different light shielding sub-layers 13 form the inclined light transmission channel 6;
the light holes 15 in two adjacent light shielding sublayers 13 overlap at the orthographic projection part of the plane where the display device is located; and in two adjacent light shielding sublayers 13, the light holes 15 in the light shielding sublayers 13 close to the electroluminescent display module 1 are offset by a preset distance h along the first direction X compared with the light holes 15 in the light shielding sublayers 13 close to the sensor module 3.
In the display device provided by the embodiment of the application, the transparent sub-layer plays a role in planarization. In some embodiments, as shown in fig. 4, the optical path selector further includes a light-transmitting protective layer 16 disposed on the light-shielding sub-layer 13 closest to the electroluminescent display module 1, so that the light-shielding sub-layer on the uppermost layer can be protected, for example, peeling of the light-shielding sub-layer on the uppermost layer can be avoided.
In fig. 4, three light shielding sub-layers 13 and two light transmitting sub-layers 14 are alternately stacked for example. In the specific implementation, the number of layers of the shading sub-layer, the size of the light transmission hole in the shading sub-layer, the preset distance h of the offset between the light transmission holes in the adjacent shading sub-layers and the distance between the adjacent inclined light transmission channels can be selected according to actual needs, for example, each parameter of the direction selector can be specifically designed according to the resolution of the display device, and as long as the included angle between the light passing through the inclined light transmission channels and the plane where the display device is located meets the requirement, the influence of ambient light on the photosensitive sensor and the crosstalk of brightness detection between the adjacent light emitting devices can be avoided.
It should be noted that, when the brightness of the light emitting device needs to be detected by using the sensor module, the display module needs to realize double-sided light emission, that is, the light emitted by the light emitting device needs to reach the light path selector on the side of the display module away from the display surface, and reach the photosensitive area of the photosensitive device through the inclined light transmission channel.
In some embodiments, as shown in fig. 5, the light emitting device 9 includes an anode 17, a light emitting functional layer 18, and a cathode 19, which are sequentially stacked;
the surface of the electroluminescent display module, which is close to the cathode 19, is the display surface 2;
the cathode 19 comprises a light transmissive material;
the anode 17 includes a stacked first sub-electrode, second sub-electrode, and third sub-electrode;
the first sub-electrode and the third sub-electrode comprise light-transmitting materials, and the material of the second sub-electrode comprises magnesium-silver alloy;
the electroluminescent display module further comprises: a substrate 10 on the side of the anode 17 facing away from the light-emitting functional layer 18; the substrate 10 has a light-transmitting region 20 in a region corresponding to the light-emitting region 34 of the light-emitting device.
In some embodiments, as shown in fig. 5, the substrate 10 includes: a second substrate 21, a light shielding conductive layer 22, a buffer layer 23, an active layer 24, a gate insulating layer 25, a gate layer 26, an interlayer insulating layer 27, a source-drain electrode layer 28, and a planarization layer 29, which are sequentially provided over the substrate 21. The display module further comprises a pixel defining layer 30 over the planarization layer 29.
In some embodiments, the light transmissive material may be, for example, indium Tin Oxide (ITO).
It should be noted that the material of the second sub-electrode in the anode includes magnesium-silver alloy, and the transmittance of the magnesium-silver alloy is about 5%, so that light emitted by the light-emitting functional layer can penetrate the anode and reach the photosensitive device through the light-transmitting area and the inclined light-transmitting channel of the substrate, and the brightness of the light-emitting device can be detected by using the photosensitive device. Of course, in the implementation, the second sub-electrode may also be configured to have a silver electrode with a light transmittance greater than 0, for example, a common silver electrode may be thinned so that the light transmittance of the silver electrode is greater than 0.
In particular, as shown in fig. 5, the light-shielding conductive layer 22, the gate layer 26, and the source-drain electrode layer 28 have through holes in the same region, so that the substrate 10 has the light-transmitting region 20, and thus light emitted from the light-emitting device 9 can reach the optical path selector through the through holes and reach the photosensitive region of the photosensitive device through the inclined light-transmitting channel.
It should be noted that, in fig. 1 to 4, the surface of the display module on the side of the light emitting device facing away from the substrate is used as a display surface for distance description, i.e. the display module is top emission. Of course, the display module may also be bottom-emitting, i.e. the surface of the display module on the side of the substrate facing away from the light emitting device is a display surface.
In some embodiments, as shown in fig. 6, the light emitting device 9 includes an anode 17, a light emitting functional layer 18, and a cathode 19, which are sequentially stacked;
the surface of the electroluminescent display module, which is close to the anode 17, is the display surface 2;
as shown in fig. 6, the cathode 19 includes: a light-transmitting electrode 32, and a light-shielding electrode 33 located on a side of the light-transmitting electrode 32 facing away from the light-emitting functional layer 18; the light-shielding electrode 33 has a first via 35 extending through its thickness, the orthographic projection of the first via 35 onto the substrate 10 falling into the light-emitting region 34 of the light-emitting device 9.
The shading electrode is provided with a first via hole penetrating through the thickness of the shading electrode, and the orthographic projection of the first via hole on the substrate falls into a light emitting area of the light emitting device, so that light emitted by the light emitting functional layer can reach the light path selector through the area of the first via hole and reach the photosensitive device through the inclined light transmission channel, and the brightness of the light emitting device can be detected by the photosensitive device.
Alternatively, the display module may be bottom-emitting, and in some embodiments, the cathode gold includes a layer of electrode, and the material of the cathode includes magnesium-silver alloy.
The cathode material comprises magnesium-silver alloy, the transmissivity of the magnesium-silver alloy is about 5%, so that light emitted by the light-emitting functional layer can penetrate through the cathode, reach the light path selector, and reach the photosensitive device through the inclined light-transmitting channel, and the brightness of the light-emitting device can be detected by the photosensitive device.
In some embodiments, when the anode or cathode comprises a magnesium-silver alloy, the magnesium-silver alloy has a thickness of 0.4 microns.
In some embodiments, as shown in fig. 7, the sensor module further comprises: a driving circuit layer 36, a gate insulating layer 37, a first passivation layer 38, a sidewall protection layer 39, a resin layer 40, a second passivation layer 41, bias lines 42, an insulating protection layer 12, which are located over the first substrate base 8; the photosensor 7 includes a first electrode 43, a photoelectric conversion layer 44, and a second electrode 45 which are stacked.
Next, the principle of compensation of the display device will be briefly described. Specifically, as shown in fig. 8, when the light emitting device is not aged, the driving voltage is V, the light emitting brightness is B, the signal quantity detected by the photosensitive device corresponding to the light emitting brightness B is a, after a period of time, when the light emitting device is aged or other reasons, the light emitting device can only reach the light emitting brightness B ', and the signal quantity of the photosensitive device corresponding to the light emitting brightness B ' is a ' when the driving voltage is still V. When the light emitting device is compensated, the light emitting device can be restored to normal light emitting brightness B by adjusting the driving voltage of the light emitting device to enable the signal quantity of the signal received by the photosensitive device to be A. In the implementation, for example, calibration of multiple gray scales (such as Grey 64, 96, 192, etc.) can be performed to obtain a calibration curve of the driving voltage under full gray scale, so as to compensate the brightness of the light emitting device, and thus, the image quality compensation of the display device can be realized.
In specific implementation, a power-on compensation or power-off compensation mode can be adopted.
In specific implementation, as shown in fig. 9, the power-on compensation specifically includes the following steps:
s101, starting a display device, and fixing a preset gray-scale picture for display;
s102, acquiring a corresponding relation between the semaphore and brightness or gray scale;
s103, calibrating the driving voltage of the light-emitting device according to the acquired corresponding relation between the signal quantity and the brightness or the gray scale, and obtaining the corresponding relation between the calibrated brightness or gray scale and the driving voltage;
and S104, compensating the driving voltage according to the corresponding relation between the calibrated brightness or gray scale and the driving voltage, and displaying normally by the display device.
In specific implementation, as shown in fig. 10, the shutdown compensation specifically includes the following steps:
s201, fixing a preset gray-scale picture for display;
s202, acquiring a corresponding relation between a semaphore and brightness or gray scale;
s203, calibrating the driving voltage of the light emitting device according to the acquired corresponding relation between the signal quantity and the brightness or the gray scale to obtain the corresponding relation between the calibrated brightness or the gray scale and the driving voltage;
s204, the display device is shut down, and the driving voltage is compensated according to the corresponding relation between the calibrated brightness or gray scale and the driving voltage.
In a specific implementation, the display device may further include a compensation unit, and the display device further includes a storage capacitor, and after the display device is turned off, the charge stored on the capacitor may be used to discharge, so as to provide a working voltage for the compensation unit to perform shutdown compensation.
It should be noted that, whether the compensation is on or off, the corresponding relationship between the calibrated brightness or gray scale and the driving current may be obtained, and the driving current may be compensated according to the corresponding relationship between the calibrated brightness or gray scale and the driving current.
The display device provided by the embodiment of the application is as follows: any product or component with display function such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. Other essential components of the display device are those of ordinary skill in the art, and will not be described in detail herein, nor should they be considered as limiting the application.
The embodiment of the application provides a method for preparing a display device, as shown in fig. 11, including:
s301, preparing an electroluminescent display module;
s302, preparing a sensor module, wherein the sensor module comprises a plurality of photosensitive devices;
s303, preparing an optical path selector, wherein the direction selector comprises: the light shielding layer is provided with a plurality of inclined light transmission channels, the included angle between the inclined light transmission channels and the direction vertical to the plane where the display device is positioned is larger than 0, and the photosensitive area of the photosensitive device at least corresponds to one inclined light transmission channel;
s304, attaching the electroluminescent display module, the sensor module and the light path selector; the light path selector is located between the electroluminescent display module and the sensor module, and the sensor module is located at one side away from the display surface of the electroluminescent display module.
According to the preparation method of the display device, the direction selector is arranged between the sensor module and the electroluminescent display module, the direction selector is provided with the inclined light-transmitting channel, the included angle between the inclined light-transmitting channel and the plane direction of the display device is larger than 0, and therefore ambient light entering the display device can be prevented from reaching the sensor module through the light-transmitting inclined channel, and interference of the ambient light to the photosensitive device is avoided.
In some embodiments, the optical path selector is prepared, specifically comprising:
as shown in fig. 12, a plurality of optical fibers 46 are mixed with a light-absorbing base material 47 to obtain an optical fiber bundle;
cutting the optical fiber bundle to obtain the optical path selector, wherein, as shown in fig. 12, an included angle θ3 between a straight line 48 where a cutting extending direction is located and a direction where the optical fiber extends is greater than 0 degrees and less than 90 degrees.
In some embodiments, the optical path selector is prepared, specifically comprising:
providing a substrate, and alternately forming a shading sub-layer and a light transmission sub-layer on the substrate;
wherein, form and hide the sub-layer, specifically include:
coating a shading material to form a shading sub-layer;
adopting a patterning process to treat the shading sub-layer to form a light hole; wherein, the light holes in two adjacent layers of the shading sublayers overlap at the orthographic projection part of the plane where the display device is positioned; and in the adjacent two layers of the shading sublayers, the light holes in the shading sublayers close to the electroluminescent display module are offset by a preset distance along a first direction compared with the light holes in the shading sublayers close to the sensor module.
In the implementation, for the scheme that one photosensitive sensor corresponds to a plurality of inclined light transmission channels, even if the distances among the inclined light transmission channels are not identical, a shading sub-layer is formed, and a light hole can be formed at a required position by performing a simple patterning process on the shading sub-layer, so that the difficulty of the preparation process of the optical path selector is not increased.
In some embodiments, the substrate on which the light shielding sub-layer is fabricated may be a fabricated sensor module, that is, the light shielding sub-layer and the light transmitting sub-layer are fabricated directly on the sensor module alternately, so that a bonding process between the sensor module and the optical path selector may be saved, and cost may be saved.
In some embodiments, an electroluminescent display module is prepared, specifically including: a light shielding conductive layer, a buffer layer, an active layer, a gate insulating layer, a gate layer, an interlayer insulating layer, a source-drain electrode layer, a planarization layer, an anode, a pixel definition layer, a light emitting function layer, a cathode, and a packaging layer are sequentially formed on the second substrate.
In some embodiments, preparing a sensor module, specifically includes: a gate electrode, a gate insulating layer, an active layer, a source/drain electrode layer, a first passivation layer, a first electrode, a photoelectric conversion layer, a second electrode, a sidewall protection layer, a resin layer, a second passivation layer, a bias line 42, and an insulating protection layer of a driving circuit are sequentially formed over the first substrate.
In summary, according to the display device and the manufacturing method thereof provided by the embodiments of the present application, the direction selector is disposed between the sensor module and the electroluminescent display module, the direction selector has the inclined light-transmitting channel, and the included angle between the inclined light-transmitting channel and the plane direction of the display device is greater than 0, so that ambient light entering the display device can be prevented from reaching the sensor module through the light-transmitting inclined channel, and interference of the ambient light on the photosensitive device is avoided.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.
Claims (9)
1. A display device, characterized in that the display device comprises: the light path selector is positioned between the electroluminescent display module and the sensor module;
the optical path selector includes: the shading layer is provided with a plurality of inclined light transmission channels, and the included angle between the inclined light transmission channels and the direction vertical to the plane where the display device is positioned is larger than 0;
the sensor module comprises a plurality of photosensitive devices, and the photosensitive areas of the photosensitive devices at least correspond to one inclined light transmission channel;
the optical path selector includes: a plurality of light shielding sub-layers and a plurality of light transmitting sub-layers alternately stacked;
each shading sub-layer is provided with a plurality of light holes, the number of the light holes in each shading sub-layer is the same, and the light holes in different shading sub-layers form the inclined light transmission channel;
the light holes in two adjacent light shielding sublayers overlap at the orthographic projection part of the plane where the display device is located; and in the adjacent two layers of the shading sublayers, the light holes in the shading sublayers close to the electroluminescent display module are offset by a preset distance along a first direction compared with the light holes in the shading sublayers close to the sensor module.
2. The display device according to claim 1, wherein the light shielding layer includes: and the light absorption substrate, and the inclined light transmission channel comprises an optical fiber.
3. The display device of claim 1, wherein the angle between the light passing through the inclined light transmission channel and the plane of the display device is in the range of 42 ° to 70 °.
4. The display apparatus of claim 1, wherein the electroluminescent display module comprises a plurality of light emitting devices;
the light emitting devices are in one-to-one correspondence with the photosensitive devices; alternatively, each of the photosensitive devices corresponds to a plurality of the light emitting devices.
5. The display device according to claim 4, wherein the light-emitting device comprises an anode, a light-emitting functional layer, and a cathode which are stacked in this order;
the surface of the electroluminescent display module close to the anode is the display surface;
the cathode includes: a light-transmitting electrode and a shading electrode positioned on one side of the light-transmitting electrode away from the light-emitting functional layer; the shading electrode is provided with a first via hole penetrating through the thickness of the shading electrode, and the orthographic projection of the first via hole on the substrate falls into a light-emitting area of the light-emitting device; or,
the material of the cathode comprises magnesium-silver alloy.
6. The display device according to claim 4, wherein the light-emitting device comprises an anode, a light-emitting functional layer, and a cathode which are stacked in this order;
the surface of the electroluminescent display module close to the cathode is the display surface;
the cathode includes a light transmissive material;
the anode includes a stacked first sub-electrode, a second sub-electrode, and a third sub-electrode;
the first sub-electrode and the third sub-electrode comprise light-transmitting materials, and the material of the second sub-electrode comprises magnesium-silver alloy;
the electroluminescent display module further comprises: a substrate positioned on a side of the anode facing away from the light-emitting functional layer; the substrate is provided with a light-transmitting area in an area corresponding to the light-emitting area of the light-emitting device.
7. A method of manufacturing a display device according to any one of claims 1 to 6, characterized in that the method comprises:
preparing an electroluminescent display module;
preparing a sensor module, wherein the sensor module comprises a plurality of photosensitive devices;
preparing an optical path selector, wherein the optical path selector comprises: the light shielding layer is provided with a plurality of inclined light transmission channels, the included angle between the inclined light transmission channels and the direction vertical to the plane where the display device is positioned is larger than 0, and the photosensitive area of the photosensitive device at least corresponds to one inclined light transmission channel;
attaching the electroluminescent display module, the sensor module and the optical path selector; the light path selector is located between the electroluminescent display module and the sensor module, and the sensor module is located at one side away from the display surface of the electroluminescent display module.
8. The method of claim 7, wherein preparing the optical path selector comprises:
mixing a plurality of optical fibers with a light absorbing substrate to obtain an optical fiber bundle;
and cutting the optical fiber bundle to obtain the optical path selector, wherein an included angle between the cutting extending direction and the extending direction of the optical fiber is more than 0 degrees and less than 90 degrees.
9. The method of claim 7, wherein preparing the optical path selector comprises:
providing a substrate, and alternately forming a shading sub-layer and a light transmission sub-layer on the substrate;
wherein, form and hide the sub-layer, specifically include:
coating a shading material to form a shading sub-layer;
adopting a patterning process to treat the shading sub-layer to form a light hole; wherein, the light holes in two adjacent layers of the shading sublayers overlap at the orthographic projection part of the plane where the display device is positioned; and in the adjacent two layers of the shading sublayers, the light holes in the shading sublayers close to the electroluminescent display module are offset by a preset distance along a first direction compared with the light holes in the shading sublayers close to the sensor module.
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