CN113252314A - Optical detection device, method and display device - Google Patents
Optical detection device, method and display device Download PDFInfo
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- CN113252314A CN113252314A CN202110535692.XA CN202110535692A CN113252314A CN 113252314 A CN113252314 A CN 113252314A CN 202110535692 A CN202110535692 A CN 202110535692A CN 113252314 A CN113252314 A CN 113252314A
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Abstract
An optical detection device, method and display device are disclosed. The optical detection device includes: the device comprises a light coupling and transmission module, a photoelectric detection module and a control module; the light coupling and transmission module comprises a plurality of light coupling and transmission units, and any one of the light coupling and transmission units is configured to collect and filter the light signals emitted by the pixel units through the grating structure, obtain the light signals with the target wavelength and couple the light signals into the waveguide structure to be transmitted to the photoelectric detection module; the photoelectric detection module is configured to measure the intensity of the received optical signal, convert the intensity into an electric signal and output the electric signal to the control module; and the control module is configured to process the received electric signals to obtain the light-emitting brightness information of the pixel unit. The technical scheme can accurately detect the brightness change of the pixel units corresponding to each area of the screen, and provides comprehensive and accurate compensation basis for the compensation of the screen brightness.
Description
Technical Field
The present disclosure relates to, but not limited to, the field of display technologies, and in particular, to an optical detection device, an optical detection method, and a display device.
Background
With the development of display technology, OLED (Organic Light-Emitting Diode) products have been rapidly developed due to advantages of self-luminescence, high brightness, wide viewing angle, and the like.
However, as the service time of the OLED product increases, the luminous efficiency of the material becomes lower, so that the product life is shortened. Moreover, due to the limitation of the process, the luminance of different pixels of the OLED product is not uniform enough, which limits the development of the OLED display technology.
Disclosure of Invention
In a first aspect, the present disclosure provides an optical detection apparatus comprising: the device comprises a light coupling and transmission module, a photoelectric detection module and a control module;
the light coupling and transmission module comprises a plurality of light coupling and transmission units, and any one of the light coupling and transmission units is configured to collect and filter the light signals emitted by the pixel units through the grating structure, obtain the light signals with the target wavelength and couple the light signals into the waveguide structure to be transmitted to the photoelectric detection module;
the photoelectric detection module is configured to measure the intensity of the received optical signal, convert the intensity into an electric signal and output the electric signal to the control module;
and the control module is configured to process the received electric signals to obtain the light-emitting brightness information of the pixel unit.
In a second aspect, the present disclosure provides an optical detection method comprising:
the light coupling and transmission unit collects the optical signals sent by the pixel unit through the grating structure and filters the optical signals to obtain optical signals with target wavelength, and the optical signals are coupled into the waveguide structure and transmitted to the photoelectric detection module;
the photoelectric detection module measures the intensity of the received optical signal, converts the intensity into an electric signal and outputs the electric signal to the control module;
the control module processes the received electric signals to obtain the light-emitting brightness information of the pixel unit.
In a third aspect, the present disclosure provides a display device comprising the above optical detection device.
The optical detection device, the optical detection method and the display device provided by the embodiment of the disclosure are characterized in that the light coupling and transmission module comprises a plurality of light coupling and transmission units, any one of the light coupling and transmission units collects optical signals emitted by the pixel units through the grating structure and filters the optical signals to obtain optical signals with target wavelengths, the optical signals are coupled into the waveguide structure and transmitted to the photoelectric detection module, the photoelectric detection module measures the intensity of the received optical signals and converts the optical signals into electric signals to be output to the control module, and the control module processes the received electric signals to obtain the luminous brightness information of the pixel units. The optical detection device and the optical detection method can accurately detect the brightness change of the pixel units corresponding to each area of the screen, and provide comprehensive and accurate compensation basis for the compensation of the screen brightness.
Drawings
The accompanying drawings are included to provide an understanding of the disclosed embodiments and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the examples serve to explain the principles of the disclosure and not to limit the disclosure.
Fig. 1 is a schematic structural diagram of an optical detection apparatus according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a light coupling and transmitting module according to an embodiment of the disclosure;
fig. 3 is a schematic diagram of a bevel microstructure according to an embodiment of the disclosure;
fig. 4-a is a schematic structural diagram of a light coupling and transmission module according to an embodiment of the disclosure;
fig. 4-b is a schematic structural diagram of another light coupling and transmission module according to an embodiment of the disclosure;
fig. 4-c is a schematic structural diagram of another light coupling and transmission module according to an embodiment of the disclosure;
fig. 5-a is a schematic structural diagram of a photodetection module according to an embodiment of the present disclosure;
fig. 5-b is a schematic structural diagram of another photodetection module provided in the embodiment of the present disclosure;
fig. 5-c is a schematic structural diagram of another photodetection module provided in the embodiment of the present disclosure;
fig. 6 is a flowchart of an optical detection method according to an embodiment of the disclosure.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. Note that the embodiments may be implemented in a plurality of different forms. Those skilled in the art can readily appreciate the fact that the forms and details may be varied into a variety of forms without departing from the spirit and scope of the present disclosure. Therefore, the present disclosure should not be construed as being limited to the contents described in the following embodiments. The embodiments and features of the embodiments in the present disclosure may be arbitrarily combined with each other without conflict.
In the drawings, the size of each component, the thickness of layers, or regions may be exaggerated for clarity. Therefore, one aspect of the present disclosure is not necessarily limited to the dimensions, and the shapes and sizes of the respective components in the drawings do not reflect a true scale. Further, the drawings schematically show ideal examples, and one embodiment of the present disclosure is not limited to the shapes, numerical values, and the like shown in the drawings.
The ordinal numbers such as "first", "second", "third", and the like in the present specification are provided for avoiding confusion among the constituent elements, and are not limited in number.
In this specification, the terms "mounted," "connected," and "connected" are to be construed broadly unless otherwise specifically indicated and limited. For example, it may be a fixed connection, or a removable connection, or an integral connection; can be a mechanical connection, or an electrical connection; either directly or indirectly through intervening components, or both may be interconnected. The specific meaning of the above terms in the present disclosure can be understood in specific instances by those of ordinary skill in the art.
In the present specification, "film" and "layer" may be interchanged with each other. For example, the "conductive layer" may be sometimes replaced with a "conductive film". Similarly, the "insulating film" may be replaced with an "insulating layer".
"about" in this disclosure means that the limits are not strictly defined, and that the numerical values are within the tolerances allowed for the process and measurement.
The embodiment of the present disclosure provides an optical detection apparatus, as shown in fig. 1, the optical detection apparatus provided by the embodiment of the present disclosure includes: the system comprises a light coupling and transmission module 1, a photoelectric detection module 2 and a control module 3;
the light coupling and transmission module comprises a plurality of light coupling and transmission units, and any one of the light coupling and transmission units is configured to collect and filter the light signals emitted by the pixel units through the grating structure, obtain the light signals with the target wavelength and couple the light signals into the waveguide structure to be transmitted to the photoelectric detection module;
the photoelectric detection module is configured to measure the intensity of the received optical signal, convert the intensity into an electric signal and output the electric signal to the control module;
and the control module is configured to process the received electric signals to obtain the light-emitting brightness information of the pixel unit.
The optical detection device provided by the embodiment of the present disclosure, the light coupling and transmission module includes a plurality of light coupling and transmission units, any one of the light coupling and transmission units collects the optical signal emitted by the pixel unit through the grating structure and performs filtering to obtain an optical signal with a target wavelength, and couples the optical signal into the waveguide structure to transmit the optical signal to the photoelectric detection module, the photoelectric detection module measures the intensity of the received optical signal and converts the optical signal into an electrical signal to output the electrical signal to the control module, and the control module processes the received electrical signal to obtain the luminance information of the pixel unit. The optical detection device can accurately detect the brightness change of the pixel units corresponding to each area of the screen, and provides comprehensive and accurate compensation basis for the compensation of the screen brightness.
As shown in fig. 2, in some exemplary embodiments, the light coupling and transmitting unit 10 includes a waveguide structure 102 and a grating structure 104 disposed on the waveguide structure;
the waveguide structure 102 comprises a first dielectric layer 1021, a second dielectric layer 1022 and a third dielectric layer 1023 which are sequentially stacked; and, n2< n1< n 3; n1 is the refractive index of the first dielectric layer, n2 is the refractive index of the second dielectric layer, n3 is the refractive index of the third dielectric layer;
the grating structure is arranged on the surface of the third medium layer far away from the first medium layer, and the material of the grating structure is the same as that of the third medium layer.
When light emitted by the pixel unit is incident from the surface, far away from the first medium layer, of the third medium layer, due to the existence of the grating structure, light with other wavelengths except the target wavelength can be attenuated, and only light with the target wavelength can be incident to the surface, far away from the first medium layer, of the second medium layer through the grating. Since the refractive index of the second medium layer is smaller than those of the third medium layer and the first medium layer, light of a target wavelength can be mostly confined in the second medium layer for transmission. The grating structure is utilized to obtain the optical signal with single wavelength (target wavelength), and the interference among the optical signals with various wavelengths can be avoided during the transmission of the optical signal with single wavelength, so that the actual change condition of the light source brightness can be reflected truly, and the accurate extraction of the brightness information is facilitated. The optical signal with single wavelength is convenient for the photoelectric detection module to detect, so that the detection speed is increased, and the photoelectric detection efficiency is improved.
In some exemplary embodiments, the grating structure may be formed by etching at a surface of the third dielectric layer remote from the first dielectric layer.
In some exemplary embodiments, the grating structure is a planar grating comprising periodically arranged concave and convex surfaces.
As shown in fig. 3, a plurality of inclined microstructures are formed on the surface of the second dielectric layer away from the first dielectric layer. In order to reduce the reflection times of the light with the target wavelength on the surface of the second medium layer far away from the first medium layer, a slope microstructure (wedge-shaped microstructure) can be formed on the contact surface of the grating and the optical waveguide through anisotropic etching.
In some exemplary embodiments, the first dielectric layer is a silicon nitride (SiNx) layer or a silicon Oxide (SiNx) layer, the second dielectric layer is an Indium-Tin Oxide (ITO) layer, and the third dielectric layer is a Passivation layer (PVX). The refractive index n1 of the first dielectric layer is about 3< n1<4, the refractive index n2 of the second dielectric layer is about 1.2< n2<1.8, and the refractive index n3 of the third dielectric layer is about 6< n3< 7. When the thickness of the film layer of the waveguide structure is in the range of tens to hundreds of nanometers, the refractive index difference between the three film layers enables most of the light of the target wavelength to be transmitted in the middle film layer (second medium layer) with the minimum refractive index.
As shown in fig. 4-a, in some exemplary embodiments, the light coupling and transmitting module includes: n first waveguide lines W1(j) and M × N first gratings G1(i, j); m is the total number of grid lines S (i) corresponding to all pixel units P (i, j) in the panel, and N is the total number of data lines D (j) corresponding to all pixel units P (i, j) in the panel; i is more than or equal to 1 and less than or equal to M, and j is more than or equal to 1 and less than or equal to N;
any one first waveguide line W1(j) is arranged at one side of the corresponding data line D (j) far away from the substrate, and the orthographic projection of the data line D (j) on the substrate covers the orthographic projection of the first waveguide line W1(j) on the substrate;
any one of the first gratings G1(i, j) is disposed in one-to-one correspondence with the corresponding pixel cell P (i, j).
As shown in fig. 4-b, in some exemplary embodiments, the light coupling and transmitting module includes: m second waveguide lines W2(i) and M × N second gratings G2(i, j); m is the total number of grid lines S (i) corresponding to all pixel units P (i, j) in the panel, and N is the total number of data lines D (j) corresponding to all pixel units P (i, j) in the panel; i is more than or equal to 1 and less than or equal to M, and j is more than or equal to 1 and less than or equal to N;
any one second waveguide line W2(i) is arranged at one side of the corresponding grid line s (i) far away from the substrate, and the orthographic projection of the grid line s (i) on the substrate covers the orthographic projection of the second waveguide line W2(i) on the substrate;
any one of the second gratings G2(i, j) is disposed in one-to-one correspondence with the corresponding pixel cell P (i, j).
As shown in fig. 4-c, in some exemplary embodiments, the light coupling and transmitting module includes: n first waveguides W1(j), M second waveguides W2(i), M × N first gratings G1(i, j), and M × N second gratings G2(i, j); m is the total number of grid lines S (i) corresponding to all pixel units P (i, j) in the panel, and N is the total number of data lines D (j) corresponding to all pixel units P (i, j) in the panel; i is more than or equal to 1 and less than or equal to M, and j is more than or equal to 1 and less than or equal to N;
any one first waveguide line W1(j) is arranged at one side of the corresponding data line D (j) far away from the substrate, and the orthographic projection of the data line D (j) on the substrate covers the orthographic projection of the first waveguide line W1(j) on the substrate;
any one second waveguide line W2(i) is arranged at one side of the corresponding grid line s (i) far away from the substrate, and the orthographic projection of the grid line s (i) on the substrate covers the orthographic projection of the second waveguide line W2(i) on the substrate;
any one of the first gratings G1(i, j) is disposed in one-to-one correspondence with the corresponding pixel cell P (i, j), and any one of the second gratings G2(i, j) is disposed in one-to-one correspondence with the corresponding pixel cell P (i, j).
The first grating and the first waveguide line are arranged above the data line (the side of the data line far away from the substrate), and can collect incident light in some directions; the second grating and the second waveguide line are arranged above the grid line (the side of the grid line far away from the substrate), and can collect incident light in other directions. And the first grating and the second grating, the first waveguide line and the second waveguide line are used for collecting more incident light, so that the photoelectric detection precision is improved.
The first waveguide line is arranged above the data line, and the second waveguide line is arranged above the grid line, so that the arrangement of the light coupling and transmission unit does not influence the aperture opening ratio of the pixel unit.
As shown in fig. 5-a, in some exemplary embodiments, the photodetection module includes: a first waveguide lead WY1, a first photodetector T1, and a first circuit lead E1;
the first waveguide lead WY1 is connected with N first waveguide lines W1(j) and connected with the input end of a first photodetector T1;
the output terminal of the first photodetector T1 is connected to the first terminal of the first circuit lead E1, and the second terminal of the first circuit lead E1 is connected to the control module as the output terminal of the photodetector module.
When the light coupling and transmission module only comprises the first waveguide line and the first grating, the photoelectric detection module can be connected with the light coupling and transmission module through the first waveguide lead and is connected with the control module through the first circuit lead.
As shown in fig. 5-b, in some exemplary embodiments, the photodetection module includes: a second waveguide lead WY2, a second photodetector T2, and a second circuit lead E2;
the second waveguide lead WY2 is connected with M second waveguide lines W2(i) and connected with the input end of a second photodetector T2;
the output terminal of the second photodetector T2 is connected to the first terminal of the second circuit lead E2, and the second terminal of the second circuit lead E2 is connected to the control module as the output terminal of the photodetector module.
When the light coupling and transmission module only comprises the second waveguide line and the second grating, the photoelectric detection module can be connected with the light coupling and transmission module through the second waveguide lead and is connected with the control module through the second circuit lead.
As shown in fig. 5-c, in some exemplary embodiments, the photodetection module includes: a first waveguide lead WY1, a first photodetector T1, a first circuit lead E1, a second waveguide lead WY2, a second photodetector T2, and a second circuit lead E2;
the first waveguide lead WY1 is connected with N first waveguide lines W1(j) and connected with the input end of a first photodetector T1; the output end of the first photoelectric detector T1 is connected with the first end of a first circuit lead E1, and the second end of the first circuit lead E1 is used as the first output end of the photoelectric detection module and is connected with the control module;
the second waveguide lead WY2 is connected with M second waveguide lines W2(i) and connected with the input end of a second photodetector T2; the output terminal of the second photodetector T2 is connected to the first terminal of the second circuit lead E2, and the second terminal of the second circuit lead E2 is connected to the control module as the second output terminal of the photodetector module.
When the light coupling and transmission module comprises a first waveguide line, a first grating, a second waveguide line and a second grating, the photoelectric detection module can be connected with the light coupling and transmission module through the first waveguide line and a second waveguide lead, and is connected with the control module through a second circuit lead and a second circuit lead.
In some exemplary embodiments, the first waveguide lead and the second waveguide lead have the same film layer structure as the waveguide structure.
The first photoelectric detector and the second photoelectric detector are used for measuring the intensity of the received optical signal and converting the intensity into an electric signal to be output.
In some exemplary embodiments, the control module is further configured to divide all the pixel units into a group in advance, control the screen to sequentially display a plurality of images with different gray scales, and light up the screen in a time-sharing and area-dividing manner by the group a of pixel units when the screen displays any image with any gray scale; a is more than or equal to 1 and less than or equal to M N, M is the total number of grid lines corresponding to all pixel units in the panel, and N is the total number of data lines corresponding to all pixel units in the panel.
In some exemplary embodiments, the control module is further configured to obtain brightness value information of the group a pixel units by the photodetection module in time-sharing and regional manner when the control screen displays an image of any one gray scale; and averaging the acquired brightness values of all the pixel units, comparing the brightness value of each group of pixel units with the average value to obtain the brightness difference value of the group of pixel units, and determining the brightness compensation value of the group of pixel units under the gray scale according to the brightness difference value.
In some exemplary embodiments, the control module is further configured to periodically acquire and store luminance value information of each group of pixel units at a predetermined gray scale; comparing whether the current period brightness value and the first period brightness value of any group of pixel units under the preset gray scale exist difference, and if so, determining the brightness compensation value of the group of pixel units under the preset gray scale by taking the first period brightness value as a target value.
In some exemplary embodiments, the control module is further configured to, when a target pixel unit is controlled to display an image of a target gray scale, determine a brightness compensation value of the group of pixel units at the target gray scale according to a group in which the pixel unit is located, and adjust a driving signal of the pixel unit according to the brightness compensation value to compensate for display brightness of a screen area in which the pixel unit is located.
The optical detection device can acquire the brightness information of all the pixel units under each gray scale, and the brightness compensation value of each screen area is determined through the difference between the local pixel unit brightness and the whole pixel unit brightness mean value, so that the uniformity of the screen brightness is improved. The optical detection device can regularly acquire and store the brightness value information of each group of pixel units under the preset gray scale, and the brightness deviation caused by the aging of the light source can be corrected by comparing whether the current-stage brightness value and the first-stage brightness value of the pixel units under the preset gray scale are different.
The embodiment of the present disclosure provides an optical detection method, as shown in fig. 6, the optical detection method provided by the embodiment of the present disclosure includes:
step S10: the light coupling and transmission unit collects the optical signals sent by the pixel unit through the grating structure and filters the optical signals to obtain optical signals with target wavelength, and the optical signals are coupled into the waveguide structure and transmitted to the photoelectric detection module;
step S20: the photoelectric detection module measures the intensity of the received optical signal, converts the intensity into an electric signal and outputs the electric signal to the control module;
step S30: the control module processes the received electric signals to obtain the light-emitting brightness information of the pixel unit.
In the optical detection method provided by the embodiment of the disclosure, the light coupling and transmission unit collects and filters the optical signal emitted by the pixel unit through the grating structure to obtain the optical signal with the target wavelength, and couples the optical signal into the waveguide structure to be transmitted to the photoelectric detection module, the photoelectric detection module measures the intensity of the received optical signal and converts the intensity of the received optical signal into an electrical signal to be output to the control module, and the control module processes the received electrical signal to obtain the luminance information of the pixel unit. The optical detection method can accurately detect the brightness change of each area of the screen, and provides a comprehensive and accurate compensation basis for the compensation of the screen brightness.
In some exemplary embodiments, the method further comprises: the control module divides all pixel units into a group a in advance, controls the screen to sequentially display a plurality of images with different gray scales, and lights the screen in different areas at different times by the group a of pixel units when the screen displays any image with any gray scale; a is more than or equal to 1 and less than or equal to M N, M is the total number of grid lines corresponding to all pixel units in the panel, and N is the total number of data lines corresponding to all pixel units in the panel.
In some exemplary embodiments, the method further comprises: when the control module controls the screen to display an image of any gray scale, the brightness value information of the group a of pixel units is acquired in a time-sharing and regional mode through the photoelectric detection module; and averaging the acquired brightness values of all the pixel units, comparing the brightness value of each group of pixel units with the average value to obtain the brightness difference value of the group of pixel units, and determining the brightness compensation value of the group of pixel units under the gray scale according to the brightness difference value.
In some exemplary embodiments, the method further comprises: the control module regularly acquires and stores the brightness value information of each group of pixel units under the preset gray scale; comparing whether the current period brightness value and the first period brightness value of any group of pixel units under the preset gray scale exist difference, and if so, determining the brightness compensation value of the group of pixel units under the preset gray scale by taking the first period brightness value as a target value.
In some exemplary embodiments, the method further comprises: when the control module controls the target pixel unit to display the image of the target gray scale, the control module determines the brightness compensation value of the group of pixel units under the target gray scale according to the group where the pixel units are located, and adjusts the driving signal of the pixel unit according to the brightness compensation value so as to compensate the display brightness of the screen area where the pixel unit is located.
The optical detection method can acquire the brightness information of all the pixel units under each gray scale, and the brightness compensation value of each screen area is determined through the difference between the local pixel unit brightness and the whole pixel unit brightness mean value, so that the uniformity of the screen brightness is improved. The optical detection device can regularly acquire and store the brightness value information of each group of pixel units under the preset gray scale, and the brightness deviation caused by the aging of the light source can be corrected by comparing whether the current-stage brightness value and the first-stage brightness value of the pixel units under the preset gray scale are different.
The embodiment of the application also provides a display device which comprises the optical detection device.
The display device may be an Organic Light Emitting Diode (OLED) display device or a Quantum-dot Light Emitting Diode (QLED) display device. The display device may be: the display device comprises any product or component with a display function, such as a mobile phone, a tablet personal computer, a television, a display, a notebook computer, a digital photo frame, a navigator, Augmented Reality (AR), Virtual Reality (VR), and the like. Other essential components of the display device are understood by those skilled in the art, and are not described herein or should not be construed as limiting the invention.
Although the embodiments disclosed in the present application are described above, the descriptions are only for the convenience of understanding the present application, and are not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (15)
1. An optical inspection device comprising: the device comprises a light coupling and transmission module, a photoelectric detection module and a control module;
the light coupling and transmission module comprises a plurality of light coupling and transmission units, and any one of the light coupling and transmission units is configured to collect and filter the light signals emitted by the pixel units through the grating structure, obtain the light signals with the target wavelength and couple the light signals into the waveguide structure to be transmitted to the photoelectric detection module;
the photoelectric detection module is configured to measure the intensity of the received optical signal, convert the intensity into an electric signal and output the electric signal to the control module;
and the control module is configured to process the received electric signals to obtain the light-emitting brightness information of the pixel unit.
2. The optical inspection device of claim 1, wherein:
the light coupling and transmission unit comprises a waveguide structure and a grating structure arranged on the waveguide structure;
the waveguide structure comprises a first dielectric layer, a second dielectric layer and a third dielectric layer which are sequentially overlapped; and, n2< n1< n 3; n1 is the refractive index of the first dielectric layer, n2 is the refractive index of the second dielectric layer, n3 is the refractive index of the third dielectric layer;
the grating structure is arranged on the surface of the third medium layer far away from the first medium layer, and the material of the grating structure is the same as that of the third medium layer.
3. The optical detection device according to claim 2, characterized in that:
the grating structure is formed by etching the surface of the third dielectric layer far away from the first dielectric layer.
4. The optical detection device according to claim 2, characterized in that:
and a plurality of inclined plane microstructures are formed on the surface of the second dielectric layer far away from the first dielectric layer.
5. The optical detection device according to claim 2, characterized in that:
the first dielectric layer is a silicon nitride layer or a silicon oxide layer, the second dielectric layer is an indium tin oxide layer, and the third dielectric layer is a passivation layer.
6. An optical detection device according to any one of claims 1-5, wherein:
the light coupling and transmission module comprises: n first waveguides W1(j) and M × N first gratings G1(i, j), and/or M second waveguides W2(i) and M × N second gratings G2(i, j);
the first waveguide line W1(j) is disposed at a side of the corresponding data line d (j) away from the substrate, and the second waveguide line W2(i) is disposed at a side of the corresponding gate line s (i) away from the substrate;
any one of the first gratings G1(i, j) is disposed in one-to-one correspondence with the corresponding pixel unit P (i, j); any one of the second gratings G2(i, j) is disposed in one-to-one correspondence with the corresponding pixel unit P (i, j);
wherein, M is the total number of the gate lines s (i) corresponding to all the pixel units P (i, j) in the panel, and N is the total number of the data lines d (j) corresponding to all the pixel units P (i, j) in the panel; i is more than or equal to 1 and less than or equal to M, and j is more than or equal to 1 and less than or equal to N.
7. The optical inspection device of claim 6, wherein:
the orthographic projection of the data line D (j) on the substrate covers the orthographic projection of the first waveguide line W1(j) on the substrate; the orthographic projection of the grid line s (i) on the substrate covers the orthographic projection of the second waveguide line W2(i) on the substrate.
8. The optical inspection device of claim 6, wherein:
the photodetection module includes: a first waveguide lead, a first photodetector and a first circuit lead, and/or a second waveguide lead, a second photodetector and a second circuit lead;
the first waveguide lead is connected with the N first waveguide lines and connected with the input end of the first photoelectric detector; the output end of the first photoelectric detector is connected with the first end of the first circuit lead, and the second end of the first circuit lead is used as the first output end of the photoelectric detection module and is connected with the control module;
the second waveguide lead is connected with the M second waveguide lines and connected with the input end of the second photoelectric detector; the output end of the second photoelectric detector is connected with the first end of the second circuit lead, and the second end of the second circuit lead is used as the second output end of the photoelectric detection module and is connected with the control module.
9. The optical inspection device of claim 1, wherein:
the control module is also configured to divide all the pixel units into a group a in advance, control the screen to sequentially display images with a plurality of different gray scales, and light the screen in a time-sharing and area-dividing manner by the group a of pixel units when the screen displays any image with any gray scale; a is more than or equal to 1 and less than or equal to M N, M is the total number of grid lines corresponding to all pixel units in the panel, and N is the total number of data lines corresponding to all pixel units in the panel.
10. An optical inspection method for use in the optical inspection device of any one of claims 1-9, comprising:
the light coupling and transmission unit collects the optical signals sent by the pixel unit through the grating structure and filters the optical signals to obtain optical signals with target wavelength, and the optical signals are coupled into the waveguide structure and transmitted to the photoelectric detection module;
the photoelectric detection module measures the intensity of the received optical signal, converts the intensity into an electric signal and outputs the electric signal to the control module;
the control module processes the received electric signals to obtain the light-emitting brightness information of the pixel unit.
11. The optical inspection method of claim 10, wherein:
the method further comprises the following steps: the control module divides all pixel units into a group a in advance, controls the screen to sequentially display a plurality of images with different gray scales, and lights the screen in different areas at different times by the group a of pixel units when the screen displays any image with any gray scale; a is more than or equal to 1 and less than or equal to M N, M is the total number of grid lines corresponding to all pixel units in the panel, and N is the total number of data lines corresponding to all pixel units in the panel.
12. The optical inspection method of claim 11, wherein:
the method further comprises the following steps: when the control module controls the screen to display an image of any gray scale, the brightness value information of the group a of pixel units is acquired in a time-sharing and regional mode through the photoelectric detection module; and averaging the acquired brightness values of all the pixel units, comparing the brightness value of each group of pixel units with the average value to obtain the brightness difference value of the group of pixel units, and determining the brightness compensation value of the group of pixel units under the gray scale according to the brightness difference value.
13. The optical inspection method of claim 11, wherein:
the method further comprises the following steps: the control module regularly acquires and stores the brightness value information of each group of pixel units under the preset gray scale; comparing whether the current period brightness value and the first period brightness value of any group of pixel units under the preset gray scale exist difference, and if so, determining the brightness compensation value of the group of pixel units under the preset gray scale by taking the first period brightness value as a target value.
14. The optical detection method according to claim 12 or 13, characterized in that:
the method further comprises the following steps: when the control module controls the target pixel unit to display the image of the target gray scale, the control module determines the brightness compensation value of the group of pixel units under the target gray scale according to the group where the pixel units are located, and adjusts the driving signal of the pixel unit according to the brightness compensation value so as to compensate the display brightness of the screen area where the pixel unit is located.
15. A display device, comprising: an optical detection device according to any one of claims 1 to 9.
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