CN115000204B - Photoelectric detection device and display device - Google Patents
Photoelectric detection device and display device Download PDFInfo
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- CN115000204B CN115000204B CN202210577652.6A CN202210577652A CN115000204B CN 115000204 B CN115000204 B CN 115000204B CN 202210577652 A CN202210577652 A CN 202210577652A CN 115000204 B CN115000204 B CN 115000204B
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- 238000001514 detection method Methods 0.000 title claims abstract description 56
- 239000000758 substrate Substances 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims description 20
- 238000005538 encapsulation Methods 0.000 claims description 18
- 230000000903 blocking effect Effects 0.000 claims description 16
- 239000011159 matrix material Substances 0.000 claims description 16
- 238000004806 packaging method and process Methods 0.000 claims description 4
- 206010070834 Sensitisation Diseases 0.000 description 33
- 230000008313 sensitization Effects 0.000 description 33
- 230000005540 biological transmission Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 239000003086 colorant Substances 0.000 description 4
- 239000011149 active material Substances 0.000 description 3
- 230000008447 perception Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000010259 detection of temperature stimulus Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
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- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
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- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
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- H—ELECTRICITY
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- H01L31/02161—Coatings for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/02162—Coatings for devices characterised by at least one potential jump barrier or surface barrier for filtering or shielding light, e.g. multicolour filters for photodetectors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The application provides a photoelectric detection device and a display device; the photoelectric detection device comprises a substrate, a driving layer and a photosensitive device layer, wherein the driving layer is arranged on one side of the substrate, the photosensitive device layer is arranged on one side of the driving layer away from the substrate, the photoelectric detection device further comprises a shading pattern, the photosensitive device layer comprises a first photosensitive unit and a second photosensitive unit, and the shading pattern is arranged on one side of the second photosensitive unit away from the driving layer. According to the photoelectric detection device, the shading pattern is arranged on one side, away from the driving layer, of the second photosensitive unit, the second photosensitive unit does not sense light, but senses temperature, temperature information sensed by the second photosensitive unit can determine temperature influence of the first photosensitive unit, the first photosensitive unit is correspondingly compensated, and inaccuracy of detection results caused by temperature influence of the photoelectric detector can be avoided.
Description
Technical Field
The application relates to the technical field of sensors, in particular to a photoelectric detection device and a display device.
Background
The photoelectric detector is widely used as a photoelectric sensor in the fields of image sensing, environment monitoring, industrial control, ray detection, biological detection and the like. However, the existing photoelectric detector is sensitive to temperature, and when the temperature changes, the response performance of the photoelectric detector changes, so that the detection result of the photoelectric detector is inaccurate.
Therefore, the existing photoelectric detector has the technical problem that the detection result is inaccurate due to the influence of temperature.
Disclosure of Invention
The embodiment of the application provides a photoelectric detection device and a display device, which are used for relieving the technical problem that the detection result is inaccurate due to the influence of temperature on the existing photoelectric detector.
The embodiment of the application provides a photoelectric detection device, and the photoelectric detection device includes:
a substrate;
the driving layer is arranged on one side of the substrate;
the photosensitive device layer is arranged on one side of the driving layer away from the substrate;
the photoelectric detection device further comprises a shading pattern, the photosensitive device layer comprises a first photosensitive unit and a second photosensitive unit, and the shading pattern is arranged on one side, far away from the driving layer, of the second photosensitive unit.
In some embodiments, the photosensitive device layer includes:
the first electrode layer is arranged on one side of the driving layer away from the substrate;
the photosensitive layer comprises an active layer, and the photosensitive layer is arranged on one side of the first electrode layer far away from the driving layer;
the second electrode layer is arranged on one side of the photosensitive layer, which is far away from the first electrode layer;
the photoelectric detection device further comprises an encapsulation layer, wherein the encapsulation layer is arranged on one side, far away from the photosensitive layer, of the second electrode layer, and the shading pattern is arranged on one side, far away from the second electrode layer, of the encapsulation layer; or the shading pattern is arranged between the packaging layer and the second electrode layer.
In some embodiments, the first light sensing unit includes at least a first red light sensing unit, a first green light sensing unit, and a first blue light sensing unit, and the second light sensing unit is the same as at least one of the first light sensing units.
In some embodiments, the second light sensing unit includes a second red light sensing unit, a second green light sensing unit, and a second blue light sensing unit, the second red light sensing unit being the same as the first red light sensing unit in terms of light sensing color, the second green light sensing unit being the same as the first green light sensing unit in terms of light sensing color, and the second blue light sensing unit being the same as the first blue light sensing unit in terms of light sensing color;
the light shielding patterns comprise a first light shielding pattern, a second light shielding pattern and a third light shielding pattern;
the first shading pattern is arranged on one side, far away from the driving layer, of the second red photosensitive unit, the second shading pattern is arranged on one side, far away from the driving layer, of the second green photosensitive unit, and the third shading pattern is arranged on one side, far away from the driving layer, of the second blue photosensitive unit.
In some embodiments, the first red light sensing unit is disposed adjacent to the second red light sensing unit, the first green light sensing unit is disposed adjacent to the second green light sensing unit, and the first blue light sensing unit is disposed adjacent to the second blue light sensing unit.
In some embodiments, the active layer includes a first active portion corresponding to the first light sensing unit and a second active portion corresponding to the second light sensing unit, the first active portion including a first red active portion, a first green active portion, and a first blue active portion, the second active portion being the same material as at least one of the first red active portion, the first green active portion, and the first blue active portion.
In some embodiments, the first light sensing unit includes at least a first red light sensing unit, a first green light sensing unit, and a first blue light sensing unit, and the second light sensing unit is different from any one of the first light sensing units in light sensing color.
In some embodiments, the active layer includes a first active portion corresponding to the first photosensitive cell and a second active portion corresponding to the second photosensitive cell, the first active portion being of a different material than the second active portion.
In some embodiments, the photodetection device further includes a filter layer, where the filter layer is disposed on a side of the encapsulation layer away from the second electrode layer, the filter layer includes a color blocking layer and a black matrix layer, the color blocking layer is disposed corresponding to the first photosensitive unit, and the black matrix layer includes a light shielding pattern.
Meanwhile, an embodiment of the present application provides a display device, which includes a display panel and the photodetection device according to any one of the above embodiments.
The beneficial effects are that: the application provides a photoelectric detection device and a display device; the photoelectric detection device comprises a substrate, a driving layer and a photosensitive device layer, wherein the driving layer is arranged on one side of the substrate, the photosensitive device layer is arranged on one side of the driving layer away from the substrate, the photoelectric detection device further comprises a shading pattern, the photosensitive device layer comprises a first photosensitive unit and a second photosensitive unit, and the shading pattern is arranged on one side of the second photosensitive unit away from the driving layer. According to the photoelectric detection device, the shading pattern is arranged on one side, away from the driving layer, of the second photosensitive unit, the second photosensitive unit does not sense light, but senses temperature, temperature information sensed by the second photosensitive unit can determine temperature influence of the first photosensitive unit, the first photosensitive unit is correspondingly compensated, and inaccuracy of detection results caused by temperature influence of the photoelectric detector can be avoided.
Drawings
Technical solutions and other advantageous effects of the present application will be made apparent from the following detailed description of specific embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a first schematic diagram of a photodetection device according to an embodiment of the present application.
Fig. 2 is a schematic diagram of a photosensitive layer according to an embodiment of the present application.
Fig. 3 is a second schematic diagram of the photoelectric detection device according to the embodiment of the present application.
Fig. 4 is a third schematic diagram of a photodetection device according to an embodiment of the present application.
Fig. 5 is a fourth schematic diagram of a photodetection device according to an embodiment of the present application.
Fig. 6 is a fifth schematic diagram of a photodetection device according to an embodiment of the present application.
Fig. 7 is a sixth schematic diagram of a photodetection device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
In this application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not in themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.
The embodiment of the application provides a photoelectric detection device and a display device for relieving the technical problem that the detection result is inaccurate due to the influence of temperature on the existing photoelectric detector.
As shown in fig. 1, an embodiment of the present application provides a photodetection device, the photodetection device 1 including:
a substrate 11;
a driving layer 12 provided on one side of the substrate 11;
a photosensitive device layer 13 disposed on a side of the driving layer 12 away from the substrate 11;
the photodetection device 1 further includes a light shielding pattern 172, the photosensitive device layer 13 includes a first photosensitive unit 21 and a second photosensitive unit 22, and the light shielding pattern 172 is disposed on a side of the second photosensitive unit 22 away from the driving layer 12.
The embodiment of the application provides a photoelectric detection device, this photoelectric detection device makes the shading pattern set up in one side that the drive layer was kept away from to the second sensitization unit through setting up shading pattern in photoelectric detection device, then the second sensitization unit can not sensitization, but perception temperature, through the temperature information of second sensitization unit perception, can confirm the temperature influence that first sensitization unit received to corresponding first sensitization unit of compensation, thereby can avoid photoelectric detector to receive the temperature influence and lead to the detection result inaccurate.
In one embodiment, as shown in fig. 1, the photosensitive device layer 13 includes:
a first electrode layer 131 disposed on a side of the driving layer 12 away from the substrate 11;
a photosensitive layer 133, the photosensitive layer 133 including an active layer 33, the photosensitive layer 133 being disposed on a side of the first electrode layer 131 remote from the driving layer 12;
a second electrode layer 134 disposed on a side of the photosensitive layer 133 away from the first electrode layer 131;
wherein the photodetector device 1 further comprises an encapsulation layer 15, the encapsulation layer 15 is disposed on a side of the second electrode layer 134 away from the photosensitive layer 133, and the light shielding pattern 172 is disposed on a side of the encapsulation layer 15 away from the second electrode layer 134 (as shown in fig. 1); or the light shielding pattern 172 is disposed between the encapsulation layer 15 and the second electrode layer 134 (as shown in fig. 4).
Specifically, when setting up the shading pattern, can set up the shading pattern in the one side that the encapsulation layer kept away from the second electrode layer, make light unable to shine on the second sensitization unit to make the second sensitization unit can carry out the sensing of temperature as the heat sensing unit, thereby confirm the temperature influence of sensitization unit under this temperature, and compensate first sensitization unit, avoid photoelectric detector to receive the temperature influence to lead to the detection result inaccurate.
The problem that the thickness of the photoelectric detection device is large can be caused by arranging the shading pattern on one side, far away from the second electrode layer, of the packaging layer. The light shielding pattern is arranged between the packaging layer and the second electrode layer, so that the light shielding pattern is flattened by the flattening layer, the thickness of the photoelectric detection device is not required to be increased, and the thickness of the photoelectric detection device is reduced.
In one embodiment, as shown in fig. 1, the first photosensitive unit 21 includes at least a first red photosensitive unit 211, a first green photosensitive unit 212, and a first blue photosensitive unit 213, and the second photosensitive unit 22 has the same photosensitive color as at least one of the first photosensitive units 21. Through making the sensitization colour of at least one sensitization unit in second sensitization unit and the first sensitization unit the same, then when the influence of sensitization unit temperature is felt through the second sensitization unit, the sensitization unit of the same sensitization colour in second sensitization unit and the first sensitization unit receives the same influence of temperature, can directly confirm the influence degree that the first sensitization unit received the temperature through the second sensitization unit, then compensate through the signal of telecommunication, avoid photoelectric detector to receive the influence of temperature to lead to the detection result inaccurate.
In one embodiment, as shown in fig. 1, the second light sensing unit 22 includes a second red light sensing unit 221, a second green light sensing unit 222, and a second blue light sensing unit 223, where the second red light sensing unit 221 is the same as the first red light sensing unit 211, the second green light sensing unit 222 is the same as the first green light sensing unit 212, and the second blue light sensing unit 223 is the same as the first blue light sensing unit 213;
the light shielding pattern 172 includes a first light shielding pattern 172a, a second light shielding pattern 172b, and a third light shielding pattern 172c;
the first light shielding pattern 172a is disposed on a side of the second red light sensing unit 221 away from the driving layer 12, the second light shielding pattern 172b is disposed on a side of the second green light sensing unit 222 away from the driving layer 12, and the third light shielding pattern 172c is disposed on a side of the second blue light sensing unit 223 away from the driving layer 12.
According to the embodiment of the application, the second photosensitive unit comprises a second red photosensitive unit with the same photosensitive color as the first red photosensitive unit, a second green photosensitive unit with the same photosensitive color as the first green photosensitive unit and a second blue photosensitive unit with the same photosensitive color as the first blue photosensitive unit, and a first shading pattern, a second shading pattern and a third shading pattern are respectively arranged on one side, close to external light, of the second red photosensitive unit, the second green photosensitive unit and the second blue photosensitive unit, so that the temperature influence degree of the first red photosensitive unit can be determined through the first shading pattern and the second red photosensitive unit, the compensation data of the first red photosensitive unit are correspondingly determined, the first red photosensitive unit is compensated, the temperature influence degree of the first green photosensitive unit is determined through the second shading pattern and the second green photosensitive unit, and the compensation data of the first green photosensitive unit are correspondingly determined, and the first green photosensitive unit is compensated; the degree that the first blue light sensing unit is affected by temperature is determined through the third shading pattern and the second blue light sensing unit, compensation data of the first blue light sensing unit are correspondingly determined, and the first blue light sensing unit is compensated, so that inaccurate detection results caused by temperature influence of the photoelectric detector are avoided.
Specifically, because the second red light sensing unit, the second green light sensing unit and the second blue light sensing unit are respectively the same as the light sensing colors of the first red light sensing unit, the first green light sensing unit and the first blue light sensing unit, the structures and materials of the light sensing units corresponding to the light sensing units in the first light sensing unit are the same, the degree of temperature influence is determined according to the corresponding light sensing units, the degree of temperature influence on the first light sensing unit can be accurately determined, the required compensation data are correspondingly determined, the first light sensing unit is compensated, and inaccurate detection results caused by temperature influence on the photoelectric detector are avoided.
The larger interval of the photosensitive units aiming at the same photosensitive color can cause different temperatures and inaccurate perception of temperature influence. In one embodiment, as shown in fig. 1, the first red light sensing unit 211 is disposed adjacent to the second red light sensing unit 221, the first green light sensing unit 212 is disposed adjacent to the second green light sensing unit 222, and the first blue light sensing unit 213 is disposed adjacent to the second blue light sensing unit 223. By adjacently arranging the photosensitive units with the same photosensitive color, the temperature difference of the photosensitive units with the same photosensitive color is smaller, and the inaccuracy of the perception of the temperature influence caused by the larger temperature difference of the photosensitive units with the same photosensitive color is avoided.
The above embodiments have been described in detail taking the case where the photosensitive units of the same photosensitive color are adjacently disposed as an example, but the embodiments are not limited thereto, for example, when the temperature difference between the respective portions in the photodetection device is small, or in order to avoid the poor collection effect on the light caused by the large pitch of the photosensitive units of different photosensitive colors, the first photosensitive unit may be disposed separately from each of the second photosensitive units, for example, the first red photosensitive unit, the first green photosensitive unit, and the first blue photosensitive unit in the first photosensitive unit are disposed adjacently, and the second red photosensitive unit, the second green photosensitive unit, and the second blue photosensitive unit in the second photosensitive unit are disposed adjacently.
In one embodiment, as shown in fig. 1 and 2, the active layer 33 includes a first active portion 331 corresponding to the first photosensitive cell 21 and a second active portion 332 corresponding to the second photosensitive cell 22, the first active portion 331 including a first red active portion 331a, a first green active portion 331b, and a first blue active portion 331c, the second active portion 332 being the same material as at least one of the first red active portion 331a, the first green active portion 331b, and the first blue active portion 331 c. Through making the second active portion the same with the material of at least one of first active portion, first green active portion and first blue active portion, then the second sensitization unit is the same with the structure, the material of first sensitization unit, and the temperature influence that the second sensitization unit sensed is the same with the temperature influence that first sensitization unit received, accurately confirm the compensation data of first sensitization unit through the second sensitization unit, avoid photoelectric detector to receive the temperature influence to lead to the detection result inaccurate.
Specifically, as shown in fig. 1, the photosensitive layer 133 includes a red photosensitive portion 133a, a green photosensitive portion 133b, and a blue photosensitive portion 133c, each of which is blocked by the pixel defining layer 132. As shown in fig. 2, the photosensitive layer 133 includes a first transmission layer 31, a first blocking layer 32, an active layer 33, a second blocking layer 34, and a second transmission layer 35, and the first transmission layer, the first blocking layer, the second blocking layer, and the second transmission layer of the red photosensitive portion 133a, the green photosensitive portion 133b, and the blue photosensitive portion 133c are disposed in the same layer, and are disposed separately only for the active layer.
Specifically, as shown in fig. 2, the second active portion 332 includes a second red active portion 332a, a second green active portion 332b, and a second blue active portion 332c, the material of the second red active portion 332a is the same as that of the first red active portion 331a, the material of the second green active portion 332b is the same as that of the first green active portion 331b, and the material of the second blue active portion 332c is the same as that of the first blue active portion 331 c. Because the first transmission layer, the first blocking layer, the second blocking layer and the second transmission layer in each photosensitive unit are arranged on the same layer, the materials of the active parts with the same photosensitive color are the same, and the device structures and the materials of the photosensitive units with the same photosensitive color are the same, so that the degree of temperature influence determined by the photosensitive units with the same photosensitive color is accurate, the temperature influence received by the first photosensitive unit can be accurately compensated, and inaccurate detection results caused by the temperature influence of the photoelectric detector are avoided.
In one embodiment, as shown in fig. 5, the first photosensitive unit 21 includes at least a first red photosensitive unit 211, a first green photosensitive unit 212, and a first blue photosensitive unit 213, and the second photosensitive unit 22 is different from any one of the first photosensitive units 21 in photosensitive color. The second photosensitive unit is different from the first photosensitive unit in photosensitive color, so that the second photosensitive unit can sense the temperature influence degree, the compensation data of the first photosensitive unit are correspondingly determined, the temperature influence of the first photosensitive unit is compensated, and the inaccuracy of detection results caused by the temperature influence of the photoelectric detector is avoided.
In one embodiment, the active layer includes a first active portion corresponding to a first photosensitive cell and a second active portion corresponding to the second photosensitive cell, the first active portion being of a different material than the second active portion. Through making the first active portion of first sensitization unit and the material of the second active portion of second sensitization unit different, then the degree that the second sensitization unit can sense temperature influence, corresponding compensation data of confirm first sensitization unit compensates the temperature influence that first sensitization unit received, avoids photoelectric detector to receive temperature influence to lead to the detection result inaccurate.
Specifically, taking the example that the second photosensitive unit can determine the dark current of the corresponding temperature, when the photosensitive colors of the second photosensitive unit and the first photosensitive unit are different, the temperature at the moment needs to be determined through the curve of the dark current and the temperature of the second photosensitive unit, and then the dark current of the first photosensitive unit is determined through the curve of the temperature and the dark current of the first photosensitive unit, the first photosensitive unit can be compensated according to the magnitude of the dark current, and the inaccuracy of the detection result caused by the influence of the temperature on the photoelectric detector is avoided. For the same photosensitive color of the second photosensitive unit and the first photosensitive unit, as the structure and the color of the second photosensitive unit are the same as those of the first photosensitive unit, the dark current determined by the second photosensitive unit can be directly used as the dark current of the first photosensitive unit, so that the first photosensitive unit is compensated.
Specifically, as shown in fig. 5, the first photosensitive unit 21 further includes a yellow photosensitive unit 214 and a violet photosensitive unit 215, and the photosensitive layer 133 further includes a yellow photosensitive portion 133d, a violet photosensitive portion 133e, and a black photosensitive portion 133f, each of which is blocked by the pixel defining layer 132. It is understood that the first transmission layer, the first blocking layer, the second blocking layer and the second transmission layer of each photosensitive unit are arranged in the same layer, and only the arrangement of the active layers is different, specifically, the active portions of the yellow photosensitive portion, the purple photosensitive portion and the black photosensitive portion are different, so as to sense light rays of different colors.
Specifically, the black light sensing part can adopt different active materials, including the same material as the active material in the first light sensing unit, or can adopt different materials from the active material in the first light sensing unit, and the compensation data of the first light sensing unit are determined through the temperature-dark current curve of each light sensing unit, so that inaccurate detection results caused by temperature influence of the photoelectric detector are avoided.
In one embodiment, as shown in fig. 1, the photo-detecting device 1 further includes a filter layer 17, where the filter layer 17 is disposed on a side of the encapsulation layer 15 away from the second electrode layer 134, the filter layer 17 includes a color blocking layer 171 and a black matrix layer, and the color blocking layer 171 is disposed corresponding to the first photosensitive unit 21, and the black matrix layer includes a light shielding pattern. Through setting up the filter layer in the one side that the second electrode layer was kept away from to the encapsulation layer, then can filter through the look resistive layer, make the photosensitive cell can be accurate produce the electric current according to light to realize photoelectric detection's function, simultaneously, black matrix can form shading pattern and shade, make the second photosensitive cell sense temperature only, and can not exist light to shine the second photosensitive cell, make the second photosensitive cell can confirm the influence of temperature to first photosensitive cell, corresponding compensates first photosensitive cell, avoid photoelectric detector to receive the temperature influence to lead to the detection result inaccurate.
Specifically, as shown in fig. 5, the color blocking layer 171 includes a red color block 171a corresponding to the first red light sensing unit, a green color block 171b corresponding to the first green light sensing unit, a blue color block 171c corresponding to the first blue light sensing unit, a yellow color block 171d corresponding to the yellow light sensing unit, and a violet color block 171e corresponding to the violet light sensing unit, and a black matrix located between adjacent color blocks is used to form a light blocking pattern 172, so that light is filtered through the color blocks, and light received by the second light sensing unit is blocked through the black matrix.
Specifically, as shown in fig. 1, when the second photosensitive unit 22 includes a plurality of photosensitive units, the black matrix may form a plurality of light shielding patterns, for example, the black matrix in fig. 1 may form a first light shielding pattern 172a, a second light shielding pattern 172b, and a third light shielding pattern 172c.
Specifically, since the black matrix overlaps the light shielding pattern in the drawings of the embodiment of the present application, the portion indicated by the light shielding pattern is also a black matrix, for example, the light shielding pattern 172 in fig. 1 is also a black matrix.
Specifically, when the first photosensitive unit senses light, the active layer of each photosensitive unit senses light of a specific wavelength only, so that a filter layer is not required, and only a black matrix is required to be arranged to form a shading pattern to shade the second photosensitive unit. As shown in fig. 3 and 6, the filter layer 17 includes black matrices and a filler layer 173 filled between the black matrices, the black matrices form a light shielding pattern 172 to shield light, and the filler layer may be disposed between the black matrices to planarize.
In particular, forming a light shielding pattern for providing a black matrix causes a problem that the thickness of the photodetecting device is large. As shown in fig. 4 and 7, the photodetector device 1 further includes a first planarization layer 14 and a second planarization layer 16, where the first planarization layer 14 is disposed between the second electrode layer 134 and the encapsulation layer 15, the second planarization layer 16 is disposed between the second electrode layer and the first planarization layer on a side of the encapsulation layer 15 away from the first planarization layer 14, and when the light shielding pattern is disposed, the light shielding pattern is disposed between the second electrode layer and the first planarization layer, so that the thickness of the photodetector device can be prevented from being increased by the light shielding pattern through the planarization performed by the first planarization layer, the second planarization layer and the encapsulation layer.
In one embodiment, as shown in fig. 1, the photo-detecting device 1 further comprises an optical cement 18 and a cover plate 19.
Specifically, the operation of the photodetection device will be described using the same structure and material of the first photosensitive unit and the second photosensitive unit as an example. When the photoelectric detection device is irradiated, determining dark current through the second photosensitive unit, and determining photocurrent through the first photosensitive unit; at the moment, the temperature can be determined by comparing the dark current through the driving chip, and the temperature is displayed; meanwhile, the driving chip can determine the light responsivity according to the light current and the dark current, and then calibrate and output the photosensitive signal according to the light responsivity, so that inaccurate detection results caused by temperature influence of the photoelectric detector are avoided.
Specifically, when the structures of the first photosensitive unit and the second photosensitive unit are the same, but the materials of the active layers of the first photosensitive unit and the second photosensitive unit are different, after the dark current is determined through the second photosensitive unit and the photocurrent is determined through the first photosensitive unit, the temperature is determined according to the temperature-current curve of the second photosensitive unit, then the dark current of the first photosensitive unit is determined according to the temperature and the temperature-current curve of the first photosensitive unit, the photoresponsivity can be determined through the photocurrent and the dark current of the first photosensitive unit, and then the photosensitive signal is calibrated and output according to the photoresponsivity, so that inaccurate detection results caused by temperature influence of a photoelectric detector are avoided.
Meanwhile, an embodiment of the present application provides a display device, which includes a display panel and the photodetection device according to any one of the above embodiments.
As can be seen from the above embodiments:
the embodiment of the application provides a photoelectric detection device and a display device; the photoelectric detection device comprises a substrate, a driving layer and a photosensitive device layer, wherein the driving layer is arranged on one side of the substrate, the photosensitive device layer is arranged on one side of the driving layer away from the substrate, the photoelectric detection device further comprises a shading pattern, the photosensitive device layer comprises a first photosensitive unit and a second photosensitive unit, and the shading pattern is arranged on one side of the second photosensitive unit away from the driving layer. According to the photoelectric detection device, the shading pattern is arranged on one side, away from the driving layer, of the second photosensitive unit, the second photosensitive unit does not sense light, but senses temperature, temperature information sensed by the second photosensitive unit can determine temperature influence of the first photosensitive unit, the first photosensitive unit is correspondingly compensated, and inaccuracy of detection results caused by temperature influence of the photoelectric detector can be avoided.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
The above describes in detail a photoelectric detection device and a display device provided in the embodiments of the present application, and specific examples are applied to illustrate the principles and embodiments of the present application, where the above description of the embodiments is only for helping to understand the technical solution and core ideas of the present application; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims (5)
1. A photodetection device, characterized by comprising:
a substrate;
the driving layer is arranged on one side of the substrate;
the photosensitive device layer is arranged on one side of the driving layer away from the substrate;
the photoelectric detection device further comprises a shading pattern, the photosensitive device layer comprises a first photosensitive unit and a second photosensitive unit, and the shading pattern is arranged on one side, far away from the driving layer, of the second photosensitive unit; the first photosensitive unit at least comprises a first red photosensitive unit, a first green photosensitive unit and a first blue photosensitive unit, and the second photosensitive unit is different from any one of the first photosensitive units in photosensitive color.
2. The photodetection device according to claim 1, wherein the photosensitive device layer comprises:
the first electrode layer is arranged on one side of the driving layer away from the substrate;
the photosensitive layer comprises an active layer, and the photosensitive layer is arranged on one side of the first electrode layer far away from the driving layer;
the second electrode layer is arranged on one side of the photosensitive layer, which is far away from the first electrode layer;
the photoelectric detection device further comprises an encapsulation layer, wherein the encapsulation layer is arranged on one side, far away from the photosensitive layer, of the second electrode layer, and the shading pattern is arranged on one side, far away from the second electrode layer, of the encapsulation layer; or the shading pattern is arranged between the packaging layer and the second electrode layer.
3. The photodetection device according to claim 2, wherein the active layer comprises a first active portion corresponding to the first photosensitive unit and a second active portion corresponding to the second photosensitive unit, the first active portion being of a different material than the second active portion.
4. The photodetection device according to claim 2, further comprising a filter layer disposed on a side of the encapsulation layer away from the second electrode layer, the filter layer comprising a color blocking layer and a black matrix layer, the color blocking layer being disposed corresponding to the first photosensitive unit, the black matrix layer comprising a light shielding pattern.
5. A display device comprising a display panel and a photodetection device according to any one of claims 1 to 4.
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| CN109638177B (en) * | 2019-01-18 | 2022-01-11 | 京东方科技集团股份有限公司 | Display substrate, preparation method thereof and display panel |
| CN111370525B (en) * | 2020-03-13 | 2022-06-03 | 京东方科技集团股份有限公司 | Photoelectric detector, preparation method thereof and photoelectric detection device |
| CN112542089A (en) * | 2020-12-02 | 2021-03-23 | 合肥维信诺科技有限公司 | Display panel and display device |
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