OLED panel and bracelet

Abstract

The present invention provides an OLED panel and a wristband. The OLED panel includes a substrate; a plurality of OLED elements disposed above the substrate; and at least one organic photoelectric conversion device disposed above the substrate; at least one electrode of the organic photoelectric conversion device and an electrode of the OLED element are located on the same film layer; the organic photoelectric conversion device can receive light reflected from the OLED element and irradiated onto it by the object to be tested, and convert the light into an electrical signal for output. The OLED panel has a low manufacturing process cost and a simpler overall structural setting; and the OLED panel can integrate multiple information (such as biological information and touch information, etc.) detection and recognition functions, thereby making the information detection function of the OLED panel more novel and expanding its detection application field.

Description

Technical Field

[0001] The present invention belongs to the field of display technology, and particularly relates to an OLED panel and a wristband. Background Art

[0002] Integrating photoelectric sensors into OLED (Organic Light-Emitting Diode, also known as organic laser, organic light-emitting semiconductor) display panels to enable OLED display panels to detect and identify biometric information such as fingerprints has become a popular technological trend.

[0003] How to make the structure of OLED display panels integrated with photoelectric sensors simpler, the process cost lower, and the bioinformation detection and recognition functions more novel has become a technical problem that needs to be solved urgently. Summary of the Invention

[0004] To address the above-mentioned issues, the present invention provides an OLED panel and a wristband. The OLED panel boasts a low-cost manufacturing process and a simpler overall structure. Furthermore, the OLED panel can integrate multiple information detection and recognition functions (such as biometric information and touch information), making the OLED panel's information detection capabilities more novel and expanding its detection application areas.

[0005] The present invention provides an OLED panel, comprising a substrate;

[0006] A plurality of OLED elements are disposed above the substrate;

[0007] Also included is at least one organic photoelectric conversion device, disposed above the substrate;

[0008] At least one electrode of the organic photoelectric conversion device and one electrode of the OLED element are located on the same film layer;

[0009] The organic photoelectric conversion device can receive the light reflected by the object to be tested and irradiated thereon by the OLED element, and convert the light into an electrical signal for output.

[0010] Optionally, it further comprises a planar layer and a pixel defining layer, wherein the planar layer and the pixel defining layer are sequentially stacked on the substrate;

[0011] The organic photoelectric conversion device is adjacent to the OLED element and both are located on the planar layer;

[0012] The pixel defining layer is provided with a plurality of openings; the organic photoelectric conversion device and the OLED element are respectively located in different openings.

[0013] Optionally, it further comprises a planar layer and a pixel defining layer, wherein the planar layer and the pixel defining layer are sequentially stacked on the substrate;

[0014] The organic photoelectric conversion device is adjacent to the OLED element;

[0015] At least one first opening is formed in the planar layer; and a plurality of second openings are formed in the pixel defining layer.

[0016] The organic photoelectric conversion device is located on the substrate, and at least a portion of the organic photoelectric conversion device is located in the first opening;

[0017] The OLED element is located on the planar layer, and the plurality of OLED elements are respectively located in different second openings.

[0018] Optionally, the organic photoelectric conversion device includes a first electrode, a first hole transport layer, an organic photoelectric conversion layer, a first electron transport layer and a second electrode;

[0019] The first electrode, the first hole transport layer, the organic photoelectric conversion layer, the first electron transport layer and the second electrode are sequentially stacked on the planar layer;

[0020] The OLED element includes a third electrode, a second hole transport layer, a light emitting layer, a second electron transport layer and a fourth electrode;

[0021] The third electrode, the second hole transport layer, the light emitting layer, the second electron transport layer and the fourth electrode are sequentially stacked on the flat layer;

[0022] The first hole transport layer and the second hole transport layer are located on the same layer, and the first hole transport layer extends to connect with the second hole transport layer;

[0023] The first electron transport layer and the second electron transport layer are located on the same layer, and the first electron transport layer extends to connect with the second electron transport layer;

[0024] The second electrode and the fourth electrode are located on the same layer, and the second electrode extends to connect with the fourth electrode.

[0025] Optionally, the organic photoelectric conversion device includes a first electrode, a first hole transport layer, an organic photoelectric conversion layer, a first electron transport layer and a second electrode;

[0026] The first electrode, the first hole transport layer, the organic photoelectric conversion layer, the first electron transport layer and the second electrode are stacked in sequence on the substrate;

[0027] The OLED element includes a third electrode, a second hole transport layer, a light emitting layer, a second electron transport layer and a fourth electrode;

[0028] The third electrode, the second hole transport layer, the light emitting layer, the second electron transport layer and the fourth electrode are sequentially stacked on the flat layer;

[0029] The second electrode and the third electrode are located on the planar layer.

[0030] Optionally, the organic photoelectric conversion device includes at least one first conversion device;

[0031] The first electrode of the first conversion device is made of a light-transmitting material;

[0032] The third electrode of the OLED element is made of partially light-transmitting material;

[0033] The second electrode of the first conversion device is made of opaque material;

[0034] The fourth electrode of the OLED element is made of light-transmitting material.

[0035] Optionally, the organic photoelectric conversion device further includes at least one second conversion device;

[0036] The first electrode of the second conversion device is made of opaque material;

[0037] The second electrode of the second conversion device is made of a light-transmitting material.

[0038] Optionally, it further includes a first light shielding layer, which is provided in the substrate and located on a side of the first electrode close to the substrate;

[0039] The orthographic projection of the first light-shielding layer on the substrate surrounds at least the orthographic projection of the first electrode of the first conversion device on the substrate and the orthographic projection of the third electrode of the OLED element on the substrate.

[0040] Optionally, it further comprises a second light shielding layer, which is arranged on a side of the OLED element away from the substrate;

[0041] The orthographic projection of the second light-shielding layer on the substrate is at least arranged around the orthographic projection of the second electrode of the second conversion device on the substrate and around the orthographic projection of the fourth electrode of the OLED element on the substrate.

[0042] Optionally, the substrate includes a base and a transistor disposed on the base;

[0043] The transistor includes a gate, a gate insulating layer, an active layer, an intermediate dielectric layer, a source electrode, and a drain electrode; the source electrode and the drain electrode are located on the same layer; the gate electrode, the gate insulating layer, the active layer, the intermediate dielectric layer, the source electrode, and the drain electrode are sequentially arranged on the substrate; the source electrode and the drain electrode are respectively located at opposite ends of the active layer and are connected to the active layer through via holes provided in the intermediate dielectric layer;

[0044] The first light shielding layer is made of the same material as the source electrode and the drain electrode and is located on the intermediate dielectric layer;

[0045] Alternatively, the first light shielding layer and the gate are made of the same material and are located on the substrate.

[0046] Optionally, it further includes an encapsulation layer, which is arranged on a side of the OLED element away from the substrate and located on a side of the second light-shielding layer close to the substrate;

[0047] The encapsulation layer includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer; the first inorganic encapsulation layer, the organic encapsulation layer, and the second inorganic encapsulation layer are sequentially arranged away from the OLED element;

[0048] The organic encapsulation layer includes a first part and a second part, the first part and the second part are spliced ​​together; the first part is made of a light-transmitting material; the second part is made of an opaque material;

[0049] The orthographic projection of the first portion on the substrate covers the orthographic projections of the OLED element and the organic photoelectric conversion device on the substrate;

[0050] The orthographic projection of the second portion on the substrate is located at least in the spacing area between the adjacent organic photoelectric conversion device and the OLED element, and the orthographic projection of the second portion on the substrate does not overlap with the orthographic projections of the OLED element and the organic photoelectric conversion device on the substrate.

[0051] Optionally, an orthographic projection of the second portion on the substrate is arranged around the periphery of the organic photoelectric conversion device.

[0052] Optionally, the plurality of OLED elements are arranged in an array;

[0053] The organic photoelectric conversion device is located in a spacing area between adjacent OLED elements.

[0054] The present invention also provides a wristband comprising the above-mentioned OLED panel.

[0055] Optionally, the substrate in the OLED panel is located on the inner side of the wristband; and the OLED elements and organic photoelectric conversion devices in the OLED panel are located on the outer side of the wristband.

[0056] The beneficial effects of the present invention are as follows: the OLED panel provided by the present invention, the organic photoelectric conversion device and the film layer of the OLED element having the same or partially the same materials except the organic photoelectric conversion layer and the light-emitting layer can be prepared through fewer process steps, thereby saving the preparation process cost; at the same time, the overall structural setting of the OLED panel can be simplified; and the OLED panel can integrate multiple information (such as biological information and touch information, etc.) detection and recognition functions, thereby making the information detection function of the OLED panel more novel and expanding its detection application field.

[0057] The wristband provided by the present invention adopts the OLED panel in the above embodiment, so that the wristband can not only perform double-sided display, but also realize double-sided detection of at least two objects to be tested. The wristband has novel functions and a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 A schematic cross-sectional view of a local structure of an OLED panel provided by an embodiment of the present invention;

[0059] Figure 2 A schematic cross-sectional view of a partial structure of another OLED panel provided by an embodiment of the present invention;

[0060] Figure 3 A schematic cross-sectional view of a partial structure of another OLED panel provided by an embodiment of the present invention;

[0061] Figure 4 A schematic cross-sectional view of a partial structure of another OLED panel provided by an embodiment of the present invention;

[0062] Figure 5 A schematic cross-sectional view of a partial structure of another OLED panel provided by an embodiment of the present invention;

[0063] Figure 6 A schematic diagram of a curve showing the change over time of the current signal output by the first conversion device in the OLED panel provided by an embodiment of the present invention when detecting blood vessels;

[0064] Figure 7 A schematic diagram of a wristband worn on a wrist provided by an embodiment of the present invention.

[0065] The accompanying drawings are as follows:

[0066] 1. Substrate; 10. Base; 100. Transistor; 101. Gate; 102. Gate insulating layer; 103. Active layer; 104. Intermediate dielectric layer; 105. Source; 106. Drain; 2. OLED element; 21. Third electrode; 22. Second hole transport layer; 23. Light-emitting layer; 24. Second electron transport layer; 25. Fourth electrode; 3. Organic photoelectric conversion device; 301. First conversion device; 302. Second conversion device; 31. First electrode; 3 2. First hole transport layer; 33. Organic photoelectric conversion layer; 34. First electron transport layer; 35. Second electrode; 4. Blood vessel; 5. Finger; 6. Flat layer; 7. Pixel defining layer; 8. First light-shielding layer; 9. Second light-shielding layer; 11. Encapsulation layer; 111. First inorganic encapsulation layer; 110. Organic encapsulation layer; 1101. First part; 1102. Second part; 112. Second inorganic encapsulation layer; 12. Covering protection module; 13. Bracelet; 14. Wrist. DETAILED DESCRIPTION

[0067] In order to enable those skilled in the art to better understand the technical solution of the present invention, an OLED panel and a wristband of the present invention are further described in detail below with reference to the accompanying drawings and specific embodiments.

[0068] An embodiment of the present invention provides an OLED panel, such as Figure 1-Figure 5 As shown, it includes a substrate 1; multiple OLED elements 2, which are arranged above the substrate 1; and at least one organic photoelectric conversion device 3, which is arranged above the substrate 1; at least one electrode of the organic photoelectric conversion device 3 and one electrode of the OLED element 2 are located on the same film layer; the organic photoelectric conversion device 3 can receive light reflected by the OLED element 2 from the object to be tested and irradiate it, and convert the light into an electrical signal for output.

[0069] Among them, the OLED element 2 can be a white light OLED element, which can subsequently realize color display by setting a color film layer; the OLED element 2 can also be a combination of a red light OLED element, a green light OLED element and a blue light OLED element, which can realize color display. The objects to be tested are such as blood vessels 4, fingerprints of fingers 5, etc. The organic photoelectric conversion device 3 includes a first electrode 31, a first hole transport layer 32, an organic photoelectric conversion layer 33, a first electron transport layer 34 and a second electrode 35; the OLED element 2 includes a third electrode 21, a second hole transport layer 22, a light-emitting layer 23, a second electron transport layer 24 and a fourth electrode 25; the organic photoelectric conversion device 3 and the OLED element 2 have at least part of the same material as the first electrode 31 and the third electrode 21 except that the organic photoelectric conversion layer 33 and the light-emitting layer 23 are different; the first hole transport layer 32 and the second hole transport layer 22 are the same material; the first electron transport layer 34 and the second The electron transport layer 24 is made of the same material; the second electrode 35 and the fourth electrode 25 are made of at least part of the same material; therefore, the organic photoelectric conversion device 3 and the OLED element 2, except for the organic photoelectric conversion layer 33 and the light-emitting layer 23, have the same or partially identical film layers with other materials, and can be prepared through fewer process steps, thereby saving the preparation process cost; at the same time, it can also make the overall structural setting of the OLED panel simpler; and the OLED panel can integrate multiple information (such as biological information and touch information, etc.) detection and recognition functions, thereby making the information detection function of the OLED panel more novel and expanding its detection application field.

[0070] Optionally, in this embodiment, if Figure 1 and Figure 2 As shown, the OLED panel also includes a planar layer 6 and a pixel defining layer 7, which are stacked on the substrate 1 in sequence; the organic photoelectric conversion device 3 is adjacent to the OLED element 2 and both are located on the planar layer 6; a plurality of openings are opened in the pixel defining layer 7; the organic photoelectric conversion device 3 and the OLED element 2 are respectively located in different openings.

[0071] Optionally, the first electrode 31, the first hole transport layer 32, the organic photoelectric conversion layer 33, the first electron transport layer 34 and the second electrode 35 are stacked in sequence on the flat layer 6; the third electrode 21, the second hole transport layer 22, the light-emitting layer 23, the second electron transport layer 24 and the fourth electrode 25 are stacked in sequence on the flat layer 6; the first hole transport layer 32 and the second hole transport layer 22 are located on the same layer, and the first hole transport layer 32 extends to connect with the second hole transport layer 22; the first electron transport layer 34 and the second electron transport layer 24 are located on the same layer, and the first electron transport layer 34 extends to connect with the second electron transport layer 24; the second electrode 35 and the fourth electrode 25 are located on the same layer, and the second electrode 35 extends to connect with the fourth electrode 25.

[0072] Among them, the first hole transport layer 32 and the second hole transport layer 22 are located in the same layer and are made of the same material; therefore, the first hole transport layer 32 and the second hole transport layer 22 can be prepared by a single evaporation process; the first electron transport layer 34 and the second electron transport layer 24 are located in the same layer and are made of the same material; therefore, the first electron transport layer 34 and the second electron transport layer 24 can be prepared by a single evaporation process; thereby simplifying the preparation process steps of the OLED panel and saving the preparation cost of the OLED panel; at the same time, the OLED panel is also simpler in structure.

[0073] Optionally, in this embodiment, if Figure 1 As shown, the organic photoelectric conversion device 3 includes at least one first conversion device 301; the first electrode 31 of the first conversion device 301 is made of a light-transmitting material; the third electrode 21 of the OLED element 2 is made of a partially light-transmitting material; the second electrode 35 of the first conversion device 301 is made of a light-opaque material; and the fourth electrode 25 of the OLED element 2 is made of a light-transmitting material.

[0074] With this arrangement, the fourth electrode 25 of the OLED element 2 can transmit most of the light emitted by its light-emitting layer 23, and the third electrode 21 of the OLED element 2 can transmit a small portion of the light emitted by its light-emitting layer 23, thereby realizing the double-sided display function of the OLED element 2; if the object to be detected, such as a human blood vessel 4, is placed on the substrate 1 side of the OLED panel, the small portion of transmitted light is irradiated onto the blood vessel 4, the light reflected by the blood vessel 4 is incident on the first electrode 31 of the first conversion device 301, and the light transmitted through the first electrode 31 is incident on the organic photoelectric conversion layer 33 of the first conversion device 301. The organic photoelectric conversion layer 33 can convert this portion of light into a current signal, which is output by the first electrode 31 to the switching circuit (including the transistor 100) provided in the substrate 1, and is output to the identification module (not shown in the figure) through the switching circuit. The identification module identifies the corresponding biological information in the blood vessel 4 based on the current signal. For example, the principle of the first conversion device 301 identifying the biological information in the blood vessel 4 based on the light reflected by the blood vessel 4 is: utilizing the principle that the hemoglobin in the blood vessel 4 absorbs the near-infrared light in the incident light more strongly than other tissues, and through the processing of digital images, the subcutaneous blood vessels 4 are projected in situ on the skin surface, so that medical staff can clearly identify the patient's subcutaneous superficial veins and help identify the depth of the blood vessels, helping medical staff improve their work efficiency. Figure 6 , which is a schematic diagram of a curve showing the change of the current signal output by the first conversion device 301 over time when detecting the blood vessel 4 .

[0075] Optionally, in this embodiment, if Figure 2As shown, the organic photoelectric conversion device 3 further includes at least one second conversion device 302 ; the first electrode 31 of the second conversion device 302 is made of a light-impermeable material; and the second electrode 35 of the second conversion device 302 is made of a light-transmitting material.

[0076] With such a configuration, if the object to be tested, such as a human finger 5, is placed on the side of the OLED panel away from its substrate 1, the light emitted from the fourth electrode 25 of the OLED element 2 is irradiated on the finger 5, and the light reflected by the fingerprint of the finger 5 can be incident on the second electrode 35 of the second conversion device 302. After being transmitted through the second electrode 35, it is incident on the organic photoelectric conversion layer 33 of the second conversion device 302. The organic photoelectric conversion layer 33 can convert this part of the light into a current signal. The current signal is output by the first electrode 31 of the second conversion device 302 to the switching circuit (including the transistor 100) provided in the substrate 1, and is output to the identification module (not shown in the figure) through the switching circuit. The identification module identifies the touch position information of the finger 5 or the fingerprint information of the finger 5 based on the current signal, thereby realizing the finger 5 touch or fingerprint unlocking functions of the OLED panel.

[0077] In this embodiment, the first conversion device 301 can detect the object to be tested placed on the substrate 1 side of the OLED panel, and the second conversion device 302 can detect the object to be tested placed on the side of the OLED panel away from its substrate 1, thereby realizing double-sided detection and double-sided display of the OLED panel, thereby making the information detection function of the OLED panel more novel and expanding its detection application field.

[0078] In this embodiment, the third electrode 21 of the OLED element 2 utilizes a stacked structure of three conductive film layers: ITO / Ag / ITO. The Ag film layer of the third electrode 21 is appropriately thinned to achieve a small amount of light transmission and a large amount of light reflection. The first electrode 31 of the first conversion device 301 utilizes ITO material, enabling light transmission. The first electrode 31 of the second conversion device 301 utilizes a stacked structure of three conductive film layers: ITO / Ag / ITO. The Ag film layer of the first electrode 31 of the second conversion device 301 is thicker, achieving its light-proof performance. The third electrode 21 of the OLED element 2, the first electrode 31 of the first conversion device 301, and the first electrode 31 of the second conversion device 301 are all located on the planar layer 6. During fabrication, a first ITO film layer can be first deposited on the planar layer 6, and then the first ITO film layer can be etched to form the pattern of the first electrode 31 of the first conversion device 301. Then, an Ag film layer is deposited, and the Ag film layer in the third electrode 21 is thinned using a wet etching process. Finally, a second ITO film layer is deposited, and then the third electrode 21 and the first electrode 31 of the second conversion device 301 are simultaneously formed using a single wet etching process. The material selection and structural arrangement of the third electrode 21 of the OLED element 2, the first electrode 31 of the first conversion device 301, and the first electrode 31 of the second conversion device 301 in this embodiment greatly simplify the fabrication process for these three electrodes compared to those made of different materials and disposed on different film layers, thereby significantly reducing fabrication costs.

[0079] In this embodiment, the fourth electrode 25 of the OLED element 2, the second electrode 35 of the first conversion device 301, and the second electrode 35 of the second conversion device 302 all utilize a Mg / Ag mixed material. When forming the second electrode 35 of the first conversion device 301, the Mg / Ag ratio in the mixed material is adjusted to render it opaque. When forming the fourth electrode 25 of the OLED element 2 and the second electrode 35 of the second conversion device 302, the Mg / Ag ratio in the mixed material is adjusted to render it light-transmissive. The fourth electrode 25 of the OLED element 2, the second electrode 35 of the first conversion device 301, and the second electrode 35 of the second conversion device 302 are located in the same layer and made of the same material. They can be fabricated using a single evaporation process, thereby simplifying the manufacturing process steps and reducing the manufacturing cost of the OLED panel. Furthermore, the OLED panel also exhibits a simpler structure.

[0080] It should be noted that the second electrode 35 of the first conversion device 301 can also be light-transmissive, and the side where the second electrode 35 of the first conversion device 301 is located is made light-proof by a light-shielding layer subsequently provided on the side of the second electrode 35 of the first conversion device 301 facing away from the substrate 1 .

[0081] In this embodiment, the light emitting layer 23 and the organic photoelectric conversion layer 33 are made of different materials, and both are prepared by a single evaporation process.

[0082] Optionally, in this embodiment, the OLED panel further includes a first light-shielding layer 8, which is arranged in the substrate 1 and is located on the side of the first electrode 31 close to the substrate 1; the orthographic projection of the first light-shielding layer 8 on the substrate 1 is at least arranged around the orthographic projection of the first electrode 31 of the first conversion device 301 on the substrate 1 and around the orthographic projection of the third electrode 21 of the OLED element 2 on the substrate 1.

[0083] The provision of the first light-shielding layer 8 forms a first light-collimating aperture on the side of the third electrode 21 of the OLED element 2 near the substrate 1, allowing light emitted from the third electrode 21 to pass through the first light-collimating aperture and illuminate the object under test. Simultaneously, a second light-collimating aperture is formed on the side of the first electrode 31 of the first conversion device 301 near the substrate 1, allowing light reflected from the object under test to pass through the second light-collimating aperture and illuminate the first electrode 31 of the first conversion device 301. The first light-collimating aperture blocks stray light other than the collimated light irradiated by the OLED element 2 onto the object under test, while the second light-collimating aperture blocks stray light other than the collimated light reflected from the object under test and incident on the first electrode 31 of the first conversion device 301, thereby improving the detection accuracy of the first conversion device 301 with respect to the object under test.

[0084] Optionally, in this embodiment, the OLED panel further includes a second light-shielding layer 9, which is arranged on the side of the OLED element 2 facing away from the substrate 1; the orthographic projection of the second light-shielding layer 9 on the substrate 1 is at least arranged around the orthographic projection of the second electrode 35 of the second conversion device 302 on the substrate 1 and around the orthographic projection of the fourth electrode 25 of the OLED element 2 on the substrate 1.

[0085] The second light-shielding layer 9 forms a third light-collimating aperture on the side of the fourth electrode 25 of the OLED element 2 facing away from the substrate 1, allowing light emitted from the fourth electrode 25 to pass through the third light-collimating aperture and illuminate the object under test. Simultaneously, a fourth light-collimating aperture is formed on the side of the second electrode 35 of the second conversion device 302 facing away from the substrate 1, allowing light reflected from the object under test to pass through the fourth light-collimating aperture and illuminate the second electrode 35 of the second conversion device 302. The third light-collimating aperture blocks stray light other than the collimated light irradiated by the OLED element 2 onto the object under test, while the fourth light-collimating aperture blocks stray light other than the collimated light reflected from the object under test and incident on the second electrode 35 of the second conversion device 302. This improves the detection accuracy of the second conversion device 302 with respect to the object under test.

[0086] In this embodiment, the orthographic projection of the second light shielding layer 9 on the substrate 1 covers all areas except the orthographic projection of the second electrode 35 of the second conversion device 302 and the orthographic projection of the fourth electrode 25 of the OLED element 2 on the substrate 1 .

[0087] In this embodiment, the second light shielding layer 9 is made of black resin material, such as a black matrix material.

[0088] Optionally, in this embodiment, if Figure 1 and Figure 2 As shown, the substrate 1 includes a base 10 and a transistor 100 arranged on the base 10; the transistor 100 includes a gate 101, a gate insulating layer 102, an active layer 103, an intermediate dielectric layer 104, a source 105 and a drain 106; the source 105 and the drain 106 are located on the same layer; the gate 101, the gate insulating layer 102, the active layer 103, the intermediate dielectric layer 104, the source 105 and the drain 106 are arranged in sequence on the base 10; the source 105 and the drain 106 are respectively located at opposite ends of the active layer 103, and are respectively connected to the active layer 103 through vias opened in the intermediate dielectric layer 104; the first light shielding layer 8 is made of the same material as the source 105 and the drain 106 and is located on the intermediate dielectric layer 104.

[0089] The substrate 1 includes a pixel driving circuit and a detection signal output circuit disposed on a base 10. The pixel driving circuit includes multiple transistors 100, one of which, as a driver transistor, has its drain 106 connected to the third electrode 21 of the OLED element 2. The pixel driving circuit is used to drive the OLED element 2 to emit light. The detection signal output circuit includes at least one transistor 100, one of which has its drain 106 connected to the first electrode 31 of the organic photoelectric conversion device 3. The detection signal output circuit is used to output the current signal converted by the organic photoelectric conversion device 3. The base 10 is a transparent glass substrate.

[0090] In this embodiment, the pixel driving circuit and the detection signal output circuit both adopt traditional circuits, which will not be described in detail here.

[0091] It should be noted that the first light-shielding layer can also be made of the same material as the gate electrode 101 and be located on the substrate 10; alternatively, the first light-shielding layer can also be made of the same material as the active layer 103 and be located on the gate insulating layer 102; both materials and the first light-shielding layer at the respective positions can form a first light collimating hole on the side of the third electrode 21 of the OLED element 2 close to the substrate 1, so that the light emitted from the third electrode 21 passes through the first light collimating hole and is irradiated onto the object to be measured; and at the same time, a second light collimating hole can be formed on the side of the first electrode 31 of the first conversion device 301 close to the substrate 1, so that the light reflected by the object to be measured passes through the second light collimating hole and is irradiated onto the first electrode 31 of the first conversion device 301.

[0092] In this embodiment, the transistor 100 is a bottom-gate transistor. The transistor may also be a top-gate transistor, that is, the gate is located on the gate insulating layer and the active layer is located on the substrate. The specific type of transistor is not limited here.

[0093] Optionally, in this embodiment, if Figure 1 and Figure 2 As shown, the OLED panel also includes an encapsulation layer 11, which is arranged on the side of the OLED element 2 away from the substrate 1 and is located on the side of the second light-shielding layer close to the substrate 1; the encapsulation layer 11 includes a first inorganic encapsulation layer 111, an organic encapsulation layer 110, and a second inorganic encapsulation layer 112; the first inorganic encapsulation layer 111, the organic encapsulation layer 110, and the second inorganic encapsulation layer 112 are arranged in sequence away from the OLED element 2; the organic encapsulation layer 110 includes a first part 1101 and a second part 1102, and the first part 1101 and the second part 1102 are spliced ​​together; the first part 1101 is made of a light-transmitting material; the second part 1102 is made of an opaque material; the orthographic projection of the first part 1101 on the substrate 1 covers the orthographic projections of the OLED element 2 and the organic photoelectric conversion device 3 on the substrate 1; the orthographic projection of the second part 1102 on the substrate 1 is at least located in the interval area between adjacent organic photoelectric conversion devices 3 and OLED element 2, and the orthographic projection of the second part 1102 on the substrate 1 does not overlap with the orthographic projections of the OLED element 2 and the organic photoelectric conversion device 3 on the substrate 1.

[0094] Among them, the materials of the first inorganic encapsulation layer 111 and the second inorganic encapsulation layer 112 in the encapsulation layer 11 may include inorganic materials such as silicon oxynitride, silicon oxide, and silicon nitride. The inorganic materials have high density and can prevent water and oxygen from invading the OLED element 2, thereby ensuring that the OLED element 2 will not be damaged by water and oxygen; the organic encapsulation layer 110 uses a polymer resin material, such as polyimide, polyester material, etc. On the one hand, the organic encapsulation layer 110 can relieve the stress generated during the deposition of the first inorganic encapsulation layer 111 and the second inorganic encapsulation layer 112. On the other hand, the thickness of the organic encapsulation layer 110 can be made thicker, thereby playing a flattening role.

[0095] In this embodiment, the first portion 1101 is made of acrylic resin material; the second portion 1102 is made of black resin material or a transparent optical adhesive material doped with opaque metal particles (such as OC adhesive). The provision of the opaque second portion 1102 in the organic encapsulation layer 110 can block stray light emitted by the OLED element 2 and directly irradiated onto the organic photoelectric conversion device 3 without being reflected by the object to be tested. These stray light rays are reflected by the second portion 1102 and irradiated onto the object to be tested. After being reflected by the object to be tested, they are irradiated onto the organic photoelectric conversion device 3 again, thereby increasing the amount of light reflected by the object to be tested on the organic photoelectric conversion device 3, thereby improving the detection accuracy and detection efficiency of the organic photoelectric conversion device 3 on the object to be tested.

[0096] Preferably, in this embodiment, the orthographic projection of the second portion 1102 on the substrate 1 surrounds the periphery of the organic photoelectric conversion device 3. The second portion 1102 forms a closed loop. This configuration of the second portion 1102 further blocks stray light emitted by the OLED element 2 that directly strikes the organic photoelectric conversion device 3 without being reflected by the object under test, thereby further increasing the amount of light reflected by the object under test incident on the organic photoelectric conversion device 3, thereby further improving the detection accuracy and efficiency of the organic photoelectric conversion device 3 for the object under test.

[0097] In this embodiment, the first inorganic encapsulation layer 111 and the second inorganic encapsulation layer 112 are each formed by chemical vapor deposition. The preparation of the organic encapsulation layer 110 includes: first, coating a film layer of material forming the second portion on the prepared first inorganic encapsulation layer 111, then forming a pattern of the second portion 1102 through an exposure and development process; then, coating a film layer of material forming the first portion, and forming a pattern of the first portion 1101 through an exposure and development process.

[0098] In this embodiment, the OLED panel further includes a covering protection module 12, which is disposed on the side of the second light shielding layer 9 facing away from the substrate 1 and is used to cover and protect the substrate 1 having the OLED element 2 and the organic photoelectric conversion device 3. The covering protection module 12 is made of a light-transmitting material.

[0099] The embodiment of the present invention further provides an OLED panel, which is different from the above embodiment in that, Figure 3-Figure 5 As shown, the organic photoelectric conversion device 3 is adjacent to the OLED element 2; at least one first opening is opened in the flat layer 6; a plurality of second openings are opened in the pixel defining layer 7; the organic photoelectric conversion device 3 is located on the substrate 1, and the organic photoelectric conversion device 3 is at least partially located in the first opening; the OLED element 2 is located on the flat layer 6, and the plurality of OLED elements 2 are respectively located in different second openings.

[0100] In this embodiment, the first electrode 31, the first hole transport layer 32, the organic photoelectric conversion layer 33, the first electron transport layer 34 and the second electrode 35 are stacked in sequence on the substrate 1; the third electrode 21, the second hole transport layer 22, the light-emitting layer 23, the second electron transport layer 24 and the fourth electrode 25 are stacked in sequence on the flat layer 6; the second electrode 35 and the third electrode 21 are located on the flat layer 6.

[0101] In this embodiment, the structural arrangement of the various film layers in the substrate 1 is the same as in the above-described embodiment. The first electrode 31 and the source 105 and drain 106 of the transistor 100 in the substrate 1 are all located on the intermediate dielectric layer 104. The organic photoelectric conversion device 3 in this embodiment has an inverted structure compared to the organic photoelectric conversion device 3 in the above-described embodiment. This inverted structure allows the organic photoelectric conversion device 3 to have a lower dark current, thereby improving the detection accuracy of the organic photoelectric conversion device 3 for the object to be detected.

[0102] In this embodiment, the first hole transport layer 32, the organic photoelectric conversion layer 33 and the first electron transport layer 34 can be prepared at one time by a solution method. The specific process includes: sequentially coating the solution materials for preparing the first hole transport layer 32, the organic photoelectric conversion layer 33 and the first electron transport layer 34; drying each solution material film layer; coating photoresist on the first electron transport layer 34, exposing and developing the photoresist; and then simultaneously forming the patterns of the first hole transport layer 32, the organic photoelectric conversion layer 33 and the first electron transport layer 34 by oxygen dry etching.

[0103] In this embodiment, the first light shielding layer 8 and the gate 101 are made of the same material and are located on the substrate 10 .

[0104] It should be noted that if Figure 5 As shown, the first light-shielding layer 8 can also be made of the same material as the active layer 103 and be located on the gate insulating layer 102. The first light-shielding layer 8 configured in this manner can also form a first light-collimating hole on the side of the third electrode 21 of the OLED element 2 that is close to the substrate 1, so that light emitted from the third electrode 21 passes through the first light-collimating hole and then illuminates the object under test. Simultaneously, a second light-collimating hole can be formed on the side of the first electrode 31 of the first conversion device 301 that is close to the substrate 1, so that light reflected from the object under test passes through the second light-collimating hole and then illuminates the first electrode 31 of the first conversion device 301.

[0105] The other film layer structure settings, material settings of each film layer, and preparation methods of each film layer of the OLED panel in this embodiment are the same as those in the above embodiment and will not be repeated here.

[0106] Optionally, in the OLED panel of any of the above-described embodiments provided by the present invention, the plurality of OLED elements 2 are arranged in an array; and the organic photoelectric conversion devices 3 are located in the spacing regions between adjacent OLED elements 2. This arrangement ensures that the organic photoelectric conversion devices 3 do not occupy the locations where the OLED elements 2 are located, thereby ensuring that the display resolution of the OLED panel is not reduced, thereby ensuring the display clarity and display quality of the OLED panel.

[0107] In the OLED panel provided by the embodiment of the present invention, the organic photoelectric conversion device and the film layer of the OLED element having the same or partially identical materials except the organic photoelectric conversion layer and the light-emitting layer can be prepared through fewer process steps, thereby saving the preparation process cost; at the same time, it can also make the overall structural setting of the OLED panel simpler; and the OLED panel can integrate multiple information (such as biological information and touch information, etc.) detection and recognition functions, thereby making the information detection function of the OLED panel more novel and expanding its detection application field.

[0108] An embodiment of the present invention further provides a wristband, comprising the OLED panel in the above embodiment.

[0109] Among them, Figure 7 As shown, the wristband 13 can be worn on a wrist 14. The substrate in the OLED panel is located on the inner side of the wristband 13, that is, facing the wrist 14; the OLED elements and organic photoelectric conversion devices in the OLED panel are located on the outer side of the wristband 13, that is, facing away from the wrist 14.

[0110] By adopting the OLED panel in the above embodiment, the wristband can perform double-sided display and realize double-sided detection of at least two objects to be tested. The wristband has novel functions and a wide range of applications.

[0111] It will be understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present invention, and the present invention is not limited thereto. Those skilled in the art will appreciate that various modifications and improvements can be made without departing from the spirit and substance of the present invention, and such modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. An OLED panel comprising a substrate; A plurality of OLED elements are disposed above the substrate; It is characterized in that Also included is at least one organic photoelectric conversion device, disposed above the substrate; At least one electrode of the organic photoelectric conversion device and one electrode of the OLED element are located on the same film layer; The organic photoelectric conversion device can receive the light reflected by the OLED element from the object to be tested and convert the light into an electrical signal for output; The organic photoelectric conversion device includes a first electrode, a first hole transport layer, an organic photoelectric conversion layer, a first electron transport layer, and a second electrode; The OLED element includes a third electrode, a second hole transport layer, a light emitting layer, a second electron transport layer and a fourth electrode; The OLED panel further includes a planar layer and a pixel defining layer, wherein the planar layer and the pixel defining layer are sequentially stacked on the substrate; The organic photoelectric conversion device is adjacent to the OLED element and both are located on the planar layer; a plurality of openings are opened in the pixel defining layer; the organic photoelectric conversion device and the OLED element are respectively located in different openings; The second electrode and the fourth electrode are located on the same layer, and the second electrode extends to connect with the fourth electrode; Alternatively, the organic photoelectric conversion device is adjacent to the OLED element; at least one first opening is formed in the planar layer; a plurality of second openings are formed in the pixel defining layer; the organic photoelectric conversion device is located on the substrate, and at least a portion of the organic photoelectric conversion device is located in the first opening; The OLED element is located on the planar layer, and the plurality of OLED elements are respectively located in different second openings; The second electrode and the third electrode are located on the planar layer.

2. The OLED panel according to claim 1, wherein: The first electrode, the first hole transport layer, the organic photoelectric conversion layer, the first electron transport layer and the second electrode are sequentially stacked on the planar layer; The third electrode, the second hole transport layer, the light emitting layer, the second electron transport layer and the fourth electrode are sequentially stacked on the flat layer; The first hole transport layer and the second hole transport layer are located on the same layer, and the first hole transport layer extends to connect with the second hole transport layer; The first electron transport layer and the second electron transport layer are located on the same layer, and the first electron transport layer extends to connect with the second electron transport layer.

3. The OLED panel according to claim 1, wherein: The first electrode, the first hole transport layer, the organic photoelectric conversion layer, the first electron transport layer and the second electrode are stacked in sequence on the substrate; The third electrode, the second hole transport layer, the light emitting layer, the second electron transport layer and the fourth electrode are sequentially stacked on the planar layer.

4. The OLED panel according to claim 2 or 3, wherein: The organic photoelectric conversion device includes at least one first conversion device; The first electrode of the first conversion device is made of a light-transmitting material; The third electrode of the OLED element is made of partially light-transmitting material; The second electrode of the first conversion device is made of opaque material; The fourth electrode of the OLED element is made of light-transmitting material.

5. The OLED panel according to claim 4, wherein: The organic photoelectric conversion device further includes at least one second conversion device; The first electrode of the second conversion device is made of opaque material; The second electrode of the second conversion device is made of a light-transmitting material.

6. The OLED panel according to claim 5, wherein: It also includes a first light shielding layer, which is disposed in the substrate and located on a side of the first electrode close to the substrate; The orthographic projection of the first light-shielding layer on the substrate surrounds at least the orthographic projection of the first electrode of the first conversion device on the substrate and the orthographic projection of the third electrode of the OLED element on the substrate.

7. The OLED panel according to claim 6, wherein: It also includes a second light shielding layer, which is disposed on a side of the OLED element away from the substrate; The orthographic projection of the second light-shielding layer on the substrate is at least arranged around the orthographic projection of the second electrode of the second conversion device on the substrate and around the orthographic projection of the fourth electrode of the OLED element on the substrate.

8. The OLED panel according to claim 7, wherein: The substrate includes a base and a transistor disposed on the base; The transistor includes a gate, a gate insulating layer, an active layer, an intermediate dielectric layer, a source electrode, and a drain electrode; the source electrode and the drain electrode are located on the same layer; the gate electrode, the gate insulating layer, the active layer, the intermediate dielectric layer, the source electrode, and the drain electrode are sequentially arranged on the substrate; The source electrode and the drain electrode are respectively located at two opposite ends of the active layer, and are connected to the active layer through via holes provided in the intermediate dielectric layer; The first light shielding layer is made of the same material as the source electrode and the drain electrode and is located on the intermediate dielectric layer; Alternatively, the first light shielding layer and the gate are made of the same material and are located on the substrate.

9. The OLED panel according to claim 8, wherein: It also includes an encapsulation layer, which is arranged on a side of the OLED element away from the substrate and located on a side of the second light-shielding layer close to the substrate; The encapsulation layer includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer; the first inorganic encapsulation layer, the organic encapsulation layer, and the second inorganic encapsulation layer are sequentially arranged away from the OLED element; The organic encapsulation layer includes a first part and a second part, the first part and the second part are spliced ​​together; the first part is made of light-transmitting material; The second part is made of opaque material; The orthographic projection of the first portion on the substrate covers the orthographic projections of the OLED element and the organic photoelectric conversion device on the substrate; The orthographic projection of the second portion on the substrate is located at least in the spacing area between the adjacent organic photoelectric conversion device and the OLED element, and the orthographic projection of the second portion on the substrate does not overlap with the orthographic projections of the OLED element and the organic photoelectric conversion device on the substrate.

10. The OLED panel according to claim 9, wherein: The orthographic projection of the second portion on the substrate is arranged around the periphery of the organic photoelectric conversion device.

11. The OLED panel according to claim 1, wherein: The plurality of OLED elements are arranged in an array; The organic photoelectric conversion device is located in a spacing area between adjacent OLED elements.

12. A bracelet, characterized in that: The OLED panel comprises the OLED panel according to any one of claims 1 to 11.

13. The bracelet according to claim 12, characterized in that: The substrate in the OLED panel is located on the inner side of the wristband; the OLED elements and organic photoelectric conversion devices in the OLED panel are located on the outer side of the wristband.

Images