Display module and electronic equipment

Abstract

The invention discloses a display module and electronic equipment, and relates to the technical field of display devices.The display module comprises a display array arranged on the surface of an array substrate and provided with a plurality of light-emitting elements used for image display; a pixel gap is formed between the pixel openings of the adjacent light-emitting elements; the adjusting assembly is arranged on the light emitting side of the display array; the photosensitive element is located between the array substrate and the adjusting assembly; in the first direction, at least part of the photosensitive element is opposite to the pixel gap; the first direction is perpendicular to the plane where the array substrate is located; the adjusting assembly can be controlled to be in a light-transmitting state or a non-light-transmitting state. If in the light-transmitting state, the photosensitive element can detect external ambient light; if the display module is in the non-light-transmitting state, the photosensitive element can detect the light emitted by the light-emitting element and reflected by the internal structure of the display module. According to the technical scheme, the ambient light and the light emitted by the light-emitting element of the display module can be detected through the photosensitive element by controlling the light transmitting state of the adjusting assembly.

Description

Technical Field

[0001] The present application relates to the technical field of display devices, and in particular to a display module and an electronic device. Background Art

[0002] Currently, the display module of an electronic device can be integrated with an embedded photosensitive element to detect the brightness and color temperature of ambient light. However, the photosensitive element integrated in the display module of an electronic device can generally only detect ambient light, and cannot detect the light emitted by the light-emitting element in the display module itself. Summary of the invention

[0003] In view of the above problems, the present application provides a display module and an electronic device, so that the photosensitive element in the display module can not only detect the brightness and color temperature of the ambient light, but also detect the brightness and color temperature of the light emitted by the light-emitting element of the display module itself. The specific scheme is as follows:

[0004] In a first aspect, the present application provides a display module, comprising:

[0005] A display array disposed on the surface of an array substrate has a plurality of light emitting elements for image display; pixel openings of adjacent light emitting elements have a pixel gap between them;

[0006] An adjustment component disposed on the light-emitting side of the display array;

[0007] A photosensitive element is located between the array substrate and the adjustment component; in a first direction, at least a portion of the photosensitive element is arranged opposite to the pixel gap; the first direction is perpendicular to the plane where the array substrate is located;

[0008] Among them, the adjustment component can be controlled to be in a light-transmitting state or a non-light-transmitting state; if it is in the light-transmitting state, the photosensitive element can detect the external ambient light; if it is in the non-light-transmitting state, the photosensitive element can detect the light emitted by the light-emitting element reflected by the internal structure of the display module.

[0009] A second aspect of the present application provides an electronic device, comprising the above-mentioned display module.

[0010] By means of the above-mentioned technical scheme, in the display module and the electronic device provided by the present application, the adjustment component can be controlled to be in a light-transmitting state and a non-light-transmitting state. When in the light-transmitting state, the photosensitive element can detect the external ambient light. At this time, the brightness and color temperature and other information of the ambient light can be determined through the detection results of the photosensitive element. When in the non-light-transmitting state, the photosensitive element can detect the light emitted by the light-emitting element reflected by the internal structure of the display module. At this time, the brightness and color temperature of the light emitted by the light-emitting element of the display module itself can be determined through the detection results of the photosensitive element. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0012] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which this application can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by this application, should still fall within the scope of the technical contents disclosed in this application.

[0013] Figure 1 A schematic diagram of a photosensitive circuit of a photosensitive element in a display module;

[0014] Figure 2 is a schematic diagram of a pixel circuit in a display module;

[0015] Figure 3 A schematic diagram of the structure of a display module provided in an example of this application;

[0016] Figure 4 A schematic diagram of the structure of an adjustment component provided in this application example;

[0017] Figure 5 A schematic diagram of the structure of another display module provided in an embodiment of the present application;

[0018] Figure 6 A schematic diagram of the structure of another display module provided in an embodiment of the present application;

[0019] Figure 7 A schematic diagram of the structure of another display module provided in an embodiment of the present application;

[0020] Figure 8 A schematic diagram of the structure of another display module provided in an embodiment of the present application;

[0021] Fig. 9 A schematic diagram of the structure of another display module provided in an embodiment of the present application;

[0022] Fig.10 A schematic diagram of the structure of another display module provided in an embodiment of the present application;

[0023] Fig.11 A schematic diagram of the structure of another display module provided in an embodiment of the present application;

[0024] Fig.12 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0025] Reference numerals:

[0026] 10-array substrate; 11-substrate; 12-display array; 121-pixel definition layer; 13-light-emitting element; 131-anode; 132-organic light-emitting layer; 133-common cathode; 14-pixel opening; 15-pixel gap; 16-adjustment component; 161-first control electrode; 162-functional layer; 163-second control electrode; 17-photosensitive element; 18-circuit layer; 181-pixel circuit; 182-photosensitive circuit; 19-photosensitive opening; 20-touch component; 21-color film component; 22-black matrix layer; 221-first opening; 222-second opening; 231-color resistance unit; 232-filter unit; 24-transparent medium layer; 25-reflection structure; 26-display module; Us-control voltage; Y-first direction; PD- Photodiode; RST-first control signal; READ-second control signal; VDD-high level; GND-ground; M1-reset transistor; M2-control transistor; M3-readout transistor; D-light-emitting element; N1-first node; N2-second node; N3-third node; T1-first light-emitting control transistor; T2-data writing transistor; T3-driving transistor; T4-threshold compensation transistor; T5-first reset transistor; T6-second light-emitting control transistor; T7-second reset transistor; C-storage capacitor; PVDD-first power supply signal; PVEE-second power supply signal; S1-first scan signal; S2-second scan signal; Vref-reset voltage; Vdata-data signal; Emit-light-emitting control signal. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the embodiments of the present application. It is known to those skilled in the art that with the development of technology and the emergence of new scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0028] Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application. The terms used in the embodiments of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application.

[0029] refer to Figure 1 and Figure 2 , Figure 1The schematic diagram of the photosensitive circuit of the photosensitive element in the display module is shown in FIG. Figure 2 A schematic diagram of a pixel circuit in a display module.

[0030] like Figure 1 As shown, a photosensitive element is integrated in the display module, and the photosensitive element can be a photodiode PD. The photosensitive circuit connected to the photosensitive element includes: a reset transistor M1, a control transistor M2 and a readout transistor M3. The first electrode of the reset transistor M1 is connected to the high level VDD, the second electrode of the reset transistor M1 is connected to the positive electrode of the photodiode PD, and the gate of the reset transistor M1 is connected to the first control signal RST. The first electrode of the control transistor M2 is connected to the high level VDD, the gate of the control transistor M2 is connected to the positive electrode of the photodiode PD, and the second electrode of the control transistor M2 is connected to the first electrode of the readout transistor M3. The gate of the readout transistor M3 is connected to the second control signal READ, and the second electrode serves as the output end of the photosensitive circuit. The negative electrode of the photodiode PD is grounded GND.

[0031] like Figure 2 As shown, the pixel circuit is a 7T1C structure, having seven transistors and one capacitor. Specifically, the pixel circuit includes:

[0032] A driving transistor T3, wherein a gate of the driving transistor T3 is connected to the first node N1, a first electrode is connected to the second node N2, and a second electrode is connected to the third node N3;

[0033] a first light-emitting control transistor T1 and a second light-emitting control transistor T6, wherein the gates of the two light-emitting control transistors are both connected to the light-emitting control signal Emit, the first electrode of the first light-emitting control transistor T1 is connected to the first power supply signal PVDD, the second electrode of the first light-emitting control transistor T1 is connected to the second node, the first electrode of the second light-emitting control transistor T6 is connected to the third node, and the second electrode of the second light-emitting control transistor T6 is connected to the positive electrode of the light-emitting element D;

[0034] A first reset transistor T5, which may be a dual-gate transistor, wherein a first electrode of the first reset transistor T5 is connected to a reset voltage Vref, a second electrode of the first reset transistor T5 is connected to a first node N1, and a gate of the first reset transistor T5 is connected to a first scanning signal S1;

[0035] A threshold compensation transistor T4, which may be a dual-gate transistor, wherein a first electrode of the threshold compensation transistor T4 is connected to the first node N1, a second electrode of the threshold compensation transistor T4 is connected to the third node N3, and a gate of the threshold compensation transistor T4 is connected to the second scanning signal;

[0036] A data writing transistor T2, wherein a first electrode of the data writing transistor T2 is connected to a data signal Vdata, a second electrode of the data writing transistor T2 is connected to a second node N2, and a gate of the data writing transistor T2 is connected to a second scanning signal S2;

[0037] A second reset transistor T7, wherein a first electrode of the second reset transistor T7 is connected to a reset voltage Vref, a second electrode is connected to the positive electrode of the light emitting element D, and a gate of the second reset transistor T7 is connected to a second scanning signal S2;

[0038] In the pixel circuit, a storage capacitor C is connected between the first node N1 and the input terminal of the first power signal PVDD. The cathode of the light emitting element D is connected to the second power signal PVEE.

[0039] Optionally, the transistors in the photosensitive circuit diagram of the photosensitive element can be manufactured using the same process as the transistors in the pixel circuit to simplify the manufacturing process of the display module and reduce the manufacturing cost.

[0040] It should be noted that the photosensitive circuit of the photosensitive element in the display module is not limited to Figure 1 The structure shown in the figure can select the way in which the photosensitive element is connected to the photosensitive circuit according to the needs, and is not limited to Figure 1 The pixel circuit connected to the light-emitting element in the display module is not limited to Figure 7 The T1C structure may also be other pixel circuit structures. The embodiment of the present application does not limit the pixel circuit and the way in which the photosensitive element is connected to the photosensitive circuit.

[0041] In conventional display modules, photosensitive elements can only detect ambient light, but cannot detect the light emitted by their own light-emitting elements. In display modules, the light-emitting materials of the light-emitting elements will decay in life after being lit for a long time. Taking OLED panels as an example, the light-emitting elements are OLEDs, and the light-emitting materials of OLEDs will decay in life after being lit for a long time. This is reflected in the optical visual effect of the display module, which is the shift in the color temperature / color trajectory of the display module, resulting in color deviation in the display module. Since the photosensitive elements in the display module cannot detect the light emitted by its own light-emitting elements, the display module cannot monitor the shift in the color temperature / color trajectory of the display module in real time.

[0042] It should be noted that in the embodiment of the present application, the display module is not limited to an OLED panel, but may also be an LED panel or a micro LED panel. Among them, the light-emitting element in the micro LED is a micro LED, and the micro LED may be a MINI LED or a Micro LED.

[0043] In view of this, an embodiment of the present application provides a display module, including:

[0044] A display array disposed on the surface of an array substrate has a plurality of light emitting elements for image display; pixel openings of adjacent light emitting elements have a pixel gap between them;

[0045] An adjustment component disposed on the light-emitting side of the display array;

[0046] A photosensitive element is located between the array substrate and the adjustment component; in a first direction, at least a portion of the photosensitive element is arranged opposite to the pixel gap; the first direction is perpendicular to the plane where the array substrate is located;

[0047] Among them, the adjustment component can be controlled to be in a light-transmitting state or a non-light-transmitting state; if it is in the light-transmitting state, the photosensitive element can detect the external ambient light; if it is in the non-light-transmitting state, the photosensitive element can detect the light emitted by the light-emitting element reflected by the internal structure of the display module.

[0048] In the display module provided in the embodiment of the present application, the adjustment component can be controlled to be in a light-transmitting state and a non-light-transmitting state. When in the light-transmitting state, the photosensitive element can detect the external ambient light. At this time, the brightness and color temperature of the ambient light and other information can be determined through the detection results of the photosensitive element. When in the non-light-transmitting state, the photosensitive element can detect the light emitted by the light-emitting element reflected by the internal structure of the display module. At this time, the brightness and color temperature of the light emitted by the light-emitting element of the display module itself can be determined through the detection results of the photosensitive element.

[0049] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0050] refer to Figure 3 , Figure 3 A schematic diagram of a display module provided in an example of the present application, wherein the display module includes:

[0051] An array substrate 10;

[0052] A display array 12 is disposed on the surface of the array substrate 10, and the display array 12 has a plurality of light emitting elements 13 for image display; pixel gaps 15 are provided between pixel openings 14 of adjacent light emitting elements 13;

[0053] An adjustment component 16 disposed on the light-emitting side of the display array 12;

[0054] A photosensitive element 17 is located between the array substrate 10 and the adjustment component 16; in the first direction, at least a portion of the photosensitive element 17 is arranged opposite to the pixel gap 15; the first direction Y is perpendicular to the plane where the array substrate 10 is located;

[0055] Among them, the adjustment component can be controlled to be in a light-transmitting state or a non-light-transmitting state; if it is in the light-transmitting state, the photosensitive element can detect the external ambient light; if it is in the non-light-transmitting state, the photosensitive element can detect the light emitted by the light-emitting element reflected by the internal structure of the display module.

[0056] In the display module provided in the embodiment of the present application, the adjustment component 16 can be controlled to be in a light-transmitting state and a non-light-transmitting state. When in the light-transmitting state, the photosensitive element 17 can detect the external ambient light. At this time, the brightness and color temperature of the ambient light and other information can be determined through the detection result of the photosensitive element 17. When in the non-light-transmitting state, the photosensitive element 17 can detect the light emitted by the light-emitting element 13 reflected by the internal structure of the display module. At this time, the brightness and color temperature of the light emitted by the light-emitting element 13 of the display module itself can be determined through the detection result of the photosensitive element 17.

[0057] The display array 12 at least includes a first light emitting element for emitting red light R, a second light emitting element for emitting blue light B, and a third light emitting element for emitting green light G, so as to realize color image display.

[0058] Optionally, the array substrate 10 includes a substrate 11 and a circuit layer 18 located on a surface of the substrate 11 , and the display array 12 and the photosensitive element 17 are both located on a surface of the circuit layer 18 facing away from the substrate 11 .

[0059] In one implementation of the embodiment of the present application, along the first direction Y, the photosensitive element 17 can be located between the array substrate 10 and the display array 12. If the photosensitive element 17 and the light-emitting element 13 are located in different layers, the photosensitive element 17 and the light-emitting element 13 have sufficient layout space, which facilitates the preparation of the photosensitive element 17 and the light-emitting element 13 on the array substrate 10.

[0060] In other embodiments, the photosensitive element 17 and the light emitting element 13 may be arranged in the same layer along the first direction Y, and the photosensitive element 17 is closer to the light emitting surface of the light emitting element 13 and the light emitting side of the display module. In this way, when the adjustment component 16 is in the light-transmitting state, the ambient light can be better detected, and when the adjustment component 16 is in the non-light-transmitting state, the light emitted by the light emitting element 13 can be better detected, and the detection sensitivity of the photosensitive element 17 to the external ambient light and the light emitted by the light emitting element 13 of the display module itself can be improved.

[0061] refer to Figure 4 , Figure 4 A schematic diagram of the structure of an adjustment component provided in the present application example, based on any of the above embodiments, the adjustment component 16 of the display module includes: Figure 3 and Figure 4As shown, the adjustment component 16 includes: a first control electrode 161, a functional layer 162 and a second control electrode 163 stacked in sequence on the light-emitting side of the display array 12 along the first direction Y; the adjustment component 16 can adjust the state of the functional layer 162 through the control electrode to be in a light-transmitting state or a non-light-transmitting state.

[0062] The first control electrode 161 and the second control electrode 163 in the adjustment component 16 are both light-transmitting electrodes, which can be transparent thin film electrodes, such as ITO electrodes, or light-transmitting metal mesh electrodes. The embodiment of the present application does not limit the implementation of the first control electrode 161 and the second control electrode 163.

[0063] In the adjustment component 16 , the light transmission state of the functional layer 162 can be controlled by the control voltage Us connected to the first control electrode 161 and the second control electrode 163 .

[0064] It can be set that when the control voltage Us is greater than 0, it is in a black opaque state, and when the control voltage Us is equal to 0, it is in a transparent translucent state.

[0065] refer to Figure 5 , Figure 5 This is a schematic diagram of the structure of another display module provided in an embodiment of the present application. Based on the above implementation, Figure 5 In the display module shown, each light emitting element 13 has a common cathode 133, and the common cathode 133 is reused as the first control electrode 161. This method can control the common cathode 133 of the light emitting element 13 to be reused as the first control electrode 161 of the adjustment component 16, so that the first control electrode 161 can be prepared without a separate conductive layer, which can improve the integration and reduce the thickness of the display module.

[0066] The display module may be an OLED display module, and the light emitting element 13 is an OLED. The light emitting element 13 includes an anode 131, an organic light emitting layer 132 and a common cathode 133 stacked in sequence. The common cathode 133 is a transparent surface electrode, and each light emitting element 13 uses the same common cathode.

[0067] The display array 12 includes a pixel definition layer 121 located on the array substrate 10. The pixel definition layer 121 has a plurality of pixel openings 14 corresponding to the light-emitting elements 13. The organic light-emitting layers 132 of the light-emitting elements 13 are located in the corresponding pixel openings 14. The pixel openings 14 expose the anodes 131 of the corresponding light-emitting elements 13. The organic light-emitting layers 132 of the light-emitting elements 13 are respectively arranged in the pixel openings 14, and the organic light-emitting layers 132 are in electrical contact with the anodes 131 at the bottom of the pixel openings 14. A common cathode 133 is covered on the surface of the pixel definition layer 121, and the common cathode 133 is in electrical contact with the organic light-emitting layers in the respective pixel openings 14.

[0068] exist Figure 5 In the illustrated method, the photosensitive element 17 is disposed between the pixel definition layer 121 and the array substrate 10, and the area of ​​the pixel definition layer 121 opposite to the photosensitive element 17 has a photosensitive opening 19. The photosensitive opening 19 can reduce the shielding of light by the pixel definition layer 121, and improve the photosensitivity efficiency of the photosensitive element 17. In other methods, the photosensitive element 17 can also be directly disposed in the pixel definition layer 121, and disposed in the same layer as the light emitting element 13.

[0069] refer to Figure 6 , Figure 6 This is a schematic diagram of the structure of another display module provided in an embodiment of the present application. Based on the above implementation, Figure 6 The display module shown includes a touch component 20, and the touch component 20 has a touch electrode ( Figure 6 The touch control electrode is not shown in the figure). The touch control component 20 may use a mutual capacitance touch control electrode or a self capacitance touch control electrode. The embodiment of the present application does not limit the implementation method of the touch control component 20.

[0070] exist Figure 6 In the illustrated embodiment, the touch control component 20 is located between the adjustment component 16 and the display array 12, and the touch control electrode is reused as the first control electrode 161. This embodiment reuses the touch control electrode as the first control electrode 161, so that the first control electrode 161 does not need to be prepared with a separate conductive layer, which can improve the integration and reduce the thickness of the display module.

[0071] refer to Figure 7 , Figure 7 This is a schematic diagram of the structure of another display module provided in an embodiment of the present application. Based on the above implementation, Figure 7 The display module shown includes a touch component 20, and the touch component 20 has a touch electrode ( Figure 7 The touch control electrode is not shown in the figure). The touch control component 20 may use a mutual capacitance touch control electrode or a self capacitance touch control electrode. The embodiment of the present application does not limit the implementation method of the touch control component 20.

[0072] exist Figure 7 In the illustrated embodiment, the adjustment component 16 is located between the touch component 20 and the display array 12, and the touch electrodes are reused as the second control electrodes 163. This embodiment reuses the touch electrodes as the second control electrodes 163, so that the second control electrodes 163 do not need to be prepared with a separate conductive layer, which can improve the integration and reduce the thickness of the display module.

[0073] In an embodiment of the present application, the existing electrodes in the display panel can be reused as a control electrode in the adjustment component 16, such as reusing the touch electrode or the common cathode 133 as a control electrode in the adjustment component 16, or the control electrodes of the adjustment component 16 can be prepared separately by two additional conductive layers.

[0074] refer to Figure 8 , Figure 8 This is a schematic diagram of the structure of another display module provided in an embodiment of the present application. Based on the above implementation, Figure 8 The display module shown has a color film assembly 21 located on the light-emitting side of the display array 12; the adjustment assembly 16 is located on the side of the color film assembly 21 away from the display array 12. The color film assembly 21 includes: a black matrix layer 22, the black matrix layer 22 has first openings 221 arranged one by one opposite to the light-emitting elements 13; and a color resistance unit 231 located in the first opening 221.

[0075] The display array 12 at least includes a red light emitting element 13 for emitting red light R, a green light emitting element 13 for emitting green light G, and a blue light emitting element 13 for emitting blue light B. The color of the color resist unit 231 is the same as the color of the light emitted by the light emitting element 13 opposite to the first direction Y. The red color resist unit 231 is disposed in the first opening 221 opposite to the red light emitting element 13, the green color resist unit 231 is disposed in the first opening 221 opposite to the green light emitting element 13, and the blue color resist unit 231 is disposed in the first opening 221 opposite to the blue light emitting element 13.

[0076] Figure 8 The dashed arrow in the middle is used to indicate the propagation path of the light emitted by the light emitting element 13 reflected by the adjustment component 16 to the photosensitive element 17 .

[0077] By arranging the color film assembly 21 on the light-emitting side of the display array 12, the color purity and contrast can be improved, and the ambient light can be absorbed and filtered out, and the reflection of the ambient light can be reduced, thereby improving the display quality.

[0078] If the light-emitting side of the display array 12 has a color film assembly 21, the photosensitive element 17 can be arranged in the same layer as the light-emitting element 13, or the photosensitive element 17 is arranged between the display array 12 and the array substrate 10. In this case, the photosensitive element 17 is located between the array substrate 10 and the black matrix layer 22, and the area of ​​the black matrix layer 22 facing the photosensitive element 17 has a second opening 222, so that the ambient light or the reflected light of the light emitted by the light-emitting element 13 can enter the photosensitive element 17 through the second opening 222.

[0079] If the photosensitive element 17 is located between the color filter assembly 21 and the array substrate 10 , a filter unit 232 may be disposed in the second opening 222 .

[0080] If the photosensitive element 17 is a fingerprint sensor, the filter unit 232 can be any one of a green color resist unit, a red color resist unit and a blue color resist unit. In this way, the filter unit 232 can be prepared using a color film layer for preparing the color resist unit. The photosensitive element 17 can detect fingerprint information based on a single color of reflected light reflected by the finger when the adjustment component 16 is in a light-transmitting state.

[0081] When the filter unit 232 is a color-resistance unit, it is preferred to set the filter unit 232 to be a green color-resistance unit. Since the green light emitting element 13 has the highest luminous efficiency and the best stability, using green light as a light source can more effectively illuminate the fingerprint area, thereby improving the accuracy and speed of fingerprint recognition. In addition, since the green light spectrum is in the middle of the visible light, compared with blue light and red light, it has less interference, which helps to improve the quality of the fingerprint image, so that the control chip can more accurately capture and analyze fingerprint information.

[0082] The filter unit 232 may also be an infrared filter material that can transmit white light, and can detect the brightness and color temperature of visible light in the ambient light.

[0083] refer to Fig. 9 , Fig. 9 This is a schematic diagram of the structure of another display module provided in an embodiment of the present application. Based on the above implementation, Fig. 9 In the illustrated embodiment, the photosensitive element 17 is disposed on the surface of the black matrix layer 22 between the first openings 221. The photosensitive element 17 can be placed closer to the light-emitting side, thereby improving the collection efficiency of ambient light.

[0084] As described above, the array substrate 10 includes a substrate 11 and a circuit layer 18 located on the surface of the substrate 11, and the display array 12 and the photosensitive element 17 are both located on the surface of the circuit layer 18; the circuit layer 18 includes: a pixel circuit 181 connected to the light-emitting element 13; a photosensitive circuit 182 connected to the photosensitive element 17, and at least one circuit structure of the pixel circuit 181 and the photosensitive circuit 182 is in the same layer. The circuit structure in the pixel circuit 181 can be reused to prepare the photosensitive circuit 182, which can improve the compatibility of the preparation process and will not increase the thickness of the display module.

[0085] The implementation of the pixel circuit 181 includes but is not limited to Figure 2 The 7T1C structure shown may also be an 8T1C or other structure pixel circuit. The embodiment of the present application does not limit the implementation of the pixel circuit 181. The implementation of the photosensitive circuit 182 includes but is not limited to Figure 1 The three-transistor structure shown may also be a structure with other numbers of transistors interconnected. The embodiment of the present application does not limit the implementation method of the photosensitive circuit 182.

[0086] The pixel circuit 181 and the photosensitive circuit 182 both have thin film transistors; wherein the thin film transistors in the photosensitive circuit 182 and the thin film transistors in the pixel circuit 181 can both be P-type thin film transistors.

[0087] The pixel circuit 181 may be a low temperature polycrystalline oxide (LTPO) pixel circuit, in which the active regions of some transistors in the pixel circuit are made of indium gallium zinc oxide (IGZO), and the active regions of other transistors are made of low temperature polycrystalline silicon (LTPS). For example, the active regions of the threshold compensation transistor T4 and the first reset transistor T5 are made of metal oxide. The IGZO transistor is a dual-gate structure, and the IGZO transistor has a lower leakage current, so the use of the IGZO transistor in the pixel circuit can improve the image display quality of the display panel.

[0088] In the LTPO pixel circuit, the LTPS transistor is PMOS, and the IGZO transistor is NMOS. Based on this, the pixel circuit 181 can be set to include a P-type transistor and an N-type transistor. For example, the threshold compensation transistor T4 and the first reset transistor T5 can be set to be NMOS including an IGZO active area, and the other transistors are PMPOS including an LTPS active area. The thin film transistor in the photosensitive circuit 182 is an N-type transistor, so that the IGZO active layer in the pixel circuit 181 can be reused to prepare the N-type transistor in the photosensitive circuit 182, and the thin film transistor in the photosensitive circuit 182 can be prepared while preparing the N-type transistor in the pixel circuit 181, without adding a separate film layer to prepare the thin film transistor in the photosensitive circuit 182. In addition, the thin film transistor in the prepared photosensitive circuit 182 is an IGZO transistor, which has lower leakage and power consumption, and can improve the detection accuracy and stability of the photosensitive element 17.

[0089] In the embodiment of the present application, the photosensitive element 17 can be integrated into the display module as required.

[0090] In one implementation, the photosensitive element 17 may be located in the display array 12 , in the same layer as the light emitting element 13 .

[0091] In one implementation, the photosensitive element 17 may also be disposed between the display array 12 and the array substrate 10 .

[0092] In one embodiment, the photosensitive element 17 may also be located between the display array 12 and the adjustment component 16. Fig. 9 As shown, it is arranged on the surface of the black matrix layer 22 , or between the color film assembly 21 and the display array 12 .

[0093] refer to Fig.10 , Fig.10This is a schematic diagram of the structure of another display module provided in an embodiment of the present application. Based on the above implementation, Fig.10 In the illustrated embodiment, the light-emitting side of the display array 12 has a light-transmitting medium layer 24 , and the adjustment component 16 is located on the surface of the light-transmitting medium layer 24 ; wherein the refractive index of the light-transmitting medium layer 24 is greater than the refractive index of the adjustment component 16 .

[0094] Optionally, the light-transmitting medium layer 24 may be a thin film encapsulation layer on the light-emitting side of the light-emitting element 13 .

[0095] exist Fig.10 In the illustrated embodiment, since the refractive index of the transparent medium layer 24 is greater than the refractive index of the adjustment component 16, the transparent medium layer 24 is an optically dense medium relative to the upper adjacent adjustment component 16, as shown in FIG. Fig.10 The dotted arrow in the middle shows the light propagation path. The light emitted by the light emitting element 13 that is incident at a large angle can be totally reflected, which can improve the detection accuracy of the light emitting element 17 on the light emitted by the light emitting element 13 of the display module itself.

[0096] In one way, you can Fig.10 As shown, the first control electrode 161, the functional layer 162 and the second control electrode 163 of the adjustment component 16 are sequentially stacked on the surface of the transparent medium layer 24. At this time, the refractive index of the transparent medium layer 24 is greater than the refractive index of the adjustment component 16, which at least includes that the refractive index of the transparent medium layer 24 is greater than the refractive index of the first control electrode 161.

[0097] If the common cathode 133 is reused as the first control electrode 161, at this time, the functional layer 162 and the second control electrode 163 of the adjustment component 16 are sequentially stacked on the surface of the light-transmitting medium layer 24. At this time, the refractive index of the light-transmitting medium layer 24 is greater than the refractive index of the adjustment component 16, which at least includes that the refractive index of the light-transmitting medium layer 24 is greater than the refractive index of the functional layer 162.

[0098] refer to Fig.11 , Fig.11 This is a schematic diagram of the structure of another display module provided in an embodiment of the present application. Based on the above implementation, Fig.11 In the shown embodiment, the area opposite to the adjustment component 16 and the photosensitive element 17 has a reflective structure 25. The reflective structure 25 is used to improve the reflectivity of the light emitted by the light-emitting element 13 when it is in a non-light-transmitting state, thereby improving the detection accuracy of the photosensitive element 17 on the light emitted by the light-emitting element 13 of the display module itself.

[0099] exist Fig.11In the illustrated embodiment, the reflective structure 25 includes a plurality of micro-protrusions located on the side of the adjustment component 16 facing the photosensitive element 17, and a Bragg reflection structure can be formed based on the plurality of micro-protrusions to improve the reflectivity of the light emitted by the light-emitting element 13. In other embodiments, the surface of the side of the adjustment component 16 opposite to the photosensitive element 17 can be a concave surface, and the focus of the concave surface can be located on the photosensitive element 17, so that the light reflected and converged by it converges on the photosensitive element 17, which can improve the detection accuracy of the light emitted by the light-emitting element 13 of the display module by the photosensitive element 17.

[0100] In any implementation of the embodiments of the present application, the adjustment component 16 can be an electrochromic component. In this case, the functional layer 162 is an electrochromic layer, and the color change of the electrochromic layer can be controlled by two control electrodes to achieve the switching of the adjustment component 16 between the light-transmitting state and the non-light-transmitting state.

[0101] In another embodiment, the adjustment component 16 may be a liquid crystal light valve, in which case the functional layer 162 is a liquid crystal layer, and the deflection angle of the liquid crystal molecules of the electrochromic layer may be controlled by two control electrodes to switch the adjustment component 16 between a light-transmitting state and a non-light-transmitting state.

[0102] The display module provided in the embodiment of the present application includes a display area and a binding area, wherein a control chip is provided in the binding area, and the control chip is connected to the pixel circuit 181, and can control the light emitting element 13 to display an image through the pixel circuit 181. The control chip is also connected to the photosensitive circuit 182, and can obtain the light information collected by the photosensitive element 17 through the photosensitive circuit 182.

[0103] Specifically, when the adjustment component 16 is in a light-transmitting state, the first light information can be obtained. When the adjustment component 16 is in a non-light-transmitting state, the second light information can be obtained. The control chip can control the adjustment component 16 to switch states to select the first light information and the second light information.

[0104] If the photosensitive element 17 is an ambient light sensor, the first light information can represent the brightness and chromaticity information of the current ambient light and the light emitted by the light emitting element 13 in the current display state. If the photosensitive element 17 is a fingerprint sensor, the first light information is the light emitted by the light emitting element 13 reflected by the finger when the finger is pressed on the display module, and the fingerprint image information can be determined based on the first light information.

[0105] Since the adjustment component 16 shields interference from external light in the non-light-transmitting state, the second light information can represent the brightness and chromaticity information of the light emitted by the light-emitting element 13 in the current display state.

[0106] Furthermore, if the photosensitive element 17 is a fingerprint sensor, the control chip is also used to determine the fingerprint information based on the first light information when the adjustment component 16 is in a light-transmitting state, so as to realize the fingerprint recognition function.

[0107] If the photosensitive element 17 is an ambient light sensor, the control chip is further used to determine the brightness and color temperature of the current ambient light based on the first light information and the second light information, respectively. The brightness and color temperature of the current ambient light can be determined based on the difference between the first light information and the second light information.

[0108] The control chip is also used to determine the current color temperature and current brightness of the light emitting element 13 based on the second light information. The control chip stores the calibrated brightness and calibrated color temperature of the light emitting element 13. The control chip can perform display compensation on the data signal to be displayed of the light emitting element 13 based on the difference between the current color temperature and the calibrated color temperature and the difference between the current brightness and the calibrated brightness, so as to solve the color deviation problem caused by the life attenuation of the light emitting element 13.

[0109] From the above description, it can be seen that the display module provided in the embodiment of the present application can detect the color temperature / brightness changes of the display module itself and the color temperature / brightness changes of the external ambient light in real time without changing its own resolution and luminous visual effect, that is, without affecting the display PPI and the width of the border area.

[0110] Based on the display module provided in the above embodiment, another embodiment of the present application further provides an electronic device, the structure of the electronic device can be as follows: Fig.12 shown.

[0111] refer to Fig.12 , Fig.12 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. The electronic device shown includes a display module 26. The display module 26 can be a display module provided in any implementation manner of the above embodiments.

[0112] The electronic device adopts the display module 26 provided in the above embodiment and can detect the ambient light and the light emitted by the light emitting element 13 by controlling the working state of the adjustment component 16 .

[0113] Optionally, the electronic device includes electronic products with display function such as mobile phones, tablet computers, laptop computers and wearable devices.

[0114] In the specification of this application, each embodiment is described in a progressive, parallel, or progressive and parallel manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. The embodiments provided in the embodiments of this application can be combined with each other if there is no contradiction.

[0115] It should be noted that in the description of the present application, it should be understood that the description of the drawings and embodiments is illustrative rather than restrictive. The same reference numerals throughout the embodiments of the specification identify the same structure. In addition, for the sake of understanding and ease of description, the drawings may exaggerate the thickness of some layers, films, panels, regions, etc. It is also understood that when an element such as a layer, film, region, or substrate is referred to as "on" another element, the element may be directly on the other element or there may be an intermediate element. In addition, "on" refers to positioning an element on or below another element, but does not essentially refer to positioning on the upper side of another element according to the direction of gravity.

[0116] The terms "upper", "lower", "top", "bottom", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time.

[0117] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that an article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or device. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the article or device including the above elements.

[0118] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display module, characterized in that: include: An array substrate; A display array disposed on the surface of the array substrate has a plurality of light emitting elements for image display; There is a pixel gap between the pixel openings of adjacent light-emitting elements; An adjustment component disposed on the light-emitting side of the display array; A photosensitive element located between the array substrate and the adjustment component; In a first direction, at least a portion of the photosensitive element is arranged opposite to the pixel gap; the first direction is perpendicular to the plane where the array substrate is located; Among them, the adjustment component can be controlled to be in a light-transmitting state or a non-light-transmitting state; if in the light-transmitting state, the photosensitive element can detect external ambient light; if in the non-light-transmitting state, the photosensitive element can detect the light emitted by the light-emitting element reflected by the internal structure of the display module.

2. The display module according to claim 1, characterized in that: The adjustment component includes: a first control electrode, a functional layer, and a second control electrode stacked in sequence on the light-emitting side of the display array along the first direction; the adjustment component can adjust the state of the functional layer through the control electrode to be in the light-transmitting state or the non-light-transmitting state.

3. The display module according to claim 2, characterized in that: Each of the light emitting elements has a common cathode, and the common cathode is reused as the first control electrode.

4. The display module according to claim 2, characterized in that: The display module includes a touch component, and the touch component has a touch electrode; Wherein, the touch control component is located between the adjustment component and the display array, and the touch control electrode is multiplexed as the first control electrode; Alternatively, the regulating component is located between the touch control component and the display array, and the touch control electrode is multiplexed as the second control electrode.

5. The display module according to claim 1, characterized in that: The array substrate comprises a base and a circuit layer located on the surface of the base, and the display array and the photosensitive element are both located on the surface of the circuit layer; The circuit layer includes: a pixel circuit connected to the light-emitting element; a photosensitive circuit connected to the photosensitive element, and the pixel circuit and at least one circuit structure of the photosensitive circuit are in the same layer.

6. The display module according to claim 5, characterized in that: The pixel circuit and the photosensitive circuit both have thin film transistors; Wherein, the thin film transistor in the photosensitive circuit and the thin film transistor in the pixel circuit are both P-type thin film transistors; Alternatively, the pixel circuit includes a P-type transistor and an N-type transistor; and the thin film transistor in the photosensitive circuit is an N-type transistor.

7. The display module according to claim 1, characterized in that: The display array comprises a pixel definition layer located on the array substrate, the pixel definition layer having a plurality of pixel openings corresponding to the light emitting elements one by one, and the organic light emitting layers of the light emitting elements are located in the corresponding pixel openings; The photosensitive element is located between the pixel definition layer and the array substrate, and a region of the pixel definition layer opposite to the photosensitive element has a photosensitive opening.

8. The display module according to claim 1, characterized in that: The photosensitive element is located between the display array and the adjustment component.

9. The display module according to claim 1, characterized in that: The display module has a color film component located on the light-emitting side of the display array; the adjustment component is located on the side of the color film component away from the display array; The color film assembly comprises: a black matrix layer, the black matrix layer having first openings arranged one by one opposite to the light emitting elements; a color resistance unit located in the first opening; Wherein, the photosensitive element is arranged on the surface of the black matrix layer between the first openings.

10. The display module according to claim 1, characterized in that: The display module has a color film component located on the light-emitting side of the display array; the adjustment component is located on the surface of the color film component; The color film assembly comprises: a black matrix layer, the black matrix layer having first openings arranged one by one opposite to the light emitting elements; a color resistance unit located in the first opening; The photosensitive element is located between the array substrate and the black matrix layer, and a second opening is provided in a region of the black matrix layer opposite to the photosensitive element.

11. The display module according to claim 1, characterized in that: The light-emitting side of the display array has a light-transmitting medium layer, and the adjustment component is located on the surface of the light-transmitting medium layer; Wherein, the refractive index of the light-transmitting medium layer is greater than the refractive index of the adjusting component.

12. The display module according to any one of claims 1 to 11, characterized in that: The area of ​​the adjustment component opposite to the photosensitive element has a reflective structure for improving the reflectivity of the light emitted by the light-emitting element when in the non-light-transmitting state.

13. The display module according to claim 12, characterized in that: The reflective structure includes a plurality of micro protrusions located on a side of the adjustment component facing the photosensitive element; Alternatively, a surface of the adjustment component opposite to the photosensitive element is a concave surface.

14. The display module according to any one of claims 1 to 13, characterized in that: The regulating component is an electrochromic component or a liquid crystal light valve.

15. An electronic device, characterized in that: Comprising a display module as described in any one of claims 1-14.

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