Display panel and manufacturing method thereof, ambient light intensity detection method and device

Abstract

A display panel and a manufacturing method thereof, and an ambient light intensity detection method and device. The display panel comprises an array substrate (10) and a functional device layer (20), wherein the functional device layer (20) is located on a bearing surface of the array substrate (10). The functional device layer (20) comprises a first photosensitive device (23), a second photosensitive device (24), and a plurality of light-emitting devices (22). The first photosensitive device (23) is used to detect light emitted by the light-emitting device (22) reflected by a finger, and comprises a first photosensitive layer (231), a first electrode (232), and a second electrode (233). The first electrode (232) and the second electrode (233) are located on opposite sides of the first photosensitive layer (231). The second photosensitive device (24) is used to detect the intensity of ambient light, and comprises a second photosensitive layer (241), a third electrode (242), and a fourth electrode (243). The second photosensitive layer (241) is in the same layer as the first photosensitive layer (231), the third electrode (242) is in the same layer as the first electrode (232), and the fourth electrode (243) is in the same layer as the second electrode (233). Compared with arranging an ambient light sensor below the display panel, the thickness of the entire display panel can be reduced.

Description

Technical Field

[0001] The present disclosure relates to the field of display panels, and in particular to a display panel and a manufacturing method thereof, and an ambient light intensity detection method and device. Background Art

[0002] With the development of technology, the functions of electronic devices such as mobile phones are becoming increasingly rich. For example, fingerprint unlocking technology has been developed to facilitate unlocking electronic devices. To improve display quality, electronic devices can adjust the image according to the ambient light.

[0003] In related technologies, fingerprint unlocking is achieved by installing a fingerprint sensor in the display panel. An ambient light sensor is installed below the display panel to detect ambient light, allowing the display panel to adjust the display effect according to the ambient light. However, electronic devices with this structure are relatively thick. Summary of the Invention

[0004] The present disclosure provides a display panel and a manufacturing method thereof, as well as an ambient light intensity detection method and device, which can reduce the thickness of the display panel. The technical solution is as follows:

[0005] In a first aspect, an embodiment of the present disclosure provides a display panel, comprising an array substrate and a functional device layer, wherein the functional device layer is located on a carrying surface of the array substrate;

[0006] The functional device layer includes a first photosensitive device, a second photosensitive device and a plurality of light-emitting devices;

[0007] The first photosensitive device is used to detect light emitted by the light-emitting device reflected by a finger, and includes a first photosensitive layer, a first electrode, and a second electrode, wherein the first electrode and the second electrode are located on opposite sides of the first photosensitive layer, and the first electrode is located on a side of the first photosensitive layer close to the array substrate;

[0008] The second photosensitive device is used to detect the intensity of ambient light, and includes a second photosensitive layer, a third electrode and a fourth electrode. The second photosensitive layer is in the same layer as the first photosensitive layer, the third electrode is in the same layer as the first electrode, and the fourth electrode is in the same layer as the second electrode.

[0009] Optionally, the light-emitting device includes an anode, a light-emitting layer and a cathode, the anode and the cathode are located on opposite sides of the light-emitting layer, and the anode is located on a side of the light-emitting layer close to the array substrate, and the anode is in the same layer as the second electrode.

[0010] Optionally, the display panel further includes a color filter layer, which is located on a side of the functional device layer away from the array substrate. The color filter layer includes a plurality of color blocks distributed in an array and a shading structure located between the plurality of color blocks. The light-emitting device is opposite to the color blocks. The shading structure has a fingerprint hole and an ambient light hole. The first photosensitive layer is opposite to the fingerprint hole, and the second photosensitive layer is opposite to the ambient light hole.

[0011] Optionally, the ratio of the width of the ambient light hole to the width of the second photosensitive layer is 0.5 to 1.5, the width direction of the ambient light hole and the width direction of the second photosensitive layer are both parallel to the supporting surface of the array substrate and are located in a reference plane, which is a plane perpendicular to the supporting surface of the array substrate and passing through the center of the ambient light hole.

[0012] Optionally, the center of the color block closest to the ambient light hole is located in the reference plane, and the ambient light hole and the color block closest to the ambient light hole satisfy the following relationship:

[0013] When the width of the ambient light hole is greater than the width of the second photosensitive layer, tanα=(Pd) / h, tanβ=(P+d) / h;

[0014] When the width of the ambient light hole is not greater than the width of the second photosensitive layer, tanα=(PD) / h, tanβ=(P+D) / h;

[0015] Wherein, P is the distance between the center of the ambient light hole and the center of the nearest color block in a direction parallel to the carrying surface of the array substrate, h is the distance between the color block and the second photosensitive layer in a direction perpendicular to the carrying surface of the array substrate, and 0<α<β≤42°.

[0016] Optionally, the functional device layer further includes a color temperature sensor, and the color temperature sensor includes a third photosensor, a fourth photosensor, and a fifth photosensor;

[0017] The third photosensor, the fourth photosensor, and the fifth photosensor are respectively opposite to color blocks of different colors.

[0018] Optionally, the third photosensitive device includes a third photosensitive layer, a fifth electrode and a sixth electrode;

[0019] The fourth photosensitive device includes a fourth photosensitive layer, a seventh electrode and an eighth electrode;

[0020] The fifth photosensitive device includes a fifth photosensitive layer, a ninth electrode and a tenth electrode;

[0021] The third photosensitive layer, the fourth photosensitive layer and the fifth photosensitive layer are all on the same layer as the first photosensitive layer;

[0022] The fifth electrode, the seventh electrode and the ninth electrode are all in the same layer as the first electrode;

[0023] The sixth electrode, the eighth electrode, and the tenth electrode are all in the same layer as the second electrode.

[0024] Optionally, the array substrate includes a display area and a peripheral area surrounding the display area, and the light-emitting device and the first photosensitive device are both located in the display area;

[0025] The second photosensor and the color temperature sensor are both located in the display area or the peripheral area.

[0026] Optionally, the functional device layer further includes a transparent protective layer, and the transparent protective layer is located on surfaces of the first photosensitive layer, the second photosensitive layer, the third photosensitive layer, the fourth photosensitive layer, and the fifth photosensitive layer away from the array substrate;

[0027] The transparent protective layer has multiple via holes, and the second electrode, the fourth electrode, the sixth electrode, the eighth electrode and the tenth electrode are respectively connected to the first photosensitive layer, the second photosensitive layer, the third photosensitive layer, the fourth photosensitive layer and the fifth photosensitive layer through the via holes.

[0028] In a second aspect, an embodiment of the present disclosure further provides a method for manufacturing a display panel, the method comprising:

[0029] providing an array substrate;

[0030] forming a first electrode layer on the carrying surface of the array substrate, wherein the first electrode layer includes a first electrode and a third electrode;

[0031] forming a photosensitive layer on the first electrode layer, wherein the photosensitive layer includes a first photosensitive layer located on the first electrode and a second photosensitive layer located on the third electrode;

[0032] forming a second electrode layer on the photosensitive layer, wherein the second electrode layer includes a second electrode located on the first photosensitive layer and a fourth electrode located on the second photosensitive layer, so as to form a first photosensitive device and a second photosensitive device on the supporting surface of the array substrate;

[0033] A plurality of light emitting devices are formed to form a functional device layer on the carrying surface of the array substrate.

[0034] In a third aspect, an embodiment of the present disclosure further provides a method for detecting ambient light intensity, which is used for the display panel described in the first aspect, and includes:

[0035] determining the first ambient light intensity based on a relationship between the signal amount of the electrical signal generated by the second photosensor during the first integration time and the ambient light intensity, and an actual signal amount of the electrical signal generated by the second photosensor during the first integration time;

[0036] determining a second integration time period according to the first ambient light intensity, wherein the second integration time period is greater than the first integration time period;

[0037] The second ambient light intensity is determined based on the relationship between the signal amount of the electrical signal generated by the second photosensor within the second integration time and the ambient light intensity, and the actual signal amount of the electrical signal generated by the second photosensor within the second integration time.

[0038] Optionally, determining the second integration time according to the first ambient light intensity includes:

[0039] According to the correspondence between the ambient light intensity intervals and the integration time periods, the integration time period corresponding to the interval containing the first ambient light intensity is determined as the second integration time period.

[0040] In a fourth aspect, an embodiment of the present disclosure further provides an ambient light intensity detection device, the device comprising:

[0041] a light intensity determination module, configured to determine the first ambient light intensity based on a relationship between a signal amount of the electrical signal generated by the second photosensor during the first integration period and the ambient light intensity, and an actual signal amount of the electrical signal generated by the second photosensor during the first integration period;

[0042] a duration determination module, configured to determine a second integration duration according to the first ambient light intensity, wherein the second integration duration is greater than the first integration duration;

[0043] The light intensity determination module is also used to determine the second ambient light intensity based on the relationship between the signal amount of the electrical signal generated by the second photosensor within the second integration time and the ambient light intensity, and the actual signal amount of the electrical signal generated by the second photosensor within the second integration time.

[0044] Optionally, the duration determination module is configured to determine the integration duration corresponding to the interval containing the first ambient light intensity as the second integration duration according to a correspondence between the ambient light intensity interval and the integration duration.

[0045] In a fifth aspect, an embodiment of the present disclosure further provides a display device, which includes the display panel described in the first aspect.

[0046] The beneficial effects of the technical solutions provided by the embodiments of the present disclosure include at least:

[0047] The first photosensor detects light emitted by the light-emitting device that is reflected by the finger for fingerprint recognition, while the second photosensor detects the intensity of ambient light. By arranging the first photosensitive layer, first electrode, and second electrode of the first photosensor and the second photosensitive layer, third electrode, and fourth electrode of the second photosensor on the same layer, the overall thickness of the display panel can be reduced compared to placing an ambient light sensor below the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0049] Figure 1 It is a schematic diagram of the local structure of a display panel;

[0050] Figure 2 is a top view of a display panel provided by an embodiment of the present disclosure;

[0051] Figure 3 yes Figure 2 Section Ⅰ-Ⅰ in the figure;

[0052] Figure 4 yes Figure 3 Schematic diagram of the local structure in;

[0053] Figure 5 This is a schematic diagram of the coordination between a second photosensitive layer and a color filter layer provided by an embodiment of the present disclosure;

[0054] Figure 6 is a schematic diagram of a partial structure of a display panel provided by an embodiment of the present disclosure;

[0055] Figure 7 is a schematic diagram of a partial structure of a display panel provided by an embodiment of the present disclosure;

[0056] Figure 8 is an enlarged schematic diagram of a first photosensitive device provided by an embodiment of the present disclosure;

[0057] Figure 9 is a schematic diagram of a circuit structure of a second photosensor and a color temperature sensor provided by an embodiment of the present disclosure;

[0058] Figure 10 is a flow chart of a method for manufacturing a display panel provided by an embodiment of the present disclosure;

[0059] Figure 11is a schematic diagram of a manufacturing process of a display panel provided by an embodiment of the present disclosure;

[0060] Figure 12 is a flow chart of a method for detecting ambient light intensity provided by an embodiment of the present disclosure;

[0061] Figure 13 is a flow chart of another ambient light intensity detection method provided by an embodiment of the present disclosure;

[0062] Figure 14 is a curve showing the relationship between the signal amount of the electrical signal generated by the second photosensor provided by the embodiment of the present disclosure and the ambient light intensity;

[0063] Figure 15 This is a structural block diagram of an ambient light intensity detection device provided by an embodiment of the present disclosure;

[0064] Figure 16 A structural block diagram of an ambient light intensity detection device provided by an exemplary embodiment of the present invention is shown. DETAILED DESCRIPTION

[0065] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0066] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by persons of ordinary skill in the field to which the present disclosure belongs. The words “first”, “second”, “third” and similar terms used in the patent application specification and claims of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as “a” or “an” do not indicate a quantity limitation, but rather indicate the presence of at least one. Words such as “include” or “comprise” mean that the elements or objects appearing before “include” or “comprises” include the elements or objects listed after “include” or “comprises” and their equivalents, and do not exclude other elements or objects. Words such as “connect” or “connected” are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. “Up”, “down”, “left”, “right” and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0067] Figure 1 This is a schematic diagram of the local structure of a display panel. Figure 1As shown, the display panel includes an array substrate 10, a functional device layer 20 and an ambient light sensor 30. The functional device layer 20 and the ambient light sensor 30 are located on opposite sides of the array substrate 10. The functional device layer 20 includes a fingerprint sensor 21 and a plurality of light-emitting devices 22. The light-emitting device 22 is used to emit light. The brightness and color of the light-emitting devices 22 cooperate with each other to form a picture. When a finger approaches or presses on the surface of the display panel, the light emitted by the light-emitting device 22 will reflect the finger, and the fingerprint sensor 21 can detect the light reflected by the finger to perform fingerprint recognition. The ambient light passes through the functional device layer 20 and the array substrate 10 and is received by the ambient light sensor 30. The ambient light sensor 30 detects the intensity of the ambient light based on the received ambient light.

[0068] To detect ambient light intensity, an ambient light sensor 30 is provided on the bottom surface of the array substrate 10, which increases the thickness of the display panel. Furthermore, when such a display panel is used in a display device, such as a mobile phone, the ambient light sensor 30 must be separately provided with a flexible printed circuit board or other structure connected to the printed circuit board, which not only increases cost but also requires a larger space for its placement.

[0069] Figure 2 This is a top view of a display panel provided by an embodiment of the present disclosure. Figure 3 yes Figure 2 The Ⅰ-Ⅰ cross-section diagram in FIG. Figure 3 As shown, the display panel includes an array substrate 10 and a functional device layer 20, wherein the functional device layer 20 is located on the supporting surface of the array substrate 10. The supporting surface of the array substrate 10 refers to the side of the array substrate 10 where a plurality of thin film transistors are arrayed.

[0070] The functional device layer 20 includes a first photosensitive device 23 , a second photosensitive device 24 , and a plurality of light-emitting devices 22 .

[0071] Figure 4 yes Figure 3 Schematic diagram of the local structure in . Figure 4 As shown, the first photosensor 23 is used to detect light emitted by the light-emitting device 22 that is reflected by a finger. The first photosensor 23 includes a first photosensitive layer 231, a first electrode 232, and a second electrode 233. The first electrode 232 and the second electrode 233 are located on opposite sides of the first photosensitive layer 231, that is, the first photosensitive layer 231 is located between the first electrode 232 and the second electrode 233. In some examples, the surface of the first photosensitive layer 231 is in direct contact with the first electrode 232 and the second electrode 233. In other examples, other structures may be provided on the surface of the first photosensitive layer 231, between the first photosensitive layer 231 and the first electrode 232, and between the first photosensitive layer 231 and the second electrode 233. The first electrode 232 is located on the side of the first photosensitive layer 231 that is closest to the array substrate 10.

[0072] The second photosensor 24 is used to detect the intensity of ambient light. The second photosensor 24 includes a second photosensitive layer 241, a third electrode 242, and a fourth electrode 243. The second photosensitive layer 241 is layered with the first photosensitive layer 231, the third electrode 242 is layered with the first electrode 232, and the fourth electrode 243 is layered with the second electrode 233.

[0073] The first photosensor 23 detects light emitted by the light-emitting device 22 that is reflected by the finger for fingerprint recognition, while the second photosensor 24 detects the intensity of ambient light. By arranging the first photosensitive layer 231, first electrode 232, and second electrode 233 of the first photosensor 23 in the same layer as the second photosensitive layer 241, third electrode 242, and fourth electrode 243 of the second photosensor 24, the thickness of the display panel can be reduced compared to placing the ambient light sensor below the display panel, that is, placing the ambient light sensor on the side of the array substrate 10 away from the functional device layer 20. Furthermore, when the ambient light sensor is arranged in the same layer, the structures on the same layer can be manufactured together during the manufacturing process, saving process steps and reducing production costs. Furthermore, since the ambient light sensor is eliminated, there is no need for a flexible circuit board or other structure to connect the ambient light sensor to the printed circuit board, which reduces costs and saves internal space in the display device.

[0074] like Figure 3 As shown, the display panel further includes a color filter layer 50, which is located on the side of the functional device layer 20 away from the array substrate 10. The color filter layer 50 includes a plurality of color blocks 51 arranged in an array and a light shielding structure 52 located between the plurality of color blocks 51. The light emitting device 22 is opposite to the color blocks 51.

[0075] The color filter layer 50 includes color blocks 51 of various colors. Figure 3 Different fillings are used as a distinction. The color blocks 51 of multiple colors may include, for example, a red color block 51, a green color block 51, and a blue color block 51. Each light-emitting device 22 is opposite to a color block 51. The "opposite" shown in the embodiment of the present disclosure means that the orthographic projections of the two are at least partially overlapped on the supporting surface of the array substrate 10. For example, the light-emitting device 22 is opposite to the color block 51, which means that the orthographic projection of the light-emitting device 22 on the supporting surface of the array substrate 10 is at least partially overlapped with the orthographic projection of the color block 51 on the supporting surface of the array substrate 10. The light emitted by the light-emitting device 22 is irradiated to the opposite color block 51 and is transmitted.

[0076] The light emitting device 22 may be an organic light emitting diode (OLED), which emits light of the same color as the corresponding color block 51 .

[0077] like Figure 3As shown, the functional device layer 20 also includes a color temperature sensor. The color temperature sensor includes a third photosensor 25, a fourth photosensor 26, and a fifth photosensor 27. The third photosensor 25, the fourth photosensor 26, and the fifth photosensor 27 are respectively opposite to color blocks 51 of different colors. By providing a color temperature sensor to detect the color temperature of the ambient light, the display panel can adjust the display effect according to the color temperature of the ambient light.

[0078] For example, the third photosensor 25 is opposite to the red color block 51, the fourth photosensor 26 is opposite to the green color block 51, and the fifth photosensor 27 is opposite to the blue color block 51. When ambient light strikes the red color block 51, the red light in the ambient light is transmitted and strikes the third photosensor 25, while the light of other colors is absorbed by the red color block 51. When ambient light strikes the green color block 51, the green light in the ambient light is transmitted and strikes the fourth photosensor 26, while the light of other colors is absorbed by the green color block 51. When ambient light strikes the blue color block 51, the blue light in the ambient light is transmitted and strikes the fifth photosensor 27, while the light of other colors is absorbed by the blue color block 51.

[0079] The third photosensor 25, the fourth photosensor 26, and the fifth photosensor 27 detect red, green, and blue light in the ambient light, respectively. The color temperature can be determined based on the ratio of the electrical signals generated by the third photosensor 25, the fourth photosensor 26, and the fifth photosensor 27. The ratio of the electrical signals generated by the third photosensor 25, the fourth photosensor 26, and the fifth photosensor 27 is the same as the ratio of the tristimulus values. The tristimulus values, also known as tristimulus values, include the red primary color stimulus value, the green primary color stimulus value, and the blue primary color stimulus value, denoted as X, Y, and Z, respectively. The color coordinates (x, y) can be determined based on the tristimulus values. For example, the color coordinates can be determined using the following relationship:

[0080] x=X / (X+Y+Z) (1)

[0081] y=Y / (X+Y+Z) (2)

[0082] Therefore, the color temperature can also be determined based on the ratio of the signal amounts of the electrical signals generated by the third photosensor 25 , the fourth photosensor 26 , and the fifth photosensor 27 .

[0083] The color temperature is then determined based on the color coordinates, for example, using the following relationship:

[0084] CCT=437n 3 +3601n 2 +6831n+5517 (3)

[0085] n=(x-0.3320) / (0.1858-y) (4)

[0086] Among them, CCT is color temperature.

[0087] The color temperature sensor can be arranged adjacent to the second photosensor 24. Since there are no light-emitting devices in the display panel's area where the second photosensor 24 and the color temperature sensor are located, meaning no display is performed, arranging the color temperature sensor and the second photosensor 24 together can prevent the color temperature sensor and the second photosensor 24 from affecting the display of images in other areas, thereby facilitating the integrity of the display panel's display.

[0088] like Figure 4 As shown, the third photosensitive device 25 includes a third photosensitive layer 251, a fifth electrode 252, and a sixth electrode 253. The fourth photosensitive device 26 includes a fourth photosensitive layer 261, a seventh electrode 262, and an eighth electrode 263. The fifth photosensitive device 27 includes a fifth photosensitive layer 271, a ninth electrode 272, and a tenth electrode 273.

[0089] The third photosensitive layer 251, the fourth photosensitive layer 261, and the fifth photosensitive layer 271 are all formed in the same layer as the first photosensitive layer 231. The fifth electrode 252, the seventh electrode 262, and the ninth electrode 272 are all formed in the same layer as the first electrode 232. The sixth electrode 253, the eighth electrode 263, and the tenth electrode 273 are all formed in the same layer as the second electrode 233.

[0090] By arranging parts of the first photosensor 23 , the second photosensor 24 , the third photosensor 25 , the fourth photosensor 26 and the fifth photosensor 27 in the same layer, the provision of the color temperature sensor does not increase the thickness of the display panel.

[0091] like Figure 3 As shown, the light shielding structure 52 also has a fingerprint hole 52a and an ambient light hole 52b. Figure 3 and Figure 4 As shown, the first photosensitive layer 231 is opposite to the fingerprint hole 52a, and the second photosensitive layer 241 is opposite to the ambient light hole 52b.

[0092] Since the first photosensitive layer 231 is opposite to the fingerprint hole 52a, the light emitted by the light emitting device 22 reflected by the finger can be irradiated to the first photosensitive layer 231 through the fingerprint hole 52a, so that the first photosensitive device 23 can detect the light emitted by the light emitting device 22 reflected by the finger.

[0093] Since the second photosensitive layer 241 is opposite to the ambient light hole 52 b , ambient light can irradiate the second photosensitive layer 241 through the ambient light hole 52 b , so that the second photosensitive device 24 can detect the ambient light.

[0094] Figure 5 FIG. 1 is a schematic diagram of the cooperation between the second photosensitive layer and the color filter layer provided by the embodiment of the present disclosure. Figure 5As shown, the ratio of the width d of the ambient light hole 52b to the width D of the second photosensitive layer 241 is 0.5 to 1.5. The width directions of the ambient light hole 52b and the second photosensitive layer 241 are both parallel to the supporting surface of the array substrate 10 and located in the reference plane. The reference plane referred to here is a plane perpendicular to the supporting surface of the array substrate 10 and passing through the center of the ambient light hole 52b. Figure 3 and Figure 5 The center of the ambient light hole 52b refers to a straight line passing through the geometric center of the ambient light hole 52b and perpendicular to the surface of the color filter layer 50 close to or away from the functional device layer 20.

[0095] For example, if the ambient light hole 52b is a circular hole, the center of the ambient light hole 52b is a straight line passing through the center of the circle of the ambient light hole 52b and perpendicular to the surface of the color filter layer 50 close to or away from the functional device layer 20. In some examples, the ambient light hole 52b can also be a rectangular hole. Here, a circular hole is used as an example.

[0096] By controlling the relative sizes of the width of the ambient light hole 52b and the width of the second photosensitive layer 241, the second photosensitive layer 241 can receive a sufficient area of ​​light, while avoiding the ambient light hole 52b being set too large to produce other adverse effects, such as light leakage from the light-emitting device 22 that is obliquely projected from the ambient light hole 52b to the outside of the display panel.

[0097] Exemplarily, the width D of the second photosensitive layer 241 is 5 μm to 80 μm.

[0098] The second photosensitive device 24, the third photosensitive device 25, the fourth photosensitive device 26, and the fifth photosensitive device 27 are all configured to receive ambient light, while the ambient light aperture 52b, the color block 51 opposite the third photosensitive layer 251, the color block 51 opposite the fourth photosensitive layer 261, and the color block 51 opposite the fifth photosensitive layer 271 are all configured to transmit ambient light. To ensure that the second photosensitive device 24, the third photosensitive device 25, the fourth photosensitive device 26, and the fifth photosensitive device 27 receive sufficient light and to prevent light leakage, the widths of the second photosensitive layer 241, the third photosensitive layer 251, the fourth photosensitive layer 261, and the fifth photosensitive layer 271 can be equal. The ambient light aperture 52b, the color block 51 opposite the third photosensitive layer 251, the color block 51 opposite the fourth photosensitive layer 261, and the color block 51 opposite the fifth photosensitive layer 271 can also be equal. The width of the color block 51 opposite to the light emitting device 22 may also be equal to the width of the ambient light hole 52 b , so that all the color blocks 51 are equal in size, which facilitates the production of the color filter layer 50 .

[0099] like Figure 5, which is a cross section taken from a reference plane. The center of the color block 51 closest to the ambient light hole 52b is located in the reference plane. In the disclosed embodiment, the color block 51 closest to the ambient light hole 52b is the color block 51 opposite the third photosensitive layer 251.

[0100] In this example, the width d of the ambient light hole 52b is not greater than the width D of the second photosensitive layer 241. The ambient light hole 52b and the color block 51 closest to the ambient light hole 52b satisfy the following relationship:

[0101] tanα=(PD) / h (5)

[0102] tanβ=(P+D) / h (6)

[0103] Wherein, P is the distance between the center of the ambient light hole 52b and the center of the nearest color block 51 in a direction parallel to the carrying surface of the array substrate 10, h is the distance between the color block 51 and the second photosensitive layer 241 in a direction perpendicular to the carrying surface of the array substrate 10, 0<α<β≤42°, α and β are the refraction angles of the light when the ambient light is irradiated on the display panel and refracted into the interior of the display panel.

[0104] In some other examples, the width d of the ambient light hole 52b is greater than the width D of the second photosensitive layer 241. The ambient light hole 52b and the closest color block 51 satisfy the following relationship:

[0105] tanα=(Pd) / h (7)

[0106] tanβ=(P+d) / h (8)

[0107] Among them, 0<α<β≤42°.

[0108] By setting the distance P, the distance h, and the widths d and D to satisfy the aforementioned relationship, it is possible to prevent light transmitted by the color block 51 from irradiating the second photosensitive layer 241 and affecting the detection accuracy of the second photosensor 24. Similarly, it is possible to prevent light transmitted by the ambient light aperture 52b from irradiating the third photosensitive layer 251 and affecting the detection accuracy of the third photosensor 25.

[0109] like Figure 2 As shown, the array substrate 10 includes a display area 101 and a peripheral area 102 surrounding the display area 101. The light emitting device 22 and the first photosensitive device 23 are both located in the display area 101.

[0110] The light emitting device 22 is arranged in the display area 101 to display images. The first photosensitive device 23 is arranged in the display area 101 so that the first photosensitive device 23 is close to the light emitting device 22. When the user's finger presses on the display area 101, the light emitted by the light emitting device 22 can be reflected by the finger and illuminate the first photosensitive device 23 through the fingerprint hole 52a.

[0111] For example, there are multiple first photosensitive devices 23, and the multiple first photosensitive devices 23 can be distributed among the multiple light-emitting devices 22 in the display area 101. The multiple first photosensitive devices 23 are distributed in a larger area, which can increase the area for fingerprint recognition.

[0112] like Figure 4 As shown, the light emitting device 22 includes an anode 221, a light emitting layer 222, and a cathode 223. The anode 221 and the cathode 223 are located on opposite sides of the light emitting layer 222, and the anode 221 is located on the side of the light emitting layer 222 close to the array substrate 10. The anode 221 and the second electrode 233 are on the same layer.

[0113] The thickness of the display panel is further reduced by arranging the anode 221 of the light emitting device 22 and the second electrode 233 of the first photosensitive device 23 in the same layer. Moreover, the same layer arrangement allows the anode 221 and the second electrode 233 to be manufactured together, saving process steps and reducing production costs.

[0114] Figure 6 FIG. 1 is a partial structural diagram of a display panel provided by an embodiment of the present disclosure. Figure 6 As shown, in some examples, the second photosensor 24 and the color temperature sensor are both located in the display area 101 .

[0115] In the display device, the display area 101 is not blocked by the frame. By arranging the second photosensor 24 and the color temperature sensor in the display area 101, it is possible to prevent the frame from blocking the second photosensor 24 and the color temperature sensor and affecting the detection of ambient light.

[0116] When the second photosensor 24 and the color temperature sensor are arranged in the display area 101 , they can be arranged near the junction of the display area 101 and the peripheral area 102 to prevent the second photosensor 24 and the color temperature sensor from affecting the integrity of the display image.

[0117] One second photosensor 24 and one color temperature sensor constitute one unit. There may be multiple second photosensors 24 and multiple color temperature sensors. Multiple second photosensors 24 and multiple color temperature sensors constitute multiple units.

[0118] In some examples, such as Figure 6As shown, in the same unit, the second photosensitive device 24, the third photosensitive device 25, the fourth photosensitive device 26 and the fifth photosensitive device 27 are arranged in a row along the intersection of the display area 101 and the peripheral area 102, and multiple units are arranged in multiple rows at the center of the intersection.

[0119] Figure 7 is a partial structural diagram of a display panel provided by an embodiment of the present disclosure. In other examples, for example Figure 7 As shown, in the same unit, the second photosensitive device 24, the third photosensitive device 25, the fourth photosensitive device 26, and the fifth photosensitive device 27 are arranged in two rows and two columns. Multiple units are arranged along the boundary between the display area 101 and the peripheral area 102, and in the center of the boundary, multiple units can be arranged in multiple rows and columns.

[0120] In other examples, the second photosensor 24 and the color temperature sensor are both located in the peripheral area 102. Figure 3 As shown, the second photosensitive device 24 , the third photosensitive device 25 , the fourth photosensitive device 26 and the fifth photosensitive device 27 are all located in the peripheral region 102 .

[0121] Placing both the second photosensor 24 and the color temperature sensor in the peripheral area can increase the display area of ​​the display area 101. In a display device, the peripheral area 102 is typically blocked by a frame. When arranging the second photosensor 24 and the color temperature sensor in the peripheral area 102, a light-transmitting area can be provided on the frame to allow the second photosensor 24 and the color temperature sensor to properly receive ambient light.

[0122] Reference Figure 3 As shown, the array substrate 10 includes a base substrate, a first buffer layer Buffer1, a first gate insulating layer GI1, a second gate insulating layer GI2, an interlayer dielectric layer ILD, and a first insulating layer PVX1 stacked in sequence. The base substrate includes a backplane 11 and a flexible substrate 12. The array substrate 10 also includes a plurality of thin film transistors 13 located on the first buffer layer Buffer1. Among the plurality of thin film transistors 13, some thin film transistors 13 are connected to the light emitting device 22, and the thin film transistors 13 connected to the light emitting device 22 can be dual-gate thin film transistors. Among the other thin film transistors 13, the first thin film transistor 131 is connected to the first photosensitive device 23, the second thin film transistor 132 is connected to the second photosensitive device 24, the third thin film transistor 133 is connected to the third photosensitive device 25, the fourth thin film transistor 134 is connected to the fourth photosensitive device 26, and the fifth thin film transistor 135 is connected to the fifth photosensitive device 27.

[0123] The functional device layer 20 includes a first planarization layer PLN1, a second insulating layer PVX2, a transparent protective layer cover, a second planarization layer PLN2, a pixel definition layer PDL, a first inorganic encapsulation layer CVD1, an organic encapsulation layer IJP, and a second inorganic encapsulation layer CVD2, which are stacked in sequence. The functional device layer 20 also includes a light-emitting device 22, a first photosensitive device 23, a second photosensitive device 24, a third photosensitive device 25, a fourth photosensitive device 26, and a fifth photosensitive device 27.

[0124] like Figure 4 As shown, the first electrode 232 of the first photosensitive device 23, the third electrode 242 of the second photosensitive device 24, the fifth electrode 252 of the third photosensitive device 25, the seventh electrode 262 of the fourth photosensitive device 26, and the ninth electrode 272 of the fifth photosensitive device 27 are on the same layer and are all located on the second insulating layer PVX2. The first electrode 232 of the first photosensitive device 23, the third electrode 242 of the second photosensitive device 24, the fifth electrode 252 of the third photosensitive device 25, the seventh electrode 262 of the fourth photosensitive device 26, and the ninth electrode 272 of the fifth photosensitive device 27 are respectively connected to the source or drain of the corresponding thin film transistor 13 in the array substrate 10 through via holes.

[0125] The second insulating layer PVX2 also has a plurality of transition electrodes 281 , which are on the same layer as the first electrode 232 of the first photosensitive device 23 . The transition electrodes 281 are used to connect the light-emitting device 22 and the source or drain of the thin film transistor 13 corresponding to the light-emitting device 22 in the array substrate 10 .

[0126] like Figure 4 As shown, the first photosensitive layer 231, the second photosensitive layer 241, the third photosensitive layer 251, the fourth photosensitive layer 261 and the fifth photosensitive layer 271 are respectively located on the first electrode 232, the second electrode 233, the third electrode 242, the fourth electrode 243 and the fifth electrode 252. The first photosensitive layer 231, the second photosensitive layer 241, the third photosensitive layer 251, the fourth photosensitive layer 261 and the fifth photosensitive layer 271 have the same structure. For example, Figure 8 FIG. 1 is an enlarged schematic diagram of a first photosensitive device provided by an embodiment of the present disclosure. Figure 8 As shown, the first photosensitive layer 231 includes a PIN photosensitive material layer 2411 located on the first electrode 232 and an indium tin oxide layer 2412 located on the PIN photosensitive material layer 2411. The PIN photosensitive material layer 2411 is a stacked structure including a P-type semiconductor, an intrinsic semiconductor and an N-type semiconductor.

[0127] The transparent protective layer cover is located on the surface of the first photosensitive layer 231, the second photosensitive layer 241, the third photosensitive layer 251, the fourth photosensitive layer 261 and the fifth photosensitive layer 271 away from the array substrate 10 to play a protective role and avoid damage to the first photosensitive layer 231, the second photosensitive layer 241, the third photosensitive layer 251, the fourth photosensitive layer 261 and the fifth photosensitive layer 271 during the manufacture of subsequent structures.

[0128] like Figure 4 As shown, the second electrode 233 of the first photosensitive device 23, the fourth electrode 243 of the second photosensitive device 24, the sixth electrode 253 of the third photosensitive device 25, the eighth electrode 263 of the fourth photosensitive device 26, and the tenth electrode 273 of the fifth photosensitive device 27 are on the same layer and are all located on the second planarization layer PLN2. The transparent protective layer cover has a plurality of via holes 291, and the second electrode 233, the fourth electrode 243, the sixth electrode 253, the eighth electrode 263, and the tenth electrode 273 are respectively connected to the first photosensitive layer 231, the second photosensitive layer 241, the third photosensitive layer 251, the fourth photosensitive layer 261, and the fifth photosensitive layer 271 through the via holes 291.

[0129] The anode 221 of the light emitting device 22 is also in the same layer as the second electrode 233. The anode 221 is connected to the transition electrode 281 through a via hole.

[0130] like Figure 3 As shown, the light emitting layer 222 of the light emitting device 22 is located in the pixel opening of the pixel definition layer PDL, and the cathode 223 of the light emitting device 22 is located on the pixel definition layer PDL and connected to the light emitting layer 222 .

[0131] The display panel also includes a touch layer 40. The touch layer 40 may include a second buffer layer Buffer2, a touch circuit 41 located on the second buffer layer Buffer2, and a first cover layer OC1. The first cover layer OC1 is thicker in the peripheral area 102 of the array substrate 10 than in the display area 101, ensuring a smooth surface away from the array substrate 10.

[0132] The color filter layer 50 includes a color block 51 and a light shielding structure 52 located on the first cover layer OC1 , and a second cover layer OC2 located on the color block 51 and the light shielding structure 52 .

[0133] The display panel also includes a first optical adhesive layer (OCA1) on the second cover layer (OC2), ultra-thin glass (UTG), a second optical adhesive layer (OCA2), and a PET cover layer. The UTG is adhered to the color filter layer 50 via the first optical adhesive layer (OCA1), and the PET cover layer is adhered to the UTG via the second optical adhesive layer (OCA2).

[0134] The cover PET can be made of a flexible material, such as polyethylene terephthalate.

[0135] Figure 9 FIG. 1 is a schematic diagram of a circuit structure of a second photosensor and a color temperature sensor provided by an embodiment of the present disclosure. Figure 9 As shown, the second photosensor 24 , the third photosensor 25 , the fourth photosensor 26 and the fifth photosensor 27 are respectively connected to the second thin film transistor 132 , the third thin film transistor 133 , the fourth thin film transistor 134 and the fifth thin film transistor 135 in the plurality of thin film transistors 13 .

[0136] The substrate includes a first signal line 141, a second signal line 142, a first gate line 143, and a second gate line 144. The first signal line 141 and the second signal line 142 are parallel to each other, and the first gate line 143 and the second gate line 144 are parallel to each other. The first signal line 141 crosses the first gate line 143 and is insulated from each other.

[0137] The first electrode of the second thin-film transistor 132 is connected to the first signal line 141, the second electrode of the second thin-film transistor 132 is connected to the third electrode 242 of the second photosensitive device 24, the gate of the second thin-film transistor 132 is connected to the first gate line 143, and the fourth electrode 243 of the second photosensitive device 24 is connected to the first bias signal line Bias1. The first bias signal line Bias1 can be on the same layer as the fourth electrode 243 of the second photosensitive device 24. One of the first electrode and the second electrode is a source electrode, and the other is a drain electrode.

[0138] The first electrode of the third thin film transistor 133 is connected to the second signal line 142, the second electrode of the third thin film transistor 133 is connected to the fifth electrode 252 of the third photosensitive device 25, the gate of the third thin film transistor 133 is connected to the first gate line 143, and the sixth electrode 253 of the third photosensitive device 25 is connected to the first bias signal line Bias1.

[0139] A first electrode of the fourth thin-film transistor 134 is connected to the first signal line 141, a second electrode of the fourth thin-film transistor 134 is connected to the seventh electrode 262 of the fourth photosensitive device 26, a gate electrode of the fourth thin-film transistor 134 is connected to the second gate line 144, and an eighth electrode 263 of the fourth photosensitive device 26 is connected to the second bias signal line Bias2. The second bias signal line Bias2 can be on the same layer as the first bias signal line Bias1.

[0140] The first electrode of the fifth thin film transistor 135 is connected to the second signal line 142, the second electrode of the fifth thin film transistor 135 is connected to the ninth electrode 272 of the fifth photosensitive device 27, the gate of the fifth thin film transistor 135 is connected to the second gate line 144, and the tenth electrode 273 of the fifth photosensitive device 27 is connected to the second bias signal line Bias2.

[0141] The first signal line 141, the second signal line 142, the first gate line 143, the second gate line 144, the first bias signal line Bias1, and the second bias signal line Bias2 are connected to a driver chip IC. For example, in some examples, they can be connected to a driver chip for fingerprint recognition, that is, they share a driver chip with the first photosensitive device 23. In other examples, they can also be connected to an independent driver chip, that is, they do not share a driver chip with the first photosensitive device 23.

[0142] The present disclosure also provides a display device having the following features: Figures 2 to 9 Any of the display panels shown. The display device can be, but is not limited to, a mobile phone, a laptop computer, a tablet computer, a monitor, a navigator, or a digital camera. Taking a mobile phone as an example, the display device can be a foldable touch screen mobile phone.

[0143] Figure 10 This is a flow chart of a method for manufacturing a display panel provided by an embodiment of the present disclosure. Figures 2 to 9 The display panel shown. Figure 11 This is a schematic diagram of a manufacturing process of a display panel provided by an embodiment of the present disclosure. Figure 11 As shown, the method includes:

[0144] In step S11 , an array substrate 10 is provided.

[0145] In step S12 , a first electrode layer is formed on the supporting surface of the array substrate 10 .

[0146] The first electrode layer includes a first electrode 232 and a third electrode 242 .

[0147] In step S13 , a photosensitive layer is formed on the first electrode layer.

[0148] The photosensitive layer includes a first photosensitive layer 231 located on the first electrode 232 and a second photosensitive layer 241 located on the third electrode 242 .

[0149] In step S14 , a second electrode layer is formed on the photosensitive layer.

[0150] The second electrode layer includes a second electrode 233 located on the first photosensitive layer 231 and a fourth electrode 243 located on the second photosensitive layer 241 , thereby forming a first photosensitive device 23 and a second photosensitive device 24 on the supporting surface of the array substrate 10 .

[0151] In step S15 , a plurality of light emitting devices 22 are formed.

[0152] A functional device layer 20 including a first photosensitive device 23 , a second photosensitive device 24 and a plurality of light-emitting devices 22 is formed on the supporting surface of the array substrate 10 .

[0153] When the display panel also includes a color temperature sensor, in step S12, the first electrode layer formed also includes a fifth electrode 252, a seventh electrode 262, and a ninth electrode 272. In step S13, the photosensitive layer formed also includes a third photosensitive layer 251, a fourth photosensitive layer 261, and a fifth photosensitive layer 271. In step S14, the second electrode layer formed also includes a sixth electrode 253, an eighth electrode 263, and a tenth electrode 273. The second electrode layer may also include the anode 221 of the light-emitting device 22, that is, the anode 221 of the light-emitting device 22 is also in the same layer as the second electrode 233.

[0154] By arranging the first photosensitive layer 231, first electrode 232, and second electrode 233 of the first photosensitive device 23 in the same layer as the second photosensitive layer 241, third electrode 242, and fourth electrode 243 of the second photosensitive device 24, the overall thickness of the display panel can be reduced compared to placing the ambient light sensor on a side of the array substrate 10 away from the functional device layer 20. Furthermore, when arranged in the same layer, the structures on the same layer are manufactured together during the manufacturing process, simplifying the process and reducing production costs. Furthermore, since the ambient light sensor is eliminated, there is no need to install a flexible circuit board or other structure to connect the ambient light sensor to the printed circuit board, reducing costs and conserving internal space in the display device.

[0155] Figure 12 This is a flow chart of a method for detecting ambient light intensity provided by an embodiment of the present disclosure. Figures 2 to 9 The display panel shown. The method includes:

[0156] In step S21, the first ambient light intensity is determined based on the relationship between the signal amount of the electrical signal generated by the second photosensor 24 within the first integration time and the ambient light intensity, and the actual signal amount of the electrical signal generated by the second photosensor 24 within the first integration time.

[0157] In step S22 , a second integration time period is determined according to the first ambient light intensity.

[0158] Among them, the second integral time is longer than the first integral time.

[0159] In step S23, the second ambient light intensity is determined based on the relationship between the signal amount of the electrical signal generated by the second photosensor 24 within the second integration time and the ambient light intensity, and the actual signal amount of the electrical signal generated by the second photosensor 24 within the second integration time.

[0160] In the embodiment of the present disclosure, when detecting the intensity of ambient light, two detections are performed. In the first detection, the intensity of the ambient light is preliminarily determined based on the signal amount of the electrical signal generated within the first integration period. Then, based on the detection result, the integration period is adjusted to determine a second integration period that is longer than the first integration period. In the second detection, a second ambient light intensity with higher accuracy is determined based on the signal amount of the electrical signal generated within the second integration period, thereby improving the accuracy of ambient light detection.

[0161] Figure 13 This is a flow chart of another ambient light intensity detection method provided by an embodiment of the present disclosure. Figures 2 to 9 The display panel shown. The method includes:

[0162] In step S31 , the signal amount of the first electrical signal generated by the second photosensor 24 within a first integration time period under ambient light illumination is obtained.

[0163] For example, the signal amount can be the amount of charge. Within the same integration time, the greater the signal amount of the electrical signal generated by the second photosensor 24, the stronger the ambient light. In other words, when the integration time is fixed, there is a corresponding relationship between the signal amount of the generated electrical signal and the intensity of the ambient light. By detecting the signal amount of the electrical signal and combining this corresponding relationship, the intensity of the ambient light can be determined.

[0164] Under the same ambient light conditions, the longer the integration time, the greater the magnitude of the electrical signal generated by the second photosensor 24 during that time. When detecting ambient light intensity with a long integration time, even small changes in ambient light intensity can result in significant changes in the magnitude of the electrical signal generated by the second photosensor 24 during that time. Therefore, a longer integration time improves detection accuracy. However, since the second photosensor 24 gradually saturates during illumination, the magnitude of the electrical signal reaches its maximum value and then ceases to increase. Therefore, a longer integration time increases the likelihood that the second photosensor 24 will reach saturation, reducing the maximum detectable ambient light intensity and, in other words, the detection range.

[0165] For example, Figure 14 is a curve showing the relationship between the signal quantity of the electrical signal generated by the second photosensitive device and the ambient light intensity provided by the embodiment of the present disclosure. Figure 14As shown in the figure, the relationship curves of the signal intensity of the electrical signal generated by the second photosensor 24 and the ambient light intensity under four different integration time lengths are shown as examples, respectively marked as Relationship Curve A, Relationship Curve B, Relationship Curve C, and Relationship Curve D. The first integration time length is the default integration time length for ambient light detection in the display panel and can be the shortest of the multiple integration time lengths, such as 0.065ms. At the first integration time length, the second photosensor 24 has the maximum range.

[0166] In step S32 , the first ambient light intensity is determined based on the relationship between the signal amount of the electrical signal generated by the second photosensor 24 in the first integration time and the ambient light intensity, and the signal amount of the first electrical signal.

[0167] For example, the relationship between the signal amount of the electrical signal generated by the second photosensor 24 during the first integration time and the ambient light intensity can be expressed as follows: Figure 14 The first ambient light intensity can be determined by combining the signal amount of the first electrical signal with the relationship curve D.

[0168] In step S33 , according to the correspondence between the ambient light intensity intervals and the integration time periods, the integration time period corresponding to the interval containing the first ambient light intensity is determined as the second integration time period.

[0169] The range of ambient light intensity is determined by a plurality of preset different integration time lengths. For the plurality of integration time lengths from large to small, the second photosensor 24 has a plurality of ranges from small to large, and 0 and the maximum measurement value of each of the plurality of ranges form a plurality of intervals. For example, Figure 14 The four integration time lengths from large to small correspond to four ranges, namely 0~100lx (lux), 0~1klx (kilolux), 0~8klx, ​​and 0~50klx. The maximum measurement values ​​of these four ranges are 100lx, 1klx, 8klx, ​​and 50klx respectively. 0 and 100lx, 1klx, 8klx, ​​and 50klx form four ambient light intensity intervals, namely 0~100lx, 100lx~1klx, 1klx~8klx, ​​and 8klx~50klx respectively.

[0170] Assuming that the first ambient light intensity is determined to be 500 lx in step S32, the interval including the first ambient light intensity is 100 lx to 1 klx, the integration time corresponding to the interval is 2.5 ms, and therefore the second integration time is 2.5 ms.

[0171] In step S34 , the signal amount of the second electrical signal generated by the second photosensor 24 within the second integration time period under the irradiation of ambient light is obtained.

[0172] In step S35 , the second ambient light intensity is determined based on the relationship between the signal amount of the electrical signal generated by the second photosensor 24 in the second integration time and the ambient light intensity, and the signal amount of the second electrical signal.

[0173] Since the second integration time determined in step S33 is 2.5 ms, the relationship between the signal amount of the electrical signal generated by the second photosensor 24 in the second integration time and the ambient light intensity can be expressed as follows: Figure 14 The relationship curve B in FIG3 is used to determine the second ambient light intensity according to the signal amount of the second electrical signal determined in step S34 and the relationship curve B.

[0174] Since the measurement range of the second photosensor 24 is 0-50klx when the integration time is 0.065ms, and the measurement range of the second photosensor 24 is 0-1klx when the integration time is 2.5ms, the measured ambient light intensity is more accurate when the integration time is 2.5ms.

[0175] The embodiment of the present disclosure is described by only presetting four ambient light intensity intervals as an example. In other examples, more ambient light intensity intervals may be preset to improve detection accuracy, or fewer ambient light intensity intervals may be preset to reduce costs.

[0176] After detecting the ambient light intensity, the display panel can adjust the display brightness based on the ambient light intensity. For example, a higher brightness is used when the ambient light intensity is high, and a lower brightness is used when the ambient light intensity is low. In other words, the display panel's display brightness increases as the ambient light intensity increases. Different display panels can have different brightness adjustment precisions to meet the needs of different users. For example, when the ambient light intensity is between 1lx and 10lx, the display panel uses the same brightness. That is, when the ambient light intensity is 5lx and 8lx, the display panel's brightness is the same. As an example, four to five brightness levels can be set in each ambient light intensity range. For example, the same brightness is used when the ambient light intensity is between 0 and 1lx, the same brightness is used when the ambient light intensity is between 1lx and 10lx, the same brightness is used when the ambient light intensity is between 10lx and 50lx, and the same brightness is used when the ambient light intensity is between 50lx and 100lx.

[0177] In the embodiment of the present disclosure, by Figure 3 The display panel with the structure shown in the figure is tested. As the display panel under test, the range of the ambient light intensity is as follows Figure 14 As shown, when the second ambient light intensity is determined based on relationship curve A, relationship curve B, relationship curve C and relationship curve D respectively, the signal-to-noise ratios are 7.2, 2, 2.1 and 3.4 respectively, all of which are not less than 2, and the resolution meets the requirement.

[0178] Figure 15 This is a structural block diagram of an ambient light intensity detection device provided by an embodiment of the present disclosure. Figure 15 As shown, the ambient light intensity detection device includes a light intensity determination module 151 and a duration determination module 152. The light intensity determination module 151 is used to determine the first ambient light intensity based on the relationship between the signal amount of the electrical signal generated by the second photosensor 24 during the first integration duration and the ambient light intensity, as well as the actual signal amount of the electrical signal generated by the second photosensor 24 during the first integration duration. The duration determination module 152 is used to determine a second integration duration based on the first ambient light intensity, where the second integration duration is greater than the first integration duration. The light intensity determination module 151 is also used to determine the second ambient light intensity based on the relationship between the signal amount of the electrical signal generated by the second photosensor 24 during the second integration duration and the ambient light intensity, as well as the actual signal amount of the electrical signal generated by the second photosensor 24 during the second integration duration.

[0179] In some examples, the duration determination module 152 is configured to determine the integration duration corresponding to the interval containing the first ambient light intensity as the second integration duration based on a correspondence between ambient light intensity intervals and integration durations.

[0180] The ambient light intensity detection device is used to perform Figure 12 or Figure 13 The ambient light intensity detection method shown in FIG. The light intensity determination module 151 can be used to execute the aforementioned steps S21 and S23, or to execute the aforementioned steps S31, S32, S34, and S35; the duration determination module 152 can be used to execute the aforementioned step S22 or step S33.

[0181] Figure 16 The following is a block diagram of an ambient light intensity detection device according to an exemplary embodiment of the present invention. The ambient light intensity detection device 400 can be a smartphone, tablet computer, MP3 player (Moving Picture Experts Group Audio Layer III), MP4 player (Moving Picture Experts Group Audio Layer IV), laptop computer, or desktop computer. The ambient light intensity detection device may also be referred to as a user device, portable terminal, laptop terminal, desktop terminal, or other similar terminology.

[0182] Typically, the ambient light intensity detection device includes a processor 401 and a memory 402 .

[0183] The processor 401 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 401 may be implemented in at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), or PLA (Programmable Logic Array). The processor 401 may also include a main processor and a coprocessor. The main processor is a processor for processing data in the awake state, also known as a CPU (Central Processing Unit); the coprocessor is a low-power processor for processing data in the standby state. In some embodiments, the processor 401 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the processor 401 may also include an AI (Artificial Intelligence) processor, which is used to process computing operations related to machine learning.

[0184] The memory 402 may include one or more computer-readable storage media, which may be non-transitory. The memory 402 may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices and flash memory storage devices. In some embodiments, the non-transitory computer-readable storage medium in the memory 402 is used to store at least one instruction, which is executed by the processor 401 to implement the ambient light intensity detection method provided in the method embodiment of the present application.

[0185] In some embodiments, the ambient light intensity detection apparatus may optionally include a peripheral device interface 403 and at least one peripheral device. The processor 401, memory 402, and peripheral device interface 403 may be connected via a bus or signal lines. Each peripheral device may be connected to the peripheral device interface 403 via a bus, signal lines, or circuit boards. Specifically, the peripheral device may include at least one of a radio frequency circuit 404, a touchscreen display 405, a camera 406, an audio circuit 407, a positioning component 408, and a power supply 409.

[0186] The peripheral device interface 403 can be used to connect at least one I / O (Input / Output)-related peripheral device to the processor 401 and the memory 402. In some embodiments, the processor 401, the memory 402, and the peripheral device interface 403 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the processor 401, the memory 402, and the peripheral device interface 403 can be implemented on separate chips or circuit boards, which is not limited in this embodiment.

[0187] The radio frequency circuit 404 is used to receive and transmit RF (Radio Frequency) signals, also known as electromagnetic signals. The radio frequency circuit 404 communicates with communication networks and other communication devices via electromagnetic signals. The radio frequency circuit 404 converts electrical signals into electromagnetic signals for transmission, or converts received electromagnetic signals into electrical signals. Optionally, the radio frequency circuit 404 includes: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a user identity module card, etc. The radio frequency circuit 404 can communicate with other terminals via at least one wireless communication protocol. Such wireless communication protocols include, but are not limited to, metropolitan area networks, various generations of mobile communication networks (2G, 3G, 4G, and 5G), wireless local area networks, and / or WiFi (Wireless Fidelity) networks. In some embodiments, the radio frequency circuit 404 may also include circuits related to NFC (Near Field Communication), which is not limited in this application.

[0188] Display screen 405 is used to display a user interface (UI). This UI can include graphics, text, icons, videos, or any combination thereof. When display screen 405 is a touchscreen display, it can also capture touch signals on or above the surface of display screen 405. These touch signals can be input as control signals to processor 401 for processing. In this case, display screen 405 can also be used to provide virtual buttons and / or a virtual keyboard, also known as soft buttons and / or a soft keyboard. In some embodiments, display screen 405 can be a single display screen, serving as the front panel of the ambient light intensity detection device. In other embodiments, display screen 405 can be at least two, each provided on different surfaces of the ambient light intensity detection device or in a foldable design. In still other embodiments, display screen 405 can be a flexible display screen, provided on a curved or foldable surface of the ambient light intensity detection device. Display screen 405 can also be configured as a non-rectangular, irregular shape, i.e., a special-shaped screen. Display screen 405 can be made of materials such as LCD (Liquid Crystal Display) and OLED (Organic Light-Emitting Diode).

[0189] The camera assembly 406 is used to capture images or videos. Optionally, the camera assembly 406 includes a front camera and a rear camera. Typically, the front camera is set on the front panel of the terminal, and the rear camera is set on the back of the terminal. In some embodiments, there are at least two rear cameras, which are any one of a main camera, a depth of field camera, a wide-angle camera, and a telephoto camera, so as to realize the fusion of the main camera and the depth of field camera to realize the background blur function, the fusion of the main camera and the wide-angle camera to realize panoramic shooting and VR (Virtual Reality) shooting function or other fusion shooting functions. In some embodiments, the camera assembly 406 may also include a flash. The flash can be a single-color temperature flash or a dual-color temperature flash. A dual-color temperature flash refers to a combination of a warm light flash and a cold light flash, which can be used for light compensation at different color temperatures.

[0190] The audio circuit 407 may include a microphone and a speaker. The microphone is used to collect sound waves from the user and the environment, and convert the sound waves into electrical signals and input them into the processor 401 for processing, or input them into the radio frequency circuit 404 to achieve voice communication. For the purpose of stereo acquisition or noise reduction, there may be multiple microphones, which are respectively arranged at different parts of the ambient light intensity detection device. The microphone may also be an array microphone or an omnidirectional acquisition microphone. The speaker is used to convert the electrical signals from the processor 401 or the radio frequency circuit 404 into sound waves. The speaker may be a traditional thin film speaker or a piezoelectric ceramic speaker. When the speaker is a piezoelectric ceramic speaker, it can not only convert the electrical signals into sound waves audible to humans, but also convert the electrical signals into sound waves inaudible to humans for purposes such as ranging. In some embodiments, the audio circuit 407 may also include a headphone jack.

[0191] The positioning component 408 is used to locate the current geographic location of the ambient light intensity detection device to implement navigation or LBS (Location Based Service). The positioning component 408 can be a positioning component based on the US GPS (Global Positioning System), China's Beidou system, Russia's Greninja system, or the European Union's Galileo system.

[0192] Power supply 409 is used to power the various components of the ambient light intensity detection device. Power supply 409 can be AC ​​power, DC power, a disposable battery, or a rechargeable battery. When power supply 409 includes a rechargeable battery, the rechargeable battery can support wired charging or wireless charging. The rechargeable battery can also be used to support fast charging technology.

[0193] The above description is merely an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the scope of protection of the present disclosure.

Claims

1. A display panel, characterized in that: It comprises an array substrate (10), a functional device layer (20) and a color filter layer (50), wherein the functional device layer (20) is located on the bearing surface of the array substrate (10); The array substrate (10) comprises a display area (101) and a peripheral area (102) surrounding the display area (101); The functional device layer (20) includes a first photosensitive device (23), a second photosensitive device (24) and a plurality of light-emitting devices (22); The first photosensitive device (23) is used to detect light emitted by the light-emitting device (22) reflected by a finger, and comprises a first photosensitive layer (231), a first electrode (232), and a second electrode (233), wherein the first electrode (232) and the second electrode (233) are located on opposite sides of the first photosensitive layer (231), and the first electrode (232) is located on a side of the first photosensitive layer (231) close to the array substrate (10); The second photosensitive device (24) is used to detect the intensity of ambient light, and comprises a second photosensitive layer (241), a third electrode (242), and a fourth electrode (243); the second photosensitive layer (241) and the first photosensitive layer (231) are in the same layer; the third electrode (242) and the first electrode (232) are in the same layer; the fourth electrode (243) and the second electrode (233) are in the same layer; and the second photosensitive device (24) is located in the peripheral area (102); The color filter layer (50) is located on a side of the functional device layer (20) away from the array substrate (10), and the color filter layer (50) comprises a plurality of color blocks (51) distributed in an array and a light shielding structure (52) located between the plurality of color blocks (51), the light shielding structure (52) having an ambient light hole (52b), and the ambient light hole (52b) and the color block (51) closest to the ambient light hole (52b) satisfy the following relationship: When the width (d) of the ambient light hole (52b) is greater than the width (D) of the second photosensitive layer (241), tanα=(Pd) / h, tanβ=(P+d) / h; When the width (d) of the ambient light hole (52b) is not greater than the width (D) of the second photosensitive layer (241), tanα=(PD) / h, tanβ=(P+D) / h; Wherein, P is the distance between the center of the ambient light hole (52b) and the center of the nearest color block (51) in a direction parallel to the bearing surface of the array substrate (10), h is the distance between the color block (51) and the second photosensitive layer (241) in a direction perpendicular to the bearing surface of the array substrate (10), 0<α<β≤42°, α and β are respectively the refraction angles of the light when the ambient light is irradiated on the display panel and refracted into the interior of the display panel, wherein the light corresponding to α is incident along the side of the color block closest to the ambient light hole close to the ambient light hole to the side of the second photosensitive layer close to the nearest color block; the light corresponding to β is incident along the side of the color block closest to the ambient light hole away from the ambient light hole to the side of the second photosensitive layer away from the nearest color block.

2. The display panel according to claim 1, wherein: The light-emitting device (22) comprises an anode (221), a light-emitting layer (222) and a cathode (223), wherein the anode (221) and the cathode (223) are located on opposite sides of the light-emitting layer (222), and the anode (221) is located on a side of the light-emitting layer (222) close to the array substrate (10), and the anode (221) and the second electrode (233) are in the same layer.

3. The display panel according to claim 1, wherein: The light emitting device (22) is opposite to the color block (51), the light shielding structure (52) has a fingerprint hole (52a), the first photosensitive layer (231) is opposite to the fingerprint hole (52a), and the second photosensitive layer (241) is opposite to the ambient light hole (52b).

4. The display panel according to claim 3, wherein: The ratio of the width (d) of the ambient light hole (52b) to the width (D) of the second photosensitive layer (241) is 0.5 to 1.5, the width direction of the ambient light hole (52b) and the width direction of the second photosensitive layer (241) are both parallel to the bearing surface of the array substrate (10) and are located in a reference plane, which is a plane perpendicular to the bearing surface of the array substrate (10) and passes through the center of the ambient light hole (52b).

5. The display panel according to claim 3, wherein: The functional device layer (20) further includes a color temperature sensor, and the color temperature sensor includes a third photosensor (25), a fourth photosensor (26), and a fifth photosensor (27); The third photosensor (25), the fourth photosensor (26), and the fifth photosensor (27) are respectively opposite to color blocks (51) of different colors.

6. The display panel according to claim 5, wherein: The third photosensitive device (25) includes a third photosensitive layer (251), a fifth electrode (252) and a sixth electrode (253); The fourth photosensitive device (26) includes a fourth photosensitive layer (261), a seventh electrode (262) and an eighth electrode (263); The fifth photosensitive device (27) includes a fifth photosensitive layer (271), a ninth electrode (272) and a tenth electrode (273); The third photosensitive layer (251), the fourth photosensitive layer (261), and the fifth photosensitive layer (271) are all on the same layer as the first photosensitive layer (231); The fifth electrode (252), the seventh electrode (262), and the ninth electrode (272) are all in the same layer as the first electrode (232); The sixth electrode (253), the eighth electrode (263) and the tenth electrode (273) are all in the same layer as the second electrode (233).

7. The display panel according to claim 5, wherein: The light-emitting device (22) and the first photosensitive device (23) are both located in the display area (101); The color temperature sensor is located in the display area (101) or the peripheral area (102).

8. The display panel according to claim 6, wherein: The functional device layer (20) further comprises a transparent protective layer (cover), and the transparent protective layer (cover) is located on surfaces of the first photosensitive layer (231), the second photosensitive layer (241), the third photosensitive layer (251), the fourth photosensitive layer (261), and the fifth photosensitive layer (271) away from the array substrate (10); The transparent protective layer (cover) has a plurality of via holes (291), and the second electrode (233), the fourth electrode (243), the sixth electrode (253), the eighth electrode (263) and the tenth electrode (273) are respectively connected to the first photosensitive layer (231), the second photosensitive layer (241), the third photosensitive layer (251), the fourth photosensitive layer (261) and the fifth photosensitive layer (271) through the via holes (291).

9. A method for manufacturing a display panel, characterized in that: The method comprises: Providing an array substrate (10), the array substrate (10) comprising a display area (101) and a peripheral area (102) surrounding the display area (101); forming a first electrode layer on the carrying surface of the array substrate (10), wherein the first electrode layer comprises a first electrode (232) and a third electrode (242); forming a photosensitive layer on the first electrode layer, wherein the photosensitive layer comprises a first photosensitive layer (231) located on the first electrode (232) and a second photosensitive layer (241) located on the third electrode (242); forming a second electrode layer on the photosensitive layer, the second electrode layer comprising a second electrode (233) located on the first photosensitive layer (231) and a fourth electrode (243) located on the second photosensitive layer (241), so as to form a first photosensitive device (23) and a second photosensitive device (24) on the supporting surface of the array substrate (10), wherein the second photosensitive device (24) is located in the peripheral area (102); forming a plurality of light-emitting devices (22) to form a functional device layer (20) on the carrying surface of the array substrate (10); A color filter layer (50) is formed, the color filter layer (50) being located on a side of the functional device layer (20) away from the array substrate (10), the color filter layer (50) comprising a plurality of color blocks (51) distributed in an array and a light shielding structure (52) located between the plurality of color blocks (51), the light shielding structure (52) having an ambient light hole (52b), and the ambient light hole (52b) and the color block (51) closest to the ambient light hole (52b) satisfying the following relationship: When the width (d) of the ambient light hole (52b) is greater than the width (D) of the second photosensitive layer (241), tanα=(Pd) / h, tanβ=(P+d) / h; When the width (d) of the ambient light hole (52b) is not greater than the width (D) of the second photosensitive layer (241), tanα=(PD) / h, tanβ=(P+D) / h; Wherein, P is the distance between the center of the ambient light hole (52b) and the center of the nearest color block (51) in a direction parallel to the bearing surface of the array substrate (10), h is the distance between the color block (51) and the second photosensitive layer (241) in a direction perpendicular to the bearing surface of the array substrate (10), 0<α<β≤42°, α and β are respectively the refraction angles of the light when the ambient light is irradiated on the display panel and refracted into the interior of the display panel, wherein the light corresponding to α is incident along the side of the color block closest to the ambient light hole close to the ambient light hole to the side of the second photosensitive layer close to the nearest color block; the light corresponding to β is incident along the side of the color block closest to the ambient light hole away from the ambient light hole to the side of the second photosensitive layer away from the nearest color block.

10. A method for detecting ambient light intensity, the method being applied to the display panel according to any one of claims 1 to 8, characterized in that: The method comprises: Determining the first ambient light intensity based on a relationship between a signal amount of an electrical signal generated by the second photosensor (24) within a first integration time period and the ambient light intensity, and an actual signal amount of the electrical signal generated by the second photosensor (24) within the first integration time period; determining a second integration time period according to the first ambient light intensity, wherein the second integration time period is greater than the first integration time period; The second ambient light intensity is determined based on the relationship between the signal amount of the electrical signal generated by the second photosensor (24) within the second integration time and the ambient light intensity, and the actual signal amount of the electrical signal generated by the second photosensor (24) within the second integration time.

11. The ambient light intensity detection method according to claim 10, wherein: The determining the second integration time according to the first ambient light intensity includes: According to the correspondence between the ambient light intensity intervals and the integration time periods, the integration time period corresponding to the interval containing the first ambient light intensity is determined as the second integration time period.

12. An ambient light intensity detection device, used for the display panel according to any one of claims 1 to 8, characterized in that: include: a light intensity determination module for determining the first ambient light intensity based on a relationship between a signal amount of an electrical signal generated by the second photosensor (24) within a first integration time period and the ambient light intensity, and an actual signal amount of the electrical signal generated by the second photosensor (24) within the first integration time period; a duration determination module, configured to determine a second integration duration according to the first ambient light intensity, wherein the second integration duration is greater than the first integration duration; The light intensity determination module is further used to determine the second ambient light intensity based on the relationship between the signal amount of the electrical signal generated by the second photosensor (24) within the second integration time and the ambient light intensity, and the actual signal amount of the electrical signal generated by the second photosensor (24) within the second integration time.

13. The ambient light intensity detection device according to claim 12, characterized in that: The duration determination module is configured to determine the integration duration corresponding to the interval containing the first ambient light intensity as the second integration duration based on a correspondence between the ambient light intensity interval and the integration duration.

14. A display device, characterized in that: The display device includes the display panel according to any one of claims 1 to 8.

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