Light emitting device and display device

Abstract

The embodiment of the present invention provides a light-emitting device and a display device. The light-emitting device includes a dimming zone and a partition circuit, and the partition circuit corresponds to the dimming zone; the partition circuit includes a light-emitting module and a photosensitive module, and the light-emitting module and the photosensitive module are located in the dimming zone; the partition circuit includes a first state, and the light-emitting module and the photosensitive module are connected in series in the first state; the light-emitting device also includes a power module and a brightness adjustment module; the power module is used to provide a power supply voltage to the partition circuit, and the power module provides a first voltage value to the partition circuit in the first state; the brightness adjustment module is used to monitor the real-time equivalent resistance of the photosensitive module when the power module provides the first voltage value, and send an adjustment instruction to the power module; the power module responds to the adjustment instruction to provide a second voltage value to the partition circuit in the first state, and the second voltage value is different from the first voltage value. The present invention can adjust the brightness of the dimming zone so that the brightness of the dimming zone is consistent with the expected brightness, thereby improving the brightness uniformity.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a light-emitting device and a display device. Background Art

[0002] Mini LED (Mini light-emitting diode) is a sub-millimeter light-emitting diode, which has the characteristics of high brightness, high contrast, high color saturation, low power consumption, fast response speed, and long life. It is widely used in the display field. Mini LED can be used as a light source in the display field, and the Mini LED array is arranged to make a light-emitting panel. The arrayed Mini LED in the light-emitting panel can be divided into zones, and the light emission of each zone can be independently controlled. At present, the light-emitting panel has the problem of poor brightness uniformity in the zones. Summary of the invention

[0003] Embodiments of the present invention provide a light emitting device and a display device to solve the technical problem of poor uniformity of brightness in different zones in the prior art.

[0004] In a first aspect, an embodiment of the present invention provides a light-emitting device, the light-emitting device includes a dimming zone and a partition circuit, the partition circuit corresponds to the dimming zone; the partition circuit includes a light-emitting module and a photosensitive module, the light-emitting module and the photosensitive module are located in the dimming zone; the partition circuit includes a first state, in which the light-emitting module and the photosensitive module are connected in series;

[0005] The light emitting device also includes a power supply module and a brightness adjustment module;

[0006] The power supply module is used to provide a power supply voltage to the partition circuit, wherein the power supply module provides a first voltage value to the partition circuit in a first state;

[0007] The brightness adjustment module is used to monitor the real-time equivalent resistance of the photosensitive module when the power module provides the first voltage value, and send an adjustment instruction to the power module;

[0008] The power module provides a second voltage value to the partition circuit in the first state in response to the adjustment instruction, the second voltage value being different from the first voltage value.

[0009] In a second aspect, based on the same inventive concept, an embodiment of the present invention further provides a display device, including the light-emitting device provided by any embodiment of the present invention.

[0010] The light-emitting device and display device provided by the embodiment of the present invention have the following beneficial effects: a light-emitting module and a photosensitive module are arranged in the dimming zone, and the photosensitive module and the light-emitting module are connected in series when the partition circuit is in the first state. The power module provides a first voltage value to the partition circuit in the first state, and the light-emitting module emits light under the control of the first voltage value. After the light-emitting module emits light, the dimming zone has a certain brightness, and the equivalent resistance of the photosensitive module changes after sensing the brightness of the dimming zone, and the real-time equivalent resistance of the photosensitive module can characterize the brightness of the dimming zone. The brightness adjustment module is used to monitor the real-time equivalent resistance of the photosensitive module, and an adjustment instruction is sent to the power module according to the real-time equivalent resistance. The power module makes feedback according to the adjustment instruction to provide a second voltage value to the partition circuit in the first state, and uses the second voltage value different from the first voltage value to control the light-emitting module to emit light. The embodiment of the present invention uses the influence of the light-emitting module on the equivalent resistance of the photosensitive module after the light-emitting module emits light, and adjusts the voltage value provided to the partition circuit by monitoring the real-time equivalent resistance of the photosensitive module, so as to adjust the brightness of the dimming zone, so that the brightness of the dimming zone is consistent with the expected brightness, thereby improving the brightness uniformity of each partition. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative labor.

[0012] Figure 1 A schematic diagram of a light emitting device provided by an embodiment of the present invention;

[0013] Figure 2 A schematic diagram of a circuit structure in a light emitting device provided in an embodiment of the present invention;

[0014] Figure 3 A brightness adjustment flow chart of the dimming zone in an embodiment of the present invention;

[0015] Figure 4 A schematic diagram of another circuit structure in a light emitting device provided in an embodiment of the present invention;

[0016] Figure 5 This is a flow chart of monitoring and obtaining real-time equivalent resistance in an embodiment of the present invention;

[0017] Figure 6 A schematic diagram of another circuit structure in a light emitting device provided in an embodiment of the present invention;

[0018] Figure 7 A schematic diagram of another circuit structure in a light emitting device provided in an embodiment of the present invention;

[0019] Figure 8 This is another flow chart of monitoring and obtaining real-time equivalent resistance in an embodiment of the present invention;

[0020] Fig. 9 Another schematic diagram of a partition circuit provided by an embodiment of the present invention;

[0021] Fig.10 A schematic diagram of another light emitting device provided by an embodiment of the present invention;

[0022] Fig.11 for Fig.10 Circuit diagram for the middle dimming zone;

[0023] Fig.12 A schematic diagram of another circuit at a dimming zone provided by an embodiment of the present invention;

[0024] Fig.13 A schematic diagram of another light emitting device provided by an embodiment of the present invention;

[0025] Fig.14 A schematic diagram of another light emitting device provided by an embodiment of the present invention;

[0026] Fig.15 A schematic diagram of another light emitting device provided by an embodiment of the present invention;

[0027] Fig.16 A schematic diagram of another light emitting device provided by an embodiment of the present invention;

[0028] Fig.17 A schematic diagram of another light emitting device provided by an embodiment of the present invention;

[0029] Fig.18 A schematic diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0032] The signal input terminal of a traditional light-emitting panel is usually set at one end of the substrate, and the distance from each partition on the light-emitting panel to the signal input terminal is different. Each partition is connected to the signal input terminal through a metal line, and lines of different lengths have different resistances. Due to the voltage division of the line resistance, the actual working voltage of each partition is different, which leads to differences in the brightness of each partition, affecting the display effect. In addition, the light superposition effect of the light-emitting devices at the peripheral position of the light-emitting area of ​​the light-emitting panel is not as good as that in the middle area. As a result, even if the same voltage is provided to the actual peripheral position as the middle area, the brightness effect is not as good as that of the middle area. The brightness of the partitions at the peripheral position will be dim, affecting the display effect.

[0033] In order to solve the problems existing in the prior art, an embodiment of the present invention provides a light-emitting device, in which a photosensitive module is arranged in a dimming zone, and the equivalent resistance of the photosensitive module is used to characterize the brightness of the dimming zone. The real-time equivalent resistance of the photosensitive module is detected to adjust the power supply voltage for controlling the brightness of the dimming zone, thereby adjusting the brightness of the dimming zone to ensure that the brightness of the dimming zone is consistent with the expected brightness, thereby improving the brightness uniformity of each partition.

[0034] Figure 1 A schematic diagram of a light emitting device provided by an embodiment of the present invention, Figure 2 A schematic diagram of a circuit structure in a light-emitting device provided in an embodiment of the present invention.

[0035] like Figure 1 As shown, the light-emitting device 100 includes a plurality of partitions 10, which are schematically divided by horizontal and vertical intersecting dotted lines. Each partition 10 includes at least one light-emitting device 20, and the light-emitting device 20 is a light-emitting diode, such as a Mini LED. When the partition 10 includes two or more light-emitting devices 20, the light-emitting devices 20 in the partition 10 are connected in parallel or in series. Figure 1 Only four light emitting devices 20 are included in the subarea 10 for illustration.

[0036] In the embodiment of the present invention, the subarea 10 includes a dimming area 11, which is a brightness-adjustable area. In some embodiments, all subareas 10 in the light emitting device 100 are dimming areas 11. In other embodiments, only some of all subareas 10 are dimming areas 11. Figure 1 It is assumed that all the subareas 10 are dimming areas 11 for illustration.

[0037] The light-emitting device 100 further includes a partition circuit 30, and the partition circuit 30 corresponds to the dimming zone 11; wherein, the partition circuit 30 corresponds to the dimming zone 11 means that the partition circuit 30 can be used to adjust the brightness of the light-emitting device 20 in the dimming zone 11. The partition circuit 30 includes a light-emitting module 31 and a photosensitive module 32, and the light-emitting module 31 and the photosensitive module 32 are located in the dimming zone 11. The light-emitting device 20 in the dimming zone 11 belongs to the light-emitting module 31, that is, the number of light-emitting devices 20 included in the light-emitting module 31 is equal to the number of light-emitting devices 20 included in the dimming zone 11 where it is located. It can be understood that the dimming zone 11 is a division of the structure in the light-emitting device from the perspective of the plane area, and the partition circuit 30 is a division of the structure in the light-emitting device from the perspective of the circuit line. As a circuit line, the partition circuit 30 not only includes the light-emitting module 31 and the photosensitive module 32, but also includes at least some circuit routing, such as routing for connecting the light-emitting module 31 and the photosensitive module 32 in series, and routing connecting the photosensitive module 32 and the light-emitting module 31 to the signal input terminal. Figure 1 Circuit routing in the partition circuit 30 is not shown.

[0038] The equivalent resistance of the photosensitive module 32 changes with the intensity of the light it receives, and the photosensitive module 32 includes at least one photosensitive device. The photosensitive module 32 can characterize the luminous brightness of the dimming zone 11 in which it is located. For example, when the light-emitting module 31 in the dimming zone 11 does not emit light, the resistance of the photosensitive module 32 does not change, that is, the initial resistance. The initial resistance of the photosensitive module 32 is the resistance after the photosensitive module 32 is manufactured and formed. When the light-emitting module 31 in the dimming zone 11 emits light, the equivalent resistance of the photosensitive module 32 decreases after being illuminated. In some embodiments, the equivalent resistance of the photosensitive module 32 is inversely proportional to the brightness. Optionally, the equivalent resistance of the photosensitive module 32 decreases as the intensity of the light irradiation increases, and the photosensitive module 32 includes a thin film transistor or a photoresistor.

[0039] The light emitting device 100 further includes a power supply module 40 and a brightness adjustment module 50. Figure 1 As shown, the light emitting device includes a flexible circuit board 60, which is bound to one end of the substrate. A driving chip 61 is fixed on the flexible circuit board 60, and the power module 40 and the brightness adjustment module 50 are integrated in the driving chip 61. The power module 40 is used to provide a power supply voltage to the partition circuit 30.

[0040] Figure 2 The first state of the partition circuit 30 is shown in FIG. Figure 2 As shown, the partition circuit 30 includes a first state, in which the light emitting module 31 and the light sensing module 32 are connected in series. The power module 40 provides power to the light emitting module 31 and the light sensing module 32 in the partition circuit 30.

[0041] The power module 40 is used to provide a first voltage value to the partition circuit 30 in the first state. Optionally, the power module 40 provides a positive power supply voltage and a negative power supply voltage to the partition circuit 30 in the first state, and the voltage difference between the positive power supply voltage and the negative power supply voltage is the first voltage value. The first voltage value can be a preset voltage value required for the dimming zone 11 preset by the system to reach the expected brightness. In other words, when the first voltage value is provided to the partition circuit 30 in the first state, the dimming zone 11 can theoretically reach the expected brightness. In fact, due to the position difference of the dimming zone 11 in the surface of the light-emitting device and the voltage division effect of the circuit routing in the partition circuit 30, when the first voltage value is provided to the partition circuit 30 in the first state, the actual brightness of the dimming zone 11 may be greater than the expected brightness, or may be less than the expected brightness.

[0042] The brightness adjustment module 50 is used to monitor the real-time equivalent resistance of the photosensitive module 32 when the power module 40 provides the first voltage value, and send an adjustment instruction to the power module 40. Figure 2 As shown, the brightness adjustment module 50 includes a sampling module 51, and the sampling module 51 is connected in series with the partition circuit 30. The sampling module 51 is used to monitor the real-time equivalent resistance of the photosensitive module 32. When the partition circuit 30 is in the first state, the sampling module 51, the light emitting module 31, and the photosensitive module 32 are connected in series.

[0043] The power module 40 provides a second voltage value to the partition circuit 30 in the first state in response to the adjustment instruction, the second voltage value being different from the first voltage value.

[0044] In the light-emitting device provided by the embodiment of the present invention, a light-emitting module 31 and a photosensitive module 32 are arranged in the dimming zone 11. When the partition circuit 30 is in the first state, the photosensitive module 32 and the light-emitting module 31 are connected in series. The power module 40 provides a first voltage value to the partition circuit 30 in the first state, and the light-emitting module 31 emits light under the control of the first voltage value. After the light-emitting module 31 emits light, the dimming zone 11 has a certain brightness, and the equivalent resistance of the photosensitive module 32 changes after sensing the brightness of the dimming zone 11. The real-time equivalent resistance of the photosensitive module 32 can represent the brightness of the dimming zone 11. The brightness adjustment module 50 is used to monitor the real-time equivalent resistance of the photosensitive module 32, and an adjustment instruction is sent to the power module 40 according to the real-time equivalent resistance. The power module 40 makes feedback according to the adjustment instruction to provide a second voltage value to the partition circuit 30 in the first state, and uses the second voltage value different from the first voltage value to control the light-emitting module 31 to emit light. The embodiment of the present invention utilizes the influence of the light-emitting module 31 on the equivalent resistance of the photosensitive module 32 after emitting light. By monitoring the real-time equivalent resistance of the photosensitive module 32, the voltage value provided to the partition circuit 30 is adjusted, so that the brightness of the dimming zone 11 can be adjusted, so that the brightness of the dimming zone 11 is consistent with the expected brightness, thereby improving the brightness uniformity of each partition.

[0045] In some embodiments, the light emitting device 100 includes a substrate, and the light emitting module 31 and the light sensing module 32 are located on the same side of the substrate; Figure 1 The top view of the light emitting device 100 is shown. It can be understood that the top view direction is parallel to the direction perpendicular to the plane where the substrate is located. In the embodiment of the present invention, the light emitting module 31 and the photosensitive module 32 do not overlap in the direction perpendicular to the plane where the substrate is located. Such a setting can prevent the light emitting module 31 from blocking the photosensitive module 32, and can improve the photosensitive module 32 to accurately sense the brightness change of the dimming zone 11 where it is located, thereby ensuring the accuracy of the brightness adjustment of the dimming zone 11.

[0046] In some embodiments, Figure 1 As shown, the photosensitive module 32 is located at the geometric center of the dimming zone 11. Such a configuration can ensure that the photosensitive module 32 accurately senses the brightness change of the dimming zone 11 where it is located, thereby ensuring the accuracy of the brightness adjustment of the dimming zone 11.

[0047] In some embodiments, Figure 3 1 is a brightness adjustment flow chart of the dimming zone in the embodiment of the present invention. In practice, the brightness of the dimming zone 11 may be greater than the expected brightness, or less than the expected brightness. The embodiment of the present invention can adjust the brightness of the dimming zone 11 accordingly if the brightness is too large or too small. Figure 3 As shown:

[0048] First, the power module 40 provides a first voltage value to the partition circuit 30 in the first state. Under the control of the first voltage value, the light-emitting module 31 in the dimming zone 11 emits light, and the equivalent resistance of the photosensitive module 32 is inversely proportional to the brightness of the dimming zone 11 in which it is located. Then, the equivalent resistance of the photosensitive module 32 changes after being exposed to light.

[0049] Then the brightness adjustment module 50 monitors the real-time equivalent resistance of the photosensitive module 32. The brightness adjustment module 50 includes a comparison module. After monitoring the real-time equivalent resistance of the photosensitive module 32, the comparison module is used to compare the real-time equivalent resistance with the standard resistance. The standard resistance corresponds to the expected brightness of the dimming zone 11. The standard resistance can be a preset resistance value in the system, which is obtained through multiple tests before leaving the factory. When the real-time equivalent resistance is equal to the standard resistance, it means that the actual brightness of the dimming zone 11 is consistent with the expected brightness.

[0050] Among them, when the real-time equivalent resistance is greater than the standard resistance, it means that the actual brightness of the dimming zone 11 does not reach the expected brightness. At this time, the brightness adjustment module 50 sends a first adjustment instruction to the power module 40; the power module 40 responds to the first adjustment instruction to provide a second voltage value to the partition circuit 30 in the first state, and the second voltage value is greater than the first voltage value. That is, when the real-time equivalent resistance is greater than the standard resistance, the voltage value provided to the partition circuit 30 is increased. After providing a larger voltage value to the partition circuit 30 in the first state, the brightness of the photosensitive module 32 will increase accordingly, so as to adjust the brightness of the dimming zone 11, so that the actual brightness of the dimming zone 11 is close to the expected brightness.

[0051] When the real-time equivalent resistance is less than the standard resistance, it means that the actual brightness of the dimming zone 11 exceeds the expected brightness, that is, the actual brightness of the dimming zone 11 is too high. At this time, the brightness adjustment module 50 sends a second adjustment instruction to the power module 40; the power module 40 responds to the second adjustment instruction to provide a second voltage value to the partition circuit 30 in the first state, and the second voltage value is less than the first voltage value. That is, when the real-time equivalent resistance is less than the standard resistance, the voltage value provided to the partition circuit 30 is reduced. After providing a smaller voltage value to the partition circuit 30 in the first state, the brightness of the photosensitive module 32 will be reduced accordingly, so as to adjust the brightness of the dimming zone 11 so that the actual brightness of the dimming zone 11 is close to the expected brightness.

[0052] In some embodiments, the equivalent resistance of the photosensitive module 32 is proportional to the brightness of the dimming zone 11 in which it is located, that is, the greater the brightness of the dimming zone 11, the greater the equivalent resistance of the photosensitive module 32. When it is detected that the real-time equivalent resistance is greater than the standard resistance, it means that the actual brightness of the dimming zone 11 is greater than the expected brightness, and the power module 40 responds to the adjustment instruction to reduce the voltage value provided to the partition circuit 30 in the first state so that the brightness of the dimming zone 11 is reduced and close to the expected brightness. When it is detected that the real-time equivalent resistance is less than the standard resistance, it means that the actual brightness of the dimming zone 11 is less than the expected brightness, and the power module 40 responds to the adjustment instruction to increase the voltage value provided to the partition circuit 30 in the first state so that the brightness of the dimming zone 11 is increased and close to the expected brightness.

[0053] In some embodiments, Figure 4 This is another schematic diagram of a circuit structure in a light emitting device provided in an embodiment of the present invention. Figure 5 This is a flow chart of a method for monitoring and obtaining real-time equivalent resistance in an embodiment of the present invention. Figure 4 As shown, the brightness adjustment module 50 includes a sampling module 51 and an operation module 52; wherein, the sampling module 51 is connected in series in the partition circuit 30, the sampling module 51 is electrically connected to the operation module 52, the sampling module 51 is used to collect the current value in the partition circuit 30, and send the current value to the operation module 52; the operation module 52 is used to calculate the real-time equivalent resistance according to the current value.

[0054] Combination Figure 5 From the perspective of FIG. 1 , the power module 40 provides a first voltage value to the partition circuit 30 in the first state. Under the control of the first voltage value, the light emitting module 31 emits light, the partition circuit 30 forms a loop, and current exists in the partition circuit 30. Then, the sampling module 51 is used to collect the current value of the partition circuit 30 in the first state and record it as the first current value, and the first current value is sent to the calculation module 52.

[0055] The calculation module 52 calculates the total resistance of the partition circuit 30 in the first state according to the first current value and the first voltage value, and records it as the first total resistance. The calculation module 52 determines the real-time equivalent resistance according to the first total resistance, the resistance of the light-emitting module 31, and the resistance of the wiring in the partition circuit 30. Among them, the first voltage value is recorded as U1, and the first current value is recorded as I1. According to Ohm's law, the first total resistance R0=U1 / I1 can be calculated. In the partition circuit 30 in the first state, the first total resistance R0=the resistance R of the light-emitting module 31 31+ the resistance Rz of the wiring in the partition circuit 30 + the real-time equivalent resistance Rs of the photosensitive module 32. Here, only for the purpose of illustrating the calculation method of the real-time equivalent resistance, the resistance of the sampling module 51 is ignored in the above calculation formula of the first total resistance R0. The sampling module 51 is generally a resistor with a very small resistance value, and its voltage dividing effect is very small, so it can be ignored in the calculation. If the resistance of the sampling module 51 is added when calculating the first total resistance R0, it can also be realized. The first total resistance R0 = the resistance R of the light-emitting module 31 31 + the resistance Rz of the wiring in the partition circuit 30 + the real-time equivalent resistance Rs of the photosensitive module 32 + the resistance R of the sampling module 51 51 , because after the manufacturing is completed, the resistance R of the sampling module 51 51 It can also be tested and obtained as a known value, so the real-time equivalent resistance Rs of the photosensitive module 32 can also be calculated in the end.

[0056] In the embodiment of the present invention, the brightness adjustment module 50 includes a sampling module 51 and a calculation module 52. When the partition circuit 30 is in the first state, the power module 40 provides a first voltage value. At this time, the partition circuit 30 forms a loop, and the current value in the loop is the first current value. The sampling module 51 can collect the first current value of the partition circuit 30 in the first state, and send the first current value to the calculation module 52. The calculation module 52 uses Ohm's law to calculate the first total resistance in the partition circuit 30 according to the first current value and the first voltage value. The main voltage divider elements in the partition circuit 30 in the first state include the light-emitting module 31, the photosensitive module 32, and the circuit routing in the partition circuit 30, thereby further determining the real-time equivalent resistance of the photosensitive module 32.

[0057] In some embodiments, the brightness adjustment module 50 further includes a resistance data table, in which the position information of the dimming zone 11 corresponds to the resistance data one by one, and the resistance data at least includes the resistance R of the light emitting module 31. 31 and the resistance Rz of the wiring in the partition circuit 30; the calculation module 52 is used to retrieve the resistance R of the light-emitting module 31 in the resistance data table according to the position information of the dimming zone 11 31and the resistance Rz of the wiring in the partition circuit 30. Among them, the position information of the dimming zone 11 can be, for example, the row and column position of the dimming zone 11. When the light-emitting device includes multiple partitions 10 of a row and b columns (a and b are both positive integers), for example, the partition 10 of the 3rd row and 4th column is the dimming zone 11, then the position signal of the dimming zone 11 can be recorded as 11(3,4). When the position of the dimming zone 11 in the partition array is determined, the position of the power module 40 in the light-emitting device is also determined, then the distance between the dimming zone 11 and the power module 40 is determined, and the resistance of the wiring in the partition circuit 30 where the light-emitting module 31 in the dimming zone 11 is located can also be tested or calculated based on empirical values, so that the resistance Rz of the wiring in the partition circuit 30 is preset in the resistance data table. In addition, when the position of the dimming zone 11 in the partition array is determined, the number of light-emitting devices in the light-emitting module 31 in the dimming zone 11 and the series-parallel connection mode are also determined, and the resistance of the light-emitting module 31 can also be detected in advance, so that the resistance Rz of the light-emitting module 31 is preset in the resistance data table. 31 Preset in the resistance data table. In this embodiment, the resistance R of the light emitting module 31 31 The resistance Rz of the wiring in the partition circuit 30 is preset in the system in advance. The operation module 52 can retrieve relevant data at any time when calculating the real-time equivalent resistance of the photosensitive module 32, which can reduce the data processing steps of the operation module 52, simplify the operation method, and improve the operation speed, thereby improving the adjustment speed of the brightness adjustment of the dimming zone 11.

[0058] In some embodiments, Figure 6 A schematic diagram of another circuit structure in a light emitting device provided in an embodiment of the present invention. Figure 7 A schematic diagram of another circuit structure in a light emitting device provided in an embodiment of the present invention. Figure 6 The second state of the partition circuit 30 is shown. Figure 7 Schematically shows the third state of the partition circuit 30. Figure 6 As shown, the partition circuit 30 also includes a second state. In the second state, only the light-emitting module 31 and the light-sensing module 32 are connected in series in the partition circuit 30. The power module 40 serves as the power supply in the circuit loop formed by the partition circuit 30 in the second state. The sampling module 51 is connected in series with the light-sensing module 32 in the partition circuit 30 in the second state. The sampling module 51 is used to collect the current in the partition circuit 30 in the second state. Figure 7 As shown, the partition circuit 30 also includes a third state. In the third state, only the light-emitting module 31 among the light-emitting module 31 and the photosensitive module 32 is connected in series in the partition circuit 30; wherein the power supply module 40 serves as the power supply in the circuit loop formed by the partition circuit 30 in the third state, and the sampling module 51 is connected in series with the light-emitting module 31 in the partition circuit 30 in the third state, and the sampling module 51 is used to collect the current in the partition circuit 30 in the third state.

[0059] The sampling module 51 collects the current value of the partition circuit 30 in the second state as the second current value I2, and collects the current value of the partition circuit 30 in the third state as the third current value I3; the operation module 52 is also used to determine the resistance of the light-emitting module 31 and the resistance of the wiring in the partition circuit 30 according to the second current value I2 and the third current value I3. In this embodiment, the partition circuit 30 includes three states, namely the first state, the second state and the third state. The devices connected in series in the partition circuit 30 are different in the three states, but since the position of the dimming zone 11 in the light-emitting device is fixed, the distance between the dimming zone 11 and the power module 40 is fixed, and it can be considered that the resistance Rz of the circuit wiring in the partition circuit 30 in the three states is basically the same. Among them, in the second state, the main voltage-dividing elements in the partition circuit 30 include the light-sensing module 32 and the circuit routing in the partition circuit 30. Since the light-emitting module 31 is not connected in series in the partition circuit 30, the light-emitting module 31 in the dimming zone 11 does not emit light, and the resistance of the light-sensing module 32 is its initial resistance. Then, the second current value I2 is detected, and then the resistance Rz of the circuit routing in the partition circuit 30 can be calculated according to Ohm's law. That is, the resistance Rz of the circuit routing in the partition circuit 30 can be obtained by using the second state of the partition circuit 30. In the third state, the main voltage-dividing elements in the partition circuit 30 include the light-emitting module 31 and the circuit routing in the partition circuit 30. After monitoring the second state, the resistance Rz of the circuit routing in the partition circuit 30 can be obtained. Then, the third current value I3 is detected by using the third state, and then the resistance Rz of the light-emitting module 31 can be calculated according to Ohm's law. 31 .

[0060] In this embodiment, the partition circuit 30 includes three states. The second state of the partition circuit 30 can be used to determine the resistance Rz of the circuit wiring in the partition circuit 30, and the third state of the partition circuit 30 can be used to determine the resistance Rz of the light emitting module 31. 31 , the real-time equivalent resistance of the photosensitive module 32 can be determined by using the first state of the partition circuit 30. Then, an adjustment instruction is generated according to the comparison result between the real-time equivalent resistance and the standard resistance, and the power module 40 makes feedback according to the adjustment instruction to adjust the voltage value provided to the partition circuit 30 to adjust the brightness of the dimming zone 11. Considering the influence of the use time and use environment of the light-emitting device, the resistance Rz of the circuit wiring in the partition circuit 30 and the resistance Rz of the light-emitting module 31 are 31 There may be some fluctuations. In the embodiment of the present invention, during the brightness adjustment feedback process of the dimming zone 11, the resistance Rz of the circuit wiring in the partition circuit 30 and the resistance R 31 The detection can ensure the accuracy of the real-time equivalent resistance of the photosensitive module 32 obtained in the end, thereby improving the accuracy of the brightness adjustment of the dimming zone 11.

[0061] In some embodiments, Figure 8 This is another flow chart for monitoring and obtaining real-time equivalent resistance in an embodiment of the present invention. Figure 8 As shown in Figure 1, the process of obtaining real-time equivalent resistance includes three stages.

[0062] In the first stage: the power module 40 provides a third voltage value to the partition circuit 30 in the second state; the sampling module 51 detects the current value in the partition circuit 30 when the power module 40 provides the third voltage value and records it as the second current value; the calculation module 52 calculates the total resistance of the partition circuit 30 in the second state according to the second current value and the third voltage value, and records it as the second total resistance, and determines the resistance Rz of the routing in the partition circuit 30 according to the second total resistance and the initial resistance of the photosensitive module 32.

[0063] In the second stage: the power module 40 provides a fourth voltage value to the partition circuit 30 in the third state; the sampling module 51 detects the current value in the partition circuit 30 when the power module 40 provides the fourth voltage value and records it as the third current value; the calculation module 52 calculates the total resistance of the partition circuit 30 in the third state according to the third current value and the fourth voltage value, records it as the third total resistance, and determines the resistance Rz of the light-emitting module 31 according to the third total resistance and the resistance Rz of the wiring in the partition circuit 30. 31 .

[0064] In the third stage: the power module 40 provides a first voltage value to the partition circuit 30 in the first state; the sampling module 51 detects the current value in the partition circuit 30 when the power module 40 provides the first voltage value and records it as the first current value; the operation module 52 calculates the total resistance of the partition circuit 30 in the first state according to the first current value and the first voltage value, and records it as the first total resistance, and calculates the total resistance according to the first total resistance, the resistance Rz of the wiring in the partition circuit 30, and the resistance Rz of the light emitting module 31. 31 The real-time equivalent resistance of the photosensitive module 32 is determined.

[0065] In the embodiment of the present invention, the partition circuit 30 forms a current loop in three stages respectively, and the resistance value in the loop can be determined by detecting the current value in the current loop using Ohm's law. In the first stage, the resistance Rz of the wiring in the partition circuit 30 is determined by using the second state of the partition circuit 30, and the resistance Rz of the light emitting module 31 is determined by using the third state of the partition circuit 30 in the second stage. 31 The resistance Rz of the wiring in the partition circuit 30 and the resistance R of the light emitting module 31 31 After the determination, the third stage uses the first state of the partition circuit 30 to determine the real-time equivalent resistance of the photosensitive module 32 .

[0066] In addition, the embodiment of the present invention does not limit the magnitude relationship between the third voltage value and the fourth voltage value, and the two may be equal or unequal.

[0067] In some embodiments, Fig. 9 Another partition circuit diagram provided by an embodiment of the present invention. Fig. 9 As shown, the light emitting device further includes a circuit control module 66, which is used to control the state of the partition circuit 30 so as to realize that the partition circuit 30 includes a first state, a second state and a third state. The circuit control module 66 is used to realize that the partition circuit 30 has three working states, so that the resistance Rz of the wiring in the partition circuit 30 and the resistance Rz of the light emitting module 31 are determined by using the second state and the third state. 31 Then, the first state is used to determine the real-time equivalent resistance of the photosensitive module 32. In the brightness adjustment feedback process of the dimming zone 11, the resistance Rz of the circuit wiring in the partition circuit 30 and the resistance R of the light-emitting module 31 are 31 The detection can ensure the accuracy of the real-time equivalent resistance of the photosensitive module 32 obtained in the end, thereby improving the accuracy of the brightness adjustment of the dimming zone 11.

[0068] In some embodiments, Fig. 9 As shown, the circuit control module 66 includes a first switch T1 and a second switch T2. The first switch T1 is connected in parallel with the light emitting module 31 and is electrically connected to the first node N1 of the partition circuit 30. The second switch T2 is connected in parallel with the light sensing module 32 and is electrically connected to the first node N1. When the first switch T1 and the second switch T2 are both closed, the partition circuit 30 is in the first state. When the first switch T1 is opened and the second switch T2 is closed, the partition circuit 30 is in the second state. When the first switch T1 is closed and the second switch T2 is opened, the partition circuit 30 is in the third state. In this embodiment, two switches are used to make the circuit control module 66 to control the three working states of the partition circuit 30.

[0069] In some embodiments, the first switch T1 and the second switch T2 are both thin film transistors, the control end of the first switch T1 is coupled to the first control line S1, and the control end of the second switch T2 is coupled to the second control line S2. The first control line S1 controls the first switch T1 to be turned on when providing an enable signal, and the second control line S2 controls the second switch T2 to be turned on when providing an enable signal.

[0070] In some embodiments, the first switch T1 and the second switch T2 are both located in the dimming zone 11, that is, the circuit control module 66 is made in the dimming zone 11. In order to control the working state of the partition circuit 30, when multiple dimming zones 11 are included, it is necessary to respectively set the circuit control module 66 for the partition circuit 30 corresponding to each dimming zone 11, that is, the circuit control module 66 corresponds to the partition circuit 30 one by one. Setting the circuit control module 66 in the dimming zone 11 can make the circuit control module 66 closer to the light-emitting module 31 and the photosensitive module 32, avoid the circuit line of the first switch T1 connected in parallel with the light-emitting module 31 to be too long, and also avoid the circuit line of the second switch T2 connected in parallel with the photosensitive module 32 to be too long, thereby saving the wiring space in the light-emitting device. In addition, setting the first switch T1 and the second switch T2 in the dimming zone 11 can also avoid the circuit control module 66 from occupying other spaces in the light-emitting device.

[0071] In other embodiments, the circuit control module 66 corresponds to the dimming zone 11, that is, the circuit control module 66 is used to control the working state of the partition circuit 30 corresponding to the dimming zone 11. The circuit control module 66 is not located in the dimming zone 11. Optionally, the light-emitting device includes a light-emitting zone and a non-light-emitting zone surrounding the light-emitting zone, and multiple partitions in the light-emitting device are located in the light-emitting zone, that is, the dimming zone 11 is located in the light-emitting zone, and the circuit control module 66 is arranged in the non-light-emitting zone.

[0072] In some embodiments, Fig.10 A schematic diagram of another light emitting device provided by an embodiment of the present invention, Fig.11 for Fig.10 Circuit diagram of the middle dimming area. Fig.10 As shown, the light emitting device 100 includes a plurality of partitions 10, the plurality of partitions 10 are arranged in a first direction into partition rows 10H, and the plurality of partitions 10 are arranged in a second direction y into partition columns 10L, and the first direction x and the second direction y intersect. The plurality of partitions 10 include at least two dimming zones 11, Fig.10 In the figure, only a plurality of subareas 10 are shown as dimming areas 11. Fig.11 As shown, one dimming zone 11 corresponds to one circuit control module 66. The light emitting device 100 further includes a control line group SZ, which includes a first control line S1 and a second control line S2 extending along a first direction x. The first control line S1 and the second control line S2 are respectively connected to a signal input terminal 70 through a pull line. The signal input terminal 70 is located on one side of the partition array in the second direction y. The signal input terminal 70 is also a flexible circuit board ( Fig.10 The signal input terminal 70 is located at the binding area of ​​the light emitting device, and the binding area is bound to the flexible circuit board ( Fig.10The circuit control modules 66 corresponding to at least two dimming zones 11 arranged in the first direction x are coupled to the same control line group SZ. Fig.11 From the above, the control end of the first switch T1 is coupled to the first control line S1, and the control end of the second switch T2 is coupled to the second control line S2. In this embodiment, the circuit control modules 66 corresponding to the dimming zones 11 in the same partition row 10H are coupled to the same control line group SZ, which can reduce the number of control line groups SZ, save the wiring space of the light-emitting device, and also reduce the number of signal ports set in the binding area.

[0073] In some embodiments, Fig.10 As shown, the light emitting device 100 includes a first power line Pv1 and a second power line Pv2 extending along the second direction y, and the light emitting device 100 includes a plurality of partitions 10, each partition 10 is respectively connected to a first power line Pv1 and a second power line Pv2, and the first power line Pv1 and the second power line Pv2 are respectively connected to the power module 40 ( Fig.10 The first power line Pv1 and the second power line Pv2 are coupled. One of the first power line Pv1 and the second power line Pv2 is a positive power line and the other is a negative power line. The power module 40 provides a power supply voltage to the partition 10 through the first power line Pv1 and the second power line Pv2. In this embodiment, each partition 10 is respectively corresponding to the first power line Pv1 and the second power line Pv2, so that the brightness of each partition 10 can be independently controlled.

[0074] Taking dimming zone 11 as an example, the power module 40 provides a first voltage value to the partition circuit 30 in the first state, that is, the voltage difference between the first power line Pv1 and the second power line Pv2 is the first voltage value. When the power supply voltage provided to the partition circuit 30 is adjusted by the brightness adjustment module 50 monitoring the real-time equivalent resistance of the photosensitive module 32, for example, the power supply voltage provided to the partition circuit 30 by the power module 40 is adjusted from the first voltage value to the second voltage value, wherein the voltage signal size on the first power line Pv1 can be adjusted, or the voltage signal size on the second power line Pv2 can be adjusted, or both the voltage signal sizes on the first power line Pv1 and the second power line Pv2 can be adjusted.

[0075] In some embodiments, Fig.12 A schematic diagram of another circuit at a dimming zone provided by an embodiment of the present invention, Fig.13 Schematic diagram of another light emitting device provided by an embodiment of the present invention. Fig.12As shown, the photosensitive module 32 includes a photosensitive transistor 321, the control end of the photosensitive transistor 321 is connected to the third control line S3, and optionally, the third control line S3 is coupled to a constant voltage source, and the third control line S3 provides a constant voltage signal. The first end of the photosensitive transistor 321 is coupled to the light emitting module 31, and the second end of the photosensitive transistor 321 is coupled to the power module 40 ( Fig.12 not shown), Fig.12 As shown in FIG. 3 , the second end of the photosensitive transistor 321 is connected to the second power line Pv2.

[0076] Fig.13 In the figure, each subarea 10 in the light emitting device is still illustrated as a dimming area 11. Fig.13 As shown, the light emitting device 100 further includes a third control line S3 extending along the second direction, and the third control line S3 provides a constant voltage signal. The photosensitive transistors 321 in the dimming zone 11 of the same partition column 10L are coupled to the same third control line S3. In some embodiments, the light emitting device includes a plurality of third control lines S3, and the plurality of third control lines S3 are connected to a constant voltage bus after extending to the signal input terminal 70. The third control line S3 is connected to a constant voltage source in the driver chip through the constant voltage bus, which can reduce the number of pins provided on the driver chip.

[0077] In some other implementations, one of the first power line Pv1 and the second power line Pv2 is a constant voltage signal line, and the first power line Pv1 is taken as an example as a constant voltage signal line. Fig.14 A schematic diagram of another light emitting device provided by an embodiment of the present invention, such as Fig.14 As shown, a first power line Pv1 is coupled to a plurality of partitions 10 in a partition column 10L, that is, a first power line Pv1 provides signals to a plurality of partitions 10 at the same time, and such an arrangement can reduce the number of first power lines Pv1, thereby reducing the number of ports of the power module 40. In other embodiments, the light-emitting device 100 further includes a first auxiliary power line extending along the first direction x, the first auxiliary power line is coupled to the first power line Pv1, and the first power line Pv1 and the first auxiliary power line cross each other to form a grid-like routing, and such an arrangement can provide in-plane uniformity of the signal provided by the first power line Pv1.

[0078] In some embodiments, Fig.15 A schematic diagram of another light emitting device provided by an embodiment of the present invention, such as Fig.15As shown, the light-emitting device 100 includes a plurality of partitions 10, and the plurality of partitions 10 are arranged in an array. The plurality of partitions 10 are arranged in a first direction into partition rows 10H, and the plurality of partitions 10 are arranged in a second direction y into partition columns 10L, and the first direction x and the second direction y intersect. The signal input terminal 70 of the light-emitting device 100 is located on one side of the partition array in the second direction y. In the direction from the signal input terminal 70 to the partition array, the distance between each partition row 10H and the signal input terminal 70 gradually increases. The position closer to the signal input terminal 70 in the second direction y can be called the near end, and the position farther from the signal input terminal 70 can be called the far end. As shown in FIG. Fig.15 As shown, a dimming zone 11 is provided in the partition row 10H at the remote position. Optionally, a dimming zone 11 is provided in at least one partition row 10H at the remote position. The structure in the dimming zone 11 and the wiring of the partition circuit 30 can be understood with reference to the above-mentioned related embodiments, and will not be repeated here. The partition 10 at the remote position is far away from the signal input terminal 70, and the length of the wiring connecting the signal input terminal 70 to the partition 10 is long, resulting in a large voltage division of the wiring, which affects the brightness of the partition 10 at the remote position. In the embodiment of the present invention, a dimming zone 11 is provided in at least one partition row 10H at the remote position. The dimming zone 11 can adjust the size of the voltage value provided to the partition circuit 30 by monitoring the real-time equivalent resistance of the photosensitive module 32, and can realize the adjustment of the brightness of the dimming zone 11, so that the brightness of the dimming zone 11 is consistent with the expected brightness, thereby improving the brightness uniformity of each partition.

[0079] In other embodiments, Fig.16 A schematic diagram of another light emitting device provided by an embodiment of the present invention, such as Fig.16 As shown, the light emitting device 100 includes a plurality of partitions 10, and the plurality of partitions 10 are arranged in an array, the plurality of partitions 10 are arranged in a first direction into partition rows 10H, and the plurality of partitions 10 are arranged in a second direction y into partition columns 10L, and the first direction x and the second direction y intersect. The partitions 10 at the edges of the partition array are set as dimming zones 11. The structure in the dimming zone 11 and the wiring of the partition circuit 30 can be understood with reference to the above-mentioned related embodiments, and will not be repeated here. Since the light superposition effect of the partitions 10 at the edges of the partitions 10 is large, the brightness of the partitions 10 at the positions is dim (i.e., less than the expected brightness). In the embodiment of the present invention, the partitions 10 at the edges of the partition array are set as dimming zones 11. The dimming zones 11 can adjust the voltage value provided to the partition circuit 30 by monitoring the real-time equivalent resistance of the photosensitive module 32, and can adjust the brightness of the dimming zone 11, so that the brightness of the dimming zone 11 is consistent with the expected brightness, thereby improving the brightness uniformity of each partition.

[0080] In some embodiments, Fig.17A schematic diagram of another light emitting device provided by an embodiment of the present invention, such as Fig.17 As shown, the dimming zone 11 includes a first dimming zone 11a and a second dimming zone 11b, and the light-emitting device also includes a passive dimming zone 12; in the direction from the first dimming zone 11a to the second dimming zone 11b, n passive dimming zones 12 are arranged between the first dimming zone 11a and the second dimming zone 11b, n is an integer, and n≥1; the partition circuit 30 includes a first partition circuit and a second partition circuit, the first dimming zone 11a corresponds to the first partition circuit, and the second dimming zone 11b corresponds to the second partition circuit; the circuit structure and working state of the partition circuit 30 can be understood with reference to the above-mentioned related embodiments, and will not be repeated here.

[0081] In the embodiment of the present invention, the power module 40 is used to provide a first voltage value to the partition circuit 30 in the first state, wherein the first voltage value includes a preset voltage value, and the preset voltage value corresponds to the expected brightness of the dimming zone 11. That is to say, when the preset voltage value is provided to the first partition circuit of the first state corresponding to the first dimming zone 11a, the first dimming zone 11a can theoretically reach the expected brightness. When the preset voltage value is provided to the second partition circuit of the first state corresponding to the second dimming zone 11b, the second dimming zone 11b can theoretically reach the expected brightness. In fact, due to the voltage division effect of the circuit routing in the light-emitting device and the difference in position of the first dimming zone 11a and the second dimming zone 11b on the light-emitting device, the actual brightness of the first dimming zone 11a and the second dimming zone 11b may be different from the expected brightness.

[0082] The power module 40 provides a preset voltage value to the first partition circuit in the first state, the brightness adjustment module 50 monitors the real-time equivalent resistance of the photosensitive module 32 in the first dimming area 11a when the power module 40 provides the preset voltage value, and sends an adjustment instruction to the power module 40. In response to the adjustment instruction, the power module 40 provides a second voltage value V1 to the first partition circuit in the first state.

[0083] The power module 40 provides a preset voltage value to the second partition circuit in the first state, and the brightness adjustment module 50 monitors the real-time equivalent resistance of the photosensitive module 32 in the second dimming area 11b when the power module 40 provides the preset voltage value, and sends an adjustment instruction to the power module 40. In response to the adjustment instruction, the power module 40 provides a second voltage value V2 to the second partition circuit in the first state.

[0084] The light emitting device 100 further includes a gradient adjustment module 80, which is optionally integrated in the driver chip 61. The gradient adjustment module 80 is used to calculate the adjustment voltage values ​​corresponding to the n passive dimming zones 12 according to V1, V2, and n using the gradient adjustment rule, and feed the adjustment voltage values ​​back to the power module 40; the power module 40 is also used to provide power supply voltages to the n passive dimming zones 12 respectively according to the adjustment voltage values.

[0085] In the embodiment of the present invention, the light-emitting device includes a dimming zone 11 and a passive dimming zone 12. By monitoring the real-time equivalent resistance of the photosensitive module 32 in the dimming zone 11, the power supply voltage provided to the dimming zone 11 is adjusted from the first voltage value to the second voltage value, so that the brightness of the dimming zone 11 can be adjusted. And combined with the brightness adjustment results of the first dimming zone 11a and the second dimming zone 11b (the second voltage value is V1 and the second voltage value is V2), the brightness of the passive dimming zone 12 is adjusted using a gradient adjustment rule, so that the brightness of the passive dimming zone 12 is also close to the expected brightness, thereby improving the brightness uniformity. In this embodiment, the number of dimming zones 11 set in the light-emitting device is small, which can reduce the wiring space in the light-emitting device, and can also reduce the amount of calculation of the brightness adjustment module 50, thereby improving the response speed of the brightness adjustment.

[0086] In some embodiments, the gradient adjustment rule is an arithmetic adjustment rule. Fig.17 Taking the first dimming zone 11a and the second dimming zone 11b as an example, the distance between the first dimming zone 11a and the driver chip 61 is greater than the distance between the second dimming zone 11b and the driver chip 61. After being monitored by the brightness adjustment module 50, the second voltage value provided by the power module 40 to the first partition circuit in the first state is V1, and the second voltage value provided to the second partition circuit in the first state is V2, wherein V1 is greater than V2. In the direction from the first dimming zone 11a to the second dimming zone 11b, there are four passive dimming zones 12 arranged between the first dimming zone 11a and the second dimming zone 11b, and the distance from the driver chip 61 gradually decreases, then the voltage values ​​required by these four passive dimming zones 12 gradually decrease. Among them, the arithmetic difference adjustment rule can be used to set the adjustment voltage value corresponding to each passive dimming zone 12. The first dimming zone 11a points in the direction of the second dimming zone 11b, and the adjustment voltage values ​​corresponding to the four passive dimming zones 12 are: V1-(V1-V2) / 5, V1-2*(V1-V2) / 5, V1-3*(V1-V2) / 5, V1-4*(V1-V2) / 5.

[0087] In some implementations, the gradient adjustment rule may also be a non-equilibrium adjustment, which may be specifically set according to actual needs.

[0088] Fig.17In the embodiment, the light emitting device includes a plurality of partitions 10 arranged in an array. The first dimming zone 11a and the second dimming zone 11b are located in the same partition column 10L. The positions of the first dimming zone 11a and the second dimming zone 11b are only schematically indicated and are not intended to limit the present invention.

[0089] In other embodiments, the first dimming zone 11a and the second dimming zone 11b are located in the same sub-row 10H. For example, the first dimming zone 11a is located at the edge of the sub-row 10H, and the second dimming zone 11b is located in the middle of the sub-row 10H. The first dimming zone 11a and the second dimming zone 11b can be used to adjust the brightness of the passive dimming zone 12 in the sub-row 10H. The specific adjustment method can refer to the above Fig.17 The relevant descriptions in the embodiments are not repeated here.

[0090] Based on the same inventive concept, an embodiment of the present invention further provides a display device, Fig.18 A schematic diagram of a display device provided in an embodiment of the present invention, such as Fig.18 As shown, the display device includes a display panel 200 and a light emitting device 100 provided in any embodiment of the present invention. The light emitting device 100 provides a backlight source for the display panel 200. The display panel 200 is a liquid crystal display panel. The specific structure of the light emitting device 100 has been described in the above embodiment and will not be repeated here. The display device provided in the embodiment of the present invention includes but is not limited to electronic devices such as mobile phones, computers, tablets, and smart watches.

[0091] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A light emitting device, characterized in that: The light-emitting device includes a dimming zone and a partition circuit, and the partition circuit corresponds to the dimming zone; the partition circuit includes a light-emitting module and a photosensitive module, and the light-emitting module and the photosensitive module are located in the dimming zone; the partition circuit includes a first state, in which the light-emitting module and the photosensitive module are connected in series; the partition circuit also includes a second state and a third state, in which in the second state, only the photosensitive module of the light-emitting module and the photosensitive module is connected in series in the partition circuit, and in the third state, only the light-emitting module of the light-emitting module and the photosensitive module is connected in series in the partition circuit; The light emitting device also includes a power supply module and a brightness adjustment module; The power supply module is used to provide a power supply voltage to the partition circuit, wherein the power supply module provides a first voltage value to the partition circuit in the first state; The brightness adjustment module is used to monitor the real-time equivalent resistance of the photosensitive module when the power module provides the first voltage value, and send an adjustment instruction to the power module; The power module provides a second voltage value to the partition circuit in the first state in response to the adjustment instruction, the second voltage value being different from the first voltage value.

2. The light emitting device according to claim 1, characterized in that: The adjustment instruction includes a first adjustment instruction and a second adjustment instruction; The brightness adjustment module includes a comparison module, which is used to compare the real-time equivalent resistance with a standard resistance, and the standard resistance corresponds to the expected brightness of the dimming zone; wherein when the real-time equivalent resistance is greater than the standard resistance, the first adjustment instruction is sent to the power module; when the real-time equivalent resistance is less than the standard resistance, the second adjustment instruction is sent to the power module; The power module provides the second voltage value to the partition circuit in the first state in response to the first adjustment instruction, the second voltage value being greater than the first voltage value; The power module provides the second voltage value to the partition circuit in the first state in response to the second adjustment instruction, and the second voltage value is less than the first voltage value.

3. The light emitting device according to claim 1, characterized in that: The brightness adjustment module includes a sampling module and a calculation module; The sampling module is used to collect the current value in the partition circuit and send the current value to the calculation module; wherein the current value of the partition circuit in the first state collected by the sampling module is recorded as the first current value; The calculation module is used to calculate the total resistance of the partition circuit in the first state according to the first current value and the first voltage value, recorded as the first total resistance, and determine the real-time equivalent resistance according to the first total resistance, the resistance of the light-emitting module and the resistance of the wiring in the partition circuit.

4. The light emitting device according to claim 3, characterized in that: The brightness adjustment module further includes a resistance data table, in which the position information of the dimming zone and the resistance data correspond one to one, and the resistance data at least includes the resistance of the light-emitting module and the resistance of the wiring in the partition circuit; The calculation module is used to retrieve the resistance of the light-emitting module and the resistance of the wiring in the partition circuit in the resistance data table according to the position information of the dimming zone.

5. The light emitting device according to claim 3, characterized in that: The sampling module is further used to collect the current value of the partition circuit in the second state and record it as the second current value, and collect the current value of the partition circuit in the third state and record it as the third current value; The calculation module is further used to determine the resistance of the light-emitting module and the resistance of the wiring in the partition circuit according to the second current value and the third current value.

6. The light emitting device according to claim 5, characterized in that: The power module is further used to provide a third voltage value to the partition circuit in the second state, and to provide a fourth voltage value to the partition circuit in the third state; when the power module provides the third voltage value, the current value in the partition circuit is the second current value, and when the power module provides the fourth voltage value, the current value in the partition circuit is the third current value; The operation module is used to calculate the total resistance of the partition circuit in the second state according to the second current value and the third voltage value, recorded as the second total resistance, and determine the resistance of the wiring in the partition circuit according to the second total resistance and the initial resistance of the photosensitive module; The operation module is also used to calculate the total resistance of the partition circuit in the third state according to the third current value and the fourth voltage value, recorded as the third total resistance, and determine the resistance of the light-emitting module according to the third total resistance and the resistance of the wiring in the partition circuit.

7. The light emitting device according to claim 5, characterized in that: The light emitting device further includes a circuit control module, and the circuit control module is used to control the state of the partition circuit to realize that the partition circuit includes the first state, the second state and the third state.

8. The light emitting device according to claim 7, characterized in that: The circuit control module includes a first switch and a second switch, wherein the first switch is connected in parallel with the light emitting module and electrically connected to a first node of the partition circuit, and the second switch is connected in parallel with the light sensing module and electrically connected to the first node; wherein, The first switch and the second switch are both closed, and the partition circuit is in the first state; The first switch is turned on, the second switch is turned off, and the partition circuit is in the second state; The first switch is closed and the second switch is opened, and the partition circuit is in the third state.

9. The light emitting device according to claim 8, characterized in that: The first switch and the second switch are both located in the dimming zone.

10. The light emitting device according to claim 8, characterized in that: The light emitting device comprises a control line group, the control line group comprises a first control line and a second control line extending along a first direction, a control end of the first switch is coupled to the first control line, and a control end of the second switch is coupled to the second control line; The light emitting device comprises at least two dimming zones, and one dimming zone corresponds to one circuit control module; The circuit control modules corresponding to at least two dimming zones arranged in the first direction are coupled to the same control line group.

11. The light emitting device according to claim 1, characterized in that: The photosensitive module includes a thin film transistor or a photoresistor.

12. The light emitting device according to claim 1, characterized in that: The light-emitting device comprises a substrate, and the light-emitting module and the photosensitive module are located on the same side of the substrate; in a direction perpendicular to a plane where the substrate is located, the light-emitting module and the photosensitive module do not overlap.

13. The light emitting device according to claim 1, characterized in that: The photosensitive module is located at the geometric center of the dimming area.

14. The light emitting device according to claim 1, characterized in that: The dimming zone includes a first dimming zone and a second dimming zone, and the light emitting device further includes a passive dimming zone; in a direction from the first dimming zone to the second dimming zone, n passive dimming zones are arranged between the first dimming zone and the second dimming zone, where n is an integer and n≥1; The partition circuit includes a first partition circuit and a second partition circuit, the first dimming zone corresponds to the first partition circuit, and the second dimming zone corresponds to the second partition circuit; The first voltage value includes a preset voltage value, and the preset voltage value corresponds to the expected brightness of the dimming zone; The power supply module provides the preset voltage value to the first partition circuit in the first state, and in response to the adjustment instruction, provides the second voltage value V1 to the first partition circuit in the first state; the power supply module provides the preset voltage value to the second partition circuit in the first state, and in response to the adjustment instruction, provides the second voltage value V2 to the second partition circuit in the first state; The light emitting device further comprises a gradient adjustment module, which is used to calculate the adjustment voltage values ​​corresponding to the n passive dimming zones respectively according to V1, V2, and n by using a gradient adjustment rule, and feed the adjustment voltage values ​​back to the power module; The power supply module is further used to provide power supply voltage to the n passive dimming areas respectively according to the adjustment voltage value.

15. The light emitting device according to claim 1, characterized in that: The light emitting device comprises a plurality of partitions, wherein the plurality of partitions are arranged into partition rows in a first direction, and the plurality of partitions are arranged into partition columns in a second direction, and the first direction intersects with the second direction; the partition comprises at least one dimming zone; The light emitting device comprises a first power line and a second power line extending along the second direction, each of the partitions is respectively connected to one of the first power line and one of the second power line, and the first power line and the second power line are respectively coupled to the power module.

16. A display device, characterized in that: A light-emitting device comprising any one of claims 1 to 15.

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