Pixel circuit, display panel and electronic equipment

Abstract

The utility model relates to the technical field of display, and discloses a pixel circuit, a display panel and electronic equipment. The pixel circuit comprises a plurality of sub-pixel circuits, each sub-pixel circuit comprises a driving module and a light-emitting module, and each light-emitting module comprises a plurality of light-emitting units which are connected in parallel; the driving module is connected with the light-emitting module. Therefore, when one light-emitting device in the driving module is abnormal, such as short circuit or damage, other light-emitting units can still continuously emit light, and the sub-pixel where the light-emitting device is located cannot be displayed as a dark spot, so that the color deviation of composite light of the pixel point where the sub-pixel is located is reduced, and the display effect of a display picture is improved.

Description

Technical Field

[0001] This application relates to the field of display technologies, and particularly to a pixel circuit, a display panel, and an electronic device. Background Art

[0002] In the screen of an electronic device, there is a display area for displaying images. The display area includes multiple pixel points. Generally, a pixel point is composed of a red (R) sub-pixel, a green (G) sub-pixel, and a blue (B) sub-pixel. By adjusting the brightness ratio of the R sub-pixel, the G sub-pixel, and the B sub-pixel, the pixel point can display composite light of various colors. Therefore, each pixel point can display its respective color, and thus can piece together the complete image seen by the user on the screen.

[0003] Among them, the lights of the R sub-pixel, the G sub-pixel, and the B sub-pixel in the pixel point are respectively emitted by a light-emitting device. The light-emitting device emits light under the drive of a drive circuit, and then forms the composite light of a pixel point. However, if the light-emitting device has a short circuit, it will cause the sub-pixel corresponding to the color of the light-emitting device not to emit light, and then cause a color deviation in the composite light of the pixel point where the light-emitting device is located, affecting the display effect of the electronic device. Summary of the Utility Model

[0004] Embodiments of this application provide a pixel circuit, a display panel, and an electronic device, which are used to reduce the color deviation of the composite light displayed by the pixel point, thereby improving the display effect of the display screen and enhancing the user experience.

[0005] In a first aspect, this application provides a pixel circuit. The pixel circuit includes multiple sub-pixel circuits. Each sub-pixel circuit includes a drive module and a light-emitting module. Among them, the light-emitting module includes multiple parallel-connected light-emitting units; the drive module is connected to the light-emitting module.

[0006] According to the embodiments of this application, since the light-emitting module in the sub-pixel circuit includes multiple parallel-connected light-emitting units, when one light-emitting device in the drive module has an abnormality, such as a short circuit or damage, because the other light-emitting units in the sub-pixel circuit are in a parallel relationship with the abnormal light-emitting unit, therefore, the other light-emitting units can still continue to emit light, thereby reducing the color deviation of the composite light displayed by the pixel point, and further improving the display effect of the display screen and enhancing the user experience.

[0007] In some embodiments of the above first aspect, the light-emitting unit includes a light-emitting diode; wherein, the anode of the light-emitting diode is connected to the drive module.

[0008] In this way, the anodes of each light-emitting device are respectively connected to the driving module, so that each light-emitting device can independently receive the drive of the driving module and emit light. Furthermore, when one of the light-emitting devices in the driving module fails, the other light-emitting units can still continue to emit light, thereby improving the display effect.

[0009] In some embodiments of the first aspect described above, the light-emitting module further includes a switching unit; wherein, the switching unit is connected in series with the light-emitting unit; the first end of the switching unit is connected to the driving module, the second end is connected to the light-emitting unit, and the third end receives a switching control signal.

[0010] In this way, when any one of the light-emitting units is short-circuited or damaged, due to the provision of the switching unit, the position of the abnormal light-emitting unit can be located, thereby facilitating subsequent circuit repair to improve the current repair bottleneck for short-circuited light-emitting devices, which is beneficial to further improving the display performance of the electronic device.

[0011] In some embodiments of the first aspect described above, the switching unit includes a first switching transistor; wherein, one of the source and drain of the first switching transistor is connected to the driving module, and the other is connected to the light-emitting unit, and the gate of the first switching transistor receives the switching control signal.

[0012] In this way, when the light-emitting device is short-circuited or damaged, since the gate of the first switching transistor can receive the switching control signal, the position of the abnormal light-emitting device can be located, and then subsequent repair is facilitated to improve the performance of the display screen.

[0013] In some embodiments of the first aspect described above, the first switching transistor includes a thin-film transistor.

[0014] In some embodiments of the first aspect described above, the driving module includes a first light-emitting control unit, a first driving unit, and a second light-emitting control unit; wherein, the first end of the first light-emitting control unit is connected to the power supply voltage, the second end receives an enabling light-emitting signal, and the third end is connected to the first end of the first driving unit; the first end of the second light-emitting control unit is connected to the second end of the first driving unit, the second end receives an enabling light-emitting signal, and the third end is connected to the first end of the light-emitting unit.

[0015] In this way, through the first light-emitting control unit, the first driving unit, and the second light-emitting control unit in the driving module in sequence, each light-emitting unit can be driven to emit light, realizing the light emission of the sub-pixel. And through the common light emission of multiple sub-pixels, the composite light of the entire pixel is formed.

[0016] In some embodiments of the first aspect described above, the driving module further includes a first reset unit and a second reset unit; wherein, a first end of the first reset unit receives an enabling reset signal, a second end is connected to a reset voltage terminal, and a third end is connected to a third end of the first driving unit; a first end of the second reset unit receives an enabling reset signal, a second end is connected to the reset voltage terminal, and a third end is connected to a first end of the light-emitting unit.

[0017] In this way, the first reset unit and the second reset unit are used for the reset stage in the driving module to reset the anode of the light-emitting unit, and further to drive the light-emitting unit to emit light.

[0018] In some embodiments of the first aspect described above, the driving module further includes a first compensation unit, a first writing unit, and a first storage unit; wherein, a first end of the first compensation unit receives an enabling compensation signal, a second end is connected to a second end of the first driving unit and a first end of the second light-emitting control unit, and a third end is connected to a third end of the first driving unit and a third end of the first reset unit; a first end of the first writing unit is connected to a first end of the first driving unit and a third end of the first light-emitting control unit, a second end receives the enabling compensation signal, and a third end is connected to a compensation voltage terminal; a first end of the first storage unit is connected to a power supply voltage, and a second end is connected to a third end of the first driving unit, a third end of the first reset unit, and a third end of the first compensation unit.

[0019] In some embodiments of the first aspect described above, the first light-emitting control unit includes a first light-emitting control transistor, the first driving unit includes a first driving transistor, and the second light-emitting control unit includes a second light-emitting control transistor; the first reset unit includes a first reset transistor, and the second reset unit includes a second reset transistor; the first compensation unit includes a first compensation transistor, and the first writing unit includes a first writing transistor; the first storage unit includes a first storage capacitor.

[0020] In this way, the driving module is configured as a 7T1C circuit structure, that is, the driving module is composed of 7 transistors and 1 capacitor to realize the light-emitting drive of the light-emitting module.

[0021] In some embodiments of the first aspect described above, the driving module further includes a third reset unit; wherein, a first end of the third reset unit receives a reset signal, a second end receives the enabling reset signal, and a third end is connected to a first end of the first writing unit, a first end of the first driving unit, and a third end of the first light-emitting control unit.

[0022] In some embodiments of the first aspect described above, the third reset unit includes a third reset transistor.

[0023] Thus, the first light-emitting control transistor is combined with the circuit structure of the above 7T1C to form a circuit structure of 8T1C, so that the driving module is composed of 8 transistors and 1 capacitor to realize the light-emitting drive of the light-emitting module.

[0024] In some embodiments of the first aspect above, the driving module further includes a second storage unit, a second writing unit, and a first reference unit; wherein, the first end of the second storage unit is connected to the power supply voltage, and the second end is connected to the first end of the first storage unit, the first end of the second writing unit, and the first end of the first reference unit; the second end of the second writing unit receives a data signal, and the third end receives an enable signal; the second end of the first reference unit is connected to a reference voltage, and the third end receives an enable compensation signal.

[0025] In some embodiments of the first aspect above, the second storage unit includes a second storage capacitor, the second writing unit includes a second writing transistor, and the first reference unit includes a first reference transistor.

[0026] Thus, the second storage capacitor, the second writing transistor, and the first reference transistor are combined with the circuit structure of the above 7T1C to form a circuit structure of 9T2C, so that the driving module is composed of 9 transistors and 2 capacitors to realize the light-emitting drive of the light-emitting module.

[0027] In a second aspect, the present application provides a display panel including the pixel circuit in any one of the embodiments of the present application.

[0028] In some embodiments of the second aspect above, the electronic device where the pixel circuit is located includes a display area, the pixel circuit is arranged in the display area, and the arrangement manners of multiple parallel light-emitting units in the display area include: arranging in sequence along the first direction of the electronic device, arranging in sequence along the second direction of the display area, or arranging in an array along the first direction and the second direction of the display area; wherein, the first direction intersects with the second direction.

[0029] Thus, in the display area, the light of one sub-pixel can be composed of the light emitted by multiple light-emitting devices. Therefore, when one of the light-emitting devices is abnormal, the sub-pixel corresponding to the abnormal light-emitting device can still emit light, thereby improving the display effect.

[0030] In a third aspect, the present application provides an electronic device including a display panel, and the display panel includes the pixel circuit in any one of the embodiments of the present application.

[0031] For the beneficial effects of the second aspect and the third aspect above, reference may be made to the relevant descriptions in various embodiments of the first aspect above, and details are not described herein again. Description of the Drawings

[0032] To more clearly illustrate the technical solutions of the present application, the following will briefly introduce the drawings used in the description of the embodiments.

[0033] Figure 1 According to some embodiments of the present application, a schematic structural diagram of a tablet computer 10 is shown;

[0034] Figure 2A According to some embodiments of the present application, a schematic structural diagram of a pixel point a is shown;

[0035] Figure 2B According to some embodiments of the present application, a schematic structural diagram of a sub-pixel circuit 110 is shown;

[0036] Figure 2C According to some embodiments of the present application, a schematic circuit diagram of a sub-pixel circuit 110 is shown;

[0037] Figure 3A According to some embodiments of the present application, a schematic structural diagram of a sub-pixel circuit 120 is shown;

[0038] Figure 3B According to some embodiments of the present application, a schematic circuit diagram of a sub-pixel circuit 120 is shown;

[0039] Figure 3C According to some embodiments of the present application, a schematic circuit diagram of a sub-pixel circuit 120' is shown;

[0040] Figure 3D According to some embodiments of the present application, a schematic circuit diagram of a sub-pixel circuit 120" is shown;

[0041] Figure 4A According to some embodiments of the present application, a schematic structural diagram of a pixel point b is shown;

[0042] Figure 4B According to some embodiments of the present application, a schematic structural diagram of a pixel point c is shown;

[0043] Figure 4C According to some embodiments of the present application, a schematic structural diagram of a pixel point d is shown;

[0044] Figure 5 According to some embodiments of the present application, a schematic circuit diagram of a sub-pixel circuit 120a is shown;

[0045] Figure 6A According to some embodiments of the present application, a schematic structural diagram when the first pixel point b is abnormal is shown;

[0046] Figure 6BAccording to some embodiments of the present application, a schematic structural diagram when the second pixel point b is abnormal is shown;

[0047] Figure 6C According to some embodiments of the present application, a schematic structural diagram of pixel point b with the anodic lead of the light-emitting device EL1-G cut off is shown;

[0048] Figure 7 According to some embodiments of the present application, a circuit diagram of the sub-pixel circuit 120b is shown;

[0049] Figure 8A According to some embodiments of the present application, a schematic structural diagram when the third pixel point b is abnormal is shown;

[0050] Figure 8B According to some embodiments of the present application, a schematic structural diagram when the fourth pixel point b is abnormal is shown;

[0051] Figure 9A According to some embodiments of the present application, a schematic structural diagram when the fifth pixel point b is abnormal is shown;

[0052] Figure 9B According to some embodiments of the present application, a schematic structural diagram when the sixth pixel point b is abnormal is shown;

[0053] Figure 10A According to some embodiments of the present application, a schematic structural diagram when the seventh pixel point b is abnormal is shown;

[0054] Figure 10B According to some embodiments of the present application, a schematic structural diagram when the eighth pixel point b is abnormal is shown;

[0055] Figure 11A According to some embodiments of the present application, a schematic structural diagram when the ninth pixel point b is abnormal is shown;

[0056] Figure 11B According to some embodiments of the present application, a schematic structural diagram when the tenth pixel point b is abnormal is shown;

[0057] Figure 12A According to some embodiments of the present application, a schematic structural diagram when the eleventh pixel point b is abnormal is shown;

[0058] Figure 12B According to some embodiments of the present application, a schematic structural diagram when the twelfth pixel point b is abnormal is shown;

[0059] Figure 13A According to some embodiments of the present application, a schematic structural diagram when the thirteenth pixel point b is abnormal is shown;

[0060] Figure 13B According to some embodiments of the present application, a schematic structural diagram when the fourteenth type of pixel point b is abnormal is shown;

[0061] Figure 14 According to some embodiments of the present application, a schematic structural diagram of another tablet computer 10 is shown. Detailed implementation manners

[0062] Illustrative embodiments of the present application include, but are not limited to, pixel circuits, display panels, and electronic devices.

[0063] It should be understood that the technical solutions provided by the present application can be applied to any electronic device including a display panel. Among them, the electronic device includes, but is not limited to, mobile phones, tablet computers, personal computers, electronic watches, electronic bracelets, cameras, wearable devices, augmented reality (AR) devices, virtual reality (VR) devices, televisions, and other electronic devices. The embodiments of the present application do not limit the type and form of the electronic device, nor do they limit the type of the display panel.

[0064] It should be noted that the directional terms such as "upper", "lower", "left", and "right" in this article are exemplary directions of the structure in the present application, rather than indicating or implying that the components referred to must have a specific direction. It can change accordingly according to actual use and cannot be understood as a limitation to the present application. In addition, the first direction described in the embodiments of the present application can be the x direction in the drawings, and the second direction can be the y direction in the drawings.

[0065] For the convenience of description, some basic concepts and technical terms involved in the present application are introduced first.

[0066] A pixel point, also called a pixel, is the smallest unit in an image frame, displayed as a light point. Each pixel point contains specific color information, used to describe the color and brightness of the point displayed in the image frame. The light point of each pixel point is a composite light formed by mixing the lights of three sub-pixels of red, green, and blue.

[0067] Red, green, and blue (RGB): Red, green, and blue are the three primary colors of light. These three colors can be mixed in a certain proportion (strength) to produce various color changes. When the three are mixed in the same proportion, the composite light is displayed as white light.

[0068] In addition, generally, the side of the electronic device facing the user in the use state is called the front of the electronic device, and the side of the electronic device facing away from the user in the use state is called the back of the electronic device.

[0069] Figure 1 According to some embodiments, a schematic structural diagram of a tablet computer 10 is shown.

[0070] Figure 1 is a front view schematic diagram of the tablet computer 10. The tablet computer 10 includes a display panel. The front of the display panel includes a display area capable of displaying a picture to the user and a non-display area surrounding the display area. The display area is composed of a plurality of pixel points arranged in an array. It should be noted that only the pixel points in the central area are shown in the figure. The other areas in the display area are the same as the central area, and pixel points arranged in an array are provided, that is, all pixel points in the display area are arranged in the row direction (x direction) and the column direction (y direction).

[0071] Among them, each pixel point is composed of three-color sub-pixels, that is, one R sub-pixel, one G sub-pixel, and one B sub-pixel, and each pixel point is driven to emit light through three independent sub-pixel driving modules (the driving module of the R sub-pixel, the driving module of the G sub-pixel, and the driving module of the B sub-pixel). By controlling the brightness of the corresponding color sub-pixels through the driving module, the pixel point is displayed as a composite light after mixing of the three colors. Furthermore, each pixel point displays its own color, so that the entire picture seen by the user can be formed in the display area.

[0072] Figure 2A According to some embodiments, a schematic structural diagram of a pixel point a is shown. It can be understood that in Figure 1 the shown display area, a plurality of pixel points a arranged in an array are included.

[0073] Among them, in the pixel point a, the positions of the R sub-pixel, the G sub-pixel, and the B sub-pixel are adjacent, so that a composite light after mixing of three colors visible to the naked eye of the user can be formed, that is, the pixel point a is displayed as a composite light point.

[0074] Specifically, the light of one R sub-pixel is emitted by a light-emitting device EL-R capable of emitting red light, the light of one G sub-pixel is emitted by a light-emitting device EL-G capable of emitting green light, and the light of one B sub-pixel is emitted by a light-emitting device EL-B capable of emitting blue light. When the light-emitting brightness of the above three light-emitting devices is the same, the pixel point a is displayed as white light visible to the human eye. On this basis, when the light-emitting degree of the R sub-pixel weakens, the color of the pixel point a will be biased towards cyan, when the light-emitting degree of the G sub-pixel weakens, the color of the pixel point a will be biased towards pink, and when the light-emitting degree of the B sub-pixel weakens, the color of the pixel point a will be biased towards yellow.

[0075] Currently, during the use of electronic devices, sometimes color deviation of pixel points in the screen occurs, which easily affects the user experience. Among them, in most cases, it is caused by foreign matter between the cathode and the anode of the light-emitting device, resulting in a short circuit of the light-emitting device and causing the light-emitting device to fail to emit light, that is, a dark spot is displayed at the position corresponding to the color sub-pixel.

[0076] Therefore, if any one of the R sub-pixel, G sub-pixel, and B sub-pixel shows as a dark point, it will greatly affect the emission color of pixel point a, and further affect the display effect.

[0077] Figure 2B According to some embodiments, a schematic structural diagram of a sub-pixel circuit 110 is shown. Figure 2C According to some embodiments, a schematic circuit diagram of a sub-pixel circuit 110 is shown. It can be understood that the above sub-pixel may include one of the R sub-pixel, G sub-pixel, and B sub-pixel. Through three such sub-pixel circuits 110, the R sub-pixel, G sub-pixel, and B sub-pixel can be respectively driven to emit light, thereby forming the composite light displayed by a pixel point a ( Figure 2A )

[0078] Specifically, the sub-pixel circuit 110 is composed of a driving module 111 and a light-emitting module 112. The light-emitting module 112 includes a light-emitting diode EL. Among them, the driving module 111 is used to drive the light-emitting diode EL to emit light, and the light of the light-emitting diode EL is displayed as the light of a sub-pixel.

[0079] It can be understood that the light-emitting diode EL is the light-emitting device of any one of the R sub-pixel, G sub-pixel, or B sub-pixel. Correspondingly, the driving module 111 may include one of the driving modules of the R sub-pixel, the driving module of the G sub-pixel, and the driving module of the B sub-pixel.

[0080] It should be noted that Figure 2C the structure of the driving module 111 in is 7T1C, that is, the driving module includes 7 transistors (transistor, T) and one capacitor (capacitor, C).

[0081] Specifically, Figure 2C the driving module 111 in includes: a reset transistor T1 (an example of the first reset unit and the first reset transistor in the present application), a compensation transistor T2 (an example of the first compensation unit and the first compensation transistor in the present application), a driving transistor T3 (an example of the first driving unit and the first driving transistor in the present application), a writing transistor T4 (an example of the first writing unit and the first writing transistor in the present application), a light-emitting control transistor T5 (an example of the first light-emitting control unit and the first light-emitting control transistor in the present application), a light-emitting control transistor T6 (an example of the second light-emitting control unit and the second light-emitting control transistor in the present application), a reset transistor T7 (an example of the second reset unit and the second reset transistor in the present application), and a storage capacitor Cst (an example of the first storage unit and the first storage capacitor in the present application).

[0082] In the sub-pixel circuit 110, the connection relationships of each part are as follows: The gate (first terminal) of the reset transistor T1 receives the enable reset signal Gn-1 (Reset), the source (second terminal) is connected to the reset voltage Vinit, and the drain (third terminal) is connected to the drain (third terminal) of the compensation transistor T2, the gate (third terminal) of the driving transistor T3, and the second terminal of the storage capacitor Cst. The gate (first terminal) of the compensation transistor T2 receives the enable compensation signal Gn (Reset_n+1), and the source (second terminal) is connected to the drain (second terminal) of the driving transistor T3 and the source (first terminal) of the light-emitting control transistor T6. The source (first terminal) of the driving transistor T3 is connected to the drain (first terminal) of the writing transistor T4 and the drain (third terminal) of the light-emitting control transistor T5. The gate (second terminal) of the writing transistor T4 is connected to the enable compensation signal Gn, and the source (third terminal) is connected to the compensation voltage Vdata. The gate (second terminal) of the light-emitting control transistor T5 receives the enable light-emitting signal EM, and the source (first terminal) is connected to the power supply voltage VDD and the first terminal of the storage capacitor Cst. The gate (second terminal) of the light-emitting control transistor T6 receives the enable light-emitting signal EM, and the drain (third terminal) is connected to the anode (first terminal) of the light-emitting diode EL and the drain (third terminal) of the reset transistor T7. The gate (first terminal) of the reset transistor T7 receives the enable reset signal Gn-1, and the source (second terminal) is connected to the reset voltage Vinit. The cathode (second terminal) of the light-emitting diode EL is connected to the ground terminal voltage Vss.

[0083] It should be noted that in the embodiments of the present application, the source and drain of each transistor can be interchanged under certain conditions. Therefore, there is no difference between the source and drain of each transistor in terms of the description of the connection relationship. That is, the source or drain of each transistor described in the embodiments of the present application can be interchanged according to actual needs, and no limitation is made here.

[0084] For the convenience of understanding, the working principle of the above sub-pixel circuit 110 is described below.

[0085] If you want to control the light-emitting diode EL in the sub-pixel circuit 110 to emit light, that is, the sub-pixel emits light, it needs to go through the following three working stages: the reset stage, the compensation stage, and the light-emitting stage.

[0086] In the reset stage, the enable reset signal Gn-1 is turned on, and the enable compensation signal Gn and the enable light-emitting signal EM are turned off. At this time, the reset voltage Vinit charges the node N1 through the reset transistor T1 and charges the anode of the light-emitting diode EL through the reset transistor T7, so that the light-emitting diode EL is turned off and the voltage of the node N1 is initialized. Among them, the node N1 is connected to the drain of the reset transistor T1, the drain of the compensation transistor T2, and the storage capacitor Cst.

[0087] During the compensation phase, the enable compensation signal Gn is turned on, and the enable reset signal Gn-1 and the enable emission signal EM are turned off. At this time, the compensation voltage Vdata charges the node N1 through the write transistor T4, the driving transistor T3, and the compensation transistor T2, so that the voltage of the node N1 reaches the emission voltage of the light-emitting diode EL.

[0088] During the emission phase, the enable emission signal EM is turned on, and the enable compensation signal Gn and the enable reset signal Gn-1 are turned off. At this time, the power supply voltage VDD flows through the turned-on emission control transistor T5, the driving transistor T3, the emission control transistor T6, and the light-emitting diode EL to the ground terminal voltage Vss, so that the light-emitting diode EL emits light with a certain brightness.

[0089] As described above, the driving modules of the R sub-pixels, the G sub-pixels, and the B sub-pixels are all connected to only one light-emitting device. If the light-emitting device is short-circuited, for example, the internal damage of the light-emitting diode EL, or the short circuit between the anode and the cathode of the light-emitting diode EL due to other factors, it will cause the generation of dark spots, resulting in a deviation in the composite light color of the pixel point where the sub-pixel is located, and further affecting the overall display screen.

[0090] Based on the above description, how to improve the color deviation of pixel points and improve the display effect is an urgent problem to be solved at present.

[0091] To solve the above problems, an embodiment of the present application provides a pixel circuit. The pixel circuit includes a plurality of sub-pixel circuits, and each sub-pixel circuit can be one of an R sub-pixel circuit, a G sub-pixel circuit, or a B sub-pixel circuit. For example, the pixel circuit can include an R sub-pixel circuit, a G sub-pixel circuit, and a B sub-pixel circuit. Among them, a sub-pixel circuit includes a driving module and a light-emitting module, and the light-emitting module includes at least two parallel light-emitting units. The light emitted by the at least two parallel light-emitting units forms the light of a sub-pixel (any one of an R sub-pixel, a G sub-pixel, or a B sub-pixel), and is driven to emit light by a driving module. For example, each light-emitting unit can include a light-emitting device, that is, the driving module of an R sub-pixel circuit can drive two or more red-light-emitting units to emit light simultaneously, that is, an R sub-pixel emits light; the driving module of a G sub-pixel circuit can drive two or more green-light-emitting units to emit light simultaneously, that is, a G sub-pixel emits light; the driving module of a B sub-pixel circuit can drive two or more blue-light-emitting units to emit light simultaneously, that is, a B sub-pixel emits light. It should be noted that among the multiple sub-pixel circuits in the same pixel circuit, the number of light-emitting units of each sub-pixel circuit can be the same or different. As Figure 3BAs shown, the light-emitting module 122 in the sub-pixel circuit 120 includes a light-emitting diode EL1 and a light-emitting diode EL2 connected in parallel, and may also include other parallel light-emitting units. Specifically, when the electronic device is operating normally, both the light-emitting diode EL1 and the light-emitting diode EL2 can be turned on and emit light by the driving module. Thus, when one of the light-emitting devices connected to the driving module is abnormal, such as short-circuited or damaged, since the other light-emitting devices in this sub-pixel circuit are in parallel with the abnormal light-emitting device, therefore, the other light-emitting devices can still continue to emit light, thereby reducing the color deviation of the composite light displayed by this pixel, and further improving the display effect of the display screen and enhancing the user experience.

[0092] To make the above objects, features, and advantages of the present application more obvious and understandable, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0093] Figure 3A According to some embodiments, a schematic structural diagram of a sub-pixel circuit 120 is shown. Figure 3B According to some embodiments, a schematic circuit diagram of a sub-pixel circuit 120 is shown. It can be understood that the above sub-pixel may include one of an R sub-pixel, a G sub-pixel, and a B sub-pixel. An R sub-pixel circuit, a G sub-pixel circuit, and a B sub-pixel circuit can form a pixel circuit, that is, form the composite light displayed by a pixel point.

[0094] In some embodiments, the sub-pixel circuit 120 is composed of a driving module 121 and a light-emitting module 122. The light-emitting module 122 includes a light-emitting diode EL1 and a light-emitting diode EL2 connected in parallel. Figure 3B The ellipsis in it indicates that the light-emitting module 122 may also include a greater number of parallel light-emitting devices. Among them, the driving module 121 is used to drive the light-emitting module 122 to emit light, that is, the driving module 121 can drive all the light-emitting devices in the light-emitting module 122 to emit light together to form the light of a sub-pixel.

[0095] In some embodiments, the structure of the driving module 121 is 7T1C, and its specific structure and working principle are the same as those of the above driving module 111 ( Figure 2C ), and reference can be made to the relevant content of the above driving module 111, which will not be elaborated here.

[0096] In other embodiments of the present application, in the driving module 121, the gate of the reset transistor T7 can also receive an enable compensation signal Gn for resetting. The specific working principle is the same as the above principle and will not be elaborated here.

[0097] Specifically, each transistor in the driving module can be a thin film transistor (TFT). It should be noted that the transistors in the pixel circuit can also be set to other types of transistors according to needs, which is not limited herein.

[0098] In some embodiments, the light-emitting device can include a light-emitting diode and can also include other electronic components capable of emitting light, which is not limited in this application.

[0099] In some embodiments, the anodes of each light-emitting device are respectively connected to the driving module, so that each light-emitting device can independently receive the driving of the driving module and emit light. In this way, when one light-emitting device in the driving module is abnormal, other light-emitting units can still continue to emit light, thereby improving the display effect.

[0100] In addition, the cathodes of each light-emitting device are grounded. Specifically, the cathodes of each light-emitting device can be grounded separately or connected together and then grounded together.

[0101] Figure 3C According to some embodiments, a circuit schematic diagram of a sub-pixel circuit 120' is shown.

[0102] The difference between the sub-pixel circuit 120' and the sub-pixel circuit 120 is only that: the driving module 121' of the sub-pixel circuit 120' adopts an 8T1C circuit structure, and the driving principle of the driving module 121' is similar to that of the above-mentioned driving module 121, which will not be elaborated herein.

[0103] Specifically, the driving module 121' adds a reset transistor T10 (an example of the third reset unit and the third reset transistor in this application) on the basis of the structure of the driving module 121. The source (the first end) of the reset transistor T10 receives a reset signal DVH, the drain (the third end) is connected to the drain of the writing transistor T4, the source of the driving transistor T3, and the drain of the light-emitting control transistor T5, and the gate (the second end) receives an enable reset signal Gn-1.

[0104] Figure 3D According to some embodiments, a circuit schematic diagram of a sub-pixel circuit 120'' is shown.

[0105] The difference between "sub-pixel circuit 120"" and sub-pixel circuit 120 lies only in that the driving module 121"" of sub-pixel circuit 120"" adopts a 9T2C circuit structure, that is, on the basis of the structure of driving module 121, a storage capacitor Cst’ (an example of the second storage capacitor in this application), a writing transistor T11 (an example of the second writing transistor in this application), and a reference transistor T12 (an example of the first reference transistor in this application) are added between the power supply voltage VDD and the storage capacitor Cst.

[0106] Specifically, the first end of the storage capacitor Cst’ is connected to the power supply voltage VDD, and the second end (i.e., node N3) is connected to the first end of the storage capacitor Cst, the drain (first end) of the writing transistor T11, and the drain (first end) of the reference transistor T12; the source (second end) of the writing transistor T11 is connected to the data signal line DL, and the gate (third end) receives the enable signal Gx; the source (second end) of the reference transistor T12 is connected to the reference voltage Vref, and the gate (third end) receives the enable compensation signal Gn.

[0107] The above storage capacitor Cst’ is used to store the voltage difference between the power supply voltage VDD and node N3. The writing transistor T11 is used to transmit the data signal in the data signal line DL to node N3 when receiving the enable signal Gx, and the reference transistor T12 is used to initialize the voltage of node N3 to the reference voltage Vref when receiving the enable compensation signal Gn.

[0108] The structures and working principles of the remaining parts in the above driving module 121"" are the same as those of the above driving module 121, and will not be elaborated here.

[0109] It should be noted that the driving module described in the following embodiments is exemplified by the driving module 121, but the driving module in each embodiment of this application can also adopt the driving module 121’ in the sub-pixel circuit 120’ or the driving module 121"" in the sub-pixel circuit 120"", that is, in the pixel circuit provided by this application, the driving module can adopt any one of the structures of 7T1C, 8T1C, and 9T2C, which is not limited here. In addition, in other embodiments, the driving module can also adopt other structures, not limited to the 7T1C, 8T1C, and 9T2C structures, and this application does not impose any restrictions on the specific structure of the driving module.

[0110] Figure 4A According to some embodiments, a schematic structural diagram of a pixel point b is shown. It can be understood that the pixel point b includes an R sub-pixel, a G sub-pixel, and a B sub-pixel, and the light of each sub-pixel can be generated by the sub-pixel circuit 120 ( Figure 3B) is formed by the light emission of the light-emitting module 122 therein. Among them, the light of the R sub-pixel is formed by the combined light emission of the light-emitting diode EL1-R and the light-emitting diode EL2-R, the light of the G sub-pixel is formed by the combined light emission of the light-emitting diode EL1-G and the light-emitting diode EL2-G, and the light of the B sub-pixel is formed by the combined light emission of the light-emitting diode EL1-B and the light-emitting diode EL2-B.

[0111] It should be noted that the schematic structural diagram of the pixel points shown in the various drawings of the present application is the angle corresponding to the perspective when the user uses the electronic device, that is, the planar structure diagram of the pixel points displayed on the front of the display panel.

[0112] In some embodiments, in the R sub-pixel, the light-emitting diode EL1-R and the light-emitting diode EL2-R may be adjacent along the x direction. In the G sub-pixel, the light-emitting diode EL1-G and the light-emitting diode EL2-G may be adjacent along the x direction. In the B sub-pixel, the light-emitting diode EL1-B and the light-emitting diode EL2-B may be adjacent along the x direction.

[0113] Continue to refer to Figure 4A , in some embodiments, an anode via is further provided on each light-emitting device, and the anode via corresponds to the position of the anode terminal. Among them, the anode via is used to pass the lead connected to the anode terminal in the light-emitting device, and the lead is used to connect to the driving module.

[0114] In some embodiments, the anode via may be provided at the edge position of the light-emitting device. Specifically, as Figure 4A shown, the anode terminals of the light-emitting diode EL1-R, the light-emitting diode EL1-G, and the light-emitting diode EL1-B may be provided at the upper left corner of the light-emitting diode, that is, the anode via may be provided at the upper left corner of the light-emitting diode, and the anode terminals of the light-emitting diode EL2-R, the light-emitting diode EL2-G, and the light-emitting diode EL2-B may be provided at the lower right corner of the light-emitting diode, that is, the anode via may be provided at the lower right corner of the light-emitting diode.

[0115] It should be noted that in other embodiments, the anode terminal or the anode via may also be provided at other positions of the light-emitting device, which is not limited herein, so that the anode terminal of each light-emitting device is connected to the driving module through a lead.

[0116] Figure 4B According to some embodiments, a schematic structural diagram of a pixel point c is shown.

[0117] The pixel point c is only different from the pixel point b in the arrangement manner of the light-emitting devices. Therefore, the specific structural description of the pixel point c can refer to the description in the above pixel point b. The difference is only that in the pixel point c, the two light-emitting devices in each sub-pixel are adjacent along the y direction.

[0118] Figure 4C According to some embodiments, a schematic structural diagram of a pixel d is shown.

[0119] For the specific structural description of pixel d, reference may be made to the description of pixel b above. The difference is only that the number and arrangement of the light-emitting units in each sub-pixel in pixel d are different from those in pixel b. Among them, each sub-pixel in pixel d includes four light-emitting units, that is, four light-emitting devices, and the light-emitting devices are arranged in an array along the y direction and the x direction.

[0120] Among them, the light of the R sub-pixel in pixel d is formed by the combined light emission of light-emitting diodes EL1-R, EL2-R, EL3-R, and EL4-R; the light of the G sub-pixel is formed by the combined light emission of light-emitting diodes EL1-G, EL2-G, EL3-G, and EL4-G; and the light of the B sub-pixel is formed by the combined light emission of light-emitting diodes EL1-B, EL2-B, EL3-B, and EL4-B.

[0121] It should be noted that in the same pixel, the light of each sub-pixel can also be formed by different numbers of light-emitting devices, and the number of light-emitting devices included in each sub-pixel is not limited to the number described in the above embodiments. For example, the light of a sub-pixel can also be formed by the combined light emission of three, five, or more light-emitting devices. The present application does not limit this.

[0122] In addition, Figure 4A 、 Figure 4B and Figure 4C The pixel structures shown can all be applied to any one of the above sub-pixel circuits 120, 120', or 120", and can also be applied to sub-pixel circuits of driving modules with other structures. The present application does not limit this.

[0123] Figure 5 According to some embodiments of the present application, a circuit diagram of a sub-pixel circuit 120a is shown.

[0124] Among them, the sub-pixel circuit 120a includes a driving module 121 and a light-emitting module 122a. The light-emitting module 122a includes light-emitting diodes EL1 and EL2 connected in parallel, and a switch T8 (an example of the first switching transistor in the present application) is also connected in series with the light-emitting diode EL2.

[0125] Specifically, the first end of the switch T8 is connected to the driving module 121, the second end is connected to the light-emitting diode EL2, and the third end receives a switch control signal Se. The switch control signal Se is used to control the on or off of the switch T8.

[0126] Among them, the relevant description of the driving module 121 can refer to the above-mentioned embodiments and will not be elaborated here.

[0127] When the electronic device is working properly, the switch T8 is turned on, that is, set to the conducting state. At this time, the light-emitting diode EL2 connected in series with the switch T8 conducts, so that both the light-emitting diode EL1 and the light-emitting diode EL2 can emit light normally. When any one of the light-emitting diode EL1 and the light-emitting diode EL2 is short-circuited or damaged, the switch T8 can be switched from the conducting state to the off state to locate the abnormal light-emitting diode (see the following embodiments for the specific process), so as to facilitate subsequent circuit maintenance, improve the current maintenance bottleneck for short-circuited light-emitting devices, and thus contribute to further improving the display performance of the electronic device.

[0128] In some embodiments, the switch T8 can be a TFT transistor. It should be noted that only the switch T8 is taken as an example of the switch unit in this embodiment. In other embodiments, the switch unit can include a larger number of transistors, or other electronic devices can also be used as long as they can achieve the function of conduction or cut-off.

[0129] Specifically, the source electrode of the switch T8 is connected to the driving module, the drain electrode is connected to the light-emitting diode EL2, and the gate electrode receives the switch control signal Se. Among them, when the switch control signal Se is at a high level, the switch T8 is turned off; when the switch control signal Se is at a low level, the switch T8 is turned on. It should be noted that in other embodiments, the following switch T8 can also be used: when the switch control signal Se is at a high level, the switch T8 is turned on; when the switch control signal Se is at a low level, the switch T8 is turned off.

[0130] In other embodiments, the position of the switch T8 can also be set to be connected in series with the light-emitting diode EL1, and its principle and effect are the same as the above content and will not be elaborated here.

[0131] Furthermore, in some embodiments, based on the pixel circuit provided in this application, when any pixel point in the display panel of the electronic device has a color deviation, that is, an abnormal pixel point appears, the following circuit detection and repair method can also be adopted:

[0132] S1: Obtain the position of the pixel circuit where the abnormal pixel point is located;

[0133] S2: Locate the position of the abnormal light-emitting device in the pixel circuit;

[0134] S3: Disconnect the connection between the abnormal light-emitting device and the driving module;

[0135] S4: Perform brightness compensation on the remaining light-emitting devices in the sub-pixel circuit where the abnormal light-emitting device is located.

[0136] It should be noted that in the above circuit detection and repair method, only one, two or three of S1, S2, S3 and S4 can be executed, or all of S1, S2, S3 and S4 can be executed. For example, after abnormal pixel points appear, S1, S2 and S3 can be selected to remove the abnormal light-emitting device from the sub-pixel circuit; S1, S2 and S4 can also be selected to increase the brightness of the light-emitting devices other than the abnormal light-emitting device in the sub-pixel circuit, so as to increase the sub-pixel brightness and further improve the color deviation problem of the pixel point; or all of the above S1, S2, S3 and S4 can be executed.

[0137] The above circuit detection method and repair method can ensure the normal operation of the remaining light-emitting devices in the sub-pixel circuit after the connection of the abnormal light-emitting device is cut off by setting a plurality of parallel light-emitting devices in the sub-pixel circuit, and can further improve the color deviation of the pixel point by repairing the pixel circuit, thereby improving the display effect of the electronic device.

[0138] Specifically, in S1, the position of the pixel circuit where the abnormal pixel point is located can be located through the addressing function of automatic optical inspection (AOI); or, the position of the pixel circuit where the abnormal pixel point is located can also be located by the way of human eye observation. Further, the position of the abnormal sub-pixel circuit can also be located.

[0139] Specifically, in S2, by switching the switch state in the abnormal pixel circuit, for example, the specific position of the abnormal light-emitting device can be located by judging whether the brightness of each sub-pixel circuit changes before and after the switch is turned off. The specific positioning process in S2 can be seen in the following embodiments for details.

[0140] Specifically, in S3, the anode lead of the abnormal light-emitting device can be cut off, so as to disconnect the connection between the abnormal light-emitting device and the driving module. For example, the anode lead can be cut off from the outside of the electronic device by using a laser cutting method.

[0141] Specifically, in S4, brightness compensation is performed on the remaining light-emitting devices in the sub-pixel circuit where the abnormal light-emitting device is located, that is, the brightness of the remaining light-emitting devices is increased to make up for the brightness loss of the abnormal light-emitting device, so as to increase the light-emitting brightness of the sub-pixel and further improve the color deviation of the pixel point.

[0142] Figure 6A 、 Figure 6B According to some embodiments of the present application, schematic structural diagrams when pixel point b is abnormal are respectively shown. Among them, Figure 6A and Figure 6BThe switches T8 in it are all in the off state.

[0143] Specifically, as Figure 6A and 6B shown, if in the above S1 process, the position of the pixel circuit where the abnormal pixel b is located is obtained, and it is obtained that in the abnormal pixel b, the G sub-pixel is the abnormal sub-pixel, that is, there is an abnormal light-emitting device in the G sub-pixel circuit. Then, the process of S2 next can include the following contents:

[0144] S21: Change the switches T8 in each sub-pixel circuit (such as Figure 5 the R sub-pixel circuit, G sub-pixel circuit and B sub-pixel circuit shown) in the pixel circuit from the on state to the off state. For example, the switch control signal Se can be switched from a low level to a high level, so that the light-emitting diodes EL2-R, EL2-G, and EL2-B are disconnected from their respective connected driving modules, that is, the light-emitting diodes EL2-R, EL2-G, and EL2-B do not emit light.

[0145] S22: If the light-emitting diode EL1-G does not emit light ( Figure 6A ), the abnormal light-emitting device is the light-emitting diode EL1-G; if the light-emitting diode EL1-G emits light ( Figure 6B ), the abnormal light-emitting device is the light-emitting diode EL2-G.

[0146] Through the above process, the abnormal light-emitting device in the pixel circuit where the abnormal pixel b is located can be located, so as to facilitate the excision of the abnormal light-emitting device and / or the brightness compensation of the remaining light-emitting devices. Thus, setting multiple parallel light-emitting devices in each sub-pixel circuit can not only ensure that the sub-pixel can continue to emit light when an abnormal situation occurs, but also facilitate the subsequent repair of the abnormal light-emitting device. Thus, while improving the display effect, the repair efficiency of the electronic device after an abnormality can also be improved to further improve the display performance.

[0147] Figure 6C According to some embodiments of the present application, a schematic structural diagram of the pixel b for cutting off the anode lead of the light-emitting device EL1-G is shown. It can be understood that Figure 6C is the corresponding drawing after S3 is executed after it is located that the abnormal light-emitting device is the light-emitting diode EL1-G in S2.

[0148] Specifically, the connection line (lead) of the anode of the light-emitting diode EL1-G can be cut off by laser, so that the light-emitting diode EL1-G is disconnected from the driving module, so as to further ensure the normal operation of the remaining light-emitting devices in the sub-pixel circuit.

[0149] InFigure 6C After cutting the lead of the anodic terminal of the middle cut-off light-emitting diode EL1-G, the operation in S4 can still be continued. Specifically, S4 may include the following: by increasing the compensation voltage Vdata, the brightness of the light-emitting diode EL2-G is increased; for example, the brightness of the light-emitting diode EL2-G can be increased to the sum of the brightnesses of the light-emitting diode EL1-G and the light-emitting diode EL2-G before the light-emitting diode EL1-G is short-circuited, or the brightness of the light-emitting diode EL2-G can be increased to other brightness levels more suitable for the display screen, so as to further improve the display effect.

[0150] It should be noted that only by adopting the pixel circuit structure provided in this application can the display effect of the electronic device be improved. On this basis, further, the pixel circuit structure provided in this application can also facilitate the detection and repair of abnormal circuits. For specific descriptions, reference can be made to the above embodiments. Therefore, based on the pixel circuit structure provided in this application and adopting the circuit detection method and repair method described in the above embodiments, the display performance of the electronic device can be further improved on the basis of improving the display effect, thereby further enhancing the user's viewing experience.

[0151] Figure 7 According to some embodiments of the present application, a circuit diagram of a sub-pixel circuit 120b is shown.

[0152] The sub-pixel circuit 120b is similar in structure to the sub-pixel circuit 120a, and the difference between the two is only that: in the sub-pixel circuit 120b, a switch T8 is connected in series with the light-emitting diode EL1, and a switch T9 is connected in series with the light-emitting diode EL2. Other structures in the sub-pixel circuit 120b can refer to the above embodiments and will not be elaborated here.

[0153] Each light-emitting device in the above sub-pixel circuit 120b is connected in series with a switch, so that independent control of each light-emitting device can be realized, which is convenient for locating the position of the abnormal light-emitting device when detecting the abnormal circuit.

[0154] Specifically, the source of switch T8 is connected to the driving module 121, the drain is connected to the light-emitting diode EL1, and the gate receives the switch control signal A1; the source of switch T9 is connected to the driving module 121, the drain is connected to the light-emitting diode EL2, and the gate receives the switch control signal A2. Among them, the switch control signal A1 is used to control the conduction or cut-off of switch T8, and the switch control signal A2 is used to control the conduction or cut-off of switch T9. For example, when the switch control signal A1 is at a high level, switch T8 is turned off; when the switch control signal A1 is at a low level, switch T8 is turned on; the same applies to switch T9. It should be noted that in other embodiments, switches T8 and / or T9 with the following control methods can also be used: when the switch control signal A1 is at a high level, switch T8 is turned on; when the switch control signal A1 is at a low level, switch T8 is turned off; the same applies to switch T9.

[0155] When the electronic device is operating normally, both switch T8 and switch T9 are turned on, that is, both are set to the conducting state. At this time, the light-emitting diodes EL1 and EL2 are turned on, so that both the light-emitting diodes EL1 and EL2 can emit light normally. When any one of the light-emitting diodes EL1 and EL2 is short-circuited or damaged, the other can still continue to emit light, so that the sub-pixel where it is located can continue to emit light, thus ensuring that the sub-pixel will not be displayed as a dark spot, thereby improving the color deviation of the entire pixel and enhancing the display performance of the electronic device.

[0156] In some embodiments, switch T8 can be a TFT transistor, and switch T9 can be a TFT transistor. It should be noted that switches T8 and T9 can also use other electronic devices as long as they can achieve the function of conduction or cut-off.

[0157] It can be understood that the pixel circuit composed of the sub-pixel circuit 120b can also adopt S1-S4 in the circuit detection method and repair method in the above embodiments, which will not be elaborated here.

[0158] Figures 8A - 13B According to some embodiments of the present application, schematic structural diagrams when pixel point b is abnormal are respectively shown. Specifically, Figures 8A - 13B For the case where different light-emitting devices in the sub-pixel circuit 120b ( Figure 7 ) have short-circuit conditions, it is a schematic structural diagram of pixel point b where the abnormal light-emitting device is located.

[0159] In the pixel circuit composed of the sub-pixel circuit 120b ( Figure 7 ), S2 in the circuit detection and repair method can include the following process:

[0160] S21’: In the pixel circuit, turn on one of the switches T8 and T9 of each sub-pixel circuit and turn off the other.

[0161] S22': If the light-emitting diode in series with the turned-on switch does not emit light, then this light-emitting diode is an abnormally light-emitting diode.

[0162] It should be noted that in the above S21', the switch T8 can be turned on and the switch T9 can be turned off, or the switch T9 can be turned on and the switch T8 can be turned off. For example, when the switch T8 is turned on and the switch T9 is turned off, if the light-emitting diode EL1 does not emit light, it is an abnormally light-emitting diode; if the light-emitting diode EL1 emits light normally, then S21' and S22' can be repeatedly executed: turn on the switch T9 and turn off the switch T8. If the light-emitting diode EL2 does not emit light, it is an abnormally light-emitting diode.

[0163] In other embodiments, if a sub-pixel circuit includes more than two light-emitting devices, a switch can be connected in series with each light-emitting device. Then S21' includes: turning on one of the switches and turning off all other switches; S22' includes: if the light-emitting diode in series with the turned-on switch does not emit light, then this light-emitting diode is an abnormally light-emitting diode; if the light-emitting diode in series with the turned-on switch emits light normally, then S21' can be repeatedly executed to turn on another switch and turn off all other switches, and so on, until the abnormally light-emitting device is located.

[0164] Figure 8A 、 Figure 8B According to some embodiments of the present application, schematic structural diagrams when the pixel point b is abnormal are respectively shown. Among them, Figure 8A in each sub-pixel circuit 120b ( Figure 7 ), the switch T9 is in the off state and the switch T8 is in the on state; Figure 8B in it, the switch T8 is in the off state and the switch T9 is in the on state.

[0165] The following Table 1 shows, according to some embodiments of the present application, Figure 8A and Figure 8B the on / off states of each light-emitting device in. Among them, "√" indicates that the light-emitting device emits light, and "×" indicates that the light-emitting device does not emit light. According to the on / off states of each light-emitting device, it can be determined that the abnormally light-emitting device is the light-emitting device EL1-R, that is, the light-emitting device EL1-R is short-circuited or damaged.

[0166] Table 1

[0167]

[0168] Specifically, as shown in Table 1 and Figure 8A shown, if in the above S1 process, the position of the pixel circuit where the abnormal pixel point b is located is obtained, the following content can be included in the process of S21' next:

[0169] S211: Turn off switch T9 in each sub - pixel circuit (such as the R sub - pixel circuit, G sub - pixel circuit, and B sub - pixel circuit shown in Figure 7 ) in the pixel circuit, and turn on switch T8. For example, the switch control signal A2 can be switched from low level to high level, so that the light - emitting diodes EL2 - R, EL2 - G, and EL2 - B in the pixel circuit are disconnected from the driving module.

[0170] The process of S22’ can include the following content:

[0171] S221: If it is detected that the light - emitting diode EL1 - R does not emit light, then the abnormal light - emitting device is the light - emitting diode EL1 - R.

[0172] As shown in Table 1 and Figure 8B , the process of S21’ can also include the following content:

[0173] S212: Turn on switch T9 in each sub - pixel circuit (such as the R sub - pixel circuit, G sub - pixel circuit, and B sub - pixel circuit shown in Figure 7 ) in the pixel circuit, and turn off switch T8. For example, the switch control signal A1 can be switched from low level to high level, so that the light - emitting diodes EL1 - R, EL1 - G, and EL1 - B in the pixel circuit are disconnected from the driving module.

[0174] The process of S22’ can include the following content:

[0175] S222: If it is detected that the light - emitting diodes EL2 - R, EL2 - G, and EL2 - B all emit light, then no abnormal light - emitting device is detected.

[0176] It should be noted that in the circuit detection method, after executing S211 and S221, that is, after detecting the abnormal light - emitting device, S212 and S222 may not be executed; or S212 and S222 can be executed first, that is, after no abnormal light - emitting device is detected, S211 and S221 are continued to be executed. That is to say, in S2, when an abnormal light - emitting device is detected, S2 can be ended and S3 in the above - mentioned detection method can be continued to be executed; when no abnormal light - emitting device is detected, S2 is repeated. For sub - pixel circuits with more than two light - emitting units, the above - mentioned detection method is the same and will not be elaborated here.

[0177] Through the above process, the position of the abnormal light - emitting device can be located, which is convenient for cutting off the abnormal light - emitting device and / or compensating the brightness of the remaining light - emitting devices. Thus, while improving the display effect, the repair efficiency of the electronic device after an abnormality can also be improved to further improve the display performance.

[0178] In some embodiments, after locating the position of the abnormal light-emitting device in S2, S3 and / or S4 in the above embodiments may be continued. Referring to the above embodiments, details are not described herein again.

[0179] Figure 9A 、 Figure 9B According to some embodiments of the present application, schematic structural diagrams when pixel b is abnormal are respectively shown. Among them, Figure 9A the switch T9 of each sub-pixel circuit 120b ( Figure 7 ) is in an off state, and the switch T8 is in an on state; Figure 9B in the switch T8 is in an off state, and the switch T9 is in an on state.

[0180] Table 2 below shows, according to some embodiments of the present application, Figure 9A and Figure 9B the on / off states of each light-emitting device in. Among them, "√" indicates that the light-emitting device emits light, and "×" indicates that the light-emitting device does not emit light. According to the on / off states of each light-emitting device, the abnormal light-emitting device can be determined to be the light-emitting device EL2-R.

[0181] Table 2

[0182]

[0183] Among them, the pixel point structures and the detection method of the abnormal light-emitting device shown in Table 2, Figure 9A and Figure 9B are similar to the descriptions in Table 1, Figure 8A and Figure 8B above. Reference can be made to the relevant paragraphs above, and details are not described herein again.

[0184] Figure 10A 、 Figure 10B According to some embodiments of the present application, schematic structural diagrams when pixel b is abnormal are respectively shown. Among them, Figure 10A the switch T9 of each sub-pixel circuit 120b ( Figure 7 ) is in an off state, and the switch T8 is in an on state; Figure 10B in the switch T8 is in an off state, and the switch T9 is in an on state.

[0185] Table 3 below shows, according to some embodiments of the present application, Figure 10A and Figure 10B the on / off states of each light-emitting device in. Among them, "√" indicates that the light-emitting device emits light, and "×" indicates that the light-emitting device does not emit light. According to the on / off states of each light-emitting device, the abnormal light-emitting device can be determined to be the light-emitting device EL1-G.

[0186] Table 3

[0187]

[0188] Among them, the pixel point structure shown in Table 3, Figure 10A and Figure 10B and the detection method of the abnormal light-emitting device are similar to those described in Table 1, Figure 8A and Figure 8B above. For details, please refer to the relevant paragraphs above and will not be repeated here.

[0189] Figure 11A , Figure 11B According to some embodiments of the present application, schematic diagrams of the structure when pixel point b is abnormal are respectively shown. Among them, Figure 11A the switch T9 of each sub-pixel circuit 120b ( Figure 7 ) is in the off state, and the switch T8 is in the on state; Figure 11B the switch T8 is in the off state, and the switch T9 is in the on state.

[0190] Table 4 below shows the on / off state of each light-emitting device in Figure 11A and Figure 11B according to some embodiments of the present application. Among them, "√" indicates that the light-emitting device emits light, and "×" indicates that the light-emitting device does not emit light. According to the on / off state of each light-emitting device, it can be determined that the abnormal light-emitting device is the light-emitting device EL2-G.

[0191] Table 4

[0192]

[0193] Among them, the pixel point structure shown in Table 4, Figure 11A and Figure 11B and the detection method of the abnormal light-emitting device are similar to those described in Table 1, Figure 8A and Figure 8B above. For details, please refer to the relevant paragraphs above and will not be repeated here.

[0194] Figure 12A , Figure 12B According to some embodiments of the present application, schematic diagrams of the structure when pixel point b is abnormal are respectively shown. Among them, Figure 12A the switch T9 of each sub-pixel circuit 120b ( Figure 7 ) is in the off state, and the switch T8 is in the on state; Figure 12B the switch T8 is in the off state, and the switch T9 is in the on state.

[0195] Table 5 below shows Figure 12A and Figure 12BThe on / off state of each light-emitting device. Among them, "√" indicates that the light-emitting device emits light, and "×" indicates that the light-emitting device does not emit light. According to the on / off state of each light-emitting device, the abnormal light-emitting device can be determined as the light-emitting device EL1-B.

[0196] Table 5

[0197]

[0198]

[0199] Among them, Table 5, Figure 12A and Figure 12B The pixel point structure and the detection method of the abnormal light-emitting device shown are similar to those described in the above Table 1, Figure 8A and Figure 8B The relevant paragraphs above can be referred to and will not be elaborated here.

[0200] Figure 13A 、 Figure 13B According to some embodiments of the present application, schematic structural diagrams when pixel point b is abnormal are respectively shown. Among them, Figure 13A The switch T9 of each sub-pixel circuit 120b ( Figure 7 ) is in the off state, and the switch T8 is in the on state; Figure 13B The switch T8 is in the off state, and the switch T9 is in the on state.

[0201] The following Table 6 shows, according to some embodiments of the present application, Figure 13A and Figure 13B The on / off state of each light-emitting device. Among them, "√" indicates that the light-emitting device emits light, and "×" indicates that the light-emitting device does not emit light. According to the on / off state of each light-emitting device, the abnormal light-emitting device can be determined as the light-emitting device EL2-B.

[0202] Table 6

[0203]

[0204] Among them, Table 6, Figure 13A and Figure 13B The pixel point structure and the detection method of the abnormal light-emitting device shown are similar to those described in the above Table 1, Figure 8A and Figure 8B The relevant paragraphs above can be referred to and will not be elaborated here.

[0205] In some embodiments, the present application further provides a display panel, and the display panel includes the pixel circuit as described in any one of the above embodiments.

[0206] In some embodiments, the present application further provides an electronic device, which includes a display panel, and the display panel includes the pixel circuit described in any one of the above embodiments.

[0207] For the above pixel circuit, display panel and electronic device, a plurality of parallel light-emitting units are adopted in the light-emitting module. When one of the light-emitting units is abnormal, for example, the light-emitting device is short-circuited or damaged, the normal light emission of other light-emitting devices can reduce the color deviation of the composite light displayed by the pixel, thereby improving the display effect of the display screen and enhancing the user experience. The display effect of the electronic device can be improved. Further, the pixel circuit structure provided by the present application can also facilitate the subsequent detection and repair of abnormal circuits, thereby further improving the display performance of the electronic device.

[0208] Figure 14 According to some embodiments of the present application, a schematic structural diagram of a tablet computer 10 is shown.

[0209] The above tablet computer 10 may include a processor 101, an external memory interface 102, an internal memory 103, a universal serial bus (USB) interface 130, a charging management module 140, a power management module 141, a battery 142, an antenna 1, an antenna 2, a mobile communication module 150, a wireless communication module 160, an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, a headphone interface 170D, a sensor module 180, a button 190, a motor 191, an indicator 192, a camera 193, a display screen 194, and a subscriber identification module (SIM) card interface 195, etc. The sensor module 180 may include a pressure sensor 180A, a gyroscope sensor 180B, a barometric pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity light sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, an ambient light sensor 180L, a bone conduction sensor 180M, etc.

[0210] It can be understood that the structure schematically shown in the embodiments of the present invention does not constitute a specific limitation on the tablet computer 10. In some other embodiments of the present application, the tablet computer 10 may include more or fewer components than shown in the figure, or combine certain components, or split certain components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0211] The processor 101 may include one or more processing units. For example, the processor 101 may include an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural-network processing unit (NPU), etc. Among them, different processing units may be independent devices or integrated in one or more processors.

[0212] A memory may also be provided in the processor 101 for storing instructions and data. In some embodiments, the memory in the processor 101 is a cache memory. This memory can save the instructions or data that the processor 101 has just used or recycled. If the processor 101 needs to use the instruction or data again, it can directly call it from the memory. This avoids repeated accesses, reduces the waiting time of the processor 101, and thus improves the efficiency of the system.

[0213] In some embodiments, the processor 101 may include one or more interfaces. The interfaces may include an inter-integrated circuit (I2C) interface, an inter-integrated circuit sound (I2S) interface, a pulse code modulation (PCM) interface, a universal asynchronous receiver / transmitter (UART) interface, a mobile industry processor interface (MIPI), a general-purpose input / output (GPIO) interface, a subscriber identity module (SIM) interface, and / or a universal serial bus (USB) interface, etc.

[0214] In some embodiments, the charge management module 140 is used to receive a charging input from a charger.

[0215] In some embodiments, the power management module 141 is used to connect the battery 142, the charge management module 140, and the processor 101.

[0216] In some embodiments, the wireless communication function of the tablet computer 10 can be implemented by antenna 1, antenna 2, mobile communication module 150, wireless communication module 160, modulation and demodulation processor, baseband processor, etc.

[0217] In some embodiments, antenna 1 and antenna 2 are used to transmit and receive electromagnetic wave signals. Each antenna in the tablet computer 10 can be used to cover a single or multiple communication bands. Different antennas can also be multiplexed to improve the utilization rate of the antennas. For example, antenna 1 can be multiplexed as a diversity antenna for a wireless local area network. In some other embodiments, the antenna can be used in combination with a tuning switch.

[0218] In some embodiments, the mobile communication module 150 can provide solutions for wireless communications including 2G / 3G / 4G / 5G, etc. applied to the tablet computer 10.

[0219] In some embodiments, the modulation and demodulation processor can include a modulator and a demodulator.

[0220] In some embodiments, the wireless communication module 160 can provide solutions for wireless communications including wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) networks), Bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), infrared technology (IR), etc. applied to the tablet computer 10. The wireless communication module 160 can be one or more devices integrating at least one communication processing module. The wireless communication module 160 receives electromagnetic waves via antenna 2, performs frequency modulation and filtering processing on the electromagnetic wave signals, and sends the processed signals to the processor 101. The wireless communication module 160 can also receive the signals to be transmitted from the processor 101, perform frequency modulation and amplification on them, and convert them into electromagnetic waves through antenna 2 for radiation.

[0221] In some embodiments, the antenna 1 of the tablet computer 10 is coupled to the mobile communication module 150, and the antenna 2 is coupled to the wireless communication module 160, so that the tablet computer 10 can communicate with the network and other devices through wireless communication technologies. The wireless communication technologies may include global system for mobile communications (GSM), general packet radio service (GPRS), code division multiple access (CDMA), wideband code division multiple access (WCDMA), time-division code division multiple access (TD-SCDMA), long term evolution (LTE), BT, GNSS, WLAN, NFC, FM, and / or IR technology, etc. The GNSS may include global positioning system (GPS), global navigation satellite system (GLONASS), beidou navigation satellite system (BDS), quasi-zenith satellite system (QZSS), and / or satellite based augmentation systems (SBAS).

[0222] In some embodiments, the tablet computer 10 implements the display function through the GPU, the display screen 194, and the application processor, etc.

[0223] In some embodiments, the display screen 194 is used to display images, videos, etc.

[0224] In some embodiments, the tablet computer 10 can implement the shooting function through the ISP, the camera 193, the video codec, the GPU, the display screen 194, and the application processor, etc.

[0225] In some embodiments, the camera 193 is used to capture static images or videos.

[0226] In some embodiments, the external memory interface 102 can be used to connect an external memory card, such as a Micro SD card, to implement the storage capacity expansion of the tablet computer 10.

[0227] In some embodiments, the internal memory 103 may be used to store computer-executable program code, and the executable program code includes instructions.

[0228] In some embodiments, the tablet computer 10 may implement audio functions through the audio module 170, the speaker 170A, the receiver 170B, the microphone 170C, the headphone jack 170D, and the application processor, etc. For example, music playback, recording, etc.

[0229] In some embodiments, the audio module 170 is used to convert digital audio information into an analog audio signal for output, and is also used to convert an analog audio input into a digital audio signal.

[0230] In some embodiments, the speaker 170A, also known as the "loudspeaker", is used to convert an audio electrical signal into a sound signal.

[0231] In some embodiments, the receiver 170B, also known as the "earpiece", is used to convert an audio electrical signal into a sound signal.

[0232] In some embodiments, the microphone 170C, also known as the "microphone" or "transmitter", is used to convert a sound signal into an electrical signal.

[0233] In some embodiments, the headphone jack 170D is used to connect a wired headphone.

[0234] In some embodiments, the keys 190 include a power-on key, volume keys, etc.

[0235] In some embodiments, the motor 191 may generate a vibration prompt.

[0236] In some embodiments, the indicator 192 may be an indicator light, which can be used to indicate the charging state, the change in battery level, and can also be used to indicate messages, missed calls, notifications, etc.

[0237] In some embodiments, the SIM card interface 195 is used to connect a SIM card.

[0238] It should be noted that in the examples and description of this application, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one" does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0239] Although this application has been illustrated and described by reference to certain preferred embodiments thereof, those of ordinary skill in the art should understand that various changes may be made therein in form and detail without departing from the scope of this application.

Claims

1. A pixel circuit, characterized in that: The pixel circuit includes a plurality of sub-pixel circuits, and the sub-pixel circuit includes a driving module and a light emitting module, wherein: The light emitting module comprises a plurality of light emitting units connected in parallel; The driving module is connected to the light emitting module.

2. The pixel circuit according to claim 1, characterized in that: The light emitting unit includes a light emitting diode, wherein the anode of the light emitting diode is connected to the driving module.

3. The pixel circuit according to claim 1 or 2, characterized in that: The light emitting module further comprises a switch unit; wherein the switch unit is connected in series with the light emitting unit; The first end of the switch unit is connected to the driving module, the second end is connected to the light emitting unit, and the third end receives a switch control signal.

4. The pixel circuit according to claim 3, characterized in that: The switch unit comprises a first switch transistor; Among them, one of the source and the drain of the first switch transistor is connected to the driving module, and the other is connected to the light-emitting unit, and the gate of the first switch transistor receives a switch control signal.

5. The pixel circuit according to claim 4, characterized in that: The first switch transistor includes a thin film transistor.

6. The pixel circuit according to claim 1, characterized in that: The driving module includes a first light emitting control unit, a first driving unit and a second light emitting control unit; wherein, The first end of the first light-emitting control unit is connected to the power supply voltage, the second end receives the enable light-emitting signal, and the third end is connected to the first end of the first driving unit; the first end of the second light-emitting control unit is connected to the second end of the first driving unit, the second end receives the enable light-emitting signal, and the third end is connected to the first end of the light-emitting unit.

7. The pixel circuit according to claim 6, characterized in that: The driving module further includes a first reset unit and a second reset unit; wherein, The first end of the first reset unit receives an enable reset signal, the second end is connected to the reset voltage end, and the third end is connected to the third end of the first driving unit; the first end of the second reset unit receives the enable reset signal, the second end is connected to the reset voltage end, and the third end is connected to the first end of the light-emitting unit.

8. The pixel circuit according to claim 7, characterized in that: The driving module further includes a first compensation unit, a first writing unit and a first storage unit; wherein, The first end of the first compensation unit receives an enable compensation signal, the second end is connected to the second end of the first driving unit and the first end of the second light-emitting control unit, and the third end is connected to the third end of the first driving unit and the third end of the first reset unit; the first end of the first writing unit is connected to the first end of the first driving unit and the third end of the first light-emitting control unit, the second end receives the enable compensation signal, and the third end is connected to the compensation voltage end; The first end of the first storage unit is connected to the power supply voltage, and the second end is connected to the third end of the first driving unit, the third end of the first reset unit, and the third end of the first compensation unit.

9. The pixel circuit according to claim 8, characterized in that: The first light emission control unit includes a first light emission control transistor, the first driving unit includes a first driving transistor, and the second light emission control unit includes a second light emission control transistor; The first reset unit includes a first reset transistor, and the second reset unit includes a second reset transistor; The first compensation unit includes a first compensation transistor, and the first writing unit includes a first writing transistor; The first storage unit includes a first storage capacitor.

10. A display panel, characterized in that: The method comprises a pixel circuit as claimed in any one of claims 1 to 9.

11. An electronic device, characterized in that: The invention comprises a display panel, wherein the display panel comprises the pixel circuit according to any one of claims 1 to 9.

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