Pixel driving circuit, array substrate, display device and electronic equipment

Abstract

The invention provides a pixel driving circuit, an array substrate, a display device and electronic equipment. The pixel driving circuit comprises a driving module and a write-in module, the write-in module is electrically connected with a data line and a first node. The driving module is electrically connected with the first node, a power line and a light-emitting device. The write-in module is used for writing a target level signal of the data line into the first node during a data write-in stage; and the driving module is used for outputting a driving current matched with the target level signal during a light emitting stage so as to drive the light emitting device to emit light. According to the embodiment of the invention, the driving module does not participate in the work of the data write-in stage, so that the switching device of the driving module can have enough recovery time in the reset stage and the data write-in stage, and the problem of flicker or color cast caused by voltage threshold deviation of the switching device in the driving module when high-frequency driving display is converted to low-frequency driving display is avoided; and the display quality is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of display, and in particular to a pixel driving circuit, an array substrate, a display device and an electronic device. Background Art

[0002] OLED (Organic Light-Emitting Diode) devices are current-type organic light-emitting devices. Under the action of an electric field, the holes generated by the anode of the light-emitting device and the electrons generated by the cathode will move, inject into the hole transport layer and the electron transport layer respectively, and migrate to the light-emitting layer. When the two meet in the light-emitting layer, energy excitons are generated, thereby exciting the light-emitting molecules and finally the OLED device produces visible light.

[0003] With the development of electronic devices, their display devices require ultra-high frequency drive display, low power drive display, low frequency drive display and other display modes. However, in the related art, when the display screen switches from high frequency drive display to low frequency drive display, problems such as flicker and color deviation will occur. Summary of the invention

[0004] The present disclosure provides a pixel driving circuit, an array substrate, a display device and an electronic device to solve the above technical problems.

[0005] According to a first aspect of the present disclosure, there is provided a pixel driving circuit, comprising a driving module and a writing module;

[0006] The writing module is electrically connected to the data line and the first node respectively, and the driving module is electrically connected to the first node, the power line and the light emitting device respectively;

[0007] The writing module is used to write the target level signal of the data line into the first node during the data writing phase;

[0008] The driving module is used to output a driving current matching the target level signal during a light emitting phase to drive the light emitting device to emit light.

[0009] Optionally, the writing module includes a first switching device; the first end of the first switching device is electrically connected to the data line, and the control end of the first switching device is electrically connected to the first scanning signal line; the first switching device is used to output the level signal of the data line according to the level signal output by the first scanning signal line.

[0010] Optionally, the writing module also includes a second switching device; the first end of the second switching device is electrically connected to the second end of the first switching device; the control end of the second switching device is electrically connected to the first node; the second switching device is used to transmit the level signal output by the first switching device according to the level signal of the first node.

[0011] Optionally, the writing module also includes a third switching device; the first end of the third switching device is electrically connected to the first node, and the second end of the third switching device is electrically connected to the second end of the second switching device; the control end of the third switching device is electrically connected to the second scanning signal line; the third switching device is used to write the level signal at the second end of the second switching device into the first node according to the level signal of the second scanning signal line.

[0012] Optionally, the driving module includes a fourth switch device; a control electrode of the fourth switch device is electrically connected to the first node;

[0013] The fourth switch device is used to output a driving current matching the level signal of the first node.

[0014] Optionally, the second switching device and the fourth switching device are configured to be turned on or off simultaneously according to the level signal of the first node.

[0015] Optionally, a first reset module is further included; the first reset module is electrically connected to the first level line and the first node respectively; the first reset module is used to transmit the reset level signal of the first level line to the first node during the reset phase.

[0016] Optionally, the first reset module includes a seventh switching device; the first end of the seventh switching device is electrically connected to the first level line, and the second end of the seventh switching device is electrically connected to the first node; the control end of the seventh switching device is electrically connected to the fourth scan signal line; the seventh switching device is used to write the reset level signal of the first level line into the first node according to the level signal of the fourth scan signal line.

[0017] Optionally, it further includes a second reset module; the second reset module is electrically connected to the light emitting device, the second level line and the first light emitting control module respectively; the second reset module is used to write a reset level signal to the light emitting device during the reset stage.

[0018] Optionally, the second reset module includes an eighth switching device; the first end of the eighth switching device is electrically connected to the second level line, and the second end of the eighth switching device is electrically connected to the light-emitting device and the first light-emitting control module respectively; the control end of the eighth switching device is electrically connected to the third scanning signal line; the eighth switching device is used to write the reset level signal of the second level line into the light-emitting device according to the level signal of the third scanning signal line.

[0019] Optionally, it further includes a brightness maintaining module; the brightness maintaining module is electrically connected to the power line and the first node respectively; the brightness maintaining module is used to maintain the level signal of the first node.

[0020] According to a second aspect of the present disclosure, an array substrate is provided, comprising a silicon substrate, a pixel driving circuit as described in any one of the first aspects and a corresponding light-emitting device; the pixel driving circuit is used to control the light-emitting device to emit light during a light-emitting stage.

[0021] According to a third aspect of the present disclosure, a display device is provided, comprising an array substrate, a scanning control module and a data driving module as described in the second aspect; each pixel of the array substrate is electrically connected to the data driving module through a data signal line, and each pixel of the array substrate is electrically connected to the scanning control module through a scanning signal line.

[0022] According to a fourth aspect of the present disclosure, an electronic device is provided, comprising the display device as described in the third aspect.

[0023] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0024] In this embodiment, the pixel driving circuit includes a driving module and a writing module; the writing module is electrically connected to the data line and the first node respectively, and the driving module is electrically connected to the first node, the power line and the light-emitting device respectively; the writing module is used to write the target level signal of the data line into the first node during the data writing stage; the driving module is used to output a driving current matching the target level signal during the light-emitting stage to drive the light-emitting device to emit light. In this embodiment, the writing module completes the work of the data writing stage and the driving module completes the work of the light-emitting stage, that is, the driving module no longer participates in the work of the data writing stage, so that the switch device of the driving module can have enough recovery time in the reset stage and the data writing stage, avoiding flickering or color deviation caused by the voltage threshold offset of the switch device in the driving module when the high-frequency drive display is changed to the low-frequency drive display, which is conducive to improving the display quality.

[0025] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 FIG. 4 is a schematic diagram of a pixel matrix according to an embodiment of the present disclosure.

[0027] Figure 2 The present invention is a partial circuit diagram of a pixel driving circuit provided in the related art.

[0028] Figure 3 The block diagram is a pixel driving circuit according to an embodiment of the present disclosure.

[0029] Figure 4 The figure is a circuit diagram of a pixel driving circuit according to an embodiment of the present disclosure.

[0030] Figure 5 The present invention is a timing diagram of a pixel driving circuit according to an embodiment of the present invention.

[0031] Figure 6 FIG. 4 is an equivalent circuit diagram of a pixel driving circuit in a reset stage according to an embodiment of the present disclosure.

[0032] Figure 7 FIG. 4 is an equivalent circuit diagram of a pixel driving circuit in a pixel data writing stage according to an embodiment of the present disclosure.

[0033] Figure 8 FIG. 4 is an equivalent circuit diagram of a pixel driving circuit in a light emitting stage according to an embodiment of the present disclosure.

[0034] Fig. 9 The present invention is a block diagram of an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0035] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices consistent with some aspects of the present disclosure as detailed in the appended claims.

[0036] The present disclosure provides an electronic device, which may include but is not limited to mobile phones, computers, tablets, e-books, watches, three-dimensional display screens, all-in-one conference machines, electronic whiteboards and other devices that include display devices. Figure 1 , the display device 2 includes a plurality of pixels 1, and the plurality of pixels 1 are evenly arranged in rows and columns. It can be understood that, Figure 1 Only 9 pixels 1 in 3 rows and 3 columns are illustrated, and other pixels 1 are not illustrated, so as to keep the drawings concise and clear, but it does not affect the understanding of the technical solution of the present disclosure.

[0037] See also Figure 1 Each pixel 1 includes a pixel driving circuit 100 and a light emitting device 200. The pixel driving circuit 100 is electrically connected to the light emitting device 200 to control the current flowing through the light emitting device 200 and the working time of the light emitting device 200 when displaying each frame of an image, thereby controlling the light emission. The light emitting device 200 is a current-driven light emitting diode, such as a micro light emitting diode or a mini light emitting diode (mini LED) or an organic light emitting diode OLED.

[0038] See also Figure 2 , the gate of the switching device T21 is electrically connected to the node Q, participates in the data writing operation to write the pixel data to the node Q during the data writing stage, and participates in the output drive current during the light emitting stage. When the high-frequency (such as 100-200Hz) driving display mode is switched to the low-frequency (such as 10-30Hz) driving display mode, the cycle of the switching device T21 writing data pixels changes, causing the voltage threshold of the switching device T21 to shift (Vth shift); at this time, if the same pixel data is written to the node Q, the driving current output by the switching device T21 is different, resulting in different display brightness of the display screen. For example, when the display screen switches from the high-frequency driving display mode of 120Hz to the low-frequency driving display mode of 10Hz, the brightness of the display screen will dim briefly after the high-low switching, causing the user to see flickering.

[0039] In one embodiment, see Figure 3 , the pixel driving circuit 100 includes a writing module 10 and a driving module 20. The writing module 10 is electrically connected to the data line Data and the first node P1 respectively, and the driving module 20 is electrically connected to the first node P1, the power line VDD and the light emitting device 200 respectively;

[0040] The writing module 10 is used to write the target level signal of the data line Data into the first node P1 during the data writing phase. The driving module 20 is used to output a driving current matching the target level signal during the light emitting phase to drive the light emitting device 200 to emit light.

[0041] Compared with the related art in which the driving device of the driving module participates in the data writing stage and the light-emitting display stage, in this embodiment, the writing module completes the work in the data writing stage and the driving module completes the work in the light-emitting stage, that is, the driving module no longer participates in the work in the data writing stage, so that the switching device of the driving module has sufficient recovery time in the reset stage and the data writing stage, avoiding flickering or color deviation caused by the voltage threshold offset of the switching device in the driving module when the high-frequency driving display is converted to the low-frequency driving display, which is beneficial to improving the display quality.

[0042] In one example, the writing module 10 includes a first switch device T1. A first end of the first switch device T1 is electrically connected to the data line Data, and a control end of the first switch device T1 is electrically connected to the first scanning signal line S1; the first switch device is used to output a level signal of the data line Data according to a level signal output by the first scanning signal line S1.

[0043] In a possible example, the second end of the first switch device T1 is electrically connected to the first node P1, so that the target level signal of the data line Data is written into the first node P1, thereby achieving the effect of controlling the driving module 20. Considering that there is no level loss when the target level signal is directly written into the first node P1, voltage threshold compensation is not required at this time.

[0044] In a possible example, the writing module 10 further includes a second switch device T2, a first end of the second switch device T2 being electrically connected to a second end of the first switch device T1; a control end of the second switch device T2 being electrically connected to a first node P1; and the second switch device T2 being used to transmit a level signal output by the first switch device T1 according to a level signal of the first node P1. In a possible example, a second end of the second switch device T2 is electrically connected to the first node P1, so that a target level signal of the data line Data is written into the first node P1, thereby achieving the effect of controlling the driving module 20. In this way, considering that the second switch device T2 has a switching threshold voltage, the target level signal needs to be compensated for the voltage threshold at this time. Therefore, in this example, the voltage threshold of the subsequent fourth switch device T4 when displaying the previous frame of the image is combined with the pixel data of the current image to obtain the above-mentioned target level signal, that is, the target level signal is a level signal after voltage threshold compensation.

[0045] Considering that when the target level signal is directly written to the first node P1, the leakage current of the first switching device T1 and the second switching device T2 will be written to the first node P1, causing the potential of the first node P1 to change, thereby affecting the brightness of the light-emitting device 200, in another example, the writing module 10 also includes a third switching device T3; the first end of the third switching device T3 is electrically connected to the first node P1, and the second end of the third switching device T3 is electrically connected to the second end of the second switching device T2; the control end of the third switching device T3 is electrically connected to the second scan signal line S2; the third switching device T3 is used to write the level signal at the second end of the second switching device T2 into the first node P1 according to the level signal of the second scan signal line S2.

[0046] Take the writing module including the first switch device T1, the second switch device T2 and the third switch device T3 as an example, see Figure 4The working principle of the writing module 10 is as follows: in the data writing stage, the first switch device T1, the second switch device T2 and the third switch device T3 are all turned on, and the level signal of the data line Data can be written into the first node P1. It can be understood that the second switch device T4 participates in the data writing stage, and its voltage threshold can be compensated to the pixel data, and is in a disconnected state in the reset stage, and its voltage threshold has enough time to recover, thereby ensuring the normal display of the light emitting device 200.

[0047] In this embodiment, the driving module 20 includes a fourth switch device T4. The control electrode of the fourth switch device T4 is electrically connected to the first node P1; the fourth switch device is used to output a driving current matching the level signal of the first node P1 during the light-emitting stage, so that the light-emitting device 200 displays a corresponding brightness. In other words, the control end of the driving module 20 outputs the driving current based on the level signal output by the writing module 10, so as to achieve the purpose of controlling the light-emitting device 200 to emit light.

[0048] It should be noted that the second switch device T2 and the fourth switch device T4 are implemented by the same type of switch device, and are turned on or off at the same time according to the level signal of the first node P1. In an example, the second switch device T2 and the fourth switch device T4 are implemented by switch devices of the same production batch or two completely identical switch devices, so as to ensure that the voltage thresholds of the two are the same or similar, so as to ensure the accuracy of voltage compensation.

[0049] Continue to see Figure 3 The pixel driving circuit provided in this embodiment further includes a first light emitting control module 30. The first light emitting control module 30 is electrically connected to the driving module 20 and the light emitting device 200, respectively, and is used to turn on the driving module 20 and the light emitting device 200 in the light emitting stage, so that the driving current output by the driving module 20 drives the light emitting device 200 to emit light.

[0050] In one example, the first light-emitting control module 30 includes a fifth switch device T5; a first end of the fifth switch device T5 is electrically connected to the driving module 20, a second end of the fifth switch device T5 is electrically connected to the light-emitting device 200, and a control end of the fifth switch device T5 is electrically connected to the light-emitting control line EM; the fifth switch device T5 is used to transmit the driving current of the driving module 20 to the light-emitting device 200 according to the level signal of the light-emitting control line EM. In this way, in this example, the fifth switch device T5 can transmit the driving current output by the fourth switch device T4 to the light-emitting device 200 when it is turned on, so that the light-emitting device 200 emits light.

[0051] Continue to see Figure 3The pixel driving circuit provided in this embodiment further includes a second light emitting control module 40. The second light emitting control module 40 is electrically connected to the power line VDD and the driving module 20 respectively, and is used to transmit the level signal of the power line VDD to the driving module 20 in the light emitting stage.

[0052] In one example, the second light-emitting control module 40 includes a sixth switch device T6; a first end of the sixth switch device is electrically connected to the power line VDD, a second end of the sixth switch device T6 is electrically connected to the driving module 20, and a control end of the sixth switch device T6 is electrically connected to the light-emitting control line EM; the sixth switch device T6 is used to transmit the level signal of the power line VDD to the driving module 20 according to the level signal of the light-emitting control line EM. In this way, in this example, the sixth switch device T6 can output the level signal of the power line VDD to the driving module 20 when it is turned on, so that the driving module 20 outputs the driving current.

[0053] Continue to see Figure 3 The pixel driving circuit provided in this embodiment further includes a first reset module 50. The first reset module 50 is electrically connected to the first level line VI1 and the first node P1 respectively, and the first reset module 50 is used to transmit the reset level signal (e.g., -2 to -5V, adjustable) of the first level line VI1 to the first node P1 during the reset phase.

[0054] Continue to see Figure 4 The first reset module 50 includes a seventh switch device T7; a first end of the seventh switch device T7 is electrically connected to the first level line VI1, and a second end of the seventh switch device T7 is electrically connected to the first node P1; a control end of the seventh switch device T7 is electrically connected to the fourth scan signal line S4; the seventh switch device T7 is used to write the reset level signal of the first level line VI1 into the first node P1 according to the level signal of the fourth scan signal line S4.

[0055] In this way, in this embodiment, the first node P1 can be reset by the first resetting module 50, so as to ensure that the driving module 20 is in a closed state, and avoid outputting a driving current to cause the light emitting device 200 to emit light by mistake.

[0056] Continue to see Figure 3 The pixel driving circuit provided in this embodiment further includes a second reset module 60. The first reset module 60 is electrically connected to the light emitting device 200, the second level line VI2 and the first light emitting control module 30 respectively; the second reset module is used to transmit the reset level signal (e.g., -2 to -5V, adjustable) of the second level line VI2 to the light emitting device during the reset stage.

[0057] Continue to see Figure 4The second reset module 60 includes an eighth switch device T8; a first end of the eighth switch device T8 is electrically connected to the second level line VI2, and a second end of the eighth switch device T8 is electrically connected to the light emitting device 200 and the first light emitting control module 30 respectively; a control end of the eighth switch device T8 is electrically connected to the third scanning signal line S3; the eighth switch device T8 is used to write the reset level signal of the second level line VI2 into the light emitting device 200 according to the level signal of the third scanning signal line S3.

[0058] In this way, in this embodiment, the light emitting device 200 can be reset by the second resetting module 60, thereby ensuring that the light emitting device 200 is in an extinguished state to avoid false light emission.

[0059] Continue to see Figure 3 The pixel driving circuit provided in this embodiment further includes a brightness maintaining module 70. The brightness maintaining module 70 is electrically connected to the power line VDD and the first node P1 respectively; the brightness maintaining module 70 is used to maintain the level signal of the first node P1.

[0060] Continue to see Figure 4 The brightness maintaining module 70 includes a storage capacitor Cst. The storage capacitor Cst is electrically connected to the power line VDD and the first node P1, respectively, and is used to maintain the level signal of the first node P1, so as to provide a stable driving voltage for the driving module 20, for example, to ensure that the driving module 20 is in a closed state during the reset phase and to ensure that the driving module 20 is in a conducting state during the data writing phase and the light emitting phase.

[0061] It should be noted that, in this embodiment, the first node P1 is a fictitious node for describing the solution, which may be a connecting line, an intersection of connecting line points, etc.

[0062] It should be noted that Figure 4 The switch device shown can be implemented by an N-type transistor (such as an N-type MOS tube) or a P-type transistor (such as a P-type MOS tube). Taking an N-type transistor as an example, its control signal provides a high-level signal; taking a P-type transistor as an example, its control signal provides a low-level signal. It can be understood that in some possible embodiments, the switch devices of each module in the pixel driving circuit can partially use N-type transistors and partially use P-type transistors. For an N-type transistor, its input end is a drain and its output end is a source, and its control end is a gate; for a P-type transistor, its input end is a source and its output end is a drain, and its control end is a gate.

[0063] For the convenience of description, Figure 4 The third switch device T3 and the seventh switch device T7 are implemented by using N-type oxide IGZO transistors, and the other switch devices are implemented by using P-type LTPS transistors. Figure 5As shown in the timing sequence, the working process of the pixel driving circuit 100 includes:

[0064] (1) Reset phase

[0065] The light emitting control line EM, the first scan line S1 and the fourth scan line N scan2 provide high level signals, and the third scan line S1 and the second scan line N scan1 provide low level signals. At this time, the seventh switch device T7 and the eighth switch device T8 are turned on, and the first switch device T1, the second switch device T2, the third switch device T3, the fourth switch device T4, the fifth switch device T5 and the sixth switch device T6 are turned off. Figure 4 The pixel driving circuit shown becomes Figure 6 The equivalent circuit is shown.

[0066] See also Figure 6 When the seventh switch device T7 is turned on, the reset level signal of the first level line VI1 can be written to the first node P1, so as to reset the fourth switch device T4 in the driving module, clear the pixel data in the previous frame image, and ensure that the fourth switch device T4 does not output the driving current. When the eighth switch device T8 is turned on, the reset level signal of the second level line VI2 can be written to the anode of the light emitting device 200 to ensure that the light emitting device 200 does not emit light.

[0067] (2) Data writing phase

[0068] The light emitting control line EM, the third scan line S3 and the second scan line N scan1 provide high level signals, and the first scan line S1 and the fourth scan line N scan2 provide low level signals. At this time, the first switch device T1, the second switch device T2 and the third switch device T3 are turned on, and the fourth switch device T4, the fifth switch device T5, the sixth switch device T6, the seventh switch device T7 and the eighth switch device T8 are turned off. Figure 4 The pixel driving circuit shown becomes Figure 7 The equivalent circuit is shown.

[0069] See also Figure 7 When the first switching device T1, the second switching device T2 and the third switching device T3 are turned on, the target level signal Vdata of the data line Data is written to the first node P1 and maintained by the storage capacitor Cst. At this time, the fourth switching device T4 is turned on.

[0070] (3) Lighting stage

[0071] The first scan line S1 and the third scan line N scan2 provide high level signals, and the light emitting control line EM, the second scan line N scan1 and the fourth scan line N scan2 provide low level signals. At this time, the second switch device T2, the fourth switch device T4, the fifth switch device T5 and the sixth switch device T6 are turned on, while the first switch device T1, the third switch device T3, the seventh switch device T7 and the eighth switch device T8 are turned off. Figure 3 The pixel driving circuit shown becomes Figure 8 The equivalent circuit is shown.

[0072] At this time, the current provided by the power line VDD passes through the sixth switch device T6, the fourth switch device T4 and the fifth switch device T5 in sequence, flows through the light-emitting device 200, and finally flows to the ground VSS. At this time, the light-emitting device 200 emits light, and its intensity matches the target level signal at the first node P1.

[0073] In some possible embodiments, an array substrate is also provided, including a silicon substrate, such as Figure 3 and Figure 4 The illustrated pixel driving circuit and its corresponding light-emitting device; the pixel driving circuit is used to control the light-emitting device to emit light during a light-emitting phase.

[0074] In some possible embodiments, a display device is also provided, including the above-mentioned array substrate, scanning control module and data driving module; each pixel of the array substrate is electrically connected to the data driving module through a data signal line, and each pixel of the array substrate is electrically connected to the scanning control module through a scanning signal line.

[0075] Fig. 9 9 is a block diagram of an electronic device according to an exemplary embodiment. For example, the electronic device 900 may be a smart phone, a computer, a digital broadcast terminal, a tablet device, a medical device, a fitness device, a personal digital assistant, etc., as well as the above-mentioned vehicle equipment, etc. The electronic device includes the above-mentioned display device.

[0076] Reference Fig. 9 The electronic device 900 may include one or more of the following components: a processing component 902 , a memory 904 , a power component 906 , a multimedia component 908 , an audio component 910 , an input / output (I / O) interface 912 , a sensor component 914 , a communication component 916 , and an image acquisition component 918 .

[0077] The processing component 902 generally controls the overall operation of the electronic device 900, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 902 may include one or more processors 920 to execute computer programs. In addition, the processing component 902 may include one or more modules to facilitate interaction between the processing component 902 and other components. For example, the processing component 902 may include a multimedia module to facilitate interaction between the multimedia component 908 and the processing component 902.

[0078] The memory 904 is configured to store various types of data to support operations on the electronic device 900. Examples of such data include computer programs for any application or method operating on the electronic device 900, contact data, phone book data, messages, pictures, videos, etc. The memory 904 may be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0079] The power supply component 906 provides power to various components of the electronic device 900. The power supply component 906 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the electronic device 900. The power supply component 906 may include a power supply chip, and the controller may communicate with the power supply chip to control the power supply chip to turn on or off a switch device, so that the battery supplies power to the mainboard circuit or not.

[0080] The multimedia component 908 includes a screen that provides an output interface between the electronic device 900 and the target object. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input information from the target object. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor can not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In one example, the screen includes the above-mentioned display device implementation.

[0081] The audio component 910 is configured to output and / or input audio file information. For example, the audio component 910 includes a microphone (MIC), and when the electronic device 900 is in an operation mode, such as a call mode, a recording mode, and a voice recognition mode, the microphone is configured to receive external audio file information. The received audio file information can be further stored in the memory 904 or sent via the communication component 916. In some embodiments, the audio component 910 also includes a speaker for outputting audio file information.

[0082] The I / O interface 912 provides an interface between the processing component 902 and a peripheral interface module, which may be a keyboard, a click wheel, a button, etc.

[0083] The sensor component 914 includes one or more sensors for providing various aspects of status assessment for the electronic device 900. For example, the sensor component 914 can detect the open / closed state of the electronic device 900, the relative positioning of components, such as the display screen and keypad of the electronic device 900, and the sensor component 914 can also detect the position change of the electronic device 900 or a component, the presence or absence of contact between the target object and the electronic device 900, the orientation or acceleration / deceleration of the electronic device 900, and the temperature change of the electronic device 900. In this example, the sensor component 914 may include a magnetic sensor, a gyroscope, and a magnetic field sensor, wherein the magnetic field sensor includes at least one of the following: a Hall sensor, a thin film magnetoresistive sensor, and a magnetic liquid acceleration sensor.

[0084] The communication component 916 is configured to facilitate wired or wireless communication between the electronic device 900 and other devices. The electronic device 900 can access a wireless network based on a communication standard, such as WiFi, 2G, 3G, 4G, 5G, or a combination thereof. In an exemplary embodiment, the communication component 916 receives broadcast information or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 916 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0085] In an exemplary embodiment, the electronic device 900 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components.

[0086] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the disclosure disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are to be considered exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0087] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

[0088] The terms used in this disclosure are only for the purpose of describing specific embodiments and are not intended to limit the disclosure. Unless otherwise defined, the technical terms or scientific terms used in this disclosure should be understood by people with ordinary skills in the field to which the disclosure belongs. Similar words such as "one" or "one" used in this disclosure specification and claims do not indicate a quantitative limitation, but indicate that there is at least one. "Multiple" means at least two. Similar words such as "include" or "include" mean that the elements or objects appearing in front of "include" or "include" include the elements or objects listed after "include" or "include" and their equivalents, and do not exclude other elements or objects. Similar words such as "connect" or "connected" are not limited to physical or mechanical connections, and can include electrical connections, whether direct or indirect. The singular forms of "one", "said" and "the" used in this disclosure specification and the attached claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0089] As for the method embodiment, since it basically corresponds to the device embodiment, the relevant parts can be referred to the partial description of the device embodiment. The method embodiment and the device embodiment complement each other.

[0090] The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the scope of protection of the present disclosure.

Claims

1. A pixel driving circuit, characterized in that: Including a driving module and a writing module; The writing module is electrically connected to the data line and the first node respectively, and the driving module is electrically connected to the first node, the power line and the light emitting device respectively; The writing module is used to write the target level signal of the data line into the first node during the data writing phase; The driving module is used to output a driving current matching the target level signal during a light emitting phase to drive the light emitting device to emit light.

2. The pixel driving circuit according to claim 1, characterized in that: The writing module includes a first switching device; the first end of the first switching device is electrically connected to the data line, and the control end of the first switching device is electrically connected to the first scanning signal line; the first switching device is used to output the level signal of the data line according to the level signal output by the first scanning signal line.

3. The pixel driving circuit according to claim 2, characterized in that: The writing module also includes a second switching device; the first end of the second switching device is electrically connected to the second end of the first switching device; the control end of the second switching device is electrically connected to the first node; the second switching device is used to transmit the level signal output by the first switching device according to the level signal of the first node.

4. The pixel driving circuit according to claim 3, characterized in that: The writing module also includes a third switching device; the first end of the third switching device is electrically connected to the first node, and the second end of the third switching device is electrically connected to the second end of the second switching device; the control end of the third switching device is electrically connected to the second scanning signal line; the third switching device is used to write the level signal at the second end of the second switching device into the first node according to the level signal of the second scanning signal line.

5. The pixel driving circuit according to claim 1, characterized in that: The driving module includes a fourth switch device; the control electrode of the fourth switch device is electrically connected to the first node; The fourth switch device is used to output a driving current matching the level signal of the first node.

6. The pixel driving circuit according to claim 3 or 5, characterized in that: The second switching device and the fourth switching device are used to be turned on or off simultaneously according to the level signal of the first node.

7. The pixel driving circuit according to claim 1, characterized in that: It also includes a first reset module; the first reset module is electrically connected to the first level line and the first node respectively; the first reset module is used to transmit the reset level signal of the first level line to the first node during the reset phase.

8. The pixel driving circuit according to claim 7, characterized in that: The first reset module includes a seventh switch device; a first end of the seventh switch device is electrically connected to the first level line, and a second end of the seventh switch device is electrically connected to the first node; a control end of the seventh switch device is electrically connected to the fourth scan signal line; the seventh switch device is used to write a reset level signal of the first level line into the first node according to the level signal of the fourth scan signal line.

9. The pixel driving circuit according to claim 1, characterized in that: It also includes a second reset module; the second reset module is electrically connected to the light emitting device, the second level line and the first light emitting control module respectively; the second reset module is used to write a reset level signal to the light emitting device during the reset stage.

10. The pixel driving circuit according to claim 9, characterized in that: The second reset module includes an eighth switch device; a first end of the eighth switch device is electrically connected to the second level line, and a second end of the eighth switch device is electrically connected to the light-emitting device and the first light-emitting control module respectively; a control end of the eighth switch device is electrically connected to the third scan signal line; the eighth switch device is used to write the reset level signal of the second level line into the light-emitting device according to the level signal of the third scan signal line.

11. The pixel driving circuit according to claim 1, characterized in that: It also includes a brightness maintaining module; the brightness maintaining module is electrically connected to the power line and the first node respectively; the brightness maintaining module is used to maintain the level signal of the first node.

12. An array substrate, characterized in that: It comprises a silicon substrate, a pixel driving circuit as claimed in any one of claims 1 to 11 and a corresponding light-emitting device; the pixel driving circuit is used to control the light-emitting device to emit light during a light-emitting phase.

13. A display device, characterized in that: It includes the array substrate, scanning control module and data driving module as described in claim 12; each pixel of the array substrate is electrically connected to the data driving module through a data signal line, and each pixel of the array substrate is electrically connected to the scanning control module through a scanning signal line.

14. An electronic device, characterized in that: Includes the display device as claimed in claim 13.

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