Silicon-based display panel

Abstract

The invention discloses a silicon-based display panel. A driving transistor and a light-emitting element in the silicon-based display panel are connected in series between a first power signal end and a second power signal end to form a series branch, an energy storage module and the light-emitting element are arranged in parallel, and the driving transistor is used for driving the light-emitting element to emit light. The switch module is arranged on a connecting node of the series branch, a frame of display picture of the silicon-based display panel comprises a plurality of sub-fields, in at least part of the sub-fields, the driving transistor is switched on when the pixel driving circuit performs data writing, and the switch module is used for being switched off when the pixel driving circuit performs data writing. And conducting after the data writing of the current sub-field is completed. Therefore, after the data writing of the current subfield is completed, the switch module is controlled to be conducted so as to enable the light-emitting element to emit light, and by adjusting the voltage pulse width of the switch module, the opening time of the pixel driving circuit can be accurately controlled, the brightness of the silicon-based display panel can be reduced, and the low gray scale can reach the theoretical brightness more easily.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a silicon-based display panel. Background Technology

[0002] With the explosive growth of near-eye display applications such as AR / VR devices and smart glasses in recent years, silicon-based microdisplays, as core components, have ushered in unprecedented development opportunities due to their unique performance advantages. Currently, the development of silicon-based microdisplay technology exhibits core trends of high resolution, high brightness, low power consumption, and miniaturization. Although silicon-based microdisplays have significant advantages in miniaturization and low power consumption, many technical bottlenecks still exist in grayscale performance. Among these, achieving high-quality full grayscale display is one of the core challenges in the research and development of silicon-based microdisplays.

[0003] In the equivalent circuit of a silicon-based microdisplay pixel, due to the presence of capacitors, there is an overshoot phenomenon in the current during the opening process. That is, at the moment the circuit switch is turned on and off, there is a large instantaneous current, which takes a period of time to reach the expected current value. During this period, the brightness produced by the silicon-based microdisplay is much greater than the ideal brightness, resulting in uneven grayscale transition and insufficient fineness in low grayscale display. Summary of the Invention

[0004] This invention provides a silicon-based display panel. After the data in the current subfield is written, the control switch module is turned on to make the light-emitting element emit light. By adjusting the voltage pulse width of the switch module, the turn-on time of the pixel driving circuit can be precisely controlled, thereby reducing the brightness of the silicon-based display panel and making it easier to achieve the theoretical brightness at low gray levels.

[0005] In a first aspect, embodiments of the present invention provide a silicon-based display panel, the silicon-based display panel including a plurality of pixel driving circuits, a plurality of light-emitting elements, and at least one switching module; The pixel driving circuit includes a driving module and an energy storage module; The driving module includes a driving transistor, and the driving transistor and the light-emitting element are connected in series between the first power signal terminal and the second power signal terminal to form a series branch. The energy storage module is connected in parallel with the light-emitting element. The switching module is disposed on the connection node of the series branch, and the light-emitting element emits light when the driving transistor and the switching module are both turned on. A frame of the silicon-based display panel includes multiple subfields. In at least some subfields, the driving transistor is turned on when the pixel driving circuit is writing data, and the switching module is used to turn off when the pixel driving circuit is writing data and turn on after the data writing of the current subfield is completed.

[0006] Optionally, the silicon-based display panel includes multiple rows of pixel driving circuit groups, and each row of pixel driving circuit groups includes multiple pixel driving circuits; The first terminal of the driving transistor in all pixel driving circuits is connected to the first connection node, and the switching module is connected in series between the first connection node and the first power signal terminal. The first power signal terminal outputs a positive power signal.

[0007] Optionally, the silicon-based display panel includes multiple rows of pixel driving circuit groups, and each row of pixel driving circuit groups includes multiple pixel driving circuits; The second terminal of the driving transistor in all pixel driving circuits is connected to the second connection node, and the switching module is connected in series between the second connection node and the second power signal terminal. The second power signal terminal outputs a negative power signal.

[0008] Optionally, the silicon-based display panel includes a plurality of switching modules, each of which includes a switching transistor; The switch module is configured correspondingly to the pixel driving circuit, and the switch module is located close to the driving transistor.

[0009] Optionally, the first terminal of the switching transistor is electrically connected to the first power supply signal terminal, the second terminal of the switching transistor is electrically connected to the first terminal of the driving transistor in the corresponding pixel driving circuit, and the gate of the switching transistor is electrically connected to the first clock signal terminal.

[0010] Optionally, the energy storage module includes a first capacitor, the first plate of the first capacitor is connected to the first electrode of the light-emitting element at a third connection node, and the second plate of the first capacitor is electrically connected to the second electrode of the light-emitting element and the second power signal terminal, respectively. The first terminal of the switching transistor is electrically connected to the second terminal of the driving transistor, the second terminal of the switching transistor is electrically connected to the third connection node, and the gate of the switching transistor is electrically connected to the first clock signal terminal.

[0011] Optionally, in at least some subfields, the driving transistor is turned on when the pixel driving circuit is writing data, and the switching transistor is turned off when the pixel driving circuit is writing data, and briefly turned on after the data writing of the current subfield is completed, so that the operating state of the switching transistor is in the subthreshold region.

[0012] Optionally, the multiple subfields include multiple clearing subfields and multiple unclearing subfields; The silicon-based display panel includes multiple rows of pixel driving circuit groups, and each row of pixel driving circuit groups includes multiple pixel driving circuits. The driving module of the silicon-based display panel includes a first driving mode and a second driving mode; In the first driving mode, the driving transistor is turned on when the pixel driving circuit performs data writing, and the switching module is used to turn off when the pixel driving circuit performs data writing and turn on after the data writing of the current subfield is completed. In the second driving mode, both the driving transistor and the switching module are turned on when the pixel driving circuit is writing data, and the data of the current row pixel driving circuit group is cleared after the data writing of the current row pixel driving circuit group is completed and the display is completed. The first driving mode is used in the unclear subfield, and the second driving mode is used in the clear subfield.

[0013] Optionally, a single frame of display from the plurality of silicon-based display panels may further include a first stage and a second stage; The first stage includes multiple clearing subfields and multiple unclearing subfields, which are alternately arranged; the second stage includes multiple clearing subfields.

[0014] The silicon-based display panel provided in this embodiment of the invention includes multiple pixel driving circuits, multiple light-emitting elements, and at least one switching module. The pixel driving circuit includes a driving module and an energy storage module. The driving module includes a driving transistor, which is connected in series with the light-emitting element between a first power signal terminal and a second power signal terminal to form a series branch. The energy storage module is connected in parallel with the light-emitting element, and the driving transistor drives the light-emitting element to emit light. The switching module is disposed at the connection node of the series branch. A frame of the silicon-based display panel includes multiple subfields. In at least some subfields, the driving transistor is turned on when the pixel driving circuit performs data writing, and the switching module is turned off when the pixel driving circuit performs data writing and turned on after the data writing of the current subfield is completed. This solution introduces a switching module based on the original pixel driving circuit, and the switching module is disposed in the series branch. The switching module independently controls the turn-on time of the pixel driving circuit, thereby affecting the current magnitude of the light-emitting element and reducing the brightness of the silicon-based display panel. In at least some subfields, the driving transistor is turned on when the pixel driving circuit is writing data, and the switching module is turned off when the pixel driving circuit is writing data. At this time, the silicon-based display panel is in a black screen state. After the data writing of the current subfield is completed, the control switching module is turned on to control the light-emitting element to emit light. By adjusting the voltage pulse width of the switching module, the light-emitting duration of the light-emitting element can be reduced, thereby reducing the light-emitting brightness of the light-emitting element. This makes it easier for low grayscale to reach the theoretical brightness, solves the problem of low grayscale brightness jump caused by current overshoot when the driving transistor of the pixel driving circuit is switched, and improves the uniformity of grayscale transition. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a silicon-based display panel provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of another silicon-based display panel provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of another silicon-based display panel provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of another silicon-based display panel provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of a scanning process provided in an embodiment of the present invention; Figure 6 This is a grayscale display brightness comparison diagram provided in an embodiment of the present invention. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be fully described below with reference to the accompanying drawings in the embodiments of this invention, through specific implementation methods. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort fall within the protection scope of this invention.

[0017] Figure 1 This is a schematic diagram of the structure of a silicon-based display panel provided in an embodiment of the present invention. See also... Figure 1 The silicon-based display panel includes multiple pixel driving circuits 10, multiple light-emitting elements 20, and at least one switching module 30. The pixel driving circuit 10 includes a driving module 110 and an energy storage module 120. The driving module 110 includes a driving transistor M1, which is connected in series with the light-emitting element 20 between a first power signal terminal VOLED and a second power signal terminal VCOM to form a series branch. The energy storage module 120 is connected in parallel with the light-emitting element 20. The switching module 30 is disposed at the connection node of the series branch. When both the driving transistor M1 and the switching module 30 are turned on, the light-emitting element 20 emits light. A frame of the silicon-based display panel includes multiple subfields. In at least some subfields, the driving transistor T1 is turned on when the pixel driving circuit 10 performs data writing, and the switching module 30 is turned off when the pixel driving circuit 10 performs data writing and turned on after the data writing of the current subfield is completed.

[0018] For example, such as Figure 1In the illustrated embodiment, the silicon-based display panel includes multiple pixel driving circuits 10 and multiple light-emitting elements 20. The multiple pixel driving circuits 10 are electrically connected to corresponding light-emitting elements 20. Furthermore, the multiple pixel driving circuits 10 are arranged in an array to form multiple rows of pixel driving circuit groups, and the multiple light-emitting elements 20 are similarly arranged in an array to form multiple rows of light-emitting element groups. Each row of pixel driving circuit groups provides control signals to the corresponding row of light-emitting element groups. Each pixel driving circuit 10 includes a driving module 110 and an energy storage module 120. The driving module 110 includes a driving transistor M1, and the energy storage module 120 includes a first capacitor C. The first electrode of the driving transistor M1 is electrically connected to a first power signal terminal VOLED, and the second electrode of the driving transistor M2 is electrically connected to both the first plate of the first capacitor C and the first electrode of the light-emitting element 20. The second electrode of the light-emitting element 20 and the second plate of the first capacitor C are both electrically connected to a second power signal terminal VCOM. The driving transistor M1 and the light-emitting element 20 are connected in series between the first power signal terminal VOLED and the second power signal terminal VCOM to form a series branch. The energy storage module 120 is connected in parallel with the light-emitting element 20. The gate of the driving transistor M1 receives a control signal, thereby controlling the light-emitting duration of the light-emitting element 20, and thus controlling the light-emitting brightness of the light-emitting element 20. For example, the longer the light-emitting time of the light-emitting element 20, the greater the light-emitting brightness of the light-emitting element 20.

[0019] However, due to the presence of the first capacitor C, an overshoot phenomenon occurs during the opening of the driving transistor M1. That is, a large instantaneous current occurs at the moment the driving transistor M1 turns on and off, and it takes some time to reach the desired current value. During this time, the brightness produced by the light-emitting element 20 is much greater than the ideal brightness. Furthermore, existing driving modes are typically line-by-line scanning, meaning that for displaying one frame of a silicon-based display panel, data is written and cleared line by line for each pixel driving circuit group. Grayscale adjustment is performed with a time precision of one pixel driving circuit group, resulting in low brightness adjustment accuracy. Combined with the overshoot phenomenon of the driving transistor M1, the brightness value of the low grayscale levels of the silicon-based display panel is higher than the calculated theoretical brightness value, resulting in uneven grayscale transitions and insufficient detail in low grayscale display.

[0020] To this end, this embodiment of the invention provides at least one switch module 30, which is disposed at the connection node of the series branch and works in conjunction with the driving transistor M1 to control the brightness of the light-emitting element 20. Specifically, the switch module 30 is connected in series at the connection node of the series branch. When both the switch module 30 and the driving transistor M1 are turned on, the light-emitting element 20 can emit light for display. When at least one of the switch module 30 or the driving transistor M1 is turned off, the light-emitting element 20 does not emit light for display. Based on this, the on-time of the switch module 30 can be independently controlled to affect the light-emitting time of the light-emitting element, thereby reducing the brightness of the light-emitting element. Specifically, in data-driven technology, a frame of a silicon-based display panel is typically divided into multiple subfields with different brightness levels for display. Each subfield contains a binary image of a frame (containing only "on" or "off" states, i.e., bright or dark), and the duration of each subfield is independent of each other. By superimposing all the subfields, a complete frame of image can be formed. In this embodiment of the invention, in at least some subfields, the driving transistor M1 is turned on when the pixel driving circuit 10 is writing data, and the switching module 30 is turned off when the pixel driving circuit 10 is writing data. It is understood that the silicon-based display panel includes multiple rows of pixel driving circuit groups, which write data row by row. During the row-by-row data writing, the driving transistor M1 in each pixel driving circuit 10 remains on. At this time, the switching module 30 is off, therefore, the silicon-based display panel is in a black screen state. After all data in the current subfield is written, that is, after all data in each row of pixel driving circuit groups in the current subfield has been written (during this process, no data clearing is performed after each row of data is written), the control switching module 30 is turned on, the series branches form a path, and the silicon-based display panel displays. Furthermore, by controlling the voltage pulse width (i.e., conduction time) of the gate of the switching module 30, the light emission duration of the light-emitting element 20 can be controlled as a whole, thereby reducing the display brightness of the silicon-based display panel. This makes it easier to achieve the theoretical brightness at low gray levels, solves the problem of low gray level brightness jump caused by current overshoot when the driving transistor of the pixel driving circuit is switched, improves the uniformity of gray level transition, and improves the display effect of the silicon-based display panel.

[0021] It should be noted that the silicon-based display panel may include a first driving mode. In the first driving mode, the driving transistor T1 is turned on when the pixel driving circuit 10 performs data writing, and the switching module 30 is turned off when the pixel driving circuit 10 performs data writing and turned on after the data writing of the current subfield is completed. The above embodiment exemplifies the use of the driving module of some subfields as the first driving mode, but the embodiments of the present invention are not limited to this. In other embodiments, all subfields may be configured to use the first driving mode, and those skilled in the art can configure it as needed.

[0022] In summary, the silicon-based display panel provided in this embodiment of the invention includes multiple pixel driving circuits, multiple light-emitting elements, and at least one switching module. The pixel driving circuit includes a driving module and an energy storage module. The driving module includes a driving transistor, which is connected in series with the light-emitting element between a first power signal terminal and a second power signal terminal to form a series branch. The energy storage module is connected in parallel with the light-emitting element, and the driving transistor is used to drive the light-emitting element to emit light. The switching module is disposed at the connection node of the series branch. A frame of the silicon-based display panel includes multiple subfields. In at least some subfields, the driving transistor is turned on when the pixel driving circuit performs data writing, and the switching module is used to turn off when the pixel driving circuit performs data writing and turn on after the data writing of the current subfield is completed. This solution introduces a switching module based on the original pixel driving circuit, and the switching module is disposed in the series branch. The switching module independently controls the turn-on time of the pixel driving circuit, thereby affecting the current magnitude of the light-emitting element and reducing the brightness of the silicon-based display panel. In at least some subfields, the driving transistor is turned on when the pixel driving circuit is writing data, and the switching module is turned off when the pixel driving circuit is writing data. At this time, the silicon-based display panel is in a black screen state. After the data writing of the current subfield is completed, the control switching module is turned on to control the light-emitting element to emit light. By adjusting the on-time of the switching module, the light-emitting duration of the light-emitting element can be reduced, thereby reducing the light-emitting brightness of the light-emitting element. This makes it easier for low grayscale to reach the theoretical brightness, solves the problem of low grayscale brightness jump caused by current overshoot when the driving transistor of the pixel driving circuit is switched, and improves the uniformity of grayscale transition.

[0023] Optional, Figure 2 This is a schematic diagram of another silicon-based display panel provided in an embodiment of the present invention. See also... Figure 1 and Figure 2 The silicon-based display panel includes a switch module 30, which is located at a connection node near the first power signal terminal VOLED or near the second power signal terminal VCOM.

[0024] For example, such as Figure 1In the illustrated embodiment, the silicon-based display panel may have only one switch module 30, which is located near the connection node of the first power signal terminal VOLED. Specifically, the silicon-based display panel includes multiple rows of pixel driving circuit groups, and each row of pixel driving circuit groups includes multiple pixel driving circuits 10. The first pole of the driving transistors M1 in all pixel driving circuits 10 is connected to the first connection node N1, and the switch module 30 is connected in series between the first connection node N1 and the first power signal terminal VOLED. Furthermore, in at least a portion of the subfield, a first driving mode is used for driving, that is, in the current subfield, the driving transistors M1 in all pixel driving circuits 10 are kept on, and data is written row by row to each row of pixel driving circuit groups. Since the switch module 30 located between the first connection node N1 and the first power signal terminal VOLED is in the off state, the positive power signal provided by the first power signal terminal VOLED cannot be transmitted to the first connection node N1. Therefore, even if all driving transistors M1 are on, the light-emitting element 20 cannot emit light. After the data for each row of pixel driving circuit groups in the current subfield is written, the control switch module 30 is turned on to connect the series branch between the first power signal terminal VOLED and the second power signal terminal VCOM, causing the light-emitting element 20 to emit light. The switching module 30 independently controls the on-time of the pixel driving circuit, thereby reducing the brightness of the silicon-based display panel and making it easier to achieve the theoretical brightness at low grayscale levels. Furthermore, the switch module 30 is positioned close to the first power signal terminal VOLED, meaning it is located outside the pixel driving circuit 10, ensuring a simple setup for the switch module 30.

[0025] In another embodiment, such as Figure 2As shown, the silicon-based display panel can be equipped with only one switch module 30, which is located near the connection node of the second power signal terminal VCOM. Specifically, the silicon-based display panel includes multiple rows of pixel driving circuit groups, and each row of pixel driving circuit groups includes multiple pixel driving circuits 10. The second terminal of the driving transistor M1 in all pixel driving circuits 10 is connected to the second connection node N2, and the switch module 30 is connected in series between the second connection node N1 and the second power signal terminal VCOM. In addition, in at least a portion of the subfield, the first driving mode is used for driving, that is, in the current subfield, the driving transistors M1 in all pixel driving circuits 10 are kept on, and data is written row by row to each row of pixel driving circuit groups. Since the switch module 30 located between the second connection node N2 and the second power signal terminal VCOM is in the off state, the series branch between the first power signal terminal VOLED and the second power signal terminal VCOM is still in the open circuit state. Therefore, even if all driving transistors M1 are in the on state, the light-emitting element 20 cannot emit light. After the data for each row of pixel driving circuit groups in the current subfield is written, the control switch module 30 is turned on to connect the series branch between the first power signal terminal VOLED and the second power signal terminal VCOM, causing the light-emitting element 20 to emit light. The switching module 30 independently controls the on-time of the pixel driving circuit, thereby reducing the brightness of the silicon-based display panel and making it easier to achieve the theoretical brightness at low grayscale levels. Furthermore, the switch module 30 is positioned close to the second power signal terminal VCOM, meaning it is located outside the pixel driving circuit 10, ensuring a simple setup for the switch module 30.

[0026] Optional, Figure 3 This is a schematic diagram of the structure of another silicon-based display panel provided in an embodiment of the present invention. Figure 4 This is a schematic diagram of the structure of another silicon-based display panel provided in an embodiment of the present invention. See also... Figure 3 and Figure 4 The silicon-based display panel includes multiple switching modules 30, each including a switching transistor M2. The switching modules 30 are correspondingly disposed with respect to the pixel driving circuit 10, and are located near the driving transistor M1. In one embodiment, as... Figure 3 As shown, the first terminal of the switching transistor M2 is electrically connected to the first power supply signal terminal VOLED, the second terminal of the switching transistor M2 is electrically connected to the first terminal of the driving transistor M1 in the corresponding pixel driving circuit 10, and the gate of the switching transistor M2 is electrically connected to the first clock signal terminal.

[0027] For example, such as Figure 3In the illustrated embodiment, the silicon-based display panel includes multiple pixel driving circuits 10, multiple light-emitting elements 20, and multiple switching modules 30. The pixel driving circuits 10 are electrically connected to the light-emitting elements 20, and the switching modules 30 are disposed within the pixel driving circuits 10. Specifically, the switching module 30 includes a switching transistor M2. The first terminal of the switching transistor M2 is electrically connected to the first power signal terminal VOLED, the second terminal of the switching transistor M2 is electrically connected to the first terminal of the driving transistor M1 in the corresponding pixel driving circuit 10, and the gate of the switching transistor M2 is electrically connected to the first clock signal terminal. In at least some subfields, a first driving mode is used for driving, that is, in the current subfield, all driving transistors M1 in the pixel driving circuits 10 are kept on, and data is written line by line to each row of pixel driving circuit groups. Since the switching transistor M2 located between the driving transistor M1 and the first power signal terminal VOLED is in a closed state, the positive power signal provided by the first power signal terminal VOLED cannot be transmitted to the driving transistor M1. Therefore, even if the driving transistor M1 is in a closed state, the corresponding light-emitting element 20 cannot emit light. After the data of each row of pixel driving circuit groups in the current subfield has been written, the control switch transistor M2 is turned on, so that the series branch between the first power signal terminal VOLED and the second power signal terminal VCOM is turned on, and the light-emitting element 20 emits light. The on-time of the pixel driving circuit is independently controlled by the switch module 30, thereby reducing the brightness of the silicon-based display panel and making it easier to achieve the theoretical brightness at low gray levels. In addition, since each pixel driving circuit 10 is provided with a corresponding switch module 30, independent control of each pixel driving circuit 10 can also be achieved, which is beneficial for achieving fine control of the light emission brightness.

[0028] In yet another embodiment, see Figure 4The energy storage module 30 includes a first capacitor C. The first plate of the first capacitor C is connected to the first electrode of the light-emitting element 20 at a third connection node N3. The second plate of the first capacitor C is electrically connected to the second electrode of the light-emitting element 20 and the second power signal terminal VCOM. The first electrode of the switching transistor M2 is electrically connected to the second electrode of the driving transistor M1, the second electrode of the switching transistor M2 is electrically connected to the third connection node N3, and the gate of the switching transistor M2 is electrically connected to the first clock signal terminal. That is, the switching transistor M2 is connected in series between the driving transistor M1 and the third connection node N3. In at least some subfields, the first driving mode is used for driving, that is, in the current subfield, the driving transistors M1 in all pixel driving circuits 10 are kept on, and data is written line by line to each row of pixel driving circuit groups. Since the switching transistor M2 located between the driving transistor M1 and the third connection node N3 is in the off state, the series branch between the first power signal terminal VOLED and the second power signal terminal VCOM is disconnected. Therefore, even if the driving transistor M1 is in the on state, the corresponding light-emitting element 20 cannot emit light. After the data of each row of pixel driving circuit groups in the current subfield has been written, the control switch transistor M2 is turned on, so that the series branch between the first power signal terminal VOLED and the second power signal terminal VCOM is turned on, and the light-emitting element 20 emits light. The on-time of the pixel driving circuit is independently controlled by the switch module 30, thereby reducing the brightness of the silicon-based display panel and making it easier to achieve the theoretical brightness at low gray levels. In addition, since each pixel driving circuit 10 is provided with a corresponding switch module 30, independent control of each pixel driving circuit 10 can also be achieved, which is beneficial for achieving fine control of the light emission brightness.

[0029] It should be noted that, please continue to refer to Figure 3 and Figure 4 The switching transistor M2 can be either a PMOS or an NMOS transistor; this embodiment of the invention does not impose any limitations on this, and those skilled in the art can configure it as needed. Furthermore, with... Figure 3Taking a PMOS transistor as an example, when switching transistor M2 is in the cutoff region, its second terminal is essentially open-circuited, the voltage is 0, and the current in the light-emitting element 20 is 0. At this time, the light-emitting element 20 is in the off state, and the silicon-based display panel is in the off state. When the control switching transistor M2 is turned on for a short time, its operating state is in the subthreshold region, the current flowing through the light-emitting element 20 is extremely small, and the light-emitting element 20 emits a weak light, and the silicon-based microdisplay is in the on state. When the control switching transistor M2 is continuously turned on, the current flowing through the light-emitting element 20 is constant and continuous, the light-emitting element 20 emits light continuously, and the silicon-based display panel is in the on state. Furthermore, in this embodiment of the invention, some subfields are configured to operate in a first driving mode. In the first driving mode, the driving transistor M1 is turned on when the pixel driving circuit 10 is writing data, and the switching transistor M2 is turned off when the pixel driving circuit is writing data and briefly turned on after the data writing of the current subfield is completed, so that the working state of the switching transistor M2 is in the subthreshold region, thereby reducing the current of the light-emitting element 20, thereby reducing the brightness of the silicon-based display panel, making it easier for low grayscale to reach the theoretical brightness.

[0030] It should also be noted that, in this embodiment of the invention, a control signal is provided to the switching transistor M2 through the first clock signal terminal, which can be independent of other clock signal terminals in the pixel driving circuit 10.

[0031] Optionally, based on the above embodiments, Figure 5 This is a schematic diagram of a scanning process provided in an embodiment of the present invention. For details, see [link to specific documentation]. Figures 1-5 The silicon-based display panel includes multiple subfields, including multiple cleared subfields and multiple uncleared subfields. Each row of pixel driving circuit groups includes multiple pixel driving circuits 10. The driving module of the silicon-based display panel includes a first driving mode and a second driving mode. In the first driving mode, the driving transistor M1 is turned on when the pixel driving circuit 10 performs data writing, and the switching module 30 is turned off when the pixel driving circuit performs data writing and turned on after the data writing of the current subfield is completed. In the second driving mode, both the driving transistor M1 and the switching module 30 are turned on when the pixel driving circuit 10 performs data writing, and the data of the current row of pixel driving circuit groups is cleared after the data writing of the current row of pixel driving circuit groups is completed and the display is finished. The uncleared subfields are driven using the first driving mode, and the cleared subfields are driven using the second driving mode.

[0032] For example, such as Figure 5 The illustrated embodiment uses a 10*10 silicon-based display panel as an example. Figure 5As shown, multiple subfields include a first subfield, a second subfield, ..., an nth subfield, where n is a positive integer greater than 2. The first subfield, the second subfield, ..., the nth subfield are scanned sequentially. This embodiment of the invention considers that since the first driving mode is a non-overlapping driving mode (i.e., display only occurs after all data in the subfield has been written), if all subfields use the first driving mode, it will lead to low transmission efficiency, a reduction in the number of subfields at a fixed frame rate, and a limitation on display time. Therefore, this embodiment of the invention sets up a scanning method combining the non-overlapping driving mode and the overlapping driving mode. Specifically, as... Figure 1 As shown, the first subfield is an undefined subfield, meaning it is driven by the first driving mode. Therefore, during the scan time of the first subfield, row data is written line by line. Figure 5 The black squares in the diagram represent the data to be written (each row's data is written in 1t). After 10t, all row pixel driving circuit data is written, thus controlling the switch module 30 to conduct. Since the driving transistor M1 is already in the conducting state, the silicon-based display panel begins to display. During this process, the data of each row pixel driving circuit is not cleared after writing. The nth subfield is the clearing subfield, meaning the second driving mode is used in the nth subfield. During the scanning time of the nth subfield, both the driving transistor M1 and the switch module 30 are in the conducting state. After the data of the current row pixel driving circuit group is written and displayed, the data of the current pixel driving circuit group is cleared. Figure 5 Taking a display time of 2t as an example, data is written to each row of pixel driving circuit groups line by line, with each row's writing time being 1t. After the data for the third row of pixel driving circuit groups is written, the data for the first row is cleared (the gray squares in the diagram represent cleared row data). At this point, the first row of pixel driving circuit groups displays a time of 2t. Similarly, after the data for the fourth row of pixel driving circuit groups is written, the data for the second row is cleared (the gray squares in the diagram represent cleared row data). This process of clearing row by row ensures that the display time for each row of pixel driving circuit groups is 2t. Furthermore, this embodiment of the invention, by combining the first and second driving modes, can improve transmission efficiency, solve the problem of low grayscale brightness jumps by independently controlling the voltage pulse width of the switching module, further reduce time accuracy to adjust low grayscale brightness to achieve theoretical brightness, and reduce the number of times the circuit switch is turned on and off.

[0033] It should be noted that the above embodiments are only exemplified by first performing the non-overlapping driving mode and then the clearing driving mode. Based on the above, the non-overlapping driving mode and the clearing driving mode can also be configured to alternate. For example, a frame of display from multiple silicon-based display panels further includes a first stage and a second stage. The first stage includes multiple clearing subfields and multiple non-overlapping subfields, which are alternately set. The second stage includes multiple clearing subfields. That is, in the first stage, the non-overlapping driving mode and the clearing driving mode alternate, while in the second stage, only the clearing driving mode is performed. The embodiments of the present invention do not limit the interleaving position and number of subfields in the non-overlapping display mode; those skilled in the art can set them as needed.

[0034] Understandable Figure 6 This is a grayscale display brightness comparison diagram provided by an embodiment of the present invention. For example... Figure 6 As shown, in the embodiment of the present invention, the grayscale brightness in the non-clear line + clear line scanning display test results (i.e., multiple subfields including multiple clear line subfields and multiple non-clear line subfields) is approximately the same as the theoretical grayscale brightness. However, the scrolling scan display test results in the background technology (i.e., only clear line subfields) have a large difference from the theoretical grayscale brightness, resulting in uneven grayscale transitions and insufficient detail in low grayscale display.

[0035] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A silicon-based display panel, characterized by, The silicon-based display panel includes multiple pixel driving circuits, multiple light-emitting elements, and at least one switching module; The pixel driving circuit includes a driving module and an energy storage module; The driving module includes a driving transistor, and the driving transistor and the light-emitting element are connected in series between the first power signal terminal and the second power signal terminal to form a series branch. The energy storage module is connected in parallel with the light-emitting element. The switching module is disposed on the connection node of the series branch, and the light-emitting element emits light when the driving transistor and the switching module are both turned on. A frame of the silicon-based display panel includes multiple subfields. In at least some subfields, the driving transistor is turned on when the pixel driving circuit is writing data, and the switching module is used to turn off when the pixel driving circuit is writing data and turn on after the data writing of the current subfield is completed.

2. The silicon-based display panel according to claim 1, characterized in that, The silicon-based display panel includes a switch module, which is located near the connection node of the first power signal terminal or the second power signal terminal.

3. The silicon-based display panel according to claim 2, characterized in that, The silicon-based display panel includes multiple rows of pixel driving circuit groups, and each row of pixel driving circuit groups includes multiple pixel driving circuits. The first terminal of the driving transistor in all pixel driving circuits is connected to the first connection node, and the switching module is connected in series between the first connection node and the first power signal terminal. The first power signal terminal outputs a positive power signal.

4. The silicon-based display panel according to claim 2, characterized in that, The silicon-based display panel includes multiple rows of pixel driving circuit groups, and each row of pixel driving circuit groups includes multiple pixel driving circuits. The second terminal of the driving transistor in all pixel driving circuits is connected to the second connection node, and the switching module is connected in series between the second connection node and the second power signal terminal. The second power signal terminal outputs a negative power signal.

5. The silicon-based display panel according to claim 1, characterized in that, The silicon-based display panel includes multiple switching modules, each of which includes a switching transistor; The switch module is configured correspondingly to the pixel driving circuit, and the switch module is located close to the driving transistor.

6. The silicon-based display panel according to claim 5, characterized in that, The first terminal of the switching transistor is electrically connected to the first power supply signal terminal, the second terminal of the switching transistor is electrically connected to the first terminal of the driving transistor in the corresponding pixel driving circuit, and the gate of the switching transistor is electrically connected to the first clock signal terminal.

7. The silicon-based display panel according to claim 5, characterized in that, The energy storage module includes a first capacitor, the first plate of the first capacitor is connected to the first electrode of the light-emitting element at a third connection node, and the second plate of the first capacitor is electrically connected to the second electrode of the light-emitting element and the second power signal terminal, respectively. The first terminal of the switching transistor is electrically connected to the second terminal of the driving transistor, the second terminal of the switching transistor is electrically connected to the third connection node, and the gate of the switching transistor is electrically connected to the first clock signal terminal.

8. The silicon-based display panel according to claim 5, characterized in that, In at least some subfields, the driving transistor is turned on when the pixel driving circuit is writing data, and the switching transistor is turned off when the pixel driving circuit is writing data, and briefly turned on after the data writing of the current subfield is completed, so that the operating state of the switching transistor is in the subthreshold region.

9. The silicon-based display panel according to claim 1, characterized in that, The multiple subfields include multiple clear subfields and multiple unclear subfields; The silicon-based display panel includes multiple rows of pixel driving circuit groups, and each row of pixel driving circuit groups includes multiple pixel driving circuits. The driving module of the silicon-based display panel includes a first driving mode and a second driving mode; In the first driving mode, the driving transistor is turned on when the pixel driving circuit performs data writing, and the switching module is used to turn off when the pixel driving circuit performs data writing and turn on after the data writing of the current subfield is completed. In the second driving mode, both the driving transistor and the switching module are turned on when the pixel driving circuit is writing data, and the data of the current row pixel driving circuit group is cleared after the data writing of the current row pixel driving circuit group is completed and the display is completed. The first driving mode is used in the unclear subfield, and the second driving mode is used in the clear subfield.

10. The silicon-based display panel according to claim 9, characterized in that, A single frame of the display from the multiple silicon-based display panels further includes a first stage and a second stage; The first stage includes multiple clearing subfields and multiple unclearing subfields, with the clearing subfields and unclearing subfields being alternately set; The second stage includes multiple of the aforementioned clearing subfields.

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