A light-emitting screen, its light-emitting control method, and its light-emitting device

Abstract

This invention discloses a light-emitting screen, its light-emitting control method, and its light-emitting device. The driving circuit in the light-emitting screen includes multiple source driving lines and source drivers connected to them, multiple gate driving lines and gate drivers connected to them, and a light-emitting control unit corresponding to each light-emitting structure. The light-emitting control unit can control the light emission of the light-emitting structure according to the voltage signals on the source and gate driving lines. It also includes first and second constant voltage signal lines and constant voltage drivers connected to them. Each source driving line is also connected to the first constant voltage signal line, and each gate driving line is also connected to the second constant voltage signal line. A first switching transistor is connected in series on the first constant voltage signal line between two adjacent source driving lines. A second switching transistor is connected in series on the second constant voltage signal line between two adjacent gate driving lines. By controlling the switching of the transistors, the switching between the scanning drive of the source and gate drivers and the synchronous drive of the constant voltage drivers is realized.

Description

Technical Field

[0001] The present invention relates to the field of light-emitting technology, and in particular to a light-emitting screen, a light-emitting control method thereon, and a light-emitting device. Background Technology

[0002] Because OLED (Organic Light-Emitting Diode) devices have the characteristics of surface light source, zoned control, and soft light, they are widely used in the display and lighting industries, especially in automotive taillights in recent years.

[0003] To achieve more dynamic effects in automotive taillights, digital OLED technology has been developed, which uses zone control to achieve different display effects. However, to achieve more and more refined driving effects, the area of ​​each zone needs to be set very small, which conventional constant current driving chips cannot meet. This necessitates the use of TFT (Thin Film Transistor) driving chips, similar to those used in displays. However, because current TFT driving uses a horizontal scanning method, the screen brightness cannot meet the requirements, and flickering issues also exist during display. Therefore, how to combine scanning driving and synchronous driving methods to achieve stable static display or dynamic display with diverse lighting effects is a problem that urgently needs to be solved in this field. Summary of the Invention

[0004] This invention provides a light-emitting screen, a light-emitting control method, and a light-emitting device to combine scanning drive and synchronous drive modes, enabling on-demand static or dynamic display.

[0005] According to one aspect of the present invention, a light-emitting screen is provided, comprising at least one light-emitting region, the light-emitting region comprising a plurality of light-emitting structures and a driving circuit for driving the light-emitting structures to emit light; the driving circuit comprises:

[0006] Multiple source drive lines, and source drivers connected to each source drive line;

[0007] Multiple gate drive lines, and gate drivers connected to each gate drive line;

[0008] A light-emitting control unit is connected to each light-emitting structure; the light-emitting control unit includes a data writing transistor and a driving transistor; the control terminal of each data writing transistor is connected to a gate driving line, and the first terminal of each data writing transistor is connected to a source driving line; the second terminal of each data writing transistor is used to write the data voltage on the source driving line into the gate of the driving transistor in the same light-emitting control unit, and the driving transistor is used to generate a driving current according to the data voltage;

[0009] A first constant voltage signal line, and a first constant voltage driver connected to the first constant voltage signal line;

[0010] The second constant voltage signal line, and the second constant voltage driver connected to the second constant voltage signal line;

[0011] Each source driving line is also connected to the first constant voltage signal line, and each gate driving line is also connected to the second constant voltage signal line; a first switching transistor is connected in series on the first constant voltage signal line between two adjacent source driving lines; a second switching transistor is connected in series on the second constant voltage signal line between two adjacent gate driving lines; the control terminals of the first switching transistor and the second switching transistor are both connected to a third constant voltage driver; the source driver and the gate driver are used to scan and drive the light-emitting structure; the first constant voltage driver and the second constant voltage driver are used to synchronously drive the light-emitting structure.

[0012] Optionally, multiple source drive lines extend along a first direction and are arranged along a second direction;

[0013] The plurality of gate drive lines extend along the second direction and are arranged along the first direction;

[0014] The array comprises multiple light-emitting structures arranged in a column, with the first direction being the direction of the column where the light-emitting structure is located and the second direction being the direction of the row where the light-emitting structure is located. The control terminals of the data writing transistors of the light-emitting structures in the same row are connected to the same gate driving line. The first terminals of the data writing transistors of the light-emitting structures in the same column are connected to the same source driving line.

[0015] Optionally, the light-emitting screen may further include a screen display controller;

[0016] The screen display controller is used to control the switching of the operating states of the source driver and the first constant voltage driver, and to control the switching of the operating states of the gate driver and the second constant voltage driver.

[0017] Optionally, the light-emitting control unit further includes a storage capacitor;

[0018] The second terminal of the data writing transistor is connected to the gate of the driving transistor in the same light-emitting control unit; the first terminal of the driving transistor is input with a power supply voltage, and the second terminal of the driving transistor is connected to the corresponding light-emitting structure.

[0019] The first end of the storage capacitor is connected to the gate of the driving transistor, and the second end of the storage capacitor is connected to the second end of the driving transistor.

[0020] Optionally, the number of driving transistors is at least two; the first terminals of at least two driving transistors are connected to the power supply voltage input terminal, the second terminals of at least two driving transistors are connected to the light-emitting structure, and the gates of at least two driving transistors are connected to the second terminal of the data writing transistor.

[0021] Optionally, the light-emitting control unit further includes a storage capacitor, a compensation transistor, a first light-emitting control transistor, a second light-emitting control transistor, a first initialization transistor, and a second initialization transistor;

[0022] The second terminal of the data writing transistor is connected to the first terminal of the driving transistor and the second terminal of the first light-emitting control transistor; the first terminal of the first light-emitting control transistor receives the power supply voltage; the second terminal of the driving transistor is connected to the first terminal of the second light-emitting control transistor, the second terminal of the compensation transistor, and the first terminal of the first initialization transistor.

[0023] The first terminal of the compensation transistor is connected to the gate of the driving transistor and the first terminal of the storage capacitor, and the second terminal of the storage capacitor is connected to the first terminal of the first light-emitting control transistor.

[0024] The second terminal of the first initialization transistor is connected to the first terminal of the second initialization transistor and the initialization signal input terminal;

[0025] The second terminal of the second light-emitting control transistor is connected to the anode of the light-emitting structure and the second terminal of the second initialization transistor;

[0026] The control terminals of the compensation transistor, the first light-emitting control transistor, the second light-emitting control transistor, the first initialization transistor, and the second initialization transistor all receive their respective control signals to control the conduction of their respective first and second terminals.

[0027] Optionally, the light-emitting structure includes an OLED light-emitting structure, an LED light-emitting structure, or a QLED light-emitting structure;

[0028] The data writing transistor includes an a-si thin-film transistor, an IGZO thin-film transistor, an LTPS thin-film transistor, or an LTPO thin-film transistor.

[0029] The driving transistor includes a-si thin-film transistor, IGZO thin-film transistor, LTPS thin-film transistor or LTPO thin-film transistor.

[0030] Optionally, the number of light-emitting regions can be multiple;

[0031] The shape of the light-emitting area includes polygons, circles, or ellipses;

[0032] Each of the light-emitting areas can be controlled individually.

[0033] According to another aspect of the present invention, a method for controlling the light emission of a light-emitting screen is provided, for controlling the light-emitting screen described in any embodiment of the present invention, comprising:

[0034] When scanning the light-emitting structure in the light-emitting region, the first switching transistor and the second switching transistor in the light-emitting region are disconnected by the third constant voltage driver, and the scan signal is input to the gate driving line line by line by the gate driver, and the data voltage is input to the source driving line simultaneously by the source driver.

[0035] When the light-emitting structure is driven synchronously, the first switching transistor and the second switching transistor in the light-emitting region are turned on by the third constant voltage driver, and a signal is simultaneously input to the gate driving line by the second constant voltage driver, and a data voltage is simultaneously input to the source driving line by the first constant voltage driver.

[0036] According to another aspect of the present invention, a light-emitting device is provided, comprising the light-emitting screen body described in any embodiment of the present invention.

[0037] The technical solution provided by this invention involves setting a first constant voltage signal line and a first constant voltage driver connected to the first constant voltage signal line in the screen body; a second constant voltage signal line and a second constant voltage driver connected to the second constant voltage signal line; and making each source driving line connected to the first constant voltage signal line and each gate driving line connected to the second constant voltage signal line. In other words, all gate driving lines and all source driving lines in the light-emitting screen body are connected in parallel, and each is input a voltage through a constant voltage driver after being connected in parallel. A first switching transistor is connected in series on the first constant voltage signal line between two adjacent source driving lines; a second switching transistor is connected in series on the second constant voltage signal line between two adjacent gate driving lines; the control terminals of both the first and second switching transistors are connected to a third constant voltage driver; the third constant voltage driver controls the conduction of the first and second switching transistors, thereby controlling the voltage of all gate driving lines and source driving lines in the screen, thus achieving a stable static display of the luminous screen; simultaneously, the original gate driver and source driver are retained, and after all the first and second switching transistors are disconnected by the third constant voltage driver, scan signals are input to the gate driving lines line by line through the gate driver, and data voltages are simultaneously input to the source driving lines through the source driver, thus achieving a dynamic display of the luminous screen. This combines scanning drive and synchronous drive methods, thereby enabling stable static display or dynamic display with diverse luminous effects as needed.

[0038] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a circuit diagram of a driving circuit in a light-emitting screen provided in an embodiment of the present invention;

[0041] Figure 2 This is a circuit diagram of a light-emitting control unit provided in an embodiment of the present invention;

[0042] Figure 3 This is a circuit diagram of another light-emitting control unit provided in an embodiment of the present invention;

[0043] Figure 4This is a circuit diagram of another light-emitting control unit provided in an embodiment of the present invention;

[0044] Figure 5 This is a diagram illustrating the light-emitting effect of a light-emitting screen according to an embodiment of the present invention.

[0045] Figure 6 This is another light-emitting effect diagram of the light-emitting screen provided by an embodiment of the present invention. Detailed Implementation

[0046] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0047] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0048] This invention provides a light-emitting screen, including at least one light-emitting area, the light-emitting area including multiple light-emitting structures and a driving circuit for driving the light-emitting structures to emit light; Figure 1 This is a circuit diagram of a driving circuit in a light-emitting screen according to an embodiment of the present invention, for reference. Figure 1 The driving circuit includes:

[0049] Multiple source drive lines S, and a source driver 1 connected to each source drive line S;

[0050] Multiple gate drive lines G, and a gate driver 2 connected to each gate drive line G;

[0051] A light-emitting control unit is connected to each light-emitting structure D; the light-emitting control unit includes a data writing transistor T1 and a driving transistor (not shown); the control terminal of each data writing transistor T1 is connected to a gate driving line G, and the first terminal of each data writing transistor T1 is connected to a source driving line S; the second terminal of each data writing transistor T1 is used to write the data voltage on the source driving line S into the gate of the driving transistor in the same light-emitting control unit, and the driving transistor is used to generate a driving current according to the data voltage.

[0052] The first constant voltage signal line L1, and the first constant voltage driver SVD1 connected to the first constant voltage signal line L1;

[0053] The second constant voltage signal line L2, and the second constant voltage driver GVD1 connected to the second constant voltage signal line L2;

[0054] Each source driving line S is connected to a first constant voltage signal line L1, and each gate driving line G is connected to a second constant voltage signal line L2. A first switching transistor Q1 is connected in series on the first constant voltage signal line L1 between two adjacent source driving lines S. A second switching transistor Q2 is connected in series on the second constant voltage signal line L2 between two adjacent gate driving lines G. The control terminals of the first switching transistor Q1 and the second switching transistor Q2 are both connected to the third constant voltage driver GVD2. The source driver 1 and the gate driver 2 are used to scan and drive the light-emitting structure D. The first constant voltage driver SVD1 and the second constant voltage driver GVD1 are used to synchronously drive the light-emitting structure D.

[0055] Specifically, the light-emitting screen may include one or more light-emitting areas. Within each light-emitting area, the screen includes multiple light-emitting structures D and a driving circuit for driving the light-emitting structures D to emit light. The light-emitting structure D can be an OLED light-emitting structure D, an LED light-emitting structure D, or a QLED light-emitting structure D. The driving circuit includes multiple source driving lines S( Figure 1 Three or more gate drive lines G are shown as an example. Figure 1 The diagram shows three examples: a source driver 1 connected to one end of each source drive line S, a gate driver 2 connected to one end of each gate drive line G, and a light-emitting control unit connected to the light-emitting structure D in a one-to-one correspondence.

[0056] The light-emitting control unit controls the on / off state and brightness value of the light-emitting structure D. Each light-emitting control unit includes a data writing transistor T1 and a driving transistor. The control terminal of each data writing transistor T1 is connected to a gate driving line G, and the first terminal of each data writing transistor T1 is connected to a source driving line S. The gate driver 2 can send scan signals to the scan driving lines one by one, so that the scan driving lines can send scan signals to the gate of the data writing transistor T1 connected to them, thereby turning on the first and second terminals of the data writing transistor T1. The source driver 1 can simultaneously send data voltage to the source driving line S connected to it, so that the turned-on data writing transistor T1 can write the received data voltage to the gate of the driving transistor. The source of the driving transistor receives the power supply voltage, and the driving transistor generates a driving current according to the gate voltage (the written data voltage) and the source voltage (the power supply voltage), thereby driving the light-emitting structure D to emit light. By sending scan signals to the scan driving lines one by one, the gate driver 2 can gradually light up the light-emitting structure D, thereby achieving more and more refined dynamic driving effects.

[0057] When the data voltage written to the gate of driving transistor T2 is the same, the brightness value of the light-emitting structure D is the same; when the data voltage written to the gate of driving transistor T2 is different, the brightness value of the light-emitting structure D is different. The source driver 1 sends data voltages that are the same or different to different source driving lines S connected to it, which can be set according to actual needs. Data writing transistor T1 can be an a-Si thin-film transistor, an IGZO thin-film transistor, an LTPS thin-film transistor, or an LTPO thin-film transistor; driving transistor T2 can also be an a-Si thin-film transistor, an IGZO thin-film transistor, an LTPS thin-film transistor, or an LTPO thin-film transistor. Optionally, data writing transistor T1 and driving transistor T2 can be of the same type.

[0058] Based on this, the driving circuit in the light-emitting screen provided in this embodiment of the invention further includes: a first constant voltage signal line L1, a first constant voltage driver SVD1 connected to the first constant voltage signal line L1, a second constant voltage signal line L2, and a second constant voltage driver GVD1 connected to the second constant voltage signal line L2. Each source driving line S is also connected to the first constant voltage signal line L1, and each gate driving line G is also connected to the second constant voltage signal line L2. That is, all the gate driving lines G in the light-emitting screen are connected in parallel, and all the source driving lines S are connected in parallel. Furthermore, a first switching transistor Q1 is connected in series on the first constant voltage signal line L1 between two adjacent source driving lines S; a second switching transistor Q2 is connected in series on the second constant voltage signal line L2 between two adjacent gate driving lines G; the control terminals of the first switching transistor Q1 and the second switching transistor Q2 are both connected to the third constant voltage driver GVD2, and the third constant voltage driver GVD2 can control the conduction of the first switching transistor Q1 and the second switching transistor Q2.

[0059] When all first switching transistors Q1 are turned on, the first constant voltage driver SVD1 can transmit a first voltage signal to the entire first constant voltage signal line L1. This first voltage signal can be transmitted as data voltage to all source driving lines S in the light-emitting area. When all second switching transistors Q2 are turned on, the second constant voltage driver GVD1 can transmit a second voltage signal to the entire second constant voltage signal line L2. This second voltage signal can be transmitted to all gate driving lines G in the light-emitting area, serving as a scan signal to turn on the data writing transistor T1, thereby writing the data voltage to the gate of the corresponding driving transistor. After the source of each driving transistor T2 receives the power supply voltage, all light-emitting structures D in the light-emitting area are illuminated, thus achieving a stable static driving effect, improving the brightness of the light-emitting area during illumination, and reducing flickering during illumination. Furthermore, since the control terminals of all first control transistors Q1 and all second control transistors Q2 are connected to the third constant voltage driver GVD2 and receive the same control signal, synchronous control of the light-emitting units can be achieved.

[0060] It should be noted that when the first switching transistor Q1 and the second switching transistor Q2 are turned on, and the light-emitting structure in the light-emitting area is synchronously driven by the first constant voltage driver SVD1 and the second constant voltage driver GVD1, the source driver 1 and the gate driver 2 do not send voltage signals.

[0061] The light-emitting screen provided in this embodiment of the invention connects all gate driving lines and all source driving lines in parallel, and then inputs voltage to each through a constant voltage driver. A first switching transistor is connected in series on the first constant voltage signal line between two adjacent source driving lines; a second switching transistor is connected in series on the second constant voltage signal line between two adjacent gate driving lines; the control terminals of both the first and second switching transistors are connected to a third constant voltage driver. The third constant voltage driver controls the conduction of the first and second switching transistors, thereby controlling the voltage of all gate driving lines and source driving lines in the screen, thus achieving stable static display of the light-emitting screen. Simultaneously, the original gate and source drivers are retained. After the third constant voltage driver controls the disconnection of all the first and second switching transistors, a scan signal is input line by line to the gate driving lines through the gate driver, and a data voltage is simultaneously input to the source driving lines through the source driver, thus achieving dynamic display of the light-emitting screen. This combines scanning drive and synchronous drive methods, thereby achieving stable static display or dynamic display with diverse lighting effects as needed. For example, the luminous screen is the screen in the taillight of a car. When the car is in motion, a static display can be used to achieve higher light intensity and eliminate flicker, while a dynamic display can be used when the car starts or when relevant information needs to be displayed.

[0062] In one embodiment of the present invention, reference is made to... Figure 1 Multiple source drive lines S extend along a first direction and are arranged along a second direction; multiple gate drive lines G extend along a second direction and are arranged along a first direction.

[0063] In this array, multiple light-emitting structures D are arranged in a first direction, which is the direction of the column where the light-emitting structure D is located, and the second direction is the direction of the row where the light-emitting structure D is located. The control terminal of the data writing transistor T1 of the light-emitting structure D in the same row is connected to the same gate driving line G. The first terminal of the data writing transistor T1 of the light-emitting structure D in the same column is connected to the same source driving line S.

[0064] This can be understood as follows: the light-emitting structures D in the light-emitting region are arranged in an array. Each source driving line S extends along the column direction of the light-emitting structure D, and each source driving line S is arranged sequentially along the row direction of the light-emitting structure D. Each gate driving line G extends along the row direction of the light-emitting structure D, and each gate driving line G is arranged sequentially along the column direction of the light-emitting structure D. Multiple source driving lines S and multiple gate driving lines G can form multiple intersection points, and each light-emitting structure D can correspond one-to-one with an intersection point. This improves the regularity of the arrangement of the light-emitting structures D and reduces the difficulty of wiring setup. Source driver 1 and gate driver 2 can drive the light-emitting structures D row by row.

[0065] In one embodiment of the present invention, the light-emitting screen further includes a screen display controller (not shown); the screen display controller can be used to control the working state of switching the source driver 1 and the first constant voltage driver SVD1, and to control the working state of switching the gate driver 2 and the second constant voltage driver GVD1.

[0066] This can be understood as follows: a higher-level logic circuit (a dynamic and static display controller) controls whether to use gate driver 2 and source driver 1 or a constant voltage driver. When displaying a static image, a constant voltage driver is used. The third constant voltage driver GVD2 controls the conduction of the first switching transistor Q1 and the second switching transistor Q2 in the light-emitting area. Simultaneously, the second constant voltage driver GVD1 inputs a scan signal (second voltage signal) to the gate drive line G, and the first constant voltage driver SVD1 inputs a data voltage (first voltage signal) to the source drive line S. This allows the data writing transistor T1 to write the received data voltage to the gate of the driving transistor. The source of the driving transistor receives the power supply voltage, and the driving transistor generates a driving current based on the gate voltage (written data voltage) and the source voltage (power supply voltage), thereby driving the light-emitting structure D to emit light. When dynamic driving is required, gate driver 2 and source driver 1 are used for scan driving. In this case, the third constant voltage driver GVD2 controls the disconnection of the first switching transistor Q1 and the second switching transistor Q2 in the light-emitting area.

[0067] In one embodiment of the present invention, reference is made to... Figure 2 The light-emitting control unit also includes a storage capacitor C;

[0068] The second terminal of the data writing transistor T1 is connected to the gate of the driving transistor T2 in the same light-emitting control unit; the first terminal of the driving transistor T2 is input with the power supply voltage VDD, and the second terminal of the driving transistor T2 is connected to the corresponding light-emitting structure D.

[0069] The first terminal of the storage capacitor C is connected to the gate of the driving transistor T2, and the second terminal of the storage capacitor C is connected to the second terminal of the driving transistor T2.

[0070] This can be understood as, Figure 2The light-emitting control unit shown includes two transistors and a capacitor, and is often referred to in the art as a "2T1C" pixel driving circuit. The second terminal of each data writing transistor T1 is connected to the gate of the driving transistor T2 in the same light-emitting control unit, thereby writing the received data voltage to the gate of the driving transistor T2. The storage capacitor C is used to store the data voltage written to the gate of the driving transistor T2. Upon receiving the data voltage, the gate of the driving transistor T2 is turned on, simultaneously controlling the power supply voltage VDD of the light-emitting structure D to a high level, thus illuminating the light-emitting structure D.

[0071] Optionally, the transistors, first switching transistor Q1, and second switching transistor Q2 in the light-emitting control unit are all N-type transistors, meaning they are turned on when a high-level signal is received at the control terminal (gate) of the N-type transistor. Alternatively, the transistors, first switching transistor Q1, and second switching transistor Q2 in the light-emitting control unit are all P-type transistors, meaning they are turned on when a low-level signal is received at the control terminal (gate) of the P-type transistor. For example, the transistors, first switching transistor Q1, and second switching transistor Q2 in the light-emitting control unit are all N-type transistors. When synchronously driving the light-emitting structure D, the third constant-voltage driver GVD2 outputs a high level, thereby turning on the first switching transistor Q1 and the second switching transistor Q2, allowing all gate drive lines G to receive a high level output from the second constant-voltage driver GVD1. The high-level signal of the second constant voltage driver GVD1 is transmitted to the gate of the data writing transistor T1 of all light-emitting structures D, thereby turning on the data writing transistor T1; at the same time, all source driving lines S can receive the high-level output of the first constant voltage driver SVD1, thereby transmitting the high-level signal of the first constant voltage driver SVD1 to the gate of the driving transistor T2, turning on T2, and controlling the VDD of the light source to be at a high level, thereby lighting up all light-emitting structures D at the same time.

[0072] In one embodiment of the present invention, reference is made to... Figure 3 The number of driving transistors T2 is at least two. Figure 3 The diagram illustrates two driving transistors T2; the first terminals of at least two driving transistors T2 are connected to the input terminal of the power supply voltage VDD, and the second terminals of at least two driving transistors T2 are connected to the light-emitting structure D; the gates of at least two driving transistors T2 are connected to the second terminal of the data writing transistor T1. This can be understood as using multiple driving transistors T2 connected in parallel, such that the driving current flowing to the light-emitting structure D is the sum of the currents flowing through each driving transistor T2, thereby increasing the driving current flowing to the light-emitting structure D and improving the brightness of the light-emitting structure D.

[0073] In one embodiment of the present invention, reference is made to... Figure 4The light-emitting control unit also includes a storage capacitor C, a compensation transistor T3, a first light-emitting control transistor T5, a second light-emitting control transistor T6, a first initialization transistor T4, and a second initialization transistor T7.

[0074] The second terminal of the data writing transistor T1 is connected to the first terminal of the driving transistor T2 and the second terminal of the first light-emitting control transistor T5; the first terminal of the first light-emitting control transistor T5 is input with the power supply voltage VDD; the second terminal of the driving transistor T2 is connected to the first terminal of the second light-emitting control transistor T6, the second terminal of the compensation transistor T3 and the first terminal of the first initialization transistor T4.

[0075] The first terminal of the compensation transistor T3 is connected to the gate of the driving transistor T2 and the first terminal of the storage capacitor C, and the second terminal of the storage capacitor C is connected to the first terminal of the first light-emitting control transistor T5.

[0076] The second terminal of the first initialization transistor T4 is connected to the first terminal of the second initialization transistor T7 and the initialization signal input terminal.

[0077] The second terminal of the second light-emitting control transistor T6 is connected to the anode of the light-emitting structure D and the second terminal of the second initialization transistor T7.

[0078] The control terminals of compensation transistor T3, first light-emitting control transistor T5, second light-emitting control transistor T6, first initialization transistor T4, and second initialization transistor T7 all receive their respective control signals to control the conduction of their respective first and second terminals.

[0079] This can be understood as, Figure 4The light-emitting control unit shown contains seven transistors and one capacitor, and is often referred to in the art as a "7T1C" pixel driving circuit. During the initialization phase, the compensation transistor T3 is turned on by control signal S2, and the first initialization transistor T4 and the second initialization transistor T7 are turned on by control signal S3. The initialization voltage Vref is sequentially input to the gate of the driving transistor T2 through the first initialization transistor T4 and the compensation transistor T3; the initialization voltage Vref is also input to the anode of the light-emitting structure D through the second initialization transistor T7. During the data writing phase, the data writing transistor T1 is turned on by the scan signal (control signal S1) on the gate driving line, and the compensation transistor T3 is turned on by control signal S2, so that the data voltage V input from the source driving line can sequentially pass through the data writing transistor T1, the driving transistor T2, and the compensation transistor T3 to be written to the gate of the driving transistor T2. During the light-emitting stage, the first light-emitting control transistor T5 and the second light-emitting control transistor T6 are turned on by the control signal EM, thereby transmitting the power supply voltage VDD to the first terminal, i.e., the source, of the driving transistor T2. This causes the driving transistor T2 to generate a driving current based on the gate voltage (the data voltage written) and the source voltage (the power supply voltage VDD), driving the light-emitting structure D to emit light. The cathode of the light-emitting structure D is connected to a low level VSS. Optionally, the transistors, the first switching transistor Q1, and the second switching transistor Q2 in the light-emitting control unit can be N-type transistors or P-type transistors, which will not be elaborated here. The number of driving transistors T2 can also be multiple to increase the driving current. Furthermore, the light-emitting control unit can also be other pixel driving circuits, as long as they can achieve the desired results of the technical solution of this invention, which are not limited herein.

[0080] In one embodiment of the present invention, reference is made to... Figures 5-6 The light-emitting screen includes multiple light-emitting areas 100; each light-emitting area 100 can be controlled independently, and each light-emitting area 100 includes, for example: Figure 1 The driving circuit shown allows each light-emitting area 100 to be controlled by a driver that can control both static and dynamic displays. Each light-emitting area 100 includes a gate driver, a source driver, and a constant voltage driver, enabling the display of different graphics by individually controlling each light-emitting area during static display. The shapes of the light-emitting areas include polygons, circles, or ellipses. Figures 5-6 The luminous area is drawn as a triangle, as an example. Figure 5 An example is drawn showing a triangle formed by illuminating three light-emitting areas 100. Figure 6 An example is drawn showing a parallelogram formed by illuminating six light-emitting areas 100.

[0081] This invention also provides a method for controlling the light emission of a light-emitting screen, used to control the light-emitting screen described in any of the above embodiments. The method for controlling the light emission of a light-emitting screen includes:

[0082] When scanning the light-emitting structure D in the light-emitting area line by line, the first switching transistor Q1 and the second switching transistor Q2 in the light-emitting area are disconnected by the third constant voltage driver GVD2, and the scanning signal is input to the gate driving line G line by line by the gate driver 2, and the data voltage is input to the source driving line S by the source driver 1 at the same time.

[0083] When synchronously driving the light-emitting structure D, the first switching transistor Q1 and the second switching transistor Q2 in the light-emitting region are controlled by the third constant voltage driver GVD2, and a scan signal is simultaneously input to the gate driving line G by the second constant voltage driver GVD1, and a data voltage is simultaneously input to the source driving line S by the first constant voltage driver SVD1.

[0084] Specifically, a higher-level logic circuit (screen display dynamic and static controller) can be used to control whether to use gate and source driver 1 or constant voltage driver. When displaying a static image, constant voltage driver is used. The third constant voltage driver GVD2 controls the conduction of the first switching transistor Q1 and the second switching transistor Q2 in the light-emitting area, and simultaneously inputs a scan signal (second voltage signal) to the gate driving line G through the second constant voltage driver GVD1, and simultaneously inputs a data voltage (first voltage signal) to the source driving line S through the first constant voltage driver SVD1. This allows the data writing transistor T1 to write the received data voltage to the gate of the driving transistor. The source of the driving transistor receives the power supply voltage VDD, and the driving transistor generates a driving current according to the gate voltage (written data voltage) and the source voltage (power supply voltage VDD), thereby driving the light-emitting structure D to emit light. When dynamic driving is required, gate driver 2 and source driver 1 are used for scan driving. At this time, the third constant voltage driver GVD2 controls the deactivation of the first switching transistor Q1 and the second switching transistor Q2 in the light-emitting area.

[0085] This technology combines scanning and synchronous driving methods, enabling either stable static displays or dynamic displays with diverse lighting effects on demand. For example, in the case of a car taillight, a static display can be used during vehicle operation to achieve higher light intensity and flicker-free operation, while a dynamic display can be used when the car starts or when relevant information needs to be displayed.

[0086] This invention also provides a light-emitting device, such as a car taillight, which includes the light-emitting screen described in any embodiment of this invention. It has the same technical effects and will not be repeated here.

[0087] 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 light-emitting screen, characterized in that, The light-emitting screen body comprises at least one light-emitting region, the light-emitting region comprises a plurality of light-emitting structures and a driving circuit for driving the light-emitting structures to emit light; The driving circuit comprises: a plurality of source driving lines and a source driver connected to each source driving line; a plurality of gate driving lines and a gate driver connected to each gate driving line; a light-emitting control unit connected to each light-emitting structure; the light-emitting control unit comprises a data writing transistor and a driving transistor; a control end of each data writing transistor is connected to a gate driving line; a first end of each data writing transistor is connected to a source driving line; a second end of each data writing transistor is used for writing a data voltage on the source driving line to a gate of the driving transistor in the same light-emitting control unit; the driving transistor is used for generating a driving current according to the data voltage; a first constant voltage signal line and a first constant voltage driver connected to the first constant voltage signal line; a second constant voltage signal line and a second constant voltage driver connected to the second constant voltage signal line; wherein each source driving line is further connected to the first constant voltage signal line, and each gate driving line is further connected to the second constant voltage signal line; a first switch transistor is connected in series on the first constant voltage signal line between two adjacent source driving lines; a second switch transistor is connected in series on the second constant voltage signal line between two adjacent gate driving lines; a control end of the first switch transistor and a control end of the second switch transistor are connected to a third constant voltage driver; the source driver and the gate driver are used for scanning and driving the light-emitting structures; the first constant voltage driver and the second constant voltage driver are used for synchronously driving the light-emitting structures; the third constant voltage driver controller is used for controlling the turn-on and turn-off of the first switch transistor and the second switch transistor; the first constant voltage driver is used for transmitting a first voltage signal when the first switch transistor is turned on, and the second constant voltage driver is used for transmitting a second voltage signal when the second switch transistor is turned on.

2. The light-emitting screen body according to claim 1, wherein: a plurality of the source driving lines extend along a first direction and are arranged along a second direction; a plurality of the gate driving lines extend along the second direction and are arranged along the first direction; wherein a plurality of the light-emitting structures are arranged in an array, the first direction is the direction of a column of light-emitting structures, and the second direction is the direction of a row of light-emitting structures; the control ends of the data writing transistors corresponding to light-emitting structures in the same row are connected to the same gate driving line; the first ends of the data writing transistors corresponding to light-emitting structures in the same column are connected to the same source driving line.

3. The light emitting panel of claim 1, wherein, further comprising a screen body display controller; the screen body display controller is used for controlling the switching of the working states of the source driver and the first constant voltage driver, and for controlling the switching of the working states of the gate driver and the second constant voltage driver.

4. The light emitting panel of claim 1, wherein, the light-emitting control unit further comprises a storage capacitor; A second end of the data write transistor is connected with a gate of a driving transistor in the same light-emitting control unit; a first end of the driving transistor inputs a power supply voltage, and a second end of the driving transistor is connected with a corresponding light-emitting structure; A first end of the storage capacitor is connected with the gate of the driving transistor, and a second end of the storage capacitor is connected with the second end of the driving transistor.

5. The light emitting panel of claim 3, wherein, The number of the driving transistors is at least two; the first ends of the at least two driving transistors are all connected with a power supply voltage input end, the second ends of the at least two driving transistors are all connected with the light-emitting structure, and the gates of the at least two driving transistors are all connected with the second end of the data write transistor.

6. The light emitting panel of claim 1, wherein, The light-emitting control unit further comprises a storage capacitor, a compensation transistor, a first light-emitting control transistor, a second light-emitting control transistor, a first initialization transistor and a second initialization transistor; A second end of the data write transistor is connected with a first end of the driving transistor and a second end of the first light-emitting control transistor; a first end of the first light-emitting control transistor inputs a power supply voltage; a second end of the driving transistor is connected with a first end of the second light-emitting control transistor, a second end of the compensation transistor and a first end of the first initialization transistor; A first end of the compensation transistor is connected with the gate of the driving transistor and a first end of the storage capacitor, and a second end of the storage capacitor is connected with a first end of the first light-emitting control transistor; A second end of the first initialization transistor is connected with a first end of the second initialization transistor and an initialization signal input end; A second end of the second light-emitting control transistor is connected with an anode of the light-emitting structure and a second end of the second initialization transistor; The control end of the compensation transistor, the control end of the first light-emitting control transistor, the control end of the second light-emitting control transistor, the control end of the first initialization transistor and the control end of the second initialization transistor all receive respective control signals to control the conduction of the respective first end and second end.

7. The light-emitting screen body according to claim 1, wherein The light-emitting structure comprises an OLED light-emitting structure, an LED light-emitting structure or a QLED light-emitting structure; The data write transistor comprises an a-si thin film transistor, an IGZO thin film transistor, an LTPS thin film transistor or an LTPO thin film transistor; The driving transistor comprises an a-si thin film transistor, an IGZO thin film transistor, an LTPS thin film transistor or an LTPO thin film transistor.

8. The light-emitting screen body according to claim 1, wherein The number of the light-emitting areas is multiple; The shape of the light-emitting area comprises a polygon, a circle or an ellipse; The light-emitting areas can be individually controlled.

9. A method for controlling the light emission of a light-emitting screen, characterized in that, A control method for the light-emitting screen body according to any one of claims 1-8, comprising: When scanning the light emitting structure in the light emitting area, the third constant voltage driver is used to control the first and second switch transistors in the light emitting area to be off, the gate driver is used to input scanning signals to the gate driving lines row by row, and the source driver is used to input data voltages to the source driving lines simultaneously; When synchronously driving the light emitting structure, the third constant voltage driver is used to control the first and second switch transistors in the light emitting area to be on, the second constant voltage driver is used to input signals to the gate driving lines simultaneously, and the first constant voltage driver is used to input data voltages to the source driving lines simultaneously.

10. A light-emitting device, characterized in that, The light emitting screen body according to any one of claims 1-8.

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