Light-emitting control circuit, light-emitting control method and display panel

Abstract

The embodiment of the invention discloses a light-emitting control circuit, a light-emitting control method and a display panel, the light-emitting control circuit comprises a plurality of cascaded light-emitting control sub-circuits, each light-emitting control sub-circuit correspondingly controls a row of sub-pixels, each sub-pixel comprises a first light-emitting diode and a second light-emitting diode, a light-emitting control unit outputs a first light-emitting signal and a second light-emitting signal according to a light-emitting control signal, a first control signal, a second control signal and a preset potential to respectively control the opening and closing of a first light-emitting diode and a second light-emitting diode, so that the power consumption of the display panel is effectively reduced; the problem that two light-emitting control circuits need to be arranged on each row of sub-pixels in a peep-proof OLED display panel, two light-emitting control signals are output respectively, and consequently power consumption is large is at least solved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a light emitting control circuit, a light emitting control method and a display panel. Background Art

[0002] An organic light emitting diode (OLED) display panel with an anti-peeping function generally divides a sub-pixel into two areas, with a light-emitting diode set in each area. In the anti-peeping mode, one of the light-emitting diodes emits light under the control of a light-emitting control signal, and in the normal mode, the other light-emitting diode emits light under the control of a light-emitting control signal. Therefore, two light-emitting control circuits need to be set for each row of sub-pixels, and two light-emitting control signals are output respectively, resulting in high power consumption. Summary of the invention

[0003] The embodiments of the present application provide a light emitting control circuit, a light emitting control method and a display panel, so as to at least solve the problem that two light emitting control circuits need to be provided for each row of sub-pixels in an anti-peeping OLED display panel, and two light emitting control signals are output respectively, resulting in high power consumption.

[0004] In a first aspect, an embodiment of the present application provides a light-emitting control circuit, which includes a plurality of cascaded light-emitting control sub-circuits, each of which controls a row of sub-pixels, each of which includes a first light-emitting diode and a second light-emitting diode, and each of which includes: an input end, configured to receive an input signal; an output end, connected to a light-emitting control unit and an input end of the light-emitting control sub-circuit of the next level, the output end being configured to output a light-emitting control signal; the light-emitting control unit being connected to the light-emitting control signal, a first control signal, a second control signal and a preset potential, the light-emitting control unit being configured to output a first light-emitting signal and a second light-emitting signal according to the light-emitting control signal, the first control signal, the second control signal and the preset potential; wherein the first light-emitting signal controls the first light-emitting diode, and the second light-emitting signal controls the second light-emitting diode; and the first control signal and the second control signal are inverted.

[0005] In one embodiment, the light-emitting control unit includes: a first control switch, connecting the output end and the second control switch, and connecting the first control signal; the second control switch, connecting the first control switch, and connecting the second control signal and the preset potential; a third control switch, connecting the output end and the fourth control switch, and connecting the second control signal; the fourth control switch, connecting the third control switch, and connecting the first control signal and the preset potential; wherein a first node is set between the first control switch and the second control switch, and the first node is configured to output the first light-emitting signal; a second node is set between the third control switch and the fourth control switch, and the second node is configured to output the second light-emitting signal.

[0006] In one embodiment, the first control switch includes a first PMOS tube, the second control switch includes a second PMOS tube, the third control switch includes a third PMOS tube, the fourth control switch includes a fourth PMOS tube, and the preset potential is a preset high potential; wherein, when the first control signal is a low potential and the second control signal is a high potential, the first node outputs a periodic pulse signal, and the second node outputs a high potential signal; when the first control signal is a high potential and the second control signal is a low potential, the second node outputs a periodic pulse signal, and the first node outputs a high potential signal.

[0007] In one embodiment, the light-emitting control subcircuit also includes: a coupling pull-down unit, connected to a first clock signal and a preset high potential, connecting a third node and a fourth node, the coupling pull-down unit being configured to control the potentials of the third node and the fourth node according to the first clock signal and the preset high potential; a signal input unit, connected to the input signal and the second clock signal, connecting a fifth node, the signal input unit being configured to receive the input signal and transmit the input signal to the fifth node according to the second clock signal; a signal output unit, connected to the preset high potential and the preset low potential, connecting the fourth node, the sixth node and the output end, the signal output unit being configured to control the conduction or disconnection between the preset high potential and the output end, and to control the conduction or disconnection between the preset low potential and the output end.

[0008] In one embodiment, the light emitting control subcircuit also includes: a high potential output maintaining unit, which is connected to the first clock signal, the second clock signal and the preset low potential, and connects the third node, the fifth node and the sixth node, and the high potential output maintaining unit is configured to control the potential of the sixth node according to the first clock signal, the second clock signal and the preset low potential.

[0009] In one embodiment, the first control switch includes a first NMOS tube, the second control switch includes a second NMOS tube, the third control switch includes a third NMOS tube, the fourth control switch includes a fourth NMOS tube, and the preset potential is a preset low potential; wherein, when the first control signal is a high potential and the second control signal is a low potential, the first light-emitting signal output by the first node is a periodic pulse signal, and the second light-emitting signal output by the second node is a low potential signal; when the first control signal is a low potential and the second control signal is a high potential, the second light-emitting signal output by the second node is a periodic pulse signal, and the first light-emitting signal output by the first node is a low potential signal.

[0010] In one embodiment, the light-emitting control subcircuit also includes: a coupling pull-up unit, connected to a first clock signal and a preset low potential, electrically connected to a third node and a fourth node, the coupling pull-up unit being configured to control the potentials of the third node and the fourth node according to the first clock signal and the preset low potential; a signal input unit, connected to the input signal and the second clock signal, connected to the fifth node, the signal input unit being configured to receive the input signal and transmit the input signal to the fifth node according to the second clock signal; a signal output unit, connected to the preset low potential and the preset high potential, connected to the fourth node, the sixth node and the output end, the signal output unit being configured to control the conduction or disconnection between the preset low potential and the output end, and to control the conduction or disconnection between the preset high potential and the output end.

[0011] In one embodiment, the light emitting control subcircuit also includes: a low potential output maintaining unit, which is connected to the first clock signal, the second clock signal and the preset high potential, and connects the third node, the fifth node and the sixth node, and the low potential output maintaining unit is configured to control the potential of the sixth node according to the first clock signal, the second clock signal and the preset high potential.

[0012] In the second aspect, an embodiment of the present application also provides a light-emitting control method, which is applied to the light-emitting control circuit described in any of the above embodiments, and the method includes: outputting a first light-emitting signal and a second light-emitting signal according to the light-emitting control signal, the first control signal, the second control signal and the preset potential; wherein, the first light-emitting signal corresponds to controlling the first light-emitting diode, and the second light-emitting signal corresponds to controlling the second light-emitting diode; the first control signal and the second control signal are inverted.

[0013] In one embodiment, the outputting of the first light-emitting signal and the second light-emitting signal according to the light-emitting control signal, the first control signal, the second control signal and the preset potential includes: when the first control signal is at a low potential and the second control signal is at a high potential, outputting the first light-emitting signal to make the first light-emitting diode emit light, and outputting the second light-emitting signal to make the second light-emitting diode not emit light; wherein the first light-emitting signal is a periodic pulse signal, and the second light-emitting signal is a high potential signal; when the first control signal is at a high potential and the second control signal is at a low potential, outputting the first light-emitting signal to make the first light-emitting diode not emit light, and outputting the second light-emitting signal to make the second light-emitting diode emit light; wherein the second light-emitting signal is a periodic pulse signal, and the first light-emitting signal is a high potential signal.

[0014] In one embodiment, the outputting of the first light-emitting signal and the second light-emitting signal according to the light-emitting control signal, the first control signal, the second control signal and the preset potential includes: when the first control signal is at a low potential and the second control signal is at a high potential, outputting the first light-emitting signal to make the first light-emitting diode emit light, and outputting the second light-emitting signal to make the second light-emitting diode not emit light; wherein the first light-emitting signal is a periodic pulse signal, and the second light-emitting signal is a low potential signal; when the first control signal is at a high potential and the second control signal is at a low potential, outputting the first light-emitting signal to make the first light-emitting diode not emit light, and outputting the second light-emitting signal to make the second light-emitting diode emit light; wherein the second light-emitting signal is a periodic pulse signal, and the first light-emitting signal is a low potential signal.

[0015] In a third aspect, an embodiment of the present application further provides a display panel, comprising any of the light emitting control circuits described above.

[0016] The beneficial effects provided by the embodiments of the present application include at least:

[0017] An embodiment of the present application provides a light-emitting control circuit, a display panel and a light-emitting control method, wherein the light-emitting control circuit includes a plurality of cascaded light-emitting control sub-circuits, each light-emitting control sub-circuit corresponding to controlling a row of sub-pixels, each sub-pixel including a first light-emitting diode and a second light-emitting diode, and a light-emitting control unit outputs a first light-emitting signal and a second light-emitting signal according to a light-emitting control signal, a first control signal, a second control signal and a preset potential, and controls the opening and closing of the first light-emitting diode and the second light-emitting diode respectively, thereby effectively reducing the power consumption of the display panel and at least solving the problem that two light-emitting control circuits need to be provided for each row of sub-pixels in the anti-peep OLED display panel, and two light-emitting control signals need to be output respectively, resulting in high power consumption.

[0018] Other beneficial effects of the embodiments of the present application will be further described in the following specific implementation manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of a display panel provided in an optional embodiment of the present application;

[0020] Figure 2 is a schematic diagram of an anti-peeping pixel arrangement provided in an optional embodiment of the present application;

[0021] Figure 3 is a schematic diagram of a cascade structure of a light emitting control circuit provided in an optional embodiment of the present application;

[0022] Figure 4 is a schematic diagram of a cascade structure of another light emitting control circuit provided in an optional embodiment of the present application;

[0023] Figure 5 is a structural schematic diagram of a light emitting control subcircuit provided in an optional embodiment of the present application;

[0024] Figure 6 is a control timing diagram of a light emitting control unit provided in an optional embodiment of the present application;

[0025] Figure 7 It is a flow chart of a light emitting control method provided in an optional embodiment of the present application. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. The described technical solutions are only used to explain and illustrate the ideas of the present application and should not be regarded as limiting the scope of protection of the present application.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0028] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the various specific processes and material examples provided by the present application, but those of ordinary skill in the art can appreciate the application of other processes and / or the use of other materials.

[0030] When describing some embodiments, the expressions "coupled" and "connected" and their derivatives may be used. For example, when describing some embodiments, the term "connected" may be used to indicate that two or more components are in direct physical or electrical contact with each other. As another example, when describing some embodiments, the term "coupled" may be used to indicate that two or more components are in direct physical or electrical contact. However, the term "coupled" or "communicatively coupled" may also refer to two or more components that are not in direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents of the embodiments of the present application.

[0031] The various embodiments provided in this application are similar, and features in different embodiments may be combined with each other.

[0032] The use of "configured to" in the embodiments of the present application is meant to be open and inclusive language, which does not exclude devices adapted for or configured to perform additional tasks or steps.

[0033] The order of description of the following embodiments is not intended to limit the preferred order of the embodiments.

[0034] Reference Figure 1As shown, an embodiment of the present application provides a display panel 1000, which can be integrated in a display device, which can be a TV, a smart phone, a tablet computer, a laptop computer, a desktop computer, a smart speaker, a smart watch, etc., but is not limited thereto. A display panel refers to a component for displaying an image, which may include many pixel units, each of which may emit light, display a color, or reflect light to produce an image. The type of display panel can be set according to actual conditions. For example, the display panel may be a liquid crystal panel (LCD), an organic light-emitting diode panel (OLED), a mini light-emitting diode display panel (Mini-LED), or a micro light-emitting diode display panel (Micro-LED). The embodiments of the present application are not limited here. The pixel units included in the display panel may exist in the form of rows and / or columns.

[0035] The display panel 1000 includes an effective display area AA and a peripheral area NA located around the effective display area AA. A circuit board 1100 is provided in the peripheral area of ​​the display panel 1000 for providing a clock signal to the circuit inside the display panel 1000. The above-mentioned effective display area AA includes a plurality of sub-pixels 1500. For the convenience of explanation, the above-mentioned plurality of sub-pixels 1500 in the present application are described as an example of a matrix arrangement. In this case, the sub-pixels arranged in a row along the first direction (X direction) are called a row of sub-pixels, and the sub-pixels arranged in a row along the second direction (Y direction) are called a column of sub-pixels. A row of sub-pixels can be connected to a gate signal line GL and a light-emitting control signal line EM, and a column of sub-pixels can be connected to a data line DL, and the X direction intersects the Y direction perpendicularly.

[0036] Each sub-pixel 1500 may include a pixel driving circuit 1510 and a light emitting device (1520 and 1530). The light emitting device may emit at least three primary colors, such as red (Red, R), green (Green, G) and blue (Blue, B).

[0037] The pixel driving circuit 1510 , the gate driving circuit 1200 , and the data driving circuit 1300 in the embodiment of the present application can be implemented using any circuit in the art that can realize corresponding functions, and will not be elaborated on in detail.

[0038] The display panel 1000 also includes a gate driving circuit 1200, a data driving circuit 1300 and a light emitting control circuit 1400 arranged in the NA region. The gate driving circuit 1200 includes a plurality of cascaded gate driving sub-circuits 1210, and the light emitting control circuit 1400 includes a plurality of cascaded light emitting control sub-circuits 1410. Each column of sub-pixels is connected to the data driving circuit 1300 via at least one DL, each row of sub-pixels is connected to at least one gate driving sub-circuit 1210 via at least one GL, and each row of sub-pixels is connected to at least one light emitting control sub-circuit 1410 via at least one EM. It should be noted that, according to different circuit application scenarios, a row of sub-pixels can be connected to two or three or more gate driving sub-circuits via two or three or more GLs, and a row of sub-pixels can be connected to two or three or more light emitting control sub-circuits via two or three or more EMs. Figure 1 Only one signal line is used as an example for illustrative description, which is not intended to limit the scope of the present application.

[0039] For example, in some anti-peep OLED display panels, a sub-pixel is generally divided into two regions, and a light-emitting diode is set in each region. Figure 1 and Figure 2 As shown, each sub-pixel 1500 includes two light-emitting diodes. In the anti-peeping mode, one of the light-emitting diodes (for example, the first light-emitting diode 1520) emits light, and in the normal display mode, the other light-emitting diode (for example, the second light-emitting diode 1530) emits light. By setting some shielding layers, the visibility at a large viewing angle in the anti-peeping mode can be made weaker, thereby realizing the anti-peeping function. In the current related technology, generally one light-emitting control subcircuit 1410 controls one light-emitting diode. When one sub-pixel 1500 contains two light-emitting diodes, two light-emitting control subcircuits 1410 need to be set to output corresponding light-emitting signals respectively. Correspondingly, the setting of the clock signal line also needs to be doubled, which will increase the power consumption of the display panel, and at the same time increase the border area (border) and layout space, affecting the aesthetics of the display screen.

[0040] In order to solve the above technical problems, an embodiment of the present application provides a light emitting control circuit. Figure 1 and Figure 3As shown, the light emitting control circuit 1400 provided in the embodiment of the present application includes a plurality of cascaded light emitting control subcircuits (EM subcircuits) 1410, each of which controls a row of subpixels. For the sake of simplicity, the following signal ports and corresponding received or transmitted signals are described using the same symbols, for example, the first clock signal terminal and the first clock signal are both represented by CK, the second clock signal terminal and the second clock signal are both represented by XCK, the input terminal and the input signal are both represented by IN, and the output terminal and the output signal are both represented by OUT.

[0041] Each light-emitting control subcircuit 1410 includes: an input terminal IN, configured to receive an input signal IN (wherein the first-stage EM subcircuit receives a frame start signal STV); an output terminal OUT, connected to the light-emitting control unit and the input terminal of the next-stage light-emitting control subcircuit 1410, and the output terminal is configured to output a light-emitting control signal OUT; a light-emitting control unit 14100, connected to the light-emitting control signal OUT, the first control signal Control 1, the second control signal Control 2, and a preset potential (VGH or VGL). The light-emitting control unit 14100 is configured to output a first light-emitting signal EM 1 and a second light-emitting signal EM 2 according to the light-emitting control signal OUT, the first control signal Control 1, the second control signal Control 2, and the preset potential. Wherein, the first light-emitting signal EM 1 corresponds to controlling the first light-emitting diode 1520, and the second light-emitting signal EM 2 corresponds to controlling the second light-emitting diode 1530; the first control signal Control 1 and the second control signal Control 2 are inverted.

[0042] In the embodiment of the present application, a light-emitting control unit outputs a first light-emitting signal and a second light-emitting signal according to a light-emitting control signal, a first control signal, a second control signal and a preset potential, and controls the opening and closing of the first light-emitting diode and the second light-emitting diode respectively, thereby effectively reducing the power consumption of the display panel. At least the problem that two light-emitting control circuits need to be set for each row of sub-pixels in the anti-peep OLED display panel, and two light-emitting control signals are output respectively, resulting in high power consumption is solved. At the same time, layout space is saved and borders are reduced.

[0043] In one embodiment, the light emitting control subcircuit 1410 further includes a first clock signal terminal CK for receiving a first clock signal CK, and a second clock signal terminal XCK for receiving a second clock signal XCK, wherein the first clock signal CK and the second clock signal XCK are in anti-phase.

[0044] Reference Figure 4As shown, in one embodiment, the light control unit 14100 includes: a first control switch 14101, connected to the output terminal OUT and the second control switch 14102, and connected to the first control signal Control 1; a second control switch 14102, connected to the first control switch 14101 and the preset potential VGH, and connected to the second control signal Control 2; a third control switch 14103, connected to the output terminal OUT and the fourth control switch 14104, and connected to the second control signal Control 2; a fourth control switch 14104, connected to the third control switch 14103 and the preset potential VGH, and connected to the first control signal Control 1. A first node EM 1 is set between the first control switch 14101 and the second control switch 14102, and the first node EM 1 is configured to output the first light emitting signal EM 1; a second node EM 2 is set between the third control switch 14103 and the fourth control switch 14104, and the second node is configured to output the second light emitting signal EM 2.

[0045] It should be noted that the implementation of each unit and control switch in the light emitting control circuit may be a single transistor, a combination of multiple transistors, a capacitor, or a combination of a transistor and a capacitor. The transistors used in all embodiments of the present application may be thin film transistors (TFT), field effect transistors (MOS), or other devices with the same characteristics, and the embodiments of the present application do not limit this.

[0046] Exemplarily, the transistor may be a TFT. The TFT may be manufactured using an a-Si process, an oxide semiconductor process, a low temperature polysilicon (LTPS) process, or a high temperature polysilicon (HTPS) process. The embodiments of the present application are not limited thereto.

[0047] The embodiments of the present application do not limit the type of transistor. The transistor may be an N-type transistor, or a P-type transistor, or an enhancement-type transistor, or a depletion-type transistor. In the embodiments of the present application, the present application is exemplarily described by taking all transistors as P-type transistors as an example. The P-type transistor is turned on by a low-level voltage signal and turned off by a high-level voltage signal; that is, the operating voltage of the P-type transistor is a low-level voltage, and the turn-off voltage is a high-level voltage.

[0048] In the embodiments of the present application, the gate of the transistor is the control electrode. At the same time, in order to distinguish the two electrodes of the transistor other than the gate, one of the electrodes is directly described as the first electrode and the other electrode is the second electrode. At this time, the first electrode of the transistor can be one of the source and the drain of the transistor, and the second electrode can be the other of the source and the drain of the transistor. Since the source and the drain of the transistor can be symmetrical in structure, the source and the drain can be indistinguishable in structure.

[0049] The capacitor in the embodiment of the present application can be a capacitor device made separately through a process, for example, a capacitor device is realized by making a special capacitor electrode, and each capacitor electrode (first plate and second plate) of the capacitor can be realized by a metal layer, a semiconductor layer (such as doped polysilicon), etc. The capacitor can also be a parasitic capacitor between transistors, or realized by the transistor itself and other devices and circuits, or by using the parasitic capacitor between the circuits of the circuit itself.

[0050] Each of the above transistors may also include at least one switch connected in parallel with each of the transistors. The embodiments of the present application are merely examples of the pixel driving circuit and the gate driving circuit, and other structures with the same functions as the pixel driving circuit and the gate driving circuit are not described one by one, but should all fall within the protection scope of the present application.

[0051] The “first node”, “second node”, etc. in the embodiments of the present application do not represent actual existing components, but represent the junction points of related electrical connections in the circuit diagram. That is, these nodes are nodes formed by the equivalent junction points of related electrical connections in the circuit diagram.

[0052] Reference Figure 5 As shown, in one embodiment, the first control switch 14101 includes a first PMOS tube T17, the second control switch 14102 includes a second PMOS tube T16, the third control switch 14103 includes a third PMOS tube T14, the fourth control switch 14104 includes a fourth PMOS tube T15, and the preset potential VGH is a preset high potential.

[0053] Reference Figure 6As shown, when the first control signal Control 1 is at a low potential and the second control signal Control 2 is at a high potential, T15 and T17 are turned on, T14 and T16 are turned off, the first node EM 1 outputs a periodic pulse signal, the second node EM 2 outputs a high potential signal, the first light-emitting diode emits light normally, and the second light-emitting diode does not emit light. When the first control signal Control 1 is at a high potential and the second control signal Control 2 is at a low potential, T15 and T17 are turned off, T14 and T16 are turned on, the second node EM 2 outputs a periodic pulse signal, the first node EM 1 outputs a high potential signal, the first light-emitting diode does not emit light, and the second light-emitting diode emits light normally.

[0054] Continue to refer to Figure 5 As shown, in one embodiment, the light emitting control subcircuit further includes: a coupling pull-down unit (including T1, T2 and C1), connected to the first clock signal CK and the preset high potential VGH, electrically connected to the third node C and the fourth node Q, and the coupling pull-down unit is configured to control the potential of the third node C and the fourth node Q according to the first clock signal CK and the preset high potential VGH. A signal input unit (including T3), connected to the input signal IN and the second clock signal XCK, connected to the fifth node D, the signal input unit is configured to receive the input signal IN, and transmit the input signal IN to the fifth node D according to the second clock signal XCK. A signal output unit (including T9 and T10), connected to the preset high potential VGH and the preset low potential VGL, connected to the fourth node Q, the sixth node P and the output terminal OUT, the signal output unit is configured to control the conduction or disconnection between the preset high potential VGH and the output terminal OUT through T10, and control the conduction or disconnection between the preset low potential VGL and the output terminal OUT through T9.

[0055] In one embodiment, the light-emitting control subcircuit also includes: a high-voltage output maintaining unit (including T4, T5, T6 and T7), which is connected to the first clock signal CK, the second clock signal XCK and the preset low voltage VGL, and connects the third node C, the fifth node D and the sixth node P. The high-voltage output maintaining unit is configured to control the voltage of the sixth node P according to the first clock signal CK, the second clock signal XCK and the preset low voltage VGL.

[0056] In one embodiment, the above-mentioned light-emitting control subcircuit also includes: a coupling pull-up unit (including C2) for coupling the potential between point A and point B; an ultra-low potential blocking unit (including T11 and T12) for blocking VGL; an initialization unit (including T13) for receiving an initial control signal Control; a voltage stabilizing unit (C3) for stabilizing the voltage difference between the gate and source of T10 to prevent breakdown; an output short-circuit prevention module (including T8) connected to a preset high potential VGH and connected to the first node Q and the second node P to prevent a short circuit between the first node Q and the second node P.

[0057] It should be noted that Figure 5 The circuit shown and Figure 6 The timings shown are all illustrative descriptions using PMOS tubes as an example. If all MOS tubes in the light-emitting control subcircuit are replaced with NMOS tubes, the high and low relationships of all signals need to be reversed, the pull-up control is changed to the pull-down control, the preset high potential VGH is changed to the preset low potential VGL, and the preset low potential VGL is changed to the preset high potential VGH.

[0058] For example, in one embodiment, in the above-mentioned light-emitting control subcircuit 1410, the first control switch 14101 includes a first NMOS transistor, the second control switch 14102 includes a second NMOS transistor, the third control switch 14103 includes a third NMOS transistor, and the fourth control switch 14104 includes a fourth NMOS transistor, and the preset potential is a preset low potential; wherein, when the first control signal Control 1 is a high potential and the second control signal Control 2 is a low potential, T15 and T17 are turned on, T14 and T16 are turned off, the first light-emitting signal EM 1 output by the first node is a periodic pulse signal, and the second light-emitting signal EM 2 output by the second node is a low potential signal; when the first control signal Control 1 is a low potential and the second control signal Control 2 is a high potential, T15 and T17 are turned off, T14 and T16 are turned on, the second light-emitting signal EM 2 output by the second node is a periodic pulse signal, and the first light-emitting signal EM 1 output by the first node is a low potential signal.

[0059] Correspondingly, the light-emitting control subcircuit 1410 also includes: a coupling pull-up unit (including T1, T2 and C1), connected to the first clock signal and the preset low potential, electrically connected to the third node C and the fourth node Q, and the coupling pull-up unit is configured to control the potential of the third node C and the fourth node Q according to the first clock signal and the preset low potential; a signal input unit (including T3), connected to the input signal and the second clock signal, connected to the fifth node D, the signal input unit is configured to receive the input signal and transmit the input signal to the fifth node according to the second clock signal; a signal output unit (including T9 and T10), connected to the preset low potential and the preset high potential, connected to the fourth node Q, the sixth node P and the output end, the signal output unit is configured to control the conduction or disconnection between the preset low potential and the output end through T10, and control the conduction or disconnection between the preset high potential and the output end through T9.

[0060] In one embodiment, the light-emitting control subcircuit also includes: a low-voltage output maintaining unit (including T4, T5, T6 and T7), which is connected to the first clock signal, the second clock signal and the preset high voltage, and connects the third node C, the fifth node D and the sixth node P. The low-voltage output maintaining unit is configured to control the voltage of the sixth node P according to the first clock signal, the second clock signal and the preset high voltage.

[0061] According to another embodiment of the present application, a light emitting control method is also provided, which is applied to the light emitting control circuit of any of the above embodiments, and the contents already described are not repeated here. Figure 7 As shown, the method includes:

[0062] Step S701, outputting the first light-emitting signal and the second light-emitting signal according to the light-emitting control signal, the first control signal, the second control signal and the preset potential; wherein the first light-emitting signal corresponds to controlling the first light-emitting diode, and the second light-emitting signal corresponds to controlling the second light-emitting diode; the first control signal and the second control signal are inverted.

[0063] In one embodiment, if the light emitting control circuit is implemented by a PMOS tube, the above step S701 can be implemented by the following steps:

[0064] When the first control signal is at a low potential and the second control signal is at a high potential, a first light-emitting signal is output to make the first light-emitting diode emit light, and a second light-emitting signal is output to make the second light-emitting diode not emit light; wherein the first light-emitting signal is a periodic pulse signal, and the second light-emitting signal is a high potential signal;

[0065] When the first control signal is at a high potential and the second control signal is at a low potential, a first light-emitting signal is output to make the first light-emitting diode non-luminous, and a second light-emitting signal is output to make the second light-emitting diode luminous; wherein the second light-emitting signal is a periodic pulse signal and the first light-emitting signal is a high potential signal.

[0066] In one embodiment, if the light emitting control circuit is implemented by an NMOS transistor, the above step S701 can be implemented by the following steps:

[0067] When the first control signal is at a high potential and the second control signal is at a low potential, a first light-emitting signal is output to make the first light-emitting diode emit light, and a second light-emitting signal is output to make the second light-emitting diode not emit light; wherein the first light-emitting signal is a periodic pulse signal, and the second light-emitting signal is a low potential signal;

[0068] When the first control signal is at a low potential and the second control signal is at a high potential, a first light-emitting signal is output to make the first light-emitting diode non-luminous, and a second light-emitting signal is output to make the second light-emitting diode luminous; wherein the second light-emitting signal is a periodic pulse signal and the first light-emitting signal is a low potential signal.

[0069] In the embodiment of the present application, a light-emitting control unit outputs a first light-emitting signal and a second light-emitting signal according to a light-emitting control signal, a first control signal, a second control signal and a preset potential, and controls the opening and closing of the first light-emitting diode and the second light-emitting diode respectively, thereby effectively reducing the power consumption of the display panel. At least the problem that two light-emitting control circuits need to be set for each row of sub-pixels in the anti-peep OLED display panel, and two light-emitting control signals are output respectively, resulting in high power consumption is solved. At the same time, layout space is saved and borders are reduced.

[0070] In the embodiments of the present application, specific examples are used to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

[0071] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that a person skilled in the art can think of within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A light emitting control circuit, characterized in that: The light emitting control circuit includes a plurality of cascaded light emitting control subcircuits, each of which controls a row of sub-pixels, each of which includes a first light emitting diode and a second light emitting diode, and each of which includes: an input terminal configured to receive an input signal; An output end, connected to the light emitting control unit and the input end of the light emitting control sub-circuit of the next level, the output end being configured to output a light emitting control signal; The light emitting control unit is connected to the light emitting control signal, the first control signal, the second control signal and the preset potential, and the light emitting control unit is configured to output the first light emitting signal and the second light emitting signal according to the light emitting control signal, the first control signal, the second control signal and the preset potential; The first light emitting signal controls the first light emitting diode, and the second light emitting signal controls the second light emitting diode; the first control signal and the second control signal are in antiphase.

2. The light emitting control circuit according to claim 1, characterized in that: The light emitting control unit comprises: A first control switch, connected to the output end and the second control switch, and receiving the first control signal; The second control switch is connected to the first control switch and receives the second control signal and the preset potential; a third control switch, connected to the output end and the fourth control switch, and receiving the second control signal; The fourth control switch is connected to the third control switch and receives the first control signal and the preset potential; A first node is set between the first control switch and the second control switch, and the first node is configured to output the first light-emitting signal; a second node is set between the third control switch and the fourth control switch, and the second node is configured to output the second light-emitting signal.

3. The light emitting control circuit according to claim 2, characterized in that: The first control switch includes a first PMOS transistor, the second control switch includes a second PMOS transistor, the third control switch includes a third PMOS transistor, the fourth control switch includes a fourth PMOS transistor, and the preset potential is a preset high potential; Among them, when the first control signal is at a low potential and the second control signal is at a high potential, the first node outputs a periodic pulse signal and the second node outputs a high potential signal; when the first control signal is at a high potential and the second control signal is at a low potential, the second node outputs a periodic pulse signal and the first node outputs a high potential signal.

4. The light emitting control circuit according to claim 3, characterized in that: The light emitting control subcircuit further includes: A coupling pull-down unit is connected to the first clock signal and the preset high potential, and is electrically connected to the third node and the fourth node, wherein the coupling pull-down unit is configured to control the potential of the third node and the fourth node according to the first clock signal and the preset high potential; A signal input unit, connected to the input signal and the second clock signal, connected to the fifth node, the signal input unit is configured to receive the input signal and transmit the input signal to the fifth node according to the second clock signal; A signal output unit is connected to the preset high potential and the preset low potential, and connects the fourth node, the sixth node and the output end. The signal output unit is configured to control the conduction or disconnection between the preset high potential and the output end, and to control the conduction or disconnection between the preset low potential and the output end.

5. The light emitting control circuit according to claim 4, characterized in that: The light emitting control subcircuit further includes: A high potential output maintaining unit is connected to the first clock signal, the second clock signal and the preset low potential, and connects the third node, the fifth node and the sixth node. The high potential output maintaining unit is configured to control the potential of the sixth node according to the first clock signal, the second clock signal and the preset low potential.

6. The light emitting control circuit according to claim 2, characterized in that: The first control switch includes a first NMOS transistor, the second control switch includes a second NMOS transistor, the third control switch includes a third NMOS transistor, the fourth control switch includes a fourth NMOS transistor, and the preset potential is a preset low potential; Among them, when the first control signal is a high potential and the second control signal is a low potential, the first light-emitting signal output by the first node is a periodic pulse signal, and the second light-emitting signal output by the second node is a low potential signal; when the first control signal is a low potential and the second control signal is a high potential, the second light-emitting signal output by the second node is a periodic pulse signal, and the first light-emitting signal output by the first node is a low potential signal.

7. The light emitting control circuit according to claim 6, characterized in that: The light emitting control subcircuit further includes: A coupling pull-up unit is connected to the first clock signal and the preset low potential, and connects the third node and the fourth node, wherein the coupling pull-up unit is configured to control the potential of the third node and the fourth node according to the first clock signal and the preset low potential; A signal input unit, connected to the input signal and the second clock signal, connected to the fifth node, the signal input unit is configured to receive the input signal and transmit the input signal to the fifth node according to the second clock signal; A signal output unit is connected to the preset low potential and the preset high potential, and connects the fourth node, the sixth node and the output end. The signal output unit is configured to control the conduction or disconnection between the preset low potential and the output end, and to control the conduction or disconnection between the preset high potential and the output end.

8. The light emitting control circuit according to claim 7, characterized in that: The light emitting control subcircuit further includes: A low potential output maintaining unit is connected to the first clock signal, the second clock signal and the preset high potential, and connects the third node, the fifth node and the sixth node. The low potential output maintaining unit is configured to control the potential of the sixth node according to the first clock signal, the second clock signal and the preset high potential.

9. A light emitting control method, applied to the light emitting control circuit according to any one of claims 1 to 8, characterized in that: The method comprises: Outputting a first light-emitting signal and a second light-emitting signal according to the light-emitting control signal, the first control signal, the second control signal and the preset potential; The first light emitting signal controls the first light emitting diode, and the second light emitting signal controls the second light emitting diode; the first control signal and the second control signal are in antiphase.

10. The light emission control method according to claim 9, characterized in that: Outputting the first light-emitting signal and the second light-emitting signal according to the light-emitting control signal, the first control signal, the second control signal and the preset potential comprises: When the first control signal is at a low potential and the second control signal is at a high potential, the first light-emitting signal is output to make the first light-emitting diode emit light, and the second light-emitting signal is output to make the second light-emitting diode not emit light; wherein the first light-emitting signal is a periodic pulse signal, and the second light-emitting signal is a high potential signal; When the first control signal is at a high potential and the second control signal is at a low potential, the first light-emitting signal is output to make the first light-emitting diode non-luminous, and the second light-emitting signal is output to make the second light-emitting diode illuminate; wherein the second light-emitting signal is a periodic pulse signal and the first light-emitting signal is a high potential signal.

11. The light emission control method according to claim 9, characterized in that: Outputting the first light-emitting signal and the second light-emitting signal according to the light-emitting control signal, the first control signal, the second control signal and the preset potential comprises: When the first control signal is at a high potential and the second control signal is at a low potential, the first light-emitting signal is output to make the first light-emitting diode emit light, and the second light-emitting signal is output to make the second light-emitting diode not emit light; wherein the first light-emitting signal is a periodic pulse signal, and the second light-emitting signal is a low potential signal; When the first control signal is at a low potential and the second control signal is at a high potential, the first light-emitting signal is output to make the first light-emitting diode non-luminous, and the second light-emitting signal is output to make the second light-emitting diode luminous; wherein the second light-emitting signal is a periodic pulse signal and the first light-emitting signal is a low potential signal.

12. A display panel, characterized in that: The light emitting control circuit comprises the light emitting control circuit according to any one of claims 1 to 8.

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