CN113628594B - Light-emitting substrate, driving method thereof and display device - Google Patents
Light-emitting substrate, driving method thereof and display device Download PDFInfo
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- CN113628594B CN113628594B CN202111126824.XA CN202111126824A CN113628594B CN 113628594 B CN113628594 B CN 113628594B CN 202111126824 A CN202111126824 A CN 202111126824A CN 113628594 B CN113628594 B CN 113628594B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/04—Display protection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The application discloses a light-emitting substrate, a driving method thereof and a display device, which are used for prolonging the service life of a light source. The embodiment of the application provides a light-emitting substrate, which comprises a plurality of light-emitting units arranged in an array; each of the light emitting units includes: the device comprises a light source, a first driving module coupled with the light source and a light source protection circuit connected with the light source in parallel; the first driving module is used for supplying power to the light source; the light source protection circuit is used for: storing electrical energy between the first and second ends of the light source before the first driving module stops powering the light source, and discharging electricity to the first and second ends of the light source when the first driving module stops powering the light source.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a light emitting substrate, a driving method thereof, and a display device.
Background
With the rapid development of Mini light emitting diode (Mini LED) display technology, mini LED display products have begun to be applied to ultra-large screen high definition displays.
The traditional Mini LED backlight application can meet the requirement of block circuit adjustment through a main board Micro Control Unit (MCU), and the brightness and the partition matching is carried out through a brightness duty ratio adjusting signal (PWR) signal and a diode IC serial signal (ADDR), so that the requirement of linkage with a display panel under the condition of ultrahigh refreshing of the PWR signal is met, and the requirement of higher black-white contrast is met; however, in the display process of the Mini LED as the backlight, the Mini LED performs brightness adjustment through high frequency refreshing of the PWR, but at the moment of shutdown, the Mini LED may flash off, different Mini LEDs may be in different brightness conditions, and different damages are caused to a single Mini LED chip in the flashing off process, which affects the service life of the Mini LED, and further affects the service life of the backlight module and the display device.
Disclosure of Invention
The embodiment of the application provides a light-emitting substrate, a driving method thereof and a display device, which are used for prolonging the service life of a light source.
The embodiment of the application provides a light-emitting substrate, which comprises a plurality of light-emitting units arranged in an array; each of the light emitting cells includes: the device comprises a light source, a first driving module coupled with the light source and a light source protection circuit connected with the light source in parallel;
the first driving module is used for supplying power to the light source;
the light source protection circuit is used for: storing electrical energy between the first and second ends of the light source before the first driving module stops powering the light source, and discharging electricity to the first and second ends of the light source when the first driving module stops powering the light source.
In some embodiments, the light source protection circuit includes: a switch module and a storage module;
the control end of the switch module is coupled with the starting signal end, the first end of the switch module is coupled with the first end of the light source, and the second end of the switch module is coupled with the first end of the storage module; the second end of the storage module is coupled with the second end of the light source.
In some embodiments, a switch module comprises: a first transistor;
the control stage of the first transistor is coupled to the start signal terminal, the first stage of the first transistor is coupled to the first terminal of the light source, and the second stage of the first transistor is coupled to the first terminal of the memory module.
In some embodiments, the memory module comprises: a first capacitor;
the first stage of the first capacitor is coupled to the second terminal of the switch module, and the second stage of the first capacitor is coupled to the second terminal of the light source.
In some embodiments, the first output terminal of the first driving module is coupled to the first terminal of the light source, the second output terminal of the first driving module is coupled to the second terminal of the light source, the first input terminal of the first driving module is configured to receive the luminance duty cycle adjustment signal, and the second input terminal of the first driving module is configured to receive the light emission control signal;
the first drive module is configured to: and supplying power to the light source in response to the brightness duty cycle adjustment signal and the light emission control signal.
In some embodiments, the light emitting substrate further comprises: a second driving module;
the second driving module is used for: providing a brightness duty ratio adjusting signal and a light-emitting control signal to a first driving module; and responding to the shutdown signal, generating a starting signal and outputting the starting signal to the control end of the switch module.
In some embodiments, the plurality of light emitting cells includes a plurality of light emitting cell columns extending in the first direction and arranged in the second direction;
the light emitting substrate further includes: a plurality of turn-on signal lines corresponding to the light-emitting unit rows one to one; the starting signal line is coupled with the second driving module and the control end of the switch module;
the switch modules in the light-emitting units in the same light-emitting unit column are coupled with the same starting signal line.
In some embodiments, the light source comprises: a plurality of mini light emitting diodes connected in series.
An embodiment of the present application provides a method for driving the light-emitting substrate, where the method includes:
a light emitting stage, wherein power is supplied to the light source through the first driving module;
in the charging stage, the first driving module keeps supplying power to the light source, and the light source protection circuit stores electric energy between the first end and the second end of the light source;
and in the power-off stage, the first driving module stops supplying power to the light source, and the light source protection circuit discharges power to the first end and the second end of the light source.
In some embodiments, the supplying power to the light source through the first driving module specifically includes:
and providing a brightness duty ratio adjusting signal and a light-emitting control signal for the first driving module, and supplying power to the light source through the first driving module according to the brightness duty ratio adjusting signal and the light-emitting control signal.
In some embodiments, a light source protection circuit includes a switch module and a memory module; in the charging stage, the electric energy between the first end and the second end of the light source is stored through the light source protection circuit, and the method specifically comprises the following steps:
in the charging stage, a starting signal is provided for the control end of the switch module, and the switch module is controlled to be conducted, so that the storage module stores electric energy between the first end and the second end of the light source;
in the power-off stage, the first end and the second end of the light source are discharged through the light source protection circuit, and the method specifically comprises the following steps:
and in the power-off stage, the control end of the switch module is kept to provide a starting signal, and the switch module is controlled to be conducted, so that the storage module discharges to the first end and the second end of the light source.
In some embodiments, the light emitting substrate further comprises a second driving module; the stage of charging, to the control end of switch module, control switch module switches on, specifically includes:
and transmitting a shutdown signal to the second driving module, generating a starting signal according to the shutdown signal through the second driving module, and transmitting the starting signal to the control end of the switch module to control the switch-on of the switch module.
The display device provided by the embodiment of the application comprises the light-emitting substrate provided by the embodiment of the application.
According to the light-emitting substrate, the driving method thereof and the display device, the light source protection circuit comprises the switch module and the storage module, the switch module can enable the storage module to be conducted with the light source only under the conditions that the storage module is required to be used for storing electric energy at two ends of the power source and the storage module is required to be used for discharging electricity at two ends of the light source, and the storage module and one end of the light source can be controlled to be disconnected in the normal lighting stage of the light source. Thereby preventing the increase of power consumption of the light emitting substrate while protecting the light source.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic view of a light-emitting substrate according to an embodiment of the present disclosure;
fig. 2 is a schematic view of another light-emitting substrate provided in an embodiment of the present application;
fig. 3 is a schematic flow chart illustrating a driving method of a light emitting substrate according to an embodiment of the present disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be described clearly and completely in the following with reference to the drawings of the embodiments of the present application. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. And the embodiments and features of the embodiments in the present application may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the application without any inventive step, are within the scope of protection of the application.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. As used in this application, the terms "first," "second," and the like, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item preceding the word comprises the element or item listed in the word and its equivalent, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
It should be noted that the sizes and shapes of the figures in the drawings are not to scale, but are merely for illustrative purposes. And like reference numerals refer to like or similar elements or elements having like or similar functions throughout.
The embodiment of the present application provides a light emitting substrate, as shown in fig. 1, including a plurality of light emitting units 1 arranged in an array; each light emitting unit 1 includes: the light source protection circuit comprises a light source 2, a first driving module 3 coupled with the light source 2, and a light source protection circuit 4 connected with the light source 2 in parallel;
the first driving module 3 is used for supplying power to the light source 2;
the light source protection circuit 4 is configured to: storing electrical energy between the first and second ends of the light source 2 before the first driving module 3 stops supplying power to the light source 2, and discharging electrical energy to the first and second ends of the light source 2 when the first driving module 3 stops de-energizing the light source 2.
The embodiment of the application provides a light-emitting substrate, owing to include the light source protection circuit parallelly connected with the light source, before first drive module stops to the light source power supply, the electric energy at light source protection circuit storage light source both ends, and discharge to the light source both ends when first drive module stops to the light source power supply, make light source luminance slowly reduce, protect the light source, thereby can avoid the light source to flash out, avoid the impact of fast outage to the light source, prolong the life-span of light source, and then improve light-emitting substrate's life.
In some embodiments, as shown in fig. 1, the light source protection circuit 4 includes: a switch module 5, and a memory module 6;
the control end of the switch module 5 is used for receiving the turn-on signal SW, the first end of the switch module 5 is coupled to the first end of the light source 2, and the second end of the switch module 5 is coupled to the first end of the storage module 6; a second end of the memory module 6 is coupled to a second end of the light source 2.
In particular implementation, the switch module is configured to: and the storage module is conducted before the first driving module stops supplying power to the light source and when the first driving module stops supplying power to the light source, so that the storage module is conducted with the light source. The switch module is further configured to: and the light source is cut off in the normal lighting stage of the light source, so that the storage module and the light source are disconnected. The storage module is used for: the electric energy at the two ends of the light source is stored before the first driving module stops supplying power to the light source, and the electric energy is discharged to the two ends of the light source when the first driving module stops supplying power to the light source.
It should be noted that, in specific implementation, the first driving module provides a first voltage signal to the first end of the light source and provides a second voltage signal to the second end of the light source, and a voltage difference exists between the first voltage signal and the second voltage signal.
According to the light-emitting substrate provided by the embodiment of the application, the light source protection circuit comprises the switch module and the storage module, the switch module can only enable the storage module to be conducted with the light source under the condition that the storage module is required to be used for storing electric energy at two ends of the power supply and the storage module is required to be used for discharging electricity at two ends of the light source, and the storage module and one end of the light source can be controlled to be disconnected in the normal lighting stage of the light source. Thereby preventing an increase in power consumption of the light emitting substrate while protecting the light source.
In some embodiments, as shown in fig. 2, the switch module 5 comprises: a first transistor T1;
the control stage of the first transistor T1 is configured to receive a start signal, the first stage of the first transistor T1 is coupled to the first terminal of the light source 2, and the second stage of the first transistor T1 is coupled to the first terminal of the memory module 6.
In some embodiments, the transistor may be, for example, a thin film transistor or a metal semiconductor field effect transistor. The transistor may be a P-type transistor or an N-type transistor.
In some embodiments, as shown in fig. 2, the storage module 6 includes: a first capacitor C1;
the first stage of the first capacitor C1 is coupled to the second terminal of the switch module 5, and the second stage of the first capacitor C1 is coupled to the second terminal of the light source 2.
In a specific implementation, as shown in fig. 2, the first stage of the first capacitor C1 is coupled to the second stage of the first transistor T1.
In some embodiments, as shown in fig. 1 and fig. 2, a first output terminal of the first driving module 3 is coupled to a first terminal of the light source 2, a second output terminal of the first driving module 3 is coupled to a second terminal of the light source 2, a first input terminal of the first driving module 3 is configured to receive the brightness duty ratio adjustment signal PWR, and a second input terminal of the first driving module 3 is configured to receive the light emission control signal ADDR;
the first drive module is configured to: the light source 2 is supplied with power in response to the brightness duty ratio adjustment signal PWR and the light emission ADDR.
In specific implementation, the first driving module provides different pulse wave bands to the light source according to the received brightness duty ratio adjusting signal PWR and the light emitting control signal ADDR, and enables the light source to reach specified brightness within specified time, so that the function of controlling the brightness of a plurality of light emitting units of the light emitting substrate in blocks is realized, and when the light emitting substrate is applied to a display product, the black-white contrast of the display product can be improved.
In specific implementation, when the brightness of the light source is changed at high frequency, the overall temperature of the light source is increased, and the service life of the light source is more easily reduced when the power is quickly cut off under high temperature conditions. The embodiment of the application provides a light-emitting substrate, light source protection circuit can make light source luminance slowly reduce, the temperature slowly reduces, protects the light source, avoids the impact of fast outage to the light source, prolongs the life-span of light source, and then improves light-emitting substrate's life.
In some embodiments, as shown in fig. 2, the light emitting substrate further comprises: a second drive module 11;
the second driving module 11 is configured to: providing the brightness duty ratio adjustment signal PWR and the light emission control signal ADDR to the first driving module 3; in response to the shutdown signal, the on signal SW is generated and output to the control terminal of the switch module 5.
In some embodiments, as shown in fig. 2, the plurality of light emitting cells includes a plurality of light emitting cell columns 12 extending in the first direction Y and arranged in the second direction X;
the light emitting substrate further includes: a plurality of on signal lines 7 corresponding one-to-one to the light emitting cell rows 12; the starting signal line 7 is coupled with the second driving module 11 and the control end of the switch module 5;
the switch modules 5 in the light emitting units 1 in the same light emitting unit column 12 are coupled to the same turn-on signal line 7.
Fig. 2 shows only 1 light-emitting cell row 12. In fig. 2, the control stage of each first transistor T1 in a row of light emitting cells is coupled to the second driving module 11 through the turn-on signal line 7.
In some embodiments, as shown in fig. 2, the light emitting substrate further comprises: a plurality of luminance duty ratio adjustment signal lines 8 corresponding to the light emitting unit rows 12 one to one, and a plurality of light emission control signal lines 10 corresponding to the light emitting unit rows 12 one to one; the brightness duty ratio adjusting signal line 8 is coupled with the second driving module 11 and the first driving module 3, and the light emitting control signal line 10 is coupled with the second driving module 11 and the first driving module 3;
the first driving modules 3 in the light emitting units 1 in the same light emitting unit row 12 are coupled to the same luminance duty ratio adjustment signal line 8, and the first driving modules 3 in the light emitting units 1 in the same light emitting unit row 12 are coupled to the same light emitting control signal line 10.
In some embodiments, as shown in fig. 2, the light emitting substrate further includes a plurality of ground level signal lines 9 in one-to-one correspondence with the light emitting cell columns 12; the ground level signal line 9 is coupled with the second driving module 11 and the first driving module 3; the first driving modules 3 in the plurality of light emitting cells 1 located in the same light emitting cell column 12 are coupled to the same ground level signal line 9.
In specific implementation, the second driving module is further configured to provide a ground level signal GND to the first driving module through the ground level signal line, so as to supply power to the first driving module.
In a specific implementation, in a light emitting stage of the light source and when the second driving module does not receive the shutdown signal, the second driving module provides the brightness duty ratio adjusting signal PWR, the light emitting control signal ADDR and the ground level signal GND to the first driving module 3, so that the first driving module supplies power to the light source according to the brightness duty ratio adjusting signal PWR and the light emitting control signal ADDR. When the second driving module receives the shutdown signal, the second driving module provides a turn-on signal SW to the control end of the switch module, so that the storage module in the power protection circuit stores the electric energy at the two ends of the light source. And then the second driving module stops providing the brightness duty ratio adjusting signal PWR, the light-emitting control signal ADDR and the ground level signal GND, and when the first driving module stops supplying power to the light source, the second driving module keeps providing the opening signal SW to the control end of the switch module so that the storage module discharges to the two ends of the light source until the brightness of the light source slowly becomes dark.
In some embodiments, the first driving module includes an Integrated Circuit (IC) chip. The second driving circuit includes a Microcontroller Unit (MCU).
In some embodiments, the light source comprises: mini light emitting diodes (Mini LED).
In some embodiments, the light source comprises a mini light emitting diode. Alternatively, in some embodiments, as shown in fig. 1 and 2, the light source 2 includes: a plurality of mini leds 13 connected in series.
In fig. 1 and 2, the light source including 3 mini light emitting diodes 13 connected in series is illustrated as an example. In practical implementation, the number of the mini light emitting diodes included in the light source can be selected according to actual needs.
In some embodiments, the light emitting substrate further comprises a substrate base. The base substrate may be, for example, a glass substrate.
In specific implementation, the first transistor and the first capacitor in the light source protection circuit can be directly manufactured on the glass substrate, so that the manufacturing difficulty of the light source protection circuit can be reduced.
In a specific implementation, a driving circuit of the light source may be fabricated on the base substrate, and then the Mini LED may be fixed on the base substrate on which the driving circuit is fabricated by a thin film diffusion technique. The driving circuit may include various types of signal lines such as a luminance duty ratio adjustment signal line, a light emission control signal line, a ground level signal line, and the like. The first transistor, the first capacitor and the starting signal line in the light source protection circuit can be manufactured in the same layer with the conducting layer in the driving circuit, so that the manufacturing difficulty of the light source protection circuit is further reduced, and the cost is saved.
Based on the same inventive concept, an embodiment of the present application further provides a method for driving the light emitting substrate, as shown in fig. 3, including:
s101, in a light emitting stage, power is supplied to a light source through a first driving module;
s102, in a charging stage, power supply to the light source is kept through the first driving module, and electric energy between the first end and the second end of the light source is stored through the light source protection circuit;
and S103, in a power-off stage, the first driving module stops supplying power to the light source, and the light source protection circuit discharges power to the first end and the second end of the light source.
The luminous base plate that this application embodiment provided stops the charging phase before supplying power to the light source at first drive module, through the electric energy at light source protection circuit storage light source both ends to at the outage phase, discharge to the light source both ends through light source protection circuit, make light source luminance slowly reduce, protect the light source, thereby can avoid the light source to flash out, avoid the impact of quick outage to the light source, prolong the life-span of light source, and then improve luminous base plate's life.
In some embodiments, supplying power to the light source through the first driving module specifically includes:
and the first driving module supplies power to the light source according to the brightness duty ratio adjusting signal and the light-emitting control signal.
In some embodiments, a light source protection circuit includes a switch module and a memory module; in the charging stage, the electric energy between the first end and the second end of the light source is stored through the light source protection circuit, and the method specifically comprises the following steps:
in the charging stage, a starting signal is provided for the control end of the switch module, and the switch module is controlled to be conducted, so that the storage module stores electric energy between the first end and the second end of the light source;
in the power-off stage, the first end and the second end of the light source are discharged through the light source protection circuit, and the method specifically comprises the following steps:
and in the power-off stage, the control end of the switch module is kept to provide a starting signal, and the switch module is controlled to be conducted so as to enable the storage module to discharge to the first end and the second end of the light source.
In some embodiments, the light emitting substrate further comprises a second driving module; the stage of charging provides the turn-on signal to switch module's control end, and control switch module switches on, specifically includes:
and transmitting a shutdown signal to the second driving module, generating a starting signal according to the shutdown signal through the second driving module, and transmitting the starting signal to the control end of the switch module to control the switch module to be switched on.
In some embodiments, in the power-off phase, the step of keeping providing the turn-on signal to the control terminal of the switch module to control the switch module to be turned on includes:
the second driving module keeps the talk-back starting signal to be sent to the control end of the switch module, and the switch module is controlled to be conducted.
Based on the same inventive concept, the display device provided by the embodiment of the present application includes the light emitting substrate provided by the embodiment of the present application.
In some embodiments, the display device further comprises a display panel positioned at the light-emitting side of the light-emitting substrate. The display panel may be, for example, a liquid crystal display panel.
In some embodiments, the display device further comprises a shutdown module. The shutdown module is coupled with the second driving module and used for providing a shutdown signal for the second driving module.
In a specific implementation, the shutdown module may include, for example, a shutdown key, that is, when a user presses the shutdown key, the shutdown signal is transmitted to the second driving module, and the second driving module generates a start signal according to the shutdown signal and transmits the start signal to the light source protection circuit through the start signal line, so as to trigger the light source protection circuit to protect the light source.
The display device provided by the embodiment of the application is as follows: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. Other essential components of the display device are understood by those skilled in the art, and are not described herein or should not be construed as limiting the present application. The implementation of the display device can be seen in the above embodiments of the light emitting substrate, and repeated descriptions are omitted.
To sum up, according to the light-emitting substrate, the driving method thereof and the display device provided by the embodiment of the present application, the light source protection circuit includes the switch module and the storage module, the switch module can only enable the storage module to be conducted with the light source under the condition that the storage module is required to store electric energy at two ends of the power supply and the storage module is required to discharge electricity to two ends of the light source, and the storage module and one end of the light source can be controlled to be disconnected at the stage of normal lighting of the light source. Thereby preventing the increase of power consumption of the light emitting substrate while protecting the light source.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (11)
1. The light-emitting substrate is characterized by comprising a plurality of light-emitting units arranged in an array; each of the light emitting units includes: the light source, with the first drive module of light source coupling, and with the light source protection circuit of light source parallel connection, the light source protection circuit includes: a switch module and a storage module;
the first driving module is used for supplying power to the light source;
the light source protection circuit is used for: storing electrical energy between the first and second ends of the light source before the first driving module stops supplying power to the light source, and discharging the first and second ends of the light source when the first driving module stops supplying power to the light source;
the control end of the switch module is used for receiving a starting signal, the first end of the switch module is coupled with the first end of the light source, and the second end of the switch module is coupled with the first end of the storage module; a second end of the memory module is coupled with a second end of the light source.
2. The light-emitting substrate according to claim 1, wherein the switch module comprises: a first transistor;
the control stage of the first transistor is used for receiving the starting signal, the first stage of the first transistor is coupled with the first end of the light source, and the second stage of the first transistor is coupled with the first end of the storage module.
3. The light-emitting substrate according to claim 1, wherein the memory module comprises: a first capacitor;
the first stage of the first capacitor is coupled to the second terminal of the switch module, and the second stage of the first capacitor is coupled to the second terminal of the light source.
4. The lighting substrate according to any one of claims 1 to 3, wherein a first output terminal of the first driving module is coupled to a first terminal of the light source, a second output terminal of the first driving module is coupled to a second terminal of the light source, a first input terminal of the first driving module is configured to receive a brightness duty cycle adjustment signal, and a second input terminal of the first driving module is configured to receive a lighting control signal;
the first drive module is configured to: and responding to the brightness duty ratio adjusting signal and the light-emitting control signal to supply power to the light source.
5. The light-emitting substrate according to claim 4, further comprising: a second driving module;
the second driving module is used for: providing a brightness duty ratio adjusting signal and a light-emitting control signal to the first driving module; and responding to a shutdown signal, generating a starting signal and outputting the starting signal to the control end of the switch module.
6. The light-emitting substrate according to claim 5, wherein the plurality of light-emitting cells includes a plurality of light-emitting cell columns extending in a first direction and arranged in a second direction;
the light emitting substrate further includes: a plurality of start signal lines corresponding to the light emitting unit rows one to one; the starting signal line is coupled with the second driving module and the control end of the switch module;
the switch modules in the light-emitting units in the same light-emitting unit column are coupled to the same turn-on signal line.
7. The luminescent substrate according to any one of claims 1 to 3 and 6, wherein the light source comprises: a plurality of mini light emitting diodes connected in series.
8. A method for driving a light-emitting substrate according to any one of claims 1 to 7, wherein the method comprises:
a light emitting stage, wherein the first driving module supplies power to the light source;
in the charging stage, the first driving module keeps supplying power to the light source, and provides a starting signal to a control end of a switch module included in the light source protection circuit to control the switch module to be switched on, so that a storage module included in the light source protection circuit stores electric energy between a first end and a second end of the light source;
and in the power-off stage, the first driving module stops supplying power to the light source, and keeps supplying a starting signal to the control end of the switch module, so that the switch module is controlled to be conducted, and the storage module discharges to the first end and the second end of the light source.
9. The method according to claim 8, wherein supplying power to the light source through the first driving module specifically comprises:
and providing a brightness duty ratio adjusting signal and a light-emitting control signal for the first driving module, and supplying power to the light source through the first driving module according to the brightness duty ratio adjusting signal and the light-emitting control signal.
10. The method of claim 8, wherein the light emitting substrate further comprises a second driving module; in the charging stage, a start signal is provided to the control end of the switch module to control the switch module to be turned on, and the method specifically includes:
and transmitting a shutdown signal to a second driving module, generating a starting signal according to the shutdown signal through the second driving module, and sending the starting signal to the control end of the switch module to control the switch-on of the switch module.
11. A display device comprising the light-emitting substrate according to any one of claims 1 to 7.
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| CN103943064A (en) * | 2014-03-11 | 2014-07-23 | 京东方科技集团股份有限公司 | Shut-down control method and circuit, driving circuit and AMOLED display device |
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| CN100592357C (en) * | 2007-04-26 | 2010-02-24 | 海尔集团公司 | Process for startup and closing backlight lamp of liquid crystal screen and control system thereof |
| CN102984856B (en) * | 2010-05-21 | 2014-10-22 | 广东梅雁吉祥水电股份有限公司 | Dimming lamp |
| CN102306485A (en) * | 2011-09-06 | 2012-01-04 | 深圳市华星光电技术有限公司 | Light emitting diode (LED) driving circuit, liquid crystal display device and LED driving method |
| CN206533573U (en) * | 2016-12-19 | 2017-09-29 | 深圳市崧盛电子股份有限公司 | A kind of power supply adjusting control circuit and power supply |
| CN108230974B (en) * | 2018-01-26 | 2021-02-02 | 京东方科技集团股份有限公司 | Light-emitting device defect detection circuit and method, display driving device, display device and detection method thereof |
| CN111415626A (en) * | 2020-03-04 | 2020-07-14 | 深圳创维－Rgb电子有限公司 | Mini-L ED light source and driving circuit and driving method thereof |
| CN111599319B (en) * | 2020-06-01 | 2021-07-09 | 海信视像科技股份有限公司 | Backlight driving circuit, method and display device |
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