CN112992083A

CN112992083A - Drive circuit, display panel and display device

Info

Publication number: CN112992083A
Application number: CN202110353974.8A
Authority: CN
Inventors: 东强; 孙晓平; 马从华; 王丽花
Original assignee: Shanghai Tianma Microelectronics Co Ltd
Current assignee: Shanghai Tianma Microelectronics Co Ltd
Priority date: 2021-04-01
Filing date: 2021-04-01
Publication date: 2021-06-18
Anticipated expiration: 2041-04-01
Also published as: CN112992083B

Abstract

The invention provides a driving circuit, a display panel and a display device, wherein in the driving circuit provided by the technical scheme of the application, a dimming assembly is arranged on the light emitting side of a light source assembly, the dimming assembly is provided with a plurality of dimming units, a sub-driving circuit connected with the dimming units is provided with an input module and a control module, the input module can output a first control signal based on an input signal, and the control module can control the light emitting angle of the dimming units based on the first control signal, so that the adjustment of the light emitting angles of the emergent light rays of different areas of the light source assembly is realized. When the light-emitting structure is used as a backlight module, based on the above description, regional backlight adjustment can be realized without adopting a light source assembly requiring independent partition control.

Description

Drive circuit, display panel and display device

Technical Field

The application relates to the technical field of display devices, in particular to a driving circuit, a display panel and a display device.

Background

With the continuous development of scientific technology, more and more display devices are widely applied to daily life and work of people, bring great convenience to the daily life and work of people, and become an indispensable important tool for people at present.

The main part of the display device for realizing the display function is a display panel, the liquid crystal display panel is one of the current mainstream display panels, the liquid crystal display panel mainly comprises a backlight module and a display module which are oppositely arranged, and the display module can display images based on backlight and data signals emitted by the backlight module.

The exiting direction of the existing display device is fixed and unchangeable, and along with the improvement of the display performance requirement of a user on the display device, the exiting direction of the display device needs to be controlled.

Disclosure of Invention

In view of the above, to solve the above problems, the present invention provides a driving circuit, a display panel and a display device, and the technical solution is as follows:

a driving circuit of a light emitting structure, the driving circuit for driving the light emitting structure, the light emitting structure comprising: the dimming assembly is provided with a first surface and a second surface which are opposite, and the first surface is a light-emitting surface; a light source assembly disposed opposite the second surface; the dimming component comprises a plurality of dimming units, and the driving circuit is provided with a sub-driving circuit connected with the dimming units;

the sub-driving circuit includes:

the input module is used for outputting a first control signal based on an input signal;

and the control module is used for controlling the light emitting angle of the dimming unit based on the first control signal.

According to the above description, in the driving circuit provided by the technical scheme of the application, the light-emitting side of the light source assembly is provided with the dimming assembly, the dimming assembly is provided with the plurality of dimming units, the sub-driving circuit connected with the dimming units is provided with the input module and the control module, the input module can output the first control signal based on the input signal, and the control module can control the light-emitting angle of the dimming unit based on the first control signal, so that the adjustment of the light-emitting angle of the emergent light rays of different areas of the light source assembly is realized. When the light-emitting structure is used as a backlight module, based on the above description, regional backlight adjustment can be realized without adopting a light source assembly requiring independent partition control.

The present application also provides a display panel, which includes:

light-emitting structure, light-emitting structure is used for as backlight unit, and light-emitting structure includes: the dimming assembly is provided with a first surface and a second surface which are opposite, and the first surface is a light-emitting surface; a light source assembly disposed opposite the second surface; the dimming assembly comprises a plurality of dimming cells;

the display module is arranged opposite to the first surface;

the drive circuit includes a sub-drive circuit connected to the light unit.

According to the above description, the display panel provided by the technical scheme of the application has the light-emitting structure, and can adopt the driving circuit to independently control the light-emitting angles of the emergent rays of different areas of the light source assembly, so that the regional backlight control is realized, and the light source assembly needing independent partition control is not required.

The application also provides a display device which comprises the display panel.

As can be seen from the above description, the display device provided in the present application adopts the above display panel, and does not need to adopt a light source assembly that needs independent partition control.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

The structures, proportions, and dimensions shown in the drawings and described in the specification are for illustrative purposes only and are not intended to limit the scope of the present disclosure, which is defined by the claims, but rather by the claims, it is understood that these drawings and their equivalents are merely illustrative and not intended to limit the scope of the present disclosure.

Fig. 1 is a cross-sectional view of a light emitting structure according to an embodiment of the present disclosure;

FIG. 2 is a top view of a light modulating assembly of the light emitting structure shown in FIG. 1;

fig. 3 is a schematic block structure of a sub-driving circuit according to an embodiment of the present disclosure;

fig. 4 is a circuit diagram of an input module according to an embodiment of the present disclosure;

fig. 5 is a circuit diagram of another input module according to an embodiment of the present disclosure;

fig. 6 is a cross-sectional view of a dimming unit according to an embodiment of the present application;

fig. 7 is a schematic diagram illustrating a principle that a light-adjusting unit adjusts a light-emitting angle according to an embodiment of the present disclosure;

fig. 8 is a circuit diagram of a control module according to an embodiment of the present disclosure;

FIG. 9 is a circuit diagram of another control module provided in an embodiment of the present application;

FIG. 10 is a circuit diagram of another control module provided in an embodiment of the present application;

FIG. 11 is a circuit diagram of another control module according to an embodiment of the present disclosure;

fig. 12 is a circuit diagram of a sub-driving circuit according to an embodiment of the present disclosure;

fig. 13 is a circuit diagram of another seed driving circuit according to an embodiment of the present disclosure;

fig. 14 is a schematic layout diagram of a driving circuit and a dimming unit according to an embodiment of the present disclosure;

FIG. 15 is a timing diagram of the sub-driving circuit shown in FIG. 13;

fig. 16 is a cross-sectional view of a display panel according to an embodiment of the present application;

fig. 17 is a top view of a light source module 11 according to an embodiment of the present disclosure;

fig. 18 is a schematic structural diagram of a display device according to an embodiment of the present application;

FIG. 19 is a schematic diagram illustrating an operation principle of a display device as a vehicle-mounted display screen according to an embodiment of the present application;

fig. 20 is a schematic diagram illustrating the principle of adjusting the light-emitting angle of the display device.

Detailed Description

Embodiments of the present application will now be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the application are shown, and in which it is to be understood that the embodiments described are merely illustrative of some, but not all, of the embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In a conventional side-in type backlight module or a direct-down backlight module, a light source component is generally an LED (light emitting diode) lamp strip, and the overall brightness of emergent backlight can only be adjusted by synchronously adjusting a plurality of LEDs in the LED lamp strip.

With the development of display technologies, high-quality image display technologies, including but not limited to HDR (high dynamic range image) display technologies, require a backlight module capable of performing area backlight adjustment. In some specific application environments, it is also required that the backlight module can perform regional backlight adjustment, for example, during driving at night, the light intensity is weak in a dark external environment, since the front windshield reflects the emergent light of the vehicle-mounted display screen, the road condition of a user is influenced, the light-emitting angle of at least part of the display panel needs to be changed through the regional backlight adjustment, the problem of reflection of the front windshield is reduced, for example, the user is in a public place, in order to prevent others around from peeping the display content, the light-emitting angle of at least part of the display panel needs to be adjusted through the regional backlight adjustment, so that the visible angle of the display panel is reduced, and peeping is prevented.

In order to achieve the purpose, a technical scheme is that a novel light source assembly is adopted on the basis of a conventional direct type backlight module, the light source assembly is provided with a plurality of light-emitting elements which are arranged in an array mode, and the light-emitting elements can be Micro LEDs (Micro diodes) or MiniLEDs (sub-millimeter light-emitting diodes). Wherein, Micro LED and MiniLED are neotype LED, have the same electrical characteristic with conventional LED, are current type device with LED is the same, so can realize the accurate control to Micro LED and MiniLED luminance through control current.

The light source component is divided into a plurality of areas, each area is provided with a plurality of light-emitting elements, and the brightness of the light-emitting elements is controlled by each area through an independent power circuit, so that regional backlight adjustment is realized. The direct type backlight module with the regional dimming function can achieve accurate current control of each region, the brightness picture can be increased to the brightness which can not be reached by an OLED display panel, and the dark picture can approach to zero brightness.

Conventional light emitting circuit designs mainly include Passive (PM) driving schemes and Active (AM) driving schemes. The driving scheme of the PM directly drives the light emitting elements to emit light through the LED driver, and has a limited number of partitions and high cost. The AM driving scheme requires a current control mode, has high difficulty in gray scale control, requires a Thin Film Transistor (TFT) as a driving transistor, has a complex process, has poor device uniformity, requires a complex threshold compensation circuit or external compensation, and has high power consumption due to large power consumption of the TFT driving transistor.

In addition, in the existing regional backlight adjustment scheme, only the adjustment of the brightness of different regions can be realized, and the light emitting direction cannot be adjusted.

In order to solve the above problem, the technical scheme of this application provides a drive circuit of light-emitting structure, light-emitting structure is including adjusting luminance subassembly and light source subassembly, it adjusts luminance the subassembly to be provided with in the light-emitting side of light source subassembly, it has a plurality of units of adjusting luminance to adjust luminance the subassembly, sub-drive circuit who is connected with the unit of adjusting luminance has input module and control module, input module can be based on input signal, output first control signal, control module can adjust the light-emitting angle of the unit of adjusting luminance based on first control signal control, and then realize the regulation to the light-emitting angle of the different regional emergent light of light source subassembly. When the light-emitting structure is used as a backlight module, based on the above description, regional backlight adjustment can be realized without adopting a light source assembly requiring independent partition control.

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, the present application is described in further detail with reference to the accompanying drawings and the detailed description.

The embodiment of the present application provides a driving circuit of a light emitting structure, where the driving circuit is used to drive the light emitting structure, the light emitting structure is shown in fig. 1, fig. 1 is a cross-sectional view of the light emitting structure provided in the embodiment of the present application, and the light emitting structure includes: the light adjusting assembly 12, the light adjusting assembly 12 has a first surface and a second surface opposite to each other, and the first surface is a light emitting surface; and a light source assembly 11 disposed opposite the second surface.

When the light emitting structure shown in fig. 1 is used as a backlight module, the light source assembly 11 is a direct-type backlight panel, and other functional film layers, such as an antireflection film, are further disposed on one side of the light adjusting assembly 12 away from the light source assembly 11 for increasing the emergent backlight brightness. Compare in traditional straight following formula backlight unit, among this application technical scheme, even membrane and light guide plate in the subassembly 12 of adjusting luminance can regard as traditional straight following formula backlight unit need not the great light guide plate of thickness, need not to set up even membrane alone moreover, greatly reduced product thickness.

As shown in fig. 2, fig. 2 is a top view of the dimming component in the light emitting structure shown in fig. 1, and the dimming component 12 includes a plurality of dimming cells 121. A plurality of dimming cells 121 in the dimming assembly 12 may be arranged in an array.

In the embodiment of the present application, the dimming unit 121 is an electrically controlled liquid crystal film. The dimming component 12 comprises a plurality of block-shaped electrically-controlled liquid crystal films which are arranged in an array.

In another embodiment, the dimming component 12 is a liquid crystal cell, and includes a plurality of dimming pixel regions, which can be used as the dimming unit 121, and the dimming pixel regions can individually control the light emitting direction, and the structure of the liquid crystal cell can be shown in fig. 6 and 7 with reference to the following embodiments. When the light-emitting structure is used as backlight, the dimming pixel area corresponds to at least one sub-pixel used for image display in the display module. When the light emitting structure is used as a display panel, each of the pixel dimming regions is multiplexed as a sub-pixel displaying an image.

In this embodiment of the application, the number of the dimming units 121 may be set based on a requirement, and the arrangement manner may be in a multi-row and multi-column arrangement, a single-row and multi-column arrangement, or a multi-row and single-column arrangement.

In this embodiment, the driving circuit of the light emitting structure has a sub-driving circuit connected to the dimming unit 121, the sub-driving circuit has a structure as shown in fig. 3, fig. 3 is a schematic diagram of a module structure of the sub-driving circuit provided in this embodiment, and the sub-driving circuit includes: an input module 21, where the input module 21 is configured to output a first control signal Ctr1 based on the input signal VIN; and a control module 22, wherein the control module 22 is configured to control the light emitting angle of the dimming unit 121 based on the first control signal Ctr 1. The input signal VIN is a control signal related to a data signal, the data signal is used for driving the sub-pixel to display an image, and the input signal VIN is generated based on the data signal output by the display driving chip of the display module; alternatively, the input signal is a control signal separately input from the outside.

Wherein, each dimming unit is a subarea. In the driving circuit, the sub-driving circuits are correspondingly connected to the dimming cells 121. Each dimming unit 121 can adjust the light-emitting angle through the corresponding connected sub-driving circuit, and then can realize independent control of the light-emitting angle of different partitions of the light-emitting structure. Therefore, when the light-emitting structure is used as a backlight module, regional backlight adjustment can be realized through the dimming assembly and the driving circuit, and regional regulation and control of the light source assembly are not needed. When the sub-driving circuits are connected to the dimming cells 12 in a one-to-one correspondence, each of the dimming cells 121 can adjust the individually controlled light emitting angle by the correspondingly connected sub-driving circuit.

As shown in fig. 4, fig. 4 is a circuit diagram of an input module according to an embodiment of the present application, where the input module 21 includes: the positive phase input end of the operational amplifier OP is connected with an input signal VIN; a first resistor R1, one end of the first resistor R1 is grounded, and the other end is connected to the negative phase input end of the operational amplifier OP; a second resistor R2, the second resistor R2 being connected between the output terminal and the negative phase input terminal of the operational amplifier OP. The output terminal of the operational amplifier OP outputs a first control signal Ctr 1. The operational amplifier OP is a high-gain operational amplifier.

In the embodiment of the present application, the transistor is an FET (field effect transistor), and may be a TFT (thin film transistor), a JFET (junction field effect transistor), or a MOSFET (metal oxide semiconductor field effect transistor). The TFT or FET device is used as a switching device, so that the application range of the driving voltage is greatly improved, and the driving circuit is compatible with the TFT substrate process and can be manufactured on the TFT substrate.

In the manner shown in fig. 4, the input module 21 can be constructed by the first resistor R1, the second resistor R2 and the operational amplifier OP, so as to output the first control signal Ctr1 based on the input signal VIN, and the circuit structure is simple.

In the technical scheme, each resistance value can be set based on requirements. The resistors may be ITO blocks and the transistors may be TFTs. Therefore, the method can be compatible with the ITO electrode and TFT technology in the existing display panel.

As shown in fig. 5, fig. 5 is a circuit diagram of another input module provided in the embodiment of the present application, and based on the manner shown in fig. 4, in the manner shown in fig. 5, the input module 21 further includes: a gate S connected to a non-inverting input terminal of the operational amplifier OP, the gate S being configured to select an input first signal VIN1 or a second signal VIN2 as the input signal VIN.

When the first signal VIN1 is used as the input signal VIN, the light-emitting structure is in a first operation mode, and the light-emitting angle of each dimming cell 121 is individually controlled based on the first signal. When the second signal VIN2 is used as the input signal VIN, the light-emitting structure is in a second operating mode, and the light-emitting angles of the plurality of dimming unit groups are uniformly controlled based on the second signal; the dimming unit group comprises a plurality of dimming units 121 sequentially arranged along a first direction; the dimming unit groups are sequentially arranged in a second direction, and the first direction is perpendicular to the second direction. The first direction may be a row direction of an array where the dimming cells 121 in the dimming component 12 are located, and the second direction may be a column direction of the array where the dimming cells 121 in the dimming component 12 are located.

The first signal is related to the data signal of the dimmed unit 121 to which the sub-area circuit is connected. The second signal is related to the data signals of the plurality of dimming cells 121. The control modules 22 and the dimming units 121 are connected in a one-to-one correspondence manner, and the control modules 22 connected to the dimming units 121 in the same column share the input module 21. The first signal is related to the data signal of the display area corresponding to the connected dimming unit 121, the light emitting direction of the connected dimming unit 121 is controlled by the first signal, and the light emitting direction of each dimming unit 121 is only related to the data signal of the corresponding display area. A plurality of consecutive dimming units 121 may be set as a group, and the input modules connected to the dimming units 121 of the same group input the same second signal, where the second signal is related to the data signals of the plurality of display regions corresponding to the dimming units 121 of the same group.

In the manner shown in fig. 5, by adding the gate S, the input module 21 can select to input the first signal VIN1 or the second signal VIN as the input signal VIN, so as to select different operation modes, and select an operation mode required by the current usage scenario of the user.

As described above, each dimming unit is a partition, and each dimming unit 121 can adjust the light emitting angle through the corresponding sub-driving circuit, so as to realize independent control of the light emitting angle of different partitions of the light emitting structure. Therefore, the light-emitting structure can be used as a backlight module of a display panel, and the display panel is provided with a plurality of display areas which are arranged opposite to the dimming unit. In the dimming unit 121 corresponding to the display area, the first signal Ctr1 is related to a data signal of a sub-pixel in the display area, and the larger the display brightness of the display area is, the smaller the light emitting angle of the dimming unit 121 is.

At this time, the display panel is a liquid crystal display panel and is provided with a backlight module and a display module which are oppositely arranged. The display module is a liquid crystal display module and is provided with a plurality of sub-pixels arranged in an array. Multiplexing light-emitting structure that this application technical scheme provided as backlight unit, liquid crystal display panel's display surface has a plurality of display areas, and these a plurality of display areas are same display panel's different regions on display surface, belong to same display surface, do not have the visual differentiation sign in the outward appearance between the display area.

When the light emitting structure provided by the embodiment of the application is used as a backlight module, the light emitting angle of the corresponding dimming unit 121 can be adjusted based on the display brightness of each display area in the display panel, so that the light emitting angle of the dimming unit 121 is inversely related to the display brightness of the corresponding display area, that is, the larger the display area brightness is, the smaller the light emitting angle of the corresponding dimming unit 121 is, the smaller the display area brightness is, and the larger the light emitting angle of the corresponding dimming angle is. For a specific application scenario, the use safety can be improved.

If in the driving scene at night, light is weaker in the dark external environment, and the user sight is more easily disturbed by the vehicle-mounted display screen display light reflected by the front windshield, thereby influencing driving safety, and particularly, the larger the display brightness of the vehicle-mounted display screen is, the more serious the disturbance of the reflected light to the user sight is, so that the user is not easy to see the dark external environment road condition clearly. By adopting the technical scheme, the larger the display brightness of the display area is, the smaller the light-emitting angle of the dimming unit is, and then the large-angle emergent of light can be reduced, so that the problem can be solved.

And when the user uses the display panel to watch images in public places, the larger the display brightness is, the easier the display content can be peeped by other people nearby, and by adopting the technical scheme of the application, the larger the display brightness is in the display area, the smaller the light-emitting angle of the dimming unit is, and then the large-angle emergent of light can be reduced, the visual angle of the display panel is reduced, and the purpose of peeping prevention is realized.

The light-emitting structure provided by the embodiment of the application can also be used as a display panel. At this time, the liquid crystal display module is not needed, and the dimming unit 121 in the light emitting structure is a sub-pixel of the display panel. The light source component emits a white surface light source, a color resistance unit is arranged on the light emitting side of the dimming unit 121, the sub-pixels comprise a red sub-pixel R, a green sub-pixel G and a blue sub-pixel B, the color resistance unit corresponding to the dimming unit 121 serving as the red sub-pixel R can pass red light, green light and blue light are blocked, the color resistance unit corresponding to the dimming unit 121 serving as the green sub-pixel G can pass green light, red light and blue light are blocked, the color resistance unit corresponding to the dimming unit 121 serving as the blue sub-pixel B can pass blue light, and red light and green light are blocked.

When the light-emitting structure is used as a display panel, a liquid crystal display module is not needed, the light dimming assembly can display images based on light emitted by the backlight assembly, and in a night driving scene, reflection of front windshield to display light of the vehicle-mounted display screen can be reduced by adjusting the light emitting angle of the light dimming unit 121, so that interference of the reflected light with the sight of a user is avoided, and driving safety is improved; when a user watches a display panel scene in a public place, the light emitting angle of the dimming unit 121 can be adjusted, so that the visual angle can be reduced, and the sight line can be prevented from being peeped.

As shown in fig. 6, fig. 6 is a cross-sectional view of a dimming unit according to an embodiment of the present application, where the dimming unit 121 includes: a first transparent driving electrode 121a and a second transparent driving electrode 121b facing each other, and a dimming medium layer 121c between the two transparent driving electrodes. The two transparent driving electrodes can be ITO electrodes. The two transparent driving electrodes may be formed on a transparent substrate, such as a PI (polyimide), a glass plate, or the like. The transparent substrate is not shown in fig. 6.

The dimming medium layer 121c includes a base material and a dopant mixed in the base material. For example, the light modulating dielectric layer 121c may be polymer dispersed liquid crystal, the substrate may be high molecular polymer, and the dopant may be liquid crystal. The method can adopt a single liquid crystal membrane, and realizes the zone control by a graphical method.

As shown in fig. 7, fig. 7 is a schematic diagram illustrating a principle that a light emitting angle is adjusted by a dimming unit according to an embodiment of the present disclosure, in an unpowered state, as shown in a left diagram in fig. 7, liquid crystal molecules 121d in a polymer dispersed liquid crystal are randomly and randomly arranged, light emitted by a light source assembly 11 is scattered by the polymer dispersed liquid crystal, in this state, a light uniformizing function can be implemented by the polymer dispersed liquid crystal, each dimming unit 121 corresponds to a light uniformizing partition, and at this time, the light emitting angle is large. When power is applied, as shown in the right diagram of fig. 7, the liquid crystal molecules 121d in the polymer dispersed liquid crystal are regularly arranged under the action of the electric field, and under different electric fields (i.e., different voltages are applied to the two transparent driving electrodes), the deflection angles of the liquid crystal molecules 121d are different, and the larger the electric field is, the smaller the exit angle of the light is.

As shown in fig. 8, fig. 8 is a circuit diagram of a control module according to an embodiment of the present application, where the control module 22 includes:

the scanning unit 223 is connected with the output end of the input module 21, and is used for controlling the conduction state of the input module 21 and the control module 22 based on a second control signal SCAN; when the input module 21 and the control module 22 are turned on, the storage capacitor C is charged by the first control signal Ctr1, and when the input module 21 and the control module 22 are turned off, the storage capacitor C is discharged, a first plate of the storage capacitor C is grounded, and a second plate of the storage capacitor C is connected to the output end of the scanning unit 223, so as to input a first control signal Ctr 1;

a first control unit 221 connected to the second plate of the storage capacitor C and the two transparent driving electrodes of the dimming unit 121, respectively, wherein one duty cycle of the dimming unit 121 includes: a first half cycle and a second half cycle, the first Control unit 221 is configured to Control a light emitting angle of the dimming unit 121 in the first half cycle based on the first Control signal Ctr1 and a third Control signal Control _ P;

the second Control unit 222, connected to the second plate of the storage capacitor C and the two transparent driving electrodes of the dimming unit 121, is configured to Control the light emitting angle of the dimming unit 121 in the second half period based on the first Control signal Ctr1 and the fourth Control signal Control _ N.

When the polymer dispersed liquid crystal is used as the dimming medium layer 121c, the third Control signal Control _ P is a Control signal for driving a positive half period of the polymer dispersed liquid crystal, and the fourth Control signal Control _ N is a Control signal for driving a negative half period of the polymer dispersed liquid crystal.

In the manner shown in fig. 8, a dead-time switching time is provided between the adjacent first half cycle and the second half cycle, so as to prevent the second plate of the storage capacitor C from being discharged to ground without passing through the dimming unit 121, thereby preventing the light-emitting angle of the dimming unit 121 from being abnormally controlled.

As shown in fig. 8, a control terminal of the first transistor M1 of the first transistor M1 is connected to the second control signal SCAN, a first electrode of the first transistor M1 is connected to an output terminal of the operational amplifier OP, and a second electrode of the first transistor M1 outputs the first control signal Ctr1 and is connected to the second plate of the storage capacitor C.

The first control unit 221 includes: a second transistor M2 and a third transistor M3. A Control end of the second transistor M2 is connected to a fifth Control signal Control _ P _1, a first electrode is connected to the second plate of the storage capacitor C, and a second electrode is connected to the first transparent driving electrode. The Control end of the third transistor M3 is connected to the third Control signal Control _ P, the first electrode is connected to the second transparent driving electrode, and the second electrode is grounded.

The second control unit 222 includes: a fourth transistor M4 and a fifth transistor M5. A Control end of the fourth transistor M4 is connected to a sixth Control signal Control _ N _1, a first electrode is connected to the second plate of the storage capacitor C, and a second electrode is connected to the second transparent driving electrode. The Control end of the fifth transistor M5 is connected to the fourth Control signal Control _ N, the first electrode is connected to the first transparent driving electrode, and the second electrode is grounded. In this way, the two control units are respectively formed by two transistors, and the circuit structure is simple.

By setting the dead time switching time, it is possible to avoid grounding the second plate of the storage capacitor C through the second transistor M2 and the fifth transistor M5, or through the third transistor M3 and the fourth transistor M4, in both half-cycles, to ensure the normal operation of the circuit.

In the embodiment, the first transistor M1 is an N-type transistor. For example, the transistor is a MOSFET, the gate of the MOSFET is the control terminal of the transistor, the drain is the first electrode of the transistor, and the source is the second electrode of the transistor.

As shown in fig. 9, fig. 9 is a circuit diagram of another control module according to an embodiment of the present application, based on the method shown in fig. 8, and in the method shown in fig. 9, the second transistor M2 to the fifth transistor M5 are all N-type transistors. The fifth Control signal Control _ P _1 is the same as the third Control signal Control _ P, and the sixth Control signal Control _ N _1 is the same as the fourth Control signal Control _ N. In this manner, the two Control units respectively include two N-type transistors, the Control module 22 is formed by four N-type transistors, the circuit structure is simple, the required Control module can be realized by four simple transistors, in the circuit structure, the second transistor M2 and the third transistor M3 can be simultaneously driven by the third Control signal Control _ P, and the fourth transistor M4 and the fifth transistor M5 can be simultaneously driven by the fourth Control signal Control _ N. The circuit does not operate continuously and stably.

As shown in fig. 10, fig. 10 is a circuit diagram of another control module according to an embodiment of the present disclosure, based on the manner shown in fig. 8, in the manner shown in fig. 10, both the second transistor M2 and the fourth transistor M4 are P-type transistors, and both the third transistor M3 and the fifth transistor M5 are N-type transistors; the fifth Control signal Control _ P _1 and the third Control signal Control _ P are negative logic signals, i.e., opposite in phase. The sixth Control signal Control _ N _1 and the fourth Control signal Control _ N are negative logic signals, i.e., opposite in phase. In this manner, each control unit includes one N-type transistor and one P-type transistor, and the control module 22 is formed by two N-type transistors and two P-type transistors, and in this circuit structure, the first control unit 221 and the second control unit 222 require two control signals. The high level of the level signal of the fifth Control signal Control _ P _1 needs to be consistent with the voltage of the storage capacitor C to ensure that the second transistor M2 can be turned off, and the high level of the sixth Control signal Control _ N _1 needs to be consistent with the voltage of the storage capacitor C to ensure that the fourth transistor M4 can be turned off. In the mode, the required control module can be realized through four transistors, the circuit structure is simple, and the problem that the circuit in the scheme of fig. 9 cannot work continuously and stably is solved.

As shown in fig. 11, fig. 11 is a circuit diagram of another control module provided in an embodiment of the present application, based on the manner shown in fig. 8, in the manner shown in fig. 11, the first control unit 221 further includes: a sixth transistor M6; a Control terminal of the second transistor M2 is connected to the first electrode of the sixth transistor M6 through a third resistor R3, and is connected to the second plate of the storage capacitor C through a fourth resistor R4, and the fifth Control signal Control _ P _1 is a node voltage between the third resistor R3 and the fourth resistor R4; the Control terminal of the sixth transistor M6 is connected to the third Control signal Control _ P, and the second electrode is grounded. The second control unit 222 further includes: a seventh transistor M7; a Control terminal of the fourth transistor M4 is connected to the first electrode of the seventh transistor M7 through a fifth resistor R5, and is connected to the second plate of the storage capacitor C through a sixth resistor R6, and the sixth Control signal Control _ N _1 is a node voltage between the fifth resistor R5 and the sixth resistor R6; the Control end of the seventh transistor M7 is connected to the fourth Control signal Control _ N, and the second electrode is grounded. In this manner, the Control module 22 only needs two Control signals, that is, the third Control signal Control _ P and the fourth Control signal Control _ N, and the two Control units respectively make the fifth Control signal Control _ P _1 and the sixth Control signal Control _ N _1 associate with the first Control signal Ctr1 and the second plate potential of the storage capacitor C through a scheme of dividing voltage by two resistors, so as to solve the problem that the high level of the level signal of the fifth Control signal Control _ P _1 in the manner of fig. 10 needs to be consistent with the voltage of the storage capacitor C to ensure that the second transistor M2 can be turned off, and the high level of the sixth Control signal Control _ N _1 needs to be consistent with the voltage of the storage capacitor C to ensure that the fourth transistor M4 can be turned off.

In the manner shown in fig. 11, the second transistor M2 and the fourth transistor M4 are both P-type transistors; the third transistor M3, the fifth transistor M5 to the seventh transistor M7 are all N-type transistors.

In the mode shown in fig. 11, the second transistor M2, the sixth transistor M6, the third resistor R3 and the fourth resistor 4 form a basic part of the driving circuit array arrangement, and the corresponding array and the storage capacitor C cooperate to realize a line field scanning structure similar to the display of the display module.

As shown in fig. 12, fig. 12 is a circuit diagram of a sub-driving circuit according to an embodiment of the present disclosure, in which an input module 21 is shown in fig. 3, and a control module 22 is shown in fig. 11. Obviously, in the embodiment of the present application, the sub-driving circuit input module may be in any one of fig. 3 and 4, and the control module 22 may be in any one of fig. 8 to 11, and based on the above description, the sub-driving circuit of the present application preferably employs the control module shown in fig. 11.

As shown in fig. 13, fig. 13 is a circuit diagram of another sub-driving circuit provided in the embodiment of the present application, based on the method shown in fig. 12, in the method shown in fig. 13, the control module 22 further includes a seventh resistor R7 connected between the first transparent driving electrode and the second transparent driving electrode, the first control unit 221 can form a ground loop in the first half-cycle through the seventh resistor R7 to release current, the second control unit 222 can form a ground loop in the second half-cycle through the seventh resistor R7 to release current, and the dimming unit 121 forms an electric field based on a voltage across the seventh resistor R7 to control a light emitting angle.

As shown in fig. 14, fig. 14 is a schematic wiring diagram of a driving circuit and a dimming unit provided in the present embodiment, the dimming component has a plurality of dimming units 121 arranged in an array; the driving circuit may have a plurality of control modules 22 corresponding to the dimming units 121 one to one; the control modules 22 connected to the dimming units 121 in the same column share the same input module 21, and the control modules 22 connected to the dimming units 121 in different columns are connected to different input modules 21.

The control module 22 may be in any form of the above embodiments, in fig. 14, for convenience of clearly illustrating the wiring manner, only the first transistor M1 of the control module 22 is shown, the specific circuit structure thereof is not shown, the input module 21 is not shown, and the specific circuit implementation of the input module 21 and the control module 22 may refer to the above description and will not be repeated here.

The control modules 22 connected to the dimming units 121 in the same row are connected to the same first signal line 32, the control modules 22 connected to the dimming units 121 in different rows are connected to different first signal lines 32, the first signal lines 32 are used for inputting the second control signal SCAN, and fig. 14 shows n first signal lines 32, which are sequentially input with the second control signals SCAN _1 to SCAN _ n. As such, the control modules 22 connected to the plurality of dimming units 121 in the same row may input the same second control signal SCAN through the same first signal line 32 to perform synchronous switching control.

All the sub-driving circuits 31 are connected to the same second signal line 33 and the same third signal line 34; the second signal line 33 is used for inputting the third Control signal Control _ P, and the third signal line 34 is used for inputting the fourth Control signal Control _ N. The third Control signal Control _ P and the fourth Control signal Control _ N are Control signals of a global format, and the third Control signal Control _ P is input to all the sub-drive circuits 31 through the same second signal line 33, and the fourth Control signal Control _ N is input through the same third signal line 3.

The control modules 22 connected to the dimming units 121 in the same row multiplex the same input module 21, the input module 21 is connected to a fourth signal line 35, the control modules 22 connected to the dimming units 121 in different rows are connected to different input modules 21 to be connected to different fourth signal lines 35, and the fourth signal line 35 is used for inputting the first signal or the second signal. Thus, the control modules 22 connected to the dimming units 121 in the same row are connected to the same input module 21, the control modules 22 connected to the dimming units 121 in different rows are connected to different input modules 21, and the different input modules 21 respectively input the first signal or the second signal through one fourth signal line 35. The first signal and the second signal are both signal Source _ r related to the sub-pixel data signal.

The operation of the sub-driving circuit will be described with reference to the sub-driving circuit and the corresponding timing diagram shown in fig. 13:

as shown in fig. 15, fig. 15 is a timing diagram corresponding to the sub-driving circuit shown in fig. 13, where V1 is a charging voltage of the operational amplifier to the storage capacitor, V2 is a voltage held by the storage capacitor, V3 is a voltage signal for driving the polymer dispersed liquid crystal in the positive half period, and V4 is a voltage signal for driving the polymer dispersed liquid crystal in the negative half period. The first half cycle has a dead time t with the next adjacent second half cycle, and the second half cycle has a dead time t with the next adjacent first half cycle. Dead zone switching time t is reserved in the positive and negative period switching process, and the storage capacitor is prevented from being grounded and discharged through the light modulation unit 121. The voltage direction conversion of the amplified input signal VIN is realized through the operation of the third Control signal Control _ P and the fourth Control signal Control _ N, and the driving voltage is still a forward voltage within a voltage range of 6-14V.

As shown in fig. 13 and 15, in the first half cycle, when the third Control signal Control _ P is at a high level, the third transistor M3 and the sixth transistor M6 are turned on, so the first Control signal Ctr1 can form a current path between the fourth resistor R4 and the third resistor R3 and the ground, the Control terminal of the second transistor M2 is pulled low, the voltage of the gate-source voltage Vgs of the second transistor M2 is greater than the threshold voltage Vth by the voltage dividing circuit formed by the fourth resistor R4, the third resistor R3 and the current path formed by the sixth transistor M6, the second transistor M2 is turned on, and forms a loop with the third transistor M3, and the voltage between the two transparent driving electrodes of the dimming unit 121 is equal to the voltage across the seventh resistor R7 under the loop. In the second half period, the fourth Control signal Control _ N is at a high level, and the operation principle is the same, which is not repeated here.

Based on the foregoing embodiments, another embodiment of the present application further provides a display panel, as shown in fig. 16, fig. 16 is a cross-sectional view of the display panel provided in the embodiment of the present application, where the display panel includes:

a light emitting structure 10, the light emitting structure 10 being configured to serve as a backlight module, the light emitting structure 10 comprising: the light adjusting assembly 12 has a first surface and a second surface opposite to each other, and the first surface is a light emitting surface; a light source assembly 11 disposed opposite to the second surface; the dimming assembly 12 comprises a plurality of dimming cells;

the display module 13 is arranged opposite to the first surface;

the driving circuit includes a sub-driving circuit connected to the dimming unit 121. The dimming unit and the sub-driving circuit are not shown in fig. 16, and both implementations can be described with reference to the above embodiments, and are not repeated here.

When the light emitting structure 10 is used as a backlight module, the existing liquid crystal display module can be mounted, and the compatibility is good. The display quality of the display panel can meet the quality standard requirement. The driving circuit mounted on the light emitting structure has a simple structure, and can control the second control signal of the first transistor by external input. In the multi-liquid crystal box structure, the driving circuit can be connected with the FPC of the liquid crystal display module through the FPC (flexible printed circuit).

As shown in fig. 17, fig. 17 is a top view of a light source module 11 according to an embodiment of the present disclosure, where the light source module 11 includes a plurality of micro light-emitting elements 111 arranged in an array. As described above, the Micro light emitting elements 111 may be Mini LEDs and Micro LEDs.

In the embodiment of the present application, in the light source assembly 11, all the micro light emitting elements 111 can adjust the brightness synchronously, and at this time, the local backlight adjustment is realized through the dimming assembly 12 and the driving circuit connected thereto.

In one mode, the light-emitting circuit connected to the light source assembly 11 uniformly adjusts the driving current of all the micro light-emitting elements 111, integrally adjusts the brightness of the backlight module, and adjusts the light-emitting angle of the corresponding dimming unit through the sub-driving circuit, thereby achieving the adjustment of the light-emitting angle of the local backlight. The light emitting angle of the corresponding dimming unit is adjusted through the sub-driving circuit, and the light intensity is not changed. The regional backlight adjustment in the mode can only realize regional adjustment of the light-emitting angle, and cannot realize regional adjustment of the brightness.

In other manners, the light source module 11 may also have a plurality of regions, each region has a plurality of micro light-emitting elements, the micro light-emitting elements in different regions of the light source module 11 can individually control the light-emitting brightness through the light-emitting circuit, and further the light source module 11 can individually control the backlight brightness in different regions, and can adjust the light-emitting angle of the corresponding dimming unit through the sub-driving circuit, so as to adjust the light-emitting angle of the regional backlight, and the regional backlight adjustment in this manner includes regional adjustment of brightness and regional adjustment of the light-emitting angle.

In the embodiment of the present application, in the row direction and/or the column direction of the array, the distance between two adjacent micro light emitting elements 111 is equal, so that the micro light emitting elements 111 are bound on the lamp panel.

As shown in fig. 6, the dimming unit 121 includes: a first transparent driving electrode 121a and a second transparent driving electrode 121b opposite to each other, and a dimming medium layer 121c between the two transparent driving electrodes; the first transparent driving electrode 121a and the second transparent driving electrode 121b are respectively connected to the sub-driving circuit, and the first transparent driving electrode 121a and the second transparent driving electrode 121b are used for controlling a transmission path of light on the dimming medium layer 121c based on an output signal of the sub-driving circuit, so as to adjust the light emitting angle.

As described above, the light-adjusting medium layer 121c is polymer dispersed liquid crystal. The dimming principle can be described with reference to the embodiment shown in fig. 7, and will not be repeated here. In the embodiment of the present application, the light-adjusting medium 121c is not limited to polymer dispersed liquid crystal, and may be other optical materials capable of changing refractive index or haze based on voltage, such as birefringent liquid crystal.

In the embodiment of the application, when the dimming unit is not powered on, the direct type backlight module can realize the uniform light of the corresponding area of the dimming unit through the polymer dispersed liquid crystal. The polymer dispersed liquid crystal is patterned into a plurality of blocks corresponding to the plurality of dimming units, and can be combined with the micro light-emitting elements in the light source assembly in a partitioning mode to realize real-time light-homogenizing adjustment in a partitioning level mode. The transparent driving electrode provides control voltage for the polymer dispersed liquid crystal to realize linear adjustment of the light homogenizing capability of the polymer dispersed liquid crystal, so that adjustment of different light-emitting angles is realized, and the transparent driving electrode and a light-emitting circuit of a micro light-emitting element in the light source component work cooperatively, so that power consumption can be reduced.

Based on the foregoing embodiment, another embodiment of the present application further provides a display device, as shown in fig. 18, fig. 18 is a schematic structural diagram of the display device provided in the embodiment of the present application, and includes a display panel 51, which is the display panel provided in any one of the foregoing embodiments.

Fig. 18 illustrates an example of a mobile phone as a display device, and when the display device is used as a mobile phone, the display device can achieve a display effect of preventing peeping as analyzed in the above embodiment.

Obviously, the display device that this application embodiment provided is not limited to for the cell-phone, can also be for electronic equipment that has display function such as panel computer, on-vehicle display screen and intelligent wearing equipment.

As shown in fig. 19, fig. 19 is a schematic view of a working principle of the display device provided as the vehicle-mounted display screen in the embodiment of the present application, in order to enable light emitted from a large angle of the vehicle-mounted display screen 61 to be reflected to eyes of a user by the front windshield 62 during driving at night, since the external ambient light intensity at night is weak, the reflected light (shown by an implementation arrow in fig. 19) interferes with the ambient light (shown by a dotted arrow in fig. 19), thereby interfering with vision of the user and affecting driving safety, when the display device provided by the present application is adopted as the vehicle-mounted display screen 61, the light emitting angle can be adjusted, thereby reducing the large-angle emitted light, and further reducing the light reflected by the front windshield and entering eyes.

As shown in fig. 20, fig. 20 is a schematic diagram illustrating a principle that the display device adjusts a light emitting angle, the light adjusting assembly 12 can adjust the light emitting angle, and load the driving voltage on two sides of the polymer dispersed liquid crystal in the region where the light emitting angle needs to be adjusted, so as to control the light emitting angle to prevent the large-angle light of the display device from entering human eyes through reflection of the front windshield.

The embodiments in the present description are described in a progressive manner, or in a parallel manner, or in a combination of a progressive manner and a parallel manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments can be referred to each other. The display panel and the display device disclosed in the embodiments correspond to the driving circuit disclosed in the embodiments, so that the description is relatively simple, and the relevant points can be referred to the description of the driving circuit.

It should be noted that in the description of the present application, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only used for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present application. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.

It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in an article or device that comprises the element.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A driving circuit of a light emitting structure, the driving circuit for driving the light emitting structure, the light emitting structure comprising: the dimming assembly is provided with a first surface and a second surface which are opposite, and the first surface is a light-emitting surface; a light source assembly disposed opposite the second surface; the dimming component comprises a plurality of dimming units, and the driving circuit is provided with a sub-driving circuit connected with the dimming units;

the sub-driving circuit includes:

an input module for outputting a first control signal based on an input signal;

a control module for controlling the light emitting angle of the dimming unit based on the first control signal.

2. The driving circuit of claim 1, wherein the input module comprises:

the non-inverting input end of the operational amplifier is connected with the input signal;

one end of the first resistor is grounded, and the other end of the first resistor is connected with the negative phase input end of the operational amplifier;

a second resistor connected between the output of the operational amplifier and the negative phase input.

3. The driving circuit of claim 2, wherein the input module further comprises:

the gate is connected with the non-inverting input end of the operational amplifier and used for selecting the input first signal or the input second signal as the input signal;

when the first signal is used as the input signal, the light-emitting structure is in a first working mode, and the light-emitting angle of each dimming unit is controlled independently based on the first signal;

when the second signal is used as the input signal, the light-emitting structure is in a second working mode, and the light-emitting angles of the plurality of dimming unit groups are uniformly controlled based on the second signal; the dimming unit group comprises a plurality of dimming units which are sequentially arranged along a first direction; the dimming unit groups are sequentially arranged in a second direction, and the first direction is perpendicular to the second direction.

4. The driving circuit according to claim 3, wherein the light-emitting structure is used as a backlight module of a display panel, and the display panel has a plurality of display regions disposed opposite to the light-adjusting units;

in the dimming unit corresponding to the display area, the first signal is related to a data signal of a sub-pixel in the display area, and the larger the display brightness of the display area is, the smaller the light emitting angle of the dimming unit is.

5. The driving circuit according to claim 1, wherein the light emitting structure is a display panel.

6. The driving circuit according to claim 1, wherein the dimming unit comprises: the light modulation device comprises a first transparent driving electrode, a second transparent driving electrode and a light modulation medium layer, wherein the first transparent driving electrode and the second transparent driving electrode are opposite, and the light modulation medium layer is positioned between the two transparent driving electrodes;

the control module includes:

the scanning unit is connected with the output end of the input module and used for controlling the conduction state of the input module and the control module based on a second control signal; when the input module is connected with the control module, a storage capacitor is charged through the first control signal, and when the input module is disconnected with the control module, the storage capacitor is discharged; the first polar plate of the storage capacitor is grounded, and the second polar plate is connected with the output end of the scanning unit; a first control unit respectively connected to the second plate of the storage capacitor and two transparent driving electrodes of the dimming unit, wherein one duty cycle of the dimming unit includes: a first half cycle and a second half cycle, wherein the first control unit is used for controlling the light emitting angle of the dimming unit in the first half cycle based on the first control signal and the third control signal;

and the second control unit is respectively connected with the second plate of the storage capacitor and the two transparent driving electrodes of the dimming unit and is used for controlling the light emitting angle of the dimming unit in the second half period based on the first control signal and the fourth control signal.

7. The drive circuit according to claim 6, wherein the scanning unit includes: the control end of the first transistor inputs the second control signal, the first electrode is connected with the output end of the operational amplifier, and the second electrode is connected with the second plate of the storage capacitor;

the first control unit includes: a second transistor and a third transistor;

a control end of the second transistor is connected with a fifth control signal, a first electrode is connected with a second plate of the storage capacitor, and a second electrode is connected with the first transparent driving electrode;

the control end of the third transistor is connected with the third control signal, the first electrode is connected with the second transparent driving electrode, and the second electrode is grounded;

the second control unit includes: a fourth transistor and a fifth transistor;

a control end of the fourth transistor is connected with a sixth control signal, a first electrode is connected with a second plate of the storage capacitor, and a second electrode is connected with the second transparent driving electrode;

and the control end of the fifth transistor is connected with the fourth control signal, the first electrode is connected with the first transparent driving electrode, and the second electrode is grounded.

8. The driver circuit according to claim 7, wherein the second to fifth transistors are all N-type transistors;

the fifth control signal is the same as the third control signal, and the sixth control signal is the same as the fourth control signal.

9. The driving circuit according to claim 7, wherein the second transistor and the fourth transistor are both P-type transistors, and the third transistor and the fifth transistor are both N-type transistors;

the fifth control signal and the third control signal are negative logic signals, and the sixth control signal and the fourth control signal are negative logic signals.

10. The drive circuit according to claim 7, wherein the first control unit further comprises: a sixth transistor; a control end of the second transistor is connected with a first electrode of the sixth transistor through a third resistor and is connected with a second plate of the storage capacitor through a fourth resistor, and the fifth control signal is a node voltage between the third resistor and the fourth resistor; the control end of the sixth transistor is connected to the third control signal, and the second electrode of the sixth transistor is grounded;

the second control unit further includes: a seventh transistor; a control end of the fourth transistor is connected with a first electrode of the seventh transistor through a fifth resistor and is connected with a second plate of the storage capacitor through a sixth resistor, and the sixth control signal is a node voltage between the fifth resistor and the sixth resistor; and the control end of the seventh transistor is connected to the fourth control signal, and the second electrode of the seventh transistor is grounded.

11. The driver circuit according to claim 10, wherein the second transistor and the fourth transistor are both P-type transistors;

the third transistor, the fifth transistor, and the seventh transistor are all N-type transistors.

12. The drive circuit of claim 10, wherein there is a dead-time switching time between the first half-cycle and the second half-cycle, and wherein there is no pulsed input to both the third control signal and the fourth control signal during the dead-time switching time.

13. The driving circuit of claim 6, wherein the dimming component has a plurality of dimming cells arranged in an array; the driving circuit is provided with a plurality of control modules which correspond to the dimming units one by one; the control modules connected with the dimming units in the same column share the same input module, and the control modules connected with the dimming units in different columns are connected with different input modules;

the control modules connected with the dimming units in the same row are connected with the same first signal line, the control modules connected with the dimming units in different rows are connected with different first signal lines, and the first signal lines are used for inputting the second control signals;

all the sub-driving circuits are connected with the same second signal line and the same third signal line; the second signal line is used for inputting the third control signal, and the third signal line is used for inputting the fourth control signal.

14. The driving circuit of claim 6, wherein the control module further comprises a seventh resistor connected between the first transparent driving electrode and the second transparent driving electrode.

15. A display panel, comprising:

a light emitting structure for use as a backlight module, the light emitting structure comprising: the dimming assembly is provided with a first surface and a second surface which are opposite, and the first surface is a light-emitting surface; a light source assembly disposed opposite the second surface; the dimming assembly comprises a plurality of dimming cells;

the display module is arranged opposite to the first surface;

the driving circuit according to any of claims 1-14, having a sub-driving circuit connected to the dimming cell.

16. The display panel of claim 15, wherein the light source assembly comprises a plurality of micro light-emitting elements arranged in an array.

17. The display panel according to claim 16, wherein the distance between two adjacent micro light emitting elements is equal in the row direction and/or the column direction of the array.

18. The display panel according to claim 15, wherein the dimming unit comprises: the light modulation device comprises a first transparent driving electrode, a second transparent driving electrode and a light modulation medium layer, wherein the first transparent driving electrode and the second transparent driving electrode are opposite, and the light modulation medium layer is positioned between the two transparent driving electrodes;

the first transparent driving electrode and the second transparent driving electrode are respectively connected with the sub-driving circuit, and the first transparent driving electrode and the second transparent driving electrode are used for controlling a transmission path of light rays on the dimming medium layer based on output signals of the sub-driving circuit so as to adjust the light emitting angle.

19. The display panel of claim 18, wherein the dimming medium layer is a polymer dispersed liquid crystal.

20. A display device characterized by comprising the display panel according to any one of claims 15 to 19.