CN111508412B - Driving circuit, driving method of display screen and electronic device - Google Patents
Driving circuit, driving method of display screen and electronic device Download PDFInfo
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- CN111508412B CN111508412B CN202010320673.0A CN202010320673A CN111508412B CN 111508412 B CN111508412 B CN 111508412B CN 202010320673 A CN202010320673 A CN 202010320673A CN 111508412 B CN111508412 B CN 111508412B
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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
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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
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
- G09G2330/022—Power management, e.g. power saving in absence of operation, e.g. no data being entered during a predetermined time
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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
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of El Displays (AREA)
Abstract
The invention provides a driving circuit, a driving method of a display screen and an electronic device, wherein the driving circuit comprises: the first control module is respectively connected with the cascade output end of the kth grid driving unit and the cascade input end of the (k +1) th grid driving unit; when the display screen is in a screen-off state, the cascade output end of the kth grid driving unit is disconnected with the cascade input end of the (k +1) th grid driving unit; and when the display screen is in a display state, the cascade output end of the kth grid driving unit is connected with the cascade input end of the (k +1) th grid driving unit. The driving circuit, the driving method of the display screen and the electronic device can reduce the power consumption of the driving circuit.
Description
[ technical field ] A method for producing a semiconductor device
The present invention relates to the field of display technologies, and in particular, to a driving circuit, a driving method of a display panel, and an electronic device.
[ background of the invention ]
As shown in fig. 1, after the Display screen 60 enters the off-screen state, it is usually in an Always On (AOD) state, that is, information such as date and time is displayed On the Display screen 60.
However, when the display 60 is in the AOD mode, a single color image is usually displayed in a region other than the time and date, and although the power consumption of the display can be reduced in the single color image compared to a color image, the display 60 is driven by a driving circuit, and the power consumption of the driving circuit is large because the driving circuit is still required to process the image displaying the single color.
[ summary of the invention ]
The invention aims to provide a driving circuit, a driving method of a display screen and an electronic device, which can reduce the power consumption of the driving circuit.
In order to solve the above technical problem, the present invention provides a driving circuit, where the driving circuit is configured to drive a display screen, and the display screen includes n scan lines, and includes:
the power supply module comprises a first output end and a second output end;
the driving module comprises a first input end, a second input end and n scanning output ends; the first input end is connected with the first output end;
the grid driving units comprise signal input ends, output ends, cascade input ends and cascade output ends, and the input ends of the grid driving units are connected with the corresponding scanning output ends; the output end of the grid driving unit is connected with the corresponding scanning line; the grid driving unit corresponds to the scanning line and the scanning output end respectively; wherein n is greater than or equal to 3, and 1 < k < n; the 1 st gate driving unit to the kth gate driving unit are mutually cascaded; the (k +1) th gate driving unit to the nth gate driving unit are mutually cascaded;
the first control module is respectively connected with the cascade output end of the kth grid driving unit and the cascade input end of the (k +1) th grid driving unit; when the display screen is in a screen-off state, the cascade output end of the kth grid driving unit is disconnected with the cascade input end of the (k +1) th grid driving unit;
and when the display screen is in a display state, the cascade output end of the kth grid driving unit is connected with the cascade input end of the (k +1) th grid driving unit.
The invention also provides a driving method of the display screen, which is based on the driving circuit and comprises the following steps:
when the display screen is in a screen-off state, controlling the cascade output end of the kth grid driving unit to be disconnected with the cascade input end of the (k +1) th grid driving unit;
and when the display screen is in a display state, controlling the cascade output end of the kth grid driving unit to be connected with the cascade input end of the (k +1) th grid driving unit.
The invention also provides an electronic device which comprises the driving circuit.
The invention discloses a driving circuit, a driving method of a display screen and an electronic device, wherein the driving circuit comprises a first control module which is respectively connected with a cascade output end of a kth grid driving unit and a cascade input end of a (k +1) th grid driving unit; when the display screen is in a screen-off state, the cascade output end of the kth grid driving unit is disconnected with the cascade input end of the (k +1) th grid driving unit; when the display screen is in a display state, the cascade output end of the kth grid driving unit is connected with the cascade input end of the (k +1) th grid driving unit; therefore, the stage transmission signals are not transmitted downwards after being transmitted to the GOA (K) from the GOA (1), the load of the driving circuit is reduced, and the power consumption of the driving circuit is reduced.
[ description of the drawings ]
FIG. 1 is a top view of a conventional display panel in a turned-off state;
FIG. 2 is a schematic diagram of a conventional driving circuit;
fig. 3 is a schematic structural diagram of a driving circuit according to an embodiment of the invention.
[ detailed description ] embodiments
The following description of the embodiments refers to the accompanying drawings for illustrating the specific embodiments in which the invention may be practiced. In the present invention, directional terms such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", etc. refer to directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention. In the drawings, elements having similar structures are denoted by the same reference numerals.
As shown in fig. 2, the conventional driving circuit 100 includes a power module 11, a control module 12, a driving module 13, a storage module 14, and n gate driving units GOA (1) to GOA (n) cascaded with each other, where n is greater than or equal to 3.
The driving circuit 100 is used for driving the display screen 60, and the display screen 60 includes n scan lines 61 and a plurality of data lines 62.
Wherein the power module 11 is used to provide a signal source.
The driving module 13 is configured to provide scanning driving signals to the gate driving units GOA (1) to GOA (n), and further provide data driving signals to the data lines 62. The driving module 13 is connected to an input terminal of the gate driving unit, and an output terminal of the gate driving unit is connected to the scanning line 61. The driving module 13 is also connected to a data line 62.
The memory module 14 includes a first memory 141 and a second memory 142. When the power module 11 detects that the screen enters the screen-off state, on one hand, the time and date information in the first memory 141 and the picture information in the second memory 142 are retrieved and sent to the driving module 13, and on the other hand, the display control signal is output to the driving module 13 through the control module 12. The first Memory 141 is, for example, a Font Memory (Font Memory), and the second Memory 142 is, for example, a Frame Memory (Frame Memory).
The driving module 13 needs to drive the n gate driving units no matter the display screen is in the display state or in the screen-off state.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a driving circuit according to an embodiment of the invention.
As shown in fig. 3, the driving circuit 100 of the present embodiment includes a power module 10, a driving module 40, n gate driving units GOA (1) to GOA (n) connected in cascade, and a first control module 50. A second control module 20 and a storage module 30 may also be included.
The power supply module 10 comprises a first output terminal 17 and a second output terminal 18;
the second control module 20 comprises a third input 21 and a fourth output 22, the first output 21 being connected to the third input 17.
The input end 33 of the storage module 30 is connected to the second output end 18, and the output end 34 of the storage module 30 is connected to the second input end 43 of the driving module 40; in one embodiment, for the accuracy of the displayed information, the storage module 30 may include a first memory 31 and a second memory 32, wherein the first memory 31 is used for storing the setting information; the setting information includes time and date information, the time is 11:11 for example, and the date information is Monday for example. The second memory 32 is used for storing the first image information. The first image information is, for example, image information of a single color, preferably black.
The driving module 40 includes a first input terminal 41, n scan output terminals 42, a second input terminal 43, and a control output terminal 44; the first input 22 is connected to the fourth output 22, and the second input 43 is connected to an output of the memory module 30. The control output is for providing 44 a control signal S.
Each gate driving unit comprises a signal input end 71, a cascade output end 72, a cascade input end 73 and an output end 74, and the input end 71 of each gate driving unit is connected with the corresponding scanning output end 42; the output end 74 of the gate driving unit is connected with the corresponding scanning line 61; the gate driving units respectively correspond to the scanning lines 61 and the scanning output ends; wherein n is greater than or equal to 3, and 1 < k < n; the 1 st gate driving unit GOA (1) to the kth gate driving unit GOA (k) are cascaded, the cascade mode is that the cascade output end 72 of the previous gate driving unit is connected with the cascade input end 73 of the next gate driving unit GOA (n), and the cascade input end 73 of the GOA (1) is connected with the start signal. The (k +1) th to nth gate driving units GOA (k +1), (n) are cascaded with each other.
The first control module 50 is connected to the cascade output terminal 72 of the kth gate driving unit GOA (k) and the cascade input terminal 73 of the (k +1) th gate driving unit GOA (k + 1); when the display panel 60 is in the off state, the cascade output terminal 72 of the kth gate driving unit GOA (k) is disconnected from the cascade input terminal 73 of the (k +1) th gate driving unit GOA (k + 1); when the display screen 60 is in the display state, the cascade output terminal 72 of the kth gate driving unit GOA (k) is connected to the cascade input terminal 73 of the (k +1) th gate driving unit GOA (k + 1).
In one embodiment, to simplify the manufacturing process and reduce the production cost, the first control module 50 may include a switch element T, a control terminal of the switch element T is connected to the control output terminal 44 of the driving module 40, an input terminal of the switch element T is connected to the cascade output terminal 72 of the kth gate driving unit GOA (k), and an output terminal of the switch element T is connected to the cascade input terminal 73 of the (k +1) th gate driving unit GOA (k + 1). Of course, the structure of the first control module is not limited thereto. The switching element may be a transistor, and the specific type of the transistor is not limited.
In one embodiment, when the display panel 60 is in the off state, the level of the control signal S is a first level, so that the switching element T is turned off.
When the display screen 60 is in the display state, the level of the control signal S is the second level, so that the switch element T is closed. That is, the first level is used to turn off the switching element T; the first level is used to close the switching element T.
When the switching element is an N-type transistor, the first level is a low level and the second level is a high level. The switching element may also be a P-type transistor.
In a specific working process, when the display screen is in a display state, the power module 10 processes data information to be displayed into a displayable pixel voltage signal, and sends the pixel voltage signal to the driving module 40 through the control module 20; meanwhile, the power module 10 further sends a first indication signal, and the first indication signal also enters the driving module 40, at this time, the driving module 40 outputs a control signal according to the first indication signal, and the control signal is used for connecting the cascade output end of the GOA (K) with the cascade input end of the GOA (K +1), so that the level signal transmitted by the GOA (1) can be transmitted downwards until the GOA (n), and the whole display screen completes the display of the picture.
When the display screen 60 is in the off state, the power module 10 retrieves the time and date information to be displayed from the first memory 31 and retrieves the background picture with a single color from the second memory 32, and sends the background picture to the driving module 40; meanwhile, the power module 10 sends a second indication signal, and the second indication signal also enters the driving module 40, at this time, the driving module 40 outputs a control signal according to the second indication signal, where the control signal is used to disconnect the cascade output end of the GOA (K) from the cascade input end of the GOA (K +1), so that the level transmission signal is transmitted from the GOA (1) to the GOA (K) and then is not transmitted downward, and under the control of the output signals (scanning signals) from the GOA (1) to the GOA (K), the display regions corresponding to the GOA (1) to the GOA (K) display time and date information in the background of a single color. GOA (K +1) to GOA (n) are not output, so the corresponding display area of the part is not displayed, and the screen is also displayed in black. In one embodiment, the single color is black. That is, the whole screen displays black pictures at this time. It is to be understood that fig. 3 is only an example and is not intended to limit the present invention.
The invention also provides a driving method of the display screen, which is based on the driving circuit and comprises the following steps:
s101, when the display screen is in a screen-off state, controlling the cascade output end of the kth grid driving unit to be disconnected with the cascade input end of the (k +1) th grid driving unit;
for example, when the display panel 60 is in the off state, the cascade output terminal of the kth gate driving unit GOA (k) is controlled to be disconnected from the cascade input terminal of the (k +1) th gate driving unit GOA (k + 1); the cascade output end is used for outputting a transfer level signal, so that the level signal is not transferred downwards after being transferred from the GOA (1) to the GOA (K), namely the level signal cannot be transferred from the GOA (K) to the GOA (n), further pixels of the corresponding display area do not emit light, and the screen also displays black. The display area corresponding to the display area passed by GOA (1) to GOA (k) displays the time and date information in the background of a single color.
And S102, when the display screen is in a display state, controlling the cascade output end of the kth grid driving unit to be connected with the cascade input end of the (k +1) th grid driving unit.
When the display screen 60 is in a display state, controlling the cascade output end of the kth gate driving unit GOA (k) to be connected with the cascade input end of the (k +1) th gate driving unit GOA (k + 1); so that the level-pass signal is transmitted from GOA (1) to GOA (k) and then transmitted downward, i.e. so that GOA (k) to GOA (n) are cascaded, thereby the whole display area can display pictures.
In an embodiment, the cascade output terminal of the kth gate driving unit GOA (K) and the cascade input terminal of the (K +1) th gate driving unit GOA (K +1) may be controlled to be disconnected or connected by the control signal S. Wherein the control signal S may be provided by the driving module 40. The control signal S is generated from the output signal of the second control module 20.
The display screen 60 includes a first display area 63 and a second display area 64, and the kth gate driving unit goa (k) is connected to the kth scan line, wherein the kth scan line is located at the bottom of the first display area 63;
when the display screen 60 is in the screen-off state, the first display area 63 receives and displays first image information and setting display information; the first image information and the setting display information are specifically referred to above. The second display area 64 does not receive image information nor display it. When the display screen 60 is in the display state, the first display area 63 and the second display area 64 both receive and display the second image information, that is, the entire display screen receives and displays the second image information, which is the image information corresponding to the color display screen.
The invention also provides an electronic device which comprises any one of the driving circuits. The electronic device may further comprise a display screen. The display screen is preferably an Organic Light Emitting Diode (OLED) display screen. The electronic device can be intelligent wearable equipment, a smart phone, a tablet computer, a smart television and the like.
When the display screen is in a screen-off state, the cascade output end of the kth grid driving unit is controlled to be disconnected with the cascade input end of the (k +1) th grid driving unit by the first control module; therefore, the level-transmission signals are not transmitted downwards after being transmitted from the GOA (1) to the GOA (K), namely the level-transmission signals cannot be transmitted from the GOA (K) to the GOA (n) continuously, pixels of the corresponding display area do not emit light, and the display screen also displays black. The load of the driving circuit is reduced, thereby reducing the power consumption of the driving circuit.
The invention discloses a driving circuit, a driving method of a display screen and an electronic device, wherein the driving circuit comprises a first control module which is respectively connected with a cascade output end of a kth grid driving unit and a cascade input end of a (k +1) th grid driving unit; when the display screen is in a screen-off state, the cascade output end of the kth grid driving unit is disconnected with the cascade input end of the (k +1) th grid driving unit; when the display screen is in a display state, the cascade output end of the kth grid driving unit is connected with the cascade input end of the (k +1) th grid driving unit; therefore, the stage transmission signals are not transmitted downwards after being transmitted to the GOA (K) from the GOA (1), the load of the driving circuit is reduced, and the power consumption of the driving circuit is reduced.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (8)
1. A driving circuit, wherein the driving circuit is configured to drive a display screen, the display screen includes n scan lines, and the driving circuit includes:
the power supply module comprises a first output end and a second output end;
the driving module comprises a first input end, a second input end and n scanning output ends; the first input end is connected with the first output end;
the grid driving units comprise signal input ends, output ends, cascade input ends and cascade output ends, and the input ends of the grid driving units are connected with the corresponding scanning output ends; the output end of the grid driving unit is connected with the corresponding scanning line; the grid driving unit corresponds to the scanning line and the scanning output end respectively; wherein n is greater than or equal to 3, and 1 < k < n; the 1 st gate driving unit to the kth gate driving unit are mutually cascaded; the (k +1) th gate driving unit to the nth gate driving unit are mutually cascaded;
the first control module is respectively connected with the cascade output end of the kth grid driving unit and the cascade input end of the (k +1) th grid driving unit;
when the display screen is in a screen-off state, the cascade output end of the kth grid driving unit is disconnected with the cascade input end of the (k +1) th grid driving unit;
when the display screen is in a display state, the cascade output end of the kth grid driving unit is connected with the cascade input end of the (k +1) th grid driving unit;
the input end of the storage module is connected with the second output end, and the output end of the storage module is connected with the second input end of the driving module;
the storage module is used for storing display information in a screen-off state, and when the display screen is in the screen-off state, the display information is called and displayed on the display screen;
the display information in the screen extinguishing state comprises set character information and first image information;
the storage module comprises a first storage and a second storage, and the first storage is used for storing the set text information; the second memory is used for storing the first image information, and the first image information is a background picture with a single color.
2. The driving circuit according to claim 1, wherein the first control module comprises a switching element, a control terminal of the switching element is connected to a control output terminal of the driving module, an input terminal of the switching element is connected to the cascade output terminal of the kth gate driving unit, and an output terminal of the switching element is connected to the cascade input terminal of the (k +1) th gate driving unit.
3. The driving circuit according to claim 2, wherein the control output of the driving module is configured to provide a control signal;
when the display screen is in a screen-off state, the level of the control signal is a first level, and the first level is used for enabling the switch element to be disconnected;
when the display screen is in a display state, the level of the control signal is a second level, and the second level is used for enabling the switch element to be closed.
4. The drive circuit according to claim 1,
the driving circuit further comprises a second control module, the second control module comprises a third input end and a fourth output end, and the first output end is connected with the third input end; the first input end is connected with the fourth output end.
5. A method of driving a display screen, the method being based on a drive circuit as claimed in any one of claims 1 to 4, the method comprising:
when the display screen is in a screen-off state, controlling the cascade output end of the kth grid driving unit to be disconnected with the cascade input end of the (k +1) th grid driving unit;
and when the display screen is in a display state, controlling the cascade output end of the kth grid driving unit to be connected with the cascade input end of the (k +1) th grid driving unit.
6. The display panel driving method according to claim 5,
and controlling the cascade output end of the kth grid driving unit to be disconnected or connected with the cascade input end of the (k +1) th grid driving unit through the control signal.
7. The method for driving the display panel according to claim 6, wherein the display panel comprises a first display area and a second display area, the kth gate driving unit is connected with a kth scanning line, and the kth scanning line is located at the bottom of the first display area;
when the display screen is in a screen-off state, the first display area receives and displays first image information and set character information;
when the display screen is in a display state, the first display area and the second display area both receive and display second image information.
8. An electronic device, comprising the drive circuit according to any one of claims 1 to 4.
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| TWI425471B (en) * | 2011-06-17 | 2014-02-01 | Au Optronics Corp | Display panel and gate driving circuit thereof and driving method for gate driving circuit |
| CN103680439B (en) * | 2013-11-27 | 2016-03-16 | 合肥京东方光电科技有限公司 | A kind of gate driver circuit and display device |
| CN105448226B (en) * | 2016-01-12 | 2018-03-16 | 京东方科技集团股份有限公司 | A kind of gate driving circuit and display device |
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| CN106782258A (en) * | 2015-11-19 | 2017-05-31 | 小米科技有限责任公司 | Display screen, display device and display methods |
| CN105513556A (en) * | 2016-02-19 | 2016-04-20 | 武汉天马微电子有限公司 | Grid driving circuit, display panel and display device |
| CN107016953A (en) * | 2017-05-22 | 2017-08-04 | 武汉天马微电子有限公司 | Display panel driving method, display panel and display device |
| CN108231029A (en) * | 2018-01-29 | 2018-06-29 | 京东方科技集团股份有限公司 | Gate driving circuit, display device and driving method |
| CN110246448A (en) * | 2018-08-10 | 2019-09-17 | 友达光电股份有限公司 | Circuit of display driving |
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