CN214624393U - OLED grid driving circuit, display panel driving device and display device - Google Patents
OLED grid driving circuit, display panel driving device and display device Download PDFInfo
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- CN214624393U CN214624393U CN202120602995.4U CN202120602995U CN214624393U CN 214624393 U CN214624393 U CN 214624393U CN 202120602995 U CN202120602995 U CN 202120602995U CN 214624393 U CN214624393 U CN 214624393U
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Abstract
The utility model discloses a OLED gate drive circuit, display panel drive arrangement and display device, wherein, OLED gate drive circuit includes: the grid charging and discharging driving circuit is arranged in a non-display area of the display panel and is provided with a plurality of output ends; the delay conversion unit is arranged in a display area of the display panel, each output end of the grid charging and discharging driving circuit is electrically connected with the delay conversion unit through a signal line, and the delay conversion unit is used for receiving a plurality of scanning signals output by the grid charging and discharging driving circuit through a plurality of signal lines, outputting a plurality of first output signals and converting the plurality of second output signals through the delay circuit to be transmitted to the display area of the display panel. The OLED grid driving circuit simplifies the circuit wiring of the display panel through a grid charging and discharging driving circuit and the arrangement of the time delay conversion unit, so that the frame of the display panel is narrowed, and the hardware cost is saved.
Description
Technical Field
The utility model relates to a display panel technical field, in particular to OLED gate drive circuit, display panel drive arrangement and display device.
Background
An Organic Light Emitting Diode (OLED) Display has many advantages of self-luminescence, low driving voltage, high luminous efficiency, short response time, high definition and contrast, a viewing angle of approximately 180 °, a wide temperature range, flexible Display, large-area full-color Display, and the like, and is considered as a Display with the most potential for development in the industry.
However, at present, the gate charging driving Circuit and the gate discharging driving Circuit in the OLED gate driving Circuit are respectively disposed at two sides of the display panel and are implemented by different gate driving Integrated Circuits (ICs). That is, the OLED gate driving circuit needs two gate driving integrated circuits to implement, and peripheral circuits of the display panel need to be added, which may cause the frame of the display panel to be widened, and the hardware cost to be high.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a OLED gate drive circuit, this circuit only adopt a gate drive integrated circuit, cooperate simple peripheral circuit can realize gate drive circuit's the process of charging and discharging, simplify panel wiring circuit, make the panel frame narrow down to save the hardware cost.
In order to achieve the above object, the present invention provides an OLED gate driving circuit, the OLED gate driving circuit includes:
the grid charging and discharging driving circuit is arranged in a non-display area of the display panel and is provided with a plurality of output ends;
the time delay conversion unit is used for being arranged in a display area of the display panel, each output end of the grid charging and discharging driving circuit is electrically connected with the time delay conversion unit through a signal line, and the time delay conversion unit is used for receiving a plurality of scanning signals output by the grid charging and discharging driving circuit through a plurality of signal lines, outputting a plurality of first output signals and outputting a plurality of second output signals through time delay circuit conversion to be transmitted to the display area of the display panel.
Optionally, the delay converting unit includes a plurality of signal converting circuits;
each signal conversion circuit comprises a delay circuit, the input end of each signal conversion circuit is a signal input port of the delay conversion unit for receiving scanning signals, and the first output end of each signal conversion circuit is connected with a signal input port of the delay conversion unit for receiving scanning signals so as to output a first output signal; the output end of the delay circuit is a second output end of the signal conversion circuit to output a second output signal.
Optionally, the periods of the first output signal and the second output signal are both equal to the periods of the scanning signals corresponding to the first output signal and the second output signal, and the pulses of the first output signal and the second output signal are respectively synchronized with the pulses of the scanning signals corresponding to the first output signal and the second output signal; the pulse positions of the first output signal and the second output signal do not overlap with each other.
Optionally, a delay period of the delay circuit is equal to a period of the scan signal corresponding to the first output signal and the second output signal.
Optionally, the delay time in the delay circuit is equal to the scan on time of the scan signal corresponding to the first output signal and the second output signal.
Optionally, one of the first output signal and the second output signal is used as a charging scan signal, and the other is used as a discharging scan signal.
Optionally, the OLED gate driving circuit further includes:
and the source electrode driving circuit is connected with the display panel and provides data signals for the display panel.
The utility model also provides a display panel driving device, which comprises an OLED grid driving circuit,
the OLED gate driving circuit includes:
the grid charging and discharging driving circuit is arranged in a non-display area of the display panel and is provided with a plurality of output ends;
the time delay conversion unit is used for being arranged in a display area of the display panel, each output end of the grid charging and discharging driving circuit is electrically connected with the time delay conversion unit through a signal line, and the time delay conversion unit is used for receiving a plurality of scanning signals output by the grid charging and discharging driving circuit through a plurality of signal lines, outputting a plurality of first output signals and outputting a plurality of second output signals through time delay circuit conversion to be transmitted to the display area of the display panel.
The utility model also provides a display device, which comprises a display panel and a display panel driving device;
the display panel driving device comprises an OLED grid driving circuit;
the OLED gate driving circuit includes:
the grid charging and discharging driving circuit is arranged in a non-display area of the display panel and is provided with a plurality of output ends;
the time delay conversion unit is used for being arranged in a display area of the display panel, each output end of the grid charging and discharging driving circuit is electrically connected with the time delay conversion unit through a signal line, and the time delay conversion unit is used for receiving a plurality of scanning signals output by the grid charging and discharging driving circuit through a plurality of signal lines, outputting a plurality of first output signals and outputting a plurality of second output signals through time delay circuit conversion to be transmitted to the display area of the display panel.
Optionally, the display area of the display panel is further provided with a plurality of pixel driving circuits arranged in an array, and each pixel driving circuit includes a capacitor and three thin film transistors.
The utility model discloses technical scheme has constituteed OLED gate drive circuit through adopting display panel, gate charge-discharge drive circuit, time delay converting unit etc. OLED gate drive circuit is arranged in exporting simulation grey scale voltage signal to the inside pixel unit of display panel. According to the scheme, the grid charging and discharging driving circuit is arranged in the non-display area of the display panel, the time delay conversion unit electrically connected with the grid charging and discharging driving circuit is matched, the scanning signal is converted into the discharging scanning signal or the charging scanning signal through the time delay conversion unit and is provided for the display area of the display panel, the charging and discharging process of the OLED grid driving circuit can be realized only by adopting one grid charging and discharging driving circuit, and the problems that the grid charging driving circuit and the grid discharging driving circuit are required to be respectively arranged in the left non-display area and the right non-display area of the display panel, different grid driving integrated circuits are required to realize, and the grid driving integrated circuit is relatively complex in the related technology are solved; the scheme adopts the grid drive integrated circuit, the grid drive integrated circuit and the delay conversion unit are simple in circuit structure, circuit wiring of the display panel can be simplified, the frame of the display panel is narrowed, and hardware cost is saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be 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 some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic diagram of a module structure of an embodiment of the OLED gate driving circuit of the present invention;
fig. 2 is a schematic diagram of the distribution of pixel units in an embodiment of the OLED gate driving circuit of the present invention;
fig. 3 is a schematic circuit structure diagram of an embodiment of a signal conversion circuit in the OLED gate driving circuit of the present invention;
FIG. 4 is a waveform diagram illustrating an embodiment of the signal conversion circuit shown in FIG. 3;
fig. 5 is a schematic diagram of a module structure of an embodiment of the display panel driving apparatus of the present invention;
fig. 6 is a schematic diagram of a module structure of an embodiment of the display device of the present invention.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that the description relating to "first", "second", etc. in the present invention is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is: the method comprises three parallel schemes, wherein the scheme is taken as an A/B (A/B) as an example, the scheme comprises a scheme A, a scheme B or a scheme A and a scheme B which are simultaneously met, in addition, the technical schemes between the various embodiments can be combined with each other, but the technical schemes must be realized by a person with ordinary skill in the art as a basis, and when the technical schemes are mutually contradictory or can not be realized, the combination of the technical schemes is not considered to exist, and the protection scope of the invention is not within the protection scope of the invention.
The utility model provides a pair of OLED grid drive circuit for provide simulation grey scale voltage signal to display panel.
As shown in fig. 1 and fig. 2, fig. 1 is a schematic block diagram of an embodiment of the OLED gate driving circuit of the present invention, fig. 2 is a schematic block diagram of a Pixel unit distribution in an embodiment of the OLED gate driving circuit of the present invention, the display panel includes a plurality of scanning lines and a plurality of data lines, the plurality of scanning lines and the plurality of data lines constitute a plurality of Pixel units, a plurality of the Pixel units are divided into M first Pixel units Pixel 1 and N second Pixel units Pixel 2, and the first Pixel units Pixel 1 and the second Pixel units Pixel 2 are sequentially arranged in a staggered manner in a row direction and a column direction.
The utility model provides an OLED grid electrode driving circuit framework, which comprises a grid electrode charging and discharging driving circuit 20, a time delay conversion unit 30 and a source electrode driving circuit 40; the gate charging and discharging driving circuit 20 is configured to be disposed in a non-display region of the display panel 10, the gate charging and discharging driving circuit 20 is provided with a plurality of output terminals, and each output terminal is electrically connected to the delay converting unit 30 through a signal line; the delay converting unit 30 is disposed in the display area of the display panel 10, and the delay converting unit 30 receives a plurality of scanning signals transmitted from the gate charge-discharge driving circuit 20 through a plurality of signal lines, i.e., G1 to G in fig. 1nAnd directly outputs a plurality of first output signals and outputs a plurality of second output signals through the plurality of delay circuits 31 in the delay converting unit 30, and the signals are transmitted to the display area of the display panel 10, that is, the scanning signals are converted into discharging scanning signals and charging scanning signals and provided to the display area of the display panel 10; the source driving circuit 40 is connected to the display panel 10 and provides a data signal to the display panel 10.
Specifically, the gate charging/discharging driving circuit 20 may be formed by a gate driving IC, and the display panel 10 includes a plurality of pixel driving circuits arranged in an array, where each pixel driving circuit includes a capacitor and three thin film transistors. Furthermore, the pixel driving circuit comprises a first thin film transistor, a second thin film transistor, a third thin film transistor and a capacitor. The first thin film transistor is a charging thin film transistor, and is used for controlling the charging of the organic light emitting diode OLED in the display area on the display panel, and the charging scanning signal directly output by the gate charging and discharging driving circuit 20 received via the signal line is provided to the first thin film transistor, that is, the charging of the display panel 10 can be controlled; the second thin film transistor is a driving thin film transistor; the third thin film transistor is a discharging thin film transistor, and the discharging scanning signal converted by the delay conversion unit 30 from the scanning signal output by the gate charging/discharging driving circuit 20 is provided to the third thin film transistor, so that the discharging of the display panel 10 can be controlled. Or the discharge scanning signal directly output by the gate charge-discharge driving circuit 20 received via the signal line is provided to the third thin film transistor, that is, the discharge to the display panel 10 can be controlled; the second thin film transistor is a driving thin film transistor; the third thin film transistor is a discharging thin film transistor, and the charging scanning signal converted by the delay conversion unit 30 from the scanning signal output by the gate charging/discharging driving circuit 20 is provided to the first thin film transistor, so that the charging of the display panel 10 can be controlled.
In the present embodiment, the display panel 10 includes, but is not limited to, a transparent OLED panel, a top-emitting OLED panel, a foldable OLED panel, a white OLED panel, and the like. Transparent OLED panels have only transparent components (e.g., substrate, anode, cathode). When the transparent OLED panel is powered on, light can pass through in both directions. The transparent OLED panel may employ either a passive matrix or an active matrix. The top-emitting OLED panel has an opaque or reflective base layer, suitable for use with an active matrix design. The substrate of the foldable OLED panel is made of a very flexible metal foil or plastic. Can be used for mobile phones, wearable devices, computers and other equipment.
In this embodiment, as can be understood by those skilled in the art, the gate driving circuit in the related art includes a gate charging driving circuit and a gate discharging driving circuit, and the gate charging driving circuit and the gate discharging driving circuit are respectively disposed in the non-display area on the side of the display panel 10 to respectively convert the charging scanning signal and the discharging scanning signal; the gate charge driving circuit and the gate discharge driving circuit need to be implemented by different gate driving integrated circuits. In the present embodiment, the gate charging circuit and the gate discharging circuit are combined, and only one gate charging/discharging driving circuit 20 is used to output a plurality of scanning signals to the delay converting unit 30 through a plurality of output terminals for direct output, or output after delay conversion by the delay converting unit 30, so as to provide the scanning signals to the display panel 10.
Specifically, the delay converting unit 30 converts the plurality of scan signals output by the gate charging/discharging driving circuit 20 into a plurality of charging scan signals to control charging of the display panel 10, or into a plurality of discharging scan signals to control discharging of the display panel 10. That is, only one gate driving integrated circuit is needed in the scheme, and the delay conversion unit 30 is combined, so that the circuit structure of the gate driving integrated circuit is simple, the circuit wiring of the display panel 10 is simplified, the frame of the display panel 10 is narrowed, and the hardware cost is saved.
The utility model discloses technical scheme has constituteed OLED gate drive circuit through adopting display panel 10, gate charge-discharge drive circuit 20, time delay converting unit 30 etc. OLED gate drive circuit is arranged in exporting simulation grey scale voltage signal to the inside pixel element of display panel 10. According to the scheme, the grid charging and discharging driving circuit 20 arranged in the non-display area of the display panel 10 is matched with the time delay conversion unit 30 electrically connected with the grid charging and discharging driving circuit 20, the scanning signals are converted into the discharging scanning signals or the charging scanning signals through the time delay conversion unit 30 and are provided for the display area of the display panel 10, the charging and discharging processes of the OLED grid driving circuit can be realized only by adopting one grid charging and discharging driving circuit 20, and the problems that in the related technology, the grid charging driving circuit and the grid discharging driving circuit are required to be respectively arranged in the left non-display area and the right non-display area of the display panel 10, different grid driving integrated circuits are required to be realized, and the grid driving integrated circuits are relatively complex are solved; the scheme adopts a grid drive integrated circuit, the grid drive integrated circuit and the delay conversion unit 30 have simple circuit structures, and can simplify the circuit wiring of the display panel 10, narrow the frame of the display panel 10 and save the hardware cost.
Further, in an embodiment, referring to fig. 3, the delay converting unit 30 includes a plurality of signal converting circuits 32;
each of the signal conversion circuits 32 includes a delay circuit 31, an input terminal of each of the signal conversion circuits 32 is a signal input port of the delay conversion unit 30 for receiving the scan signal, and a first output terminal of each of the signal conversion circuits 32 is connected to a signal input port of the delay conversion unit 30 for receiving the scan signal to output a first output signal; the output terminal of the delay circuit 31 is a second output terminal of the signal conversion circuit 32 to output a second output signal.
In this embodiment, the delay converting unit 30 includes a plurality of signal converting circuits 32, each signal converting circuit 32 has a delay circuit 31, each output terminal of the gate charge/discharge driving circuit is connected to an input terminal of a delay circuit 31 in the delay converting unit 30, and the delay circuit 31 may include a counter, an amplifier, an oscillator and other elements known in the art, so as to convert the scan signal output by the gate charge/discharge driving circuit 20, so that the delay converting unit 30 outputs a plurality of first output signals and a plurality of second output signals. It should be noted that, in the present embodiment, the plurality of second output signals output by the delay converting unit 30 need to be converted and output by the delay circuit 31 in each signal converting circuit 32. That is, when the first output signals output by the delay converting unit 30 are charging scan signals of the display panel, the second output signals output by the delay converting unit 30 are discharging scan signals of the display panel; when the first output signals output by the delay converting unit 30 are discharging scan signals, the second output signals output by the delay converting unit 30 are charging scan signals.
In the present embodiment, the OLED gate driving circuit outputs the scanning signals to the delay converting unit 30 in the display panel 10 through one gate charging/discharging driving circuit 20, and the plurality of input scanning signals can be converted into a plurality of discharging scanning signals and a plurality of charging scanning signals to be provided to the display panel 10 by matching with the delay circuits 31 respectively provided in the plurality of signal converting circuits 32 in the delay converting unit 30. Only one gate driving integrated circuit and one delay conversion unit 30 including a plurality of delay circuits 31 are needed, so that the circuit structures of the gate driving integrated circuit and the delay conversion unit 30 are simple, the circuit wiring of the display panel 10 can be simplified, the frame of the display panel 10 is narrowed, and the hardware cost is saved.
Further, referring to fig. 4, the delay converting unit 30 inputs a scan signal Gate _ in, the periods of the first output signal out1 and the second output signal out2 are both equal to the periods of the scan signals corresponding to the first output signal and the second output signal, the delay time in the delay circuit 31 is equal to the scan on time of the scan signals corresponding to the first output signal and the second output signal, and the pulses of the first output signal and the second output signal are synchronized with the pulses of the scan signals corresponding to the first output signal and the second output signal, respectively. The pulse positions of the first output signal and the second output signal are not overlapped with each other, that is, the period of the charging scanning signal, the period of the discharging scanning signal and the period of the scanning signal are equal, the pulse positions of the charging scanning signal and the discharging scanning signal are not overlapped with each other, so that one output signal is charged to the display panel 10, and one output signal is discharged to the display panel 10, so that the charging and discharging are separated conveniently.
According to the design timing, each signal conversion circuit 32 outputs a first output signal out1 and a second output signal out2, respectively, the delay period of the delay circuit 31 in the control signal conversion circuit 32 is equal to the period of the scan signal corresponding to the first output signal and the second output signal, that is, the delay period of the delay circuit 31 is controlled to be t1, the first output signal out1 directly output through each signal conversion circuit 32 in the delay conversion unit 30 is transmitted to the display area of the display panel 10, and the first output signal out1 is output to the display area of the display panel 10 after being converted by each delay circuit 31 in the delay conversion unit 30. One of the first output signal and the second output signal is used as a charging scanning signal, and the other one is used as a discharging scanning signal.
Furthermore, the present invention also provides a display panel driving device, referring to fig. 5, the display panel driving device 50 includes an OLED gate driving circuit 40, the OLED gate driving circuit includes:
the display device comprises a gate charging and discharging driving circuit 20, wherein the gate charging and discharging driving circuit 20 is arranged in a non-display area of the display panel 10, and the gate charging and discharging driving circuit 20 is provided with a plurality of output ends;
the delay conversion unit 30 is configured to be disposed in a display area of the display panel 10, each output end of the gate charging and discharging driving circuit 20 is electrically connected to the delay conversion unit 30 through a signal line, and the delay conversion unit 30 is configured to receive a plurality of scanning signals output by the gate charging and discharging driving circuit 20 through a plurality of signal lines, output a plurality of first output signals, and convert and output a plurality of second output signals through the delay circuit 31 to be transmitted to the display area of the display panel 10. It can be understood that, because the OLED gate driving circuit 40 is used in the display panel driving device 50, embodiments of the display panel driving device 50 include all technical solutions of all embodiments of the OLED gate driving circuit 40, and the achieved technical effects are also completely the same, and are not described herein again.
Furthermore, the present invention further provides a display device, referring to fig. 6, the display device 60 includes a display panel 10 and a display panel driving device 50, and the display panel driving device 50 includes the OLED gate driving circuit, so that all the technical solutions of all the embodiments of the OLED gate driving circuit in the display panel driving device 50 are also provided, and the achieved technical effects are also completely the same, and are not repeated herein. The display device may be a general monitor, a flat panel television, or the like, or may be a liquid crystal display or a liquid crystal television.
The above is only the optional embodiment of the present invention, and not therefore the limit of the patent scope of the present invention, all of which are in the concept of the present invention, the equivalent structure transformation of the content of the specification and the drawings is utilized, or the direct/indirect application is included in other related technical fields in the patent protection scope of the present invention.
Claims (9)
1. An OLED gate driving circuit for providing analog gray scale voltage signals to a display area of a display panel, the OLED gate driving circuit comprising:
the grid charging and discharging driving circuit is arranged in a non-display area of the display panel and is provided with a plurality of output ends;
the time delay conversion unit is used for being arranged in a display area of the display panel, each output end of the grid charging and discharging driving circuit is electrically connected with the time delay conversion unit through a signal line, and the time delay conversion unit is used for receiving a plurality of scanning signals output by the grid charging and discharging driving circuit through a plurality of signal lines, outputting a plurality of first output signals and outputting a plurality of second output signals through conversion of the time delay circuit to be transmitted to the display area of the display panel;
the delay conversion unit comprises a plurality of signal conversion circuits;
each signal conversion circuit comprises a delay circuit, the input end of each signal conversion circuit is a signal input port of the delay conversion unit for receiving scanning signals, and the first output end of each signal conversion circuit is connected with a signal input port of the delay conversion unit for receiving scanning signals so as to output a first output signal; the output end of the delay circuit is a second output end of the signal conversion circuit to output a second output signal.
2. The OLED gate drive circuit of claim 1, wherein the first output signal and the second output signal each have a period equal to a period of the scan signal to which the first output signal and the second output signal correspond.
3. The OLED gate driving circuit of claim 2, wherein pulses of the first and second output signals are synchronized with pulses of the scan signals corresponding to the first and second output signals, respectively; the pulse positions of the first output signal and the second output signal do not overlap with each other.
4. The OLED gate drive circuit of claim 3, wherein the delay circuit has a delay period equal to a period of the scan signal corresponding to the first and second output signals.
5. The OLED gate drive circuit of claim 4, wherein the delay time in the delay circuit is equal to a scan-on time of the scan signal corresponding to the first output signal and the second output signal.
6. The OLED gate driving circuit of claim 5, wherein one of the first output signal and the second output signal serves as a charging scan signal, and the other serves as a discharging scan signal.
7. A display panel driving device is characterized by comprising an OLED grid driving circuit;
the OLED gate driving circuit includes:
the grid charging and discharging driving circuit is arranged in a non-display area of the display panel and is provided with a plurality of output ends;
the time delay conversion unit is used for being arranged in a display area of the display panel, each output end of the grid charging and discharging driving circuit is electrically connected with the time delay conversion unit through a signal line, and the time delay conversion unit is used for receiving a plurality of scanning signals output by the grid charging and discharging driving circuit through a plurality of signal lines, outputting a plurality of first output signals and outputting a plurality of second output signals through time delay circuit conversion to be transmitted to the display area of the display panel.
8. A display device is characterized by comprising a display panel and a display panel driving device;
the display panel driving device comprises an OLED grid driving circuit;
the OLED gate driving circuit includes:
the grid charging and discharging driving circuit is arranged in a non-display area of the display panel and is provided with a plurality of output ends;
the time delay conversion unit is used for being arranged in a display area of the display panel, each output end of the grid charging and discharging driving circuit is electrically connected with the time delay conversion unit through a signal line, and the time delay conversion unit is used for receiving a plurality of scanning signals output by the grid charging and discharging driving circuit through a plurality of signal lines, outputting a plurality of first output signals and outputting a plurality of second output signals through time delay circuit conversion to be transmitted to the display area of the display panel.
9. The display device according to claim 8, wherein the display area of the display panel is further provided with a plurality of pixel driving circuits arranged in an array, each pixel driving circuit comprising a capacitor and three thin film transistors.
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| CN112908268A (en) * | 2021-03-24 | 2021-06-04 | 重庆惠科金渝光电科技有限公司 | OLED grid driving circuit, display panel driving device and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112908268A (en) * | 2021-03-24 | 2021-06-04 | 重庆惠科金渝光电科技有限公司 | OLED grid driving circuit, display panel driving device and display device |
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