CN114399970A - Scanning drive unit and display device - Google Patents

Scanning drive unit and display device Download PDF

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Publication number
CN114399970A
CN114399970A CN202210210743.6A CN202210210743A CN114399970A CN 114399970 A CN114399970 A CN 114399970A CN 202210210743 A CN202210210743 A CN 202210210743A CN 114399970 A CN114399970 A CN 114399970A
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China
Prior art keywords
signal
scanning
scan
driving unit
level signal
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Inventor
章凯迪
林柏全
李伟
白云飞
王林志
席克瑞
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Shanghai Tianma Microelectronics Co Ltd
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Shanghai Tianma Microelectronics Co Ltd
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Priority to CN202210210743.6A priority Critical patent/CN114399970A/en
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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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0286—Details of a shift registers arranged for use in a driving circuit

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Computer Hardware Design (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The application provides a scanning driving unit and a display device, and relates to the technical field of display; the scanning driving unit comprises at least 1 input end and at least 2 output ends; at least part of the output ends are respectively and electrically connected with 1 scanning line; the input ends of the scanning driving unit are respectively applied with a first level signal and/or a second level signal so as to control one output end of the scanning driving unit to transmit scanning signals to the scanning lines electrically connected with the output end of the scanning driving unit; the first level signal and the second level signal are respectively a non-enable signal and an enable signal; thereby realizing 2 using a signal input endsaThe scanning mode can be flexibly changed by scanning the line signals with the internal number, so that the display device can be suitable for conventional display and various unconventional displays.

Description

Scanning drive unit and display device
Technical Field
The present invention relates to the field of display technologies, and in particular, to a scan driving unit and a display device.
Background
In the prior art, the gate voltage of a line scanning signal of a general display substrate is turned on line by line, and a corresponding signal is input to a corresponding line of pixels in each line period, so that the line by line refreshing of a pixel electrode array is realized. For a large-scale array, an existing on-chip line scanning signal generation method is to Shift each line signal based on a previous line signal through a VSR (Shift Register) circuit, so as to realize line-by-line scanning output.
For large-scale pixel arrays, the number of row scan signals is large, and if the row scan signals are generated by using an external circuit IC (Integrated circuit), additional cost is increased, and the control method of the row scan signals is complicated or has high cost; if a VSR circuit is used, each line needs to be based on a previous line signal, the fault tolerance rate is low, only line-by-line scanning is available, intermittent or line-skipping scanning cannot be achieved, and scanning control is not flexible enough.
Disclosure of Invention
In view of the above, the present invention provides a scan driving unit and a display device, so as to improve the flexibility of the scan control method and reduce the cost of the scan driving unit.
In a first aspect, the present application provides a scan driving unit, which includes at least 1 input terminal, at least 2 output terminals; at least part of the output ends are respectively and electrically connected with 1 scanning line;
a first level signal and/or a second level signal are/is applied to each input end of the scanning driving unit respectively so as to control one output end of the scanning driving unit to transmit scanning signals to the scanning lines electrically connected with the output end of the scanning driving unit;
wherein the first level signal and the second level signal are a non-enable signal and an enable signal, respectively.
In a second aspect, the present application provides a display device comprising:
a display panel having a plurality of scan lines;
a scan driving unit configured to supply a scan signal to the scan lines.
Compared with the prior art, the scanning driving unit and the display device provided by the invention at least realize the following beneficial effects:
the application provides a scanning driving unit and a display device, wherein the scanning driving unit comprises at least 1 input end and at least 2 output ends, and each output end can select 1 scanning line to be electrically connected; applying a first level signal and/or a second level signal to each input end so as to control 1 output end of the scanning driving unit to transmit scanning signals to the scanning lines electrically connected with the output end of the scanning driving unit; that is, different first level signals and/or second level signals are input to the input ends, and the transmission of scanning signals to the scanning lines corresponding to the types of the input signals of the input ends is controlled, so that the transmission of the scanning signals is not limited to a progressive scanning mode, the flexibility of the transmission of the scanning signals is improved, the requirements of different application scenes are met, the cost of realizing the scanning mode is low, and the manufacturing cost of the corresponding display device cannot be increased.
Of course, it is not necessary for any product in which the present invention is practiced to achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic diagram illustrating an electrical connection between scan lines of a scan driving unit according to an embodiment of the present disclosure;
fig. 2 is another schematic diagram of a scan driving unit electrically connected to a scan line according to an embodiment of the present disclosure;
fig. 3 is another schematic diagram of a scan driving unit electrically connected to a scan line according to an embodiment of the present disclosure;
fig. 4 is a diagram illustrating a correspondence relationship between a scan driving unit provided in an embodiment of the present application and including 3 input terminals and 8 output terminals;
FIG. 5 is a timing circuit diagram corresponding to FIG. 4 according to an embodiment of the present disclosure;
fig. 6 is a circuit structure diagram corresponding to fig. 4 according to an embodiment of the present disclosure;
fig. 7 is a diagram illustrating another corresponding relationship between a scan driving unit provided in the embodiment of the present application and including 3 input terminals and 8 output terminals;
FIG. 8 is a timing circuit diagram corresponding to FIG. 7 according to an embodiment of the present disclosure;
fig. 9 is another schematic diagram of a scan driving unit electrically connected to a scan line according to an embodiment of the present disclosure;
fig. 10 is a diagram illustrating a corresponding relationship between an input end and an output end of fig. 9 according to an embodiment of the present application;
FIG. 11 is a timing circuit diagram corresponding to FIG. 9 according to an embodiment of the present disclosure;
fig. 12 is another schematic diagram illustrating an electrical connection between scan lines and a scan driving unit according to an embodiment of the present disclosure;
fig. 13 is another schematic diagram of a scan driving unit electrically connected to a scan line according to an embodiment of the present disclosure;
fig. 14 is a diagram illustrating a corresponding relationship between an input end and an output end of fig. 13 according to an embodiment of the present application;
FIG. 15 is a timing circuit diagram corresponding to FIG. 13 according to an embodiment of the present application;
fig. 16 is a schematic diagram of a scan driving unit provided in an embodiment of the present application, including a first type of scan driving unit and a second type of scan driving unit;
FIG. 17 is a timing diagram of the embodiment of the present application corresponding to FIG. 16;
fig. 18 is a schematic diagram of a scan driving unit including a frequency divider according to an embodiment of the present application;
fig. 19 is a schematic diagram illustrating an internal structure of a frequency divider according to an embodiment of the present application;
FIG. 20 is a timing diagram of the corresponding input terminal of FIG. 18 according to an embodiment of the present application;
fig. 21 is a schematic diagram of a scan driving unit including a buffer according to an embodiment of the present application;
fig. 22 is a schematic view of a display device according to an embodiment of the present disclosure.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the prior art, for a large-scale pixel array, the number of line scan signals is large, and if the line scan signals are generated by using an external circuit IC (Integrated circuit) or the like, additional cost is increased, and the control method of the line scan signals is complicated or has high cost; if a VSR circuit is used, each line needs to be based on a previous line signal, the fault tolerance rate is low, only line-by-line scanning is achieved, line-skipping scanning cannot be interrupted, and scanning control is not flexible enough.
In view of the above, the present invention provides a scan driving unit and a display device, so as to improve the flexibility of the scan control method and reduce the cost of the scan driving unit.
Fig. 1 is a schematic diagram illustrating a scan driving unit electrically connected to a scan line according to an embodiment of the present disclosure, fig. 2 is another schematic diagram illustrating the scan driving unit electrically connected to the scan line according to the embodiment of the present disclosure, fig. 3 is another schematic diagram illustrating the scan driving unit electrically connected to the scan line according to the embodiment of the present disclosure, fig. 4 is a corresponding relationship diagram illustrating the scan driving unit provided according to the embodiment of the present disclosure including 3 input terminals and 8 output terminals, please refer to fig. 1 to 4, the present disclosure provides a scan driving unit 100, and the scan driving unit 100 includes at least 1 input terminal X and at least 2 output terminals G; at least part of the output ends G are respectively and electrically connected with 1 scanning line 10;
the input ends X of the scan driving unit 100 are applied with a first level signal and/or a second level signal, respectively, to control one output end G of the scan driving unit 100 to transmit a scan signal to the scan line 10 electrically connected thereto;
the first level signal and the second level signal are respectively a non-enable signal and an enable signal.
Specifically, the present application provides a scan driving unit 100, where the scan driving unit 100 includes a smaller number of input terminals X and a larger number of output terminals G than the number of input terminals X, and specifically, the scan driving unit 100 may include at least 1 input terminal X, including at least 2 output terminals G; wherein when the scan driving unit 100 is provided with a input terminals X, it may be correspondingly provided with at most 2aAnd an output terminal G. In the present application, each output terminal G of each scan driving unit 100 can be selectively electrically connected to 1 different scan line 10; it is also possible to provide that part of the output terminals G in each scan driving unit 100 are electrically connected to different 1 scan line 10, and another part of the output terminals G are in an idle state and are not used.
In the present application, the output end G included in each scan driving unit 100 is respectively electrically connected to 1 scan line 10, or only a part of the output ends G are respectively electrically connected to 1 scan line 10, the two selectable setting manners are not specifically limited, and a user can make a corresponding selection according to a specific use requirement.
A first level signal and/or a second level signal are applied to the input terminal X of each scan driving unit 100, where the first level signal may be a low level signal, for example, and the second level signal may be a high level signal, for example. It should be added that the above-mentioned "non-enable signal" refers to a low level signal, and the "enable signal" refers to a high level signal; the "disable signal" does not mean that no electrical signal is input, but is a relatively low-level signal.
Referring to fig. 1, an alternative embodiment is provided, for example, a scan driving unit 100 provided in the present application includes 1 input terminal X and 2 output terminals G, which can be configured such that when a first level signal (e.g. a low level signal) is applied to the input terminal X, the 1 st output terminal G1 outputs a scan signal to the 1 st row of scan lines 10 electrically connected thereto; when the input terminal X is applied with a second level signal (e.g., a high level signal), the 2 nd output terminal G2 outputs a scan signal to the 2 nd row scan line 10 to which it is electrically connected. It should be noted that, when the first level signal is set to be a low level signal, outputting a scan signal to the 1 st row of scan lines is an embodiment; in another embodiment, a person skilled in the art may also set the first level signal to be a high level signal, and correspondingly output the scan signal to the scan line of row 1. The correspondence relationship between the number of rows of scanning lines and the high level/low level is not limited in the present invention.
Referring to fig. 2, another alternative embodiment is provided, for example, the scan driving unit 100 provided in the present application includes 2 input terminals X and 4 output terminals G, and may be configured such that when the 1 st input terminal X1 and the 2 nd input terminal X2 are both applied with a first level signal (e.g., a low level signal), the 1 st output terminal G1 outputs a scan signal to the 1 st row scan line 10 electrically connected thereto; when the 1 st input terminal X1 is applied with a first level signal (e.g., a low level signal) and the 2 nd input terminal X2 is applied with a second level signal (e.g., a high level signal), the 2 nd output terminal G2 outputs a scan signal to the 2 nd row of scan lines 10 electrically connected thereto; when the 1 st input terminal X1 is applied with the second level signal (e.g., high level signal) and the 2 nd input terminal X2 is applied with the first level signal (e.g., low level signal), the 3 rd output terminal G3 outputs the scan signal to the 3 rd row of scan lines 10 electrically connected thereto; when the 1 st input terminal X1 is applied with a second level signal (e.g., a high level signal) and the 2 nd input terminal X2 is applied with a second level signal (e.g., a high level signal), the 4 th output terminal G4 outputs a scan signal to the scan line 10 of the 4 th row to which it is electrically connected.
Referring to fig. 3, an alternative embodiment is provided herein, for example, the scan driving unit 100 provided in this application includes 3 input terminals X and 8 output terminals G, and in this case, the scan driving unit may be configured to control 1 output terminal G of the scan driving unit 100 to transmit the scan signal to the scan line 10 electrically connected thereto by applying the first level signal and/or the second level signal to the 3 input terminals X, respectively. The specific correspondence between the input terminal X and the output terminal G is shown in fig. 4.
Fig. 4 is illustrated, wherein the column corresponding to X1 identifies the type of the electrical signal to which X1 is applied, wherein "0" represents a first level signal, e.g., a low level signal, and "1" represents a second level signal, e.g., a high level signal; columns corresponding to X2 and X3 respectively identify the types of electrical signals applied to X2 and X3. When the electrical signal applied to the X1, X2, X3 is "000", the scan line 10 to which the corresponding output terminal G1 in the scan driving unit 100 is electrically connected transmits a scan signal; when the electrical signal applied to the X1, X2, X3 is "101", the scan line 10 to which the corresponding output terminal G6 in the scan driving unit 100 is electrically connected transmits a scan signal; the same reason for the rest is not repeated. That is, the type of the electrical signal applied to the X1, X2, X3 is used to control the transmission of the scan signal from the corresponding one of the output terminals G of the scan driving unit 100 to the scan line 10 to which it is electrically connected.
It should be added that, in the above-mentioned, for example, one scan driving unit 100, the scan driving unit 100 includes 1 input terminal X and 2 output terminals G, and it is not necessary that the scan lines 10 are driven in the order of the first row and the second row; of course, in the arrangement in which the scan driving unit 100 includes 2 input terminals X and 4 output terminals G, and the scan driving unit 100 includes 3 input terminals X and 8 output terminals G, the manner in which the scan lines 10 are driven is not limited to the manner in which the scan lines 10 are sequentially driven such as the first row, the second row, and the third row … ….
For example, when the scan driving unit 100 includes 3 input terminals X and 8 output terminals G, for example, when the 1 st input terminal X1 is applied with the second level signal (e.g., a high level signal, "1"), the 2 nd input terminal X2 is applied with the second level signal (e.g., a high level signal, "1"), the 3 rd input terminal X3 is applied with the first level signal (e.g., a low level signal, "0"), the scan line 10 electrically connected corresponding to the 7 th output terminal G7 is applied with the scan signal; that is, the user can control the type of the signal (the first level signal and/or the second level signal) applied to each input terminal X according to the requirement, thereby controlling the output terminal G to which the scan line 10 to be driven is electrically connected to transmit the scan signal.
Therefore, the scan driving unit 100 provided in the present application may transmit the scan signal for each row, may transmit the scan signal for a line skip, and may transmit the scan signal for a specific line to the scan line 10 electrically connected thereto; therefore, the flexibility of scanning signal transmission is improved, and different requirements of different application scenes of a user can be met.
It should be added that, for example, one scan driving circuit may also be selected to include 4 input terminals X and 8 output terminals G, or one scan driving circuit may also be selected to include 4 input terminals X and 16 output terminals G, etc.; that is, the number of the input terminals X and the output terminals G included in one scan driving unit 100 is not specifically limited, and a user may select the input terminals X and the output terminals G according to design requirements. In addition, the present application does not limit that all the scan driving units 100 included in one display panel are of the same specification, and scan driving units 100 of different specifications may be selected according to requirements as long as flexible driving of the scan lines 10 is achieved.
Referring to fig. 1 to fig. 4, the scan driving unit 100 is optionally a decoder.
Specifically, the present application provides a scan driving unit 100 including a smaller number of input terminals X and a larger number of output terminals G than the number of input terminals X, and therefore, the present application provides an alternative embodiment in which a decoder is selected as the scan driving unit 100.
Based on LTPS (Low Temperature Poly-Silicon) process, a logic circuit decoder can be realized on a substrate to convert a input signals into at most 2aAn output signal; each output signal is directly controlled by the input signal, and the scanning signals transmitted by the appointed scanning line 10 can be flexibly and stably controlled without depending on other output signals, so that the flexibility of scanning signal transmission is improved, and different requirements of different application scenes of a user can be met.
Wherein fig. 1 illustrates what may be referred to as a 1-2 decoder, fig. 2 illustrates what may be referred to as a 2-4 decoder, and fig. 3 illustrates what may be referred to as a 3-8 decoder.
Fig. 5 is a timing circuit diagram corresponding to fig. 4 according to an embodiment of the present invention, please refer to fig. 5 in combination with fig. 3 and fig. 4, wherein an embodiment of a scan driving unit 100 employing a 3-8 decoder is provided, the input terminal X includes a first input terminal X1, a second input terminal X2 and a third input terminal X3, such that when the input terminals X1, X2 and X3 are 000 (all low level signals), the first output terminal G1 included in the output terminal G outputs a high level (scan signal); when the input is 001 (low level signal, high level signal), the second output terminal G2 included in the output terminal G outputs high level (scanning signal), and so on, the effect of line-by-line opening of the scanning signals of G1-G8 (first output terminal G1-eighth output terminal G8) can be realized; in addition, the effect of turning on the specified row scan signals in G1-G8 can also be achieved as desired.
Furthermore, for example, for a decoder including 10 input terminals X, the transmission of 1024 rows of scanning signals can be realized, and the high level periods of the signals in each row are naturally separated and are not turned on at the same time. The output end G of each row is directly controlled by the input end X, mutual interference is avoided, the fault-tolerant rate is high, and the control mode is flexible and changeable.
Fig. 6 is a circuit configuration diagram corresponding to fig. 4 provided in an embodiment of the present application, and referring to fig. 6 in conjunction with fig. 3 to 5, a detailed configuration of a 3-8 decoder is provided here, where the 3-8 decoder can be implemented using 8 nor gates and 3 inverter circuits, and depending on a difference in input signals of the nor gates, G1 ═ X1 · X2 · X3, G3 ═ X3 · X3, G3 ═ X3 · X3, and G3 ═ X3 · X3. Taking X1 as an example, X1 is the input terminal X1 applied with a high level signal, and X1 is the input terminal X1 applied with a low level signal; the same processing is not repeated here.
For a b-c decoder requiring b signal input terminals X and c signal output terminals G, the b-c decoder may be composed of b inverters and c b input exclusive or gates, each of which is composed of b PTFTs and b NTFTs. In the LTPS process, NTFT and PTFT structures may be formed by doping control, which may be used to form logic circuits. In addition, LTPS processes can generally withstand higher voltages than ICs, allowing higher voltage circuits to be implemented. E.g., a 3-input NOR gate (NOR3), consisting of 3 NTFTs and 3 PTFTs.
Referring to fig. 3-6, alternatively, when the scan driving unit 100 includes at least 2 input terminals X;
when the scanning signal is transmitted to the scanning line 10 of the n-th row in the m-th period and the scanning signal is transmitted to the scanning line 10 of the n + 1-th row in the m + 1-th period, the first level signal applied to only one input end X is changed into the second level signal in the m-th period to the m + 1-th period, or the second level signal applied to only one input end X is changed into the first level signal in the m-th period to the m + 1-th period; m is more than 0, n is more than 0, and m and n are integers.
Specifically, for example, when the scan driving unit 100 includes 3 input terminals X, 8 output terminals G, in order to control different, specific output terminals G to transmit scan signals to the scan lines 10 to which they are electrically connected, when transmitting scan signals to different rows of scan lines 10, the types of electrical signals applied to the first input terminal X1, the second input terminal X2, and the third input terminal X3 among the 3 input terminals X are changed; for example, when the scan line 10 electrically connected to the control output terminal G3 is required to transmit a scan signal, the scan signal is required to be provided to the first input terminal X1, the second input terminal X2, and the third input terminal X3; in the next time period, if the scan line 10 electrically connected to the output terminal G7 needs to be controlled to transmit the scan signal, the scan signal needs to be provided to the first input terminal X1, the second input terminal X2, and the third input terminal X3.
That is, the above-described embodiment corresponds to two adjacent time periods, the first time period is for supplying the low-level signal to the first input terminal X1, the high-level signal to the second input terminal X2, and the low-level signal to the third input terminal X3, and the second time period is for supplying the high-level signal to the first input terminal X1, the high-level signal to the second input terminal X2, and the low-level signal to the third input terminal X3; obviously, the type of the electrical signal applied to the first input terminal X1 varies between the two adjacent time periods.
However, if the second time period is required to control the scan line 10 electrically connected to the output terminal G1 to transmit the scan signal, the second time period is required to be adjusted to provide the first input terminal X1 with the low level signal, the second input terminal X2 with the low level signal, and the third input terminal X3 with the low level signal; obviously, in the two adjacent time periods, the types of the electric signals applied to the first input terminal X1 and the second input terminal X2 are changed.
An alternative embodiment is provided herein that requires that in two adjacent time periods, only the first level signal applied to one input terminal X is jumped to the second level signal, or only the second level signal applied to one input terminal X is jumped to the first level signal. Since there is an erroneous output due to asynchronous delay when the signals applied to the two input terminals X jump simultaneously in two adjacent time periods (simultaneously jump from a low level signal to a high level signal, or simultaneously jump from a high level signal to a low level signal); the type of the electric signal applied to only one input end X is changed in two adjacent time periods, so that the condition that the scanning signal is transmitted incorrectly can be avoided, and the driving accuracy of the display panel is improved.
Fig. 7 is a diagram illustrating another corresponding relationship between a scan driving unit provided in the present embodiment and including 3 input terminals and 8 output terminals, and fig. 8 is a timing circuit diagram corresponding to fig. 7 provided in the present embodiment, please refer to fig. 3, fig. 7, and fig. 8; based on this, this application has also provided a selectable setting mode to, this application can be through changing the corresponding relation between input end X and output end G, only change an input signal level each time when realizing row by row output, avoid the wrong output. Specifically, the corresponding relationship between the adjusted input terminal X and the output terminal G of the 3-8 decoder provided in fig. 7 can be obtained; where 0 represents that a low level signal is applied and 1 represents that a high level signal is applied.
For example, when the adjustment requires the 3 rd output terminal G3 to transmit an electrical signal to the 3 rd row scan line, the electrical signal provided to the input terminals X1, X2, and X3 is "011", compared with the electrical signal provided to the previous stage input terminals X1, X2, and X3 is "001", and only the type of the electrical signal at the 2 nd input terminal X2 is adjusted; the condition that error output is caused by asynchronous delay is avoided, and the driving accuracy of the display panel is improved.
Fig. 9 is another schematic diagram illustrating a scan driving unit electrically connected to a scan line according to an embodiment of the present disclosure, fig. 10 is a diagram illustrating a corresponding relationship between an input terminal and an output terminal of fig. 9 according to the embodiment of the present disclosure, fig. 11 is a timing circuit diagram of fig. 9 according to the embodiment of the present disclosure, fig. 12 is another schematic diagram illustrating a scan driving unit electrically connected to a scan line according to the embodiment of the present disclosure, please refer to fig. 9-12, optionally, the scan driving unit 100 further includes a control signal terminal 30;
when the control signal terminal 30 is applied with the first level signal, the input terminal X is applied with the first level signal and/or the second level signal, respectively, to control one output terminal G of the scan driving unit 100 to transmit the scan signal to the scan line 10 electrically connected thereto;
when the control signal terminal 30 is applied with the second level signal, the output terminal G does not transmit the scan signal to the scan line 10 to which it is electrically connected.
Specifically, the present application further provides an alternative embodiment that, on the basis that the scan driving unit 100 includes the original input terminal X, a control signal terminal 30 is further added, and when a first level signal (e.g. a low level signal) is applied to this control signal terminal 30, the output terminal G of the scan driving unit 100 controls one of the output terminals G to transmit a scan signal to the scan line 10 electrically connected thereto according to the corresponding relationship with the input terminal X and the electrical signal (the first level signal and/or the second level signal) applied to each input terminal X; when the control signal terminal 30 is applied with the second level signal (e.g. high level signal), no matter what level signal (the first level signal and/or the second level signal) is applied to the respective input terminals X of the scan driving unit 100, each output terminal G of the scan driving unit 100 does not transmit the scan signal to the scan line 10 electrically connected thereto, that is, at this time, the corresponding relationship between the output terminal G and the input terminal X of the scan driving unit 100 fails, and the transmission of the electrical signal of 1 output terminal G to the scan line 10 electrically connected thereto cannot be realized by applying the electrical signal to the input terminal X.
Based on this, the present application also provides an alternative embodiment, for example, the scan driving unit 100 can use a 4-16 decoder (as shown in fig. 12), but only the 1 st output terminal G1 to the 8 th output terminal G8 are electrically connected to 8 scan lines 10, wherein 3 input terminals X are the first input terminal X1, the second input terminal X2 and the third input terminal X3, respectively, and the other input terminal X is used as the control signal terminal 30; that is, when the input signal of the control signal terminal 30 is at a low level, the G1-G8 can output corresponding signals according to the input electrical signals of X1-X3, and when the input signal is at a high level, no signal is output. That is, the 9 th output terminal G9 through the 16 th output terminal G16 in this 4-16 decoder are left vacant. In addition, in the present application, a 4-8 decoder (as shown in fig. 9) may be selected as the scan driving unit 100, and at this time, the situation that the output terminal G is left vacant will not occur, so that the utilization rate of the device can be improved, the waste of part of the output terminals G owned by the decoder is avoided, and the required space of part of the non-display area can be correspondingly saved.
With reference to fig. 9 to fig. 11, optionally, when the scan signal is applied to any one row of the scan lines 10, a first time period t1, a second time period t2, and a third time period t3 exist in sequence;
the durations of the first period t1 and the third period t3 are both smaller than the duration of the second period t 2;
during the first and third time periods t1 and t3, the control signal terminal 30 is applied with the second level signal.
Specifically, as shown in the 3 rd Time in fig. 11, the present application further provides an alternative embodiment, in which the Time period in which the scan signal is applied to each row of the scan lines 10 is divided into a first Time period t1, a second Time period t2, and a third Time period t3, which exist in sequence, wherein the present application sets that, by controlling the timing of the scan driving unit 100, the scan driving unit is at a low level for a short period at the beginning (the first Time period t1) and the end (the third Time period t3) of each row period, so that the scan signal output by each row is separated by a Time period before the formal turn-on and after the formal turn-off, so as to avoid the overlapping mischarging of the scan lines 10 corresponding to the previous Time period and the next Time period due to factors such as circuit delay. It is added that when all the line scans are completed, the level may be kept low for a while, so that the corresponding pixel voltage is kept.
The low level for a short period at the beginning (first time period t1) and the end (third time period t3) of each row period is achieved by applying a high level signal to the control signal terminal 30, and the control signal terminal 30 is applied with a high level signal so that each output terminal G of the scan driving unit 100 does not transmit a scan signal to the scan line 10 to which it is electrically connected.
Fig. 13 is another schematic diagram illustrating a scan driving unit electrically connected to a scan line according to an embodiment of the present disclosure, fig. 14 is a diagram illustrating a corresponding relationship between an input terminal and an output terminal of fig. 13 according to the embodiment of the present disclosure, and fig. 15 is a timing circuit diagram of fig. 13 according to the embodiment of the present disclosure, please refer to fig. 13-15, optionally, the scan driving unit 100 further includes a first voltage signal terminal Vgh;
when the first voltage signal end Vgh is applied with the first level signal, the output end G does not transmit the scanning signal to the scanning line 10 which is electrically connected with the output end G;
when the first voltage signal terminal Vgh is applied with the second level signal, the input terminals X are respectively applied with the first level signal and/or the second level signal to control one output terminal G of the scan driving unit 100 to transmit the scan signal to the scan lines 10 electrically connected thereto.
Specifically, the present application further provides an alternative arrangement manner, in which the scan driving unit 100 further includes a first voltage signal terminal Vgh in addition to the input terminal X and the output terminal G, and the first voltage signal terminal Vgh is used to control the scan driving unit 100 to be in a state where the output terminal G can transmit the scan signal to the scan line 10, or in a state where each output terminal G cannot transmit the scan signal to the scan line 10 electrically connected thereto.
Specifically, when a first level signal (e.g., a low level signal) is applied to the first voltage signal terminal Vgh, the output terminal G does not transmit a scan signal to the scan line 10 electrically connected thereto; when the first voltage signal terminal Vgh is applied with a second level signal (e.g., a high level signal), the output terminal G may control the corresponding output terminal G to transmit a scan signal to the scan line 10 to which it is electrically connected according to the electrical signal applied to each input terminal X through the corresponding relationship (as shown in fig. 14) with the input terminals X (X1, X2, X3).
As shown in the 3 rd Time in fig. 15, the period in which the scan signal is applied to each row of the scan lines 10 is divided into a first period t1, a second period t2, and a third period t3, which exist in this order; alternatively, any one row of the scanning lines 10 includes a first time period t1, a second time period t2 and a third time period t3 which exist in sequence when the scanning signal is applied;
the durations of the first period t1 and the third period t3 are both smaller than the duration of the second period t 2;
during the first and third time periods t1 and t3, the first voltage signal terminal Vgh is applied with the first level signal.
Specifically, when the first voltage signal terminal Vgh is disposed in the scan driving unit 100, the voltage of the first voltage signal terminal Vgh can be controlled by the timing sequence to be low for a short period of time at the beginning (the first time period t1) and the end (the third time period t3) of each row period, so that the scan signals output by each row are separated by a period of time before the formal turn-on and after the formal turn-off, thereby avoiding the overlapping and mis-charging of the scan lines 10 corresponding to the previous time period and the next time period caused by circuit delay and other factors. It is added that when all the line scans are completed, the level may be kept low for a while, so that the corresponding pixel voltage is kept.
It should be added that the first voltage signal terminal Vgh provided on the scan driving unit 100 and the control signal terminal 30 provided above are used for the same purpose.
In the present application, the first voltage signal terminal Vgh is set to control whether the output terminal G of the scan driving unit 100 transmits the scan signal to the scan line 10 electrically connected thereto, without increasing the number of input terminals X or leaving a part of the output terminals G of the decoder empty; therefore, the first voltage signal terminal Vgh is provided for controlling whether the scan driving unit 100 is in a state where the output terminals G can transmit the scan signals to the scan lines 10 or in a state where each output terminal G cannot transmit the scan signals to the scan lines 10 electrically connected thereto, so that occupation of a non-display area of the applied display panel can be avoided, and the applied display panel can have an effect of a narrow frame.
Fig. 16 is a schematic diagram illustrating a scan driving unit provided in the present embodiment of the application and including a first type scan driving unit and a second type scan driving unit, and fig. 17 is a timing diagram corresponding to fig. 16 provided in the present embodiment of the application, please refer to fig. 16 and fig. 17, optionally, the scan driving unit 100 includes at least 1 first type scan driving unit 101 and at least 2 second type scan driving units 102;
the second type scanning driving unit 102 further includes a first voltage signal terminal Vgh;
each output end G of the first-type scan driving unit 101 is electrically connected to a first voltage signal end Vgh of one second-type scan driving unit 102;
at least part of the output ends G of the second type scan driving unit 102 are electrically connected to the corresponding scan lines 10.
In particular, the present application also provides an alternative embodiment, in which a plurality of decoder circuits may be used,for example, 2 is generated using 1 p-way decoder circuit (first type scan drive unit 101)pThe VGH (VGH1-VGH4) signal is used as the high level signal of the subsequent decoder (second type scan driving unit 102) and is followed by 2pQ-way decoders. Thus, 2 can be generated by p + q signalsp+qA line scanning signal. Meanwhile, the number of transistors required by the decoder circuit is greatly reduced, the manufacturing cost of the scanning driving unit 100 is saved, and the non-display area in the corresponding display panel required to be occupied by the scanning circuit is reduced, so that the applied display panel can have the effect of a narrow frame.
It should be added that fig. 16 only provides an arrangement mode with 2-4 decoders as the first type scan driving unit 101 and 3-8 decoders as the second type scan driving unit 102, but the present application is not limited thereto; the 1-2 decoder, the 2-4 decoder, the 4-16 decoder, the 4-8 decoder, etc. that have been provided in the above embodiments can be used as the first type scan driving unit 101 or the second type scan driving unit 102; the decoder used by the first-type scan driving unit 101 and the second-type scan driving unit 102 is not specifically limited in this application, and a user can correspondingly adjust the selection of the decoder according to actual design requirements.
For example, when a 4-16 decoder shown in fig. 12 is used as the second scan driving unit 102, if the output terminals G9-G16 shown in fig. 12 are not electrically connected to any scan line 10, and only the output terminals G1-G8 of the second scan driving unit 102 are electrically connected to the corresponding scan lines 10, it means that only some of the output terminals G of the second scan driving unit 102 are electrically connected to the corresponding scan lines 10.
That is, if it is necessary to set the input terminal X in the second type scan driving unit 102 to include the control signal terminal 30 for controlling whether the output terminal G transmits the scan signal to the scan line 10 electrically connected thereto, the 4-16 decoder shown in fig. 12 may be selected; in addition, for example, a 4-8 decoder may also be used as the second-type scan driving unit 102, and at this time, the output end G will not be left vacant, so that the utilization rate of components can be improved, and a part of the required space of the non-display area can be correspondingly saved; the selection of the decoder type is not specifically limited in this application.
Fig. 18 is a schematic diagram illustrating a scan driving unit provided in the embodiment of the present application and including a frequency divider, fig. 19 is a schematic diagram illustrating an internal structure of the frequency divider provided in the embodiment of the present application, fig. 20 is a timing diagram illustrating an input terminal corresponding to fig. 18 provided in the embodiment of the present application, please refer to fig. 18-20, and optionally, the scan driving unit 100 further includes a frequency divider 40 and a total signal input terminal;
the scanning driving unit 100 includes K input terminals X and K-1 frequency dividers 40, the K-1 frequency dividers 40 being connected in series;
the total signal input end is electrically connected with an input end X and is electrically connected with a signal input port of the first frequency divider 40; the signal output port of each frequency divider 40 is electrically connected to one input terminal X, and is electrically connected to the signal input port of the next-stage frequency divider 40.
Specifically, after frequency divider 40 is adopted, each scan driving circuit only needs 1 input terminal X to be electrically connected with a total signal input terminal (not shown), it is not necessary that each input terminal X is equally divided and is electrically connected with a total signal input terminal, the number of total signal input terminals required to be set in the corresponding display panel non-display area is reduced, the number of connecting wires between the total signal input terminal and the input terminal X of the corresponding scan driving unit 100 is also reduced, it is beneficial to reducing the display panel non-display area space required to be occupied by the total signal input terminal and the connecting wires, and the narrow-frame effect of the display panel is ensured.
It should be noted that, after the frequency divider 40 is disposed before the input end X of the decoder, the scan driving unit 100 can implement progressive scanning in a specific sequence; and the area of the circuit unit can be greatly reduced by adopting the cascade decoding.
It should be added that on-chip divide-by-two dividers can also be implemented based on LTPS technology, as shown in fig. 19, each divider 40 can be composed of 4 two-input nand gates, so that the frequency of the output signal B is equal to half of the input signal a, and the period is 2 times. By connecting the multistage frequency dividers 40 in series, timing signals of 2T, 4T, 8T, and the like can be sequentially generated using a timing signal of one period T, and progressive signals can be generated by converting these timing signals by a decoder. Theoretically, any number of line scan signals can be realized by 1 timing signal.
Fig. 21 is a schematic diagram illustrating that the scan driving unit provided in the embodiment of the present application includes a buffer, please refer to fig. 21, and optionally, the scan driving unit 100 further includes a buffer electrically connected between the output terminal G and the scan line 10 electrically connected to the output terminal G;
the buffer comprises two inverters in series.
Specifically, 2 inverters are used to be connected in series between the output end G of the scan driving unit 100 and the scan line 10 electrically connected to the output end G, so that the output waveform of the scan driving unit can be stabilized, and the stability of the scan signal transmission is improved.
Fig. 22 is a schematic view of a display device according to an embodiment of the present application, please refer to fig. 22 in conjunction with fig. 1 to 21, and based on the same inventive concept, the present application further provides a display device 200, where the display device 200 includes:
a display panel 60 having a plurality of scanning lines 10;
a scan driving unit 100 configured to supply a scan signal to the scan lines 10.
Specifically, the display device 200 provided by the present application includes the display panel 60 and the scan driving unit 100, and the number of the scan driving units 100 provided by the present application is not particularly limited, as long as each scan line 10 included in the display panel 60 can have an output end G of the scan driving unit 100 electrically connected thereto, and can transmit a scan signal to the scan line 10 in the scanning process.
The scan driving unit 100 may select a 3-8 decoder, a 4-16 decoder, a 10-1024 decoder, etc., the type of the decoder is not specifically limited in this application, and a user may select the type of the decoder according to the number of scan lines 10 included in the display panel 60 and other designs to be referred to.
It should be noted that the display device 200 provided in the present application may be: the touch control system comprises any products and components with a touch control function, such as a mobile phone, a tablet computer, a television, a touch controller, a notebook computer, a navigator and the like.
As can be seen from the above embodiments, the scanning driving unit and the display device provided by the present invention at least achieve the following advantages:
the application provides a scanning driving unit and a display device, wherein the scanning driving unit comprises at least 1 input end and at least 2 output ends, and each output end can select 1 scanning line to be electrically connected; applying a first level signal and/or a second level signal to each input end so as to control 1 output end of the scanning driving unit to transmit scanning signals to the scanning lines electrically connected with the output end of the scanning driving unit; that is, different first level signals and/or second level signals are input to the input ends, and the transmission of scanning signals to the scanning lines corresponding to the types of the input signals of the input ends is controlled, so that the transmission of the scanning signals is not limited to a progressive scanning mode, the flexibility of the transmission of the scanning signals is improved, the requirements of different application scenes are met, the cost of realizing the scanning mode is low, and the manufacturing cost of the corresponding display device cannot be increased.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims (11)

1. A scan driving unit, comprising at least 1 input terminal, at least 2 output terminals; at least part of the output ends are respectively and electrically connected with 1 scanning line;
a first level signal and/or a second level signal are/is applied to each input end of the scanning driving unit respectively so as to control one output end of the scanning driving unit to transmit scanning signals to the scanning lines electrically connected with the output end of the scanning driving unit;
wherein the first level signal and the second level signal are a non-enable signal and an enable signal, respectively.
2. The scan driving unit of claim 1, wherein the scan driving unit is a decoder.
3. The scan drive unit of claim 1, when the scan drive unit comprises at least 2 of said input terminals;
when the scanning signal is transmitted to the scanning line of the n-th row in the m + 1-th period and the scanning signal is transmitted to the scanning line of the n + 1-th row in the m + 1-th period, the first level signal to which only one of the input terminals is applied jumps to the second level signal or the second level signal to which only one of the input terminals is applied jumps to the first level signal in the m + 1-th period; m is more than 0, n is more than 0, and m and n are integers.
4. The scan driving unit of claim 1, further comprising a control signal terminal;
when the control signal terminal is applied with the first level signal, the input terminal is respectively applied with a first level signal and/or a second level signal so as to control one output terminal of the scanning driving unit to transmit the scanning signal to the scanning line electrically connected with the output terminal;
when the control signal terminal is applied with the second level signal, the output terminal does not transmit the scanning signal to the scanning line electrically connected with the output terminal.
5. The scan drive unit of claim 4,
the scanning signal is applied to any row of the scanning lines, and the scanning lines comprise a first time period, a second time period and a third time period which exist in sequence;
the duration of the first time period and the duration of the third time period are both smaller than the duration of the second time period;
the control signal terminal is applied with a second level signal in the first period and the third period.
6. The scan driving unit of claim 1, further comprising a first voltage signal terminal;
when the first voltage signal end is applied with the first level signal, the output end does not transmit the scanning signal to the scanning line electrically connected with the output end;
when the first voltage signal terminal is applied with the second level signal, the input terminal is respectively applied with the first level signal and/or the second level signal so as to control one output terminal of the scanning driving unit to transmit the scanning signal to the scanning line electrically connected with the output terminal.
7. The scan drive unit of claim 6,
the scanning signal is applied to any row of the scanning lines, and the scanning lines comprise a first time period, a second time period and a third time period which exist in sequence;
the duration of the first time period and the duration of the third time period are both smaller than the duration of the second time period;
in the first and third periods, a first level signal is applied to the first voltage signal terminal.
8. The scan drive unit of claim 1, wherein the scan drive unit comprises at least 1 first type of scan drive unit and at least 2 second type of scan drive unit;
the second type scanning driving unit also comprises a first voltage signal end;
each output end of the first type scanning driving unit is electrically connected with the first voltage signal end of one second type scanning driving unit;
at least part of the output ends of the second type of scanning driving units are electrically connected with the corresponding scanning lines.
9. The scan drive unit of claim 1, further comprising a frequency divider and a total signal input;
the scanning driving unit comprises K input ends and K-1 frequency dividers, and the K-1 frequency dividers are connected in series;
the total signal input end is electrically connected with one input end and the signal input port of the first frequency divider; the signal output port of each frequency divider is electrically connected with one input end and the signal input port of the next-stage frequency divider.
10. The scan driving unit according to claim 1, further comprising a buffer electrically connected between the output terminal and the scan line electrically connected to the output terminal;
the buffer comprises two inverters connected in series.
11. A display device, comprising:
a display panel having a plurality of scan lines;
a scan driving unit configured to supply a scan signal to the scan lines.
CN202210210743.6A 2022-03-04 2022-03-04 Scanning drive unit and display device Pending CN114399970A (en)

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JPH095774A (en) * 1995-06-15 1997-01-10 Semiconductor Energy Lab Co Ltd Display device
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