CN114822438B - Driving circuit and display device - Google Patents
Driving circuit and display device Download PDFInfo
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- CN114822438B CN114822438B CN202210453406.XA CN202210453406A CN114822438B CN 114822438 B CN114822438 B CN 114822438B CN 202210453406 A CN202210453406 A CN 202210453406A CN 114822438 B CN114822438 B CN 114822438B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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Abstract
The application provides a driving circuit and a display device, wherein the driving circuit comprises a data storage module, a burning connection module and a time sequence control module, wherein the burning connection module and the time sequence control module are respectively and electrically connected with the data storage module, and the burning connection module is used for outputting a first control signal when the data storage module is not in a burning state. The driving circuit further comprises a first switch module electrically connected between the data storage module and the burning connection module and a second switch module electrically connected between the data storage module and the time sequence control module, wherein the first switch module is disconnected based on the first control signal, so that the electric connection between the data storage module and the burning connection module is disconnected when the burning connection module is not in a burning state. The second switch module is turned on based on the first control signal. The time sequence control module in the driving circuit provided by the application is not interfered by the data burning channel when data is read, and the reliability is high.
Description
Technical Field
The present application relates to the field of display panels, and in particular, to a driving circuit and a display device.
Background
The non-uniformity of manufacturing process or non-uniformity of material characteristics of the existing LCD display panel during the manufacturing process may cause non-uniform brightness distribution of the display panel during use, which affects the display effect, and is called a chrominance non-uniformity phenomenon (mura phenomenon).
The conventional LCD display panel improves uniformity of display brightness of a picture by means of an algorithm compensation, that is, a brightness deviation compensation (De-mura) technique. Referring to fig. 1, the step of performing De-mura on a display panel includes: 1. the compensation data is burned into the data storage module 110 in the horizontal direction circuit board (X-board, XB) connected to the display panel by the burning device 200 through the burning connection module 130 via the data burning channel (including the main SPI (Serial Peripheral Interface) bus 300 and the first branch SPI bus 400). 2. The display panel is brightness deviation compensated by reading the compensation data stored in the data storage module 110 through a data read channel (including the second branch SPI bus 500 and the main SPI bus 300) using the timing Controller 150 (Timer Controller, TCON).
However, the data storage module 110 is electrically connected to the recording connection module 130 and the timing controller 150 through the same set of pins, and the data recording channels and the data reading channels are connected to each other, so that during the De-mura process, a signal reflection phenomenon occurs between the two data transmission channels, which results in that the TCON cannot accurately read the compensation data.
Disclosure of Invention
In view of the above, the main purpose of the present application is to provide a driving circuit and a display device, which are aimed at solving the problem that the TCON cannot accurately read the compensation data due to the signal reflection phenomenon occurring between the two data transmission channels in the existing driving circuit.
In order to achieve the above object, the present application provides a driving circuit, which includes a data storage module, a recording connection module and a timing control module, wherein the recording connection module and the timing control module are respectively electrically connected with the data storage module, and the recording connection module is used for receiving target data output by a recording device and transmitting the target data to the data storage module for storage. The timing control module is used for reading the target data stored in the data storage module. The burning connection module is also used for outputting a first control signal when the burning connection module is not in a burning state. The driving circuit further comprises a first switch module and a second switch module. The first switch module is electrically connected between the data storage module and the burning connection module, and is disconnected based on the first control signal, so that the electrical connection between the data storage module and the burning connection module is disconnected when the burning connection module is not in a burning state. The second switch module is electrically connected between the data storage module and the time sequence control module, wherein the data storage module is electrically connected with the burning connection module and the time sequence control module through the same group of pins respectively. The second switch module is conducted based on the first control signal, so that the electric connection between the data storage module and the time sequence control module is conducted when the burning connection module is not in a burning state, and the time sequence control module can read the target data stored in the data storage module when the burning connection module is not in the burning state.
According to the driving circuit provided by the application, the first switch module is arranged between the data storage module and the burning connection module, and the second switch module is arranged between the data storage module and the time sequence control module, and the time sequence control module can not be interfered by the data burning channel when reading data from the data storage module by controlling the first switch module to be disconnected and controlling the second switch module to be connected when the burning connection module is not in a burning state, so that the reliability of the driving circuit can be improved.
Optionally, the recording connection module is further configured to output a second control signal when in the recording state. The first switch module is further conducted based on the second control signal, so that when the burning connection module is in a burning state, electrical connection between the data storage module and the burning connection module is conducted, and the burning connection module can transmit target data output by the burning device to the data storage module for storage. The second switch module is further disconnected based on the second control signal, so that the electrical connection between the data storage module and the time sequence control module is disconnected when the burning connection module is in a burning state.
Optionally, the writing connection module enters a writing state when receiving a writing protection signal output by the writing device, and outputs the writing protection signal to the data storage module so as to trigger the data storage module to receive and store the target data.
Optionally, the writing connection module includes a writing interface electrically connected to the writing device, where the writing interface includes a writing protection pin, and the writing interface is configured to output, when receiving a writing protection signal output by the writing device, the second control signal through the writing protection pin, and output, when not receiving the writing protection signal, the first control signal through the writing protection pin, where the second control signal is the writing protection signal.
Optionally, the same group of the data storage modules includes a first data pin, a second data pin, and a clock signal pin, and the programming interface also includes the first data pin, the second data pin, and the clock signal pin. The first switch module comprises a first switch tube, a second switch tube and a third switch tube. The first switch tube is electrically connected between the clock signal pin of the data storage module and the clock signal pin of the burning interface. The second switch tube is electrically connected between the first data pin of the data storage module and the second data pin of the burning interface. The third switch tube is electrically connected between the second data pin of the data storage module and the first data pin of the burning connection module. The first switching tube, the second switching tube and the third switching tube are all disconnected based on the first control signal, and are all connected based on the second control signal.
Optionally, the timing control module includes a first data pin, a second data pin, and a clock signal pin timing control module. The second switch module comprises a fourth switch tube, a fifth switch tube and a sixth switch tube. The fourth switching tube is electrically connected between the clock signal pin of the data storage module and the clock signal pin of the time sequence control module. The fifth switching tube is electrically connected between the first data pin of the data storage module and the second data pin of the timing control module. The sixth switching tube is electrically connected between the second data pin of the data storage module and the first data pin of the timing control module. The fourth switching tube, the fifth switching tube and the sixth switching tube are all conducted based on the first control signal, and are all disconnected based on the second control signal.
Optionally, the write protection signal is a first level signal, the writing interface outputs the first level signal as the second control signal when receiving the write protection signal, and the writing interface outputs the second level signal as the first control signal when not receiving the write protection signal. Each switching tube in the first switching module is conducted based on a first level signal, and each switching tube in the second switching module is conducted based on a second level signal.
Optionally, the write protection signal is a first level signal, the writing interface outputs the first level signal as the second control signal when receiving the write protection signal, and the writing interface outputs the second level signal as the first control signal when not receiving the write protection signal. Each switching tube in the first switching module and the second switching module is conducted based on a first level signal. The drive circuit further comprises an inverter circuit electrically connected between a write-in protection pin of the programming interface and the control end of each switching tube in the second switching module, wherein the inverter circuit is used for obtaining and outputting a third control signal after performing inversion processing on the first control signal, and obtaining and outputting a fourth control signal after performing inversion processing on the second control signal. Wherein each switching tube in the second switching module is turned on in response to the third control signal and turned off in response to the fourth control signal.
Optionally, the inverting circuit includes a seventh switching tube. The control end of the seventh switching tube is electrically connected with the write-in protection pin of the burning interface and is used for receiving the first control signal or the second control signal. The first connecting end of the seventh switching tube is electrically connected to the grounding end, and the second connecting end of the seventh switching tube is electrically connected with a voltage source through a resistor so as to receive a first level signal provided by the voltage source. Wherein, the seventh switching tube is conducted based on the first level signal. And a connection node between the second connection end of the seventh switching tube and the resistor is also electrically connected with the control end of each switching tube in the second switching module respectively. The seventh switching tube is disconnected when the first control signal is received, so that the connection node is electrically connected to the voltage source through the resistor to be at a first level, and the third control signal is output; the seventh switching tube is conducted when the second control signal is received, so that the connection node is electrically connected to the grounding end and is at a second level, and the fourth control signal is output.
The application also provides a display device which comprises a display panel and the driving circuit, wherein the driving circuit is used for driving the display panel to display based on the target data read by the timing control module and the received image data.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
Fig. 1 is a schematic diagram of a conventional driving circuit.
Fig. 2 is a schematic structural diagram of a display device according to an embodiment of the present application, where the display device includes a driving circuit.
Fig. 3 is a schematic circuit diagram of the driving circuit shown in fig. 2.
Fig. 4 is a schematic diagram of another circuit configuration of the driving circuit shown in fig. 2.
Description of main reference numerals:
display device 1000
Drive circuit 100, 100'
Horizontal direction circuit board 11
Control circuit board 15
Data storage module 110
First switch module 120
Burning connection module 130
Second switch module 140
Timing control module 150
Burning interface 131
Inverter circuit 132
Burning device 200
Main SPI bus 300
First Branch SPI bus 400
Second branch SPI bus 500
Connection node 1321
First switching tube T1
Second switching tube T2
Third switching tube T3
Fourth switching tube T4
Fifth switch tube T5
Sixth switching tube T6
Seventh switching tube T7
Resistor R1
Voltage source VDD
Write protect pin WP
First data pin SI
First data pin SI
Clock signal pin CLK
The application will be further described in the following detailed description in conjunction with the above-described figures.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without any inventive effort, are intended to be within the scope of the application.
In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 2, the present application provides a display device 1000, which includes a driving circuit 100 and a display panel, wherein the driving circuit 100 is used for driving the display panel (not shown in fig. 2) to display.
The driving circuit 100 includes a horizontal direction circuit Board 11 (X-Board, XB), a Control circuit Board 15 (Control Board, CB), and a burn-in connection module 130. The horizontal circuit board 11 is provided with a data storage module 110, and the control circuit board 15 is provided with a timing control module 150 (TCON). The burn-in connection module 130 and the timing control module 150 are electrically connected to the same set of pins of the data storage module 110. Specifically, the burn-in connection module 130 is electrically connected to the same set of pins of the data storage module 110 through a data burn-in channel (including the main SPI bus 300 and the first branch SPI bus 400). The timing controller 150 is electrically connected to the same set of pins of the data storage module 110 through a data read channel (including a main SPI bus 300, a second branch SPI bus 500). In other embodiments, the master SPI bus 300 may not be provided, that is, the burn-in connection module 130 may be electrically connected to the same set of pins of the data storage module 110 through the first branch SPI bus 400, and the timing controller 150 may be electrically connected to the same set of pins of the data storage module 110 through the second branch SPI bus 500, which is not limited herein.
In the embodiment of the present application, the recording connection module 130 is configured to receive the target data output by the recording device 200, and transmit the target data to the data storage module 110 for storage. The timing control module 150 reads the target data stored in the data storage module 110 while in a read state. The timing control module 150 is further configured to receive image data from the outside, and drive the display panel to display based on the target data and the image data. In an embodiment of the present application, the target data includes brightness deviation compensation data (demura code), and the data storage module 110 includes a Flash memory (Flash).
Since the signal reflection phenomenon exists in the data writing channel and the data reading channel in the conventional driving circuit 100, the timing control module 150 cannot accurately read the brightness deviation compensation data, thereby affecting the display effect of the display device 1000.
In order to ensure that the timing control module 150 can accurately read the compensation data, the driving circuit 100 provided by the present application is provided with the first switch module 120 and the second switch module 140 on the data writing channel and the data reading channel respectively to isolate the two data transmission channels from each other. Specifically, the first switch module 120 is electrically connected between the data storage module 110 and the burn-in connection module 130, and the second switch module 140 is electrically connected between the data storage module 110 and the timing control module 150.
In the embodiment of the present application, when the recording device 200 is operating in the data recording state, a write protection signal is output to the recording connection module 130. The writing connection module 130 enters a writing state when receiving a writing protection signal output by the writing device 200, and outputs the writing protection signal to the data storage module 110, so as to trigger the data storage module to receive and store the target data. The recording connection module 130 in the driving circuit 100 is further configured to output a first control signal when not in a recording state, and output a second control signal when in the recording state.
When the writing connection module 130 is not in the writing state, the first switch module 120 is turned off based on the first control signal, so that the electrical connection between the data storage module 110 and the writing connection module 130 is disconnected when the writing connection module 130 is not in the writing state. The second switch module 140 is turned on based on the first control signal, so that the electrical connection between the data storage module 110 and the timing control module 150 is turned on when the writing connection module 130 is not in the writing state, so that the timing control module 150 can read the target data stored in the data storage module 110 when the writing connection module 130 is not in the writing state. Thus, when the data storage module 110 reads the target data, the data burning channel can be prevented from generating interference.
When the writing connection module 130 is in the writing state, the first switch module 120 is further turned on based on the second control signal, so that the electrical connection between the data storage module 110 and the writing connection module 130 is turned on when the writing connection module 130 is in the writing state, so that the writing connection module 130 can transmit the target data output by the writing device 200 to the data storage module 110 for storage. The second switch module 140 is further turned off based on the second control signal, thereby disconnecting the electrical connection between the data storage module 110 and the timing control module 150 when the burn connection module 130 is in a burn state. Thus, when the recording connection module 130 records the target data, the data reading channel is prevented from being interfered.
Fig. 3 is a schematic circuit diagram of the driving circuit 100 in the embodiment shown in fig. 2, and the circuit structure and the working principle of the driving circuit 100 are described in detail below with reference to fig. 3.
As shown in fig. 3, the recording connection module 130 includes a recording interface 131 for electrically connecting with the recording device 200, where the recording interface 131 includes a write protection pin WP, a first data pin SI, a second data pin SO, and a clock signal pin CLK. The write protection pin WP is configured to receive the write protection signal, and the writing interface 131 is configured to output the second control signal when the write protection signal is received, and output the first control signal when the write protection signal is not received, where the second control signal is the write protection signal. The first data pin SI is a data input pin and is used for receiving data. The second data pin SO is a data output pin for outputting data. The clock signal pin CLK is used to transmit a clock signal.
In the embodiment of the present application, the same group of the data storage module 110 includes a first data pin SI, a second data pin SO and a clock signal pin CLK, the data storage module 110 further includes a write protection pin WP, and the write protection pin WP of the data storage module 110 is directly electrically connected to the write protection pin WP of the writing interface 131. In the embodiment of the present application, the data storage module 110, the recording interface 131, and the timing control module 150 further include chip select pins CS, and the chip select pins CS of the data storage module 110 are respectively and directly electrically connected to the chip select pins CS of the recording interface 131 and the chip select pins CS of the timing control module 150. In the embodiment of the application, direct electrical connection means that no switching tube is arranged between corresponding pins of the two modules.
In the embodiment of the present application, the first switching module 120 includes a first switching tube T1, a second switching tube T2, and a third switching tube T3. The first switch tube T1 is electrically connected between the clock signal pin CLK of the data storage module 110 and the clock signal pin CLK of the writing interface 131. The second switch tube T2 is electrically connected between the first data pin SI of the data storage module 110 and the second data pin SO of the writing interface 131. The third switch T3 is electrically connected between the second data pin SO of the data storage module 110 and the first data pin SI of the burn-in connection module 130. The first switching tube T1, the second switching tube T2, and the third switching tube T3 are all disconnected based on the first control signal, so as to disconnect the electrical connection between each communication pin of the data storage module 110 and the burning interface 131. The first switching tube T1, the second switching tube T2, and the third switching tube T3 are further turned on based on the second control signal, so as to turn on the electrical connection between each communication pin of the data storage module 110 and the burning interface 131.
In the embodiment of the present application, the second switching module 140 includes a fourth switching tube T4, a fifth switching tube T5, and a sixth switching tube T6. The fourth switching tube T4 is electrically connected between the clock signal pin CLK of the data storage module 110 and the clock signal pin CLK of the timing control module 150. The fifth switching tube T5 is electrically connected between the first data pin SI of the data storage module 110 and the second data pin SO of the timing control module 150. The sixth switching tube T6 is electrically connected between the second data pin SO of the data storage module 110 and the first data pin SI of the timing control module 150. The fourth switching tube T4, the fifth switching tube T5, and the sixth switching tube T6 are all turned on based on the first control signal, so that the electrical connection between each communication pin of the data storage module 110 and the timing control module 150 is turned on. The fourth switching tube T4, the fifth switching tube T5 and the sixth switching tube T6 are also turned off based on the second control signal, so that the electrical connection between each communication pin of the data storage module 110 and the timing control module 150 is disconnected.
Further, the write protection pin WP of the writing interface 131 is electrically connected to the ground (not shown in fig. 3) through a resistor, and the write protection signal is a first level signal. The writing interface 131 outputs a first level signal as the second control signal when the write protection pin WP receives the write protection signal, and the writing interface 131 is electrically connected to the ground terminal through a resistor to be at a second level when the write protection pin WP does not receive the write protection signal, thereby outputting a second level signal as the first control signal. Each of the switching transistors in the first switching module 120 and the second switching module 140 is turned on based on a first level signal. Illustratively, the first level is a high level, the second level is a low level, and each of the switching transistors in the first switching module 120 and the second switching module 140 is an NMOS transistor.
The programming connection module 130 further includes an inverter circuit 132 electrically connected between the write protection pin of the programming interface 131 and the control end of each switching tube in the second switching module 140, where the inverter circuit 132 is configured to perform an inversion process on the first control signal to obtain and output a third control signal, and is configured to perform an inversion process on the second control signal to obtain and output a fourth control signal. Wherein each switching tube in the second switching module 140 is turned on in response to the third control signal, so as to turn on the electrical connection between each communication pin of the data storage module 110 and the timing control module 150. Each of the switching transistors in the second switching module 140 is also opened in response to the fourth control signal, thereby disconnecting the electrical connection between each of the communication pins of the data storage module 110 and the timing control module 150. Of course, in other embodiments, the inverter circuit 132 may be disposed in any one of the first switch module 120, the second switch module 140, and the timing control module 150, which is not limited herein.
Specifically, the inverter circuit 132 includes a seventh switching transistor T7 and a resistor R1. The control end of the seventh switching tube T7 is electrically connected to the write protection pin WP of the writing interface 131, and is configured to receive the first control signal or the second control signal. The first connection end of the seventh switching tube T7 is electrically connected to the ground end, and the second connection end of the seventh switching tube T7 is electrically connected to a voltage source VDD through a resistor R1, so as to receive a first level signal provided by the voltage source. Wherein, the seventh switching tube T7 is conducted based on the first level signal.
The connection node 1321 between the second connection end of the seventh switching tube T7 and the resistor R1 is further electrically connected to the control end of each switching tube in the second switching module 140.
In operation, the writing interface 131 outputs a first level signal as the second control signal when the write protection pin WP receives the write protection signal output by the writing device 200. Each of the switching transistors in the first switching module 120 is turned on in response to the second control signal. The seventh switching tube T7 receives the second control signal to be turned on, so that the connection node 1321 is electrically connected to the ground terminal through the turned-on seventh switching tube T7 to be at a second level, and outputs the fourth control signal, thereby turning off each switching tube in the second switching module 140. At this stage, the recording device 200 can record the target data for the data storage module 110 through the turned-on first switch module 120, and is not interfered by the data reading channel.
The writing interface 131 outputs a second level signal as the first control signal when the write protection pin WP thereof does not receive the write protection signal output by the writing device 200. Each switching tube in the first switching module 120 is opened in response to the first control signal. The seventh switching tube T7 receives the first control signal to be turned off, so that the connection node 1321 is electrically connected to the voltage source VDD through the resistor R1 to be at a first level, and outputs the third control signal, thereby turning on each switching tube in the second switching module 140. At this stage, the timing control module 150 can read the target data stored in the data storage module 110 through the turned-on second switching module 140, and is not interfered by the data burning channel.
Referring to fig. 4, fig. 4 is a schematic diagram of another circuit structure of the driving circuit 100 in the embodiment shown in fig. 2. The driving circuit 100' shown in fig. 4 is similar to the driving circuit 100 shown in fig. 3 in circuit configuration, except that: in the driving circuit 100' shown in fig. 4, each of the switching tubes in the second switch module 140 is turned on based on the second level signal, and the control end of each of the switching tubes in the second switch module 140 is electrically connected to the protection pin WP of the writing interface 131. Thus, the inverter circuit 132 does not need to be provided, and the circuit configuration can be simplified. Illustratively, each of the switching transistors in the first switching module 120 is an NMOS transistor, and each of the switching transistors in the second switching module 140 is a PMOS transistor.
When the write protection pin WP of the write interface 131 receives the write protection signal output by the writing device 200, the write interface outputs a first level signal as the second control signal, each switch tube in the first switch module 120 is turned on in response to the second control signal, and each switch tube in the second switch module 140 is turned off in response to the second control signal.
When the write protection pin WP of the write interface 131 does not receive the write protection signal output by the writing device 200, a second level signal is output as the first control signal, each switching tube in the first switching module 120 is turned off in response to the first control signal, and each switching tube in the second switching module 140 is turned on in response to the second control signal.
In the driving circuit 100 provided by the application, the first switch module 120 is arranged between the data storage module 110 and the programming connection module 130, and the second switch module 140 is arranged between the data storage module 110 and the timing control module 150, and the timing control module 150 is not interfered by the data programming channel when reading data from the data storage module 110 by controlling the first switch module 120 to be disconnected and controlling the second switch module 140 to be connected when the programming connection module 130 is not in the programming state. In addition, by controlling the first switch module 120 to be turned on and controlling the second switch module 140 to be turned off when the writing connection module 130 is in the writing state, the writing device 200 can not be interfered by the data reading channel when writing data to the data storage module 110, so that the reliability of the driving circuit 100 can be improved, and the display effect of the display device 1000 can be improved.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the application, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. The driving circuit comprises a data storage module, a burning connection module and a time sequence control module, wherein the burning connection module and the time sequence control module are respectively and electrically connected with the data storage module, and the burning connection module is used for receiving target data output by a burning device and transmitting the target data to the data storage module for storage; the time sequence control module is used for reading the target data stored in the data storage module; it is characterized in that the method comprises the steps of,
the burning connection module is also used for outputting a first control signal when the burning connection module is not in a burning state;
the driving circuit further includes:
the first switch module is electrically connected between the data storage module and the burning connection module; and
the second switch module is electrically connected between the data storage module and the time sequence control module;
the data storage module is electrically connected with the burning connection module and the time sequence control module through the same group of pins respectively;
the first switch module is disconnected based on the first control signal, so that the electric connection between the data storage module and the burning connection module is disconnected when the burning connection module is not in a burning state;
the second switch module is conducted based on the first control signal, so that the electrical connection between the data storage module and the time sequence control module is conducted when the burning connection module is not in a burning state, and the time sequence control module can read the target data stored in the data storage module when the burning connection module is not in the burning state;
the writing connection module enters a writing state when receiving a writing protection signal output by the writing device, and outputs the writing protection signal to the data storage module so as to trigger the data storage module to receive and store the target data;
the programming connection module comprises a programming interface used for being electrically connected with the programming device, the programming interface comprises a writing protection pin, and the programming interface is used for outputting the first control signal through the writing protection pin when the writing protection signal is not received;
the write-in protection signal is a first level signal, and the burning interface outputs a second level signal as the first control signal when the write-in protection signal is not received;
the first switch module and the second switch module comprise three switch tubes, and each switch tube in the first switch module and the second switch module is conducted based on a first level signal;
the drive circuit further comprises an inverter circuit electrically connected between a write-in protection pin of the programming interface and the control end of each switching tube in the second switching module;
the inverting circuit is used for obtaining and outputting a third control signal after performing inverting processing on the first control signal, wherein each switching tube in the second switching module is conducted in response to the third control signal;
the inverting circuit comprises a seventh switching tube, and the control end of the seventh switching tube is electrically connected with a write-in protection pin of the burning interface and is used for receiving the first control signal; the first connecting end of the seventh switching tube is electrically connected with the grounding end, and the second connecting end of the seventh switching tube is electrically connected with a voltage source through a resistor so as to receive a first level signal provided by the voltage source; wherein the seventh switching tube is conducted based on a first level signal;
the connection node between the second connection end of the seventh switching tube and the resistor is also electrically connected with the control end of each switching tube in the second switching module respectively;
the seventh switching tube is disconnected when the first control signal is received, so that the connection node is electrically connected to the voltage source through the resistor to be at a first level, and outputs the third control signal.
2. The drive circuit of claim 1, wherein the programming connection module is further configured to output a second control signal when in the programming state;
the first switch module is further conducted based on the second control signal, so that the electric connection between the data storage module and the burning connection module is conducted when the burning connection module is in a burning state, and the burning connection module can transmit target data output by the burning device to the data storage module for storage;
the second switch module is further disconnected based on the second control signal, so that the electrical connection between the data storage module and the time sequence control module is disconnected when the burning connection module is in a burning state.
3. The drive circuit of claim 2, wherein the programming interface is further configured to output the second control signal via the write protect pin when receiving a write protect signal output by the programming device, wherein the second control signal is the write protect signal.
4. The drive circuit of claim 3, wherein the same set of pins of the data storage module includes a first data pin, a second data pin, and a clock signal pin, the burn interface also including the first data pin, the second data pin, and the clock signal pin;
the first switch module includes:
the first switch tube is electrically connected between the clock signal pin of the data storage module and the clock signal pin of the burning interface;
the second switch tube is electrically connected between the first data pin of the data storage module and the second data pin of the burning interface; and
the third switch tube is electrically connected between the second data pin of the data storage module and the first data pin of the burning connection module;
the first switching tube, the second switching tube and the third switching tube are all disconnected based on the first control signal, and are all connected based on the second control signal.
5. The drive circuit of claim 4, wherein the timing control module comprises a first data pin, a second data pin, and a clock signal pin timing control module;
the second switch module includes:
the fourth switching tube is electrically connected between the clock signal pin of the data storage module and the clock signal pin of the time sequence control module;
a fifth switching tube electrically connected between the first data pin of the data storage module and the second data pin of the timing control module; and
a sixth switching tube electrically connected between the second data pin of the data storage module and the first data pin of the timing control module;
the fourth switching tube, the fifth switching tube and the sixth switching tube are all conducted based on the first control signal, and are all disconnected based on the second control signal.
6. The driving circuit as claimed in claim 5, wherein said programming interface outputs a first level signal as said second control signal when said write protect signal is received, said inverting circuit further adapted to invert said second control signal to obtain and output a fourth control signal; wherein each switching tube in the second switching module is opened in response to the fourth control signal.
7. The drive circuit of claim 6, wherein the control terminal of the seventh switching tube is further configured to receive the second control signal; the seventh switching tube is conducted when the second control signal is received, so that the connection node is electrically connected to the grounding end and is at a second level, and the fourth control signal is output.
8. A display device, comprising:
a display panel;
the driving circuit according to any one of claims 1 to 7, wherein the driving circuit is configured to drive the display panel to display based on the target data read by the timing control module and the received image data.
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| CN114822438A (en) | 2022-07-29 |
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