WO2020093587A1 - Dispositif de déconnexion de bus en série et panneau d'affichage à cristaux liquides - Google Patents

Dispositif de déconnexion de bus en série et panneau d'affichage à cristaux liquides Download PDF

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Publication number
WO2020093587A1
WO2020093587A1 PCT/CN2019/070741 CN2019070741W WO2020093587A1 WO 2020093587 A1 WO2020093587 A1 WO 2020093587A1 CN 2019070741 W CN2019070741 W CN 2019070741W WO 2020093587 A1 WO2020093587 A1 WO 2020093587A1
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WO
WIPO (PCT)
Prior art keywords
transistor
terminal
switch module
write operation
isolation switch
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PCT/CN2019/070741
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English (en)
Chinese (zh)
Inventor
张先明
曹丹
李文芳
Original Assignee
深圳市华星光电技术有限公司
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Application filed by 深圳市华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Publication of WO2020093587A1 publication Critical patent/WO2020093587A1/fr

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Classifications

    • 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

Definitions

  • the invention relates to the field of display technology, in particular to a serial bus isolation device and a liquid crystal display panel.
  • PMIC Power management IC
  • PMIC Power management IC
  • TFT gate high-voltage VGH, low-voltage VHL, source voltage VDD, reference voltage VCOM, etc. various voltages (such as TFT gate high-voltage VGH, low-voltage VHL, source voltage VDD, reference voltage VCOM, etc.) for powering the display circuit and backlight in the display panel.
  • NVM non-volatile memory
  • the code is stored in the flash memory through the timing control circuit (Time Control, TCON for short) read the code in the flash memory and write it to the PMIC register.
  • TCON will monitor during the blanking time of each frame, so it will always occupy the I2C bus.
  • the electrically erasable programmable read-only memory (SOC) of the TV drive system (SOC) Programmable Read-Only Memory (EEPROM for short) and tuner (Tunner) will also use the I2C bus.
  • the liquid crystal display panel machine factory will adjust the voltage flicker, and the reference voltage (VCOM) needs to be adjusted. Therefore, the I2C bus of the TV drive system and the I2C bus of the control board (CB) need to be connected together ; But when the TV drive system performs a search or other actions, the tuner's I2C bus will also act, at this time the TV drive system and the I2C bus of the control board will conflict, resulting in an unsuccessful TV drive system search and TCON Abnormal movement.
  • the object of the present invention is to provide a serial bus isolation device and a liquid crystal display panel, which can isolate the I2C bus of the TV drive system and the control board to prevent the conflict between the TV drive system and the I2C bus of the control board.
  • the present invention provides a serial bus isolation device, which includes a first isolation switch module and a second isolation switch module; the first isolation switch module is used to receive a write operation control signal and a television drive system, respectively Serial data signal and serial data signal of the control board, the first isolation switch module includes a first transistor and a second transistor, the first terminal of the first transistor is coupled to an external write operation control signal input terminal , Its second terminal is grounded, and its control terminal is used to receive the serial data signal of the TV driving system, and the first terminal of the second transistor is used to receive the serial data signal of the control board.
  • the two terminals are grounded, and the control terminal is coupled to the write operation control signal input terminal;
  • the second isolation switch module is used to receive the write operation control signal and the serial clock signal of the television driving system and Serial clock signal of the control board,
  • the second isolation switch module includes a third transistor and a fourth transistor, a first end of the third transistor is coupled to the write As a control signal input terminal, the second terminal is grounded, and the control terminal is used to receive the serial clock signal of the control board, and the first terminal of the fourth transistor is used to receive the serial of the television driving system
  • the second end of the clock signal is grounded, and the control end thereof is coupled to the input terminal of the write operation control signal; when the write operation control signal is at the first level, the first isolation switch module and the second The isolation switch module works in the first mode to control the serial bus of the TV drive system and the serial bus of the control board to be isolated from each other; when the write operation control signal is at the second level, the first The isolation switch module and the second isolation switch module work in the second mode to control the
  • the serial clock signal is consistent with the level of the serial clock signal of the television driving system, so that the television driving system adjusts the reference voltage; wherein, the first transistor and the second The body tube, the third transistor, and the fourth transistor are all PMOS tubes, the drain of the PMOS tube is used as the first terminal, the source of the PMOS tube is used as the second terminal, and the gate of the PMOS tube is used as the control terminal.
  • the first level and the second level are the same potential and opposite electrical levels.
  • the present invention also provides a serial bus isolation device, which includes a first isolation switch module and a second isolation switch module; the first isolation switch module is used to receive a write operation control signal and a TV drive, respectively The serial data signal of the system and the serial data signal of the control board; the second isolation switch module is used to receive the write operation control signal, the serial clock signal of the television drive system and the control board respectively Serial clock signal; when the write operation control signal is at a first level, the first isolation switch module and the second isolation switch module work in a first mode to control the serial of the television drive system The bus and the serial bus of the control board are isolated from each other; when the write operation control signal is at the second level, the first isolation switch module and the second isolation switch module work in a second mode to control the The serial data signal of the control board and the serial data signal of the television drive system have the same level, and the serial clock signal of the control board and the television The level of the serial clock signal of the dynamic system is the same, so that the television drive system adjusts the reference voltage;
  • the present invention also provides a liquid crystal display panel, the liquid crystal display panel includes a serial bus isolation device, the serial bus isolation device includes a first isolation switch module and a second isolation switch module;
  • the first isolation switch module is used to receive the write operation control signal, the serial data signal of the TV drive system and the serial data signal of the control board respectively;
  • the second isolation switch module is used to receive the write operation control signal, A serial clock signal of the television driving system and a serial clock signal of the control board; when the write operation control signal is at a first level, the first isolation switch module and the second isolation switch module Work in the first mode to control the serial bus of the TV drive system and the serial bus of the control board to be isolated from each other; when the write operation control signal is at a second level, the first isolation switch module Work with the second isolation switch module in a second mode to control the serial data signal of the control board and the serial number of the television drive system
  • the level of the signal is consistent, the serial clock signal of the control board and the serial clock signal of the television drive system are consistent, so
  • the invention sets the isolation switch module, when the reference voltage needs to be adjusted to adjust the voltage flicker, the I2C bus of the TV drive system and the I2C bus of the control board are connected together, and the I2C bus of the control board does not operate, the host system only accepts the TV The operation of the I2C bus of the machine drive system.
  • the I2C bus of the TV drive system communicates with the I2C bus of the control board.
  • the serial data signal SDA_C of the control board and the serial data signal SDA_S of the TV drive system have the same level and control.
  • the serial clock signal SCL_C of the board is consistent with the serial clock signal SCL_S of the TV drive system, so that the TV drive system can adjust the reference voltage to adjust the voltage flicker;
  • the I2C bus of the TV drive system and the I2C bus of the control board are isolated from each other, that is, the I2C bus of the TV drive system and the I2C bus of the control board work independently and do not affect each other.
  • the I2C bus of the machine drive system conflicts with the I2C bus of the control board.
  • FIG. 1 the architecture of an embodiment of the serial bus isolation device of the present invention
  • FIG. 2 is a circuit diagram of an embodiment of the serial bus isolation device of the present invention.
  • the first feature “above” or “below” the second feature may include the direct contact of the first and second features, or may include the first and second features Contact not directly but through another feature between them.
  • the first feature is “above”, “above” and “above” the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
  • the first feature is “below”, “below” and “below” the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the first feature is less horizontal than the second feature.
  • the serial bus isolation device 10 includes a first isolation switch module 11 and a second isolation switch module 12.
  • the first isolation switch module 11 is electrically connected to an external write operation control signal input terminal 19 for receiving a write operation control signal WP, and the first isolation switch module 11 is also used to receive serial data of a TV driving system respectively The signal SDA_S and the serial data signal SDA_C of the control board.
  • the second isolation switch module 12 is electrically connected to an external write operation control signal input terminal 19 for receiving a write operation control signal WP, and the second isolation switch module 12 is also used to receive a serial clock of a TV driving system respectively The signal SCL_S and the serial clock signal SCL_C of the control board.
  • the first isolation switch module 11 and the second isolation switch module 12 work in the first mode to control the serial bus of the television driving system ( I2C bus) and the serial bus (I2C bus) of the control board are isolated from each other; when the write operation control signal WP is at a second level, the first isolation switch module 11 and the second isolation switch module 12 Work in the second mode to control the serial data signal SDA_C of the control board and the serial data signal SDA_S of the TV drive system to have the same level, the serial clock signal SCL_C of the control board and the TV
  • the level of the serial clock signal SCL_S of the machine drive system is the same, so that the TV drive system adjusts the reference voltage (VCOM); wherein, the first level and the second level are the same potential, Electrically opposite level. For example, the first level is a low level, and the second level is a high level.
  • the isolation switch module when the reference voltage needs to be adjusted to adjust the voltage flicker, the I2C bus of the TV drive system and the I2C bus of the control board are connected together, and the I2C bus of the control board does not operate, the host system only accepts The operation of the I2C bus of the TV drive system, the I2C bus of the TV drive system communicates with the I2C bus of the control board, the serial data signal SDA_C of the control board and the serial data signal SDA_S of the TV drive system have the same level,
  • the serial clock signal SCL_C of the control board is consistent with the serial clock signal SCL_S of the TV drive system, so that the TV drive system can adjust the reference voltage to adjust the voltage flicker;
  • the I2C bus of the TV drive system and the I2C bus of the control board are isolated from each other, that is, the I2C bus of the TV drive system and the I2C bus of the control board work independently without affecting each other, so avoiding The I2C bus of
  • the serial bus isolation device 10 includes a first isolation switch module 11 and a second isolation switch module 12.
  • the first isolation switch module 11 includes a first transistor M1 and a second transistor M2.
  • the first transistor M1 the first terminal is coupled to an external write operation control signal input terminal 19 for receiving the write operation control signal WP, the second terminal is grounded (GND), and the control terminal is used for receiving serial data of the TV driving system Signal SDA_S.
  • the first transistor M1 is a PMOS tube, and the drain of M1 is coupled as the first end to the write operation control signal input terminal 19 for receiving the write operation control signal WP, and the source of M1 as the second end is grounded, M1
  • the grid serves as the control terminal for receiving the serial data signal SDA_S of the TV driving system.
  • the second transistor M2 the first terminal is used to receive the serial data signal SDA_C of the control board, the second terminal is grounded, and the control terminal is coupled to the write operation control signal input terminal 19 for receiving the write operation control signal WP.
  • the second transistor M2 is a PMOS tube, the drain of M2 is used as the first terminal to receive the serial data signal SDA_C of the control board, the source of M2 is grounded as the second terminal, and the gate of M2 is coupled as the control terminal
  • the write operation control signal input terminal 19 is used to receive the write operation control signal WP.
  • the second isolation switch module 12 includes a third transistor M3 and a fourth transistor M4.
  • the third transistor M3 has a first terminal coupled to the write operation control signal input terminal 19 for receiving the write operation control signal WP, a second terminal grounded, and a control terminal for receiving the serial clock signal SCL_C of the control board.
  • the third transistor M3 is a PMOS tube, and the drain of M3 is coupled as the first end to the write operation control signal input terminal 19 for receiving the write operation control signal WP, the source of M3 as the second end grounded, and M3
  • the gate serves as a control terminal for receiving the serial clock signal SCL_C of the control board.
  • the fourth transistor M4 the first terminal is used to receive the serial clock signal SCL_S of the TV driving system, the second terminal is grounded, and the control terminal is coupled to the write operation control signal input terminal 19 for receiving the write operation control signal WP.
  • the fourth transistor M4 is a PMOS tube, the drain of M4 is used as the first terminal for receiving the serial clock signal SCL_S of the TV driving system, the source of M4 is grounded as the second terminal, and the gate of M4 is used as the control terminal
  • the input terminal 19 is coupled to the write operation control signal for receiving the write operation control signal WP.
  • the first isolation switch module 11 and the second isolation switch module 12 work in the first mode, and the second transistor M2 and the fourth transistor M4 are turned off To control the I2C bus of the TV drive system and the I2C bus of the control board to be isolated from each other. That is, at this time, the I2C bus of the TV drive system and the I2C bus of the control board work independently without affecting each other, thus avoiding conflicts between the I2C bus of the TV drive system and the I2C bus of the control board.
  • the first isolation switch module 11 and the second isolation switch module 12 operate in the second mode, and the first transistor M1 and the second transistor M2 are based on The serial data signal SDA_S of the TV drive system is turned on / off, and the serial data signal SDA_C of the control board is consistent with the serial data signal SDA_S of the TV drive system; the third transistor M3 and the fourth transistor M4 are based on The serial clock signal SCL_S of the TV drive system is turned on / off, and the level of the serial clock signal SCL_C of the control board and the serial clock signal SCL_S of the TV drive system are the same, so that the TV drive system performs the reference voltage Adjustment.
  • the write operation control signal WP is at a high level, the I2C bus of the control board does not operate, and the host system only accepts the action of the I2C bus of the TV drive system.
  • the working principle of the serial data signal SDA is: when the serial data signal SDA_S of the TV drive system is high, the first transistor M1 is turned on, the data signal node SDA_1 is low, the second transistor M2 is turned off, the control board
  • the serial data signal SDA_C is high level, consistent with SDA_S; when the serial data signal SDA_S of the TV driving system is low level, the first transistor M1 is turned off, the data signal node SDA_1 is high level, and the second transistor M2 is turned on ,
  • the serial data signal SDA_C of the control board is low, which is also consistent with SDA_S.
  • the working principle of the serial clock signal SCL is consistent with the working principle of the serial data signal SDA: when the serial clock signal SCL_S of the TV driving system is high, the third transistor M3 is turned on, and the clock signal node SCL_1 is low, The fourth transistor M4 is turned off, the serial clock signal SCL_C of the control board is high, which is consistent with SCL_S; when the serial clock signal SCL_S of the TV drive system is low, the third transistor M3 is turned off, and the clock signal node SCL_1 is high Level, the fourth transistor M4 is turned on, and the serial clock signal SCL_C of the control board is low, which is also consistent with SCL_S.
  • the I2C bus of the TV drive system can communicate with the I2C bus of the control board, so that the TV drive system adjusts the reference voltage, thereby adjusting the voltage flicker.
  • the first isolation switch module 11 further includes a first resistor R1, the first terminal of the first transistor M1 and the control terminal of the second transistor M2 are electrically connected to the write operation control signal input terminal 19 through the first resistor R1;
  • the two isolation switch module 12 further includes a second resistor R2. Both the first terminal of the third transistor M3 and the control terminal of the fourth transistor M4 are electrically connected to the write operation control signal input terminal 19 through the second resistor R2.
  • the high-level write operation control signal at the write operation control signal input terminal 19, or the high-level signal at the first end of the first transistor M1 flows through the first resistor R1 to generate a voltage drop, thereby realizing voltage division and current limiting.
  • the high-level write operation control signal at the write operation control signal input terminal 19, or the high-level signal at the first end of the third transistor M3, flows through the second resistor R2 to generate a voltage drop to achieve voltage division and current limiting .
  • the serial bus isolation device 10 includes a first isolation switch module 11 and a second isolation switch module 12.
  • the first isolation switch module 11 is electrically connected to an external write operation control signal input terminal 19 for receiving a write operation control signal WP, and the first isolation switch module 11 is also used to receive serial data of a TV driving system respectively The signal SDA_S and the serial data signal SDA_C serial clock signal SCL_S of the control board.
  • the second isolation switch module 12 is electrically connected to an external write operation control signal input terminal 19 for receiving a write operation control signal WP, and the second isolation switch module 12 is also used to receive a serial clock of a TV driving system respectively The signal SCL_S and the serial clock signal SCL_C of the control board.
  • the first isolation switch module and the second isolation switch module work in a first mode to control the serial bus (I2C) of the television driving system Isolated from the serial bus (I2C) of the control board; when the write control signal WP is at the second level, the first isolation switch module and the second isolation switch module work in a second mode,
  • the serial clock signal SCL_C of the control board and the serial of the television drive system The level of the clock signal SCL_S is the same, so that the TV driving system adjusts the reference voltage (VCOM); wherein, the first level and the second level are the same potential and opposite electrical levels .
  • the first level is a low level
  • the second level is a high level.
  • the isolation switch module By setting the isolation switch module, when the reference voltage needs to be adjusted to adjust the voltage flicker, the I2C bus of the TV drive system and the I2C bus of the control board are connected together, and the I2C bus of the control board does not operate, and the system only accepts the TV. The operation of the I2C bus of the machine drive system.
  • the I2C bus of the TV drive system communicates with the I2C bus of the control board.
  • the serial data signal SDA_C of the control board and the serial data signal SDA_S of the TV drive system have the same level and control
  • the serial clock signal SCL_C of the board is consistent with the serial clock signal SCL_S of the TV drive system, so that the TV drive system can adjust the reference voltage to adjust the voltage flicker;
  • the I2C bus of the TV drive system and the I2C bus of the control board are isolated from each other, that is, the I2C bus of the TV drive system and the I2C bus of the control board work independently without affecting each other, so the TV is avoided
  • the I2C bus of the machine drive system conflicts with the I2C bus of the control board.
  • the first isolation switch module 11 of the serial bus isolation device 10 includes a first transistor M1 and a second transistor M2; the second isolation switch module 12 includes a third transistor M3 and a fourth transistor M4, as shown in picture 2.
  • the first transistor M1 the first terminal is coupled to an external write operation control signal input terminal 19 for receiving the write operation control signal WP, the second terminal is grounded (GND), and the control terminal is used for receiving serial data of the TV driving system Signal SDA_S.
  • the first transistor M1 is a PMOS tube, and the drain of M1 is coupled as the first end to the write operation control signal input terminal 19 for receiving the write operation control signal WP, and the source of M1 as the second end is grounded, M1
  • the grid serves as the control terminal for receiving the serial data signal SDA_S of the TV driving system.
  • the second transistor M2 the first terminal is used to receive the serial data signal SDA_C of the control board, the second terminal is grounded, and the control terminal is coupled to the write operation control signal input terminal 19 for receiving the write operation control signal WP.
  • the second transistor M2 is a PMOS tube, the drain of M2 is used as the first terminal to receive the serial data signal SDA_C of the control board, the source of M2 is grounded as the second terminal, and the gate of M2 is coupled as the control terminal
  • the write operation control signal input terminal 19 is used to receive the write operation control signal WP.
  • the third transistor M3 has a first terminal coupled to the write operation control signal input terminal 19 for receiving the write operation control signal WP, a second terminal grounded, and a control terminal for receiving the serial clock signal SCL_C of the control board.
  • the third transistor M3 is a PMOS tube, and the drain of M3 is coupled as the first end to the write operation control signal input terminal 19 for receiving the write operation control signal WP, the source of M3 as the second end grounded, and M3
  • the gate serves as a control terminal for receiving the serial clock signal SCL_C of the control board.
  • the fourth transistor M4 the first terminal is used to receive the serial clock signal SCL_S of the TV driving system, the second terminal is grounded, and the control terminal is coupled to the write operation control signal input terminal 19 for receiving the write operation control signal WP.
  • the fourth transistor M4 is a PMOS tube, the drain of M4 is used as the first terminal for receiving the serial clock signal SCL_S of the TV driving system, the source of M4 is grounded as the second terminal, and the gate of M4 is used as the control terminal
  • the input terminal 19 is coupled to the write operation control signal for receiving the write operation control signal WP.
  • the first isolation switch module 11 and the second isolation switch module 12 work in the first mode, and the second transistor M2 and the fourth transistor M4 are turned off To control the I2C bus of the TV drive system and the I2C bus of the control board to be isolated from each other. That is, at this time, the I2C bus of the TV drive system and the I2C bus of the control board work independently without affecting each other, thus avoiding conflicts between the I2C bus of the TV drive system and the I2C bus of the control board.
  • the first isolation switch module 11 and the second isolation switch module 12 operate in the second mode, and the first transistor M1 and the second transistor M2 are based on The serial data signal SDA_S of the TV drive system is turned on / off, and the serial data signal SDA_C of the control board is consistent with the serial data signal SDA_S of the TV drive system; the third transistor M3 and the fourth transistor M4 are based on The serial clock signal SCL_S of the TV drive system is turned on / off, and the level of the serial clock signal SCL_C of the control board and the serial clock signal SCL_S of the TV drive system are the same, so that the TV drive system performs the reference voltage Adjustment.
  • the write operation control signal WP is at a high level, the I2C bus of the control board does not operate, and the host system only accepts the action of the I2C bus of the TV drive system.
  • the working principle of the serial data signal SDA is: when the serial data signal SDA_S of the TV drive system is high, the first transistor M1 is turned on, the data signal node SDA_1 is low, the second transistor M2 is turned off, the control board
  • the serial data signal SDA_C is high level, consistent with SDA_S; when the serial data signal SDA_S of the TV driving system is low level, the first transistor M1 is turned off, the data signal node SDA_1 is high level, and the second transistor M2 is turned on ,
  • the serial data signal SDA_C of the control board is low, which is also consistent with SDA_S.
  • the working principle of the serial clock signal SCL is consistent with the working principle of the serial data signal SDA: when the serial clock signal SCL_S of the TV driving system is high, the third transistor M3 is turned on, and the clock signal node SCL_1 is low, The fourth transistor M4 is turned off, the serial clock signal SCL_C of the control board is high, which is consistent with SCL_S; when the serial clock signal SCL_S of the TV drive system is low, the third transistor M3 is turned off, and the clock signal node SCL_1 is high Level, the fourth transistor M4 is turned on, and the serial clock signal SCL_C of the control board is low, which is also consistent with SCL_S.
  • the I2C bus of the TV drive system can communicate with the I2C bus of the control board, so that the TV drive system adjusts the reference voltage, thereby adjusting the voltage flicker.
  • the first isolation switch module 11 further includes a first resistor R1, the first terminal of the first transistor M1 and the control terminal of the second transistor M2 are electrically connected to the write operation control signal input terminal 19 through the first resistor R1;
  • the two isolation switch module 12 further includes a second resistor R2. Both the first terminal of the third transistor M3 and the control terminal of the fourth transistor M4 are electrically connected to the write operation control signal input terminal 19 through the second resistor R2.
  • the high-level write operation control signal at the write operation control signal input terminal 19, or the high-level signal at the first end of the first transistor M1 flows through the first resistor R1 to generate a voltage drop, thereby realizing voltage division and current limiting.
  • the high-level write operation control signal at the write operation control signal input terminal 19, or the high-level signal at the first end of the third transistor M3, flows through the second resistor R2 to generate a voltage drop to achieve voltage division and current limiting .

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  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
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Abstract

La présente invention concerne un dispositif de déconnexion de bus en série (10) et un panneau d'affichage à cristaux liquides. L'invention est pourvue de modules de déconnexion (11, 12) de telle sorte que lorsqu'une tension de référence (VCOM) doit être régulée de manière à réguler un papillotement de tension, un bus 12C d'un système de pilotage de télévision et un bus 12C d'un panneau de commande sont connectés et communiquent l'un avec l'autre. De plus, le bus 12C du tableau de commande ne lance pas d'activités, et un système hôte reconnaît uniquement les activités du bus 12C du système de pilotage de télévision. Le bus 12C du système de commande de télévision et le bus 12C du panneau de commande communiquent l'un avec l'autre. Lorsque le système de commande de télévision doit réaliser une recherche de canal ou lancer d'autres activités, le bus 12C du système de pilotage de télévision et le bus 12C du panneau de commande sont déconnectés pour empêcher des conflits entre eux.
PCT/CN2019/070741 2018-11-09 2019-01-08 Dispositif de déconnexion de bus en série et panneau d'affichage à cristaux liquides WO2020093587A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201811333428.2 2018-11-09
CN201811333428.2A CN109545157B (zh) 2018-11-09 2018-11-09 一种串行总线隔离装置及液晶显示面板

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WO2020093587A1 true WO2020093587A1 (fr) 2020-05-14

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WO (1) WO2020093587A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
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