Wire controller circuit for preventing abnormal display

Abstract

The utility model discloses a wire controller circuit capable of preventing abnormal display, which is characterized by comprising a main control module, an LCD display module, an LCM driving chip reset circuit and a power supply control module. The LCM driving chip reset circuit is used for performing voltage reset on the main control module, the LCM driving chip reset circuit comprises a voltage regulating resistor, a voltage stabilizing diode and a filter capacitor, one end of the voltage regulating resistor is electrically connected with the power supply control module, and the other end of the voltage regulating resistor is electrically connected with the LCD display module; the negative electrode of the voltage stabilizing diode is electrically connected with one end of the voltage regulating resistor, and the positive electrode is electrically connected with the other end of the voltage regulating resistor; one end of the filter capacitor is electrically connected with the other end of the voltage regulating resistor and is also electrically connected with the main control module, and the other end of the filter capacitor is grounded. According to the utility model, the voltage stabilizing effect can be realized when a wire controller product is initialized during working, the abnormal state of an LCD display and an LCM is prevented, and the product performance is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of internet of things drive-by-wire, especially relates to a drive-by-wire circuit for preventing abnormal display. BACKGROUND

[0002] Drive-by-wire is an electronic device for controlling electrical equipment, and its main function is to realize the operation and management of equipment through wires or wireless signals. Drive-by-wire is widely used in the fields of household appliances, industrial automation, automobiles, medical equipment, etc. Drive-by-wire is usually equipped with an LCD display screen and touch buttons to facilitate user settings and information viewing.

[0003] However, when the drive-by-wire product works into initialization, due to unstable voltage and large voltage fluctuation, it often leads to non-working of LCM control storage chip, non-working of LCD display, or abnormal LCM command sending. UTILITY MODEL CONTENTS

[0004] The utility model aims at at least solving one of the technical problems existing in the prior art. For this purpose, the utility model provides a drive-by-wire circuit for preventing abnormal display, which can realize voltage stabilization effect when the drive-by-wire product works into initialization by increasing the LCM driving chip reset circuit, prevent abnormal state of LCD display and LCM, and improve product performance.

[0005] The drive-by-wire circuit for preventing abnormal display according to the utility model embodiment comprises:

[0006] A main control module;

[0007] An LCD display module electrically connected with the main control module;

[0008] An LCM driving chip reset circuit electrically connected with the LCD display module and also electrically connected with the main control module, which is used for voltage reset of the main control module;

[0009] A power supply control module electrically connected with the LCM driving chip reset circuit;

[0010] The LCM driving chip reset circuit comprises:

[0011] A voltage regulating resistor, one end of which is electrically connected with the power supply control module, and the other end is electrically connected with the LCD display module;

[0012] A voltage stabilizing diode, the negative electrode of which is electrically connected with one end of the voltage regulating resistor, and the positive electrode is electrically connected with the other end of the voltage regulating resistor;

[0013] A filter capacitor, one end of which is electrically connected with the other end of the voltage regulating resistor and the main control module, and the other end of which is grounded.

[0014] According to some embodiments of the present application, the LCD display module comprises:

[0015] An LCD color screen display chip, which is electrically connected with the main control module, the LCM driving chip reset circuit and the LCD color screen.

[0016] An LCM control code storage module, which is electrically connected with the LCD color screen display chip and is used for storing control instructions.

[0017] An OSD data storage module, which is electrically connected with the LCD color screen display chip and is used for storing picture data required by the LCD color screen.

[0018] According to some embodiments of the present application, the LCD display module further comprises:

[0019] An LCD color screen interface circuit, which is electrically connected with the LCD color screen display chip and is used for electrically connecting with the LCD color screen and displaying system interface.

[0020] A touch screen interface circuit, which is electrically connected with the LCD color screen display chip and is used for receiving touch instructions generated by user pressing through the touch screen.

[0021] According to some embodiments of the present application, the LCD display module further comprises:

[0022] An LCD backlight driving circuit, one end of which is electrically connected with the LCD color screen display chip and the other end of which is electrically connected with the LCD color screen interface circuit, and which is used for lighting the backlight of the LCD color screen and controlling the brightness of the backlight.

[0023] According to some embodiments of the present application, the LCD display module further comprises:

[0024] A real-time clock circuit, which is electrically connected with the LCD color screen display chip and is used for displaying time on the LCD color screen in real time.

[0025] According to some embodiments of the present application, the main control module comprises:

[0026] A main control chip, a signal output pin of the main control chip is electrically connected with the LCD display module, a reset pin of the main control chip is electrically connected with the LCM drive chip reset circuit, and the main control chip is used for outputting a first reset control signal.

[0027] A data recovery button module is electrically connected with an initialization pin of the main control chip and is used for initializing the main control chip.

[0028] According to some embodiments of the utility model, the main control module further comprises:

[0029] A power failure record storage module is electrically connected with the main control chip and is used for storing power failure records of the main control chip.

[0030] According to some embodiments of the utility model, the power supply control module comprises:

[0031] A voltage conversion chip, an input end of the voltage conversion chip is electrically connected with a 5V voltage source, and an output end of the voltage conversion chip is electrically connected with the LCM drive chip reset circuit and is used for providing a 3.3V voltage source.

[0032] The line control device circuit for preventing abnormal display provided by the utility model has the following beneficial effects:

[0033] By embedding the LCM drive chip reset circuit in the line control device circuit, a stable reset voltage pulse is provided for the start-up of the main control module, so that the non-operation of the LCD display module or the abnormal sending of the LCM instruction caused by unstable voltage and large voltage fluctuation when the line control device product works in the initialization process is effectively avoided, and the use performance of the line control device product is improved.

[0034] Additional aspects and advantages of the utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0035] The utility model will be further explained in combination with the drawings and embodiments, wherein:

[0036] Figure 1 The electrical schematic diagram of the LCM drive chip reset circuit and the LCD display module of the line control device circuit for preventing abnormal display of the utility model embodiment;

[0037] Figure 2 The electrical schematic diagram of the main control module of the line control device circuit for preventing abnormal display of the utility model embodiment;

[0038] Figure 3The electrical principle diagram of the LCD backlight drive circuit and the LCD color screen interface circuit of the line control device circuit for preventing abnormal display of the embodiment of the utility model;

[0039] Figure 4 The electrical principle diagram of the LCM control code storage module and the touch screen interface circuit of the line control device circuit for preventing abnormal display of the embodiment of the utility model;

[0040] Figure 5 The electrical principle diagram of the power supply control module of the line control device circuit for preventing abnormal display of the embodiment of the utility model. DETAILED DESCRIPTION

[0041] The embodiments of the utility model are described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as limiting the utility model.

[0042] In the description of the utility model, it is understood that the orientation description, such as up, down, front, back, left, right and the like, is based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a specific orientation, a specific orientation and operation, therefore, cannot be understood as limiting the utility model.

[0043] In the description of the utility model, the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, more than and the like are not included in the number, above, below, within and the like are included in the number. If the first, the second is described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0044] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installation, connection and the like should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the utility model according to the specific content of the technical scheme.

[0045] In the description of the utility model, the description of reference terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0046] With reference to Figures 1-5 The utility model proposes a kind of abnormal display prevention's line control ware circuit, comprising:

[0047] Main control module is used to output first reset control signal;

[0048] LCD display module is electrically connected with main control module;

[0049] LCM driving chip reset circuit is electrically connected with LCD display module, also electrically connected with main control module, LCM driving chip reset circuit is used to carry out voltage reset to main control module;

[0050] Power control module is electrically connected with LCM driving chip reset circuit;

[0051] LCM driving chip reset circuit includes:

[0052] Voltage regulating resistor, one end of voltage regulating resistor is electrically connected with power control module, the other end is electrically connected with LCD display module;

[0053] Stabilized diode, the negative pole of stabilized diode is electrically connected with one end of voltage regulating resistor, the positive pole is electrically connected with the other end of voltage regulating resistor;

[0054] Filtering capacitor, one end of filtering capacitor is electrically connected with the other end of voltage regulating resistor, also electrically connected with main control module, the other end of filtering capacitor is grounded.

[0055] Specifically, in the embodiment, with reference to Figure 2 The electrical schematic diagram of main control module, the 43th pin of main control chip U7 of main control module is SRST reset pin, and is electrically connected with LCM driving chip reset circuit. With reference to Figure 1The part in the dashed box is the LCM driving chip reset circuit, comprising a voltage regulating resistor R20, a voltage stabilizing diode D1 and a filter capacitor C36, the voltage regulating resistor R20 is 4.7KΩ, one end of which is electrically connected with a 3.3V voltage source output by the power control module, the other end of which is electrically connected with a 91st terminal SRST of the LCD color screen display chip U3 of the LCD display module, and is also connected with a SRST reset pin led out from the 43rd pin of the main control chip U7, for providing a stable reset voltage to the main control chip U7; the voltage stabilizing diode D1 is a 1SS355 type diode, the negative electrode of which is electrically connected with one end of the voltage regulating resistor, the positive electrode of which is electrically connected with the other end of the voltage regulating resistor, and is also electrically connected with the 91st pin SRST of the LCD color screen display chip U3 of the LCD display module, for realizing voltage stabilization; one end of the filter capacitor C36 is electrically connected with the other end of the voltage regulating resistor R20, and is also electrically connected with the 43rd pin, i.e. the SRST reset pin, of the main control chip U7 of the main control module, the other end of the filter capacitor C36 is grounded, for realizing filtering. Figure 5 The electrical schematic diagram of the power control module, wherein the output end of the transformer chip U1 is electrically connected with the voltage regulating resistor R20 of the LCM driving chip reset circuit, for providing a stable 3.3V voltage source.

[0056] When the drive-by-wire controller product of the embodiment enters initialization, the main control chip U7 sends a first reset control signal to the LCD color screen display chip U3 of the LCD display module, then the LCD color screen display chip U3 sends a second reset control signal (the second reset control signal is a low-level signal) to the LCM driving chip reset circuit through the 91st pin SRST, so as to start the LCM driving chip reset circuit, reset the main control chip U7 through the SRST reset pin connected with the main control chip U7, and prevent display failure. More specifically, the second reset control signal is a low-level signal, the 3.3V voltage source is output with a stable 3.0V voltage to the SRST reset pin after voltage reduction of the voltage regulating resistor R20 and voltage stabilization of the voltage stabilizing diode D1 and filtering of the filter capacitor C36, so as to prevent the main control chip U7 from being dead or stuck.

[0057] Referring to Figure 1 and Figure 4 Further, in some embodiments of the utility model, the LCD display module comprises:

[0058] The LCD color screen display chip is electrically connected with the main control module, and is also electrically connected with the LCM driving chip reset circuit, and is also used for being electrically connected with the LCD color screen;

[0059] The LCM control code storage module is electrically connected with the LCD color screen display chip, and the LCM control code storage module is used for storing control instructions;

[0060] The OSD data storage module is electrically connected with the LCD color screen display chip and is used for storing picture data required by the LCD color screen.

[0061] Specifically, in the embodiment, referring to Figure 1 , the LCD color screen display chip U3 is electrically connected with the master control chip U7 of the master control module and is also electrically connected with the reset circuit of the LCM driving chip, is used for receiving the first reset control signal and generating the second reset control signal according to the first reset control signal, and is also used for being electrically connected with the LCD color screen through the CCN3 interface of the LCD color screen interface circuit; the LCM control code storage module is electrically connected with the LCD color screen display chip U3, and the LCM control code storage module is used for storing control instructions, referring to Figure 4 , the LCM control code storage module includes the chip U6 and other peripherals electrically connected with the chip U6, the chip U6 adopts the chip of W25Q32JVSS1 model and is used for storing control instructions; the OSD data storage module is electrically connected with the LCD color screen display chip U3 and is used for storing picture data required by the LCD color screen.

[0062] When the initialization of the drive-by-wire controller is completed, the master control chip U7, the LCD color screen display chip U3 and the LCM control code storage module formally start to work, the master control chip U7 sends control instructions to the LCD color screen display chip U3, the LCD color screen display chip U3 is used for displaying a system interface and calling picture data required by the LCD color screen stored in the OSD data storage module, and the picture information is displayed through the LCD color screen; after the related function interface is displayed on the LCD color screen, the user selects the interface through the man-machine operation interface, the LCD color screen display chip sends processing instructions to the LCM control code storage module according to the operation of the user, the chip U6 of the LCM control code storage module searches the stored related instructions and executes related operations.

[0063] Referring to Figure 3 and Figure 4 , further, in some embodiments of the utility model, the LCD display module further includes:

[0064] The LCD color screen interface circuit is electrically connected with the LCD color screen display chip, and the LCD color screen interface circuit is used for being electrically connected with the LCD color screen, and the LCD color screen is used for displaying a system interface.

[0065] The touch screen interface circuit is electrically connected with the LCD color screen display chip, and the touch screen interface circuit is used for receiving touch instructions generated by user pressing through the touch screen.

[0066] Specifically, in the embodiment, referring to Figure 3The LCD color screen interface circuit comprises an interface terminal CCN3, and resistors RN1-RN8 and RN16 connected with the interface terminal CCN3, that is, the interface terminal CCN3 is electrically connected with the interface of the LCD color screen display chip U3 through the resistors, the interface terminal CCN3 of the LCD color screen interface circuit is used for being electrically connected with an external LCD color screen, and is used for transmitting control instructions and image information and the like. Figure 4 The touch screen interface circuit comprises an interface terminal CCN2, transient voltage suppression diodes TVS1, TVS2 and TVS5, and resistors RN9 and RN17 and the like, and is used for being connected with an external touch screen and receiving a touch instruction generated by user pressing through the touch screen.

[0067] Referring to Figure 3 Further, in some embodiments of the utility model, the LCD display module further comprises:

[0068] The LCD backlight driving circuit is electrically connected with the LCD color screen display chip at one end and is electrically connected with the LCD color screen interface circuit at the other end, and is used for lighting the backlight of the LCD color screen and controlling the brightness of the backlight.

[0069] Specifically, in the embodiment, referring to Figure 3 The LCD backlight driving circuit comprises a chip U9 and related components connected with the chip U9, the model of the chip U9 is BIT3269, the No. 4 pin of the chip U9 is electrically connected with the BL_OUT pin of the LCD color screen display chip U3, and the other pins are electrically connected with the interface terminal CCN3 of the LCD color screen interface circuit, and are used for lighting the backlight of the LCD color screen and controlling the brightness of the backlight.

[0070] Referring to Figure 1 Further, in some embodiments of the utility model, the LCD display module further comprises:

[0071] The real-time clock circuit is electrically connected with the LCD color screen display chip, and is used for displaying time on the LCD color screen in real time.

[0072] Specifically, in the embodiment, referring to Figure 1 The real-time clock circuit comprises a chip U4, a crystal oscillator Y2 and other components connected with the chip U4 and the crystal oscillator Y2, the chip U4 of the real-time clock circuit is electrically connected with the LCD color screen display chip U3, and is used for timing and displaying time on the LCD color screen in real time.

[0073] Referring to Figure 2 Further, in some embodiments of the utility model, the main control module comprises:

[0074] The main control chip is electrically connected with the LCD display module through a signal output pin, and is electrically connected with the reset circuit of the LCM driving chip through a reset pin, and is used for outputting a first reset control signal.

[0075] The data recovery button module is electrically connected with the initialization pin of the main control chip, and is used for initializing the main control chip.

[0076] Specifically, in the embodiment, referring to Figure 2 , the main control chip is the chip U7, the main control chip U7 is electrically connected with the LCD color screen display chip U3 through a plurality of signal output pins, the reset pin of the main control chip U7 is the No. 43 pin SRST, and is electrically connected with the filter capacitor C36 of the reset circuit of the LCM driving chip, and is used for receiving the stable 3V reset voltage output by the reset circuit of the LCM driving chip. The data recovery button module includes a button SW1, which is electrically connected with the initialization pin M_RST of the main control chip U7, and is used for initializing the main control chip U7.

[0077] Referring to Figure 2 Further, in some embodiments of the utility model, the main control module further includes:

[0078] The power failure record storage module is electrically connected with the main control chip, and is used for storing the power failure record of the main control chip.

[0079] Specifically, in the embodiment, referring to Figure 2 The power failure record storage module is the MCU EEPROM, which includes the chip U8 and the C48, R32 and R33 connected with the chip U8, the model of the chip U8 is 24C16, and is used for storing the power failure record of the main control chip U7.

[0080] Referring to Figure 2 Further, in some embodiments of the utility model, the power supply control module includes:

[0081] The transformer chip is electrically connected with the 5V voltage source through an input end, and is electrically connected with the reset circuit of the LCM driving chip through an output end, and is used for providing a 3.3V voltage source.

[0082] Specifically, in the embodiment, the transformer chip is the chip U1, which is used for converting the 5V voltage source into a 3.3V voltage source and outputting to the reset circuit of the LCM driving chip and the like, and the filtering effects of C1, C2, C3, C4 and C5 ensure the stability of the output voltage source; in addition, the power supply control module further includes the transformer chip U2 of other specifications, which is used for converting the 5V voltage source into a 1.8V voltage source and providing to other modules, so that the voltage can be converted into the working voltage suitable for each module.

[0083] The utility model embodiment has been explained in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiment, still can make various changes in the knowledge range of the ordinary skill in the art who possesses under the premise of not departing from the utility model's tenet. Besides, the embodiment and the feature in the embodiment of the utility model can be combined mutually under the condition of not conflicting.

Claims

1. A drive-by-wire circuit that prevents abnormal display, characterized by, The application relates to a display module for a liquid crystal display (LCD) color screen, which comprises the following parts: a main control module; an LCD display module electrically connected with the main control module; an LCM driving chip reset circuit electrically connected with the LCD display module and also electrically connected with the main control module, which is used for voltage reset of the main control module; a power supply control module electrically connected with the LCM driving chip reset circuit; the LCM driving chip reset circuit comprises the following parts: a voltage regulating resistor, one end of which is electrically connected with the power supply control module, and the other end of which is electrically connected with the LCD display module; a voltage stabilizing diode, the negative electrode of which is electrically connected with one end of the voltage regulating resistor, and the positive electrode of which is electrically connected with the other end of the voltage regulating resistor; and a filter capacitor, one end of which is electrically connected with the other end of the voltage regulating resistor, and the other end of which is electrically connected with the main control module and grounded; the LCD display module comprises the following parts: an LCD color screen display chip electrically connected with the main control module, also electrically connected with the LCM driving chip reset circuit, and also electrically connected with an LCD color screen; an LCM control code storage module electrically connected with the LCD color screen display chip, which is used for storing control instructions; and an OSD data storage module electrically connected with the LCD color screen display chip, which is used for storing picture data required by the LCD color screen; the LCD display module further comprises the following parts: an LCD color screen interface circuit electrically connected with the LCD color screen display chip, which is used for electrical connection with the LCD color screen and display of a system interface; and a touch screen interface circuit electrically connected with the LCD color screen display chip, which is used for receiving touch instructions generated by user pressing through a touch screen; the LCD display module further comprises the following parts: an LCD backlight driving circuit, one end of which is electrically connected with the LCD color screen display chip, and the other end of which is electrically connected with the LCD color screen interface circuit, which is used for lighting the backlight of the LCD color screen and controlling the brightness of the backlight; the LCD display module further comprises the following parts: a real-time clock circuit electrically connected with the LCD color screen display chip, which is used for real-time display of time on the LCD color screen; the main control module comprises the following parts: a main control chip, the signal output pin of which is electrically connected with the LCD display module, the reset pin of which is electrically connected with the LCM driving chip reset circuit, and which is used for output of a first reset control signal; a data recovery button module electrically connected with the initialization pin of the main control chip, which is used for initialization of the main control chip; the main control module further comprises the following parts: a power-off record storage module electrically connected with the main control chip, which is used for storage of power-off records of the main control chip; and the power supply control module comprises the following parts: ​ ​ ​ ​ ​ ​ ​ ​ 2. The abnormal display prevention drive-by-wire circuit according to claim 1, characterized by, ​ ​ ​ ​ 3. The abnormal display prevention drive-by-wire circuit according to claim 2, characterized by, ​ ​ ​ 4. The abnormal display prevention drive-by-wire circuit according to claim 2, characterized by, ​ ​ 5. The abnormal display prevention drive-by-wire circuit according to claim 2, characterized by, ​ ​ 6. The abnormal display prevention drive-by-wire circuit according to claim 1, characterized by, ​ ​ ​ 7. The abnormal display prevention drive-by-wire circuit according to claim 6, characterized by, ​ ​ 8. The abnormal display prevention drive-by-wire circuit according to claim 1, characterized by, ​ A voltage conversion chip, an input end of the voltage conversion chip is electrically connected with a 5V voltage source, and an output end of the voltage conversion chip is electrically connected with a reset circuit of the LCM driving chip, for providing a 3.3V voltage source.

Images