LCD display function circuit

Abstract

The utility model discloses a kind of LCD display function circuit, it is related to display field, the LCD display function circuit includes: single-chip module, for through and inverter, charger communication, obtains the information of inverter, charger;Control LCD drive chip module, LCD backlight frequency module work;LCD backlight screen module, for based on the control of single-chip module, control backlight screen lighting;LCD drive chip module, for based on the control of single-chip module, drive LCD display screen module work;LCD display screen module, for display the information of charger, inverter when working;The beneficial effects of the utility model are: the utility model sends drive signal by single-chip module, collocation LCD display drive chip, complete function display, this design method is low in cost, simple in design, complete in function, short in development cycle, suitable for all chargers on market, inverter and other need display function's electrical appliance.

Description

Technical Field

[0001] This utility model relates to the field of display, specifically to an LCD display functional circuit. Background Technology

[0002] With the development of battery technology, there are more and more types and models of chargers and inverters on the market, as well as more and more operating states of chargers and inverters, and more and more parameters that need to be viewed; therefore, there are display circuits that display relevant data.

[0003] However, existing display circuits are only suitable for LCD and LED displays, not liquid crystal displays, and therefore need to be improved. Utility Model Content

[0004] The purpose of this invention is to provide an LCD display function circuit to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An LCD display function circuit includes:

[0007] The microcontroller module is used to communicate with the inverter and charger to obtain information from them; and to control the operation of the LCD driver chip module and the LCD backlight module.

[0008] The LCD backlight module is used for control based on the microcontroller module to control the backlight to light up;

[0009] LCD driver chip module, used to drive the LCD display module to work based on the control of the microcontroller module;

[0010] The LCD display module is used to display information about the charger and inverter during operation.

[0011] The microcontroller module is connected to the LCD driver chip module and the LCD backlight module, and the LCD driver chip module is connected to the LCD display module.

[0012] As a further embodiment of this utility model: the LCD backlight module includes resistor R29, resistor R30, transistor Q2, resistor R20, resistor R17, and interface JP1. The base of transistor Q2 is connected to one end of resistor R29 and one end of resistor R30. The other end of resistor R29 is connected to the microcontroller module. The other end of resistor R30 is grounded. The emitter of transistor Q2 is grounded. The collector of transistor Q2 is connected to the second end of interface JP1. The first end of interface JP1 is connected to one end of resistor R17 and one end of resistor R20. The other end of resistor R17 is connected to the other end of resistor R20 and a 5V voltage. Interface JP1 is externally connected to the LCD backlight board.

[0013] As a further improvement of this invention, transistor Q2 is an NPN transistor.

[0014] As a further embodiment of this utility model: the LCD driver chip module includes chip U6, model number FZH1695. Pin 6 of chip U6 is connected to one end of resistor R22, one end of capacitor C30, and the microcontroller module. The other end of resistor R22 is connected to 5V voltage, and the other end of capacitor C30 is grounded. Pin 7 of chip U6 is connected to one end of resistor R23, one end of capacitor C31, and the microcontroller module. The other end of resistor R23 is connected to 5V voltage, and the other end of capacitor C31 is grounded. Pin 8 of chip U6 is connected to one end of resistor R24, one end of capacitor C32, and the microcontroller module. The other end of resistor R24 ​​is connected to 5V voltage, and the other end of capacitor C32 is grounded. Pins 1 to 5, pins 12 to 15, and pins 18 to 28 of chip U6 are connected to the LCD display module.

[0015] As a further improvement of this utility model: the LCD display module includes a display screen U3, and pins 1 to 20 of the display screen U3 are connected to the LCD driver chip module.

[0016] Compared with the prior art, the advantages of this utility model are: This utility model sends drive signals through a microcontroller module and, together with an LCD display driver chip, completes the function display. This design method is low in cost, simple in design, full in function, and has a short development cycle. It is suitable for all chargers, inverters and other electrical appliances that require display functions on the market. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of an LCD display circuit.

[0018] Figure 2 This is a circuit diagram of an LCD display function circuit. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1 An LCD display function circuit, comprising:

[0021] The microcontroller module is used to communicate with the inverter and charger to obtain information from them; and to control the operation of the LCD driver chip module and the LCD backlight module.

[0022] The LCD backlight module is used for control based on the microcontroller module to control the backlight to light up;

[0023] LCD driver chip module, used to drive the LCD display module to work based on the control of the microcontroller module;

[0024] The LCD display module is used to display information about the charger and inverter during operation.

[0025] The microcontroller module is connected to the LCD driver chip module and the LCD backlight module, and the LCD driver chip module is connected to the LCD display module.

[0026] In a specific embodiment: Please refer to Figure 1 The control in the microcontroller module is accomplished by the microcontroller, which is a common function of microcontrollers and does not involve any methodological innovation.

[0027] In this embodiment: Please refer to Figure 2 The LCD backlight module includes resistors R29 and R30, transistor Q2, resistors R20 and R17, and interface JP1. The base of transistor Q2 is connected to one end of resistor R29 and one end of resistor R30. The other end of resistor R29 is connected to the microcontroller module. The other end of resistor R30 is grounded. The emitter of transistor Q2 is grounded. The collector of transistor Q2 is connected to the second end of interface JP1. The first end of interface JP1 is connected to one end of resistor R17 and one end of resistor R20. The other end of resistor R17 is connected to the other end of resistor R20 and a 5V voltage. Interface JP1 is connected to an external LCD backlight board.

[0028] When the base of transistor Q2 receives a high level output from the microcontroller module, transistor Q2 turns on, causing the second terminal of interface JP1 to be grounded through transistor Q2. This creates a voltage difference between the first and second terminals of interface JP1, energizing the external LCD backlight panel and turning it on.

[0029] In this embodiment: Please refer to Figure 2 Transistor Q2 is an NPN transistor.

[0030] Transistor Q2 can also be replaced by other types of switching transistors, such as IGBT transistors.

[0031] In this embodiment: Please refer to Figure 2The LCD driver chip module includes chip U6, model number FZH1695. Pin 6 of chip U6 is connected to one end of resistor R22, one end of capacitor C30, and the microcontroller module. The other end of resistor R22 is connected to 5V, and the other end of capacitor C30 is grounded. Pin 7 of chip U6 is connected to one end of resistor R23, one end of capacitor C31, and the microcontroller module. The other end of resistor R23 is connected to 5V, and the other end of capacitor C31 is grounded. Pin 8 of chip U6 is connected to one end of resistor R24, one end of capacitor C32, and the microcontroller module. The other end of resistor R24 ​​is connected to 5V, and the other end of capacitor C32 is grounded. Pins 1 to 5, pins 12 to 15, and pins 18 to 28 of chip U6 are connected to the LCD display module.

[0032] Resistor R22 and capacitor C30, resistor R23 and capacitor C31, resistor R24 ​​and capacitor C32 are the pull-up resistors and filter capacitors for signals CS, WR and DATA, respectively. The three signals CS, WR and DATA are controlled by the microcontroller module and are active low. Chip U6 is an LCD driver chip with built-in driver program. When the charger or inverter needs to display voltage, current or other display signals, the microcontroller module sends signals CS, WR and DATA to chip U6, and chip U6 then drives the LCD screen to display the required numbers or other data.

[0033] In this embodiment: Please refer to Figure 2 The LCD display module includes display U3, and pins 1 to 20 of display U3 are connected to the LCD driver chip module.

[0034] The display screen can be a standard display screen; there are no restrictions on its model.

[0035] The working principle of this utility model is as follows: the microcontroller module is used to communicate with the inverter and charger to obtain information about the inverter and charger; control the operation of the LCD driver chip module and the LCD backlight module; the LCD backlight module is used to control the backlight screen to light up based on the control of the microcontroller module; the LCD driver chip module is used to drive the LCD display module to work based on the control of the microcontroller module; the LCD display module is used to display information about the charger and inverter when working.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An LCD display function circuit, characterized in that, The LCD display function circuit includes: The microcontroller module is used to communicate with the inverter and charger to obtain information from them; and to control the operation of the LCD driver chip module and the LCD backlight module. The LCD backlight module is used for control based on the microcontroller module to control the backlight to light up; LCD driver chip module, used to drive the LCD display module to work based on the control of the microcontroller module; The LCD display module is used to display information about the charger and inverter during operation. The microcontroller module is connected to the LCD driver chip module and the LCD backlight module, and the LCD driver chip module is connected to the LCD display module.

2. The LCD display function circuit according to claim 1, characterized in that, The LCD backlight module includes resistors R29 and R30, transistor Q2, resistors R20 and R17, and interface JP1. The base of transistor Q2 is connected to one end of resistor R29 and one end of resistor R30. The other end of resistor R29 is connected to the microcontroller module. The other end of resistor R30 is grounded. The emitter of transistor Q2 is grounded. The collector of transistor Q2 is connected to the second end of interface JP1. The first end of interface JP1 is connected to one end of resistor R17 and one end of resistor R20. The other end of resistor R17 is connected to the other end of resistor R20 and a 5V voltage. Interface JP1 is connected to an external LCD backlight board.

3. The LCD display function circuit according to claim 2, characterized in that, Transistor Q2 is an NPN transistor.

4. The LCD display function circuit according to claim 1, characterized in that, The LCD driver chip module includes chip U6, model number FZH1695. Pin 6 of chip U6 is connected to one end of resistor R22, one end of capacitor C30, and the microcontroller module. The other end of resistor R22 is connected to 5V, and the other end of capacitor C30 is grounded. Pin 7 of chip U6 is connected to one end of resistor R23, one end of capacitor C31, and the microcontroller module. The other end of resistor R23 is connected to 5V, and the other end of capacitor C31 is grounded. Pin 8 of chip U6 is connected to one end of resistor R24, one end of capacitor C32, and the microcontroller module. The other end of resistor R24 ​​is connected to 5V, and the other end of capacitor C32 is grounded. Pins 1 to 5, pins 12 to 15, and pins 18 to 28 of chip U6 are connected to the LCD display module.

5. The LCD display function circuit according to claim 1, characterized in that, The LCD display module includes a display U3, whose pins 1 to 20 are connected to the LCD driver chip module.

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