Display screen driving circuit

Abstract

The utility model relates to a display screen driving circuit. The display screen driving circuit comprises a display screen chip, a conversion module and a display screen interface module, the conversion module comprises a chip U3 and a matching unit, the matching unit is electrically connected with the chip U3, the display screen chip is electrically connected with the matching unit, and the display screen interface module is electrically connected with the display screen chip. According to the scheme provided by the invention, the display screen driving board can be connected with the intelligent terminal, so that the display screen can display a self-defined picture in a debugging process.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit design, in particular to a display driving circuit. Background Art

[0002] In the related art, the display driving board is mainly operated individually during debugging, that is, after the software is burned, the screen can only be switched according to the existing program settings. If the display needs to display different screens, the program has to be re - edited and burned onto the driving board, and the operation is very cumbersome. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a display driving circuit that can connect the display driving board with an intelligent terminal, so that the display can display custom screens during debugging.

[0004] The purpose of the utility model is achieved by the following technical solutions:

[0005] A display driving circuit is provided in the first aspect of the present application, including: a display chip; a conversion module, including chip U3 and a matching unit, the matching unit is electrically connected to chip U3, and the display chip is electrically connected to the matching unit; a display interface module, electrically connected to the display chip.

[0006] The matching unit includes resistor R35 and resistor R36. The first end of resistor R35 is electrically connected to chip U3, the second end of resistor R35 is electrically connected to the display chip, the first end of resistor R36 is electrically connected to chip U3, and the second end of resistor R36 is electrically connected to the display chip.

[0007] The matching unit further includes resistor R33 and resistor R34. The first end of resistor R33 is electrically connected to chip U3, the second end of resistor R33 is electrically connected to the display chip, the first end of resistor R34 is electrically connected to chip U3, and the second end of resistor R34 is electrically connected to the display chip.

[0008] The conversion module further includes capacitor C22. The first end of capacitor C22 is electrically connected to chip U3, and the second end of capacitor C22 is grounded.

[0009] The conversion module further includes capacitor C21. The first end of capacitor C21 is electrically connected to chip U3, and the second end of capacitor C21 is grounded.

[0010] The matching unit further includes a diode D12. The first end of the diode D12 is electrically connected to the display screen chip, and the second end of the diode D12 is electrically connected to the chip U3.

[0011] The conversion module further includes a serial port unit, and the serial port unit is electrically connected to the display screen chip.

[0012] It further includes a debugging switch module, and the debugging switch module is electrically connected to the display screen chip.

[0013] It further includes a programming module. The programming module includes a button KEY2, a resistor R47, and a triode Q7. The button KEY2 is electrically connected to the first end of the resistor R47, and the second end of the resistor R47 is electrically connected to the triode Q7.

[0014] The programming module further includes a resistor R62 and a triode Q5. The first end of the resistor R62 is electrically connected to the triode Q7, the second end of the resistor R62 is electrically connected to the triode Q5, and the triode Q5 is electrically connected to the display screen chip.

[0015] Compared with the prior art, the present utility model has at least the following advantages:

[0016] By providing a conversion module, during the debugging process, the display screen can be directly connected to the intelligent terminal through a wired connection. The intelligent terminal can send pictures, videos, or other images to be displayed to the display screen chip through the conversion module, and the display screen chip then sends the image to the display screen interface module so that the display screen can display a custom image, thus facilitating the user to perform debugging. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the accompanying drawings required for use in the embodiments will be briefly introduced below.

[0018] Figure 1 It is a functional module diagram of the display screen driving circuit in an embodiment of the present utility model;

[0019] Figure 2 It is a circuit diagram of the display screen chip in an embodiment of the present utility model;

[0020] Figure 3 It is a circuit diagram of the chip U3 and the matching unit in an embodiment of the present utility model;

[0021] Figure 4 It is a circuit diagram of the display screen interface module in an embodiment of the present utility model;

[0022] Figure 5 It is a circuit diagram of the serial port unit in an embodiment of the present utility model;

[0023] Figure 6 This is the circuit diagram of the debugging switch module in an embodiment of the present utility model;

[0024] Figure 7 This is the circuit diagram of the programming module in an embodiment of the present utility model. Detailed implementation manners

[0025] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present application will be more thorough and complete, and can fully convey the scope of the present application to those skilled in the art.

[0026] It should be understood that although the terms "first", "second", "third", etc. may be used in the present application to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0027] Unless otherwise clearly defined and limited, the terms "mounted", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0028] During the debugging process, the display driver board mainly operates in a single-machine mode, that is, after the software is programmed, the screen can only be switched according to the existing program settings. If the display needs to show different screens, the program has to be re-edited and programmed onto the driver board, which is very cumbersome.

[0029] In view of the above problems, the embodiments of the present application provide a display driver circuit that can enable the display to show custom screens without going through the programming process.

[0030] The technical solutions of the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0031] Please refer to Figures 1 to 4, a display driving circuit, comprising: a display chip 100, a conversion module 200 and a display interface module 300. The conversion module 200 includes a chip U3 and a matching unit. The matching unit is electrically connected to the chip U3, the display chip 100 is electrically connected to the matching unit, and the display interface module 300 is electrically connected to the display chip 100.

[0032] It should be noted that the display chip 100 is the main control chip of the display, and its model can be SWM34S. The chip U3 and the matching unit form a USB interface conversion, and the user can connect the display to the smart terminal by plugging in a USB cable. The display interface module 300 is the interface of the display, and the display chip 100 is electrically connected to the display interface module 300 to communicate with the display. Further, by setting the conversion module 200, the display can be directly connected to the smart terminal through a wired connection during the debugging process. The smart terminal can send pictures or videos and other images to be displayed to the display chip through the conversion module 200, and then the display chip 100 sends the images to the display interface module 300, so that the display shows a custom image, thus facilitating the user to debug.

[0033] Please refer to Figure 3 , in an embodiment, the matching unit includes a resistor R35 and a resistor R36. The first end of the resistor R35 is electrically connected to the chip U3, the second end of the resistor R35 is electrically connected to the display chip 100, the first end of the resistor R36 is electrically connected to the chip U3, and the second end of the resistor R36 is electrically connected to the display chip 100. Specifically, the matching unit further includes a resistor R33 and a resistor R34. The first end of the resistor R33 is electrically connected to the chip U3, the second end of the resistor R33 is electrically connected to the display chip 100, the first end of the resistor R34 is electrically connected to the chip U3, and the second end of the resistor R34 is electrically connected to the display chip 100.

[0034] It should be noted that the resistors R35, R36, R33 and R34 are matching resistors for matching the chip U3.

[0035] Please refer to Figure 3 , in an embodiment, the conversion module 200 further includes a capacitor C22. The first end of the capacitor C22 is electrically connected to the chip U3, and the second end of the capacitor C22 is grounded. Specifically, the conversion module 200 further includes a capacitor C21. The first end of the capacitor C21 is electrically connected to the chip U3, and the second end of the capacitor C21 is grounded.

[0036] It should be noted that the capacitors C22 and C21 are filtering capacitors.

[0037] Please refer to Figure 3, in one embodiment, the matching unit further includes a diode D12. The first end of the diode D12 is electrically connected to the display screen chip 100, and the second end of the diode D12 is electrically connected to the chip U3.

[0038] It should be noted that the diode D12 functions to protect the circuit.

[0039] Please refer to Figure 5 , in one embodiment, the conversion module 200 further includes a serial port unit, and the serial port unit is electrically connected to the display screen chip.

[0040] It should be noted that the intelligent terminal of the present application can also communicate with the display screen through the serial port unit.

[0041] Please refer to Figure 6 , in one embodiment, it further includes a debugging switch module, and the debugging switch module is electrically connected to the display screen chip 100.

[0042] It should be noted that when the intelligent terminal is connected to the display screen through USB, the debugging switch module will be activated, causing the display screen to enter the debugging mode to facilitate the intelligent terminal to transmit the display screen.

[0043] Please refer to Figure 7 , in one embodiment, it further includes a programming module. The programming module includes a button KEY2, a resistor R47, and a triode Q7. The button KEY2 is electrically connected to the first end of the resistor R47, and the second end of the resistor R47 is electrically connected to the triode Q7. Specifically, the programming module further includes a resistor R62 and a triode Q5. The first end of the resistor R62 is electrically connected to the triode Q7, the second end of the resistor R62 is electrically connected to the triode Q5, and the triode Q5 is electrically connected to the display screen chip 100.

[0044] It should be noted that the programming unit of the present application needs to connect the intelligent terminal and the display screen through a USB cable and then perform the programming procedure. Specifically, after connecting through the USB cable, press the button KEY2 to generate a high level to turn on the triode Q7. Since the emitter of the triode Q7 is connected to the ground and the collector is at a low level at this time, the triode Q5 is turned on, and a status signal is output to the display screen chip 100 to inform the chip of the current programming status.

[0045] The solutions of the present application have been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of the respective embodiments have their own emphases. For parts not described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments. Those skilled in the art should also be aware that the actions and modules involved in the specification are not necessarily essential to the present application. Additionally, it can be understood that the steps in the method embodiments of the present application can be adjusted, combined, and deleted according to actual needs, and the modules in the device embodiments of the present application can be combined, divided, and deleted according to actual needs.

[0046] The various embodiments of the present application have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to technologies in the market, or to enable other ordinary skill in the art in the technical field to understand the embodiments disclosed herein.

Claims

1. A display screen driving circuit, characterized in that: include: Display chip; A conversion module, including a chip U3 and a matching unit, wherein the matching unit is electrically connected to the chip U3, and the display screen chip is electrically connected to the matching unit; the matching unit includes a resistor R35 and a resistor R36, wherein a first end of the resistor R35 is electrically connected to the chip U3, and a second end of the resistor R35 is electrically connected to the display screen chip, a first end of the resistor R36 is electrically connected to the chip U3, and a second end of the resistor R36 is electrically connected to the display screen chip; the matching unit also includes a resistor R33 and a resistor R34, wherein a first end of the resistor R33 is electrically connected to the chip U3, and a second end of the resistor R33 is electrically connected to the display screen chip, a first end of the resistor R34 is electrically connected to the chip U3, and a second end of the resistor R34 is electrically connected to the display screen chip; The display screen interface module is electrically connected to the display screen chip.

2. The display screen driving circuit according to claim 1, characterized in that: The conversion module further includes a capacitor C22, a first end of the capacitor C22 is electrically connected to the chip U3, and a second end of the capacitor C22 is grounded.

3. The display screen driving circuit according to claim 1, characterized in that: The conversion module further includes a capacitor C21, a first end of the capacitor C21 is electrically connected to the chip U3, and a second end of the capacitor C21 is grounded.

4. The display screen driving circuit according to claim 1, characterized in that: The matching unit further includes a diode D12, a first end of the diode D12 is electrically connected to the display screen chip, and a second end of the diode D12 is electrically connected to the chip U3.

5. The display screen driving circuit according to claim 1, characterized in that: The conversion module further includes a serial port unit, and the serial port unit is electrically connected to the display screen chip.

6. The display screen driving circuit according to claim 1, characterized in that: It also includes a debugging switch module, which is electrically connected to the display screen chip.

7. The display screen driving circuit according to claim 6, characterized in that: It also includes a burning module, which includes a key KEY2, a resistor R47 and a transistor Q7. The key KEY2 is electrically connected to a first end of the resistor R47, and a second end of the resistor R47 is electrically connected to the transistor Q7.

8. The display screen driving circuit according to claim 7, characterized in that: The burning module further includes a resistor R62 and a transistor Q5, wherein a first end of the resistor R62 is electrically connected to the transistor Q7, a second end of the resistor R62 is electrically connected to the transistor Q5, and the transistor Q5 is electrically connected to the display chip.

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