Display control circuit

Abstract

The utility model discloses a display control circuit comprising a single-chip microcomputer, a power supply selection module, a screen backlight control module, a screen backlight enabling module, a screen brightness adjusting module, a display connection interface and a backlight pin module. The display connection interface, the power supply selection module, the screen brightness adjustment module, the screen backlight control module and the screen backlight enabling module are all connected with the single-chip microcomputer, and the backlight pin module is connected with the screen backlight control module and the screen backlight enabling module. The display brightness can be adjusted, and 3V, 5V and 12V voltages can be provided through the power supply selection module, so that the LED display screen is suitable for displays with different requirements, and the application is wider.

Description

Technical Field

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

[0002] With the development of science and technology, computers have become an essential tool for people's daily office and entertainment. In a desktop computer, it is composed of a computer host and a display. The current driving circuit of a computer display can often only be limited to a fixed input power supply. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, an object of the present invention is to provide a display control circuit which can support displays with different voltages.

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

[0005] The utility model provides a display control circuit, comprising a single-chip microcomputer, a power supply selection module, a screen backlight control module, a screen backlight enabling module, a screen brightness adjustment module, a display connection interface and a backlight pin module, wherein the display connection interface, the power supply selection module, the screen brightness adjustment module, the screen backlight control module and the screen backlight enabling module are all connected to the single-chip microcomputer, and the backlight pin module is respectively connected to the screen backlight control module and the screen backlight enabling module.

[0006] In the present utility model, as an optional embodiment, the model of the single chip microcomputer is CH7515A or CH7516A.

[0007] In the present utility model, as an optional embodiment, the power supply selection module includes a display connection pin, a resistor R30112, a resistor R30116, a resistor R30128, a resistor R30132, a resistor R30141, a resistor R319, a field effect transistor Q7030, a field effect transistor AO4419, a field effect transistor QF5 and a capacitor C20945, one end of the resistor R30116 is connected to the single-chip microcomputer, and the other end of the resistor R30116, one end of the resistor R30112 and one end of the resistor R30132 are all connected to the field effect transistor The gate of Q7030, the drain of the field effect transistor Q7030, one end of the resistor R30128 and the gate of the field effect transistor QF5 are all connected to one end of the resistor R30141, the other end of the resistor R30141 is connected to the source of the field effect transistor AO4419 through the capacitor C20945, and the other end of the resistor R30141 is also connected to the gate of the field effect transistor AO4419, the drain of the field effect transistor QF5 is connected to a DC current through the resistor R319, and the other end of the resistor R30128 and the source of the field effect transistor AO4419 are both connected to the display pin header.

[0008] In the utility model, as an optional embodiment, the screen backlight control module includes a full-line field effect tube Q7029, a resistor R30111, a resistor R30119, a resistor R30114, and a resistor R30129, one end of the resistor R30111 and one end of the resistor R30119 are both connected to an external display, one end of the resistor R30114 is connected to a single-chip computer, the other end of the resistor R30111, the other end of the resistor R30114 and one end of the resistor R30125 are all connected to the first gate of the full-line field effect tube Q7029, one end of the resistor R30134 and the second drain of the full-line field effect tube Q7029 are both connected to the backlight pin module, and the first drain and the second gate of the full-line field effect tube Q7029 are both connected to the display pin through the resistor R30129.

[0009] In the present utility model, as an optional embodiment, the screen backlight enabling module includes a full-line field effect tube Q7031, a resistor R12314, a resistor R30115, a resistor R30146, a resistor R30107, a resistor R30106, a diode D106, a diode D107, a diode D521, a capacitor C20933, and a capacitor C20934, one end of the resistor R12314 and the cathode of the diode D521 are connected to an external display, and the anode of the diode D521, one end of the capacitor C20933, one end of the resistor R30146, and one end of the resistor R301115 are connected to the full-line field effect tube Q703 1, the cathode of the diode D106, the cathode of the diode D107 and the other end of the resistor R30115 are all connected to the enable pin of the single-chip microcomputer, the anode of the diode D106 and the anode of the diode D107 are all connected to the single-chip microcomputer, one end of the capacitor C20934 and one end of the resistor R30107 are all connected to the second drain of the full-line field effect tube Q7031, one end of the resistor R30106 is respectively connected to the first drain and the second gate of the full-line field effect tube Q7031, the other end of the resistor R30106 is connected to a DC power, the other end of the resistor R30107 is connected to the display pin, and the second drain of the full-line field effect tube Q7031 is also connected to the backlight pin module.

[0010] In the present utility model, as an optional embodiment, the screen brightness adjustment module includes a resistor R30142, a resistor R12301, a resistor R12394, a resistor R30135, a resistor R30143, a resistor R30126, a capacitor C20951, a capacitor C20949, and a capacitor C20950, one end of the resistor R30142, one end of the resistor R12304, and one end of the resistor R30143 are all connected to the display pin header, and the resistor R30142 is connected to the display pin header. The other end of 142 and one end of resistor R12301 are both connected to the single chip microcomputer, the other end of resistor R12301 is grounded through capacitor C20951, the other end of resistor R12304 and one end of resistor R30135 are both connected to the single chip microcomputer, the other end of resistor R30135 is grounded through capacitor C20949, the other end of resistor R30143 and one end of resistor R30126 are both connected to the single chip microcomputer, the other end of resistor R30126 is grounded through capacitor C20950.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] The display control circuit of the utility model can adjust the display brightness, and can provide 3V, 5V, and 12V voltages through the power supply selection module, which is suitable for displays with different requirements, making the application more extensive. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram of the module structure of a display control circuit according to an embodiment of the utility model;

[0014] Figure 2 A schematic diagram of the circuit structure of a single chip microcomputer according to an embodiment of the utility model;

[0015] Figure 3 This is a schematic diagram of the circuit structure of the power supply selection module of an embodiment of the utility model;

[0016] Figure 4 This is a schematic diagram of the circuit structure of the screen backlight control module of an embodiment of the utility model;

[0017] Figure 5 This is a schematic diagram of the circuit structure of the screen backlight enabling module of an embodiment of the utility model;

[0018] Figure 6 This is a schematic diagram of the circuit structure of the screen brightness adjustment module of an embodiment of the utility model;

[0019] Figure 7 This is a schematic diagram of the circuit structure of the backlight pin module of an embodiment of the utility model;

[0020] Figure 8This is a schematic diagram of the circuit structure of the first display connection interface of an embodiment of the utility model;

[0021] Fig. 9 It is a schematic diagram of the circuit structure of the second display connection interface of an embodiment of the utility model. DETAILED DESCRIPTION

[0022] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described. It should be noted that, under the premise of no conflict, the various embodiments described below or the various technical features can be arbitrarily combined to form a new embodiment. Except for special instructions, the materials and equipment used in this embodiment can be purchased from the market. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar numbers throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0023] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In the description of the present application, "plurality" means two or more, unless otherwise precisely and specifically specified.

[0024] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be connected through an intermediary medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0025] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0026] The embodiment of the present application provides a display control circuit, which can adjust the display brightness and can provide 3V, 5V, and 12V voltages through a power supply selection module, which is suitable for displays with different needs, making it more widely used.

[0027] Please refer to Figure 1-9 As shown, a display control circuit provided in this embodiment includes a single-chip microcomputer, a power supply selection module, a screen backlight control module, a screen backlight enabling module, a screen brightness adjustment module, a display connection interface and a backlight pin module, wherein the display connection interface, the power supply selection module, the screen brightness adjustment module, the screen backlight control module and the screen backlight enabling module are all connected to the single-chip microcomputer, and the backlight pin module is respectively connected to the screen backlight control module and the screen backlight enabling module. Among them, the display connection interface includes a first display connection interface and a second display connection interface.

[0028] Specifically, the model of the single-chip microcomputer is CH7515A or CH7516A. The power supply selection module includes a display connection pin, a resistor R30112, a resistor R30116, a resistor R30128, a resistor R30132, a resistor R30141, a resistor R319, a field effect transistor Q7030, a field effect transistor AO4419, a field effect transistor QF5 and a capacitor C20945. One end of the resistor R30116 is connected to the single-chip microcomputer, and the other end of the resistor R30116, one end of the resistor R30112 and one end of the resistor R30132 are all connected to the gate of the field effect transistor Q7030. The drain of transistor Q7030, one end of resistor R30128 and the gate of field effect transistor QF5 are all connected to one end of resistor R30141. The other end of resistor R30141 is connected to the source of field effect transistor AO4419 through capacitor C20945, and the other end of resistor R30141 is also connected to the gate of field effect transistor AO4419. The drain of field effect transistor QF5 is connected to a DC current through resistor R319, and the other end of resistor R30128 and the source of field effect transistor AO4419 are both connected to the display pin header.

[0029] Combination Figure 4The screen backlight control module includes a full-line field effect tube Q7029, a resistor R30111, a resistor R30119, a resistor R30114, and a resistor R30129. One end of the resistor R30111 and one end of the resistor R30119 are both connected to an external display, one end of the resistor R30114 is connected to a single-chip computer, the other end of the resistor R30111, the other end of the resistor R30114, and one end of the resistor R30125 are all connected to the first gate of the full-line field effect tube Q7029, one end of the resistor R30134 and the second drain of the full-line field effect tube Q7029 are both connected to the backlight pin module, and the first drain and the second gate of the full-line field effect tube Q7029 are both connected to the display pin through the resistor R30129.

[0030] Combination Figure 5 The screen backlight enabling module includes a full-line field effect tube Q7031, a resistor R12314, a resistor R30115, a resistor R30146, a resistor R30107, a resistor R30106, a diode D106, a diode D107, a diode D521, a capacitor C20933, and a capacitor C20934. One end of the resistor R12314 and the cathode of the diode D521 are connected to an external display. The anode of the diode D521, one end of the capacitor C20933, one end of the resistor R30146, and one end of the resistor R301115 are connected to the first gate of the full-line field effect tube Q7031. The diode The cathode of D106, the cathode of diode D107 and the other end of resistor R30115 are all connected to the enable pin of the microcontroller, the anode of diode D106 and the anode of diode D107 are all connected to the microcontroller, one end of capacitor C20934 and one end of resistor R30107 are all connected to the second drain of the full-line field effect transistor Q7031, one end of resistor R30106 is respectively connected to the first drain and the second gate of the full-line field effect transistor Q7031, the other end of resistor R30106 is connected to a DC power, the other end of resistor R30107 is connected to the display pin header, and the second drain of the full-line field effect transistor Q7031 is also connected to the backlight pin module.

[0031] Combination Figure 6The screen brightness adjustment module includes a resistor R30142, a resistor R12301, a resistor R12394, a resistor R30135, a resistor R30143, a resistor R30126, a capacitor C20951, a capacitor C20949, and a capacitor C20950. One end of the resistor R30142, one end of the resistor R12304, and one end of the resistor R30143 are connected to the display pin header, and the other end of the resistor R30142 is connected to the resistor R12304. One end of R12301 is connected to the single-chip microcomputer, the other end of resistor R12301 is grounded through capacitor C20951, the other end of resistor R12304 and one end of resistor R30135 are connected to the single-chip microcomputer, the other end of resistor R30135 is grounded through capacitor C20949, the other end of resistor R30143 and one end of resistor R30126 are connected to the single-chip microcomputer, and the other end of resistor R30126 is grounded through capacitor C20950.

[0032] Although only certain components and embodiments of the present application have been illustrated and described, many modifications and changes may be conceived by those skilled in the art without actually departing from the scope and spirit of the claims, such as changes in the size, dimensions, structure, shape and proportion of the various elements, mounting arrangements, material usage, color, orientation, etc.

[0033] The above-mentioned implementation mode is only a preferred implementation mode of the embodiment of the utility model, and cannot be used to limit the scope of protection of the embodiment of the utility model. Any non-substantial changes and replacements made by technical personnel in this field on the basis of the embodiment of the utility model shall fall within the scope of protection required by the embodiment of the utility model.

Claims

1. A display control circuit, characterized in that: It includes a single-chip microcomputer, a power supply selection module, a screen backlight control module, a screen backlight enabling module, a screen brightness adjustment module, a display connection interface and a backlight pin module. The display connection interface, power supply selection module, screen brightness adjustment module, screen backlight control module and screen backlight enabling module are all connected to the single-chip microcomputer, and the backlight pin module is respectively connected to the screen backlight control module and the screen backlight enabling module.

2. The display control circuit according to claim 1, characterized in that: The model of the single chip microcomputer is CH7515A or CH7516A.

3. The display control circuit according to claim 2, characterized in that: The power supply selection module includes a display connection pin, a resistor R30112, a resistor R30116, a resistor R30128, a resistor R30132, a resistor R30141, a resistor R319, a field effect transistor Q7030, a field effect transistor AO4419, a field effect transistor QF5 and a capacitor C20945. One end of the resistor R30116 is connected to the single-chip microcomputer, and the other end of the resistor R30116, one end of the resistor R30112 and one end of the resistor R30132 are all connected to the gate of the field effect transistor Q7030. The drain of the field effect transistor Q7030, one end of the resistor R30128 and the gate of the field effect transistor QF5 are all connected to one end of the resistor R30141, the other end of the resistor R30141 is connected to the source of the field effect transistor AO4419 through the capacitor C20945, and the other end of the resistor R30141 is also connected to the gate of the field effect transistor AO4419, the drain of the field effect transistor QF5 is connected to a DC current through the resistor R319, and the other end of the resistor R30128 and the source of the field effect transistor AO4419 are both connected to the display pin header.

4. The display control circuit according to claim 2, characterized in that: The screen backlight control module includes a full-line field effect tube Q7029, a resistor R30111, a resistor R30119, a resistor R30114, and a resistor R30129. One end of the resistor R30111 and one end of the resistor R30119 are both connected to an external display, one end of the resistor R30114 is connected to a single-chip computer, the other end of the resistor R30111, the other end of the resistor R30114, and one end of the resistor R30125 are all connected to the first gate of the full-line field effect tube Q7029, one end of the resistor R30134 and the second drain of the full-line field effect tube Q7029 are both connected to the backlight pin module, and the first drain and the second gate of the full-line field effect tube Q7029 are both connected to the display pin through the resistor R30129.

5. The display control circuit according to claim 4, characterized in that: The screen backlight enabling module includes a full-line field effect tube Q7031, a resistor R12314, a resistor R30115, a resistor R30146, a resistor R30107, a resistor R30106, a diode D106, a diode D107, a diode D521, a capacitor C20933, and a capacitor C20934. One end of the resistor R12314 and the cathode of the diode D521 are connected to an external display. The anode of the diode D521, one end of the capacitor C20933, one end of the resistor R30146, and one end of the resistor R301115 are connected to the first gate of the full-line field effect tube Q7031. The cathode of tube D106, the cathode of diode D107 and the other end of resistor R30115 are all connected to the enable pin of the microcontroller, the anode of diode D106 and the anode of diode D107 are all connected to the microcontroller, one end of capacitor C20934 and one end of resistor R30107 are all connected to the second drain of the full-line field effect tube Q7031, one end of resistor R30106 is respectively connected to the first drain and the second gate of the full-line field effect tube Q7031, the other end of resistor R30106 is connected to a DC power, the other end of resistor R30107 is connected to the display pin row, and the second drain of the full-line field effect tube Q7031 is also connected to the backlight pin module.

6. The display control circuit according to claim 5, characterized in that: The screen brightness adjustment module includes a resistor R30142, a resistor R12301, a resistor R12394, a resistor R30135, a resistor R30143, a resistor R30126, a capacitor C20951, a capacitor C20949, and a capacitor C20950. One end of the resistor R30142, one end of the resistor R12304, and one end of the resistor R30143 are all connected to the display pin header, the other end of the resistor R30142 and one end of the resistor R12301 are all connected to the single-chip computer, the other end of the resistor R12301 is grounded through the capacitor C20951, the other end of the resistor R12304 and one end of the resistor R30135 are all connected to the single-chip computer, the other end of the resistor R30135 is grounded through the capacitor C20949, the other end of the resistor R30143 and one end of the resistor R30126 are all connected to the single-chip computer, and the other end of the resistor R30126 is grounded through the capacitor C20950.

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