Video image color sampling circuit based on VGA (Video Graphics Array) signal

Abstract

The utility model discloses a video image color sampling circuit based on a VGA (Video Graphics Array) signal. The video image color sampling circuit comprises an HDMI (High Definition Multimedia Interface) signal interface circuit and a signal conversion circuit, the HDMI signal interface circuit comprises a connector CN1; the signal conversion circuit comprises a chip U1; the pin 1 of the connector CN1 is electrically connected with the pin 11 of the chip U1, the pin 3 of the connector CN1 is electrically connected with the pin 10 of the chip U1, the pin 4 of the connector CN1 is electrically connected with the pin 8 of the chip U1, the pin 6 of the connector CN1 is electrically connected with the pin 7 of the chip U1, and the pin 7 of the connector CN1 is electrically connected with the pin 5 of the chip U1. The utility model relates to the technical field of sampling circuits, in particular to a video image color sampling circuit based on VGA (Video Graphics Array) signals. The technical problem to be solved by the utility model is to provide the video image color sampling circuit based on the VGA signal, which is favorable for reducing the cost and reducing the wiring difficulty.

Description

Technical Field

[0001] The utility model relates to the technical field of sampling circuits, in particular to a sampling circuit for video screen image colors based on VGA signals. Background Art

[0002] LED lamps, or light-emitting diode lamps, are lighting tools that use light-emitting diodes as light sources. LED lamps have extremely high luminous efficiency and can significantly reduce energy consumption compared to traditional incandescent lamps and fluorescent lamps. The service life of LED lamps can usually reach more than tens of thousands of hours, far exceeding traditional lighting products. LED lamps do not contain harmful substances such as mercury, and waste can be recycled, which is beneficial to environmental protection. LED lamps have low operating voltage and low heat generation, and are not prone to fire and other safety accidents. LED lamps can emit light in a variety of colors with high color purity, suitable for various decoration and lighting needs.

[0003] As LED lamps develop faster and faster, their application scenarios are increasing, but they still cannot meet people's life needs; for example, the effects of stage lights or light and audio synchronization in KTV are basically achieved using DMX512 lighting control systems, which are costly, difficult to wire, and have high subsequent maintenance costs. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a sampling circuit for screen image colors based on VGA signals, which is beneficial to reducing costs and wiring difficulty.

[0005] The utility model adopts the following technical solutions to achieve the purpose of the utility model:

[0006] A sampling circuit for video image color based on a VGA signal, characterized in that it comprises: an HDMI signal interface circuit and a signal conversion circuit; the HDMI signal interface circuit comprises a connector CN1; the signal conversion circuit comprises a chip U1; pin 1 of the connector CN1 is electrically connected to pin 11 of the chip U1, pin 3 of the connector CN1 is electrically connected to pin 10 of the chip U1, pin 4 of the connector CN1 is electrically connected to pin 8 of the chip U1, pin 6 of the connector CN1 is electrically connected to pin 7 of the chip U1, pin 7 of the connector CN1 is electrically connected to pin 5 of the chip U1, pin 9 of the connector CN1 is electrically connected to pin 4 of the chip U1, pin 10 of the connector CN1 is electrically connected to pin 2 of the chip U1, and pin 12 of the connector CN1 is electrically connected to pin 1 of the chip U1; pin 15 of the connector CN1 is electrically connected to pin 46 of the chip U1, and pin 16 of the connector CN1 is electrically connected to pin 45 of the chip U1.

[0007] As a further limitation of the present technical solution, it also includes a signal output interface circuit, which includes a connector CON1, pin 1 of the connector CON1 is electrically connected to pin 39 of the chip U1, pin 2 of the connector CON1 is electrically connected to pin 38 of the chip U1, pin 3 of the connector CON1 is electrically connected to pin 37 of the chip U1, pin 12 of the connector CON1 is electrically connected to pin 42 of the chip U1, pin 13 of the connector CON1 is electrically connected to pin 43 of the chip U1, pin 14 of the connector CON1 is electrically connected to pin 30 of the chip U1, and pin 15 of the connector CON1 is electrically connected to pin 31 of the chip U1.

[0008] As a further limitation of the technical solution, it also includes a signal processing circuit and a signal filtering circuit, the signal processing circuit includes a chip U3, the signal filtering circuit includes capacitors C11, C12, C13, C14, C15 and C16, pin 2 of the chip U3 is electrically connected to resistor R2, one end of the capacitor C12 and the capacitor C15, pin 3 of the chip U3 is electrically connected to resistor R3, one end of the capacitor C13 and the capacitor C116, pin 14 of the chip U3 is electrically connected to resistor R1, one end of the capacitor C11 and the capacitor C14, the other end of the resistor R1 is electrically connected to pin 1 of the connector CON1 and pin 39 of the chip U1, the other end of the resistor R2 is electrically connected to pin 2 of the connector CON1 and pin 38 of the chip U1, and the other end of the resistor R3 is electrically connected to pin 3 of the connector CON1 and pin 37 of the chip U1.

[0009] As a further limitation of the present technical solution, the pin 9 of the chip U3 is electrically connected to a power source and one end of a capacitor C25, and the other end of the capacitor C25 is grounded.

[0010] As a further limitation of the present technical solution, the pin 8 of the chip U3 is electrically connected to one end of the capacitor C26, and the other end of the capacitor C26 is grounded.

[0011] As a further limitation of the present technical solution, the pin 11 of the chip U3 is electrically connected to one end of the resistor R12, and the other end of the resistor R12 is grounded.

[0012] As a further limitation of the present technical solution, the pin 18 of the connector CN1 is electrically connected to one end of the resistor R4 , and the other end of the resistor R4 is electrically connected to the pin 26 of the chip U1 .

[0013] Compared with the related art, the video screen image color sampling circuit based on VGA signal provided by the utility model has the following beneficial effects:

[0014] (1) This circuit reduces costs, reduces wiring difficulty, and has low subsequent maintenance costs;

[0015] (2) The HDMI signal interface circuit of this circuit converts the video image color signal from the TV or computer into a VGA signal through chip 1, and then collects and samples the VGA signal and synchronizes the HDMI signal through the chip, and outputs a PWM signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the HDMI signal interface circuit of the utility model;

[0017] Figure 2 It is the signal conversion circuit of the utility model;

[0018] Figure 3 It is the signal output interface circuit of the utility model;

[0019] Figure 4 The signal processing circuit of the utility model;

[0020] Figure 5 The utility model is a signal filtering circuit. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] A sampling circuit for video image color based on a VGA signal, comprising: an HDMI signal interface circuit and a signal conversion circuit; the HDMI signal interface circuit comprises a connector CN1; the signal conversion circuit comprises a chip U1; pin 1 of the connector CN1 is electrically connected to pin 11 of the chip U1, pin 3 of the connector CN1 is electrically connected to pin 10 of the chip U1, pin 4 of the connector CN1 is electrically connected to pin 8 of the chip U1, pin 6 of the connector CN1 is electrically connected to pin 7 of the chip U1, pin 7 of the connector CN1 is electrically connected to pin 5 of the chip U1, pin 9 of the connector CN1 is electrically connected to pin 4 of the chip U1, pin 10 of the connector CN1 is electrically connected to pin 2 of the chip U1, and pin 12 of the connector CN1 is electrically connected to pin 1 of the chip U1; pin 15 of the connector CN1 is electrically connected to pin 46 of the chip U1, and pin 16 of the connector CN1 is electrically connected to pin 45 of the chip U1.

[0023] It also includes a signal output interface circuit, which includes a connector CON1, wherein pin 1 of the connector CON1 is electrically connected to pin 39 of the chip U1, pin 2 of the connector CON1 is electrically connected to pin 38 of the chip U1, pin 3 of the connector CON1 is electrically connected to pin 37 of the chip U1, pin 12 of the connector CON1 is electrically connected to pin 42 of the chip U1, pin 13 of the connector CON1 is electrically connected to pin 43 of the chip U1, pin 14 of the connector CON1 is electrically connected to pin 30 of the chip U1, and pin 15 of the connector CON1 is electrically connected to pin 31 of the chip U1.

[0024] It also includes a signal processing circuit and a signal filtering circuit, the signal processing circuit includes a chip U3, the signal filtering circuit includes capacitors C11, C12, C13, C14, C15 and C16, pin 2 of the chip U3 is electrically connected to resistor R2, capacitor C12 and one end of the capacitor C15, pin 3 of the chip U3 is electrically connected to resistor R3, capacitor C13 and one end of the capacitor C116, pin 14 of the chip U3 is electrically connected to resistor R1, capacitor C11 and one end of the capacitor C14, the other end of the resistor R1 is electrically connected to pin 1 of the connector CON1 and pin 39 of the chip U1, the other end of the resistor R2 is electrically connected to pin 2 of the connector CON1 and pin 38 of the chip U1, and the other end of the resistor R3 is electrically connected to pin 3 of the connector CON1 and pin 37 of the chip U1.

[0025] Pin 9 of the chip U3 is electrically connected to a power source and one end of a capacitor C25 , and the other end of the capacitor C25 is grounded.

[0026] The pin 8 of the chip U3 is electrically connected to one end of the capacitor C26, and the other end of the capacitor C26 is grounded.

[0027] The pin 11 of the chip U3 is electrically connected to one end of a resistor R12 , and the other end of the resistor R12 is grounded.

[0028] The pin 18 of the connector CN1 is electrically connected to one end of the resistor R4 , and the other end of the resistor R4 is electrically connected to the pin 26 of the chip U1 .

[0029] The model of the chip U1 is AG6202.

[0030] The model of the chip U3 is STM8S003F3P6.

[0031] The working principle of a video screen image color sampling circuit based on a VGA signal provided by the utility model is as follows:

[0032] The HDMI signal interface circuit converts the video image color signal from the TV or computer into a VGA signal through the signal conversion circuit chip U1, and transmits it to the signal output interface circuit. The signal output interface circuit sends the VGA signal to the signal processing circuit. The chip U3 of the signal processing circuit collects, samples and processes the VGA signal to synchronize it with the HDMI signal and outputs a PWM signal.

[0033] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A video image color sampling circuit based on a VGA signal, characterized in that: include: HDMI signal interface circuit and signal conversion circuit; The HDMI signal interface circuit comprises a connector CN1; The signal conversion circuit includes a chip U1; Pin 1 of the connector CN1 is electrically connected to pin 11 of the chip U1, pin 3 of the connector CN1 is electrically connected to pin 10 of the chip U1, pin 4 of the connector CN1 is electrically connected to pin 8 of the chip U1, pin 6 of the connector CN1 is electrically connected to pin 7 of the chip U1, pin 7 of the connector CN1 is electrically connected to pin 5 of the chip U1, pin 9 of the connector CN1 is electrically connected to pin 4 of the chip U1, pin 10 of the connector CN1 is electrically connected to pin 2 of the chip U1, and pin 12 of the connector CN1 is electrically connected to pin 1 of the chip U1; The pin 15 of the connector CN1 is electrically connected to the pin 46 of the chip U1 , and the pin 16 of the connector CN1 is electrically connected to the pin 45 of the chip U1 .

2. The video screen image color sampling circuit based on the VGA signal according to claim 1, characterized in that: It also includes a signal output interface circuit, which includes a connector CON1, wherein pin 1 of the connector CON1 is electrically connected to pin 39 of the chip U1, pin 2 of the connector CON1 is electrically connected to pin 38 of the chip U1, pin 3 of the connector CON1 is electrically connected to pin 37 of the chip U1, pin 12 of the connector CON1 is electrically connected to pin 42 of the chip U1, pin 13 of the connector CON1 is electrically connected to pin 43 of the chip U1, pin 14 of the connector CON1 is electrically connected to pin 30 of the chip U1, and pin 15 of the connector CON1 is electrically connected to pin 31 of the chip U1.

3. The video screen image color sampling circuit based on the VGA signal according to claim 2, characterized in that: It also includes a signal processing circuit and a signal filtering circuit, the signal processing circuit includes a chip U3, the signal filtering circuit includes capacitors C11, C12, C13, C14, C15 and C16, pin 2 of the chip U3 is electrically connected to resistor R2, capacitor C12 and one end of the capacitor C15, pin 3 of the chip U3 is electrically connected to resistor R3, capacitor C13 and one end of the capacitor C116, pin 14 of the chip U3 is electrically connected to resistor R1, capacitor C11 and one end of the capacitor C14, the other end of the resistor R1 is electrically connected to pin 1 of the connector CON1 and pin 39 of the chip U1, the other end of the resistor R2 is electrically connected to pin 2 of the connector CON1 and pin 38 of the chip U1, and the other end of the resistor R3 is electrically connected to pin 3 of the connector CON1 and pin 37 of the chip U1.

4. The video screen image color sampling circuit based on the VGA signal according to claim 3, characterized in that: Pin 9 of the chip U3 is electrically connected to a power source and one end of a capacitor C25 , and the other end of the capacitor C25 is grounded.

5. The video screen image color sampling circuit based on VGA signal according to claim 3, characterized in that: The pin 8 of the chip U3 is electrically connected to one end of the capacitor C26, and the other end of the capacitor C26 is grounded.

6. The video screen image color sampling circuit based on VGA signal according to claim 3, characterized in that: The pin 11 of the chip U3 is electrically connected to one end of a resistor R12 , and the other end of the resistor R12 is grounded.

7. The video image color sampling circuit based on VGA signal according to claim 1, characterized in that: The pin 18 of the connector CN1 is electrically connected to one end of the resistor R4 , and the other end of the resistor R4 is electrically connected to the pin 26 of the chip U1 .

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