Adjustable LED lamp for square cabin

Abstract

The utility model discloses an adjustable LED lamp for a square cabin, which relates to the field of illumination and comprises a lithium battery and an LED lamp, the lithium battery is electrically connected with the LED lamp, a current-limiting resistor, a brightness adjusting switch and a capacitor are additionally arranged between the lithium battery and the LED lamp, the current-limiting resistor and the capacitor are respectively connected with the positive electrode and the negative electrode of the lithium battery, and the brightness adjusting switch is electrically connected with the lithium battery. The brightness adjusting switch is arranged between the current-limiting resistor and the capacitor, the capacitor and the LED lamp are connected with an MOS tube, and the switch is turned off. According to the utility model, the current-limiting resistor, the brightness adjusting switch, the MOS tube and the capacitor are additionally arranged between the lithium battery and the LED lamp, the current-limiting resistor is utilized to charge and boost the capacitor, so that the voltage of the grid electrode of the MOS tube is increased, the LED lamp is lightened, the switch is turned off to disconnect the capacitor and the MOS tube, the capacitor is discharged, the voltage of the grid electrode of the MOS tube is reduced, and the LED lamp is darkened, so that the brightness of the LED lamp is adjustable; therefore, adjustment is carried out according to the required brightness, and the practicability of the lighting device is greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of lighting, in particular to an adjustable LED lamp for a shelter. Background Art

[0002] The medical cabin is an environment used for medical examinations and medical treatment operations, equipped with relevant medical equipment and professional nurses and doctors.

[0003] Lighting devices are one of the indispensable equipment in medical cabins. Existing lighting devices in medical cabins mostly use incandescent lamps, LED lamps, fluorescent lamps and other lamps, but they do not have light adjustment functions and cannot be adjusted according to the required brightness, which has poor practicality. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides an adjustable LED lamp for a shelter to solve the problems existing in the above-mentioned background technology.

[0005] The utility model provides the following technical solution: an adjustable LED lamp for a square cabin, comprising a lithium battery and an LED lamp, wherein the lithium battery and the LED lamp are electrically connected, and a current limiting resistor, a brightness adjustment switch, and a capacitor are additionally provided between the lithium battery and the LED lamp, wherein the current limiting resistor and the capacitor are respectively connected to the positive and negative poles of the lithium battery, and the brightness adjustment switch is arranged between the current limiting resistor and the capacitor, and the capacitor and the LED lamp are connected via a MOS tube and an off switch.

[0006] Preferably, the positive electrode of the lithium battery is connected to the current limiting resistor, the negative electrode of the lithium battery is connected to the capacitor, and the current limiting resistor and the capacitor are connected through a brightness adjustment switch.

[0007] Preferably, the MOS tube is arranged in the circuit between the capacitor and the brightness adjustment switch, and the shutoff switch is arranged in the circuit between the MOS tube and the capacitor.

[0008] Preferably, the lithium battery uses 24V.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] The utility model adds a current limiting resistor, a brightness adjustment switch, a MOS tube, and a capacitor between the lithium battery and the LED lamp. The current limiting resistor is used to charge the capacitor and boost the voltage, so that the gate voltage of the MOS tube increases and the LED lamp becomes brighter. The off switch is used to disconnect the capacitor and the MOS tube, so that the capacitor is discharged, the gate voltage of the MOS tube is reduced, and the LED lamp becomes dimmer. The brightness of the LED lamp can be adjusted, so that it can be adjusted according to the required brightness, which greatly improves the practicality of the lighting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the LED lamp connection of the present utility model.

[0012] The accompanying drawings are marked as follows: 1. lithium battery; 2. current limiting resistor; 3. LED lamp; 4. MOS tube; 5. brightness adjustment switch; 6. off switch; 7. capacitor. DETAILED DESCRIPTION

[0013] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0014] The utility model provides an adjustable LED lamp for a shelter, such as Figure 1 As shown, it includes a lithium battery 1 and an LED lamp 3, which are electrically connected to each other, and a current limiting resistor 2, a brightness adjustment switch 5, and a capacitor 7 are additionally provided between the lithium battery 1 and the LED lamp 3, wherein the current limiting resistor 2 and the capacitor 7 are respectively connected to the positive and negative poles of the lithium battery 1, and the brightness adjustment switch 5 is arranged between the current limiting resistor 2 and the capacitor 7, and the capacitor 7 and the LED lamp 3 are connected via a MOS tube 4 and a shut-off switch 6.

[0015] A current limiting resistor 2, a brightness adjustment switch 5, a MOS tube 4, and a capacitor 7 are added between the lithium battery and the LED lamp. The current limiting resistor 2 is used to charge and boost the capacitor 7, thereby increasing the gate voltage of the MOS tube and brightening the LED lamp 3. The off switch 6 is used to disconnect the capacitor 7 from the MOS tube 4, thereby discharging the capacitor 7, reducing the gate voltage of the MOS tube, and dimming the LED lamp 3. This makes the brightness of the LED lamp 3 adjustable, thereby adjusting it according to the required brightness, greatly improving the practicality of the lighting device.

[0016] Furthermore, the positive electrode of the lithium battery 1 is connected to the current limiting resistor 2 , the negative electrode of the lithium battery 1 is connected to the capacitor 7 , and the current limiting resistor 2 and the capacitor 7 are connected via the brightness adjustment switch 5 .

[0017] Furthermore, the MOS transistor 4 is provided in the circuit between the capacitor 7 and the brightness adjustment switch 5 , and the off switch is provided in the circuit between the MOS transistor 4 and the capacitor 7 .

[0018] Furthermore, the lithium battery 1 adopts 24V.

[0019] The working principle of this utility model:

[0020] When the brightness adjustment switch 5 is pressed, the current will charge the capacitor 7 through the current limiting resistor 2. As the voltage across the capacitor 7 increases, the gate voltage of the MOS tube also increases. When the gate voltage is higher than the pinch-off voltage of the MOS tube 4, the MOS tube 4 starts to conduct and the LED lamp 3 becomes brighter.

[0021] As the gate voltage of the MOS tube increases, the current between the two ends of the MOS tube increases, and the LED gradually becomes brighter.

[0022] When the off switch 6 is pressed, the capacitor 7 starts to discharge, the voltage across the capacitor starts to decrease, and the gate voltage of the MOS tube also decreases. When the gate voltage is lower than the pinch-off voltage of the MOS tube, the MOS tube 4 is turned off and the LED light 3 is turned off.

[0023] Several points should be explained: First, it should be noted that in the description of this application, unless otherwise specified or limited, the terms "mounted", "connected", and "connected" should be understood in a broad sense, and may refer to mechanical or electrical connections, internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change;

[0024] The above description is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the content disclosed in the present invention should be included in the protection scope recorded in the claims.

Claims

1. An adjustable LED lamp for a shelter, comprising a lithium battery (1) and an LED lamp (3), characterized in that: The lithium battery (1) and the LED lamp (3) are electrically connected, and a current limiting resistor (2), a brightness adjustment switch (5), and a capacitor (7) are additionally provided between the lithium battery (1) and the LED lamp (3), wherein the current limiting resistor (2) and the capacitor (7) are respectively connected to the positive and negative electrodes of the lithium battery (1), and the brightness adjustment switch (5) is provided between the current limiting resistor (2) and the capacitor (7), and the capacitor (7) and the LED lamp (3) are connected via a MOS tube (4) and an off switch (6).

2. The adjustable LED lamp (3) for a shelter according to claim 1, characterized in that: The positive electrode of the lithium battery (1) is connected to the current-limiting resistor (2), the negative electrode of the lithium battery (1) is connected to the capacitor (7), and the current-limiting resistor (2) and the capacitor (7) are connected via a brightness adjustment switch (5).

3. The adjustable LED lamp (3) for a shelter according to claim 1, characterized in that: The MOS tube (4) is arranged in a circuit between the capacitor (7) and the brightness adjustment switch (5), and the shutoff switch is arranged in a circuit between the MOS tube (4) and the capacitor (7).

4. The adjustable LED lamp (3) for a shelter according to claim 1, characterized in that: The lithium battery (1) adopts 24V.

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