CN202149400U - LED (light-emitting diode) film and video lamp with adjustable light-emitting angles and luminance - Google Patents

Abstract

The utility model aims at providing an LED (light-emitting diode) film and video lamp with adjustable light-emitting angles and luminance, which is simple in structure, convenient to control, and not obvious in change of color temperatures along with the luminance. In order to achieve the aims, the LED film and video lamp adopts the technical scheme that the LED film and video lamp with the adjustable light-emitting angles and luminance comprises a singlechip connected with a power module; an adjusting potential meter is connected on the singlechip; and the output end of the singlechip is connected with an LED panel by an LED driver. By adopting the technical scheme, the LED film and video lamp with the adjustable light-emitting angles and luminance drives an LED lamp on the LED panel by the LED driver controlled by the singlechip, so that no matter how to adjust the angles or the brightness of the film and video lamp, the color temperature does not change obviously.

Description

Lighting angle and brightness adjustable LED video light

technical field

The utility model relates to the technology of a pump body, in particular to an LED video light with adjustable luminous angle and brightness.

Background technique

Film and television lights refer to a type of lamps and lanterns used for lighting and achieving certain light effects in stage performances and film and television shooting. It helps to express the content of the program, reflect the author's creative intention, set off the artistic atmosphere, and make the audience and the camera get the correct color perception and exposure. Different from other lamps, most of these lamps have the function of changing the beam diffusion angle, light softness and color, and are equipped with special mechanisms such as focusing, diaphragm, and color filter frame. Stage film and television lights are composed of light sources, optical components, mechanical components and electrical components. ① light source. There are many kinds of incandescent lamps, tungsten halogen lamps and metal halide lamps, and now LED lamps are usually used. ② Optical components. According to the shape of the light source illuminant and the requirements for lighting, imaging, and effects, the optical system is composed of reflectors, field mirrors, condensers, and objective lenses. ③Mechanical components. It has the functions of enclosure and light blocking, heat dissipation, heat insulation, etc., and can ensure the stability and reliability of the optical system and perform various functions, including the enlargement and reduction of the beam angle of the light, the focus adjustment of the ordinary objective lens or the variable focus objective lens, and the effect The motor mechanical transmission of the device and so on. ④Electrical components. Including regulated power supply, light source accessory trigger, ballast, rheostat, etc., dimmer and stepless variable speed electrical circuit for controlling the transmission motor of the effector, etc.

Film and television lights are used in studios, studios or on-site scenes. The "audience" is a camera or video camera that can be moved and processed technically. There are many close-ups. In addition to the artistic effect, the lighting also has the effect of making the camera tube or film correctly exposed. , especially for good color reproduction, the color temperature of the light is required to be about 5000K and the color rendering index is above 90 when shooting interior scenes under light, and 5000K and above 80 for exterior scenes shooting under sunlight.

As shown in Figure 1, the traditional dimming circuit uses an analog method to achieve dimming. Its disadvantage is that the range of dimming brightness is relatively small, especially in the field of LED lights. In this way, the color temperature will vary with the change of LED brightness. offset. In this regard, we need to find a new way to adjust the LED video light.

Utility model content

The purpose of the utility model is to provide an LED video light with adjustable luminous angle and brightness, which has a simple structure, is convenient to control, and the color temperature does not change significantly with the brightness.

In order to achieve the stated purpose, the technical solution adopted by the utility model is an LED video light with adjustable luminous angle and brightness, including a single-chip microcomputer connected to a power supply module. panel.

Preferably, at least three rows of LED lights arranged at different angles are arranged on the LED panel. In this way, the effect of dimming can be achieved by switching different LED lights.

Preferably, the emission angles of the LED lamps on the LED panel are 30 degrees and 60 degrees, and the LEDs of the same angle are placed in alternate rows. In this way, the overall irradiation angle of the video light can be adjusted by switching lights at different angles.

Preferably, the power module includes an AC adapter connected to a commercial power supply, and the AC adapter is connected to a voltage stabilizing filter. Such a structure can adjust the voltage to an appropriate value to ensure energy saving and high efficiency.

Preferably, there are two LED drivers, one is connected to the LED lamp with a discharge angle of 30 degrees on the LED panel, and the other is connected to the LED lamp with a discharge angle of 60 degrees on the LED panel. Connecting LED lights in different states through different LED drivers makes the whole device more convenient and reliable to use.

Due to the adoption of the technical solution, the LED video light with adjustable luminous angle and brightness of the utility model drives the LED light on the LED panel through the LED drive controlled by the single-chip microcomputer, so that no matter how the angle or brightness of the video light is adjusted, the change in color temperature is not obvious .

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described:

FIG. 1 is a circuit diagram of a video light adjustment control circuit in the prior art.

Fig. 2 is a block diagram of the LED video light system with adjustable luminous angle and brightness of the utility model.

Fig. 3 is a schematic diagram of the arrangement of LED lights on the LED panel of the LED video light with adjustable light emitting angle and brightness of the utility model.

Detailed ways

As shown in Figure 2, the LED video light with adjustable luminous angle and brightness includes a single-chip microcomputer 2 connected to the power module 1. It is characterized in that: the single-chip microcomputer 2 is connected with an adjustment potentiometer 4, and the output terminal of the single-chip microcomputer 2 is connected through the LED driver 6. LED panel7. The LED panel 7 is provided with at least three rows of LED lamps arranged at different angles. The emission angles of the LED lamps on the LED panel are 30 degrees and 60 degrees, and the LEDs of the same angle are placed in alternate rows. The power module 1 includes an AC adapter 3 connected to the mains, and the AC adapter 3 is connected to a voltage stabilizing filter 5 . There are two LED drivers 6 , one is connected to the LED panel 7 with an LED lamp with a discharge angle of 30 degrees, and the other is connected to the LED panel 7 with an LED lamp with a discharge angle of 60 degrees.

When working, the 220V mains power is converted into 5V DC by the AC adapter 3, and the 5V DC is stabilized by the voltage stabilization filter 5 to form a 5V power supply for the single-chip microcomputer 2 and peripheral components, and the other 5V DC power supply for two groups of LED driver 6 circuits .

The system adopts Samsung 8-bit single-chip microcomputer S3F9488XZZ, and the single-chip microcomputer 2 outputs "LED (30 degrees) control PWM" port and "LED (60 degrees) control PWM" port to control two groups of LED drivers 6 respectively. When the potentiometer 4 is rotated to realize two Adjustment of LED brightness and luminous angle in various angles.

The color temperature adjustment principle of the LED light design on the LED panel 7 is that when the LED light at an angle of 30 degrees is turned on and the LED light at an angle of 60 degrees is not turned on, the light-emitting angle at this time is 30 degrees, and when the LED light is turned on at 60 degrees and the LED light is not turned on at 30 degrees At this time, the luminous angle at this time is 60 degrees; when the 30-degree LED light is at the maximum brightness, the 60-degree LED light gradually increases in brightness from dark to bright, and the luminous angle will increase with the brightness of the 60-degree LED light. Increase, when the 60-degree LED light is increased to the maximum, keep the 60-degree LED light at the maximum at this time, and the 30-degree LED light will gradually reduce the brightness from bright to dark. At this time, the luminous angle increases with the 30-degree LED light. Until the 60-degree LED light is the largest, and the 30-degree LED light is turned off, the luminous angle is at most 60 degrees, thereby realizing the adjustment of the luminous angle from 30 degrees to 60 degrees. The principle of adjusting the brightness is that when the potentiometer is adjusted to a certain brightness position, the maximum brightness of the 30-degree LED light or the 60-degree LED light will not exceed the brightness corresponding to this position. During the adjustment process, the maximum brightness of the 60-degree LED light or the 30-degree LED light will not exceed 1/2 of the brightest time. In this way, no matter how you adjust the angle and brightness, the color temperature will not change significantly.

The above is only a specific embodiment of the utility model, but the structural features of the utility model are not limited thereto, and any changes or modifications made by those skilled in the art within the scope of the utility model are covered by the utility model. In the scope of the new patent.

Claims (5)

1. lighting angle and adjustable brightness LED video display lamp comprise the single-chip microcomputer (2) that connects power module (1), it is characterized in that: be connected with regulator potentiometer (4) on the said single-chip microcomputer (2), single-chip microcomputer (2) output drives (6) through LED and connects LED panel (7).

2. lighting angle as claimed in claim 1 and adjustable brightness LED video display lamp is characterized in that: said LED panel (7) is provided with the LED lamp that at least three rows are provided with by different angles.

3. lighting angle as claimed in claim 2 and adjustable brightness LED video display lamp is characterized in that: the discharging angle that said LED panel (7) is gone up the LED lamp is 30 degree and 60 degree, puts the LED with a kind of angle at a distance from discharging.

4. lighting angle as claimed in claim 1 and adjustable brightness LED video display lamp is characterized in that: said power module (1) comprises the AC adapter (3) that connects civil power, and AC adapter (3) connects pressure stabilization filter (5).

5. lighting angle as claimed in claim 3 and adjustable brightness LED video display lamp; It is characterized in that: it is two that said LED drives (6); It is the LED lamp of 30 degree that a connection LED panel (7) is gone up the discharging angle, and another is connected LED panel (7) and upward discharges the LED lamp that angle is 60 degree.

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