1、 LED projection lamp LED projection lamp is also call […]
1、 LED projection lamp
LED projection lamp is also called spotlight, projection lamp, spotlight and so on. It is mainly used for architectural decoration lighting and commercial space lighting. Its decorative components are heavy, and its appearance has round and square shapes. Generally, heat dissipation should be considered. Therefore, its shape is different from traditional projection lamp.
Classification of LED projection lamp:
1. Rotation and symmetry
The lamp adopts rotationally symmetric reflector, and the symmetry axis of light source with rotational symmetrical light distribution is installed along the axis of reflector. The isointensity curve of this kind of lamp is concentric. When this kind of projection lamp is illuminated by a single lamp, an oval spot is obtained on the illuminated surface, and the illumination is uneven; however, when multiple lamps are illuminated, the light spots overlap each other, which can produce satisfactory lighting effect. For example, in the stadium, hundreds of rotating symmetrical projection lamps are commonly used and installed on the tower around the stadium to obtain high illumination and high uniformity lighting effect.
2. Two symmetrical planes
The equal intensity curve of this kind of projection lamp has two symmetrical planes. Most lamps are symmetrical cylindrical reflectors, and the linear light source is installed along the cylindrical axis.
3, a row of symmetric planes
There is only one symmetrical plane in the isointensity curve of lamps. Lamps are made of asymmetric cylindrical reflectors or symmetrical cylindrical reflectors plus grid plates limiting light. The most typical is the sharp cut-off block retraction light distribution. This kind of light intensity distribution single lamp can obtain a more satisfactory illumination distribution.
4. Asymmetric shape
There is no symmetry plane in the isointensity curve of this kind of lamps. It mainly adopts the mixed light lamps with different kinds of light sources with great difference in light intensity distribution and special lamps designed according to the specific lighting requirements of the use place.
Characteristics of LED projection lamp:
At present, the commonly used LED projectors in the market are basically 1W high-power LEDs (each LED element will be equipped with a high luminous efficiency lens made of PMMA, and its main function is to distribute the light emitted by LED, that is, secondary optics). A few companies choose 3W or even higher power LEDs because of their good heat dissipation technology. It is suitable for large occasions and buildings.
What else do you need to pay attention to?
1. High purity aluminum reflector plate, the most accurate beam, the best reflection effect.
2. Symmetrical narrow angle, wide angle and asymmetric light distribution system.
3. Rear open type replacement bulb, easy maintenance.
4. All lamps are equipped with scale plate to adjust the illumination angle.
Through the control of the built-in microchip, the LED projection lamp can be used without controller in small engineering applications, which can achieve dynamic effects such as gradual change, jump change, color flicker, random flicker, gradual change alternation, etc. it can also realize chasing, scanning and other effects through the control of DMX. At present, its main application places are as follows: single building, external wall lighting of historical buildings, internal and external lighting of buildings, indoor local lighting, green landscape lighting, billboard lighting, medical culture and other special facilities lighting, atmosphere lighting of bars, dance halls and other entertainment places.
2、 Led floodlight
Led floodlight is a kind of point light source which can irradiate evenly in all directions. Its illumination range can be adjusted arbitrarily, and it is shown as a regular octahedron in the scene.
Floodlight is one of the most widely used light sources in renderings. Multiple floodlights can be used to coordinate in the scene to produce better effects. It is from a specific point to all directions evenly illuminate objects, it is best to use it to analogy light bulbs and candles. Omni lights can be placed anywhere in the scene.
For example, it can be placed outside the range of a camera or inside an object. It is common to use many different colors of floodlights at long distances in a scene. These floodlights can project shadows and blend them into the model. For example, it is easy to place the floodlight near the surface of the object to produce the effect of floodlight.
It should be noted that the floodlights can not be built too much, otherwise the effect picture will appear dull and rigid. Therefore, we should pay more attention to the influence of lighting parameters and layout on the light sense of the whole rendering scene in the production of the effect drawing, accumulate more experience and master the matching skills of lighting.
Characteristics of floodlights:
Under low current, the temperature rise of LED floodlight is not obvious. If the ambient temperature is high, the main wavelength of the LED floodlight will be red shifted, the brightness will be decreased, and the uniformity and consistency of the LED floodlight will be poor. Especially, the temperature rise of dot matrix and large display screen has more significant influence on the reliability and stability of LED floodlights. So the heat dissipation design is very important.
Floodlight is from a specific point to all directions of uniform light objects, it is best to use it to analogy light bulbs and candles. Omni lights can be placed anywhere in the scene. For example, it can be placed outside the range of a camera or inside an object. It is common to use many different colors of floodlights at long distances in a scene.
These floodlights can project shadows and blend them into the model. For example, it is easy to place the floodlight near the surface of the object to produce the effect of floodlight.
3、 The difference between LED projection lamp and floodlight
The difference between floodlights and floodlights is not only reflected in the lighting visual effect, but also in the use of floodlights and projectors.
The difference between floodlights and projection lights is that floodlights can not be built too much, which will appear dull and rigid in the visual effect. In the production, more attention should be paid to the lighting parameters and the influence on the light perception of the whole rendering scene.
The items needing attention of the projection lamp are: the most accurate beam, high purity aluminum reflector, the best reflection effect, symmetrical narrow angle, wide angle and asymmetric light distribution system. The projection lamp lamps are equipped with scale plate to facilitate the adjustment of illumination angle.
The difference between floodlight and projection lamp is also reflected in the range of illumination between them.
Projection lamp, also known as projection lamp, spotlight, spotlight, etc., is mainly used for architectural decoration lighting and commercial space lighting. Its decorative components are heavy, and there are many styles in the modeling design.
The floodlight is a kind of point light source which can be evenly illuminated to all places in all directions. Its illumination range can be adjusted arbitrarily. The standard floodlight can be used to illuminate the whole scene.