Do you notice some very technological 3D images? In fact, many of these images are projected by holographic projectors. There are many types of them, so let’s learn more about holographic projectors next.
What is a holographic projector
Holographic projector is a display capable of presenting three-dimensional images, the principle of which is to first use the principle of interference to record the light wave information of the object, which is often referred to as the filming process, and then use the principle of diffraction to reproduce the light wave information of the object, which can make the image presented.
Types of holographic projectors
Handheld holographic projector
Handheld holographic projector, designed to be relatively small and exquisite, can be easily held by consumers, for simple operation, and its charging method using a battery or USB charging, which greatly enhances the convenience of carrying around. Therefore, it is more suitable for small parties or personal entertainment activities.
Desktop holographic projector
Desktop holographic projector, as the name suggests, is a projector that can be placed on a table or a flat surface, and its size will be much larger than that of a handheld holographic projector, which can provide greater stability and projection area.
The larger the projection area of a desktop holographic projector, the more detail it can provide to the consumer. Some models also add interactive elements to bring the audience closer, making them more suitable for business presentations, education, and furniture decoration.
Holographic Fan
Holographic Fan is a unique holographic display. It is a combination of rotating LED blades. These LED blades are capable of displaying images and videos to create the illusion of a hologram, resulting in a vivid 3D visualization in mid-air. This type of display has the added advantage that it allows the viewer to see the presentation of the image even in well-lit areas, making it very adaptable for use in places such as retail, events and promotions.
Head-mounted holographic projectors
Head mounted holographic projectors are head wearable. This holographic projector projects a holographic image directly to the user, providing an immersive viewing experience, and is designed to be ergonomically comfortable and sized for long periods of time without discomfort.
This kind of holographic projector is initially used in games, simulation and professional training and other entertainment and gaming fields, and will gradually be applied to the medical and architectural fields.
Large-scale holographic projector
This type of display is designed for large events and installations, and can create holographic displays at the same scale as, or larger than, a real person. These displays can be complex and often require specialized setup and calibration in order to provide consumers with a larger projection area and a clearer, more impactful image for the viewer.
DIY Holographic Projectors
The DIY holographic projector is a very fun and educational project that is not very technical. It requires only a smartphone and a plastic sheet to manufacture and is perfect for learning the basics of optics and holography. This holographic projector is very popular with students and hobbyists.
Differences between holographic projectors and traditional projectors
Image Projection
Traditional projectors are only capable of displaying images on a curtain or flat surface, and most of the content they show is 2D images. The holographic projector breaks this limitation, it can project a flat image in the air without the help of a curtain, or a three-dimensional stereoscopic effect.
Viewing Angle
The viewing experience of a holographic projector is different from that of a traditional projector from different viewpoints. When you want to get the best viewing experience on a traditional projector, you have to stand right in front of the screen it is projecting on.
A holographic projector, on the other hand, is not so fixed; it is able to show the viewer the object in all 360 degrees, and the viewer can view the image screen of the object presented from different viewpoints.
Technology Used
Holographic projectors are able to use lasers, mirrors, and light interference to create a three-dimensional image. Traditional projectors can only be connected to a computer or other display with a video signal through different interfaces, thus using light through magnifying mirrors and lenses to present the image.
Hardware
In order to be able to present clear, rich three-dimensional stereoscopic images, the holographic projector’s hardware equipment will be higher than the traditional projector’s hardware equipment. To give you a better understanding, let’s take an example:
Both holographic projector and traditional projector need to use the light source, in the light source is the most expensive, but also the best light source is named laser light source, this light source is mostly used in holographic projector. The light source of the traditional projector is the cheapest and most inexpensive traditional incandescent bulb light source.
Lifespan
Because holographic projectors use high-end equipment, i.e., laser light source, etc., its overall service life can be as high as 30,000 hours. While the traditional projector does not require high hardware equipment, the overall service life is very low, only 3,000 hours, 10 times lower than the holographic projector service life.
Price
The price of a holographic projector will be much more expensive than the traditional projector. There are three reasons why holographic projectors are expensive:
The first point is that the materials needed are more expensive, it is only equipped with high-end equipment materials to make the picture more clear, while the traditional projector is not needed.
The second point, the manufacturing cost is higher, its manufacturing process is more complex, requires a professional team and advanced technology to be able to manufacture, while the traditional projector process is simple and mature, there is a complete production process, the manufacturing cost is lower.
The third point is that it needs specialized installers to install it, and the labor cost is higher, while the traditional projector doesn’t need specialized installers and can be installed well by itself.
Space requirement
We will see in the classroom and office conference room, the traditional projector needs to leave a relatively large projection space, that is, between the projector and the curtain to leave a space without any cover. A holographic projector does not require a curtain, so it still takes up much less space overall than a traditional projector.
Application
In terms of application, traditional projectors are mainly used in classrooms, office meeting rooms, movie theaters and other fixed areas. The holographic projector is mainly used in advertising, art performance, song and dance interaction and other innovative fields.
Difference between holographic projector and LED display screen
Image quality
The resolution of holographic projector is only below 4K, and its brightness ranges from 1000~3000cd/m², which can provide clear and vivid images to the audience, but compared with LED display, it will be blurred and hard.
The resolution of LED display is determined by the pixel density, the smaller the pixel density, the higher the resolution, so the resolution of LED display can reach 4K and above, and its brightness ranges from 4000~5500 cd/m², which can provide viewers with more detailed and realistic images.
Size
The size of the holographic projector is basically fixed, it can’t change various sizes at will, and can only recommend the size that can be manufactured according to the customer’s demand.
LED display has advantages in this regard, it is made of several LED modules for seamless splicing, according to the different environments and customer needs, with different types of modules to be spliced into the desired length and width, with the flexibility of size changes.
Portability
Holographic projectors require more structural components and cannot be designed for easy installation and disassembly. However, LED displays can be changed into a style that is easy to carry, install and dismantle through the process of die-casting aluminum, which makes it more convenient than holographic projector.
Service life
The overall service life of LED displays can reach 100,000 hours. Compared with the holographic projector, it can be found that the service life of the LED display will be 70,000 hours more than that of the holographic projector, so the service life of the LED display will be longer than that of the holographic projector.
Usage
In terms of usage, LED displays are very wide, from small advertising in the daily field to large video displays in the professional field. While most of the holographic projectors can only be used in classrooms, stages and other educational and entertainment areas.
Price
Compared with the holographic projector, the price of LED display will be more expensive, the reason is mainly for the following three points:
The first point is the higher cost of materials. When you need a large format LED display, you need to use a lot of LED modules.
The second point, if you want a clearer image, then you need to add a lot of LED beads in the LED module, the process will be more complex, the manufacturing cost is higher.
The third point, high cost of manpower and time. After the LED display is finished manufacturing, 3 days will be used to carry out the aging test on the LED display, and the purpose of its aging test is to screen those parts that are not too stable or damaged, and then carry out a better, to ensure that its quality can be better.
How to choose between traditional projector, holographic projector and LED display?
Reading through this article, you can find that in terms of performance and display effect, LED display is superior to traditional projector and holographic projector, followed by holographic projector is superior to traditional projector.
Therefore, when you have enough budget, please choose an LED display, I believe it will bring you an immersive experience. If you have a slightly tighter budget and want to have a three-dimensional effect, then the holographic projector will be your choice. If your budget is very tight, you can choose a traditional projector to transition.
