Projector
11-21
Classification according to application environment
Home cinema type: its characteristics are that the brightness is about 2000 lumens (with the development of projection, this number is increasing continuously, and the contrast is high), the aspect ratio of the projection picture is mostly 16:9, and various video ports are complete, which are suitable for playing movies and high-definition television, and for family users.
Portable business projectors: Generally, projectors weighing less than 2 kg are defined as business portable projectors, which are as heavy as thin and light laptops. The business portable projector has the advantages of small size, light weight and strong mobility. It is a substitute for the traditional slide projector and large and medium-sized projectors. The combination of thin and light notebook computers and business portable projectors is the preferred combination for mobile business users in mobile business presentations.
Educational conference projector: generally positioned for school and enterprise applications, it adopts mainstream resolution, brightness of about 2000-3000 lumens, moderate weight, good heat dissipation and dust prevention, suitable for installation and short distance movement, rich functional interfaces, easy maintenance, relatively high performance price ratio, and is suitable for mass purchase and popularization.
Mainstream engineering projectors: compared with mainstream ordinary projectors, engineering projectors have larger projection area, longer distance, high brightness, and generally support multi bulb mode, which can better cope with large and varied installation environments, and are applicable to education, media, government and other fields.
Professional theater projectors: These projectors pay more attention to stability, emphasize low failure rate, and have strong thermal performance, network functions, ease of use and other aspects of projectors. Of course, in order to adapt to various professional applications, the main feature of the projector is its high brightness, which can generally reach more than 5000 lumens, and the higher one can exceed 10000 lumens. Due to its large size and heavy weight, it is usually used for special purposes, such as theaters, museums, halls, public areas, as well as for traffic monitoring, public security command centers, fire control and air traffic control centers.
Measuring projector: This type of projector is different from the above types of projectors. In the early days, it was called contour projector. With the popularity of grating ruler, projectors were installed with high-precision grating ruler, which is also called measuring projector (or projector, for example, CPJ-3015 produced by Gaocheng Company, a famous measuring projector in China). To distinguish it from traditional projectors, this type of projector is called measuring projector. Its main function is to form an enlarged projector through the transmission of light, and then use standard film or grating ruler to determine the size of the product. Due to the development of industrialization, this measuring projector has become one of the most commonly used measuring instruments in the manufacturing industry. There are vertical projectors and horizontal projectors for regular projection. According to different comparison standards, it can be divided into contour projector and digital projector.
Note: The projection quality of the projector is not only related to the brightness of the projection bulb, but also to the impact of the projection environment. The light intensity of the projector working environment will directly affect the projection effect. Therefore, before using the projector, you must first arrange the working environment of the projector to make the projection bulb work in a dark light environment as much as possible. The bright ambient light will make the brightness effect of the projection bulb worse, which makes it difficult for students to watch. In order to make the projector have a better projection effect, we might as well install dark opaque curtains in the room to block the outdoor light. The room walls are made of materials that are not reflective. These details will make the projector have a better projection effect when the brightness of the projection bulb is the same.
When the projector is switched from the power on state to the power off state, the cooling time should be at least 5 minutes apart. Because the power supply of the projector adopts the switching power supply method to reduce the voltage, stabilize the voltage and stabilize the power of the mains. During frequent startup and shutdown switching operations, the high-power switch tubes and transformers used in the projector power supply work at a higher frequency. The switch tubes will generate considerable power consumption during frequent switching, and these lost power will be transferred into heat, So as to increase the temperature inside the projector; In addition, the heat emitted by the bulb itself is gathered in the narrow space inside the projector, and the sudden change of temperature can easily cause the projection bulb to explode; If the projector power supply is switched on and off frequently, it will also have a great current impact on the projection bulb, which is easy to cause damage to the projection bulb; It may also damage components in the circuit.
Chengdu Guohao Technology Co., Ltd. was established in 2015. It is a high-tech enterprise founded by former executives of Fortune 500 companies in China. The company focuses on the R&D and marketing of audio and video products for office teaching. The core R&D team has more than 10 years of experience in audio and video product development. The company has a number of software copyrights and is applying for an invention patent (published, publication number: CN112312002A).
The company's current products are concentrated in the fields of education and intelligent office, and it has successively launched a variety of office projectors and video booth products. In particular, the company's recently launched series of teaching video booths have the advantages of high-definition display, lossless magnification, no smear and no delay, synchronous micro-class recording, multi-platform online class live broadcast, etc., which are favored and widely used by the majority of calligraphy and painting training institutions. It has become a unified configuration teaching equipment for many calligraphy training schools and affiliated branch schools.
The company has always adhered to the business development concept of "sincere and trustworthy, professional and diligent", providing perfect, high-quality and convenient office audio-visual products and services for corporate customers and individual customers in China and even the Asia-Pacific region, and striving to be the industry leader in audio-visual products for audio-visual education.
Jun Mei
2488427092@qq.com
plum.jun@gmail.com