introduction
In recent years, LED lighting technology has been rapidly developed, and it has been widely used in many fields such as urban landscape lighting. It is also common to use LED effect lighting fixtures in TV variety shows and square performances, such as LED dyeing lamps, LED package lights, etc. . However, LED lamps used for character lighting are in the initial stage due to the light effect and color rendering of the light source. With the continuous improvement of LED light efficiency, the color rendering index can reach 85 or more. LED lighting fixtures are already available for use. Basic conditions for TV lighting.
In order to provide a scientific basis for the full application of LED lighting fixtures in the new studio of CCTV, and to guide the development of LED lighting fixtures in China, CCTV officially established projects in December 2009, organized experts and scholars from all walks of life to carry out "LED lighting in TV". Studio Applied Research" work. The research work was completed in more than half a year with the great assistance and comprehensive support of Beijing Xingguang Film and Television Technology Co., Ltd. On June 24, 2010, CCTV organized an expert group to conduct an acceptance review of the "Application of LED Lighting Fixtures in TV Studios" project at Beijing Starlight Media Hotel. The expert group listened carefully to the report of the research team and inspected the relevant experimental facilities on site, reviewed the relevant documents, and after careful discussion, agreed that:
The project studied, tested and evaluated the main issues involved in the application of LED lighting in TV studios. Research shows that TV studios use LED lighting, energy saving effect is obvious; color rendering performance meets the needs of TV color reproduction, color temperature and color rendering are basically unchanged during dimming, suitable for TV studio lighting; LED light radiation is not It can cause harm to human skin. The project has achieved valuable research results.
The project uses a combination of experimental research, investigative research and theoretical analysis. Through the comparison of LED light source lamps with traditional tungsten halogen lamps, the problems that may be encountered in the application of LED lighting fixtures are obtained according to the predetermined technical scheme. Important research conclusions. The research method is reasonable and scientific.
The conclusions drawn by the project can reflect the actual situation of current domestic LED lamps in TV studio applications, and provide an important basis for the application and promotion of LED lamps in the TV field.
The acceptance materials of the project are complete and have reached the expected goals of the project.
In order to publish the research content in the society and let everyone share the research results, this article is based on the main content of the research and the overall research report.
First, the purpose and significance of the research
Lighting power consumption accounts for a large proportion of the total power generation in each country. China's lighting power consumption accounts for 10-12% of the country's total power generation. According to the Statistical Communiqué of the National Economic and Social Development of the People's Republic of China in 2009 (promulgated on February 25, 2010), China's total power generation in 2009 was 3,714.65 billion kWh (degrees), and lighting power consumption was 10% of the country's total power generation. It reached 371.47 billion kWh, which is about 4.39 times of the annual power generation capacity of the Three Gorges hydropower project (84.7 billion kWh). It can be seen that lighting power saving is of great significance.
On September 22, 2009, President Hu Jintao promised at the United Nations Climate Change Summit to significantly reduce greenhouse gas emissions. By 2020, emissions will be much lower than in 2005. On October 12, 2009, the National Development and Reform Commission announced the "Opinions on the Development of Semiconductor Lighting Energy-Saving Industry" and proposed the development goal of China's semiconductor lighting energy-saving industry. By 2015, the average annual growth rate of semiconductor lighting energy-saving industry output value is about 30%; The market share has increased year by year, the functional lighting has reached 20%, the LCD backlight has reached more than 50%, and the market share of landscape decoration and other products has reached more than 70%; the semiconductor lighting standard system has been initially established; the annual energy saving is 40 billion kWh. It is equivalent to 40 million tons of carbon dioxide emissions per year.
Film and television stage lighting (including theaters, TV studios, movie studios, auditoriums and other venues) consumes a lot of electricity. For example, a 90-minute stage performance consumes 2,250 degrees, which is equivalent to a 5-story office building. The total amount of electricity consumed in a day, 75% of which is lighting power consumption. There are more than 4,000 TV stations in the country, and each TV station has more than 10 studios. The power consumption of the studio due to lighting (including lamp power consumption and air-conditioning power consumption) accounts for 70-80%; There are tens of thousands of performance venues in auditoriums and other literary and artistic events. The lighting consumes a lot of electricity. It can be seen that the power saving of film and television stage lighting has very important significance.
In the past, the light sources used in stage lighting were mainly tungsten halogen lamps and gas discharge lamps (low-pressure discharge lamps - fluorescent lamps and high-intensity discharge lamps - metal halide lamps, xenon lamps). Although these light sources can meet the needs of film and television lighting in terms of illuminating performance, there are problems such as low light efficiency, short life, high power consumption, unstable operation, etc. The infrared radiation generated by the heat source lamps causes the ambient temperature to be too high. Have to use a powerful air conditioner to cool down. Therefore, it is necessary to find a new type of light source instead of the above light source. Semiconductor lamps are solid-state lighting, using light-emitting diodes (LEDs) as a new lighting source, which has many advantages that traditional lighting sources do not have. The biggest advantages of LED are energy saving, long life, high luminous efficiency, pure light color, fast response, and vibration resistance. These are the shortcomings of most traditional light sources. It is an inevitable trend of development to gradually replace some traditional light sources. Worldwide, LED lighting technology has been widely recognized as an efficient lighting energy-saving product with the greatest development potential and development prospects in the 21st century. It is called “semiconductor green lightingâ€.
At present, the international application of LED products to functional lighting has made breakthrough progress. With the continuous development of high-power LED module technology, the stage lighting source of the film and television has presented LED as the main illumination source. The development trend. However, there are still many technical problems to be solved in applying LED light sources to film and television stage lighting.
At present, TV studios, theaters and other cultural activities have begun to develop and apply LED lighting, such as CCTV news studio, English channel studio, Russian channel studio, etc., all or part of the use of LED lighting. However, China's research and development efforts in LED film and television lighting needs to be increased, and the technical level of lamps and lanterns needs to be further improved to meet the growing needs of the film and television lighting industry.
The application of LED lighting fixtures launched by CCTV in TV studios is a groundbreaking study that fills the gaps in research in this field at home and abroad. It is of great practical significance and epoch-making historical significance to promote the development of LED TV lighting fixtures in China and promote the popularization and application of LED lamps.
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