[Text / "High-tech LED - Technology and Applications" September issue Long Zonghui]
"The cost reduction of domestic LED display should be considered from the aspects of production cost, maintenance cost and use cost." Wei Zhimin, manager of R&D department of Shenzhen Konka Video System Engineering Co., Ltd. (hereinafter referred to as "Kangjia Video"), introduced from the current industry. In terms of development, domestic LED display technology has moved from the low end to the high end, both in terms of clarity, intelligence, and stability. "Domestic LED displays are gradually taking over the market share of foreign manufacturers."
Konka Video was founded in 2001. In 2005, it was turned from a splicing wall to an LED display. In 2009, it officially entered the field of LED lighting. As a wholly-owned subsidiary of Konka Group Investment Holdings, Konka Video relies on its parent company's advantages in video processing, power supply design, and high level of support to attack the LED display market. With the popularity of the KONKA brand and the absolute advantage of the marketing service network, it has reached an annual output value of over 100 million and maintains a sales growth target of 20% per year.
Improve power supply solutions to improve energy efficiency
The energy-saving concept of LED display has become a bright spot that attracts consumers' attention and is also the reason for the rapid growth in recent years. After crazy growth in recent years, the industry is now in a dilemma of reshuffle.
Recently, there have been a few energy-saving LED displays on the market, which have improved the energy-saving effect by improving the power supply. However, more companies are adopting a solution that reduces the input voltage of the display from 5V to 4.2V. Since the forward driving voltage of red and blue and green bead must be kept at 2.4V and 3.6V, The discreteness of the driving IC and LED turn-on voltage exists. It is difficult to ensure the normal use of blue-green lamp beads when starting in low temperature regions, and the red light still needs to pass the resistance voltage drop, which will generate some useless heat, which invisibly increases the LED display. Screen power consumption loss.
Wei Zhimin advocates a 24V input voltage scheme, which is 15% higher than the 5V input voltage efficiency, and then meets the power supply requirements of various parts of the circuit through DC-DC conversion, and generates a thermal energy loss ratio of 5V input voltage. 1/3 lower. “Currently DC-DC technology is very mature, and its 98% high conversion efficiency is less than that of a conventional solution.†If the red, green and blue bead are separately powered, the LED display is energy-saving. Efficiency and service life will be increased to a greater extent.
Automatically adjust to mainstream market demand
“In the past few years, intelligent control has been a special requirement of customers, and it has become a standard now.†Wei Zhimin said that through the time program control or intelligent adjustment of the photosensitive device, unnecessary power waste can be effectively avoided.
According to the reporter's understanding, the current intelligent adjustment of LED display generally includes three types of LED display brightness control with time-controlled or ambient brightness, remote LED display operation monitoring, and direct connection with supplier SMS. Since the LED display is guaranteed to play normally under different angles and ambient light conditions. When the ambient light is bright, the LED display screen is too dark to clearly meet the viewer's visual requirements; when the ambient light is dark, the LED display is too bright, which may cause the viewer to glare and cannot see the image content.
At present, the LED display on the market mainly adopts time-segment control, and the highest is divided into 12 time periods every day, and the pulse current is controlled by the control system to achieve the purpose of adjusting the brightness of the LED display.
Unfinished
For more information, please refer to the September issue of "High-tech LED-Technology and Applications"
"The cost reduction of domestic LED display should be considered from the aspects of production cost, maintenance cost and use cost." Wei Zhimin, manager of R&D department of Shenzhen Konka Video System Engineering Co., Ltd. (hereinafter referred to as "Kangjia Video"), introduced from the current industry. In terms of development, domestic LED display technology has moved from the low end to the high end, both in terms of clarity, intelligence, and stability. "Domestic LED displays are gradually taking over the market share of foreign manufacturers."
Konka Video was founded in 2001. In 2005, it was turned from a splicing wall to an LED display. In 2009, it officially entered the field of LED lighting. As a wholly-owned subsidiary of Konka Group Investment Holdings, Konka Video relies on its parent company's advantages in video processing, power supply design, and high level of support to attack the LED display market. With the popularity of the KONKA brand and the absolute advantage of the marketing service network, it has reached an annual output value of over 100 million and maintains a sales growth target of 20% per year.
Improve power supply solutions to improve energy efficiency
The energy-saving concept of LED display has become a bright spot that attracts consumers' attention and is also the reason for the rapid growth in recent years. After crazy growth in recent years, the industry is now in a dilemma of reshuffle.
Recently, there have been a few energy-saving LED displays on the market, which have improved the energy-saving effect by improving the power supply. However, more companies are adopting a solution that reduces the input voltage of the display from 5V to 4.2V. Since the forward driving voltage of red and blue and green bead must be kept at 2.4V and 3.6V, The discreteness of the driving IC and LED turn-on voltage exists. It is difficult to ensure the normal use of blue-green lamp beads when starting in low temperature regions, and the red light still needs to pass the resistance voltage drop, which will generate some useless heat, which invisibly increases the LED display. Screen power consumption loss.
Wei Zhimin advocates a 24V input voltage scheme, which is 15% higher than the 5V input voltage efficiency, and then meets the power supply requirements of various parts of the circuit through DC-DC conversion, and generates a thermal energy loss ratio of 5V input voltage. 1/3 lower. “Currently DC-DC technology is very mature, and its 98% high conversion efficiency is less than that of a conventional solution.†If the red, green and blue bead are separately powered, the LED display is energy-saving. Efficiency and service life will be increased to a greater extent.
Automatically adjust to mainstream market demand
“In the past few years, intelligent control has been a special requirement of customers, and it has become a standard now.†Wei Zhimin said that through the time program control or intelligent adjustment of the photosensitive device, unnecessary power waste can be effectively avoided.
According to the reporter's understanding, the current intelligent adjustment of LED display generally includes three types of LED display brightness control with time-controlled or ambient brightness, remote LED display operation monitoring, and direct connection with supplier SMS. Since the LED display is guaranteed to play normally under different angles and ambient light conditions. When the ambient light is bright, the LED display screen is too dark to clearly meet the viewer's visual requirements; when the ambient light is dark, the LED display is too bright, which may cause the viewer to glare and cannot see the image content.
At present, the LED display on the market mainly adopts time-segment control, and the highest is divided into 12 time periods every day, and the pulse current is controlled by the control system to achieve the purpose of adjusting the brightness of the LED display.
Unfinished
For more information, please refer to the September issue of "High-tech LED-Technology and Applications"
This series features transparent LED screens, which are suitable for various indoor places and various stores, especially in storefronts with floor-to-ceiling glass windows. Installing the transparent screen against the glass wall has a very good effect. When the display is turned off, the audience can watch the indoor environment from the outdoors, and when the display is turned on, they can directly watch the content played on the display.It not only preserves the visibility in the store, but also can effectively display advertising videos to the other party, which is very practical.
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Guangzhou Cheng Wen Photoelectric Technology Co., Ltd. , https://www.ledscreencw.com