China Demo Photoelectric Technology (Wuxi) Co., Ltd. Company News

As a global benchmark for the lighting industry, the 2025 Japan Tokyo International Lighting Fair (LIGHTING FAIR) will be grandly held from March 4th to 7th, 2025 at Tokyo Big Sight. Organized by the Japan Lighting Association and Nikkei Inc., this year’s fair will bring together over 400 exhibitors and more than 100,000 professional visitors, making it one of the largest and most professional lighting industry events in Asia. Exhibition Highlights: Focus on LED Technology Innovation and Market Opportunities LED Leading the Future of Lighting In recent years, the demand for LED lighting products in the Japanese market has continued to rise. This year’s exhibition has almost become an "exclusive stage for LED technology," showcasing cutting-edge technologies and products such as smart lighting systems, energy-efficient LED lighting fixtures, automotive lighting modules, and more. The fair will provide global companies with an excellent opportunity to gain insights into the high-standard market demands of Japan and connect with industry resources. A Comprehensive Range of Exhibits Covering the Entire Industry Chain From core components like LED chips, heat dissipation materials, and drivers, to end-user applications in residential, commercial, and outdoor lighting, the exhibition will cover lighting equipment, control systems, and testing instruments, presenting a complete industry ecosystem. Of particular note is organic lighting technology, whose flexible design and high efficiency are expected to become a new growth point in the future lighting field. Strategic Significance of the Japanese Market Japan, as a global leader in lighting technology research and development, has very high standards for product quality, environmental performance, and intelligent features. Through LIGHTING FAIR, companies can directly address the demands of Japanese customers. While our company will not be exhibiting directly, we continue to monitor the event closely and provide technical references and solutions for potential partners. About Us As a manufacturer dedicated to LED technology research and development, we are committed to continually upgrading our products with innovative designs. The latest LED series now available on our website feature energy-efficient designs and are adaptable to a variety of application scenarios. Visit our product page to explore technical specifications and customization services. The 2025 LIGHTING FAIR is not only a major event for the global lighting industry but also a bridge for technological innovation and market opportunities. We look forward to optimizing our products and services, and working with industry peers to drive the future of green lighting.   Demo Photoelectric Technology (Wuxi) Co., Ltd.   Email: master@demophotech.com Tel:+86 15312229119 Wechat/WhatsApp: +86 15312229119 Website:www.demophotech.com Address: 2/F, Block D, Liye Building, No. 20, Qingyuan Road, Xinwu District, Wuxi, China, 214135.    

Please note that our offices will be closed in observance of the New Year from January 1st to January 2nd, 2025. Operations will resume on January 2nd. During this time, our regular business activities will be temporarily suspended. However, we understand that some matters may require urgent attention. Rest assured, a dedicated team will be available to support you. For immediate assistance, kindly reach out to us at master@demophotech.com. We appreciate your understanding and wish you a wonderful holiday season!   Best Regards. Demo Administration Department December 31st 2024

Exhibition Dates: January 14-16, 2025 (Total 3 days) Venue Name: Dubai International Convention and Exhibition Centre Organizer: Messe Frankfurt (Dubai) GmbH Exhibition Location: Asia - United Arab Emirates - Dubai   The Light Middle East exhibition, organized by Messe Frankfurt, has become a leading global event in the architecture and lighting industry. Held annually in Dubai, UAE, it attracts a large number of industry professionals from around the world, showcasing cutting-edge technologies and solutions. As Chinese products gain increasing international recognition, exhibitors offering LED and interior decorative lighting are seeing growing demand from overseas buyers. With a steady rise in professional visitors, Light Middle East is solidifying its position as a major global lighting exhibition, alongside the renowned Frankfurt Light + Building and Guangzhou International Lighting Exhibition. Part of the Light + Building brand, Light Middle East serves as the premier event for the MENA (Middle East and North Africa) lighting and building services sector. The 2024 edition set new records in size and participation, featuring top global brands and innovative solutions across lighting, electrical engineering, smart home technologies, and building automation. Since 2006, the exhibition has been instrumental in driving industry growth, offering a platform for global brands, educational sessions, certification workshops, and awards that recognize excellence in the field. Join us at Light Middle East 2025 from January 14-16 in Dubai, where we’ll explore the future of lighting and smart buildings together!       Demo Administration Department Contact: Harold Wei Email: master@demophotech.com WhatsApp/WeChat/MP: +8615312229119, Skype: demolighting http://www.demophotech.com Add: 2/F, Block D, Liye Building, No. 20, Qing Yuan Road, Xinwu District, Wuxi City, Jiangsu Province, China, 214135

https://byjus.com/physics/light-emitting-diode/   The colour of an LED is determined by the material used in the semiconducting element. The two primary materials used in LEDs are aluminium gallium indium phosphide alloys and indium gallium nitride alloys. Aluminium alloys are used to obtain red, orange and yellow light, and indium alloys are used to get green, blue and white light. Slight changes in the composition of these alloys change the colour of the emitted light.

https://byjus.com/physics/types-of-led/ Introduction: LED (light-emitting diode) is a semiconductor light source that emits light when current flows through it. Their various types of LED are made of semiconductors and are classified into different categories. It is used due to its effectiveness in terms of lower power consumption, longer service life, better illumination. LEDs are very widely used in today’s electronics equipment, and they are one of the major display technologies in use today. There are various types of LEDs which are discussed in the points below. Classification of LED-based on sizes: Miniature Low-current Standard Ultra-high output Classification of LED-based on power delivered: High-Power Classification of LED-based on their application: Flash Bi and Tri-Colour RGB LEDs Alphanumeric Lighting LEDs Different Types of LED (Light-Emitting Diode) Miniature LEDs These are mostly used now these days. These are available in single shape and colour and are available in small sizes. It can be directly placed into a circuit board without the use of a heating or cooling device. These are classified into low-current, standard and ultra-high output depending upon various factors such as voltage, total watts, current, and manufacturer type. Miniature LEDs are used in small appliances such as remote controls, calculators and cell phones. High-Power LEDs These uses of LED results in high output compared to normal LEDs. The light emitted is measured in terms of lumens. These are again categorised based on luminous intensity, wavelength and voltage. These have a danger of overheating hence a heat-absorbing material is used to cool it down. High-Power LEDs are used in high-powered lamps, automobile headlights, in various industrial and mechanical equipment. Flash LED With a normal LED, it contains an integrated circuit which flashes the light at a particular frequency. These are directly connected to a power supply without the help of series resistors. It is used in signboards, vehicles etc. Bi and Tri-Colour Bi-colour LED lights consist of two light-emitting dies in a single case. The wiring is inversely parallel which means one is in the forward direction and another in backward which makes one die lit at one time. The flow of current alternates between two dies which results in colour variation. Tri-Colour LED lights design lets the two dies to lit separately or together producing a third colour. Red Green Blue LEDs These emit red, green and blue light and also allows to combine these three primary colours and produce a new colour. These are used in accent lighting, lights shows and status indicators. Alphanumeric LED These consists of segments which offer greater flexibility and lesser power consumption. In it, it has various types of LEDs such as: 14 and 16 segment- they cover full 26 characters of the Roman alphabet in uppercase and with numerals 0-9 7 segment- covers all numbers and limited set of letters Matrix segment- covers full alphabets (upper and lower), all number and a full variety of symbols. Lighting LED These LEDs use aluminium/ceramic body which provides heat dissipation. One example is the Edison light bulb design.

Observe the appearance of the LED ​ Lead length: In most cases, the longer lead of the LED is the positive terminal (anode), and the shorter lead is the negative terminal (cathode). Housing structure: The bottom of the LED housing usually has a flat surface, and the lead corresponding to this flat surface is typically the negative terminal (cathode). Internal structure: By looking through the transparent housing, the larger part (similar to a cup shape) inside the LED is the negative terminal, while the smaller part is the positive terminal.     Use a multimeter for testing ​ Diode mode (or resistance mode) on a digital multimeter: 1. Set the multimeter to diode mode or resistance mode. 2. Connect the red probe to one side of the LED and the black probe to the other side. 3. If the LED emits a faint light (or shows a voltage drop), the red probe is connected to the positive terminal, and the black probe is connected to the negative terminal. 4. If the LED does not light up, swap the probes and test again.     Use a simple circuit for testing ​ Prepare a low-voltage battery (such as a 3V button cell or two 1.5V batteries in series) and a resistor (e.g., 1kΩ resistor). Connect the positive terminal of the battery to one lead of the LED through the resistor, and the negative terminal to the other lead of the LED. If the LED lights up, the side connected to the resistor is the positive terminal; otherwise, swap the leads of the LED and try again.     Use a power supply module ​ Use an adjustable power supply or a low-voltage power module, set the voltage to around 2V–3V, and connect it across the LED terminals. If the LED lights up, the lead connected to the positive terminal of the power supply is the positive terminal of the LED; otherwise, swap the polarity and test again.     Check the datasheet ​ If the LED has a model number, you can look up the product's datasheet, which will clearly indicate the corresponding positive and negative terminals of the LED.     Summary ​ The simplest and quickest method is to observe the lead length and the flat surface of the housing. Alternatively, you can verify using a multimeter or a simple circuit. [When operating, make sure the voltage is within the LED's working voltage range to avoid damaging the LED.]         Contact: Harold Wei Email: master@demophotech.com WhatsApp/WeChat/MP: +8615312229119, Skype: demolighting http://www.demophotech.com Add: 2/F, Block D, Liye Building, No. 20, Qing Yuan Road, Xinwu District, Wuxi City, Jiangsu Province, China, 214135

https://byjus.com/physics/light-emitting-diode/   When the diode is forward biased, the minority electrons are sent from p → n while the minority holes are sent from n → p. At the junction boundary, the concentration of minority carriers increases. The excess minority carriers at the junction recombine with the majority charges carriers.     The energy is released in the form of photons on recombination. In standard diodes, the energy is released in the form of heat. But in light-emitting diodes, the energy is released in the form of photons. We call this phenomenon electroluminescence. Electroluminescence is an optical phenomenon, and electrical phenomenon where a material emits light in response to an electric current passed through it. As the forward voltage increases, the intensity of the light increases and reaches a maximum.

---https://en.wikipedia.org/wiki/Light-emitting_diode A light-emitting diode (LED) is a semiconductor device that emits light when current flows through it. Electrons in the semiconductor recombine with electron holes, releasing energy in the form of photons. The color of the light (corresponding to the energy of the photons) is determined by the energy required for electrons to cross the band gap of the semiconductor.[5] White light is obtained by using multiple semiconductors or a layer of light-emitting phosphor on the semiconductor device.[6] Appearing as practical electronic components in 1962, the earliest LEDs emitted low-intensity infrared (IR) light.[7] Infrared LEDs are used in remote-control circuits, such as those used with a wide variety of consumer electronics. The first visible-light LEDs were of low intensity and limited to red. Early LEDs were often used as indicator lamps, replacing small incandescent bulbs, and in seven-segment displays. Later developments produced LEDs available in visible, ultraviolet (UV), and infrared wavelengths with high, low, or intermediate light output, for instance, white LEDs suitable for room and outdoor lighting. LEDs have also given rise to new types of displays and sensors, while their high switching rates are useful in advanced communications technology with applications as diverse as aviation lighting, fairy lights, strip lights, automotive headlamps, advertising, general lighting, traffic signals, camera flashes, lighted wallpaper, horticultural grow lights, and medical devices.[8] LEDs have many advantages over incandescent light sources, including lower power consumption, a longer lifetime, improved physical robustness, smaller sizes, and faster switching. In exchange for these generally favorable attributes, disadvantages of LEDs include electrical limitations to low voltage and generally to DC (not AC) power, the inability to provide steady illumination from a pulsing DC or an AC electrical supply source, and a lesser maximum operating temperature and storage temperature. LEDs are transducers of electricity into light. They operate in reverse of photodiodes, which convert light into electricity.   https://byjus.com/physics/light-emitting-diode/ A light-emitting diode (LED) is a semiconductor device that emits light when an electric current flows through it. When current passes through an LED, the electrons recombine with holes emitting light in the process. LEDs allow the current to flow in the forward direction and blocks the current in the reverse direction. Light-emitting diodes are heavily doped p-n junctions. Based on the semiconductor material used and the amount of doping, an LED will emit coloured light at a particular spectral wavelength when forward biased. As shown in the figure, an LED is encapsulated with a transparent cover so that emitted light can come out.  

We will have a holiday of National Day of 2024 from October 1st to October 7th. Our operations will resume from October 8th on. During this holiday period, we will temporarily suspend our business operations, but we assure our clients and partners that a dedicated team will be available to address urgent matters. For assistance, please contact us at master@demophotech.com. Best Regards. Demo Administration Department September 30th 2024

Dear Valued Customers, We wish to notify you that our operations will be paused from September 15th to September 17th, 2024, in celebration of the Mid-Autumn Festival. Regular production will recommence on September 18th, 2024. We deeply regret any inconvenience this temporary closure may cause and kindly request your understanding. We remain fully committed to delivering the highest standards in both products and services and are eager to continue our valued collaboration upon our return. Thank you for your ongoing trust and support.   Warm regards, Demo Administration Department September 14th, 2024