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LED stands for Light Emitting Diode. It is a semiconductor component that transforms electrical energy into light through the process of electroluminescence.

Types of LED

1. Standard LEDs: Basic LEDs used in indicators, displays, and signaling.
2. High-Power LEDs: Brighter and used in floodlights, automotive headlights, and streetlights.
3. RGB LEDs: Red, Green, and Blue LEDs that can produce a range of colours.
4. COB LEDs (Chip on Board): Multiple LED chips mounted on a single circuit board for uniform light distribution.
5. SMD LEDs (Surface Mounted Diodes): Compact and efficient for general-purpose lighting.
6. Filament LEDs: Designed to resemble traditional incandescent bulbs with modern LED technology.

How Does LED Work?

1. Semiconductor Material: LEDs use a semiconductor made of materials like gallium arsenide or gallium nitride.
2. Electroluminescence: When electrical current flows through the semiconductor, it excites electrons, causing them to release energy in the form of photons (light).
3. Phosphor Coating: For white light, blue LEDs are coated with phosphor materials to convert the blue light into white light.

LED Applications

• Residential Lighting: General lighting, ceiling lights, table lamps.
• Commercial Lighting: Offices, retail stores, and large venues.
• Street Lighting: Energy-efficient public illumination.
• Automotive Lighting: Headlights, brake lights, interior lights.
• Displays: TVs, computer monitors, and digital billboards.
• Signage: Outdoor and indoor advertising displays.
• Medical Equipment: Surgical lights, diagnostic tools.

LED Advantages

1. Energy Efficiency: Uses up to 80% less energy than incandescent bulbs.
2. Long Lifespan: Can last 25,000 to 50,000 hours or more.
3. Durability: Resists shocks, vibrations, and extreme temperatures.
4. Eco-Friendly: Free of toxic materials like mercury.
5. Instant Lighting: Lights up immediately without warm-up time.
6. Dimmable: Many LEDs can be adjusted for brightness.
7. Design Flexibility: Available in various shapes, colors, and sizes.

LED Disadvantages

1. Higher Initial Cost: More expensive upfront compared to traditional lighting.
2. Heat Sensitivity: Requires proper heat dissipation to maintain performance.
3. Color Accuracy: Lower-quality LEDs may have poor color rendering.
4. Blue Light Emission: Excessive blue light exposure may cause discomfort or disrupt sleep.
5. Compatibility Issues: Some older fixtures or dimmers may not work well with LEDs.

The post LED Meaning, Types, Working, Applications, Uses & Advantages appeared first on ELE Times.

LED (Light Emitting Diode) lighting is a lighting technology that utilizes semiconductors to transform electrical energy into visible light. LEDs are highly efficient, durable, and versatile, making them suitable for a wide range of applications, from home lighting to industrial and automotive use.

History of LED Lighting

• 1907: H.J. Round first observed electroluminescence in silicon carbide, which became a foundational discovery for the development of LED technology.
• 1962: Nick Holonyak Jr., working at General Electric, created the first visible-spectrum LED (red).
• 1970s: LED technology expanded with additional colors like green and yellow, though applications were limited to indicators and displays.
• 1990s: Blue LEDs were developed by Shuji Nakamura, enabling the creation of white LEDs by combining blue light with phosphor coatings.
• 2000s: LEDs began to replace traditional incandescent and fluorescent lighting in many applications due to advances in efficiency, color rendering, and cost.
• Today: LEDs dominate the lighting industry with widespread applications, from smart home systems to streetlights and displays.

Types of LED Lighting

1. Miniature LEDs
   • Used in indicators, displays, and small electronics.
2. High-Power LEDs
   • Brighter and used in high-intensity applications like floodlights and automotive headlights.
3. RGB LEDs
   • Combine red, green, and blue LEDs to produce various colors; used in displays and decorative lighting.
4. COB LEDs (Chip on Board)
   • Provide high brightness and even light distribution; common in spotlights and downlights.
5. SMD LEDs (Surface-Mounted Diodes)
   • Compact and versatile; widely used in strip lighting and general-purpose lighting.
6. Filament LEDs
   • Mimic traditional filament bulbs; used for decorative lighting.

How Does LED Lighting Work?

1. Semiconductor Materials: LEDs use a semiconductor (typically gallium arsenide or gallium nitride).
2. Electric Current: When electricity flows through the diode, electrons combine with holes in the semiconductor material, releasing energy in the form of photons (light).
3. Phosphor Coating: For white light, a blue LED is coated with a phosphor material to convert blue light into white light.

Applications of LED Lighting

• Residential: General lighting, decorative lighting, and smart home systems.
• Commercial: Office spaces, retail displays, and signage.
• Industrial: Factory lighting, warehouse illumination, and hazardous environments.
• Automotive: Headlights, interior lighting, and brake lights,
• Street Lighting: Energy-efficient public lighting systems.
• Displays: TVs, monitors, and large digital billboards.
• Medical: Surgical lighting and diagnostic devices.

How to Use LED Lighting

1. Select the Right Type: Choose LEDs based on brightness (lumens), color temperature (warm, cool, or daylight), and beam angle.
2. Install Proper Fixtures: Use fixtures designed for LEDs to ensure optimal performance and longevity.
3. Control Options: Utilize dimmers, smart systems, or RGB controllers for customized lighting.
4. Placement: Position LEDs effectively to reduce glare and enhance the desired ambiance.

Advantages of LED Lighting

1. Energy Efficiency: LEDs consume up to 80% less power compared to traditional incandescent bulbs.
2. Long Lifespan: Can last 25,000–50,000 hours, significantly longer than traditional lighting.
3. Durability: Resistant to shocks, vibrations, and extreme temperatures.
4. Eco-Friendly: Contains no toxic materials like mercury and emits less heat.
5. Design Flexibility: Available in various shapes, colours, and sizes.
6. Instant Illumination: LEDs turn on immediately without any warm-up period.
7. Dimmable and Controllable: Many LEDs support dimming and integration into smart lighting systems.

Disadvantages of LED Lighting

1. Higher Upfront Cost: LEDs are more expensive initially compared to traditional lighting.
2. Heat Sensitivity: Performance can degrade if not properly cooled.
3. Color Rendering: Some cheaper LEDs may have lower color rendering accuracy.
4. Blue Light Concerns: Excessive blue light exposure from LEDs may cause eye strain or disrupt sleep cycles.
5. Compatibility Issues: May not work well with older dimmers or fixtures without modifications.

The post LED Lighting Definition, Types, Applications and Benefits appeared first on ELE Times.

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OEMs are shifting from installing black box solutions that specialized functions in the more conventional domain architecture to a zone architecture and a function-agnostic processing backbone where each node handles location-specific data. Along with this trend, there is a push towards optimizing sensor functions, fusing multimodal input data with ML for contextual awareness. Sensors no longer serve one function, instead they can be leveraged in a series of automotive systems from driver monitoring systems (DMSs) to smart door access. As a result, camera/sensor count is minimized and power consumption maximized. A tour of several booths at CES 2025 showed some of the automotive-oriented solutions.

Automotive lighting

Microchip’s intelligent smart embedded LED (ISELED), ISELED light and sensor network (ILaS), and Macroblock lighting solutions can be seen in Figure 1. The ISELED protocol was developed to overcome the issue of requiring an external IC per LED to control the color/brightness of individual LEDs. Instead, Microchip has integrated an intelligent ASIC into each LED where the entire system can be controlled with a simple 16-bit MCU. The solution allows for more styling control for aesthetics with additional use cases such as broadcasting the status of a car via text that appears on display-based matrix lighting.

Figure 1: Microchip ISELED lighting solution where all of these LEDS are individually addressable allowing designers to change color/brightness levels of each LED. 

ADI’s 10BASE-T1S ethernet to edge bus (E2B) tech has been used as a body control and automotive lighting connectivity solution. And, while this solution is not directly related to LED control, it can be used to update OEM automotive lighting systems that leverage the 10BASE-T1S automotive bus. 

In-cabin sensing systems

One of the more pervasive themes were child presence detection (CPD) and occupancy monitoring system (OMS) products, with many companies showing off their ultra-wide band (UWB) detection and/or ranging tech and 60-GHz radar chips. The inspiration here comes from the incessant pressure on OEMs to meet stringent safety regulations. For instance, The Euro NCAP advanced program will only offer rewards to OEMs for direct sensing systems for CPD. For UWB sensing, the typical setup involved 4 UWB anchors placed outside of the vehicles and two on the inside to detect a phone equipped with UWB. The NXP booth’s automotive UWB demo can be seen in Figure 2. As shown in the image, the UWB radar will be able to identify the distance of the phone from the UWB anchor and unlock the car from the outside using the UWB ranging feature with time of flight (ToF) measurements. The very same principles can be applied for smart door locks and train stations, allowing passengers with pre-purchased train tickets to pass the turnstile from outside of the station to the inside of it.  

Figure 2: The NXP automotive UWB radar smart car access solution.

Qorvo also showed their UWB solution, Figure 3 shows one UWB anchor on a toy car for demonstration purposes. The image also highlights another ADAS application of radar (UWB or 60 GHz): respiration and heartbeat detection. 

An engineer at NXP granted a basic explanation of the process: the technology measures signal reflections from occupants to detect, for instance, how often the chest is expanding/contracting to measure breathing. This allows for direct-sensing of occupants with algorithms that can discern whether or not a child is present in the vehicle, offering a CPD, OMS, intrusion & proximity alert, and a host of other functions with the established sensor infrastructure. It is apparent that there is no clear answer on the number of wireless chips but there is more of a clear requirement that sensors are becoming more intelligent to minimize part-count—a single radar chip could eliminate five in-seat weight sensors. 

Figure 4: Qorvo’s UWB keyless entry and vitals monitoring solutions in partnership with other companies.

TI’s CPD, OMS, and driver monitoring system (DMS) can be seen in Figure 5 with a combination of their 60-GHz radar chip and a camera. Naturally, the shorter wavelength 60-GHz radar offers much more range resolution so this system would likely be more accurate in CPD applications potentially offering less false positives. However, possibly the most obvious benefit of utilizing 60 GHz radar is the fact that a single module replaces the 6 UWB modules for CPD, OMS, intrusion detection, gesture detection, etc. This however, does not entirely sidestep UWB technology; the ranging aspect of UWB allows for accurate smart door access and this is something that may be impractical for 60-GHz technology, especially considering the atmospheric absorption at that particular frequency. 

Figure 5: TI’s CPD, OMS, and driver monitoring system (DMS) CES demo.

AD and surround view systems

Automotive surround view cameras for AD and ADAS functions were also presented in a number of booths. Microchip’s can be seen in Figure 6 where their serializers are used in three cameras that can transmit up to 8 Gbps. The Microchip deserializers are configured to receive the video data and aggregate it via the Automotive SerDes Alliance Motion Link (ASA-ML) standard to the central compute, or high-performance computer (HPC), mimicking a zonal architecture.

Figure 6: Microchip’s ASA-ML standard 360o surround view solution.

ADI also used a serializer/deserializer (SerDes) solution with a gigabit multimedia serial link (GMSL) demo. GMSL’s claim to fame is its lightweight nature, the single-strand solution transports up to 12 Gbps over a single bidirectional cable, shaving weight.

Figure 7:  ADI GMSL demo aggregating feeds from six cameras into a deserializer board and going into a single MIPI port on the Jetson HPC-platform.

Using VLMs for AD

Ambarella, a company that specializes in AI vision processors showed a particularly interesting AD demo that integrated LLM in the stack. This technology was originally developed by Vislab, an Italian startup that is now an R&D automotive center under Ambarella. The system consisted of 6 cameras, 5 radars, and Ambarella’s CV3 automotive domain controller for  L2+ to L4 autonomy. The use of the vision language model (VLM) LLaVA-OneVision allowed for more context-aware decision making. 

Founder of Vislab, Alberto Broggi hosted the demo and explained the benefits of leveraging an LLM in this particular use case, “Suppose you have the best perception in the world, so you can perceive everything; you can understand the position of cars, locate pedestrians, and so on. You will still have problems, because there are situations that are ambiguous.” He continued by describing a few of these situations, “If you have a car in front of you in your lane, you don’t really know whether or not you can overtake because it depends on the situation. If its a broken down vehicle, you can obviously overtake it. If it’s a vehicle that is waiting for a red light, you can’t. So you really need some higher level description and context.”

Figure 8 and the video below shows one such example of contextual-awareness that a VLM can offer.

Figure 8: Ambarella VLM AD demo with use case offering some contextual-awareness and suggestions.  

Aalyia Shaukat, associate editor at EDN, has worked in the design publishing industry for six years. She holds a Bachelor’s degree in electrical engineering from Rochester Institute of Technology, and has published works in major EE journals as well as trade publications.

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The post Automotive insights from CES 2025 appeared first on EDN.

Editors from EDN and our AspenCore sister publications are covering the Consumer Electronics Show (CES). Scroll down to see coverage of this year’s CES! 

	CES 2025: Day 2 Wrap and Interview with EdgeCortix’s CEO A constant theme at CES 2025 this week has been around the deployment of AI in all kinds of applications, how to drive as much intelligence as possible to the edge, sensor fusion and making everything smart. We saw many large and small companies developing technologies and products to optimize this process, aiming to get more “smarts” or performance with less effort and power.
	CES 2025: Approaches towards hardware acceleration It is clear that support for some kind of hardware acceleration has become paramount for success in breaking into the intelligent embedded edge. Company approaches to the problem run the full gamut from hardware accelerated MCUs with abundant software support and reference code, to an embedded NPU.
	CES 2025: It’s All About Digital Coexistence, and AI is Real CES 2025 commenced in Las Vegas, Nev., on Sunday at the Mandalay Bay Convention Center for the trade media with the Consumer Technology Association’s annual tech trends survey and forecast. Plus, there was a sneak preview provided to some of the exhibiting companies at the CES Unveiled event.
	Integration of AI in sensors prominent at CES 2025 Miniaturization and power efficiency have long defined sensor designs. Enter artificial intelligence (AI) and software algorithms to dramatically improve sensing performance and enable a new breed of features and capabilities. This trend has been apparent at this year’s CES in Las Vegas, Nevada.
	Software-defined vehicle (SDV): A technology to watch in 2025 Software-defined vehicle (SDV) technology has been a prominent highlight in the quickly evolving automotive industry. But how much of it is hype, and where is the real and tangible value? CES 2025 in Las Vegas will be an important venue to gauge the actual progress this technology has made with a motto of bringing code on the road.
	CES 2025: Wirelessly upgrading SDVs SDVs rethink underlying vehicle architecture so that cars are broken into zones that will directly service the vehicle subsystems that surround it locally, cutting down wiring, latency, and weight. Another major benefit of this is over-the-air (OTA) updates using Wi-Fi or cellular to update cloud-connected cars; however, bringing Ethernet to the automotive edge comes with its complexities.
	CES 2025: Moving toward software-defined vehicles TI’s automotive innovations are currently focused in powertrain systems; ADAS; in-vehicle infotainment (IVI); and body electronics and lighting. The recent announcements fall into the ADAS with the AWRL6844 radar sensor as well as IVI with the AM275 and AM62D processors and the class-D audio amplifier.
	CES 2025: Day 1 Recap with Synaptics, Ceva EE Times and AspenCore staff are on-site at CES 2025, providing expert coverage on the latest and greatest developments at one of the largest tech events in the world.
	CES 2025: A Chat with Siemens EDA CEO Mike Ellow Siemens showcased its latest PAVE360 digital twin solution this year at CES 2025, lowering the barrier between design efforts that are typically siloed. EE Times had an opportunity to chat with Siemens EDA CEO Mike Ellow about how this approach to design is relevant for the semiconductor industry—especially considering the recent uptick in using AI tools at every level of a system to dynamically assess the trickle up/down effects of design adjustments.
	CES 2025: An interview with Si Labs’ Daniel Cooley At the forefront of many of the CES wireless solutions is WiFi’s newest iteration (WiFi 6), BLE and BLE audio for their already-established place in consumer devices. A chat with Silicon Labs CTO Daniel Cooley illuminated the company’s presence and future in IoT and the intelligent edge.

 

The post CES 2025 coverage appeared first on EDN.

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