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Give us your idea, your unique circumstance, your individual need, and we will do our very best to come up with an optimum lighting solution tailored for you.  Entire prospect of Custom Lighting assists Fobsun Electronics in embracing our client's preference.

 

Custom Design

Custom LED LightingMany clients have a great idea but lack technical details to support the concept. Such technical details may include information about overall functionality and integration. Fortunately, a desired outcome is the only required information to initiate the application development process for a custom LED lighting solution. Our applications engineers specialize in determining exactly what is required to develop new custom lighting concepts. For example, suppose a client has decided to develop a computer mouse equipped with an LED lighting design for visual effects. The client has plans to design custom molds used for mass-production of the exterior plastic components, but the mold design must compliment LED light integration. Determining the desired outcome is the most important step in the process. In this example, suppose the client has decided that the left and right mouse buttons should illuminate blue and orange, respectively. An applications engineer will begin by conducting extensive researching within our central LED database. The goal is to locate the most suitable light emitting diodes to meet criteria specified by the client. To narrow search results, the engineer may explain the concept of several common LED characteristics such as beam angle and luminous intensity. Subsequent to a short question and answer session, the engineer can begin to narrow the search results based on client response. The engineer will eventually assist with physical and electrical aspects involved with incorporating the LED lights into the computer mouse. After considering all aspects of the new design, the client can proceed with plans to develop the mouse body molds.

LED Lighting Design

Beyond basic application interfacing, a realm of complex variables further complicates an otherwise strait forward LED lighting design. Environmental factors such as ambient temperature, humidity, and sun light will affect the basic operation and reliability of the LED light. Hot and humid conditions are generally bad. Therefore, considering the worst-case condition offers a baseline for engineering procedures. LED datasheets generally state operating criteria at room temperature. However, graph data usually offered subsequent to typical operating conditions provides data relative to alternative environments. A derating curve offers the maximum forward drive current according to temperature. Some datasheets offer lifespan or reliability data according not only to temperature, but also to humidity. It is important to consider this data while engineering an LED lighting solution with potential exposure to a fluctuating environment.

Custom Lighting Example

To further ones understanding of custom lighting, consider the following custom LED lighting solution. The objective is to design an LED array for a civilian airport lighting application, known as a PAPI. A third party designs and manufactures the housing component, originally engineered to meet strict Federal Aviation Administration regulations. Corresponding electronics are required to fit within the confines of the housing, and must operate from a particular power grid installed at the airport. Assume that optical requirements call for a red or white light visible from a distance of five miles during daylight. A successful overall design does not only depend upon specific optical requirements, but also on the mechanical and electrical compatibility with corresponding housing. Dimensional restrictions and mounting criteria are carefully considered. The interior volume of the housing will generally have a direct affect on thermal properties. In addition, mechanical connections with the housing can dissipate heat, theoretically creating a heat sink. Ventilation is also important. A common practice is strategically placing electronic components that generate excessive thermal energy in direct proximity to any openings or vents in the housing. Assume the airport's primary power grid operates at 120 volts AC, single phase, at 60 Hz. A high-grade linear power supply will function as a buffer between the primary power grid and LED circuitry. The supply's output rating is 48 volts DC with a maximum current of 12 amps. The linear power supply's voltage and current specifications provide a mathematical foundation necessary for engineering the corresponding LED circuitry.

custom LED lighting design Companies of various sizes employ electrical engineers, who they rely on heavily for their engineering needs. Although extremely educated, many electrical design engineers lack familiarity with numerous aspects of the custom LED lighting industry. The reason is obviously that the industry is in its infancy, and continues to evolve at a high-speed pace. Lunar Accents Design Corporation employs a team of professionals who are dedicated strictly to new technologies offered by the custom LED lighting industry. We can provide a level of engineering service incomparable to most competition. Our team strives to stay ahead of an evolving industry, and possess the knowledge and resources necessary to employ the newest lighting technologies in real-world lighting applications. Throughout the engineering process, Lunar Accents Design Corporation addresses many essential aspects of custom LED boards. This process contributes to a proficient design routine and ensures the completed product operates according to specification.

LED Circuits Design

Lunar Accents Design Corporation offers circuit design on various platforms. Our design engineers specialize in the various aspects of LED related circuitry. Our engineering team can develop and incorporate LED circuitry on system or component levels. Many LED lighting applications require custom designed control, driver circuitry, or LED boards. Reprogrammable control circuitry offers the flexibility to perform numerous product revisions while eliminating expensive hardware revisions. To achieve this capability, the circuitry may incorporate a PIC microcontroller or similar device. The microcontroller allows engineers to manipulate software anytime product revisions become necessary. Control circuitry may range in function, and can perform a preprogrammed routine or rely on sensory inputs for instruction. While control circuitry takes responsibility for logic related tasks, the LED driver circuitry supplies LEDs with the proper voltages and currents. Depending on the specifics of an application, the engineer may incorporate any of the various topologies commonly employed in LED driver circuitry. Among these include the buck, boost, buck-boost, and charge pumps.

The boost, buck-boost, and charge pumps can actually generate an output voltage higher than the original source voltage. Efficiency will generally vary between 60% and 90%. Buck, boost, and charge pumps topologies are generally more complex, and can increase material costs significantly in most LED circuits. Other LED applications may utilize pulse driving, pulse width modulation (PWM), or constant current sources. The constant current source regulates LED current, which can normally vary due to the input voltage as well as changes in LED forward voltage. This is beneficial as temperature varies, or when LED forward voltages deviate among various lots. The constant current source is about as efficient as a standard voltage regular circuit. Pulse driving permits LEDs to operate at peak current levels, while maintaining a minimal duty cycle. Pulse width modulation employed in dimming circuitry prevents color matching issues commonly associated with lower LED drive currents.

Interfacing Custom LED Lighting Solutions

Custom LED lighting applications most often contain external components, in addition to LED lights, associated electronics, and the LED boards on which the LED circuits are mounted. An external component refers to any item with an indirect association to the custom LED design, but with a mechanical, electrical, or optical correlation. From the mechanical aspect, a pre-designed housing unit or mounting bracket includes examples of external components with an indirect association to the design. Third-party power supplies are the most common form of external electrical component. In the case of an external optical component, a pre-designed transparent casing may play the role in application interfacing. In all three cases, third party components play a critical role in the overall product functionality. Successful application interfacing results from a design that complements all external mechanical, electrical, and optical components.

LED Boards Layout

The foundation of all electronic devices is the printed circuit board on which the electronic components are mounted. Almost all modern electronic devices contain some type of printed circuit board. Several popular acronyms for printed circuit board include the PCB or PC board. PCB manufacturing is extremely diverse, and allows for a wide variety of sizes, shapes, and compositions. PCBs commonly known as "Flex" feature a flexible material capable of forming numerous angles and shapes. All PCBs offer at least three very important primary functions characterized by physical, electrical, and thermal. LED lighting designs rely heavily on these functions of LED boards.

Strategically Selecting Light Emitting Diodes

The custom LED lighting design industry has matured into a vast league of optical semiconductor manufactures. Selecting the most appropriate component for LED circuits can be a daunting and time-consuming task, even for the most experienced of engineers. Many designers and engineers resort to sorting through endless catalog pages and websites in search of the perfect light emitting diode for their LED boards. Sub-categorizing LEDs by six key characteristics can optimize component selection and search results. This process combined with our optoelectronic component database, provides a very powerful tool designed to aid during the development of custom LED products and LED circuits.

LED Schematic Capture

Schematic capture provides a symbolic blue print depicting each electronic component or system, and the wire traces or relationships that will interconnect these components in the LED circuits. Lunar Accents Design will generate a schematic during the process of circuit design, prior to the design of custom LED boards. Computer software generates the schematic and produces an electronic file in PDF format. By special request, we will transmit the schematic file to the client. The schematic also remains in our file archives for future reference. Each schematic reflects all corresponding LEDs, control circuitry, and drive circuitry. Industry standard schematic symbol represent all LEDs and external electronic components. For complex LED lighting systems, a series of schematics will depict system operation on numerous levels. For example, the system level schematic shows relationships between overall systems. The components may include the power supply, control circuit, and driver circuit. Each component of this system level schematic will correspond with numerous component level schematics. For example, the driver level schematic may include discrete components such as LEDs, resistors, and FETs (field effect transistors). LED applications incorporating programmable microcontrollers will typically correspond with a special firmware flowchart. This flowchart depicts each specific operation installed within the firmware routine, as well as any relationships to sensory input devices. To maintain a higher level of organization and consistency, we assign an official project name and revision to all schematic files. Our standard revision code utilizes an alphabetical format starting with A.

Prototype LED Products

The prototype offers engineers with technical feedback for the first time. Decision-making based on mathematical formulas and experience has allowed the custom lighting project to advance to this point. However, unknown variables can lead to potential complications apparent only after testing of the LED circuits. If revisions are necessary, they are typically minor, if not cosmetic in nature. In many cases, producing a second prototype is highly recommended. Prototyping LED boards saves valuable time and money later on, during the manufacturing phase.

Volume LED Product Production

Lunar Accents offers in-house mass production for clients who prefer the benefits of a local relationship, and the convenience of a domestically based company. Our professional assemblers and technicians have undergone additional training relating to LED circuits and specific assembly procedures. At Lunar Accents Design Corporation, we are extremely proud to offer premium in-house services at only a fraction of the cost. We can offer extremely competitive rates for both surface mount and through-hole component assembly. In many cases involving turnkey projects, we are actually able to compete with overseas low-cost manufactures. In addition to circuit board assembly, we also perform final assembly and packaging for many of our clients. Our capabilities include low volume assembly by hand, as well as automated high volume production. In addition, we can perform a variety of wire and cable related production tasks. If you would like to receive a formal quotation for assembly-labor, please do no hesitate to contact a member of our sales department. We appreciate the opportunity to quote any LED or non-LED related assembly project.

 

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