シチズン電子 List of Products and Services

We have consolidated our core technology to achieve a maximum luminous efficiency of 142 lm/W (3000K/Ra90, Tj85, under rated drive conditions). This allows for brighter illumination with less power, contributing to energy savings in lighting fixtures. Additionally, we have improved long-term reliability and gas resistance characteristics. The energy-saving effects from enhanced luminous efficiency, along with longer intervals between replacements and repairs of LED light sources and lighting fixtures, also contribute to reducing environmental impact. By improving the amount of light obtained per package, we also contribute to the miniaturization of lighting fixtures and cost reduction. <Applications> Street lights, tunnel lights, floodlights, downlights, stadium lighting, etc. 【Features】 - Luminous efficiency: up to 142 lm/W (3000K/Ra90, Tj85, under rated drive conditions) - Supports a lineup of color temperatures and color rendering - Easy replacement from conventional products, covering 3W to 480W with 14 varieties across 4 packages (at Tj85°C) and reducing color variation - Improvement in maximum rated drive current For product details, please check our website.

• LED lighting

We have consolidated our core technology to achieve a maximum luminous efficiency of 115lm/W (3000K/Ra90, Tj85, under rated drive conditions). This allows for brighter illumination with less power, contributing to energy savings in lighting fixtures. Additionally, we have improved long-term reliability and gas resistance characteristics, which not only enhances energy-saving effects due to increased luminous efficiency but also extends the intervals for replacing or repairing LED light sources and fixtures, thereby reducing environmental impact. By improving the amount of light obtained per package, we also contribute to the miniaturization of lighting fixtures and cost reduction. <Applications> For spot lighting in facilities, stores, hotels, restaurants, etc. For applications requiring narrow angles 【Features】 - Easy optical design with lenses and other components - Contributes to miniaturization and design aesthetics of fixtures - Offers one of the smallest sizes in the industry (LES size φ2.4mm) For product details, please visit our website.

• LED lighting

With the spread of LEDs, the applications of light have expanded not only in terms of brightness and luminous efficiency but also in creating lighting that makes objects appear more beautiful and attractive, leading to an increasing demand for "light quality" in lighting LEDs. In response to such lighting needs, our company has developed the high-color-saturation LED CITILED VIVID series, aimed at enhancing saturation and making the inherent colors of objects appear more vivid. <Applications> CITILED VIVID Series Brilliant: Ideal for spot lighting in store displays and museums CITILED VIVID Series Natural: Suitable for lighting in retail spaces, libraries, and educational facilities 【Features】 ■ Illuminates objects more vividly ■ Improves contrast between light and dark, enhancing visibility For product details, please check our company website.

• LED lighting

We would like to introduce our CITILED COB Horticulture series of plant growth LEDs. Utilizing our unique spectrum tuning technology, we can provide a spectrum suitable for the growth of commercial plants at a high output. <Applications> Supplemental lighting for plant factories and open-field cultivation, etc. 【Features】 ■ Spectrum optimized for plant growth ■ High-output COB light source ■ Long lifespan and high visibility For product details, please check our website.

• LED lighting

This product utilizes the advanced packaging technology and high-quality, high-reliability technology that our company has accumulated to improve issues such as yellow ring and color unevenness that occur in conventional products, enabling uniform light emission without inconsistencies for lighting LEDs. It resolves light unevenness on the emission surface, making it ideal for ambient lighting in spaces such as hotels, restaurants, and museums where harmony is emphasized. The need for specialized design and development of lenses required for conventional unevenness countermeasures, as well as material costs, can be reduced. Additionally, the improvement in brightness unevenness on the emission surface is expected to reduce glare that occurs in outdoor lighting. <Applications> Landscape lighting such as spotlights, downlights, and wall washers. 【Features】 - Improvement of yellow ring and color unevenness - Reduction of development burden and number of components in optical systems - Reduction of glare that occurs in outdoor lighting fixtures Product details can be confirmed on our company website.

• LED lighting

Based on the precision plastic mold manufacturing technology cultivated through watch components, we have developed know-how in mirror surface processing through the machining of optical components related to LEDs. By using cutting processing finishing to achieve a mirror surface, we can perform complex mirror surface processing as per design specifications. Our capabilities extend from flat surfaces to freeform surfaces, contributing to all types of optical components. 【Features】 - Achieves nanoscale surface processing without polishing - High shape and surface accuracy realized through cutting finishing - Processed under thorough temperature control - Capable of handling everything from mold manufacturing to injection molding *For more details, please visit our company website or feel free to contact us.

• Mold Design

Microneedles are extremely small needles with a diameter or length of less than 0.2mm, gaining attention as painless injection needles. Citizen Electronics utilizes its precision processing technology and know-how developed over the years to accommodate a variety of microneedle shapes. We offer microneedle masters created through metal cutting processes, as well as the production of polymer microneedles using injection molding molds based on these microneedle masters. 【Features】 - Shape accuracy ±0.002mm - High aspect ratio (over 10 times) - Support from master to resin molding - Solid molding/hollow molding support - Molding with biodegradable resins *For more details, please visit our website or feel free to contact us.

• Processing Contract

This is a compact infrared light source available in three types tailored for various applications such as AR/VR, biometric authentication, and surveillance cameras. We offer a wide range of infrared LEDs to suit different needs, from narrow beam angles to wide distribution angles. Among them, we have developed an ultra-compact LED measuring 1.0mm x 0.4mm with a depth of 0.78mm, capable of outputting narrow infrared light with a half-angle of 80°. <Applications> Light source for eye tracking, face tracking, and gesture tracking (for AR/VR) 【Features】 (CL-300IRF-X) - Ultra-compact - Narrow beam angle - High output *For more details, please visit our website or feel free to contact us.

• Sensors

The quantum-type infrared sensor enables non-contact and high-speed temperature measurement. 【Features】 - High response speed (under 0.1 sec), suitable for measuring the temperature of moving parts - Low power consumption (11uA), highly compatible with battery-operated devices and solar power equipment - Compact and thin package, allowing for integration into small devices *For more details, please visit our website or feel free to contact us.

• Sensors

We would like to introduce our "Stacked Structure VCSEL Package." Thanks to our packaging technology, we have achieved a driver-integrated package. We have successfully miniaturized while maintaining high heat dissipation, achieving 2.5 times the optical output compared to conventional products and high-speed response. As a result, we have realized a 50% reduction in system size. <Applications> AGVs (Automated Guided Vehicles), cleaning robots, facial recognition systems, drones, etc. 【Features】 ■ Driver-integrated package ■ 2.5 times the optical output compared to conventional products ■ 50% reduction in system size ■ Lineup of double junction/triple junction VCSELs ■ Built-in safety features (overcurrent, temperature) *For more details, please refer to the PDF catalog or feel free to contact us.

• Sensors

This is a unique packaging technology that achieves excellent dust and waterproof performance for electronic components. It enables miniaturization, which has been a challenge with traditional lead frame methods. 【Features】 - Dust and Waterproof Performance By sealing the core components with lamination, dustproof and waterproof performance can be achieved. (The IP level varies depending on the selected components and the packaging structure suited for the application.) - Improved Productivity This technology allows for the lamination of a large number of core components at once, followed by dicing to create individual pieces, enabling the production of thousands to tens of thousands of electronic components simultaneously. This significantly enhances productivity compared to traditional lead frame packaging. Additionally, by encapsulating multiple core components in a single product, the added value of the product can also be improved. Furthermore, some optical components can be produced without molds, allowing for shorter lead times. - Miniaturization By replacing the lead frame with a circuit board, the line width can be narrowed to around several tens of micrometers. This also allows for the miniaturization of the components themselves. For example, in our tactile switches, we have achieved a 20% reduction in size compared to conventional products.

• Circuit board design and manufacturing

White LEDs are used as the lighting source, but there are several methods to create that white light. One method is to combine red, green, and blue LEDs. This method has good color rendering properties but faces challenges in terms of cost and luminous efficiency. Therefore, a method that combines blue LEDs with yellow phosphors has been used so far, as it allows for relatively easy attainment of high luminous efficiency. However, this method has the drawback that the emitted color is a pseudo-white, making it unsuitable for applications that require high color rendering properties. Additionally, there is a method that creates white light by combining near-ultraviolet LEDs with blue, red, and green phosphors, but this is said to have issues with brightness. In response, Citizen Electronics has adopted a method that uses blue LEDs to excite red and green phosphors. This method serves as a light source for LEDs with high color rendering properties while overcoming challenges related to cost and efficiency.

• LED lighting

When the light source changes, the same color can appear differently. This property of how the light source affects the perception of color is called color rendering. A light source is said to have good color rendering if the way colors appear is close to how they look under natural light (sunlight), and conversely, it is said to have poor color rendering if it does not. In Japan, color rendering is assessed based on the JIS color rendering evaluation method, which is based on the CIE (International Commission on Illumination) evaluation method, and is generally expressed using the average color rendering index (Ra). Generally, if Ra is 80 or above, it can be said to have good color rendering. The difference in color rendering among light sources is due to the varying intensities of each wavelength contained in the light source. This can be understood by comparing the spectral distributions of each light. For example, natural light (sunlight) contains light of different wavelengths almost uniformly within the visible light range (380nm to 780nm), whereas white fluorescent lights have considerable variation in the distribution of the wavelengths of light they contain. The closer the spectral distribution of a light source is to that of natural light, the more similar the appearance of colors will be to those under natural light, resulting in better color rendering. Citizen Electronics is committed to developing products that focus on color perception. Product list: https://ce.citizen.co.jp/products/led_category

• LED lighting

Light is a type of electromagnetic wave, and the electromagnetic waves with wavelengths ranging from 380 nm to 780 nm are visible light, or "light," to our eyes. When sunlight passes through a prism, it splits into multiple colors of light, resembling a rainbow. Our eyes perceive light as white when it contains a mixture of all wavelengths of visible light, and even when only red, green, and blue light are mixed together, it is still perceived as white light. These three colors—red, green, and blue—can be combined in various amounts to create almost all colors of light. Therefore, these three colors are referred to as the primary colors of light, as they serve as the basic colors for synthesis.

• LED lighting

The LED that emits light is made up of n-type semiconductors, which have a high concentration of negative electrons, and p-type semiconductors, which have a high concentration of positive electrons. When current flows through this, positive and negative electrons collide vigorously and combine. At this moment, the energy they possessed becomes more stable at a lower energy level, and the excess energy is released as light (emission occurs at the junction). This is the principle of light emission in LEDs. Unlike traditional light bulbs that utilize light emitted from a filament heated by electricity, LEDs convert electricity directly into light, resulting in characteristics such as low power consumption and long lifespan that are not found in conventional lighting.

• LED lighting

Conventional electrode switches have been implemented separately from the electrodes and switches, which has posed a challenge due to misalignment. The product developed here integrates the electrode and switch into a single package by applying the packaging technology that our company has cultivated over many years, thereby eliminating misalignment. Additionally, it does not require separate implementation for devices, contributing to space-saving in equipment. <Applications> ECG functions in wearable devices such as smartwatches, etc. 【Features】 ■ Integrated switch and ECG electrode ■ Compact and space-saving ■ High click feel *For more details, please refer to the PDF catalog or feel free to contact us. *This product is currently under development.

• switch

This is a multi-color compatible switch that lights up in the center (directly below the push button) due to its unique structure. We have developed a central illuminated switch that achieves a balance between switches and LEDs, as is characteristic of manufacturers that handle LEDs. This central illuminated switch can be used more broadly than conventional side-lit illuminated switches. It is equipped with waterproof functionality (IPx7) and supports multi-color and white LEDs. <Applications> Steering wheels, instrument panels, game controllers, etc. 【Features】 ■ Multi-color LED + white LED ■ Central illumination ■ Waterproof performance (IPx7) *For more details, please refer to the PDF catalog or feel free to contact us. *This product is still under development.

• switch

We will apply the small switch technology that our company has cultivated over many years to realize the "ultra-narrow switch." While contributing to the space-saving of devices, it is also equipped with vibration and waterproof functions equivalent to IP67. This switch is ideal for various wearable devices that require miniaturization. <Applications> For various wearable devices that are becoming smaller and for foldable smartphones that are expected to become thinner, such as: Specific examples: smartwatches, smart glasses, foldable phones 【Features】 ■ Allows switch installation in ultra-narrow spaces with a short dimension of less than 1mm ■ Dustproof and waterproof performance equivalent to IP67 ■ Achieves high tactile feedback and high reliability with accumulated know-how *For more details, please refer to the PDF catalog or feel free to contact us. *This product is currently under development.

• switch

In response to the three-dimensional deformation of the elastomer, a structure is formed where three cantilevers displace, theoretically allowing for multi-input by detecting the changes in the cantilevers as changes in electrical resistance. <Applications> - 3D input devices for wearable devices (tap, press, swipe, rub, twist) - Applications for sensors that detect minute, small, and micro-vibrations Specific examples: VR goggles/controllers, smart glasses, smartwatches, etc. 【Features】 ■ 3D detection of force (direction and strength) ■ Compact and thin ■ High sensitivity *For more details, please refer to the PDF catalog or feel free to contact us. *This product is currently under development.

• Sensors

It adopts a capacitive method, where the capacitance changes according to the magnitude of the load. Thanks to its unique structure, it enables detection in two stages: at the moment of contact and after the load change. It senses instantly upon touch and can detect even weak forces! It achieves low power consumption compared to resistive methods, making it suitable for battery-powered devices. Additionally, utilizing our technology, it features a "dustproof and waterproof structure" and is "compact and thin," accommodating various applications. It can also be applied to multi-directional input types. <Applications> - Enables control of rotation speed, velocity, and quantity based on the strength of the pressing force. - Can convey intuitive human actions to devices. Examples: Game controllers, power tools, robotic arms, etc. 【Features】 ■ Capacitive method ■ Capacitance changes according to the magnitude of the load (two-stage detection possible) ■ Low power consumption compared to resistive methods (suitable for battery-powered devices) ■ Dustproof and waterproof structure ■ Compact and thin ■ Applicable to multi-directional input types *For more details, please refer to the PDF catalog or feel free to contact us. *This product is currently under development.

• Sensors

We would like to introduce our top-emitting multi-color LEDs. Thanks to our unique packaging technology based on high-density mounting technology, we have achieved a high level of color mixing that prevents color separation while controlling the three RGB elements to produce a natural white light. <Applications> Illumination and indicator applications for gaming devices, computer keyboards, home appliances, hobbies, amusement equipment, as well as display applications and automotive ambient lighting and color lighting. 【Product Features】 ■ Achieves natural white light with high color mixing capability - Realizes natural white light with high color mixing capability by controlling directionality - As a light source that does not cause color separation, it enhances design flexibility and can be used in various applications ■ Achieves high brightness and miniaturization, doubling the luminous efficiency per unit area - Realizes a compact package with excellent color mixing capability - Achieved a 30% reduction in area ratio and a 50% reduction in luminous area ratio compared to our conventional products - Luminous efficiency has improved by approximately twofold, enabling reduced power consumption This product is a top-emitting multi-color LED that achieves high color mixing capability, high brightness, and miniaturization. You can check the comparison with conventional products and product details on our website.

• Chip type LED

We would like to introduce our small chip LEDs (high-brightness white LEDs). We offer a rich lineup including the top-emitting types "CL-194S series" and "CL-A131 series," as well as the side-emitting type "CL-963 series." These products are high-brightness, slim packages suitable for LCD backlight light sources in communication devices. They can be used in combination with light guide plates. 【Features】 ■ High-brightness, slim package ■ Compact, high-quality, high-performance lineup ■ SMD (surface mount) compatible ■ Reflow and soldering capable ■ Lead-free and compliant with RoHS directives ■ Contributes to cost reduction through automation of mounting *For more details, please visit our website or feel free to contact us.

• switch

We would like to introduce our small chip LEDs (multi-color) that we handle. We offer a rich lineup, including the top-emitting types "CL-505S series" and "CL-341 series," as well as the side-emitting type "CL-426 series." These LEDs incorporate red, green, and blue elements in a single package, making them suitable for various applications such as indicators (status displays), illumination, and logo lighting. 【Features】 ■ Incorporates red, green, and blue elements in a single package ■ Compact, high-quality, and high-performance lineup ■ SMD (surface mount) compatible ■ Contributes to cost reduction through automation of mounting *For more details, please visit our website or feel free to contact us.

• switch

We would like to introduce our "Precision Machining Technology." In "Cutting Mirror Surface Processing," we accommodate materials such as cemented carbide, achieving a machining accuracy of surface roughness Ra 0.003μm and contour accuracy of less than 0.1μm. "Small Diameter Cemented Carbide Cutting" allows for both "Convex Tip Shape Processing" and "Concave Tip Shape Processing," with a tip diameter of φ300μm and coaxiality of 1μm. 【Machining Technologies】 ■ Cutting Mirror Surface Processing - Mirror surface processing through cutting ■ Small Diameter Cemented Carbide Cutting - Machining of small diameter lens components through cutting ■ Ultra-Precision Fine Hole Processing - High-precision machining of small diameter holes *For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract
• Other contract services

We would like to introduce the side push type switches that we handle. Starting with the horizontal type "LS10 series," we also offer the "LS12 series" for various AV equipment. We provide compact and slim types, contributing to cost reduction and thinness of products. 【Features】 ■ Horizontal type ■ Compact and slim ■ Dustproof and waterproof structure (equivalent to IP67) ■ Can be mounted on a circuit board and used as a side push switch ■ Contributes to cost reduction and thinness of products *For more details, please visit our website or feel free to contact us.

• switch

We would like to introduce our surface-mounted mold type switches. Starting with the compact, slim, and high-feeling "LS38 series," we also offer the "LS39 series" and "LS220 series." We have a wide variety of switch heights and operating forces available, making them suitable for various devices. 【Features】 ■ Compact, slim, and high-feeling ■ Dustproof and waterproof structure (equivalent to IP67) ■ A rich variety of switch heights and operating forces ■ Usable for various devices *For more details, please visit our company website or feel free to contact us.

• switch

We would like to introduce our small and slim top-press type switches. These switches feature a dustproof and waterproof structure (equivalent to IP67) suitable for use in smartphones and portable devices. We offer a rich lineup including the ultra-compact "LS160 series," as well as the "LS129 series" and "LS155 series." The actuator mounted on the operating part provides a high click feel. 【Features】 ■ Compact and slim, high feeling ■ Dustproof and waterproof structure (equivalent to IP67) ■ With/without actuator ■ The actuator mounted on the operating part achieves a high click feel *For more details, please visit our website or feel free to contact us.

• switch