Ledestar 3535 LED Chip: 4-Color Beauty Series With 60° Lens

The market for aesthetic and therapeutic optoelectronic devices is undergoing a technological evolution. As demand for home-use beauty devices and professional-grade phototherapy equipment continues to rise, upstream LED light source manufacturers are accelerating their product development. Recently, Ledestar launched its 3535 LED chip 4-color beauty series-featuring a 60° lens-to provide a multi-wavelength integrated solution tailored for the beauty and physiotherapy equipment market.

2. 60° Lens Design: Irradiance and Thermal Dissipation Performance

The 60° beam angle is another key design highlight of this product. Beauty and physiotherapy devices have specific requirements regarding LED light emission angles. If the angle is too narrow, the light spot becomes overly concentrated, leading to issues such as excessive localized energy and insufficient energy in surrounding areas, which compromises the uniformity of large-area irradiation. Conversely, if the angle is too wide, energy disperses significantly, resulting in insufficient effective irradiance reaching the skin's surface; this necessitates an increased number of LED beads to compensate, thereby driving up the total cost of the device. The 60-degree lens strikes a balance between light spot coverage area and energy density. For mask-style products, this angle creates a sufficiently large light spot at close range while maintaining high surface irradiance; for devices positioned further from the skin-such as large LED panels-the 60-degree beam angle ensures effective energy coverage at reasonable operating distances.

Regarding thermal management, this series of LED chips utilizes ceramic substrate packaging. Compared to traditional EMC or PCT plastic lead frames, ceramic substrates offer thermal conductivity that is more than an order of magnitude higher, allowing for more efficient heat transfer from the chip junction to the PCB when driven by high currents. This is particularly critical for beauty devices, which are typically used for extended periods; inadequate heat dissipation not only accelerates light output degradation but can also cause excessive surface temperatures, compromising the user experience or even leading to low-temperature burns.

3. Lightweight, Bend-Resistant Lead Frame Suitable for Flexible Applications

The lead frame in this series features a lightweight, low-profile design while offering significant resistance to bending. This characteristic directly addresses the market for flexible beauty devices-such as therapeutic waist belts, flexible masks, and wearable phototherapy garments-where LEDs must withstand bending and deformation without suffering from solder joint failure or component malfunction.

Traditional LEDs with rigid lead frames are prone to solder pad cracking and poor electrical contact under bending stress. The lightweight, bend-resistant design, combined with suitable flexible FPC substrates, ensures stable operation even in applications requiring tight bending radii. This feature is highly practical for products like therapeutic waist belts that must conform to the contours of the human body.

4. Three Key Application Areas

In terms of product positioning, Ledstar's 3535 LED chip series with four-color lenses for beauty applications targets three main categories of devices.

LED beauty masks represent one of the fastest-growing segments in the home beauty device market. These products typically feature dozens to over a hundred densely arranged LED chips on a flexible or semi-rigid mask, delivering skincare benefits through a combination of multiple wavelengths. The 3535 LED chip features a balanced package size that ensures high per-unit power while allowing for high-density arrangement within a limited footprint; when paired with a 60-degree lens, it produces a relatively uniform light field at close range for facial applications. Its four-color integrated design enables manufacturers to achieve multi-wavelength functionality with fewer LEDs, thereby simplifying circuit design.

Large-format LED panels represent another typical application. Compared to face masks, these panels offer a larger illumination area and higher power output, making them suitable for full-body or half-body phototherapy. Such devices demand high consistency and long-term stability from the LEDs; the combination of Taiwanese chip technology and ceramic substrate packaging ensures superior reliability. The 60-degree beam angle is also well-suited for the operating distance of these panels, maintaining effective irradiance intensity at a range of several dozen centimeters.

Therapeutic belts represent the trend toward flexible, wearable phototherapy devices. Designed to wrap around areas such as the waist, shoulders, or knees, these products require LEDs that are both thin and resistant to bending. The thin, flexible, and durable bracket design of this Ledstar product was developed specifically for such applications. The inclusion of near-infrared wavelengths (such as 850nm) provides clear functional benefits for relieving muscle soreness and improving local blood circulation.