ROHM Launches High Output Lens LEDs to Solve Light Leakage Problem of Instrument Clusters

Japan-based ROHM Semiconductor announced its new lens LED products with compact high output. This new lineup includes 18 devices, comprised of the CSL0901 series featuring standard brightness and the high brightness CSL0902 series.

Recently, most vehicle instrument cluster designs have adopted shields to prevent light leakage from the LEDs to surrounding areas. However, light leakage remains a challenge due to a small amount of space that is required between the shield and the PCB to account for expansion caused by temperature changes. Additionally, high reliability is required for LEDs they may be exposed to sever conditions with applications such as automotive and industrial systems.


(Image: ROHM)

To tackle the problem, ROHM developed products targeting applications that require high reliability at the component level. The newest series consists of automotive-grade products that ensure high reliability in vehicle instrument clusters which operate under harsh environments. Raising the light source position from 0.18mm in standard products to 0.49mm allowed ROHM to significantly reduce light leakage.

ROHM also developed a new type of resin for blue, green and white LEDs to achieve higher reliability. As a result, all devices are designed to prevent light degradation even under high temperature environments.

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