Mr. Zhibin Zheng Profile

Zhibin Zheng

at Changshu Institute of Technology

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 24 November 2021 Paper

Thermal resistance and optical performance of SMD LEDs with traditional package and chip scale package

Yiyi Lou, Weixiang Huang, Zhibin Zheng, Shuchang Wang, Zhijiang Sun

Proceedings Volume 12066, 120660G (2021) https://doi.org/10.1117/12.2603562

Read Abstract +

Light-emitting diodes (LEDs) have been widely used in many fields. As a new packaging form, LED with chips scale package (CSP) has received more and more attention. The heat dissipation of LED devices is the main problem that restricts the application of LED, especially for 2835 Surface Mounted Devices（SMD）LEDs. In this paper, traditional packaging and CSP packaging methods have been used in 2835 SMD LEDs, and the changes of thermal resistance, spectrum, color temperature and color coordinates of the samples under different temperature and current have been studied. The thermal resistance results indicate that the 2835 SMD LEDs with CSP package has better temperature and current stability than that with traditional package. The 2835 SMD LEDs with CSP package have better spectral integrity at different current and temperature condition. The color temperature of the two samples almost changes linearly with increasing current or temperature. The result indicates that the blue light emission from the blue LED chip increases with current increase, which leads to shifting in the chromaticity coordinates to the blue portion in the chromaticity diagram that known as a blue shift mechanism for 2835 SMD LEDs with traditional package. On the contrary, the chromaticity coordinate X of 2835 SMD LEDs with CSP package have increased, which mainly attributed to the reduction of photon reabsorption. The long wavelength phosphor stimulated by more blue light as well as purple light with increasing intensity of current, so the color coordinates moved to the red region.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years