Perceived brightness of LED projector

Shih Fang Liao; Hung Yu Chou; Tsung Hsun Yang; Cheng Chung Lee; Kirk Chang

doi:10.1889/1.3256758

Perceived brightness of LED projector

Shih Fang Liao, Hung Yu Chou, Tsung Hsun Yang, Cheng Chung Lee, Kirk Chang

Department of Optics and Photonics

Research output: Contribution to journal › Conference article › peer-review

21 Scopus citations

Abstract

It is commonly observed that the LED projectors can provide with more perceived brightness by less stimulus luminance. In this work, the Helmholtz-Kohlrausch effect is applied for studying the enhanced perceived brightness of the LED projector. According to the equations developed by Nayatani’s group, the ratio of the enhanced perceived brightness of LED projector is evaluated as 25% to 30% as compared to traditional lamp projector in dark environment. However, in the normal office illumination level, the difference between the LED projector and the lamp projector diminishes.

Original language	English
Pages (from-to)	262-264
Number of pages	3
Journal	Digest of Technical Papers - SID International Symposium
Volume	40
Issue number	1
DOIs	https://doi.org/10.1889/1.3256758
State	Published - 2009
Event	2009 Vehicles and Photons Symposium - Dearborn, MI, United States Duration: 15 Oct 2009 → 16 Oct 2009

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abstract = "It is commonly observed that the LED projectors can provide with more perceived brightness by less stimulus luminance. In this work, the Helmholtz-Kohlrausch effect is applied for studying the enhanced perceived brightness of the LED projector. According to the equations developed by Nayatani{\textquoteright}s group, the ratio of the enhanced perceived brightness of LED projector is evaluated as 25% to 30% as compared to traditional lamp projector in dark environment. However, in the normal office illumination level, the difference between the LED projector and the lamp projector diminishes.",

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AB - It is commonly observed that the LED projectors can provide with more perceived brightness by less stimulus luminance. In this work, the Helmholtz-Kohlrausch effect is applied for studying the enhanced perceived brightness of the LED projector. According to the equations developed by Nayatani’s group, the ratio of the enhanced perceived brightness of LED projector is evaluated as 25% to 30% as compared to traditional lamp projector in dark environment. However, in the normal office illumination level, the difference between the LED projector and the lamp projector diminishes.

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Perceived brightness of LED projector

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