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Optical sensors that reduce specular reflections

An optical sensor and optical sensing technology, applied in the field of optical sensors, can solve the problem that optical sensors are easily affected by mirror reflection, etc., and achieve the effects of simple cost-effectiveness, reduced sensitivity, and low cost

Inactive Publication Date: 2014-01-01
INTERSIL INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When such a cover is placed over an optical sensor, the optical sensor is often susceptible to specular reflections

Method used

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  • Optical sensors that reduce specular reflections
  • Optical sensors that reduce specular reflections
  • Optical sensors that reduce specular reflections

Examples

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Embodiment Construction

[0054] figure 1 is a top view of an optical sensing device 102 (eg, a proximity sensing device) according to certain embodiments of the invention. According to the first embodiment of the present invention, Figure 2A yes figure 1 side view of device 102, while Figure 2B yes figure 1 and Figure 2A The cross-sectional view of the device 102 (along figure 1 Dashed line B-B).

[0055] Such as figure 1 As shown, the optical sensing device 102 includes a die attach substrate 110, although in figure 1 A die-attached leadframe substrate is shown, but a circuit board substrate or a ceramic substrate could alternatively be, but is not limited to, this. The benefit of using one or more leadframes as the die attach substrate is that the leadframe substrate can typically be made thinner than the circuit board substrate or ceramic substrate, which can reduce the thickness of the overall device 102, depending on the device 102 being used. The use of may be desirable. For example...

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Abstract

An optical sensor device, according to an embodiment of the present invention, includes a light source and a light detector. The light source includes one or more light emitting elements, and the light detector includes one or more light detecting elements. A first opaque light barrier portion, between the light source and the light detector, is configured to block light from being transmitted directly from the light source to the light detector. A second opaque light barrier portion, extending from the first opaque light barrier portion in a direction towards the light source, is configured to reduce an amount of specular reflections that would occur if a light transmissive cover plate were placed over the optical sensor device. A third opaque light barrier portion, extending from the first light barrier portion in a direction towards to the light detector, is configured to reduce an amount of specular reflections that would be detected by the light detector, if a light transmissive cover plate were placed over the optical sensor device.

Description

[0001] priority statement [0002] This application claims priority from the following U.S. patent applications: [0003] US Provisional Patent Application No. 61 / 169,236, entitled "OPTICAL SENSORS AND METHODS FOR PROVIDING OPTICAL SENSORS", to Lynn K. Wiese et al., filed: April 2009 14th (Agency file number: ELAN-01227US0); [0004] US Provisional Patent Application No. 61 / 218,867, entitled OPTICAL SENSORS THAT REDUCE SPECULAR REFLECTIONS, to Lynn K. Wiese et al., filed: June 19, 2009 (Agency Docket No.: ELAN-01247US0); [0005] US Patent Application No. 12 / 499,693, entitled "OPTICAL SENSORS AND METHODS FOR PROVIDING OPTICAL SENSORS", to Lynn K. Wiese et al., filed: July 8, 2009 Day (Agency Docket No.: ELAN-01227US1); [0006] US Patent Application No. 12 / 499,723, entitled OPTICAL SENSORS THAT REDUCE SPECULAR REFLECTIONS, to Lynn K. Wiese et al., filed July 8, 2009 (Agency Docket No. : ELAN-01247US1); [0007] US Patent Application No. 12 / 643,831, entitled OPTICAL SENSORS...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/00G01N21/27
CPCH01L25/167H01L2924/3011H01L31/0232H01L2224/49171H01L31/02325H01L31/173H01L2224/48247H01L2924/00G01B11/026G01B11/14
Inventor L·K·维斯N·凯尔科V·帕特沃德哈
Owner INTERSIL INC
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