Semiconductor lamp and light bulb type LED lamp

• US 8,506,103 B2
• Filed: 06/02/2011
• Issued: 08/13/2013
• Est. Priority Date: 11/26/2008
• Status: Expired due to Fees

• Current Assignee: Hideki Iimura, Keiji Iimura
• Original Assignee: Hideki Iimura, Keiji Iimura
• Inventors: Iimura, Keiji, IIMURA, Hideki
• Primary Examiner(s): TSO, LAURA K
• Application Number:
  US13/134,192
• Publication Number:
  US 20110286200A1
• Time in Patent Office: 803 Days
• Field of Search: 362/84, 362/311.02, 362/254
• US Class Current: 362/84
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21K 9/27 Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes
• CPC Class Codes: F21K 9/61 using light guides
• CPC Class Codes: F21K 9/64 using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
• CPC Class Codes: F21V 13/08 the elements being filters or photoluminescent elements and reflectors
• CPC Class Codes: F21V 3/049 Patterns or structured surfaces for diffusing light, e.g. frosted surfaces
• CPC Class Codes: F21V 3/061 the material being glass
• CPC Class Codes: F21V 3/062 the material being plastics
• CPC Class Codes: F21V 3/08 the material comprising photoluminescent substances
• CPC Class Codes: F21V 3/12 the coatings comprising photoluminescent substances
• CPC Class Codes: F21V 5/041 Ball lenses
• CPC Class Codes: F21V 7/041 with conical or pyramidal surface
• CPC Class Codes: F21V 9/38 Combination of two or more photoluminescent elements of different materials
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2107/30 on the outer surface of cylindrical surfaces, e.g. rod-shaped supports having a circular or a polygonal cross section
• CPC Class Codes: F21Y 2107/90 on two opposite sides of supports or substrates
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

The disclosed is an LED lamp comprising: a light transmitting globe/envelope having a plurality of fluorescent protrusions, fibers and/or grooves containing a phosphor; a light unit having a circuit board and one or more light emitting diode (LED/LEDs) mounted on the circuit board for emitting a short wavelength primary light for directing to the fluorescent protrusions, fibers and/or grooves to convert the primary light into visible secondary light. A light bulb type LED lamp is composed of the above LED lamp, a lighting circuit to drive the LED/LEDs and a light bulb type power supply connector (Edison screw base), thereby the LED lamp being compatible with an incandescent light bulb. This LED lamp irradiates illumination light having a high brightness and luminance, a wide light distribution angle and non-glare fluorescent illumination.

Claims

1. A semiconductor lamp comprising:

a light transmitting envelope having a plurality of fluorescent elements containing a phosphor disposed thereon;

at least one semiconductor light emitting element for emitting a short wavelength light for directing to the fluorescent elements; and

wherein the fluorescent elements comprise one of protrusions and grooves.

2. The semiconductor lamp according to claim 1,

wherein the fluorescent elements are formed on an inner surface of the light transmitting envelope, and

wherein the short wavelength light from the semiconductor light emitting element directs to the fluorescent elements to convert the light into visible light.

3. The semiconductor lamp according to claim 1, wherein the phosphor is a yellow phosphor which converts one of blue and purple light of the short wavelength light into yellow color light.

4. The semiconductor lamp according to claim 1, wherein the phosphor is three primary color phosphors which converts one of UV and purple light of the short wavelength light into a white light including three primary colors.

5. The semiconductor lamp according to claim 1,

wherein each of the protrusions comprises a fluorescent fiber having one of a core and a core covered by a dad, and

wherein one of the core and the clad contains the phosphor.

6. The semiconductor lamp according to claim 1, further comprising a light unit composed of a circuit board for mounting the at least one semiconductor light emitting element being one of light emitting diode/diodes (LED/LEDs) and laser diode/diodes (LD/LDs).

7. The semiconductor lamp according to claim 1, wherein the light transmitting envelope comprises dual segments which are coupled together to construct a single envelope having an inner cavity to accommodate the at least one semiconductor light emitting element.

8. The semiconductor lamp according to claim 1, further comprising:

a light unit having a dual sided circuit board having dual mounting surfaces and the at least one semiconductor light emitting element mounted on each of the dual mounting surfaces, and

wherein the light unit is accommodated in a substantially middle position of an inner cavity of the envelope for irradiating all inner surface of the envelope.

9. The semiconductor lamp according to claim 8, further comprising a conic reflector positioned to face one surface of the dual sided circuit board.

10. The semiconductor lamp according to claim 1, further comprising:

a light unit composed of a circuit board and the at least one semiconductor light emitting element mounted thereon, and

wherein the light unit is supported by the envelope.

11. The semiconductor lamp according to claim 1, further comprising:

a light unit composed of a circuit board and the at least one semiconductor light emitting element mounted thereon, and

wherein the light unit is supported by a supporting member extending from a bottom of the envelope.

12. The semiconductor lamp according to claim 1, further comprises one of fluorescent film and layer containing the phosphor formed on an inner surface of the envelope.

13. The semiconductor lamp according to claim 1, further comprises at least one leaky light guide member with one of linear and curved shape, having a proximate end to receive the short wavelength light and a side leaky surface to leak the short wavelength light.

14. The semiconductor lamp according to claim 1, further comprises a linear light guide member and one of light direction changing means and light spreading member,

wherein the linear light guide member is composed of a proximate end, a side surface and a distal end, and

wherein the one of light direction changing means and light spreading member is located on the distal end.

15. The semiconductor lamp according to claim 1,

wherein one of reflector and mirror and the at least one semiconductor light emitting element are accommodated in an inner cavity within the light transmitting envelope, and

wherein the one of reflector and mirror is located at a middle position of the inner cavity and the semiconductor light emitting element is located at one end of the inner cavity.

16. The semiconductor lamp according to claim 1, further comprises one of polygonal and wing like supporting members having plural surfaces, and

wherein a plurality of circuit boards to mount the at least one semiconductor light emitting element are fixed on the surfaces.

17. An LED lamp comprising:

a light transmitting envelope having a plurality of fluorescent elements containing a phosphor;

a light unit having a circuit board and at least one light emitting diode (LED/LEDs) mounted on the circuit board for emitting a short wavelength light for directing to the fluorescent elements to convert the short wavelength light into visible light;

wherein the fluorescent elements comprise one of protrusions and grooves; and

wherein the light unit is accommodated in an inner cavity of the light transmitting envelope.

18. The LED lamp according to claim 17,

wherein the LED lamp is a linear LED lamp comprising:

the light transmitting envelope having a light transmitting tubular member, the light unit having a linear supporting member and at least one linear LED array fixed on the linear supporting member; and

wherein the light unit is arranged along the inner cavity of the tubular member.

19. A light bulb type LED lamp comprising:

a light transmitting globe having a plurality of the fluorescent elements containing a phosphor;

a light unit having a circuit board and at least one light emitting diode (LED/LEDs) mounted on the circuit board for emitting a short wavelength light for directing to the fluorescent elements to convert the short wavelength light into visible light, wherein the fluorescent elements comprise one of protrusions and grooves;

a lighting circuit to drive the LED/LEDs; and

a light bulb type power supply connector;

thereby the LED lamp can replace an incandescent light bulb.

20. The light bulb type LED lamp according to claim 19,

wherein each of the protrusions comprises a fluorescent fiber having one of a core and a core covered by a dad, and

wherein the one of the core and the clad contains the phosphor.