Unlock instant, AI-driven research and patent intelligence for your innovation.

Lens and illumination device

A lighting device and lens technology, which is applied to lighting devices, lighting device parts, lighting and heating equipment, etc., can solve the problems of small output and difficulty in obtaining uniform output of incandescent lamps.

Inactive Publication Date: 2012-09-05
HITACHI APPLIANCES INC
View PDF9 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since more light is emitted to the side, and the amount of light emitted to the front and rear is less, it is difficult to obtain the effect of uniformly emitting light in a roughly spherical shape required by an incandescent lamp substitute

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Lens and illumination device
  • Lens and illumination device
  • Lens and illumination device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In this embodiment, an example of a lens that prevents brightness unevenness and expands light distribution will be described.

[0036] figure 1 (a) is a cross-sectional view viewed from the side of the light emitting unit according to Example 1 of the present invention. The LED module 2 is mounted on one surface of the substrate 4 , and the light emitting surface 3 of the LED module 2 faces forward (upper) which is a direction opposite to the substrate 4 . In addition, the lens 1 is provided so that most of the lens 1 is located in front of (upper) the light emitting surface 3 of the LED module 2 . The substrate 4 is a component for mounting the LED module 2 . Electric power is supplied from the circuit to the LED module 2 , and light is irradiated from the light emitting surface 3 to the front (upper side) of the LED module 2 . The light irradiated from the light emitting surface 3 enters the lens 1 .

[0037] The lens 1 is arranged to cover the LED module 2 . I...

Embodiment 2

[0055] In this second embodiment, another embodiment of the first embodiment will be described. Figure 6 It is a cross-sectional view viewed from the side of the light emitting unit according to Example 2 of the present invention. The material and manufacturing method of the lens are the same as in Example 1. In addition, the flat portion a, the concave surface b, the refractive surface c, the curved surface d, and the curved surface e have the same configuration as the lens 1 of the first embodiment. In the lens 300 , a configuration different from that of the lens 1 is a truncated conical concave portion g provided on a surface opposite to the light emitting surface 3 of the LED module 2 . The concave part g has a side surface g1 and a bottom surface g2. The recess g has a truncated cone shape whose cross-sectional area decreases from the light emitting surface side to the front. The bottom surface g2 as a flat portion is provided on the opposite surface of the light emi...

Embodiment 3

[0057] In this third embodiment, another embodiment of the first embodiment will be described. Figure 7 (a) is a cross-sectional view viewed from the side of the light emitting unit according to Example 3 of the present invention. The material and manufacturing method of the lens are the same as in Example 1. In addition, the flat portion a, the concave surface b, the refractive surface c, the curved surface d, and the curved surface e have the same configuration as the lens 1 of the first embodiment. The lens 400 differs from the lens 100 in that it has a conical recess f on the surface facing the LED module 2 , and there are also a plurality of conical recesses h. By providing a plurality of conical recesses h, refraction occurs in the recesses h, and the uniformity of light hitting the funnel-shaped concave surface b is increased. As a result, the uniformity of light distribution becomes better. Figure 7 (b) shows an isometric view of the lens 400 . A plurality of coni...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a lens and an illumination device, and the lens and the illumination device are characterized in that, installation of an LED is simple and unevenness of light emergent brightness is prevented, and light is made to be uniformly emergent roughly in the shape of a spherical surface. The illumination device is provided with a substrate, an illuminant disposed at the upper side of the substrate, and a lens covering in the range above the side direction of the illuminant, wherein, the lens is provided with a face opposite to the light-emitting face of the illuminant, and a face concaving to the inner side of the lens at the opposite side of the face opposite to the light-emitting face of the illuminant, the face concaving to the inner side of the lens is provided with a function of making light incident from a curved face into the lens emergent to the upper part of the lens, and a function of making the light reflect to the side face and the lower part of the lens. A concave part is disposed on a part of the face opposite to the light-emitting face of the illuminant, and is a shape that makes the light incident from the concave part into the lens reflect more to the side face and the lower part of the lens than emergent to the upper part of the lens via a concave face.

Description

technical field [0001] The present invention relates to a lighting device, and more particularly to a lighting device that includes a semiconductor light emitting element such as an LED (light emitting diode) as a light source and is mainly used as a substitute for an incandescent lamp. Background technique [0002] In recent years, in order to prevent global warming and promote energy saving, in the field of lighting, research and development of lamps using LEDs have been carried out as substitutes for conventional incandescent lamps. This is because lamps using LEDs are energy efficient compared to existing incandescent lamps. In consideration of expansion of applications of lamps using LEDs, existing incandescent lamp sockets are required to be used as they are, and it is desired to use them on a par with existing incandescent lamps. In addition, since an incandescent lamp uniformly emits light in a substantially spherical shape from the front to the rear of the incandes...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): F21S2/00F21V5/04F21Y101/02
Inventor 饭塚亚纪子中里典生野村和男粟野孝司
Owner HITACHI APPLIANCES INC