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

Illumination device and projector

A technology for lighting devices and projectors, applied in projection devices, optics, instruments, etc., can solve problems such as display shadows, darkening, and influences, and achieve the effects of reducing reflection, realizing cost reduction, and improving utilization efficiency

Inactive Publication Date: 2006-08-16
SEIKO EPSON CORP
View PDF1 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the conventional projector 1000a, there is a height difference S between the decentered first small lenses of the first lens array 130a (see Figure 9 (b))
Since the first small lens is conjugate to the illuminated area, the shadow or diffuse reflection caused by such a height difference S will significantly affect the illuminated area
In addition, due to the existence of the height difference S, the peripheral portion of the illuminated area often changes due to surface sagging (the corners of the peripheral edge of the lens are formed into a curved surface and do not form a predetermined angle) during the manufacture of the first lens array 130a. dark
The result is as Figure 10 As shown, there is a problem that a display shadow occurs on the peripheral portion of the display area

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
  • Illumination device and projector
  • Illumination device and projector
  • Illumination device and projector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] figure 1 It is a figure shown for demonstrating the illuminating device 100 and the projector 1000 of Example 1. As shown in FIG. figure 1 (a) is a diagram showing the optical system of the projector 1000, figure 1 (b) is a view of the translucent member 120 used in the projector 1000 viewed from above, figure 1 (c) is a side view of the translucent member 120 used in the projector 1000 .

[0066] figure 2 is a diagram shown for explaining the polarization conversion element 150 . figure 2 (a) is a view of a part of the polarization conversion element 150 viewed from above, figure 2 (b) is a perspective view of the polarization conversion element 150 .

[0067] image 3 It is a figure shown for demonstrating the effect of the lighting apparatus 100 of Example 1. FIG. image 3 (a) shows the image of the first small lens 132 on the light incident surface of the polarization conversion element 150 of the first embodiment, image 3 (b) shows an image of the f...

Embodiment 2

[0120] Figure 4 It is a figure shown for demonstrating the illumination device 100A and projector 1000A of Example 2. Figure 4 (a) is a diagram showing the optical system of the projector 1000A, Figure 4 (b) is a view of the translucent member 120 used in the projector 1000A viewed from above, Figure 4 (c) is a side view of the translucent member 120 used in the projector 1000A.

[0121] Although the lighting device 100A of the second embodiment basically has a configuration very similar to that of the lighting device 100 of the first embodiment, as Figure 4 As shown in (a), the configuration of the light source device is different from that of the lighting device 100 of the first embodiment.

[0122] That is to say, the lighting device 100A of the second embodiment uses a light source device 110A as a light source device, and the light source device 110A includes: an elliptical reflector 114A, and a light emitting tube 112A disposed near the first focal point of the e...

Embodiment 3

[0134] Figure 5 It is a figure shown for demonstrating the illuminating device 100B and projector 1000B of Example 3. Figure 5 (a) is a diagram showing the optical system of the projector 1000B, Figure 5 (b) is a view of the translucent member 120B used in the projector 1000B viewed from above, Figure 5 (c) is a side view of the translucent member 120B used in the projector 1000B.

[0135] The lighting device 100B of Embodiment 3, such as Figure 5 (a)~ Figure 5 As shown in (c), the configurations of the light source device, the polarization conversion element, and the translucent member are different from those of the lighting device 100A of the second embodiment.

[0136] That is to say, in the lighting device 100B of the third embodiment, as the light source device, the light source device 110B that emits a diffused illumination light beam toward the illuminated area side is used, and as the polarization conversion element, the range of the effective incidence part...

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

To provide an illumination device capable of improving light utilization efficiency and reducing cost furthermore in a projector. The illumination device includes a light source, a first lens array having a plurality of first small lenses, a second lens array having a plurality of second small lenses corresponding to the plurality of first small lenses, and a superimposing lens. Wherein the plurality of first small lenses is made eccentric in a certain direction while the plurality of second small lenses is made eccentric in one of the certain direction and a direction orthogonal to the certain direction. The first and second lens arrays are integrally formed into one light-transmissive member.

Description

technical field [0001] The present invention relates to lighting devices and projectors. Background technique [0002] Figure 9 It is a figure shown for demonstrating the conventional projector 1000a and the lighting device 100a. Figure 9 (a) shows the optical system of a conventional projector 1000a, Figure 9 (b) shows the main part of the lighting device 100a used in the conventional projector 1000a. [0003] Figure 10 It is a figure shown for explaining the display shadow of the conventional projector 1000a. [0004] Existing projector 1000a, such as Figure 9 As shown in (a), it is equipped with: an illuminating device 100a; a color separation and light guiding optical system 200 that separates the illuminating light beam from the illuminating device 100a into three kinds of colored light, red light, green light and blue light, and guides them to the area to be illuminated; Three liquid crystal devices 400R, 400G, and 400B for each illumination light beam from the ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/14G03B21/00G02B27/18
Inventor 秋山光一
Owner SEIKO EPSON CORP