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Light source device and projector

A technology of a light source device and a projector, which is applied in projection devices, image reproducers using projection devices, optics, etc., and can solve problems such as the size of the optical system becoming larger

Inactive Publication Date: 2009-09-30
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in the existing light source device 100, although the Figure 13 The shown dichroic mirror 103, LED101G 1 and LED101G 2 Installed near the liquid crystal light valve 102G to obtain high luminance in green light, but it is necessary to expand the arrangement of these dichroic mirrors 103 and LED 101G 1 and LED101G 2 space, so there is a problem that the size of the optical system becomes larger

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] figure 1 It is a plan view showing the structure of the light source device 200 according to the first embodiment of the present invention. This light source device 200 is used, for example, in a projector. In light source device 200, LED201R, LED201G 1 , LED201G 2 and LED201B are respectively arranged in the vicinity of the three sides of the cross dichroic prism 203 described later, and generate red light (hereinafter referred to as R light) and first green light (hereinafter referred to as G light) respectively. 1 light), the second green light (hereinafter referred to as G 2 Light) and blue light (hereinafter referred to as B light) solid light-emitting elements. Among them, R light, G 1 Light, G 2 light and b light as figure 2 Shown have different peak wavelengths λR, λG 1 , λG 2 and the spectrum of λB.

[0039] Thus, by using R light, G 1 Light, G 2 Light and B light, these 4 colors of light, such as image 3 As shown in the xy chromaticity diagram ...

Embodiment 2

[0051] In the above-mentioned embodiment 1, although the use of R light, G 1 Light, G 2 The example of the structure of the four kinds of colored light of light and B light has been described, but it can also be used as an example of adding a third green light (hereinafter referred to as G) to the above four kinds of colored light. 3 An example of the structure of the 5 shades of light). An example of such a structure will be described as Embodiment 2 below.

[0052] Figure 5 It is a plan view showing the structure of a light source device 300 according to Embodiment 2 of the present invention. The light source device 300 is used for, for example, a projector. In this figure, with figure 1 The corresponding parts of each part of the above are given the same reference numerals. In the light source device 300 shown in the figure, LED201G is added 3 , and set instead figure 1 The liquid crystal light valve 202RG shown in the liquid crystal light valve 202R 3 . LED201...

Embodiment 3

[0064] In the above-mentioned embodiment 2, although the use of R light, G 1 Light, G 2 Light, G 3 The example of the structure of the five shades of light and B light was described, but it can also be used as an example of removing G from the above five shades of light 2 An example of the structure of the 4 shades of light. An example of such a structure will be described as Embodiment 3 below.

[0065] Figure 9 It is a plan view showing the structure of a light source device 400 according to Embodiment 3 of the present invention. The light source device 400 is used for, for example, a projector. In this figure, with Figure 5 and figure 1 The corresponding parts of each part of the above are given the same reference numerals. In the light source device 400 shown in this figure, the Figure 5 LED201G shown 2 , and instead of Figure 5 The liquid crystal light valve 202BG shown 2 A liquid crystal light valve 202B is provided. The light valve 202B is arranged nea...

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Abstract

The invention relates to reducing an optical system in size while enlarging a color reproducible range and achieving higher luminance. A cross dichroic prism 203 to combine an R light, a G1 light, a G2 light, and a B light, and an LED 201R to generate the R light, an LED 201G1 to generate the G1 light, an LED 201G2 to generate the G2 light, and an LED 201B, disposed near the LED 201G2 to be side by side, to generate the B light, as well as a control portion to drive these LED 201R, LED 201G1, LED 201G2, and LED 201B under control are provided. The peak wavelengths of the G2 light and the B light are adjacent to each other, and the control portion drives the LED 201G2 and the LED 201B under its control by switching in time division.

Description

technical field [0001] The present invention relates to a light source device and a projector, and a specific object of the present invention is to provide a light source device and a projector capable of reducing the size of an optical system while expanding the color reproduction range and achieving high luminance. Background technique [0002] Conventionally, high luminance has been demanded for light source devices used in projectors. Therefore, a method for achieving high luminance by synthesizing light of two different wavelengths by using a dichroic mirror has been proposed conventionally (see Patent Document 1). Figure 13 It is a plan view showing the configuration of a conventional light source device 100 . This light source device 100 is applied to the above-mentioned method of achieving higher luminance, and is used, for example, in a projector. [0003] In this figure, LED101R, LED101G 1 , LED101G 2 and LED101B are respectively arranged in the vicinity of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/14G03B21/20H04N5/74H04N9/31G02F1/133G03B21/00G09G3/20G09G3/34G09G3/36
CPCG03B21/2033H04N9/3197G03B21/2053G03B21/2013H04N9/3117H04N9/3155H04N9/312H04N9/3164H04N9/315G03B21/14
Inventor 坂田秀文米窪政敏
Owner SEIKO EPSON CORP
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