JP2988495B2 - Projection display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to the irradiating light of the light source to the light valve, relates to a projection display device that shows the table in a large screen a predetermined image by the light valve, speaking in detail further, incidence of the light valve to increase the utilization efficiency of light, so as to display images on the screen to more visible
And a projection type display device.

[0002]

2. Description of the Related Art Conventionally, in this type of projection display device, as shown in FIG. 3, for example, a light refractor 2 is provided on the incident light side of a light valve 1, and the light refractor 2 is composed of a plurality of convex lenses. 3.

That is , each of the light valves 1 is shielded.
It is partitioned by the light section 5 and selectively transmits incident light.
Many openings 4 are formed as pixels to be
The light incident on the light shielding portion 5 is guided to the opening 4 by the convex lens 3.
Light incident on the light shielding unit 5
The light is irradiated from the tube 1.

[0004]

By the way, the structure of the light refractor 2 does not cause any problem when applied to a direct-view display device, but when applied to a projection display device shown in FIG. 4, for example. There is a disadvantage that the light passing through the light valve 1 spreads before entering the projection lens 6.

That is, in the projection type display device , the light of the light source 7 is reflected by the reflecting mirror 8, and the reflected light and the light source 7 are reflected.
More direct light is condensed on the light refractor 2 by the condenser lens 9, and the light refracted by the light refractor 2 is applied to the light valve 1. Then, by projecting on the screen 10 the light passing through the light valve 1 in the projection lens 6, scree
The image formed by the light valve 1 is displayed on the screen 10 .

In this case, each convex lens 3 of the light refractor 2
The the light passing through reaches the projection lens 6 through the opening 4 of the light valve 1, as already described in FIG. 3, the same convex lens 3, the incident light in the vicinity of the optical unit 5 shielding of the light valve 1 is larger is refracted, it is irradiated to the opening 4.

For this reason, as shown in FIG. 4, the light passing through the light valve 1 spreads, and the projection lens 6
Since some of the light does not reach the above, the utilization efficiency of the incident light in the light valve 1 is reduced .

[0008] The present invention has been name of <br/> is to solve the above problems, it can be made incident on the effective projection lens the light which has passed through the light valve, the light utilization of the light source It is an object of the present invention to provide a projection display device capable of improving the rate.

[0009]

In order to achieve the above-mentioned object, the present invention provides a light-emitting device, comprising:
Having a large number of openings (pixels) for selectively transmitting light.
The light irradiated from the light source with respect to light valve, the light passing through the opening of the light valve through a projection lens projecting the scree <br/> down, the image formed by the light valve
When displaying on the screen,
Is assigned to each of the openings on the incident light side of the lube,
The light is irradiated to the light-shielding portions in the respective openings and the surrounding area.
Light including a large number of optical bodies for guiding the light toward the respective openings.
In formed by arranging the refractive member projection display device, each of
In the optical body, the emitted light passing through the optical body is aligned with the optical axis of the optical body.
So that it is guided to each of the openings as parallel light.
Therefore, the entrance surface side is a convex lens, and the exit surface side is a concave lens.
It is characterized by being.

According to this structure, the light valve is
Incident light that is refracted by the optical member, and is parallel to the optical axis in each optical member, in particular of the light valves, the incident light only in the respective openings except the optical unit shielding is irradiated Become .

Therefore, the projection type display device of the present invention has
In this case, the light condensed by the condenser lens is radiated to the light valve, and the light passing through this light valve is projected onto the screen by the projection lens. Most light contributes to the projection light of the screen from reaching it. This is because the light refracted by the light refractor is parallel to the optical axis of each optical body.

Thus, the utilization rate of the incident light in the light valve is maximized, that is, the light use efficiency of the light source of the projection display device can be improved. Also,
A condenser lens is provided between the light source and the light valve.
If the light refraction body as a whole is
It is preferable to bend convexly toward the side.
If the light collected by the condenser lens is not parallel,
The light refractor allows the light to be parallel to the optical axis.
Wear.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the drawings, the same parts as those in FIGS. 3 and 4 are denoted by the same reference numerals, and redundant description will be omitted.

In FIG. 1, a light refractor 11 is provided on the incident light side of the light valve 1, and the light refractor 11 is connected to each opening 4 of the light valve 1 from the light source side.
Not only the light emitted toward the
A plurality of optical bodies 12 having a convex lens on the entrance side and a concave lens on the exit side are formed continuously in order to guide the light irradiated toward a certain light shielding section 5 to each of the openings 4.

That is, the convex lens of each optical body 12 and
The concave lens not only irradiates the opening 4 with light,
The light emitted toward the light-shielding portion 5 is also incident on the opening 4.
And refracts each refracted light into the optical body 1
2 so as to be parallel to the optical axis of
Designed.

Next, a projection type display device using the light refractor 11 will be described with reference to FIG. 2. Light of the light source 7 and light reflected by the reflecting mirror 8 are condensed by the condensing lens 9, the light collected is incident on the light refractor 11.

Then, each optical body 12 of the light refractor 11 is
At, the incident light is refracted and made parallel to the optical axis of the optical body 12. Thus, as it is clear from FIG. 1, light refracted by the optical element 12 is irradiated only to the openings 4 of the light valve 1, the other shielding light portion 5 not irradiated.

Further, since the irradiation light of each of the openings 4 of the light valve 1 is parallel to the optical axis of each of the optical bodies 12 , most of the light passing through each of the openings 4 is <br>. The light enters the projection lens 6.

That is, unlike the conventional example, a part of the light passing through the light valve 1 does not come off the projection lens 6 and the light passing through the light valve 1 is effectively used. When a predetermined image is projected on 10,
Screen the projected image, the minute, the luminance becomes high.

According to this embodiment, the plurality of optical bodies 1
The light refractor 11 constituted by 2 is curved in a convex shape as a whole on the incident side, and the optical axis of each optical body 12 is respectively set with respect to the optical axis of the condenser lens 9 in accordance with this curve. It is at a predetermined angle. This is extremely effective when the light condensed by the condenser lens 9 is not parallel.

That is, since the light incident on each of the optical bodies 12 is made parallel to the optical axis of the optical body 12, the light condensed by the condensing lens 9 almost disappears from each opening 4 of the light valve 1. Only irradiated.

Further, since the light passing through each of the openings 4 is directed in the direction of the light condensed by the condenser lens 9, the condenser lens 9 and the projection lens 6 have a predetermined positional relationship. The utilization rate of incident light in the light valve 1 can be maximized, that is, the amount of incident light on the projection lens 6 can be maximized.

[0023]

As described above, according to the present invention,
The projection type display device which irradiates light from a light source to a light valve, projects light passing through an opening of the light valve onto a screen with a projection lens, and can display an image formed by the light valve. A light refracting body composed of a plurality of optical bodies for guiding light incident on each opening of the light valve and light incident on the light blocking part to the respective openings is provided on the incident side of In order to guide each light to the opening, the incident light side of the optical body is a convex lens,
And the outgoing light side and a concave lens, since the outgoing light of each optical member was parallel with the optical axis of the optical body, the incident light La light valve is irradiated only to the opening, and the light passing through the opening Since the light reaches the projection lens, the utilization rate of the incident light in the light valve can be maximized, and the light use efficiency of the light source of the projection display device can be improved, and the display image on the screen can be made brighter. There is an effect that can be.

[Brief description of the drawings]

FIG. 1 is a schematic partial side sectional view of a projection type display apparatus showing one embodiment of the present invention.

FIG. 2 is a schematic side view of the projection display device of the present invention.

FIG. 3 is a schematic partial side sectional view of a conventional projection display device.

FIG. 4 is a schematic side view of a conventional projection display device.

[Explanation of symbols]

1 light valve 4 opening (of the light valve 1) 5 shielding light portion (peripheral portion of the opening portion 4) 6 projection lens 7 source 9 converging lens 10 the screen 11 the light refractor 12 optical body (the light refractor 11)

Claims (2)

(57) [Claims] 1. A light-emitting device, comprising:
Having a large number of openings (pixels) for selectively transmitting light.
The light irradiated from the light source with respect to light valve, the light passing through the opening of the light valve through a projection lens projecting the scree <br/> down, the image formed by the light valve
When displaying on the screen,
Is assigned to each of the openings on the incident light side of the lube,
The light is irradiated to the light-shielding portions in the respective openings and the surrounding area.
Light including a large number of optical bodies for guiding the light toward the respective openings.
In the projection display device including the refractive body, each of the optical bodies has an output light passing through the optical body.
The light is guided to each of the openings as light parallel to the optical axis.
Therefore, the entrance surface side is a convex lens and the exit surface side is a concave lens.
Projection display device, characterized in that there is a's. 2. The light source according to claim 1 , wherein said light valve is a light valve.
When the optical lens is disposed, the light refractor
2. The projection type display device according to claim 1 , wherein the projection is curved convexly as a whole toward the condenser lens .