KR20160144735A - Optical engine appratus and compose/homogenizing prism - Google Patents

Abstract

According to the present invention, disclosed is a technology which can both achieve size miniaturization of an optical engine and improvement in optical efficiency by applying an optical component which can perform a synthesizing function to synthesize a plurality of laser beams with one path in a projection display apparatus and a homogenizing function to uniformly disperse the laser beam synthesized with one path at the same time.

Description

[0001] OPTICAL ENGINE APPARATUS AND COMPOSE / HOMOGENIZING PRISM [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projection display technology using a laser light source, and more particularly, to a projection display apparatus using a laser light source, a synthesizing function of synthesizing a plurality of laser beams in one path, (Homogenizing) which can diffuse the light emitted from the light source in the optical axis direction by using the optical component capable of simultaneously achieving the size reduction of the optical engine and the improvement of the optical efficiency.

As the demand for display on a high quality large screen increases, projection display devices such as a projector and a projection TV for high-quality or large-screen realization are being developed. Recently, efforts have been made to develop a projection display device into a compact size.

In order to develop such an ultra-small projection display device, development of an optical engine with improved optical efficiency to the smallest possible size will be the most important task.

In particular, the laser light source can improve the output in the same area, unlike the LED light source, which is proportional to the output and the area. Therefore, in order to develop an ultra-small projection display device, it is necessary to use a laser light source in an optical engine.

When an R, G, B laser light source is used in an optical engine for an ultra-small projection display device, in order to synthesize R, G, B laser beams emitted from each of the R, , G, and B laser light sources, a dichroic filter is used.

However, since each of the color selection filters for R, G, and B laser light sources can not transmit light (laser beam) from the bonded surface bonded for fixation, the laser beam incident on the color- There is a drawback in that it is necessary to make the size of the color-separating filter large in consideration of the fact that the effective area of the color filter may be reduced or the size of the optical engine may be restricted.

On the other hand, in an optical engine, an integrator such as a microlens array (MLA or FEL) or a light tunnel is essential for uniformly illuminating light emitted from each light source on a display panel, When a laser light source is used for miniaturization, a beam homogenizer for uniformly entering the laser beam emitted to the Gaussian into the integrator is further required. Such a beam homogenizer may be implemented through a microlens array or diffuser plate.

However, when the beam homogenizer is additionally used, the distance between the beam homogenizer and the integrator must be sufficiently secured so that the laser beam incident on the integrator has a sufficient effective diameter. Therefore, .

Further, when a beam homogenizer is additionally used, unintentional scattering and polarization loss occur due to an optical component (for example, a microlens array or a diffusion plate) that implements a beam homogenizer, .

Therefore, in the present invention, by adopting the optical component capable of simultaneously performing the combining function of the color selecting filter for combining the R, G, B laser beams in one path and the equalizing function of the beam homogenizer, And to improve the optical efficiency.

The object of the present invention is to provide a projection display apparatus using a laser light source capable of simultaneously performing a synthesis function of a color selection filter and a uniformization function of a beam homogenizer And an optical engine device capable of achieving both size reduction and optical efficiency improvement by using an optical component.

According to a first aspect of the present invention, there is provided an optical engine apparatus comprising: a plurality of laser light sources having different wavelengths; A synthesizing function for synthesizing a plurality of laser beams emitted from the plurality of laser light sources in one path and a synthesizing / equalizing prism for integrally implementing a first order smoothing function for uniformly diffusing the laser beam synthesized in the one path; And an integrator for uniformly diffusing the laser beam emitted from the synthesizing / equalizing prism and delivering the laser beam to the display panel.

Preferably, at least one or more color-discriminating component coating surfaces for reflecting or transmitting at least one of the plurality of laser beams incident on the synthesizing / equalizing prism according to color and transmitting to the emitting surface of the synthesizing / equalizing prism are formed And the combining function may be realized by the at least one color discriminating component coating surface formed in the synthesizing / equalizing prism.

Preferably, the combining / homogenizing prism is configured such that, based on the incident angle at which each of the plurality of laser beams is incident on the combining / homogenizing prism and the internal refractive index of the combining / homogenizing prism, And the first-order smoothing function can be realized by the specific structure of the synthesizing / equalizing prism.

Preferably, the laser beam emitted from the laser light source is different in the vertical and horizontal emission angles, and the optical engine device is arranged between the plurality of laser light sources and the synthesizing / equalizing prism, And a lens for adjusting the vertical and horizontal radiation angles of the laser beams to be radiated separately so as to be equal to each other.

Preferably, the lens may have a curvature only in a direction in which the radiation angle is larger in the vertical direction and the horizontal direction of the laser beam, for each of the plurality of laser light sources.

Preferably, each of the plurality of laser beams may further include a diffusing plate for diffusing a laser beam on each incident surface to which the synthesizing / equalizing prism is incident.

Preferably, the collimator further includes a collimator for collimating a laser beam passing through the combining / homogenizing prism and emitted to the emitting surface according to an acceptable incident angle of the integrator, on the emitting surface of the combining / equalizing prism .

According to a second aspect of the present invention, there is provided a composite / homogenizing prism comprising: an incident surface on which a plurality of laser beams having different wavelengths are incident; At least one color selection component coating surface for reflecting or transmitting at least one of the plurality of incident laser beams according to color and transmitting the plurality of laser beams to one emission surface; And an internal total internal reflection component which totally reflects the plurality of laser beams incident on the incident surface and transmitted to the emitting surface, based on the incident angle and the internal refractive index at which the plurality of laser beams are incident.

Thus, according to the optical engine device of the present invention, an optical component capable of simultaneously performing a combining function of combining a plurality of laser beams in one path and a uniformizing function of uniformly diffusing a laser beam synthesized in one path is adopted Thus, the effect of achieving both reduction in size and improvement in optical efficiency is derived.

1 is a configuration diagram showing a schematic configuration of a conventional projection display device (optical engine).
FIG. 2 is a schematic view showing a schematic configuration of an optical engine apparatus according to a preferred embodiment of the present invention.
3 is an exemplary diagram showing the principle of the synthesis function in the synthesis / homogenizing prism employed in the present invention.
FIG. 4 is an exemplary diagram showing a situation in which total internal reflection occurs in the synthesis / homogenizing prism employed in the present invention.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

First, before describing the present invention in detail, a schematic configuration of an existing projection display apparatus will be described with reference to FIG.

The present invention relates to a projection display apparatus using a laser light source, and therefore, a laser light source is also used to describe an existing projection display apparatus.

1, a conventional optical engine includes a plurality of laser light sources having different wavelengths, that is, an R laser light source R, a G laser light source G, and a B laser light source B ) Is used.

In order to synthesize the R, G and B laser beams emitted from the R, G and B laser light sources (R, G and B) in one path, the conventional optical engine uses R, G and B laser light sources Dichroic filters (4, 5, 6) are used for R, G, and B, respectively.

The R laser beam emitted from the R laser light source R is incident on the color separation filter 4 through the collimator 1 and the G laser beam emitted from the G laser light source G is collimated by the collimator 2 And the B laser beam emitted from the B laser light source B is made incident on the color separation filter 6 via the collimator 3. The color separation filter 6 receives the B laser beam emitted from the B laser light source B,

At this time, in the conventional optical engine, the collimators (1, 2, 3) are generally spherical collimator lenses.

The color selection filters 4, 5, and 6 selectively reflect or transmit the laser beam according to the color (wavelength) of light (laser beam).

The color selection filter 6 reflects the B laser beam and enters the color separation filter 5. The color separation filter 5 reflects the G laser beam and transmits the B laser beam to the color separation filter 4, And the color selection filter 4 combines the R, G, and B laser beams into one path by reflecting the G and B laser beams and transmitting the R laser beams, and enters into a beam homogenizer 7 .

In an optical engine, an integrator such as a microlens array (MLA or FEL) or a light tunnel is necessary to uniformly illuminate the light (beam) emitted from each light source on the display panel. Such an integrator is shown as an integrator 9 in the existing optical engine shown in Fig.

On the other hand, when a laser light source (for example, R, G, B) is used for miniaturization in the optical engine, a beam homogenizer 7 for uniformly entering the laser beam, which is radiated to Gaussian, into the integrator 9, Is further required. This beam homogenizer 7 can be realized through a microlens array or a diffuser plate.

The RGB laser beam synthesized by the color separation filters 4, 5 and 6 is uniformly diffused through the beam homogenizer 7 and then reflected by the mirror 8 to be reflected by the integrator 9 ).

The RGB laser beam incident on the integrator 9 is incident on the polarization beam splitter 20 via the field lens 10.

Although not shown in FIG. 1, a collimator may be further provided at the front end of the integrator 9, and a plurality of field lenses 10 at the rear end of the integrator 9 may be formed.

The polarizing beam splitter 20 converts the direction of the incident RGB laser beam and transmits the converted RGB laser beam to the display panel 22. The display panel 22 generates an image based on the transmitted RGB laser beam and outputs the image to the projection optical system 30 .

Although not shown in FIG. 1, a phase plate (Retarder) may be additionally provided at the front end of the display panel 22.

The display panel 22 may be a liquid crystal on silicon (LCoS) panel as a reflection type panel, or may be a liquid crystal display (LCD) panel as a transmission type panel or a DMD (Digital Micromirror Device) In this case, the optical components at the front end and / or the rear end of the display panel 22 may be different from those shown in Fig.

The projection optical system 30 is configured to project an image transmitted from the display panel 22, which is composed of a plurality of lenses (not shown), and projects the image projected from the projection optical system 30 onto a screen (not shown) It is expressed and the person is recognized by the naked eye.

1, since the radiation angles of the R, G, and B laser light sources R, G, and B are small in the conventional optical engine using the laser light source, the RGB laser beam is emitted to the display panel 22, The integrator 9 and the beam homogenizer 7 are used in combination for uniform illumination.

Therefore, in the conventional optical engine, the RGB laser beam emitted from the R, G, and B laser light sources R, G, and B and synthesized into one is firstly uniformed and diffused in the beam homogenizer 7, And is transmitted to the display panel 22 after being homogenized and diffused in the light guide plate 9 by a second order.

However, in the conventional optical engine, since the distance between the beam homogenizer 7 and the integrator 9 should be sufficiently secured so that the RGB laser beam incident on the integrator 9 has a sufficient effective diameter, There is a disadvantage that it is restricted in downsizing of the engine.

In addition, in the conventional optical engine, unintentional scattering, polarization loss, and the like occur due to an optical component (for example, a microlens array or diffusion plate) that implements the beam homogenizer 7, .

On the other hand, since the color discrimination filters 4, 5, and 6 can not transmit light (laser beam) from the bonded surfaces bonded for fixation, the color discrimination filters 4, There is a disadvantage that the size of the color selection filter must be made large considering that the area may be reduced or the size of the optical engine may be restricted.

Therefore, in the present invention, by adopting the optical component capable of simultaneously performing the combining function of the color selection filters (4, 5, 6) and the beam homogenizer (7), it is possible to reduce the size of the optical engine and the optical efficiency We will propose a plan to achieve all of these improvements.

Hereinafter, an optical engine device according to a preferred embodiment of the present invention will be described in detail with reference to FIG.

In FIG. 2, for convenience of explanation, the same optical components as those of the conventional optical engine will be described with reference to the same reference numerals.

The optical engine device according to the present invention is characterized by including a plurality of laser light sources having different wavelengths, a combining function of combining a plurality of laser beams emitted from the plurality of laser light sources into one path, Uniformization prism 50 for uniformly diffusing the laser beam emitted from the synthesizing / equalizing prism 50 and a laser beam for uniformly diffusing the laser beam emitted from the synthesizing / equalizing prism 50 and transmitting the same to the display panel 22 And an integrator (9).

In the optical engine device of the present invention, a plurality of laser light sources, for example, an R laser light source R, a G laser light source G, and a B laser light source B can be used as shown in FIG.

Hereinafter, for convenience of explanation, the R, G, and B laser light sources (R, G, and B) will be described as a plurality of laser light sources.

2, the R laser light source R among the plurality of laser light sources is located on the opposite surface to the emission surface of the combining / equalizing prism 50, and the G laser light source G and the B laser light source (B) may be located at one of the side surfaces in contact with the exit surface of the synthesizing / equalizing prism (50).

Of course, the positions of the R, G, and B laser light sources R, G, and B shown in FIG. 2 are only one embodiment, and need not be limited to the positions shown in FIG.

The synthesizing / equalizing prism 50 has a combining function of combining the R, G and B laser beams emitted from the R, G and B laser light sources R, G and B into one path, The first uniformization function for uniformly diffusing the beam, that is, the RGB laser beam, is integrally implemented.

That is, the synthesizing / equalizing prism 50 is provided so as to simultaneously perform the combining function of the color discriminating filters 4, 5, 6 and the (first order) equalizing function of the beam homogenizer 7 in the existing optical engine, And corresponds to the optical component proposed in the present invention.

Hereinafter, the combining / equalizing prism 50 will be described in more detail.

The synthesizing / equalizing prism 50 reflects or transmits each of the R, G, B laser beams incident on the synthesizing / equalizing prism 50 in accordance with the color and transmits it to the emission surface of the synthesizing / equalizing prism 50 At least one or more component coating surfaces are formed.

In the case of FIG. 2, it can be seen that two color separation component coating surfaces 52 and 54 are formed in the synthesizing / equalizing prism 50.

Thus, the composite function of the synthesizing / equalizing prism 50 can be implemented by the at least one or more color selective component coating surfaces or two color selective component coating surfaces 52, 54 formed in the synthesizing / equalizing prism 5 have.

More specifically, the color-discriminating component coating surfaces 52 and 54 selectively reflect or transmit the laser beam according to the color (wavelength) of light (laser beam).

3, if the color (wavelength) of the R laser beam is defined as WL1, the color (wavelength) of the G laser beam is defined as WL2, and the color (wavelength) of the B laser beam is defined as WL3, The coating surface 52 is configured to transmit WL1 and reflect WL2, and the color separation component coating surface 54 is formed to transmit WL1,2 and to reflect WL3.

Thus, when the R laser beam is incident on the opposed surface opposed to the exit surface of the synthesizing / equalizing prism 50, the R laser beam transmits both the color separation component coating surface 52 and the color separation component coating surface 54 Will be emitted to the exit surface of the synthesizing / equalizing prism 50. At this time, from the viewpoint of the R laser beam, the facing surface opposed to the emitting surface of the combining / homogenizing prism 50 will be the incident surface immediately.

When the G laser beam is incident on the side surface of the synthesizing / equalizing prism 50 that is in contact with the exit surface, the G laser beam is reflected by the color separation component coating surface 52 and is incident on the color separation component coating surface 54 And will be emitted to the exit surface of the composite / homogenizing prism 50 after passing through the after-color separating component coating surface 54. At this time, from the viewpoint of the G laser beam, the side surface of the combining / equalizing prism 50 that is in contact with the emitting surface will be the incident surface.

Then, when the B laser beam is incident on the side surface of the combining / equalizing prism 50 that is in contact with the emitting surface, the B laser beam is reflected by the color separating component coating surface 54 to be the emission surface of the combining / Will be released. At this time, from the viewpoint of the B laser beam, the side surface of the combining / equalizing prism 50 that is in contact with the emitting surface will be the incident surface.

As described above, the synthesizing / equalizing prism 50 is formed by the color separating component coating surfaces 52 and 54 formed on the combining / homogenizing prism 50, By combining the R, G, and B laser beams in one path, the synthesizing function is realized, and the RGB laser beam synthesized in one can be emitted by the synthesizing function.

2 and 3, the two color separating component coating surfaces 52 and 54 are formed on the synthesizing / equalizing prism 50, but this is only an embodiment. That is, in the present invention, the R, G, and B laser light sources R, G, and B are positioned on any side of the synthesizing / equalizing prism 50 to emit laser beams, Various forms of forming one or three or more color selective component coating surfaces so that the B laser beam can be synthesized in one path will be possible.

The synthesizing / equalizing prism 50 is configured so that the plurality of laser beams, that is, the R, G, and B laser beams are incident on the combining / equalizing prism 50 and the internal refractive index of the combining / And an internal total internal reflection component that is incident on each of the incident surfaces and totally reflects the R, G, and B laser beams transmitted to the exit surface, that is, a specific structure.

The total internal reflection component or specific structure that causes the R, G, and B laser beams to be totally reflected within the combining / equalizing prism 50 refers to a structure in which the width (width) and the height ) And an internal refractive index.

Than Referring to FIG 4, the condition of total reflection, the light and the (laser beam) must be wheat than the medium be the incident is in progress and the medium, the angle of incidence (θ _i) is the critical angle (θ _n) of the light (laser beam) Must be equal to or greater than (θ _i ≥ θ _n ).

Here, when the medium of the synthesizing / equalizing prism 50 is made to be tighter than the medium of air and the incident angles? _I of the R, G and B laser beams incident on the combining / equalizing prism 50 are R and G G, and B laser light sources R, G, and B and the synthesizing / equalizing prism 50, the R, G, and B laser light sources R, G, G, and B laser beams can be totally reflected within the combining / equalizing prism 50 only when the incident angle? _I of each of the G, B laser beams satisfies the following condition.

θ _i ≤ π / 2-sin ^-1 (1 / n)

In this case, when the refractive index of air is assumed to be 1, n means the internal refractive index of the combining / homogenizing prism 50.

And, the above-mentioned conditions is, total reflection condition (θ _i θ ≥ _n), the critical angle (θ _n) conditions to define the history of the function ^{_{(θ n = sin -1 (1}} / n)) and the critical angle (θ _n) As a condition derived from the range, it can be regarded as a general condition in the total reflection principle.

Thus, R, G, when seen that fixing that fixed to the structure, each of the angle of incidence (θ _i), B laser beams, R, G, a B laser beams is checked, the history that the total reflection at the inner synthesis / uniform prism 50 (Width) and height (length) of the combining / homogenizing prism 50 depending on the critical angle? _N defined by the function and the internal refractive index n.

Thus, the synthesizing / equalizing prism 50 is arranged such that each of the R, G, B laser beams incident on the combining / equalizing prism 50 is irradiated with at least one of the color selecting component coating surface 52 and the color selecting component coating surface 54 Uniformizing prism 50, the R / G / B laser beam is refracted by the combining / homogenizing prism 50 and does not exit out of the combining / homogenizing prism 50 during the process of being transmitted and / (Width), height (length), and internal refractive index (n), so that the light is totally reflected within the light guide plate 50.

The primary equalizing function of the combining / equalizing prism 50 can be realized by the above-described specific structure of the combining / equalizing prism 50, that is, by the width (width), the height (length) and the internal refractive index n have.

As described above, the synthesizing / equalizing prism 50 realizes a first-order smoothing function for uniformly diffusing the RGB laser beam synthesized in one path by the above-described specific structure of the synthesizing / equalizing prism 50, The RGB laser beam can be emitted in a form sufficiently diffused by the primary smoothing function.

Thus, the RGB laser beam emitted from the combining / equalizing prism 50 will be reflected by the mirror 8 and be incident on the integrator 9.

The RGB laser beam incident on the integrator 9 is incident on the polarization beam splitter 20 via the field lens 10 and the polarizing beam splitter 20 converts the direction of the incoming RGB laser beam, Panel 22, and the display panel 22 generates an image based on the transmitted RGB laser beam and transmits the image to the projection optical system 30.

Accordingly, the projection optical system 30 enlarges and projects an image transmitted from the display panel 22, and the image projected from the projection optical system 30 is displayed on a screen (not shown), so that a human perceives the image.

Therefore, in the optical engine device of the present invention, it is possible to realize a single-body implementation of the combining function of combining the R, G, B laser beams in one path and the primary equalizing function of uniformly diffusing the RGB laser beam synthesized in one path G, and B laser beams emitted from the R, B, and G laser light sources R, G, and B are synthesized into a single laser beam and uniformly diffused sufficiently by adopting the optical component, that is, the synthesizing / equalizing prism 50, It can be transmitted to the integrator 9.

Although not shown in FIG. 2, a collimator may be further provided at the front end of the integrator 9, and the field lens 10 at the rear end of the integrator 9 may be composed of a plurality of lenses, A retarder may be further provided at the front end of the panel 22.

Therefore, in the optical engine apparatus of the present invention, since the effective diameter of the RGB laser beam emitted from the combining / equalizing prism 50 is sufficiently large, the distance between the beam homogenizer 7 and the integrator 9 is sufficiently large The distance between the synthesizing / equalizing prism 50 and the integrator 9, which is required to be secured, can be made close to each other, and the existing limitations in miniaturizing the size of the optical engine device can be improved.

Further, in the optical engine device of the present invention, since it is not necessary to employ the existing beam homogenizer 7 implemented by a microlens array or a diffuser plate, unintentional scattering due to the beam homogenizer 7, The conventional disadvantages of lowering the optical efficiency due to the occurrence of polarization loss are naturally solved (improved).

On the other hand, in the optical engine apparatus of the present invention, since light (laser beam) can be transmitted through the entire color-discriminating component coating surface formed on the synthesizing / equalizing prism 50, The disadvantage of reducing the effective area or increasing the size of the color selection filter is naturally solved (improved).

As described above, according to the optical engine apparatus of the present invention, it is possible to simultaneously perform the combining function of combining the R, G, B laser beams in one path and the uniformizing function of uniformly diffusing the RGB laser beam synthesized in one path An effect of achieving both reduction in size and improvement in optical efficiency can be obtained.

The optical engine device of the present invention further includes an R, G, B laser light source (R, G, B) between a plurality of laser light sources, that is, R, G, B laser light sources (R, G, B) 42, and 43 for adjusting the vertical and horizontal radiation angles of the laser beams emitted by the respective laser beams G, B, and B to be the same.

At this time, the lenses 41, 42, and 43 are provided so as to have curvatures only in the directions in which the radiation angles are larger in the vertical direction and the horizontal direction of the laser beam, for each of the plurality of laser light sources, i.e., the R, G, and B laser light sources R, Lt; / RTI >

Unlike the LED light source, the laser beam emitted from the laser light source differs in vertical and horizontal radiation angles.

1, if the spherical collimator lenses 1, 2, and 3 are used as they are, the R, G, and B laser beams have different incident angles in the vertical and horizontal directions Which may cause the effect of the present invention to be deteriorated or complicate the specific structure for the formation of the color-discriminating component coated surface and / or the total internal reflection.

2, the optical engine device according to the present invention differs from the conventional optical engine device in that the laser beam is irradiated between the R, G, and B laser light sources R, G, and B and the synthesizing / By employing the lenses 41, 42, 43 having the curvature only in the direction of the larger radiation angle in the vertical direction and the horizontal direction, that is, the spherical collimator lenses 41, 42, 43, It is possible to adjust the vertical and horizontal radiation angles to be equal to each other.

Furthermore, in the present invention, the diffusing plates 41a, 42a and 43a for diffusing the laser beam are provided on the respective incident surfaces of the laser beams, that is, the R, G and B laser beams, respectively, which are incident on the combining / . ≪ / RTI >

When the diffusing plates 41a, 42a and 43a are included in the incident surfaces of the R, G and B laser beams incident on the combining / smoothing prism 50, the R, G and B laser beams, The radiation angles of the G, B laser light sources R, G, and B can be further increased.

In the present invention, the RGB laser beam that has passed through the combining / equalizing prism 50 and is emitted to the emitting surface is parallel to the incident angle of the integrator 9 on the emitting surface of the combining / equalizing prism 50 A collimator 56 may be further included.

If the collimator 56 is included in the exit surface of the synthesizing / equalizing prism 50 as described above, the RBG laser beam diffused by the primary smoothing function in the combining / equalizing prism 50 may be incident on the surface of the integrator 9 It is possible to prevent a situation that may become larger than an acceptable incident angle.

As described above, according to the optical engine device of the present invention, it is possible to simultaneously perform a combining function of combining a plurality of laser beams in one path and a uniformizing function of uniformly diffusing a laser beam synthesized in one path By adopting an optical component, it is possible to achieve both a reduction in size and an improvement in optical efficiency.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

According to the optical engine apparatus of the present invention, in a projection display apparatus using a laser light source, a combining function of combining a plurality of laser beams in one path and a smoothing function of uniformly diffusing a laser beam synthesized in one path It is possible to achieve the miniaturization of the size and the improvement of the optical efficiency by adopting the optical parts which can be used in the optical system, Is not only sufficient but also practically usable because it can be practically carried out clearly.

9: Integrator
R, G, B: R, G, B laser light source
50: synthesis / homogenization prism
52, 54: color selection component coating side

Claims (8)

A combining function of combining a plurality of laser beams emitted from a plurality of laser light sources having different wavelengths in one path and a combining / combining function of integrally implementing a primary equalizing function of uniformly diffusing the laser beam synthesized by the one path, Homogenizing prism; And
And an integrator for diffusing a laser beam emitted from the synthesizing / equalizing prism in a second and uniform manner and transmitting the same to a display panel. The method according to claim 1,
In the synthesizing / equalizing prism,
At least one color-separating component coating surface for reflecting or transmitting at least one of the plurality of laser beams incident on the synthesizing / equalizing prism and transmitting the combined light to the emitting surface of the combining / homogenizing prism,
The synthesizing function includes:
And the at least one color discriminating component coating surface formed in the synthesizing / equalizing prism. The method according to claim 1,
The composite /
Wherein each of the plurality of laser beams has a specific structure in which the plurality of laser beams are totally reflected within the combining / equalizing prism based on an incident angle at which the plurality of laser beams are incident on the combining / equalizing prism and an inner refractive index of the combining /
The primary smoothing function may include:
Wherein the optical system is implemented by the specific structure of the synthesizing / equalizing prism. The method according to claim 1,
The laser beam emitted from the laser light source has different radiation angles in the vertical and horizontal directions,
Wherein the optical engine device comprises:
Further comprising a lens arranged between the plurality of laser light sources and the synthesizing / equalizing prism such that vertical and horizontal radiation angles of the laser beams emitted for the plurality of laser light sources are equalized, . 5. The method of claim 4,
The lens,
Wherein each of the plurality of laser light sources has a shape having a curvature only in a direction in which a radiation angle is larger in a vertical direction and a horizontal direction of the laser beam. The method according to claim 1,
Wherein each of the plurality of laser beams further includes a diffusing plate for diffusing a laser beam on each incident surface incident on the combining / smoothing prism. The method according to claim 1,
And a collimator for collimating a laser beam passing through the combining / homogenizing prism and outputting to the emitting surface according to an acceptable incident angle of the integrator, on an emission surface of the combining / homogenizing prism Gt; An incident surface on which a plurality of laser beams having different wavelengths are incident;
At least one color selection component coating surface for reflecting or transmitting at least one of the plurality of incident laser beams according to color and transmitting the plurality of laser beams to one emission surface; And
And an internal total reflection component that totally totally internally reflects the plurality of laser beams incident on the incident surface and transmitted to the emitting surface, based on the incident angle and the internal refractive index of the plurality of laser beams.

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