Multi-channel high brightness optical engine equipment

Abstract

The present invention discloses a high brightness optical engine device, which includes at least one long wavelength red light source, at least one green wavelength light source and at least one blue wavelength light source with a peak wavelength longer than 630nm. In addition, the long wavelength red light can be combined with the short wavelength red light and the green light / blue light into a coaxial optical path by at least one beam combiner, such as a wedge-shaped dichroic mirror, an X-plate dichroic mirror or a dichroic light combining prism. A 3-channel / 4-channel / 5-channel optical engine device and a hybrid laser LED optical engine device are disclosed, which include at least one long wavelength red light source, one blue light source and one fluorescent converted green light source, which are combined by a dichroic mirror with an X-plate dichroic mirror, a wedge-shaped dichroic mirror or a dichroic light combining prism without increasing the optical extension to achieve a high brightness optical engine output of up to 5000lm.

Description

[0001] Related Applications

[0002] This application claims priority to and the benefit of U.S. Provisional Patent Application 62 / 953,226, filed on December 24, 2019, entitled “MULTI-CHANNELS LIGHT ENGINE APPARATUS COMPRISES A LONG WAVELENGTH RED LIGHT SOURCE,” which is hereby incorporated by reference in its entirety. Technical Field

[0003] The technology disclosed in the present invention relates to an optical engine device, specifically to a multi-channel optical engine device and a hybrid laser LED engine device for a high-brightness optical engine lighting system. The optical engine device may include a long-wavelength red light channel and is combined with a green light channel, a blue light channel and / or a short-wavelength red light channel into a coaxial optical path. Background Art

[0004] The existing technology of multi-channel optical engine equipment uses R / G / B light and mixes them together to obtain white and bright color images. It usually uses short-wavelength red LEDs because the human eye is less sensitive to long-wavelength red light. Therefore, from the perspective of brightness sacrifice, long-wavelength red light is not a favorable red wavelength light for current LED projectors. Most of the currently existing RGB optical engines use short-wavelength red LEDs with a peak wavelength of less than 630nm (called red-amber LEDs). But there is a so-called "green gap" in the semiconductor optics industry. Green and amber LEDs with peak wavelengths of approximately 540nm and 575nm, respectively, are right in the middle of the so-called "green gap", such as Figure 1 As shown. Quantum efficiency decreases as the green emission wavelength is approached from both the short wavelength side and the long wavelength side. The red-amber LEDs currently used in LED projection systems are based on aluminum indium gallium phosphide (AlInGaP) materials, which face two challenges. First, as the red wavelength becomes shorter and closer to the "green gap", the efficiency of red LEDs based on AlInGaP decreases. For example, at a peak wavelength of about 620nm (i.e., the ideal red wavelength for illumination), the external quantum efficiency of red-amber LEDs is only about 25%. Second, the thermal efficiency drop of red LEDs based on AlInGaP is much higher than the thermal efficiency drop associated with InGaN-based blue LEDs. Therefore, the performance of red-amber LEDs drops rapidly at high temperatures and high current densities, especially when driven at high duty cycles or continuous waveform modes. Therefore, current light engine systems need to drive short-wavelength red-amber LEDs at low duty cycles to avoid a drop in light output at high current densities (called roll over).

[0005] Moreover, several structures have been developed recently to enhance the brightness of the green channel by adding a top blue pump to the phosphor-converted green LED channel or by using HLD LED technology using a green phosphor-coated rod / tunnel developed by Philips. Both methods can increase the green LED channel brightness by about 50% or more. In this case, when using single-wavelength red-amber light, the duty cycle of the red-amber LED channel needs to be increased to achieve white balance, and the high red duty cycle will suffer from the high current roll-off problem, so when the new top blue pump and HLD technology are used in a multi-channel optical engine configuration, the red LED brightness becomes a bottleneck. In order to overcome the high current roll-off problem and thermal degradation problem of red-amber, it can be improved by adding a red phosphor plate on top of the blue LED chip to obtain phosphor-converted red light. Phosphor-converted red light can solve the degradation and thermal degradation problems of red-amber LEDs, but compared with existing stable red phosphors, it has a wide spectral bandwidth problem, not only red saturation, but also has a large dichroic mirror cutting loss when combined with green and blue light when mixing white in the projection optical engine. Therefore, phosphor-converted red light can solve the thermal degradation problem, but still has the disadvantage of low system efficiency when combined with other wavelengths of light using a dichroic mirror due to its wide spectral bandwidth.

[0006] Therefore, it is necessary to improve the brightness of the red channel of the high brightness optical engine. Specifically, the brightness of the red channel can be increased by adding another LED with a different wavelength of red light. Figure 1 As shown in the dashed line, the quantum efficiency decreases from blue to green-yellow (from left to right) and from red to green-yellow (from right to left). However, the quantum efficiency will increase from amber to red and reach a peak at about 650nm to 660nm, which is called deep red light. Therefore, the deep red LED has the highest quantum efficiency in the red light spectrum. Moreover, compared with the red amber LED with a peak wavelength of about 620nm, the deep red LED with a peak wavelength of about 650nm to 660nm is generally more thermally stable because the semiconductor layer of the deep red device has a wider band gap in the quantum well design. Even though long-wavelength red light may be less sensitive to the human eye, due to its color coordinates (Cx, Cy), especially Cy shifted to the lower right according to the CIE 1931 color space chromaticity diagram, less long-wavelength red light is required during white balance, which keeps the duty cycle of green light high in order to obtain high brightness. At the same time, the downward shift of the color coordinates will help improve the color gamut of the projection system. Therefore, deep red light with a peak wavelength of about 650-660 nm is a good candidate for addition to a projection optical engine to increase the brightness of the red channel when combined with short wavelength red-amber light. The advantages of long wavelength deep red light sources also include:

[0007] 1. Higher quantum efficiency than short-wavelength red-amber LEDs;

[0008] 2. The higher the thermal-cold factor, the higher the thermal stability;

[0009] 3. Less roll-off issues at high current density, so it can be driven at very high currents;

[0010] 4. When combined with current red-amber LEDs, it has better performance at higher duty cycles compared to short-wavelength red-amber LEDs, which can solve the red light bottleneck in multi-channel optical engines.

[0011] In projection systems, in order to effectively use the light emitted from the light source, optical etendue matching is very important, so there is an optimal size for LED light to couple most of the light, usually within a 65-75 degree beam angle, into a projection system with a microdisplay such as a DMD. In projection systems, it is critical to combine multi-channel light into a coaxial optical path without increasing the optical etendue. Dichroic mirror combination is a good way to combine multiple wavelengths. Dichroic mirrors can reflect light in a specific wavelength range but pass light in other wavelength ranges. There are usually 30 to 50 dielectric layers included in a dichroic mirror. - It is relatively easy to coat a low-pass or high-pass dichroic mirror that can reflect or transmit blue light but pass or reflect longer wavelength green and red light, or reflect red light but pass blue and green light. It is also relatively easy to coat a single-bandpass dichroic mirror, but it is more difficult to coat multi-bandpass filters. Therefore, it is necessary to design a multi-channel optical engine device to combine R / G / B optical devices including long wavelength deep red optical devices into a coaxial optical path by using simple low-pass, high-pass or single-bandpass dichroic mirrors to obtain high brightness output. Summary of the invention

[0012] In order to overcome the bottleneck of the brightness of the red light channel in the green-enhanced high-brightness optical engine, the present invention introduces a long-wavelength deep red light source to combine with the existing short-wavelength red-amber light, and describes the construction of a multi-channel optical engine. A high-brightness optical engine device is disclosed, which includes: a first light source, the first light source includes a first green light device configured to emit a green light beam; a second light source, the second light source includes a first blue light device configured to emit a blue light beam; a third light source, the third light source includes a first red light device configured to emit a red light beam with a peak wavelength longer than 630nm; and a first beam combiner, the first beam combiner is configured to combine the red light beam, the green light beam and the blue light beam to form a coaxial optical path; wherein the first beam combiner includes an X-plate dichroic mirror, a wedge-shaped dichroic mirror or a dichroic light-combining prism, which has a multilayer dielectric coating plate to act as a low-pass dichroic mirror, a high-pass dichroic mirror or a single-bandpass dichroic mirror. The optical engine device may further include a second beam combiner configured to assist the first beam combiner in forming a coaxial optical path, wherein the second beam combiner includes at least one dichroic mirror; the first beam combiner may be separated into two dichroic mirrors as the first beam combiner and the third beam combiner, respectively, each dichroic mirror including a multilayer dielectric coating plate; and wherein the green light beam, the blue light beam, and the red light beam will be combined into the coaxial optical path by the first beam combiner and the second beam combiner or the third beam combiner without increasing the optical extension. The peak wavelengths of the long wavelength red light and the short wavelength red light need to differ by 25nm to reduce the dichroic mirror cutting loss. The optical engine device may be configured as a 3-channel / 4-channel / 5-channel optical engine to achieve an optical engine output of up to 3000lm-5000lm with an LED light source. The duty cycle between the green beam, the enhanced red beam, and the blue beam will be optimally balanced. The red, green, and blue light sources or optical devices may be semiconductor light emitting diodes (LEDs), laser light sources, fluorescent conversion light sources, or other semiconductor light sources.

[0013] The wedge-shaped dichroic mirror may be a wedge-shaped plate, and each side of the plate has a different dichroic filter coating. The wedge-shaped dichroic mirror may be replaced by two dichroic plates, each plate having a different dichroic filter coating on one side, and the two dichroic plates are placed at a certain angle. In order to combine light by the wedge-shaped dichroic mirror, a chip emitting light of a first wavelength and a chip emitting light of a second wavelength are packaged on the same substrate, and the light from the two wavelength chips will enter the same optical channel for light collimation, but the two wavelength light beams are incident on the wedge-shaped dichroic mirror at different angles and reflected by different sides of the wedge-shaped dichroic mirror, wherein the wedge-shaped dichroic mirror is configured to have a wedge angle so that the main axes of the two wavelength light beams after the two wavelength light beams are reflected from both sides of the wedge-shaped dichroic mirror will coincide as a coaxial optical channel without increasing the optical extension. Two chips of different wavelengths may also be packaged on two separate substrates, and the light from the two wavelength devices may be combined by an X-plate dichroic mirror or a dichroic light combining prism. In the device, the dichroic light combining prism or X-plate dichroic mirror can be replaced by two dichroic mirrors. The dichroic filter coating plates of the wedge dichroic mirror, X-plate dichroic mirror and standard dichroic mirror in the optical engine device will be configured to use high-pass filters, low-pass filters or single-bandpass filters for easy manufacturing.

[0014] In one aspect, a 3-channel optical engine device is disclosed, which may include at least one long wavelength red light device having a deep red peak wavelength longer than 630nm, at least one green wavelength LED, and at least one blue wavelength LED. In addition, the red, green, and blue LEDs can be combined into a coaxial optical path by a dichroic mirror and a dichroic X-plate / light-combining prism for an optical engine output of up to 3000lm without increasing the optical transmission volume. In addition, the optical engine device may include a short wavelength red-amber LED, and the deep red LED and the short wavelength red-amber LED or the blue LED can be packaged on a single substrate and combined into a coaxial optical path by a wedge-shaped dichroic mirror without increasing the optical transmission volume. The dielectric dichroic coating plate in the dichroic mirror or the X-plate or the wedge-shaped dichroic mirror can be a low-pass filter, a high-pass filter, or a single-bandpass filter.

[0015] The green LED device can be: a fluorescent conversion green (CG) LED with a green fluorescent conversion plate deposited directly on top of the blue LED chip, and the blue light pumps the green fluorescent plate from the bottom of the green LED device; or a fluorescent conversion green light device pumped remotely from the top side, which has a green phosphor deposited on a highly reflective and thermally conductive substrate; or a fluorescent conversion green rod / tube, which has multiple blue LED chips attached to the rod / tube, and these chips have green phosphor coated on the surface of the rod / tube. The long wavelength red LED can be: a semiconductor red LED or a fluorescent conversion red (CR) LED, which has a red fluorescent conversion plate deposited directly on top of the blue LED chip, or remotely pumped from the top side with a red phosphor deposited on a highly reflective and thermally conductive substrate for fluorescent conversion.

[0016] On the other hand, a 4-channel optical engine device is disclosed, which may include at least one long wavelength red light device having a deep red peak wavelength longer than 630nm, at least one short wavelength red light device having a red amber peak wavelength less than 630nm, at least one green wavelength LED, and at least one blue wavelength LED. In addition, the red, green, and blue LEDs can be combined into a coaxial optical path through a dichroic mirror and a dichroic X-plate / light-combining prism for an optical engine output of up to 3000lm to 4000lm without increasing the optical extension. The deep red LED and the red amber LED or the blue LED can be packaged on a single substrate and combined through a wedge-shaped dichroic mirror. The dielectric dichroic coating plate in the dichroic mirror or the X-plate or the wedge-shaped dichroic mirror can be a low-pass filter, a high-pass filter, or a single-bandpass filter. The green LED can have fluorescence conversion from a blue chip at the bottom, and / or remote conversion from the top or from a light pipe / rod conversion layer.

[0017] On the other hand, a 5-channel optical engine device is disclosed, which may include at least one long wavelength red light device having a deep red peak wavelength longer than 630nm, at least one short wavelength red light device having a red amber peak wavelength less than 630nm, at least one fluorescent conversion green wavelength LED, at least one short wavelength blue LED for top pumping the conversion green fluorescent plate, and at least one long wavelength display blue LED. In addition, the deep red LED and the red amber LED can be combined by a dichroic mirror or a dichroic X-plate / light-combining prism; the deep red LED and the red amber LED or the blue LED can be packaged on a single substrate and combined by a wedge-shaped dichroic mirror. The top-pumped blue LED channel may include a dichroic mirror that separates the blue LED light and the converted green LED light. The peak wavelength of the top-pumped short wavelength blue LED light may be 430nm to 450nm, and the peak wavelength of the long wavelength display blue LED may be 445nm to 465nm. The dielectric dichroic coating plate in the dichroic mirror or X-plate or wedge-shaped dichroic mirror can be a low-pass filter, a high-pass filter or a single-bandpass filter. The green and red LEDs can have fluorescence conversion from the blue chip at the bottom, and / or remote fluorescence conversion from the top or fluorescence conversion from the light pipe / rod. In this 5-channel optical engine device, multiple red lights, blue lights, and green lights can be combined into a coaxial optical path by a dichroic mirror and a dichroic X-plate or a wedge-shaped dichroic mirror to produce an optical engine output of up to 5000lm without increasing the optical extension. In a 5-channel optical engine configuration, if the optical devices of one or two channels are removed, the 5-channel configuration can be easily changed to a 4-channel configuration and a 3-channel configuration.

[0018] On the other hand, a hybrid laser LED optical engine device for a high-brightness optical engine lighting system is disclosed, which may include: at least one long-wavelength red light device having a deep red peak wavelength longer than 630 nm; at least one short-wavelength red LED having a red-amber peak wavelength less than 630 nm; at least one fluorescent-converted green light device and at least one blue laser diode; and at least one first beam combiner, which is constructed to combine a red light beam, a green light beam, and a blue light beam to form a coaxial optical path; wherein the first beam combiner includes an X-plate dichroic mirror, a wedge-shaped dichroic mirror, two dichroic mirrors, or a dichroic light-combining prism, and these dichroic mirrors have multi-layer dielectric coatings to act as a low-pass dichroic filter, a high-pass dichroic filter, or a single-bandpass dichroic filter; and wherein at least one of the first light source, the second light source, and the third light source includes at least a laser diode configured to emit a laser beam. The deep red LED and the red amber LED can be combined by a dichroic mirror or a dichroic light combining prism; the deep red LED and the red amber LED can be packaged on a single substrate and combined by a wedge-shaped dichroic mirror. The fluorescent conversion green light channel can have a fluorescent conversion plate deposited on top of a reflector, wherein a blue laser pumps the fluorescent conversion plate from the top, or the fluorescent conversion green light channel can have a fluorescent conversion layer coated on a rotating wheel and a blue laser pumps the fluorescent conversion layer from the bottom, wherein the color wheel includes a green phosphor segment and a blank segment, and the green phosphor segment is configured to emit a green light beam when pumped by blue light, and wherein the area of ​​the segment defines the duty cycle of the blue and green on time in a period.

[0019] Therefore, in the optical engine system of the present invention, a long wavelength deep red light source will be used to combine with a short wavelength red amber light source into a coaxial optical path through a dichroic mirror without increasing the optical extension to overcome the red light brightness bottleneck in the high brightness optical engine system with green light enhancement. The difference between the long wavelength red light and the short wavelength red light needs to have a wavelength of at least 25nm to reduce the dichroic mirror cutting loss. With the significant increase in the brightness of the red light channel from the combination of the long wavelength red LED and the short wavelength red LED, the duty cycle of the red light channel can be significantly reduced, so the red amber LED can be driven at a higher current without roll-off problems, and the duty cycle of the green light channel can be significantly increased to achieve an optical engine brightness of up to 5000lm. In addition to the brightness improvement, the long wavelength deep red light can also increase the color gamut of the projection system. In addition, by using a wedge-shaped dichroic mirror or a dichroic X-plate / light-combining prism, the compact size of the optical engine device can be achieved, and in the present invention, only a simple low-pass, high-pass or single-bandpass dichroic mirror is used as a new construction of a multi-channel high brightness optical engine device to obtain a high brightness output.

[0020] The scope of the present invention is defined by the claims.A more complete understanding of embodiments of the present disclosure, as well as a realization of additional advantages of the present disclosure, will be afforded to those skilled in the art by consideration of the following detailed description of one or more embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A graph showing the green drop gap of a semiconductor light emitting device.

[0022] Figure 2 A first embodiment of a 3-channel optical engine device according to the present disclosure is illustrated.

[0023] Figure 3 A first embodiment of a 4-channel optical engine device according to the present disclosure is illustrated.

[0024] Figure 4 A first embodiment of a 5-channel optical engine device according to the present disclosure is illustrated.

[0025] Figure 5 An alternative embodiment of a 3-channel optical engine device according to the present disclosure is illustrated.

[0026] Figure 6 Another alternative embodiment of a 3-channel optical engine device according to the present disclosure is illustrated.

[0027] Figure 7 Another alternative embodiment of a 3-channel optical engine device according to the present disclosure is illustrated.

[0028] Figure 8 Another alternative embodiment of a 3-channel optical engine device according to the present disclosure is illustrated.

[0029] Fig. 9 An alternative embodiment of a 4-channel optical engine device according to the present disclosure is illustrated.

[0030] Fig.10 Another alternative embodiment of a 3-channel optical engine device according to the present disclosure is illustrated.

[0031] Fig.11 Another alternative embodiment of a 3-channel optical engine device according to the present disclosure is illustrated.

[0032] Fig.12 Another alternative embodiment of a 4-channel optical engine device according to the present disclosure is illustrated.

[0033] Fig.13 Another alternative embodiment of a 4-channel optical engine device according to the present disclosure is illustrated.

[0034] Fig.14Another alternative embodiment of a 4-channel optical engine device according to the present disclosure is illustrated.

[0035] Fig.15 Another alternative embodiment of a 4-channel optical engine device according to the present disclosure is illustrated.

[0036] Fig.16 An alternative embodiment of a 5-channel optical engine device according to the present disclosure is illustrated.

[0037] Fig.17 Another alternative embodiment of a 5-channel optical engine device according to the present disclosure is illustrated.

[0038] Fig.18 Another alternative embodiment of a 5-channel optical engine device according to the present disclosure is illustrated.

[0039] Fig.19 Another alternative embodiment of a 5-channel optical engine device according to the present disclosure is illustrated.

[0040] Fig. 20 Another alternative embodiment of a 5-channel optical engine device according to the present disclosure is illustrated.

[0041] Fig.21 A first embodiment of a hybrid laser LED optical engine device according to the present disclosure is illustrated.

[0042] Fig. 22 An alternative embodiment of a hybrid laser LED optical engine device according to the present disclosure is illustrated.

[0043] Fig.23 Another alternative embodiment of a hybrid laser LED optical engine device according to the present disclosure is illustrated.

[0044] Fig.24 Another alternative embodiment of a hybrid laser LED optical engine device according to the present disclosure is illustrated.

[0045] Fig.25 Another alternative embodiment of a hybrid laser LED optical engine device according to the present disclosure is illustrated.

[0046] Embodiments of the present disclosure and their advantages will be best understood by referring to the following detailed description.It should be appreciated that like reference numerals are used to identify like elements illustrated in one or more of the accompanying drawings. DETAILED DESCRIPTION

[0047] As Figure 2The first embodiment of the high brightness 3-channel optical engine device according to the present invention includes at least a long wavelength red LED 101 having a deep red (DR) peak wavelength of 640nm to 660nm, a short wavelength red (R) LED 102 having a red amber peak wavelength of about 620nm, a fluorescent conversion green (CG) LED 104 and a blue (B) LED 103, wherein the converted green light emitted from the fluorescent conversion green LED 104 through a lens 104A as a first optical channel is combined by a dichroic mirror 105 with the blue light emitted from the blue LED 103 through a lens 103A as a second optical channel, and wherein the deep red LED 101 and the red amber LED 102 are packaged on a single substrate, the deep red light emitted from the deep red LED 101 and the red amber light emitted from the red amber LED 102 are converged by a lens 101A as a third optical channel, and then combined into the coaxial optical path 10 by a wedge-shaped dichroic mirror 106. The peak wavelength of crimson light needs to differ from the peak wavelength of red-amber light by no less than 25 nm in order to reduce the dichroic mirror cutting loss. The dielectric dichroic coating plate of the dichroic mirror 105 is a high-pass filter that reflects short-wavelength blue light but passes long-wavelength green and red light. The dielectric dichroic coating plate of the wedge-shaped dichroic mirror 106 is a low-pass filter that passes blue and green light but reflects red light; wherein the top-side dielectric coating of the wedge-shaped dichroic mirror 106 will pass blue, green, and red-amber light but reflect crimson light, while the bottom-side dielectric coating of the wedge-shaped dichroic mirror 106 will pass blue and green light but reflect red-amber and crimson light. The wedge-shaped dichroic mirror 106 can be replaced by two dichroic plates placed at a certain angle, and have two different dielectric coatings on one side of each dichroic plate. The combined red LED light and the combined green / blue light are combined into the coaxial optical path 10 without increasing the optical etendue to form a compact optical engine configuration. In order to combine light through the wedge-shaped dichroic mirror 106, since the deep red LED 101 and the red amber LED 102 are packaged on the same substrate, the light from the two LEDs will enter the same optical channel (e.g., lens 101A) for light collimation, but the two light beams of different wavelengths are incident on the wedge-shaped dichroic mirror at different angles and will be reflected by different sides of the wedge-shaped dichroic mirror 106 that are configured to have a wedge angle, so that the main axes of the two light beams of different wavelengths after reflecting from different sides of the wedge-shaped dichroic mirror will overlap within a beam angle of 65 degrees to 75 degrees into the coaxial optical path 10 without increasing the optical etendue. The coaxial optical path RGB combined light will hit the fly-eye array lens 110 before illuminating the micro display panel by the condenser lens 120 for uniformization. When heat pipes or vapor channels are used for thermal management, the 3-channel optical engine device will have a compact size and can operate at over 4-6 A / mm 2It can be driven at a high current density to achieve a high brightness optical engine output of up to 3000lm.

[0048] As Figure 3The first embodiment of the high brightness 4-channel optical engine device according to the present invention includes at least a long wavelength red LED 201 with a deep red (DR) peak wavelength of 640nm to 660nm, a short wavelength red (R) LED 202 with a red-amber peak wavelength of about 620nm, a fluorescent converted green (CG) LED 204, a top pumped short wavelength blue (BP) LED 207 and a display blue (B) LED 203, wherein the fluorescent converted green LED light from the fluorescent converted green (CG) LED 204 as the first optical channel includes the bottom pumped green light from the blue chip at the bottom of the CG LED 204 and the top pumped green light of the remote pumped blue light in the second optical channel of the blue pump (BP) LED 207 through the lens 207A, and will enter the coaxial optical path 20 through the lens 204A and the wedge-shaped dichroic mirror 206. The deep red LED 201 and the red amber LED 202 are packaged on a single substrate, and the deep red light emitted from the deep red LED 201 and the red amber light emitted from the red amber LED 202 are converged by the lens 201A as the third light channel and then reflected by the wedge-shaped dichroic mirror 206 into the coaxial optical path 20. The peak wavelength of the deep red light needs to be less than 25nm different from the peak wavelength of the red amber light in order to reduce the dichroic mirror cutting loss. The fluorescent converted green LED light and the combined deep red light / red amber light will be reflected by the dichroic mirror 205, but the blue light from the display blue (B) LED 203 as the fourth light channel will pass through the dichroic mirror 205, so that the RGB light will be combined into the RGB coaxial optical path 20' to obtain a high brightness optical engine configuration. The dielectric dichroic coating plate of the dichroic mirror 205 is a low-pass filter that passes blue light but reflects green and red light. The dielectric dichroic coating plate of the wedge-shaped dichroic mirror 206 is also a low-pass filter that passes blue and green light but reflects red light. In order to combine light through the wedge-shaped dichroic mirror 206, the deep red LED 201 and the red amber LED 202 are packaged on the same substrate, and the light from the two LEDs will enter the same optical channel (e.g., lens 201A) so that the light is collimated, but the two light beams of different wavelengths are incident on the wedge-shaped dichroic mirror 206 at different angles and will be reflected by different sides of the wedge-shaped dichroic mirror 206 having corresponding dielectric coatings at different sides (the different sides are configured to have a wedge angle), so that the main axes of the two light beams of different wavelengths after reflecting from different sides of the wedge-shaped dichroic mirror will overlap within a beam angle of 65 degrees to 75 degrees into the coaxial optical path 20 without increasing the optical etendue. The RGB coaxial optical path combined light will hit the fly-eye array lens 210 for uniformization before illuminating the microdisplay panel by a condenser lens (not shown). The 4-channel optical engine can operate at over 4-6A / mm 2It can be driven at a high current density to achieve a high brightness optical engine output of up to 3000lm to 4000lm.

[0049] As Figure 4 The first embodiment of the high brightness 5-channel optical engine device according to the present invention includes a long wavelength red LED 301 with a deep red (DR) peak wavelength of 640nm to 660nm, a short wavelength red (R) LED 302 with a red amber wavelength of about 620nm peak wavelength, a fluorescent converted green (CG) LED 304 and a top pumped short wavelength blue (BP) LED 307 and a blue (B) wavelength LED 303, wherein the deep red LED 301 and the red amber LED 302 are respectively packaged on separate substrates as a first optical channel and a second optical channel, and the peak wavelength of the deep red light needs to differ from the peak wavelength of the red amber light by no less than 25nm in order to reduce the dichroic mirror cutting loss. The dichroic mirror 305 is configured to separate the converted green light from the blue pump light as the fifth optical channel emitted from the top pumped short wavelength blue LED 307. The fluorescent converted green LED light as the fourth optical channel from the fluorescent converted green (CG) LED 304 includes the bottom pumped green light from the blue chip at the bottom of the CG LED 304 and the top pumped green light of the remote pumped blue light in the fifth optical channel from the blue pump (BP) LED 307, which will pass through the lens 304A and the dichroic mirror 305. The converted green light with the top pumped fluorescent converted green light, the red amber light reflected by the dichroic mirror 305, the deep red light from the deep red LED 301, and the blue light as the third optical channel from the blue (B) wavelength LED 303 will be combined into the coaxial optical path 30 by the X-plate dichroic mirror 308 without increasing the optical etendue to obtain a high brightness optical engine configuration. The dielectric dichroic coating plate of the dichroic mirror 305 is a single bandpass filter that reflects blue and red light but passes green light. The dielectric dichroic coating plate of the X-plate dichroic mirror 308 includes a low-pass deep red reflector 308A and a high-pass blue reflector 308B. The coaxial optical path RGB combined light will hit the fly-eye array lens 310 for homogenization before illuminating the microdisplay panel by the focusing lens 320. Alternatively, the blue wavelength LED 303 can have a long wavelength blue (LB) chip of 460nm to 470nm and a short wavelength blue (SB) chip of 430nm to 440nm, the two chips are packaged on the same substrate, and the high-pass blue reflector 308B is replaced by a wedge-shaped dichroic mirror, which is used to combine the two blue wavelength lights into the coaxial optical path. The 5-channel optical engine can operate at more than 4 to 6A / mm 2The illumination beam will be reflected by the microdisplay and enter the projection optical system through the optical prism; the projection light output in the microdisplay projection system can achieve a high brightness optical engine output of up to 5000lm.

[0050] As Figure 5 An alternative embodiment of the high brightness 3-channel optical engine device according to the present invention includes at least a long wavelength red LED 401 having a deep red (DR) peak wavelength of 640nm to 660nm, a short wavelength red (R) LED 402 having a peak wavelength of about 620nm, a fluorescent converted green (CG) LED 404, a short wavelength top blue pump (BP) LED 407, and a display blue (B) wavelength LED 403, wherein the deep red LED 401 and the red amber LED 402 are packaged on a single substrate, the deep red light emitted from the deep red LED 401 and the red amber light emitted from the red amber LED 402 are converged by a lens 401A and then combined by a wedge-shaped dichroic mirror 406, and the peak wavelength of the deep red light needs to differ from the peak wavelength of the red amber light by no less than 25nm in order to reduce the cutting loss of the dichroic mirror. In order to combine light through the wedge-shaped dichroic mirror 406, the deep red LED 401 and the red amber LED 402 are packaged on the same substrate, so the light from the two LEDs will enter the same optical channel (e.g., lens 401A) for light collimation, but the two light beams of different wavelengths are incident on the wedge-shaped dichroic mirror 406 at different angles and will be reflected from different sides of the wedge-shaped dichroic mirror 406 configured to have a wedge angle, so that the main axes of the two light beams of different wavelengths after reflecting from different sides of the wedge-shaped dichroic mirror will overlap into the coaxial optical path 40 without increasing the optical etendue. The blue pump LED 407 and the display blue LED 403 are packaged on a single substrate. The blue pump light from the blue pump LED 407 is used to remotely pump the green phosphor plate on the phosphor conversion green (CG) LED 404 from the top of the phosphor plate, and the top pumped green light will be reflected at the reflective layer of the LED chip of the phosphor conversion green LED and combined with the bottom pumped phosphor conversion green LED light, and then the converted green light will be combined with the display blue light into the coaxial optical path through the X-plate dichroic mirror 408. The dielectric dichroic coated plate of the X-plate dichroic mirror 408 includes a high-pass short-wavelength blue reflector 408A and a low-pass green reflector 408B. The dielectric dichroic coated plate of the wedge-shaped dichroic mirror 406 is a low-pass filter that passes blue and green light but reflects red light. The combined red LED light and the combined green / blue light are combined into the coaxial optical path 40 without increasing the optical etendue. The coaxial optical path RGB combined light will hit the fly-eye array lens 410 before illuminating the microdisplay panel by the condenser lens 420 for uniformization.

[0051] As Figure 6 Another alternative embodiment of the high brightness 3-channel optical engine device according to the present invention includes at least a long wavelength red (DR) light source 501 with a deep red peak wavelength of 640nm to 660nm, a short red light source 502 with a peak wavelength of about 620nm, a fluorescent conversion green (CG) light source 504, and a display blue wavelength light source 503, wherein different wavelength optical chips can be packaged on the same substrate and combined into a coaxial optical path by a wedge-shaped dichroic mirror without increasing the optical extension. Figure 6 As shown, the blue LED chip 503 and the deep red LED chip 501 are packaged on the same substrate and combined into a coaxial optical path 50 through a wedge-shaped dichroic mirror 506 . In order to combine light through the wedge-shaped dichroic mirror 506, the deep red light source 501 and the display blue light source 503 are packaged on the same substrate, and the light from the two will enter the same optical channel (for example, lens 501A) so that the light is collimated, but the two light beams of different wavelengths are incident on the wedge-shaped dichroic mirror 506 at different angles and will be reflected by different sides of the wedge-shaped dichroic mirror 606. Specifically, the dielectric dichroic coating of the wedge-shaped dichroic mirror 506 includes a low-pass dielectric coating on one side and a high-pass dielectric coating on the other side, the low-pass dielectric coating passes blue light, green light and red-amber light but reflects deep red light, and the high-pass dielectric coating passes green light and red-amber light but reflects blue light, so that the main axes of the two light beams of different wavelengths after being reflected from different sides of the wedge-shaped dichroic mirror will overlap into the coaxial optical path 50 without increasing the optical etendue. The coaxial optical path RGB combined light will hit the fly-eye array lens 510 for homogenization before illuminating the microdisplay panel by the condenser lens 520. The deep red light source can be a deep red LED or a semiconductor laser. The fluorescent converted green light source can be a green fluorescent plate deposited directly on top of the blue LED chip, or a converted green rod / tube having multiple blue LED chips attached to the rod / tube with green fluorescent powder coated on the surface.

[0052] As Figure 7Another alternative embodiment of the high brightness 3-channel optical engine device according to the present invention includes at least a long wavelength red (DR) light source 601, a fluorescent conversion green (CG) LED 604 and a blue (B) wavelength LED 603, wherein the red light, the green light and the blue light are combined into the coaxial optical path 60 by an X-plate dichroic mirror 608 without increasing the optical extension. The red light source can be a long wavelength red light LED with a deep red peak wavelength of 640nm to 660nm, or a red semiconductor laser. Alternatively, the red light source can also be a fluorescent conversion red LED with a long wavelength fluorescent plate, and another short wavelength blue light can top pump the fluorescent plate. The dielectric dichroic coating plate of the X-plate dichroic mirror 608 includes a low pass red reflector 608A and a high pass blue reflector 608B. The coaxial optical path RGB combined light will hit the compound eye array lens 610 for homogenization before being illuminated by the focusing lens 620 to the micro display panel. Alternatively, as Figure 8 As shown, the red light source may include a long wavelength deep red LED chip 701 and a short wavelength red amber (R) chip 702 packaged on the same substrate, and is combined with the fluorescent converted green light from the fluorescent converted green (CG) light source 704 and the blue light from the blue (B) wavelength LED 703 by an X-plate dichroic mirror 708, one of which may be a wedge mirror 706. The dielectric dichroic coating plate of the X-plate dichroic mirror 708 includes a high pass blue reflector, and a wedge dichroic mirror 706 having a low pass red amber reflective coating and a deep red reflective coating on different sides of the wedge mirror. The coaxial optical path 70RGB combined light will hit the fly-eye array lens 710 for uniformization before being illuminated by the condenser lens 720 to illuminate the micro display panel.

[0053] As Fig. 9An alternative embodiment of a high brightness 4-channel optical engine device according to the present invention includes at least a long wavelength red LED 801 having a deep red (DR) peak wavelength of 640nm to 660nm, a short wavelength red LED 802 having a red amber (R) peak wavelength of about 620nm, a fluorescent converted green (CG) LED 804, a blue pump (BP) LED 807 and a blue (B) LED 803, wherein the deep red LED 801 and the red amber LED 802 are packaged on a single substrate, the deep red light emitted from the deep red LED 801 and the red amber light emitted from the red amber LED 802 are converged by a lens 801A, and then combined with the display blue LED light emitted from the blue (B) LED 803 by a wedge-shaped dichroic mirror 806. The blue light emitted from the blue pump (BP) LED 807 is reflected by the dichroic mirror 805 and top pumps the bottom blue chip of the fluorescent converted green (CG) LED 804 so that the fluorescent converted green LED light is emitted from the fluorescent converted green (CG) LED 804, and then the fluorescent converted green light will pass through the lens 804A and the dichroic mirror 805. The display blue light is emitted from the blue (B) LED 803 and converged by the lens 803A and passes through the wedge-shaped dichroic mirror 806. The combined deep red / display blue light / red amber light and the fluorescent converted green light will be combined by the dichroic mirror 805 to have a coaxial optical path to obtain a high brightness optical engine configuration. The dielectric dichroic coating plate of the wedge-shaped dichroic mirror 806 includes a low-pass dielectric coating plate that passes blue light, green light and reflects red light. The dielectric dichroic coating plate of the dichroic mirror 805 includes a single-band pass dielectric coating. The coaxial optical path RGB combined light will hit the fly-eye array lens 810 for uniformization before being illuminated by the condenser lens (not shown) to the microdisplay panel.

[0054] As an alternative, the deep red LED and the display blue LED can be packaged on a single substrate and combined with the red-amber LED light by a wedge-shaped dichroic mirror. In this configuration, if the blue pump LED channel is not needed, then the configuration becomes as follows: Fig.103-channel construction in. The deep red LED chip 901 and the red-amber LED chip 902 can be packaged on a single substrate, and combined with the blue light from the blue wavelength LED 903 by the wedge-shaped dichroic mirror 906, and then combined with the fluorescence-converted green LED light from the fluorescence-converted green (CG) LED 904 by the dichroic mirror 905 into the coaxial optical path 90 to obtain a high-brightness optical engine construction. The coaxial optical path RGB combined light will hit the fly-eye array lens 910 for homogenization. As another alternative embodiment of the 3-channel optical engine device, the deep red LED chip 1001 and the red-amber LED chip 1002 can be packaged on a single substrate, and combined with the fluorescence-converted green light from the fluorescence-converted green (CG) LED 1004 by the wedge-shaped dichroic mirror 1006, and then combined with the blue light from the blue wavelength LED 1003 by the dichroic mirror 1005 into the coaxial optical path 100 to obtain a high-brightness optical engine construction, such as Fig.11 By way of example, the coaxial optical path RGB combined light will hit the fly-eye array lens 810 for homogenization before being illuminated by a condenser lens (not shown) to illuminate the microdisplay panel.

[0055] As Fig.12 Another alternative embodiment of the high brightness 4-channel optical engine device according to the present invention includes at least a long wavelength red LED 1101 having a deep red (DR) peak wavelength of 640nm to 660nm, a short wavelength red LED 1102 having a red amber (R) peak wavelength of about 620nm, a phosphor-converted green (CG) LED 1104, a blue pump (BP) LED 1107, and a blue (B) wavelength LED 1103, wherein the deep red LED 1101 and the red amber LED 1102 are packaged on a single substrate and combined into a coaxial optical path 110 by a wedge-shaped dichroic mirror 1106. The phosphor-converted green LED light from the phosphor-converted green (CG) LED 1104 is light pumped from the bottom blue chip, and light pumped from the remote top blue light of the blue pump (BP) LED 107. The combined deep red / blue / red light and the fluorescent converted green light will be combined by the dichroic mirror 1105 to have a coaxial optical path 110 to obtain a high brightness optical engine configuration. The dielectric dichroic coating plate of the dichroic mirror 1105 includes a low-pass dielectric coating. The dielectric dichroic coating plate of the wedge-shaped dichroic mirror 1106 includes a low-pass dielectric coating that passes blue light, green light and reflects red light. The coaxial optical path RGB combined light will hit the fly-eye array lens 1110 for homogenization before being illuminated by a condenser lens (not shown) to illuminate the microdisplay panel.

[0056] As another alternative embodiment of the high brightness 4-channel optical engine device according to the present invention, it at least includes a long wavelength red light source 1201 with a deep red (DR) peak wavelength of 640nm to 660nm, a short wavelength red LED 1202 with a red amber (R) peak wavelength of about 620nm, a fluorescent conversion green (CG) light source 1204 and a blue wavelength light source 1203, wherein the four light sources are packaged on four separate substrates and combined by an X-plate dichroic mirror 1208 and a dichroic mirror 1205. Fig.13 In the embodiment, the fluorescent converted green light, blue light and short wavelength red light are combined by the X-plate dichroic mirror 1208, and then combined with the deep red light by the dichroic mirror 1205 into the coaxial optical path 120. The dielectric dichroic coating plate of the X-plate dichroic mirror 1208 includes a low-pass dielectric coated red reflector 1208A and a high-pass dielectric coated blue reflector 1208B. The dielectric dichroic coating plate of the dichroic mirror 1205 includes a low-pass dielectric coating, which passes blue light, green light and red amber light, and reflects deep red light. Fig.14 In the figure, deep red LED light from deep red light source 1301 is combined with red amber light from red amber light source 1302 through X-plate dichroic mirror 1308, and then combined with fluorescent converted green light and blue light from fluorescent converted green (CG) light source 1304 and blue wavelength light source 1303 respectively into coaxial optical path 130 without increasing optical expansion.

[0057] Fig.15 Another alternative embodiment of a 4-channel optical engine device is illustrated in FIG, wherein the fluorescent converted green light from the fluorescent converted green (CG) light source 1404 and the red amber light from the short wavelength red LED 1402 are combined by a dichroic mirror 1405. The deep red light from the long wavelength red light source 1401 and the blue light from the blue wavelength light source 1403 are combined by an X-plate dichroic mirror 1408 and then combined with the combined fluorescent converted green / red amber light into the coaxial optical path 140 without increasing the optical etendue. The deep red light source can be a deep red LED or a semiconductor laser. The fluorescent converted green light source can be a green phosphor plate deposited directly on top of the blue LED chip, or a converted green rod / tube having multiple blue LED chips attached to the rod / tube with green phosphor coated on the surface. The combined deep red / blue / red amber light and fluorescent converted green light will have a coaxial optical path 140 to obtain a high brightness optical engine configuration. The coaxial optical path RGB combined light will hit the fly-eye array lens 1410 for uniformization before being illuminated by the condenser lens (not shown) to the microdisplay panel.

[0058] As Fig.16An alternative embodiment of the high brightness 5-channel optical engine device according to the present invention includes at least a long wavelength red LED 1501 having a deep red (DR) peak wavelength of 640nm to 660nm, a short wavelength red LED 1502 having a red amber (R) peak wavelength of about 620nm, a fluorescent converted green (CG) LED 1504, a blue pump (BP) LED 1507 and a blue (B) LED 1503, wherein an X-plate dichroic mirror 1508 and a dichroic mirror 1505 are used to combine the five different spectral light beams from the above five different light sources into a coaxial optical path 150 without increasing the optical extension. Fig.16 In the embodiment, the fluorescence converted green light pumped from the bottom blue chip and the remote top blue light pumped, as well as the blue light are combined by the dichroic mirror 1505 into the coaxial optical path; the deep red light and the red-amber light are combined by the X-plate dichroic mirror 1508, and then combined with the mixed fluorescence converted green / blue light into the coaxial optical path 150, and hit the compound eye array lens 1510 for homogenization before illuminating the microdisplay panel through the focusing lens. The dielectric dichroic coating plate of the dichroic mirror 1505 is a high-pass filter that reflects blue light but passes green and red light. The dielectric dichroic coating plate of the X-plate dichroic mirror 1508 includes a low-pass deep red reflector 1508A and a high-pass blue and green reflector 1508B. As an alternative, in Fig.17 In the embodiment, the fluorescence converted green light pumped by the bottom blue chip of the fluorescence converted green (CG) LED 1604 and the top pump blue light of the blue pump (BP) LED 1607, the red amber light from the short wavelength red LED 1602, and the deep red light from the long wavelength red LED 1601 are combined by the X-plate dichroic mirror 1608, and then combined by the dichroic mirror 1605 with the display blue light from the blue (B) wavelength LED 1603 into the coaxial optical path 160, and will hit the fly-eye array lens 1610 for uniformization before illuminating the microdisplay panel by the focusing lens. As another alternative, in Fig.18 In the embodiment, the display blue light from the blue (B) wavelength LED 1703, the red amber light from the short wavelength red LED 1702, and the deep red light from the long wavelength red LED 1701 are combined by the X-plate dichroic mirror 1708, and then combined with the fluorescence converted green light into the coaxial optical path 170 and hit the fly-eye array lens 1710 for homogenization, and the converted green light is emitted from the bottom blue chip of the fluorescence converted green (CG) LED 1704 and pumped from the top by the blue pump (BP) LED 707. In the device, the X-plate dichroic mirror can be replaced by two dichroic mirrors.

[0059] As Fig.19In another alternative embodiment of the high brightness 5-channel optical engine device according to the present invention, the blue wavelength LED can have a long wavelength blue (LB) chip 1803A of 460nm to 470nm and a short wavelength blue (SB) chip 1803B of 430nm to 440nm, which are packaged on the same substrate, and a wedge-shaped dichroic mirror 1806 is used to combine two different blue wavelength lights into a coaxial optical path. The long wavelength blue light and the short wavelength blue light will be combined by the wedge-shaped dichroic mirror 1806 with the phosphor-converted green light emitted from the bottom blue chip of the phosphor-converted green (CG) LED 1804 and pumped by the remote top blue light produced by the blue pump (BP) LED 1807, and the light combined by the wedge-shaped dichroic mirror 1806 is then combined by the X-plate dichroic mirror 1808 with the deep red light from the deep red (DR) LED 1801 and the red amber light from the red amber (R) LED 1802 into the coaxial optical path 180 before hitting the fly-eye array lens 1810 for homogenization without increasing the optical etendue. The dielectric dichroic coating plate of the wedge-shaped dichroic mirror 1806 is a high-pass filter that reflects blue light but passes green and red light. The dielectric dichroic coating of the X-plate dichroic mirror 1808 includes a low-pass deep red reflector 1808A and a high-pass blue and green reflector 1808B. The 5-channel optical engine can operate at over 4-6 A / mm 2 The high current density of the 3-channel / 4-channel / 5-channel configuration can generate a high brightness optical engine output of up to 4000lm to 5000lm. Other aspects of the 3-channel / 4-channel / 5-channel configuration include blue LEDs, which can include a long wavelength blue chip of 460nm to 470nm and a short wavelength blue chip of 430nm to 440nm, which are packaged on the same substrate.

[0060] As Fig. 20Another alternative embodiment of the high brightness 5-channel optical engine device according to the present invention includes at least a fluorescent conversion red (CR) LED light source 1901', a fluorescent conversion green (CG) LED light source 1904, a display blue (B) wavelength light source 1903, a blue pump (BP) light source 1907 for top pumping of a green fluorescent panel, and a second blue pump (BP) light source 1907' for top pumping of a red fluorescent panel, wherein the red fluorescent panel may have a long peak wavelength of 640nm to 660nm. The combined fluorescent conversion green light, fluorescent conversion red light, and blue light will be combined into a coaxial optical path by two dichroic mirrors 1905A, 1905B, and then hit the fly-eye array lens 1910 for uniformization before being illuminated by a focusing lens 1920 to illuminate the microdisplay panel. The dielectric dichroic coating of dichroic mirror 1905A includes a high pass filter that reflects blue light but passes green and red light, while the dielectric dichroic coating of dichroic mirror 1905B includes a low pass filter that passes blue and green light but reflects red light. The blue pump light source can be a blue LED light source or a blue laser.

[0061] As a first embodiment of a hybrid laser LED optical engine device according to the present invention, it includes at least one long wavelength red light having a deep red peak wavelength longer than 630nm, at least one blue wavelength light, fluorescence converted green light, and top pumped blue light from a top pump fluorescence converted green light device of a green fluorescent plate. In addition, at least one of the deep red wavelength light and the top pumped blue light is emitted from a laser diode device. The red light, the fluorescence converted green light, and the blue light will be combined into a coaxial optical path through a beam combiner without increasing the optical extension to obtain a high brightness optical engine configuration. The beam combiner can be a wedge-shaped dichroic mirror, an X-plate dichroic mirror, or a single dichroic mirror. As Fig.21As shown, the red light channel may include a long wavelength red LED 2001 having a peak wavelength of 640nm to 660nm and a short wavelength red LED 2002 having a red-amber peak wavelength of approximately 620nm, wherein the deep red LED 2001 and the red-amber LED 2002 are packaged on a single substrate and combined by a wedge-shaped dichroic mirror 2005A. The blue light channel may include a long wavelength blue LED 2003A having a peak wavelength of 460nm to 470nm and a short wavelength blue LED 2003B having a peak wavelength of 430nm to 440nm, wherein the long wavelength blue LED 2003A and the short wavelength blue LED 2003B are packaged on a single substrate and combined by a wedge-shaped dichroic mirror 2005B; and top-pumped blue light is emitted from a blue laser diode, wherein a fluorescence-converted green light channel may include a green fluorescent plate attached to a reflective surface 2004' and a blue laser emitted from a blue laser diode 2007' that top-pumps the green fluorescent plate. Deep red LEDs and red amber LEDs may be packaged on separate substrates and combined by an X-plate dichroic mirror. As Fig. 22 In the alternative shown, the blue laser diode array module 2109 is configured to be in the green channel and incident on the green fluorescent plate 2104B at an angle to the top of the fluorescent plate. The fluorescent converted green light from the laser top pump will be reflected at the bottom mirror substrate 2104A and enter the green channel. The red channel can include a long wavelength red LED 2101 with a peak wavelength of 640nm to 660nm and a short wavelength red LED 2102 with a red amber peak wavelength of about 620nm, where the deep red LED 2101 and the red amber LED 2102 are packaged on a single substrate and combined by a wedge-shaped dichroic mirror 2106. The combined red, green and blue light will be combined into the coaxial optical path 210 by the dichroic mirror 2105 without increasing the optical etendue to obtain a high brightness optical engine configuration with optical engine output. The illumination light beam will be reflected by the microdisplay and enter the projection optical system through an optical prism; wherein the projection light output in the microdisplay projection system can achieve a high-brightness optical engine output of up to 5000lm.

[0062] As another alternative embodiment of the hybrid laser LED optical engine device according to the present invention, it includes at least a long wavelength red light device having a deep red peak wavelength longer than 630nm, a short wavelength red LED having a red amber peak wavelength of about 620nm, a blue wavelength LED, a fluorescent converted green LED, and at least one green light channel or a deep red light channel includes a laser diode. Fig.23In FIG. 1 , the hybrid laser LED optical engine device also includes a blue laser 2207 channel that emits a blue beam and pumps a phosphor-converted green (CG) LED 2204 from the top of the CG plate. The deep red LED 2201 and the red amber LED 2202 are combined by an X-plate dichroic mirror 2208. The combined red light, phosphor-converted green light, and blue light from the blue light source 2203 will be combined by the dichroic mirror 2205 into the coaxial optical path 220 without increasing the optical etendue to obtain a high brightness optical engine configuration. Fig.24 In the embodiment, the deep red light device 2301' is a deep red laser diode emitting deep red light having a peak wavelength longer than 630nm, wherein the deep red laser light, the red amber LED light from the red amber LED 2302, the blue light from the blue LED 2303, and the fluorescent converted green light from the CG LED 2304 will be combined into the coaxial optical path 230 by the first X-plate dichroic mirror 2308 and the second dichroic mirror 2305 without increasing the optical etendue to achieve an optical engine output of up to 5000lm. The deep red light and the red amber light can be combined by two dichroic plates instead of the X-plate dichroic mirror.

[0063] As Fig.25Another alternative embodiment of the hybrid laser LED optical engine device according to the present invention in , which includes at least one long wavelength red LED 2401 having a deep red peak wavelength longer than 630nm, a short wavelength red LED 2402 having a red amber peak wavelength of about 620nm, at least one blue laser chip 2404 emitting blue light, and a fluorescent conversion green light rotating wheel 2430 having a green phosphor coated on the rotating wheel, wherein the deep red LED 2401 and the red amber LED 2402 are combined by an X-plate dichroic mirror 2408; and the fluorescent conversion green light channel has a green phosphor coated on the rotating wheel 2430, and the blue laser pumps the rotating wheel from the bottom as the transmitted light. The rotating wheel 2430 has a green phosphor coated segment and a blank segment, and the ratio of the green phosphor segment area to the blank segment area depends on the duty cycle of the green light and the blue light used for color mixing in the hybrid optical engine. The blue light will hit the green phosphor segment from the bottom or top to emit transmitted fluorescent converted green light or reflected fluorescent converted green light. The combined red light, the fluorescent converted green light from the blue laser 2404, and the blue laser through the blank segment of the color wheel will be combined into the coaxial optical path 240 by the X dichroic mirror 2408, and will hit the fly-eye array lens 2410 before illuminating the microdisplay panel through the focusing lens for homogenization without increasing the optical extension to obtain a high-brightness optical engine configuration. As an alternative, the deep red light and the red amber light can also be combined through two dichroic plates. The deep red LED and the red amber LED can be packaged on the same substrate, and the two red lights will be combined by a wedge-shaped dichroic mirror. The blue laser can pump the green phosphor segment from the top, and the green phosphor segment is a reflective segment.

[0064] As an alternative, the dichroic X-plate can be replaced by a dichroic light-combining prism or two dichroic mirrors with low-pass, high-pass or single-bandpass filters; the deep red light source can be a deep red LED or a semiconductor laser; the fluorescent conversion green light source can be a green fluorescent plate directly deposited on the top of the blue LED chip, or a fluorescent conversion green rod / tube with multiple blue LED chips attached to the rod / tube, and the surface of the rod / tube is coated with green phosphor; the blue wavelength LED can have a 460nm to 470nm long wavelength blue light (LB) chip 1803A and a 430nm to 440nm short wavelength blue light (SB) chip 1803B packaged on the same substrate according to the required output brightness; the compound eye array lens can be replaced by a hybrid rod or a hybrid hollow tube; and the blue pump light source can be a blue LED light source or a blue laser. It can be seen that the optical engine equipment can be changed to meet different requirements.

[0065] The above embodiments are illustrative but not limiting of the present invention. It should also be understood that numerous modifications and variations are possible based on the principles of the present invention. Therefore, the scope of the present invention is limited only by the following claims.

Claims

1. An optical engine device, comprising: a first light source, the first light source comprising a first green light device configured to emit a green light beam; a second light source comprising a first blue light device configured to emit a blue light beam; a third light source, the third light source comprising a first red light device configured to emit a first wavelength red light beam and a second red LED of a second wavelength red light beam; wherein the first wavelength red light beam is a red light beam having a peak wavelength longer than 630 nm, the second red LED emits a second wavelength red light beam having a peak wavelength shorter than 630 nm, so as to enhance the brightness of the red light beam, and the duty ratios among the green light beam, the enhanced red light beam and the blue light beam will be optimally balanced, and the wavelength difference between the first wavelength red light beam and the second wavelength red light beam needs to be at least 25 nm, so as to reduce the dichroic mirror cutting loss; as well as, a first beam combiner configured to combine the red light beam, the green light beam, and the blue light beam to form a coaxial optical path without increasing etendue; wherein the first beam combiner comprises an X-plate dichroic mirror, a wedge-shaped dichroic mirror or a dichroic light-combining prism with a multi-layer dielectric coating to be used as a low-pass dichroic mirror, a high-pass dichroic mirror or a single-bandpass dichroic mirror, and Wherein, a first light beam from the first light source, a second light beam from the second light source, and a third light beam from the third light source are combined into a coaxial optical path by at least a first beam combiner; and the combined light beam from the coaxial optical path hits a fly-eye array lens for homogenization, and then converged by a condensing lens for use in an illumination system.

2. The apparatus according to claim 1, further comprising: a second beam combiner, the second beam combiner being configured to assist the first beam combiner in forming the coaxial optical path, wherein the second beam combiner comprises at least one dichroic mirror; The first beam combiner can be separated into two dichroic mirrors as the first beam combiner and the third beam combiner, each dichroic mirror comprising a multi-layer dielectric coating plate; and The green light beam, the blue light beam and the red light beam are combined into a coaxial optical path by the first beam combiner and the second beam combiner or the third beam combiner without increasing the optical etendue.

3. The device according to claim 2, further comprising a fly-eye array lens and a focusing lens, wherein: The combined light beams from the coaxial optical path hit the fly-eye array lens for uniformization and are then converged by the condenser lens to illuminate the microdisplay panel at a desired angle.

4. The device according to claim 2, further comprising a mixing rod or a mixing hollow tube and a focusing lens, wherein: The combined light beam from the coaxial optical path hits the mixing rod or mixing hollow tube for homogenization and is then focused by the condenser lens to illuminate the microdisplay panel at a desired angle.

5. The device according to claim 4, wherein: The illumination light beam will be reflected by the microdisplay and enter the projection optical system through the optical prism; wherein the projection light output from the projection optical system in the microdisplay projection system can achieve a high-brightness optical engine output of up to 5000 lm.

6. The device according to claim 1, wherein: The first red light device is a semiconductor LED as a first red LED, which emits a first wavelength red light beam with a peak wavelength between 640nm and 660nm.

7. The device according to claim 6, wherein: The light beams from the chip of the first red LED and the chip of another wavelength LED packaged on the same substrate will enter the same optical channel for light collimation, but the two wavelength light beams enter the wedge-shaped dichroic mirror at different angles and will be reflected by different sides of the wedge-shaped dichroic mirror, wherein the wedge-shaped dichroic mirror is configured to have a wedge angle so that the main axes of the two wavelength light beams after being reflected from two different sides of the wedge-shaped dichroic mirror will overlap into a coaxial optical path without increasing the optical etendue.

8. The device according to claim 6, wherein: The second light source includes a first blue LED and a second blue LED; wherein the peak wavelength of the chip of the first blue LED is 460 nm to 470 nm, the peak wavelength of the chip of the second blue LED is 430 nm to 440 nm, the two blue LEDs are packaged together on the same substrate, and are combined into the coaxial optical path by a wedge-shaped dichroic mirror.

9. The device according to claim 8, wherein: The first beam combiner is a wedge-shaped dichroic mirror, and wherein the chip of the first red LED and the chip of the second red LED or the chip of the first blue LED can be packaged on a single substrate and combined into a coaxial optical path by the wedge-shaped dichroic mirror, and wherein the wedge-shaped dichroic mirror can be replaced by two dichroic mirror plates placed at a certain inclination angle.

10. The device according to claim 1, wherein: The first red light device is a fluorescence conversion red LED having a red fluorescence conversion plate directly deposited on top of a blue LED chip, or a remote fluorescence conversion red light device having a red phosphor deposited on a highly reflective and thermally conductive substrate and the blue light beam pumping the red phosphor from the top side, and the second light source also includes a second blue LED having a peak wavelength between 430nm and 450nm so as to pump the red fluorescence conversion plate from the top of the red fluorescence conversion plate.

11. The device according to claim 1, wherein: The first green light device is a fluorescent conversion green LED having a green fluorescent plate directly deposited on the top of the blue LED chip, or a remote fluorescent conversion green light device having a green fluorescent powder deposited on a highly reflective and thermally conductive substrate and the blue light beam pumping the green fluorescent powder from the top side, or a conversion green rod / tube having multiple blue LED chips attached to a rod / tube, which has green fluorescent powder coated on the surface of the rod / tube, and the second light source also includes a second blue LED with a peak wavelength of 430nm to 450nm, which second blue LED is top-pumped by a blue light beam to pump the green fluorescent plate or the surface of the rod / tube, and the blue light beam is reflected by a dichroic mirror and emitted from the second blue LED.

12. The device according to claim 11, wherein: The third light source also includes a phosphor-converted red LED having a red phosphor plate deposited directly on top of the chip of the blue LED to emit long-wavelength red light having a peak wavelength greater than 630 nm; The optical engine device also includes a fourth light source having a collimating optical device, wherein the fourth light source includes at least a second blue LED; wherein the peak wavelength of the second blue LED is not longer than the peak wavelength of the first blue LED, and the second blue light beam from the fourth light source is used to remotely pump the green fluorescent plate from the top of the green fluorescent plate on the fluorescent conversion green LED, and the top-pumped converted green light will be reflected at the reflective layer of the LED chip of the fluorescent conversion green LED and combined with the bottom-pumped fluorescent conversion green LED light, and then enter the green light beam of the first light source; a fifth light source with collimating optics, wherein the fifth light source comprises at least a third blue LED; wherein a third blue light beam from the fifth light source is used to remotely pump the red fluorescent plate from the top of the red fluorescent plate on the fluorescent converted red LED of the third light source, and the top-pumped fluorescent converted red light will be reflected at the reflective layer of the LED chip of the fluorescent converted red LED and combined with the bottom-pumped fluorescent converted red LED light before entering the red light beam of the third light source; and Wherein, the green light beam, the blue light beam, the red light beam, the second blue light beam and the third blue light beam are combined into a coaxial optical path by the first beam combiner and the second beam combiner; and the combined light beams from the coaxial optical path hit the fly-eye array lens for homogenization, and then converged by a condensing lens for use in the lighting system.

13. The device according to claim 1, wherein: The first blue light device and the first red light device are laser light sources or other semiconductor light emitting devices.

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