TWI459121B - Light apparatus and image projector applied with the same - Google Patents

Description

Light source device and projection device thereof

The present invention relates to a light source device, and more particularly to a light source device applied to a projection device.

In the era when electronic products are full of life, projection devices, including education, business, and home, are very skilled in technological development. For consumers, in addition to high-quality projection quality, its size is also one of the considerations when purchasing a projection device.

Conventional projection devices include, for example, a light source device, a light pipe, a lens module, an imaging element, a lens, and the like. In a projection device, a light source device is used to provide light and focus the light on one end of the light pipe. The light pipe receives the focused light and homogenizes the light. After the light emitted by the light pipe is concentrated to the lens module, the lens module projects the light onto the folding mirror. After being reflected by the folding mirror, the light is projected onto the imaging element. The imaging element receives light and produces an image that the lens accepts and projects the image onto the screen. Among them, the space occupied by the light source device also has a significant influence on the volume of the projection device.

Please refer to FIG. 1 , which illustrates a schematic diagram of a conventional light source device. If a blue laser is used as the light source 11, the emitted light passes through a Condensing lense 12, a Fold Mirror 13 and a Dichroic mirror 15 as shown in the figure, and the color wheel (Color) After the color separation of the Wheel) 18, the light of the light source can generate light of different colors (such as red, green and blue) and focus on one end of the light pipe 19, thereby producing a full color shadow. image. Wherein, the light source 11 and the collecting lens 12, the folding mirror 13 and the dichroic mirror 15 occupy a lot of space (as shown in the figure as an L-shaped space), plus the position of the color wheel 18, the entire light source mode The group has a large volume, which in turn affects the overall size of the projection device.

The invention relates to a light source device and a projection device thereof. The design of the light source module and the arrangement of the light path not only can reduce the occupied space, but also have a good heat dissipation effect.

According to the present invention, a light source device is provided, which is disposed in a housing and includes at least a first light source module and a second light source module. The first light source module includes a first light source that emits a first primary color light and advances along a first light path. The second light source module includes a second light source, a dichroic mirror and a light color conversion component disposed on a second optical path, and the dichroic mirror is disposed on the first optical path and the second optical path, The light emitted by the two light sources is advanced along the second optical path through the dichroic mirror to the light color conversion element to generate a second primary color light, and then reflected by the dichroic mirror to advance the second primary color light along the second optical path. The first primary color light is advanced along the first optical path through the dichroic mirror, and the first light source and the second light source are disposed on different sides.

According to the present invention, there is provided an image projector comprising the light source device as described above, an optical component (such as a light pipe) for receiving light of the first primary color and the second primary color and generating a mixed light, an imaging element (such as DMD) for receiving the mixed light emitted by the optical component and generating an image, and a lens module, accepting the image and allowing the image to be cast Shoot to a screen.

In order to make the above-mentioned contents of the present invention more comprehensible, the following specific embodiments, together with the drawings, are described in detail below:

The embodiment proposes a light source device applied to a projection device, which is designed to reduce the space in which the optical component is placed, thereby reducing the volume of the light source device and the projection device to be applied. The light source device of the embodiment has at least two light source modules, the light source is disposed on different sides, the first light source emits light of the first primary color, and the light emitted by the second light source generates light of the second primary color via the light color conversion element. Among them, the first and second light sources share one dichroic mirror. Moreover, the light sources on different sides are arranged to be more easily dissipated, and the optical performance of the projection device (for example, changing the color of the light) may be prevented from being affected by overheating of the temperature near the light source during operation of the projection device.

The projection device of the application may include: the light source device of an embodiment is disposed in a housing, an optical component, an imaging component, and a lens module. The optical component, for example, a light pipe, can receive uniform light of different primary colors and generate a mixed light; the imaging component, such as a digital micromirror device (DMD), receives the optical component. The mixed light is emitted and produces an image and reflection to the lens module. The lens module accepts the image and projects the image onto a screen.

In the following, two sets of embodiments are proposed, in conjunction with the related drawings to illustrate some, but not all, of the design aspects of the light source device. The same reference numerals are used to designate the same or similar parts. Need to pay attention The drawings have been simplified to clearly illustrate the contents of the embodiments. The scale ratios in the drawings are not specific product ratios, and may be appropriately adjusted according to actual application conditions, and are not intended to limit the scope of the present invention. . Furthermore, the description of the embodiments, such as the details of the structure of the components and the choice of materials, etc., are for illustrative purposes only and are not intended to limit the scope of the invention.

Fig. 2 is a schematic view showing a light source device according to a first embodiment of the present invention. The light source device 2 includes a first light source module 21 and a second light source module 22. The first light source module 21 includes a first light source 211 that emits a first primary color light (such as blue light) and advances along a first light path L1. The second light source module 22 includes a second light source 221, a dichroic mirror 223, and a light color conversion element 225 disposed on a second optical path L2. The dichroic mirror 223 is disposed on the first optical path L1 and the second optical path L2, and the light emitted by the second light source 221 is advanced along the second optical path L2 through the dichroic mirror 223 to the light color conversion element 225 to generate a second The primary color light (e.g., green light) is reflected by the dichroic mirror 223 to advance the second primary color light along the second optical path L2. As shown in the figure, the first primary color light emitted by the first light source module 21 also passes through the dichroic mirror 223 and proceeds along the first optical path L1. The first light source 211 and the second light source 221 are disposed on different sides.

In an embodiment, the first light source 211 and the second light source 221 are, for example, a laser light source, respectively, emitting blue light. Furthermore, as shown in FIG. 1, the light emitted by the first light source 211 is orthogonal to the light emitted by the second light source 221 (but not particularly limited).

In an embodiment, the first light source module 21 can further include a first lens array. The first fly eyes 212 are disposed 211 with respect to the first light source. The first light source 211 emits the first primary color light and then passes through the first lens array 212 to have a first homogenized light (a first homogenized light). After passing through the dichroic mirror 223 of the second light source module 22, the light is advanced along the first optical path L1.

In an embodiment, the second light source module 22 further includes a second lens array 222 and a collimator lens 224. The second lens array 222 is disposed relative to the second light source 221. The dichroic mirror 233 is disposed between the second lens array 222 and the light color conversion element 225. The collimating lens 224 is disposed on the second optical path L2 and in front of the light color conversion element 225. The light emitted by the second light source 221 passes through the second lens array 222 and is a second uniformized light and travels along the second optical path L2, passes through the dichroic mirror 223 and the collimating lens 224, and reaches the light color conversion element 225. Wherein, the collimating lens 224 has a positive effective power, and the second uniformized light passes through the collimating lens 225 to be focused on the light color converting element 225.

In one embodiment, the light color conversion element 225 is, for example, a phosphor plate coated with a second color (eg, green) phosphor. After the second uniformized light is focused by the collimating lens 225 and focused on the light color converting element 225, the second color phosphor is excited to generate a second homogenized light with a second primary color (such as green). a second primary colour). Thereafter, the second uniformized light is reflected by the light color conversion element 225, passes through the collimating lens 224 to the dichroic mirror 223, is reflected by the dichroic mirror 223, and proceeds toward a second direction (eg, parallel x-direction).

In one embodiment, the first uniformized light having the first primary color of the first light source module 21 passes through the dichroic mirror 223 and proceeds toward a first direction (eg, parallel x-direction), as shown in FIG. One direction is parallel to the second direction.

In this embodiment, the light source device 2 further includes a third light source module 23. The third light source module 23 includes a third light source 231, a third lens array 232, another dichroic mirror 233, another collimating lens 234, and another light color conversion element 235. The third light source 231 is, for example, a laser light source that emits blue light. The third lens array 232 is disposed relative to the third light source 231; the light color conversion element 235 has, for example, a third color phosphor and is disposed on the third light path L3; the collimating lens 234 is disposed on the third light path L3 and the light color Before the conversion element 235; the dichroic mirror 233 is disposed between the third lens array 232 and the light color conversion element 235. Similarly, the light emitted by the third light source 231 passes through the third lens array 232 and is a third uniformized light, and proceeds along a third optical path L3, passes through the dichroic mirror 233 and the collimating lens 234 (having a positive An effective refractive power, the third uniformized light system is focused on the light color conversion element 235 and the third color phosphor is excited to generate the third homogenized light (a third homogenized light with a third primary color (such as red) The third primary colour) is then reflected through the collimating lens 234 to the dichroic mirror 233, reflected by the dichroic mirror 233, and advanced in a third direction (eg, parallel x-direction). In one embodiment, the third direction is parallel to the first direction and the second direction.

In addition, in an embodiment, the first light source 211, the second light source 221, and the third light source 231 are respectively disposed on a first heat dissipation component 218, a second heat dissipation component 228, and a third heat dissipation component 238 to improve heat dissipation efficiency. .

In this embodiment, the third light source 231 and the first light source 211 and the second light source 221 are disposed on different sides. In this embodiment, the third light source 231 and the second light source 221 are disposed on different and opposite sides, and the light emitted by the third light source 231 is opposite to the light emitted by the second light source 221 but parallel to the forward direction. The dichroic mirror 233 of the third light source module 23 is perpendicular to the dichroic mirror 223 of the second light source module 22 (at an angle of 45 degrees to the x-direction, respectively).

Fig. 3 is a schematic view showing a light source device according to a second embodiment of the present invention. The second embodiment includes the same components as the light source device of the first embodiment except that the relevant component setting direction of the third light source module 23 is changed. In the first embodiment, the third light source 231 and the second light source 221 are disposed on different sides. However, in the second embodiment, the third light source 231 is disposed on the same side as the second light source 221, wherein the light emitted by the third light source 231 has the same forward direction as the light emitted by the second light source 232. Furthermore, in the second embodiment, the dichroic mirror 233 of the third light source module 23 is disposed in parallel with the dichroic mirror 223 of the second light source module 22. The remaining components of the second embodiment that are identical to the first embodiment are not described herein again.

In the above embodiment, in addition to the use of the lens and the lens array, the light collection efficiency is higher than that of the conventionally used mirror, the optical element design arrangement of the light source device of the embodiment occupies a small space, and the light source device and the projection device thereof can be reduced. volume of. Furthermore, since the laser diode is sensitive to heat, the lower the temperature, the higher the luminous efficiency. In the light source device of the embodiment, at least two light sources are disposed on different sides, and the heat source can be dissipated near the light source during operation of the projection device. The effect is faster without affecting the luminous efficiency.

In conclusion, the present invention has been disclosed in the above embodiments, but it is not intended to limit the present invention. A person skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

11‧‧‧Light source

12‧‧‧ Concentrating lens

13‧‧‧Folding mirror

15,223, 233‧‧ ‧ dichroic mirror

18‧‧‧ color wheel

19‧‧‧ light pipe

2‧‧‧Light source device

21‧‧‧First light source module

211‧‧‧First light source

L1‧‧‧First light path

212‧‧‧First lens array (fly eyes)

218‧‧‧First heat sink assembly

22‧‧‧Second light source module

221‧‧‧second light source

225, 235‧‧‧Light color conversion components

L2‧‧‧Second light path

222‧‧‧Second lens array

224, 234‧‧ ‧ collimating lens

228‧‧‧Second heat sink

23‧‧‧ Third Light Source Module

231‧‧‧ Third light source

232‧‧‧third lens array

238‧‧‧ Third heat sink

L3‧‧‧The third light path

Figure 1 is a schematic view showing a conventional light source device.

Fig. 2 is a schematic view showing a light source device according to a first embodiment of the present invention.

Fig. 3 is a schematic view showing a light source device according to a second embodiment of the present invention.

21‧‧‧First light source module

211‧‧‧First light source

L1‧‧‧First light path

218‧‧‧First heat sink assembly

212‧‧‧First lens array

22‧‧‧Second light source module

223, 233‧‧ ‧ dichroic mirror

221‧‧‧second light source

225, 235‧‧‧Light color conversion components

222‧‧‧Second lens array

L2‧‧‧Second light path

228‧‧‧Second heat sink

224, 234‧‧ ‧ collimating lens

23‧‧‧ Third Light Source Module

231‧‧‧ Third light source

232‧‧‧third lens array

238‧‧‧ Third heat sink

L3‧‧‧The third light path

Claims (13)

An image projector includes: a light source device disposed in a housing, the method comprising: a first light source module including a first light source, the first light source emitting a The first primary color light advances along a first light path; and a second light source module includes a second light source, a dichroic mirror, and a light color conversion element disposed on the first a light path, wherein the dichroic mirror is disposed on the first optical path and the second optical path, and the light emitted by the second light source is advanced along the second optical path and passes through the dichroic mirror to the optical color conversion element to generate a second primary color light, which is further reflected by the dichroic mirror to advance the second primary color light along the second optical path, wherein the first primary color light passes through the dichroic mirror along the first optical path, and the first The light source and the second light source are disposed on different sides; an optical component is disposed behind the light source device and on a side opposite to the first light source, the optical component is configured to receive the first primary color light and the second primary color Light and produce a mixed light; Element for receiving the light rays emitted mixing of the optical assembly and generating an image; and a lens module, receiving the image and the image is projected to a screen. The projection device of claim 1, wherein the first light source module of the light source device further comprises a first fly eye disposed relative to the first light source, the first light source emitting the The first primary color light passes through the first lens array to have one of the first primary colors a first homogenized light with a first primary color and passing along the first optical path after the dichroic mirror; the second light source module further includes a second lens array relative to the second The light source is disposed, and the light emitted by the second light source passes through the second lens array to be a second uniformized light and proceeds along the second optical path, and passes through the dichroic mirror to a second color of the light color conversion element. After the phosphor powder, a second homogenized light with a second primary color is generated, and then reflected by the dichroic mirror to continue along the second optical path, wherein the dichroic mirror is set Between the second lens array and the light color conversion element, wherein the optical component is configured to receive the first uniformized light having the first primary color and the second uniformized light having the second primary color, And the mixed light is generated. The projection device of claim 2, wherein the second light source module of the light source device further comprises: a collimator lens disposed on the second optical path and in front of the light color conversion component The collimating lens has a positive effective power, and the second uniformized light is focused on the light color conversion element after passing through the collimating lens. The projection device of claim 3, wherein the second light source module of the light source device is reflected by the light color conversion element after the second uniformized light excites the second color phosphor Passing through the collimating lens to the dichroic mirror, being reflected by the dichroic mirror and advancing toward a second direction; and the first light source module has the first homogenization of the first primary color The light system passes through the dichroic mirror and advances in a first direction, the first direction being parallel to the second direction. The projection device of claim 3, wherein the light source device further comprises a third light source module, comprising: a third light source and a third lens array disposed relative to the third light source, the third light source The emitted light passes through the third lens array to be a third uniformized light and proceeds along a third optical path; another light color conversion element is disposed on the third optical path, and the third uniformized light is excited In addition, one of the third color phosphors of the light color conversion element generates a third homogenized light with a third primary color; another collimating lens is disposed on the third light Before the other color light conversion element on the road, the collimating lens has a positive effective refractive power, and the third uniformized light is focused on the other color light conversion element through another collimating lens; another color separation a mirror disposed between the third lens array and the other color conversion element, and when the third uniformized light excites the third color phosphor, is reflected by the other color conversion element, and is further collimated The lens and the other dichroic mirror are The dichroic mirror is reflected and moved toward a third direction, wherein the first uniformized light having the first primary color passes through the dichroic mirror of the second light source module and the other color separation of the third light source module The mirror is advanced in a first direction that is parallel to the third direction. The projection device of claim 5, wherein the third light source and the first light source are disposed on different sides. The projection device of claim 5, wherein the third light source and the second light source are disposed on the same one side, and the light emitted by the third light source is the same as the light emitted by the second light source. In the forward direction, the other dichroic mirror of the third light source module is disposed in parallel with the dichroic mirror of the second light source module. The projection device of claim 5, wherein the third light source and the second light source are disposed on different and opposite sides, and the light emitted by the third light source is opposite to the light emitted by the second light source. (opposite) but parallel to the forward direction, the other dichroic mirror of the third light source module is perpendicular to the dichroic mirror of the second light source module. The projection device of claim 5, wherein the first light source is disposed on a first heat dissipating component, and the second light source is disposed on a second heat dissipating component, the third light source The system is disposed on a third heat dissipating component. The projection device of claim 1, wherein the light source emitted by the first light source of the light source device is orthogonal to the light emitted by the second light source. The projection device of claim 1, wherein the first light source and the second light source of the light source device are respectively a laser light source. The projection device of claim 1, wherein the optical component is located between the light source device and the imaging element, and the light source device, the optical component and the imaging component are arranged in a line direction. An image projector (Image Projector) comprising: A light source device is disposed in a housing, and includes at least: a first light source module includes a first light source, and the first light source emits a first primary color light along a first a first light path is advanced; a second light source module includes a second light source, a dichroic mirror and a light color conversion element disposed on a second optical path, and the dichroic mirror is disposed on The first light path and the second light path, the light emitted by the second light source passes along the second light path and passes through the dichroic mirror to the light color conversion element to generate a second primary color light, and then the color separation The mirror reflection advances the second primary color light along the second optical path, wherein the first primary color light passes through the dichroic mirror along the first optical path, and the first light source and the second light source are disposed on different sides And a third light source module, including a third light source and a third lens array disposed relative to the third light source, wherein the third light source and the first light source and the second light source are disposed on different sides; An optical component for receiving the first primary color light and the first The two primary colors of light produce a mixed light; an imaging element for receiving the mixed light from the optical component and generating an image; and a lens module that receives the image and projects the image onto a screen.