CN216526712U - Vertical projection ray apparatus and projecting apparatus - Google Patents
Vertical projection ray apparatus and projecting apparatus Download PDFInfo
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- CN216526712U CN216526712U CN202123401067.0U CN202123401067U CN216526712U CN 216526712 U CN216526712 U CN 216526712U CN 202123401067 U CN202123401067 U CN 202123401067U CN 216526712 U CN216526712 U CN 216526712U
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Abstract
The utility model relates to a vertical type projection optical machine and a projector, which comprises a light source, a light cone, an LCD screen, a reflector and an imaging lens, wherein the light cone, the LCD screen, the reflector and the imaging lens are sequentially arranged along the transmission direction of emergent light of the light source; an included angle between an optical axis of the light cone and a horizontal plane is c, and the value range of c is more than or equal to 45 degrees and less than or equal to 80 degrees; the included angle between the optical axis of the light reflected by the reflector (6) and the horizontal plane is d, and the value range of d is more than or equal to 0 degree and less than or equal to 15 degrees. The scheme of the utility model can effectively reduce the volume of the projection light machine, and has high brightness and high uniformity.
Description
Technical Field
The utility model relates to the technical field of projectors, in particular to a vertical type projection optical machine and a projector.
Background
LCD projectors are generally composed of an illumination system, an LCD display system, and an imaging system, which images a picture displayed on the LCD onto a screen through a lens based on kohler illumination. Compared to other principles of projectors, such as: DLP or LCos, single-chip LCD projectors are less expensive and simpler to manufacture.
However, the single-chip LCD projectors of the prior art still have some significant disadvantages: on one hand, the LCD light machine has a light source with a small area and an illumination surface with a large area, which increases the design difficulty of the illumination system of the LCD light machine, and is difficult to design a collimation uniform illumination system with high efficiency and small volume. On the other hand, the transmittance of the LCD panel itself is low, and is only about 5% for the C standard light source. This undoubtedly increases the pressure of heat dissipation of the optical engine, so that the single LCD optical engine with a luminance above 250lm has a large volume due to high heat dissipation requirement, and is relatively weak in competitiveness compared with DLP or LCos projectors.
SUMMERY OF THE UTILITY MODEL
In order to solve the above technical problems, the present invention provides a vertical optical projector and a projector, which can effectively reduce the volume of the optical projector, and have high brightness and uniformity.
The technical scheme for solving the technical problems is as follows: a vertical projection optical machine comprises
The light cone comprises a light source, and a light cone, an LCD screen and a reflector which are sequentially arranged along the propagation direction of emergent light of the light source, wherein the light cone is provided with a light inlet surface facing the light source and a light outlet surface facing the LCD screen, and the optical axis of the light cone is obliquely arranged relative to the horizontal plane;
the included angle between the optical axis of the light cone and the horizontal plane is c, and the value range of c is more than or equal to 45 degrees and less than or equal to 80 degrees;
the included angle between the optical axis of the light reflected by the reflector and the horizontal plane is d, and the value range of d is more than or equal to 0 degree and less than or equal to 15 degrees.
The utility model has the beneficial effects that: the included angle between the light cone and the horizontal plane is adjusted, so that the height of the light cone is adjusted, the height of the optical machine is integrally reduced, the included angle between the optical axis of the light cone and the horizontal plane is too small, the integral height of the optical machine is too high, and the size of the optical machine is larger; if the included angle between the optical axis of the light cone and the horizontal plane is too large, the transverse volume of the optical machine is large, and the optical machine is in a overstaffed state, so that the included angle between the optical axis of the light cone and the horizontal plane is 45-80 degrees, the height and the transverse volume of the optical machine can be considered simultaneously, the optical machine is compact in structure, the space utilization rate is improved, meanwhile, the included angle between the reflection light of the reflector and the horizontal plane is 0-15 degrees, the image projected onto the screen is enabled to obtain a large off-axis, and the defect that the projected image can be shielded by the desktop when the projector is horizontally placed on the desktop is avoided.
On the basis of the technical scheme, the utility model can be further improved as follows.
Furthermore, an imaging lens is arranged on the reflecting light path of the reflector.
The imaging lens has the beneficial effects that the imaging lens is used for converging and imaging the reflected light rays of the reflector
Furthermore, an included angle between the plane of the reflector and the optical axis of the light cone is b, and the value range of b is more than or equal to 30 degrees and less than or equal to 60 degrees.
The technical scheme has the advantages that the included angle between the plane of the reflector and the optical axis of the light cone is 30-60 degrees, so that the reflected light of the reflector can be conveniently and horizontally emitted out and received by the lens of the projection mirror, and the projection quality is further improved.
Further, a collimating lens is arranged between the light cone and the LCD screen, and a focusing lens is arranged between the LCD screen and the reflector.
The collimating lens is used for changing the light rays of each point in the aperture diaphragm into a parallel collimated light column, so that the collimation and uniformity of the light rays are ensured, and the collimation degree of the irradiated light rays is improved; the focusing lens is used for focusing and imaging the light rays emitted by the LCD screen.
Further, the distance between the collimating lens and the LCD screen is 10 mm-13 mm, and the focal length of the collimating lens is 60 mm-100 mm.
The further scheme has the advantages that the collimating lens is positioned at the light outlet of the light cone, and in order to avoid the phenanthrene line imaging and guarantee the optical efficiency, the distance between the collimating lens and the LCD screen is set to be 10-13 mm; the focal length of the collimating lens is ensured to be 60 mm-100 mm, and the emergent angle of light rays is increased when the focal length is too large or too small, so that the efficiency and the uniformity of the optical machine are influenced.
Furthermore, the light incident surface and the light emergent surface are rectangular, and the area of the light emergent surface is larger than that of the light incident surface.
The beneficial effect of adopting the further scheme is that the LCD screen is generally rectangular, and the light incident surface and the light emergent surface of the rectangle are matched with the rectangular LCD screen to ensure that the image display of the LCD screen is more uniform.
Further, the length and width of the light incident surface are l and w respectively, the length and width of the light emergent surface are L, W respectively, the length of the side surface of the light cone connecting the light incident surface and the light emergent surface is B, and the following conditions are met simultaneously:
0<(W-w)/2B<1；
0<(L-l)/2B<1。
the beneficial effect of adopting above-mentioned further scheme is that the degree of consistency of emergent ray is guaranteed.
Further, the light source is an LED light source.
The LED light source has the advantages of high brightness and long service life.
Furthermore, the included angle between the side face of the light cone connecting the light incident surface and the light emergent surface and the horizontal plane is a, and the value range of a is more than or equal to 60 degrees and less than or equal to 120 degrees.
The beneficial effects of adopting above-mentioned further scheme are that the contained angle between light cone side and the surface of water is 60 to 120, guarantees the angle of penetrating of the optical axis of light cone, and the light collection efficiency of light cone is high, and the light cone carries out the even light processing to the irradiation light, improves luminance uniformity, because the light collection efficiency of light cone is high moreover, further improves the luminance of ray apparatus.
A projector comprises the vertical type projector light machine.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a light cone according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating a structure of a light cone incident surface viewed from above according to an embodiment of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a light source; 2. a light cone; 201. a light incident surface; 202. a light-emitting surface; 3. a collimating lens; 4. an LCD screen; 5. a focusing lens; 6. a mirror; 7. an imaging lens.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the utility model.
In the description of the present invention, it is to be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "peripheral side", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and simplicity of description, and do not indicate or imply that the system or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
LCD projection instruments are usually composed of an illumination system, an LCD display system and an imaging system, wherein the transmittance of a color LCD screen is low, often around 5%, and most of the light impinging on the LCD screen is converted into heat. Under such conditions, projection manufacturers often design the optical engine to be open, so as to improve the heat dissipation efficiency of the optical engine. The open type optical machine has the defects of dust falling and the like, and has a lower service life. In order to prolong the service life of the optical machine, a scheme of sealing the optical machine is adopted by some manufacturers. However, compared to the open optical engine, the closed optical engine is more difficult to exchange heat with the external environment. Therefore, the volume of the closed light machine under the same power is larger than that of the open light machine.
Based on the above principle and defects, the present invention provides a vertical projection light machine, as shown in fig. 1, fig. 2 and fig. 3, the vertical projection light machine comprises a light source 1, and a light cone 2, an LCD screen 4 and a reflector 6 which are sequentially arranged along the propagation direction of the emergent light of the light source 1, wherein an imaging lens 7 is further arranged on the reflection light path of the reflector 6, the light cone 2 has a light incident surface 201 facing the light source 1 and a light emergent surface 202 facing the LCD screen 4, the light cone 2 is inclined, and an included angle is formed between the optical axis of the light cone 2 and the horizontal plane.
The utility model adjusts the height of the light cone 2 by adjusting the included angle between the light cone 2 and the horizontal plane, thereby integrally reducing the height of the optical machine, and further improving the brightness of the optical machine by limiting the light cone 2 to the irradiated light. The included angle between the irradiation light optical axis i of the light cone 2 and the horizontal plane is C, the value range of C is more than or equal to 45 degrees and less than or equal to 80 degrees, the original height is C, after the irradiation light optical axis i is adjusted to the included angle between the irradiation light optical axis i and the water surface is C, the new height of the light cone 2 is C sinc, and the compressible height of the light cone 2 is C (1-sinc). The included angle between the light axis i of the light cone 2 and the horizontal plane is too small, the whole height of the optical machine is too high, and the size is large; if the included angle between the irradiation optical axis i of the light cone 2 and the horizontal plane is too large, the transverse volume of the optical machine is large, and the optical machine is in a overstaffed state, so that the included angle between the irradiation optical axis i of the light cone 2 and the horizontal plane is 45-80 degrees, the height and the transverse volume of the optical machine can be considered at the same time, the optical machine is compact in structure, and the space utilization rate is improved.
The included angle between the optical axis ii of the light reflected by the reflector 6 and the horizontal plane is d, and the value range of d is more than or equal to 0 degree and less than or equal to 15 degrees. Both the cone of light 2 and the mirror 6 can be adjusted for suitability. In order to obtain a larger off-axis (offset) of the image projected onto the screen and avoid the defect that the desktop may block the projected image when the projector is horizontally placed on the desktop, the angle between the optical axis ii of the reflected light of the reflector 6 and the horizontal plane is 0 to 15 °.
The included angle between the plane of the reflector 6 and the optical axis of the light cone 2 is b, and the value range of b is more than or equal to 30 degrees and less than or equal to 60 degrees. The included angle between the plane of the reflector 6 and the optical axis i of the light irradiated by the light cone 2 is b, and the value range of b is more than or equal to 30 degrees and less than or equal to 60 degrees. According to the law of reflection, when the angle c between the optical axis i of the irradiated light and the horizontal plane is 90 °, the angle d between the optical axis i of the irradiated light and the normal n should be 45 ° in order to make the optical axis ii of the reflected light passing through the mirror 6 parallel to the horizontal axis. When the angle c between the optical axis i of the illumination light and the horizontal plane is changed, if it is ensured that the optical axis ii of the reflection light of the reflector 6 is still parallel to the horizontal axis, the angle between the reflector 6 and the optical axis i of the illumination light of the light cone 2 is adjusted for adaptability, and the angle between the plane of the reflector 6 and the optical axis i of the illumination light of the light cone 2 is 30 ° to 60 ° for realizing the offset (offset) of the light rays later.
A collimating lens 3 is arranged between the light cone 2 and the LCD screen 4, and a focusing lens 5 is arranged between the LCD screen 4 and the reflector 6. Collimating lens 3 is used for becoming the light of every point in the aperture stop a bundle of parallel collimation light column, improves the collimation degree of illuminating light, and light cone 2 combines with collimating lens 3 to guarantee that collimating lens 3's output light is even facula, further improves LCD screen 4's transmissivity, and focusing lens 5 is used for focusing and formation of image to LCD screen 4 outgoing light.
The distance between the collimating lens 3 and the LCD screen 4 is 10 mm-13 mm, and the focal length of the collimating lens 3 is 60 mm-100 mm. The collimating lens 3 is positioned at the light outlet of the light cone 2, and in order to avoid the phenanthrene line imaging and ensure the optical efficiency, the distance between the collimating lens 3 and the LCD screen 4 is set to be 10 mm-13 mm. The focal length of collimating lens 3 should guarantee at 60mm ~ 100mm, to collimating lens 3, because LCD screen 4 has the requirement to the angle of light incidence, need ensure from light cone 2 to the light that collimating lens 3 jets out within certain angle (30 °), too big or undersize all can increase the angle of emergence of light, thereby influence the efficiency and the homogeneity of ray apparatus, the light collimation and the uniformity through collimating lens 3, the light of large angle is behind LCD screen 4, can't pass through imaging lens 7.
The light incident surface 201 and the light emitting surface 202 of the light cone 2 are both rectangular, the area of the light emitting surface 202 is larger than that of the light incident surface 201, the LCD screen 4 is generally rectangular, and the rectangular light incident surface 201 and the rectangular light emitting surface 202 are matched with the rectangular LCD screen 4 to enable the LCD screen 4 to display images more uniformly. The length and width of the light incident surface 201 are l and w, the length and width of the light emitting surface 202 are L, W, respectively, the length of the side surface of the light cone 2 connecting the light incident surface 201 and the light emitting surface 202 is B, and the following conditions are satisfied:
0<(W-w)/2B<1；
0<(L-l)/2B<1。
the parameters of the light cone 2 meet the above conditions, the uniformity of the emergent light of the light cone 2 can be ensured, and the contrast of the optical machine is further improved.
The included angle between the side face of the light cone 2 connecting the light incident surface 201 and the light emergent surface 202 and the horizontal plane is a, d is more than or equal to 60 degrees and less than or equal to 120 degrees, the included angle between the side edge of the light cone 2 and the horizontal plane is 60 degrees to 120 degrees, and meanwhile, the height and the transverse volume of the optical machine are considered, so that the optical machine is compact in structure, and the space utilization rate is improved.
The utility model also provides a projector which comprises the vertical type projection optical machine.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A vertical projection light machine, characterized in that: comprises that
The LED display screen comprises a light source (1), and a light cone (2), an LCD screen (4) and a reflector (6) which are sequentially arranged along the transmission direction of emergent light of the light source (1), wherein the light cone (2) is provided with a light incoming surface (201) facing the light source (1) and a light outgoing surface (202) facing the LCD screen (4), and the optical axis of the light cone (2) is obliquely arranged relative to the horizontal plane;
an included angle between the optical axis of the light cone (2) and the horizontal plane is c, and the value range of c is more than or equal to 45 degrees and less than or equal to 80 degrees;
the included angle between the optical axis of the light reflected by the reflector (6) and the horizontal plane is d, and the value range of d is more than or equal to 0 degree and less than or equal to 15 degrees.
2. The vertical projector engine of claim 1, wherein: an imaging lens (7) is further arranged on a reflection light path of the reflector (6).
3. The vertical projector engine of claim 1, wherein: the included angle between the plane of the reflector (6) and the optical axis of the light cone (2) is b, and the value range of b is more than or equal to 30 degrees and less than or equal to 60 degrees.
4. The vertical projector engine of claim 1, wherein: a collimating lens (3) is arranged between the light cone (2) and the LCD screen (4), and a focusing lens (5) is arranged between the LCD screen (4) and the reflector (6).
5. The vertical projector engine of claim 4, wherein: the distance between the collimating lens (3) and the LCD screen (4) is 10-13 mm, and the focal length of the collimating lens (3) is 60-100 mm.
6. The vertical projector engine of claim 1, wherein: the light incident surface (201) and the light emergent surface (202) are both rectangular, and the area of the light emergent surface (202) is larger than that of the light incident surface (201).
7. The vertical projector engine of claim 5, wherein: the length and width of the light incident surface (201) are l and w respectively, the length and width of the light emergent surface (202) are L, W respectively, the side surface length of the light cone (2) connecting the light incident surface (201) and the light emergent surface (202) is B, and the following conditions are met simultaneously:
0<(W-w)/2B<1；
0<(L-l)/2B<1。
8. the vertical projector engine of claim 5, wherein: the included angle between the side face of the light cone (2) connecting the light incident surface (201) and the light emergent surface (202) and the horizontal plane is a, and the value range of a is more than or equal to 60 degrees and less than or equal to 120 degrees.
9. The vertical projector engine of claim 1, wherein: the light source (1) is an LED light source.
10. A projector characterized by: comprising the vertical projector engine of any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123401067.0U CN216526712U (en) | 2021-12-30 | 2021-12-30 | Vertical projection ray apparatus and projecting apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123401067.0U CN216526712U (en) | 2021-12-30 | 2021-12-30 | Vertical projection ray apparatus and projecting apparatus |
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| CN216526712U true CN216526712U (en) | 2022-05-13 |
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| CN202123401067.0U Active CN216526712U (en) | 2021-12-30 | 2021-12-30 | Vertical projection ray apparatus and projecting apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115016214A (en) * | 2022-07-14 | 2022-09-06 | 北京一数科技有限公司 | Projector with a light source |
| CN115202137A (en) * | 2022-07-20 | 2022-10-18 | Oppo广东移动通信有限公司 | Projection optical system, projection optical module and electronic equipment |
-
2021
- 2021-12-30 CN CN202123401067.0U patent/CN216526712U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115016214A (en) * | 2022-07-14 | 2022-09-06 | 北京一数科技有限公司 | Projector with a light source |
| CN115016214B (en) * | 2022-07-14 | 2024-04-26 | 北京一数科技有限公司 | Projector with a light source for projecting light |
| CN115202137A (en) * | 2022-07-20 | 2022-10-18 | Oppo广东移动通信有限公司 | Projection optical system, projection optical module and electronic equipment |
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