TWI684058B - Projection system - Google Patents

Abstract

A projection system, comprising a projector and a shield, the shield has a plurality of light exits, each of the said light exits may correspond to an illuminating light and an image light respectively. Moreover, the axial direction of the said exits has a minimum included angle smaller than a pre-determined value formed therebetween.

Description

Projection system

The invention relates to a projection system, especially a projector integrated into other devices.

Despite the development of projection for many years, the demand for projection has not been reduced. How to combine traditional speculative equipment with other devices to create a combination of different industries and enhance the application of projection has always been one of the industrial development goals. For example, the combination of projection and lighting, or using the original lighting architecture to create a new projection architecture, is a new technological development thinking.

According to one aspect of the present invention, a projection system is provided, which includes a projector and a housing. The housing has two light outlets with different axial directions, and the minimum angle between the two light outlets in the axial direction is between 20 degrees and 170 degrees. . In addition, the system is also provided with a projector, which is arranged in the housing. The projector has a projection lens, and the projection lens faces one of the light outlets. And according to the needs of changing the position of the projector, so that the projection lens toward another light outlet.

According to another aspect of the present invention, a projection system is provided which, combined with an illumination system, includes a lampshade, a light source, and a projector. The lampshade is provided with a first light outlet and a second light outlet. The light emitting direction of the light source is toward the first light outlet. The projector is disposed in the lampshade, and the projection lens of the projection mirror faces the second light outlet.

In order to make the present invention more obvious and understandable, the following uses the embodiments and the accompanying drawings to explain in detail as follows.

1‧‧‧Projection system

2‧‧‧Projection screen

3‧‧‧ Bearing surface

10‧‧‧Projector

12‧‧‧Light source

121‧‧‧Lighting element

122‧‧‧Spectroscope set

123‧‧‧ lens group

124‧‧‧Reflecting mirror

125‧‧‧Light homogenization components

126‧‧‧Relay lens

127‧‧‧ total reflection prism

128‧‧‧Lighting optics group

14‧‧‧ light valve

15‧‧‧ dustproof shell

16‧‧‧Projection lens

161‧‧‧First lens group

162‧‧‧Second lens group

20‧‧‧Outer cover

20C‧‧‧Shape center

22‧‧‧Main opening

22‧‧‧First light outlet

22A‧‧‧spindle

22C‧‧‧Shape center

23‧‧‧Rack

24‧‧‧Side opening

24‧‧‧Second light outlet

24A‧‧‧Axis side line

24C‧‧‧Shape center

25‧‧‧Steering mechanism

251‧‧‧Fixed rod

26‧‧‧Ventilation holes

27‧‧‧Outer wall

28‧‧‧cover

28A‧‧‧Touch sensor

29‧‧‧hole

30‧‧‧Lamp

31‧‧‧ substrate

32‧‧‧Light source

33‧‧‧Uniform

40‧‧‧Dock

442‧‧‧Hollow Department

444‧‧‧groove

50‧‧‧support rod

51‧‧‧The first rod

52‧‧‧The second rod

53‧‧‧The third rod

54‧‧‧Rotary fastener

60‧‧‧Mobile joint

62‧‧‧Ball

622‧‧‧Perforation

64‧‧‧Slot parts

642‧‧‧Perforation

IL‧‧‧Light

IS‧‧‧ narrow side

K1, K2‧‧‧Cable

PL‧‧‧Image light

PM‧‧‧Max projection surface

OS‧‧‧ Magnified side

R1‧‧‧First connection

R2‧‧‧Second connection

S‧‧‧ Aperture

L1~L7‧‧‧Optical components

L51, L52‧‧‧ lens

L61, L62‧‧‧ lens

θ‧‧‧minimum included angle

FIG. 1 depicts a schematic diagram of the projection system of the first embodiment of the invention.

FIG. 2A depicts a perspective schematic view of the projector in the first embodiment.

FIG. 2B depicts a schematic diagram of the internal structure of the projector in the first embodiment.

FIG. 2C depicts a schematic diagram of the internal structure of the projection lens in the first embodiment.

FIG. 3 depicts a schematic diagram of the lamp in the first embodiment of the invention.

FIG. 4A depicts a schematic diagram of the outer cover in the first embodiment.

FIGS. 4B to 4E respectively illustrate schematic views of the cover in the first embodiment from different viewpoints.

FIG. 5 depicts a schematic diagram of the base in the first embodiment.

FIG. 6 depicts a schematic diagram of the support rod in the first embodiment.

FIG. 7 depicts a schematic diagram of the combination of components in the first embodiment.

FIG. 8 is a schematic diagram illustrating the relative relationship of the components in the second embodiment.

An embodiment of the present invention provides a lamp-type projection system with a special light direction design. Please refer to FIG. 1, which illustrates a schematic diagram of a projection system according to a first embodiment of the present invention. As can be seen from the figure, the projection system 1 of this embodiment includes a projector 10; a cover 20; an illumination device 30; a base 40 and a supporting rod )50. The support rod 50 is fixed on the base 40 to maintain the cover 20 and the projector 10 disposed therein at a height; and the projector 10 in the lamp cover 20 can be wirelessly or wired from an external device, such as a mobile phone , Hard drive or Internet server to obtain image information. The image light PL is projected on the projection screen 2 through the lateral opening 24 (or light exit) of the cover 20. Furthermore, at least part of the lamp 30 is disposed in the housing 20 to output an illumination light IL through the main opening 22 of the housing 20; here, the main opening 22 of the housing may be a lighting opening.

Generally speaking, the projector 10 refers to an electronic device that can generate image light PL and project an optical image. In one aspect of the present invention, when simplified, the projector 10 may include a projection lens, a light source, an illumination optical module, and a light valve. The light source serves as a projection light source, and provides illumination light for projection to the light valve through the illumination optical module. The light valve converts the projection illumination light into image light PL and then projects it to a projection screen 2 through the lateral opening 22 through the projection lens. Here, the lateral opening 24 of the outer cover may be a projection opening.

The light source may include a light emitting diode chip package that outputs visible light, or a combination of light emitting elements such as laser diodes and wavelength conversion materials; or any other such as metal halide bulbs, UHE or UHP, etc., which may be suitable for lighting Or projection light source components can be collectively referred to as light-emitting components. In addition to the light-emitting elements, the light emitted by the light-emitting elements is adjusted by the illumination optical element group. Illumination optics group can include collimating lens, homogenizing element (such as lens matrix or integrating column), or according to the difference of light source, add color wheel, beam splitter, total internal reflection prism (TIR PRISM), lens with diopter ( For example, a field lens), or other optical elements that can adjust the projection illumination light emitted by the light emitting element.

In addition, the light valve can be a digital micro lens device (DMD), liquid crystal (LCD), or other device or device that has the function of converting the illumination light IL into image light PL and driven by electrical energy; in addition, the light valve can It can also be replaced by a non-power-consuming element, such as a projection film with a pattern on the surface or a photographic film, for example.

The projection lens may be composed of at least one optical lens, which is used to adjust the light beam output from the light valve to make projection on the projection surface. In addition, the projector 10 may be provided with a dust-proof casing to cover the aforementioned projection light source, light valve, lens and other components, but it may not be provided, and it is simply replaced by the outer cover 20.

Please refer to FIG. 2A and FIG. 2B together. FIG. 2A and FIG. 2B respectively depict a three-dimensional schematic diagram of the projector and its internal structure in the first embodiment. In this embodiment, the projector 10 has a dustproof housing 15 and a light source 12, a light valve 14 and a projection lens 16 accommodated therein. In this embodiment, the dust-proof housing 15 has a fan and a perforation for heat dissipation. As shown in the drawing, in this embodiment, the air outlet surface of the fan may be substantially upward, so that the cold air flows from the side of the cover 20 The opening enters and takes away the thermal energy of the projector 10 and then leaves the cover body through the heat dissipation perforation at the top of the outer cover 20.

In this example, the projection light source 12 may include three light-emitting elements 121 of different colors, such as the light-emitting diode package 121, which can respectively turn out different colors of R, G, and B. The light emitted by the three light emitting element packages 121 can be processed by the illumination optical element group 128 and enter the light valve 14. More specifically, after the light enters the illumination optical element group 128, it will first form an illumination light for projection through a beam splitter group 122, and the three light emitting elements 121 are arranged in different positions, and this beam splitter group 122 can also be used Replaced by the combination filter group. The illumination light for projection is adjusted by the lens group 123, and then passes through a light homogenizing element 125 through a reflector 124. The light passes through a relay lens 126 and a total reflection prism 127 to extend the back focal length to enter the light Valve 14. In this embodiment, the light homogenizing element 125 is an array lens (Flyeye Lens). The light valve 14 converts the projection illumination light into the image light PL, outputs it, and is reflected by the total reflection prism and enters the projection lens 16. In this embodiment, the light valve 14 is a digital micro lens device (DMD) chip using digital optical processing technology (DLP). The foregoing wafer may have a rectangular reflective surface with a diagonal size of about 0.47 inches. The reflective surface has a plurality of micro-mirrors, and each micro-mirror has a height and width of 5.4um, and each micro-mirror As a pixel, the wafer has 1920 and 1080 pixels in the height direction and the horizontal direction, respectively. The height (H) and width (V) of the effective area of the wafer are approximately 10.37 mm and 5.832 mm, respectively.

Please refer to FIG. 2C, which illustrates a schematic diagram of the internal structure of the projection lens in the first embodiment. As can be seen from the figure, in this embodiment, the projection lens 16 includes a first lens group 161 and a second lens group 162, and the two are separated by an aperture S. The first lens group 161 is a movable focus group, and the first lens group 161 includes four optical elements L1 to L4, and the refractive power of each optical element is sequentially negative, negative, positive, and positive. In this embodiment, the optical The elements L1~L4 are respectively a lens. The second lens group 162 includes three optical elements L5 to L7, and the refractive power of each lens is negative, positive, and positive, respectively. Among them, the optical elements L5 and L6 are double cemented lenses, that is, the optical elements L5 and L6 are respectively formed by cementing two lenses L51, L52 and lenses L61 and L62. The power of lens L51 is positive, the power of lens L52 is negative, the power of lens L61 is positive, and the power of lens L62 is negative. Furthermore, the cemented lenses mentioned in the examples of the present invention are not limited to the use of adhesive bonding, but they can also be fixed to each other by means of mechanisms or other methods, and the present invention is not limited thereto.

For the detailed parameters of each element in the optical system of this embodiment, please refer to Table 1 to Table 2 below.

Table 1 records the values of the optical parameters of each lens in the optical system. The * in the surface number indicates that the surface is an aspheric surface; otherwise, it is a spherical surface. The surface number refers to the arrangement order of the surfaces of the optical elements arranged from the enlargement side to the reduction side of the lens 10. In addition, the units of radius and thickness/distance in Table 1 are millimeters (mm). TIR can refer to total reflection prism; CG can refer to cover glass.

It can be known from the foregoing table that, in this embodiment, the projection lens 1 includes seven optical elements with diopters, a total of nine lenses. In the first lens group 11, the three surfaces of the three optical elements L1 to L3 that are adjacent to each other and continuously arranged are aspherical surfaces. In the second lens group 12, both surfaces of the lens having the dioptre closest to the reduction side are aspherical surfaces.

The purpose of using aspherical design for optical components L1 and L7 is to improve the distortion of the system; the purpose of using aspherical surface for optical components L2 and L3 is to alleviate the severe spherical aberration that may occur in the lens system in the large aperture design (Spherical aberration ) And coma (Coma). The design of the optical elements L5 and L6 using cemented lenses is to achieve a small chromatic aberration of the lens system. It should be noted that the double cemented lens has better resistance to opening than the triple cemented lens, and when two double cemented lenses are used, the total length is usually shorter and the benefit is relatively better. The term “glue” mentioned above refers to the phenomenon in which the colloid between lenses deteriorates the lenses due to the temperature difference.

In addition, in one aspect of the present invention, the second lens group 12 should include a lens with an Abbe number greater than 70, 80, or 90. When the Abbe number is greater than 70, the effect is already obvious, and when it is greater than 80, the effect is better, and when the Abbe number is more than 90, the effect is best. In the first embodiment, the lens L51 of the two cemented lenses in the second lens group 12 uses a lens with an Abbe number of about 94 to achieve better optical quality, but due to the higher Abbe number The cost of the lens is much higher than that of the general lens, so the design should take into consideration the cost to decide what kind of lens to use. In addition, the semi-diameter (Semi Diameter) of the lens L1 having the refractive power closest to the magnification side of the first lens group is less than 14 mm.

As for the design parameters of each aspheric surface in this embodiment, Table 2 is as follows:

The corresponding operation formula is formula (1), as follows:-

In addition, when the total length of the lens is less than 100mm, the effect is better, and when the total length is less than 90mm, it is better, and when it is about 80mm, the effect is best. A method of calculating the total lens length (TTL) is that the intersection of the surface of the first lens with diopters facing the magnification side and the optical axis from the lens on the magnification side, and the face of the first lens with diopters from the reduction side Reduce the distance between the intersection of the surface on the side and the intersection on the optical axis. And when needed, another method of calculating the total length (TTL) is the intersection point between the surface of the first side mirror with diopter that faces the magnification side and the optical axis, and the intersection between the light valve and the optical axis Total length. In the first embodiment, the total lens length is the total distance from surface S1 to surface S17, which is 81.147 mm.

The ratio of the total lens length (TTL) of the optical system divided by the effective focal length (EFL) is less than or equal to 12. However, if the TTL/EFL value is less than 10, the effect is better, and when the aforementioned ratio is less than 8, the effect is best. In this embodiment, the total lens length is 81.147 mm, and the EFL is 12.98 mm, so the ratio between the two is about 6.25.

In addition, the projection ratio of the lens depends on the conditions, and is generally less than 3; when the conditions are better, it will be less than 2, and in the first embodiment, the projection ratio of the lens is about 1 to 1.3 and about 1.24 . As for the optical distortion (Optical Distortion), the effect is better when it is less than 1%. Taking the first embodiment as an example, the amount of deformation is less than 0.25% and is about 0.18. Furthermore, the aperture (F/#) value varies depending on the details of the design, but the aperture value is preferably less than or equal to 3.6, and more preferably less than or equal to 2.0. Taking the first and second embodiments as examples, They are all about 1.7.

Furthermore, the maximum field of view (FOV) of the projection lens 10 is preferably greater than 80 degrees, and more preferably greater than 120 degrees. In the first embodiment of the present invention, the maximum field of view (FOV) is about 140 degree.

Generally speaking, the projection system 1 can optionally include a lamp 30, which is disposed in the housing 20 and used to generate and output an illumination light IL. Generally speaking, a lamp refers to a device that can output illumination light. The aforementioned illumination light IL refers to a light beam whose main function is to output illumination, usually visible light.

Please refer to FIG. 3, which illustrates a schematic diagram of the lamp in the first embodiment of the present invention. The lamp 30 includes a substrate 31, an illumination light source 32, and a homogenizing sheet 33. The illumination light source 32 includes a plurality of white light emitting diode chips packaged and arranged in a matrix. The illumination light source 32 is electrically connected to the substrate and outputs an illumination light IL to the homogenizing plate 33. The homogenizing sheet 33 outputs the illumination light source 32 After the beam is homogenized, the output is regarded as the lighting effect.

The outer cover 20 (which can be a lampshade, light collecting cover or general cover) in the projection system 1 is hollow frusto-spherical, hollow rectangular, hollow frusto-conical, other hollow solid polygonal, or for example dome-shaped, etc. Hollow three-dimensional structure with regular or irregular shape. The material of the outer cover 20 may be transparent, translucent or opaque. In addition, the inner surface of the outer cover 20 may be polished, coated with reflective paint, or provided with reflective elements, depending on the material used. The effect of concentrated illumination light IL. The cover 20 may be made of a single material or assembled from multiple components.

A housing space may be provided inside the housing 20 for housing, for example, the projector 10 and the lamp 30, and the housing 20 includes a first light outlet 22 and a second light outlet 24. In addition, the light outlet, opening, and perforation It may be provided with a dustproof sheet formed of materials such as glass or plastic, or an optical element with a specific function. That is to say, the light exit, opening, and perforation are sufficient to effectively penetrate the light, and the presence or absence of lens-like light-transmitting elements is arranged in it, which does not affect its identification as a light exit or opening. Furthermore, the minimum angle θ of the two light outlets in the axial direction is less than 170 degrees. The two light outlets mentioned above can respectively pass the image light PL and the illumination light IL. When the illumination light source is not provided with a light homogenizing plate, the cover 20 may be selectively provided with a light homogenizing plate relative to the light outlet of the illumination light IL, so that the illumination light IL is relatively uniform.

In addition, depending on the heat dissipation requirements, in addition to the two light outlets 22 and 24 mentioned above for outputting the projection beam and the illumination light IL, the cover 20 may further include one or more heat dissipation holes provided at the top of the cover To allow air to circulate upward through the heat dissipation holes to dissipate heat to the projector 10.

In addition, the ratio of the length, width and height of the outer cover 20 is not too limited in the design, but considering the factors such as heat dissipation and space use, the maximum length of the outer cover 20 in the axial direction of the main opening 22 except the outer opening of the outer cover 20 in the lateral opening 24 When the ratio of the maximum length in the axial direction is between 0.3 and 5, it has improved effects; when it is 0.5 to 3, its effect is better; when it is 0.5 to 1.5, the effect is better. In this example, the aforementioned ratio is about 0.5.

Please refer to FIG. 4A to FIG. 4B, which respectively illustrate schematic views of the outer cover in various viewing angles in the first embodiment. As can be seen from the figure, in this embodiment, the outer cover 20 has a substantially dome shape, and is made of an opaque sheet metal material. The outer cover 20 has an outer wall 27, which can surround the semi-open receiving space 21 and form a main opening 22 (or first light outlet). In addition, the surface of the outer wall 27 is provided with a lateral opening 24 (also called a second opening or a second light outlet), and the lateral opening 24 is opened on the outer wall 27 so that the accommodating space 21 can communicate with the outside world. In use, in this example, the direction of the lateral opening 24 is substantially perpendicular to the main opening 22 and faces the projection screen 2. In this embodiment, the meaning of the opening (regardless of the first or second) is not necessarily a substantial opening, but the penetration of light blocking is relatively low relative to the outer cover 20, allowing light (illumination light or image light) to pass through The amount is larger. Therefore, the so-called opening may also be formed using a transparent or translucent material.

In the present embodiment, the lateral opening 24 has a closed rectangular shape and its performance is smaller than that of the main opening 22. In this embodiment, the ratio of the area of the lateral opening 24 and the main opening 22 is about 20, and generally, the ratio is between 5 and 25. In different embodiments, the ratio may be in the range of 5-15, 15-25, 25-50, etc. or its intermediate value.

Furthermore, a cover 28 is provided inside the outer cover 20 relative to the lateral opening 24 to allow the user to close the lateral opening 24 when needed. In this embodiment, the cover 28 is a sliding door, but according to design requirements, it can also be replaced by a flip cover or other forms of cover.

In addition, as can be seen from FIG. 4B, in one embodiment, the axial direction of both the lateral opening 24 and the main opening 22 is at a minimum included angle θ of approximately one hundred and ten degrees. In this view, the axial direction may refer to the extending direction of the axis of the opening at the opening. However, the minimum included angle θ is not limited to the aforementioned one hundred and ten degrees. If necessary, the minimum included angle θ may be between 20 and 170 degrees. More specifically, in this embodiment, the lateral opening 24 and the main opening 22 are defined as the axial direction in a direction perpendicular to the planes that substantially constitute the openings, and the radial direction in the direction parallel to the planes.

Please refer to FIG. 4C, which illustrates a schematic diagram of another embodiment. In this embodiment, the lateral opening 24 and the main opening 22 are respectively provided with an axis, which is temporarily called the lateral axis 24A and the main axis 22A. The aforementioned two axes respectively refer to the central axis of the corresponding opening. The central axis of an opening may be the connection between the center of the plane surrounded by the edge of the opening and the center of the outer cover 20.

Please refer to FIG. 4D, which depicts a schematic diagram of the outer cover in another embodiment. In this point of view, the projection surfaces of each opening at each angle have a projection, and in each angle of projection, the largest projection performance is called the maximum projection surface PM, the axis of each opening 22A, 24A, refers to The centroid of the area formed by the openings 22 and 24 on the maximum projection plane PM is a line extending in the direction of the normal vector of the maximum projection plane PM.

Please refer to FIG. 4E, which illustrates a schematic diagram of another implementation of the exception cover. In the embodiment, the two closest points between the edges of the main opening 22 and the lateral opening 24 are the minimum angle θ between the first connection R1 and the second connection R2 of the center of mass 20C of the housing 20, respectively. 10 degrees but less than or equal to 90 degrees. More specifically, the minimum included angle θ is greater than or equal to 20 degrees but less than or equal to 45 degrees. In this example, the minimum included angle is approximately 20 degrees.

According to an aspect of the present invention, the base 40 can be placed on a bearing surface 3, such as a floor. The base 40 may be provided with an accommodating space to become a hollow box, and the hollow portion therein may accommodate devices or components such as counterweights, power modules, hosts, and speakers (such as speakers). The power module may include a transformer, which may be adapted to convert AC power into DC power that can be used by the projection system 1. The host may include at least one of wireless electronic modules, electronic signal input/output (I/O) modules and interfaces, touch electronic modules, electronic memory modules, and electronic storage modules, and may The motherboard is coupled to the aforementioned. However, when necessary, in addition to the weight, the aforementioned components can be wired or wirelessly connected to the projector 10 or can be partially or fully integrated into the projector 10. The electronic signal input interface can be compared with the interface of image transmission protocol such as VGA or HDMI. In addition, a coating material may be provided on the surface of the hollow box, and the coating material may include natural or artificial stone. The hollow box itself can also be used as the resonance cavity of the aforementioned horn.

The aforementioned wireless electronic module can also be installed in the projector, and can be used to wirelessly transmit or exchange information with external electronic devices, such as a wireless electronic communication module that conforms to a specific communication protocol. The aforementioned specific communication protocols may include Bluetooth, WIFI, mobile communication protocols of various generations, Zigbee, BLE, NFC, RF and other wireless communication solutions or combinations thereof. The electronic storage module generally refers to a hard disk that can save data even in the absence of external power, such as USB, a flash memory card, and other electronic components. The electronic memory module can provide the effect of temporary data storage.

Please refer to FIG. 5, which illustrates a schematic diagram of the base in the first embodiment. In this example, devices or components such as a transformer, a host, a speaker, etc. are integrated inside the projector, so only the counterweight is accommodated in the hollow portion 442 of the base 40. In addition, one side of the base 40 may have a signal transmission port or a connecting cable, which are all coupled to the projector 10 for users to exchange data or transmit data to the projector or the host by wired means. In addition, at least a part of the exterior of the base 40 is covered with artificial stone, and at the same time, one side of the base 44 has a groove 444 extending in the direction of gravity for the support rod 50 to be embedded therein.

Generally speaking, the support bar 50 can support the weight of the projector and the cover from above or below. When supported from above, it can be called a boom or suspension bar, but its shape is not necessarily elongated. In some cases, it may be thick and short and integrated with the base 40. In one embodiment, both ends of the support rod 50 are directly or indirectly connected or coupled to the base 40 and the housing 20 or the projector 10, respectively, for maintaining the housing 20 and the devices and components therein at a height. The support rod 50 can adopt a multi-stage extension rod design, and each section can be selectively accommodated with each other and extended or shortened for extension, and the telescopic rod body design of each section also allows each part of the support rod 50 body to extend along The direction is the axial rotation, thereby adjusting the horizontal angle of the cover 20. That is to say, the support rods 50 can be respectively composed of a plurality of hollow tubes with the same shape or different shapes.

In addition, one end of the support rod 50 relative to the housing 20 can be directly or indirectly connected or coupled to the housing 20 or the projector 30 through a movable joint. Depending on the design, one end of the movable connector can be fixed to the support rod 50, and the other end can be installed at the through hole 29 of the housing 20 or at the projector. The movable joint may be a unidirectional joint or a universal joint, or other devices or components that can move the relative positions of the two ends of the joint. In this embodiment, it is a universal joint. Preferably, the housing 20 is allowed to rotate with a degree of freedom of two or more using the contact as a fulcrum. Alternatively, one side of the movable joint is fixed to the projector 10 or its rack, and the projector 10 or its rack and the cover are fixed to each other, and similar effects can be achieved.

The degree of freedom mentioned above refers to the ability of the object to move and rotate relative to the reference point along the three axes of XYZ after excluding a reasonable tolerance. For example, when the degree of freedom is 0, the object cannot move and rotate. When the degree of freedom is 1, the object can be moved or rotated along any of the three axes of XYZ; and when the degree of freedom is six, the object can be simultaneously The three axes of XYZ are movement and rotation. The movable joint may refer to, for example, a universal joint, a slide rail, a boom, or a flexible rope. In addition, the connection between the support rod 50 and the outer cover 20 is not limited to having a movable joint. If necessary, the support rod 50 can also be a modified support material, such as a coiled tube, for example.

Please refer to FIG. 6, which illustrates a schematic diagram of the support rod in the first embodiment. In this embodiment, the support rod 50 is composed of three hollow rods combined with each other. The thickness of each rod body decreases gradually from the base 40 to the cover 20. In this embodiment, a rotation fastener 54 can be used to fix each rod body. When the rotation fastener 54 is locked, the rods are fixed to each other and can prevent the first rod body 51 and the second rod. The body 52 moves or rotates in the extending direction. When the rotation fastener 54 is in the active state, the rotation fastener 54 allows each horizontal rotation or displacement or rotation along the extending direction of the rod body to adjust the direction and vertical position of the cover 20.

The rotating fastener 54 can be any connecting member that can achieve the upper opening function. In this embodiment, the rotating fastener 54 is a rotating cap with a thread on the inside. When used, the thinner rod body is fitted into the thicker In the hollow pipe body, the outer diameter of the opening of the thicker hollow pipe body is engraved with a thread, and several grooves are formed at the edge thereof which are substantially perpendicular to the thread. When the rotating cap is sleeved on the thread of the opening and is locked, the opening is gradually elastically deformed inward and contracted, whereby the position of the outer rod and the inner rod can be fixed.

In this embodiment, the end of the support rod 50 includes an opening, and the opening communicates with the interior of the base 40 through the internal space of each telescopic rod, whereby, if necessary, the cable K1 or At the same time, the signal cable K2 and the like can be connected to the hollow portion of the base 40 via the internal channel of the support rod 50.

In this embodiment, the opening at the end of the support rod 50 is provided with a movable joint 60, and the movable joint 60 is a universal joint 60. The universal joint 60 includes a ball 62 and a groove 64, which are respectively disposed at the opening 29 of the outer cover 20 and open at the end of the connecting rod 50, so that the outer cover 20 can be along the three axes relative to the ball 62 Rotate, that is, its degree of freedom is three. The ball member 62 and the groove member 64 of the universal joint have corresponding holes 622 and 642 respectively. In this way, the cable can pass through the perforation of the movable joint 60 and the opening 29 of the outer cover 20 into the outer cover 20 through the hollow space 442 in the base 40 through the inner space of the support rod 50. In this embodiment, the opening 29 is provided on the other side of the cover relative to the main opening 22.

After combining the aforementioned components, the operation method of the projection system will be described below. Please refer to FIG. 7, which illustrates a schematic diagram of the combination of components in the first embodiment. As can be seen from the figure, the support bar 50 extends upward from the base 40 and then suspends the cover 20, the projector 10, and the lamp 30 at a height. The projector 10 and the lamp 30 can be installed in the cover 20 at the same time, but can also be partially inside the cover, not limited to the complete embedding, and the part of the projector 10 and the lamp 30 can be exposed to the cover 20 when needed . The lens of the projector 10 faces the lateral opening 24 of the housing 20 so that the projected light beam can output the housing 20 through the lateral opening 24. The lamp 30 faces the main opening 22 of the outer cover 20 so that the illumination light IL can output the outer cover 20 through the main opening 22. That is, in one embodiment, the light exit direction of the projection light beam is substantially perpendicular to the light exit direction of the illumination light IL. In addition, the cover 20 can rotate about plus or minus about thirty degrees relative to the connecting rod body 50 along the X, Y, and Z axes, respectively. In addition, by adjusting the rotation fastener of the support rod body 50, the cover 30 can be rotated axially relative to the base, and can also be adjusted at an angle relative to the support rod body 50.

In this embodiment, one end of the support rod 50 is fixed to one side of a frame 23, and the frame 23 is simultaneously connected to the housing 20, the projector 10, and the lamp 30, respectively. More specifically, in the present embodiment, the frame 23 is formed by fixing a plurality of plates with rods and screws. On one side of one of the plates facing the seat-facing surface, a lamp 30 is fixedly fixed. On the contrary, the other surface of the plate relative to the lamp 30 carries the projector 10. The aforementioned plate is also connected to the outer cover by the rod body and screws.

In this embodiment, the frame 23 is smaller than the main opening 22. During assembly, the frame 23 can enter the cover 20 from the main opening 22 to be fixed inside the cover 20 by various fixing elements to maintain its height.

Furthermore, in an embodiment, the housing 20 further includes a touch sensor 28A, which is electrically connected or coupled to the lamp 30, the housing 20, or another sensing area. Since the cover 20 in this embodiment is made of a conductive material, the touch sensor 26 can sense the electrical change generated when the user touches the cover 20 through the cover 20, such as capacitance or resistance change (capacitance Touch sensor) to turn the lamp 30 on or off or other functions such as brightness adjustment by a microcontroller embedded in the lamp 30.

Please refer to FIG. 8, which illustrates a schematic diagram of the relative relationship of the components in the second embodiment. As can be seen from the figure, in this example, a steering mechanism 25 with at least one degree of freedom is provided inside the housing 20 to allow the projector 10 itself to rotate between the lateral opening 24 and the main opening 22 for projection. In this embodiment, the steering mechanism 25 includes a pair of fixing rods 251, one end of each fixing rod 251 is indirectly fixed to the housing 20 through the frame 23, and the other side is pivotally mounted on the left and right of the projector 10, respectively Side to allow the projector 10 to rotate relative to the housing 20 within the housing 20. In this embodiment, the degree of freedom of the projector 10 relative to the housing 20 is one. However, it is not limited to this, and various movable nodes with a degree of freedom of 1 to 6 can also be used as the steering mechanism 25 when necessary, and the present invention does not limit this more. In addition, the steering mechanism 25 may also be a component such as a slide rail or an electric rotary joint, which will not be repeated here. In addition, in this embodiment, the projector 10 may be integrated with, for example, an infrared camera and other components for capturing information, such as the contour information of the user's limbs, so that the processor integrated in the projector 10 can The obtained information determines the user's instruction, and can make the image projected by the projector 10 to be adjusted accordingly. In this way, when the projector is in different states, its projection lens faces the aforementioned main opening 22 or lateral opening 24 respectively.

Although the present invention is disclosed as above by the embodiments, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can still design the projection system without departing from the spirit and scope of the present invention, such as a cover The shape and details of the design are modified or changed, and the scope of protection of the present invention is still subject to the scope of patent application.

1‧‧‧Projection system

2‧‧‧Projection screen

3‧‧‧ Bearing surface

10‧‧‧Projector

20‧‧‧Outer cover

22‧‧‧Main opening, first light outlet

24‧‧‧Side opening, second light outlet

30‧‧‧Lamp

40‧‧‧Dock

50‧‧‧support rod

IL‧‧‧Light

PL‧‧‧Image light

Claims (18)

A projection system includes: a housing provided with a first opening and a second opening, the first opening has a first axis, and the second opening has a second axis; and a projector is disposed in the housing , The projector is provided with a projection lens that faces the first opening; wherein, there is a minimum angle between the first axis and the second axis, and the minimum angle is between 20 degrees and 170 degrees . The projection system according to claim 1, further comprising a support rod, and a movable joint is provided between the support rod and the cover. The projection system according to claim 1, further comprising a support rod, and a movable joint is provided between the support rod and the projector. The projection system according to claim 2 or 3, wherein the movable joint is a universal joint. The projection system according to claim 2 or 3, wherein the projector further includes three light emitting elements of different colors, a beam splitter group, a light valve, and a projection lens. The projection system according to claim 2 or 3, wherein the support rod is further connected to a base. The projection system according to claim 2 or 3, further includes a first state and a second state; in the first state, the projection lens of the projector faces the The first opening; in the second state, the projection lens of the projector faces the second opening. A projection system includes: a lampshade with an accommodating space, and a first light outlet and a second outlet; a projector with a projection lens, the projection lens facing the first light outlet; and an illumination light source , The illumination light source faces the second light outlet. The projection system according to claim 8, wherein the projector further includes a light source, a light homogenizing element, and a light valve; the light source can provide an illumination light to the light valve via the light equalizing element, Then the light valve converts the illumination light into image light, and the image is projected through the projection lens. The projection system according to claim 9, wherein the projector further includes a beam splitter set on the path of the illumination light, and the light source includes three light-emitting diodes, and the light-emitting diodes can be Separately output different colors of light. The projection system according to claim 8, wherein the lampshade is further connected to a support rod, and the support rod is connected to a base; meanwhile, the lampshade and the projector are interlockable. The projection system according to claim 8, wherein the projector further includes a movable joint connecting the support rod and the lamp cover. The projection system according to claim 8, wherein the projector further includes an electronic signal input interface, and the interface is HDMI. The projection system according to item 8 of the claim, wherein an accommodation space is provided in the base, and a speaker is provided in the accommodation space. The projection system according to claim 8, wherein the projector further includes a wireless electronic module to receive image information wirelessly. The projection system according to claim 8, wherein the wireless method is Bluetooth communication. The projection system according to item 8 of the claim, wherein the support rod is hollow, and the projection system further includes a power module provided in the accommodating space of the base, with the power cord passing through the hollow support rod To connect to the projector. The projection system according to claim 17, further comprising an image input interface provided in the accommodating space of the base, and connected to the projector by a signal line through the hollow support rod.

Images