CN117803887A - Optical magnifying device and plane lighting system used therein - Google Patents

Abstract

This application provides an optical amplification device and a planar lighting system to which it is applied. By arranging a scattering light source object and an optical amplification device, the degree of glare is reduced and the light range is consistent with the range of natural light to provide sufficient illumination and at the same time allow people to Enjoy a soft visual experience, as if you are in a natural light environment. By providing a relatively spacious feeling, the overall comfort of use is improved. Whether it is a home, office or public place, users can feel the warmth and comfort of natural light. In addition, unlike the traditional top installation method, this application can be installed and placed at any desired location to adapt to the needs of different places, thereby bringing a more personalized lighting experience.

Description

An optical magnification device and the plane lighting system used therein

Technical field

The present application relates to the field of lighting, and in particular to an optical amplification device and a planar lighting system to which it is applied.

Background technique

In the existing technology, most of the lighting fixtures exist in the form of point light sources or small area light sources. They usually use small luminous area and high luminous intensity to meet the needs of the entire lighting space. Although lighting fixtures with small luminous surfaces have their advantages in lighting effects, they also have some shortcomings that cannot be ignored. First of all, due to the small light-emitting area, its lighting range is also relatively small, which cannot meet the needs of large-scale lighting. In some large spaces, lighting fixtures with small luminous surfaces often require a large number of installations to make up for the shortcomings of their small lighting range, thus increasing the cost of lighting equipment. Secondly, due to the relatively concentrated light of small luminous surface lighting fixtures, it is easy to cause strong glare and bring discomfort to people. Especially when used for a long time, the glare is more obvious and may affect people's visual health. In addition, lighting fixtures with small luminous surfaces also have the problem of high power consumption during use. Although lighting fixtures with small light-emitting surfaces have better lighting effects, their relatively high power consumes a lot of electricity during use, increases electricity costs, takes up a large physical space, and also causes environmental damage. A certain burden.

In the existing technology, the design of the shading angle on the light source structure is used to reduce the occurrence of glare, and the installation height and installation position of different types of lamps need to be designed. Most lighting fixtures for places are therefore limited to the mode of being installed at the top of the place and using light from the bottom. The above still cannot completely prevent the occurrence of glare from lamps. In the existing technology, the problem of glare caused by small light source lamps is also solved by adjusting parameters such as illumination and color rendering index (CRI, Color Rendering Index). However, compared with natural light lighting, the above solutions are still less comfortable in terms of comfort. Big gap.

Contents of the invention

In view of the above-mentioned shortcomings of the prior art, the purpose of the present application is to provide an optical magnification device and a planar lighting system used therein, so as to solve the problems of small light source lamps in the prior art, such as small lighting range, glaring light and high power consumption.

In order to achieve the above objects and other related objects, the first aspect of the present application provides a planar lighting system, including: a scattering light source object and an optical amplification device; the optical amplification device is located on the light path of the scattering light source object, A backlight is provided on the back of the scattering light source, and a backlight image is formed in the space behind the backlight.

In some embodiments of the first aspect of the present application, the scattered light source includes a surface layer facing the optical magnification device, and a scene layer is provided on the surface layer to present the scene on the scene layer on the surface. The backlight image is described.

In some embodiments of the first aspect of the present application, the radiation flux of the backlight image has an inverse relationship with the distance from the backlight image to the optical amplification device, and has a positive relationship with the focal length of the optical amplification device. alternative relation.

In some embodiments of the first aspect of the present application, the radiation flux of the backlight image and the distance from the backlight image to the optical amplification device satisfy the following conditions: φ _v is the radiation flux of the backlight image; φ _u is the radiation flux of the scattering light source object; u is the distance from the scattering light source object to the optical amplification device; f is the focal length of the optical amplification device.

In some embodiments of the first aspect of the present application, the light intensity of the backlight image has an inverse relationship with the area of the scattering light source object, and has a positive relationship with the radiation flux of the backlight image.

In some embodiments of the first aspect of the present application, the light intensity of the backlight image and the area of the scattered light source object satisfy the following conditions: Among them, _Su is the area of the scattered light source object, _Sv is the area of the backlight image, _Iu is the light intensity of the scattered light source object, _Iv is the light intensity of the backlight image, _ru is the radius of the scattered light source object, _rv is the radius of the backlight image, u is the distance from the scattered light source object to the optical magnifying device, v is the distance from the backlight image to the optical magnifying device, and f is the focal length of the optical magnifying device.

In some embodiments of the first aspect of the present application, the light intensity of the backlight image and the radiation flux of the backlight image satisfy the following conditions: Wherein, I _0-u is the light intensity of the scattering light source object in the vertical direction, and I _0-v is the light intensity of the backlight image in the vertical direction.

In some embodiments of the first aspect of the present application, the optical amplification device includes one or more of a single convex lens, a lens array, a single Fresnel lens, a multi-layer lens, and a multi-layer lens array.

In some embodiments of the first aspect of the present application, the scattering light source includes: a scattering LED light source and a scattering OLED light source.

In order to achieve the above objects and other related objects, the second aspect of the present application provides an optical amplification device. The optical amplification device is located on the light path of the scattering light source object. A backlight is provided on the back of the scattering light source object. And after passing through the optical amplification device, a backlight image is formed in the space behind the backlight object.

As mentioned above, an optical amplification device in the lighting field of the present application and a planar lighting system used therein have the following beneficial effects: by arranging a scattering light source object and an optical amplification device, the degree of glare is reduced and the light range is in line with natural light. range to provide sufficient illumination while allowing people to enjoy a soft visual experience, as if they are in a natural light environment. By providing a relatively spacious feeling, the overall comfort of use is improved. Whether it is a home, office or public place, users can feel the warmth and comfort of natural light. In addition, unlike the traditional top installation method, this application can be installed and placed at any desired location to adapt to the needs of different places, thereby bringing a more personalized lighting experience.

Description of drawings

FIG. 1 shows a schematic structural diagram of an embodiment of a planar lighting system of the present application.

Figure 2 shows a schematic structural diagram of an embodiment of a planar lighting system using a lens array according to the present application.

Figure 3 shows a schematic structural diagram of a single lens used in an embodiment of the planar lighting system of the present application.

Figure 4 shows a schematic structural diagram of a plane lighting system using a Fresnel lens according to an embodiment of the present application.

Figure 5 shows a schematic structural diagram of another embodiment of the planar lighting system of the present application.

Figure 6 shows a schematic structural diagram of the focus and image in an embodiment of the planar lighting system of the present application.

Figure 7 shows a schematic structural diagram of the light source object and the pupil plane in an embodiment of the planar lighting system of the present application.

Figure 8 shows a front view of a light source object in an embodiment of the planar lighting system of the present application.

Figure 9 shows a schematic structural diagram of the light source image, light source object and lens in an embodiment of the planar lighting system of the present application.

Figure 10 shows a schematic structural diagram of the image radius, object radius and lens of the plane lighting system of this application.

Detailed ways

The following describes the implementation of the present application through specific examples. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, as long as there is no conflict, the following embodiments and the features in the embodiments can be combined with each other.

It should be noted that in the following description, reference is made to the accompanying drawings, which describe several embodiments of the present application. It is to be understood that other embodiments may be utilized and mechanical, structural, electrical, as well as operational changes may be made without departing from the spirit and scope of the present application. The following detailed description should not be considered limiting, and the scope of embodiments of the present application is limited only by the claims of the published patent. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Spatially related terms, such as "upper", "lower", "left", "right", "below", "below", "bottom", "above", "upper", etc., may be used in the text to facilitate explanation The relationship of one element or feature to another illustrated in the figures.

In this application, unless otherwise clearly stated and limited, the terms "installation", "connection", "connection", "fixing", "holding" and other terms should be understood in a broad sense. For example, it can be a fixed connection or a fixed connection. It is a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

Furthermore, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It should be further understood that the terms "comprising" and "including" indicate the presence of stated features, operations, elements, components, items, categories, and/or groups, but do not exclude one or more other features, operations, elements, components, The presence, occurrence, or addition of items, categories, and/or groups. The terms "or" and "and/or" as used herein are to be construed as inclusive or to mean any one or any combination. Therefore, "A, B or C" or "A, B and/or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C" . Exceptions to this definition occur only when a combination of elements, functions, or operations is inherently mutually exclusive in some manner.

In order to solve the above-mentioned problems in the background technology, the present invention provides an optical amplification device and a planar lighting system to which it is applied, aiming to solve the problems in the prior art of small light source lamps with small lighting range, dazzling light, and high power consumption. question. At the same time, in order to make the purpose, technical solutions and advantages of the present invention more clear, the technical solutions in the embodiments of the present invention are further described in detail through the following embodiments in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the invention and are not intended to limit the invention.

Before further describing the present invention in detail, the nouns and terms involved in the embodiments of the present invention are explained. The nouns and terms involved in the embodiments of the present invention are suitable for the following explanations:

<1>Light source: refers to the actual object or device that produces light, such as light bulbs, the sun, etc.

<2> Light source image: In an optical system, the image formed by a light source object can be a real image or a virtual image.

<3>Focal length: The distance from the focal point of a lens or lens to the center of the lens or lens, used to describe the focusing ability of a lens or lens.

<4>Single lens: An optical element with only one lens, used for focusing, imaging or changing the direction of light propagation.

<5>Lens array: An optical element composed of multiple small lenses, which can be used for beam splitting, focusing or imaging.

<6> Nephilim lens: A special lens design that can reduce spherical aberration and chromatic aberration.

<7> Backlight: In display technology, it refers to a device that provides a light source behind a transparent display panel.

<8> Backlight image: The image formed by the light source generated by the backlight object.

Embodiments of the present invention provide a planar lighting system and an optical amplifying device included in the planar lighting system. As far as the planar lighting system is concerned, the embodiment of the present invention will describe an exemplary implementation scenario of the planar lighting system.

As shown in Figures 1 to 4, a schematic structural diagram of a planar lighting system in an embodiment of the present invention is shown.

FIG1 shows an embodiment of the present invention, in which a planar lighting system comprises: a scattering light source 1, an optical magnifying device 2; the optical magnifying device is located on the light output path of the scattering light source, a backlight is provided on the back of the scattering light source, and a backlight image is formed in the space behind the backlight. An adjustable gap 3 is provided between the scattering light source 1 and the optical magnifying device 2.

In an embodiment of the present invention, the optical amplification device includes one or more combinations of a single convex lens, a lens array, a single Fresnel lens, a multi-layer lens, and a multi-layer lens array.

FIG2 shows a schematic diagram of the structure when the optical magnifying device described in an embodiment of the present invention is a lens array, in which a backlight image, a backlight object 1, a lens array 2A and a gap (Gap) 3 are arranged from left to right, wherein the backlight object refers to a light source device for backlight display, which includes a scattering light source object. When the observer's line of sight observes from right to left, the light emitted by the scattering light source object scatters outward after passing through the gap and the lens array and is received by the observer's eyes. When the eyes receive the reflected light, the light is refracted through the cornea and the lens into the inside of the eyeball. These refracted light rays will form an inverted real image on the retina. Then, the photoreceptor cells on the retina will convert the light signal into a neural signal and transmit it to the cerebral cortex through the optic nerve. In the brain, these neural signals will be processed to form a virtual image of the light source object, so that the observer feels that the light has a sense of space and depth, and produces a feeling that the light source has moved backward for a distance.

Fig. 3 shows a schematic diagram of the structure of the optical magnifying device in one embodiment of the present invention when it is a single lens. Similarly, when the observer's line of sight is observing from right to left, the light emitted by the scattered light source passes through the gap and the single lens 2B and is received by the observer's eyes.

FIG. 4 shows a schematic structural diagram of the optical amplifying device according to an embodiment of the present invention when it is a Fresnel lens. Similarly, when the observer's line of sight is observed from right to left, the light emitted from the scattering light source passes through the gap and the Fresnel lens 2C and is received by the observer's eyes.

In an embodiment of the present invention, the scattering light source includes: a scattering LED light source and a scattering OLED light source.

Among them, LED (Light Emitting Diode) is a kind of light-emitting semiconductor device, which is widely used in lighting, display screens, indicator lights and other fields because of its characteristics of high efficiency, long life and low energy consumption. OLED (Organic Light Emitting Diode) is a type of organic light emitting diode, which uses organic materials as the light-emitting layer to produce self-luminous images. It has high contrast, fast response and wide viewing angle, and is widely used in products such as mobile phones, TVs and wearable devices.

Furthermore, when the above-mentioned scattering light source emits light, the light will be scattered evenly in all directions, thereby uniformly illuminating the entire surrounding environment. Therefore, diffuse light sources can provide uniform illumination throughout the environment without producing strong shadows or obvious light spots. Due to the uniform distribution of light, diffuse light sources can usually provide a more comfortable lighting environment without causing glare or eye fatigue. Diffused light sources are suitable for many occasions, such as home lighting, office lighting, commercial lighting, etc., and can meet the lighting needs of different environments. When the scattered light source hits the surface of an object, it will produce uniform reflection, making the surface of the object look uniform and bright. The above-mentioned scattered light sources include but are not limited to incandescent lamps, fluorescent lamps, LED lamps, etc.

In one embodiment of the present invention, as shown in FIG5 , the scattering light source includes a surface layer facing the optical magnifying device, and a scene layer is provided on the surface layer to present the scene on the scene layer in the backlight image. The lighting effect of the spatial scene is achieved by arranging the scene layer behind the magnifying device. When the light passes through the translucent scene layer, it is received by the human eye through the lens, so that the user feels that the scene is magnified, and it can be adjusted by the focal length and position of the lens to produce virtual images of different sizes and positions. The advantage of the method proposed in the present application is that it allows the audience to feel that the scene is magnified, while the display device itself does not occupy additional space, and is suitable for use in places with limited space.

In an embodiment of the present invention, the radiation flux of the backlight image has an inverse relationship with the distance from the backlight image to the optical amplification device, and has a positive relationship with the focal length of the optical amplification device.

Further, the radiation flux of the backlight image and the distance from the backlight image to the optical amplification device satisfy the following conditions:

Among them, φ _v is the radiation flux of the backlight image; φ _u is the radiation flux of the scattering light source; u is the distance from the scattering light source to the optical amplification device; f represents the focal length of the optical amplification device .

In one embodiment of the present invention, the light intensity of the backlight image has an inverse relationship with the area of the scattered light source object, and has a positive relationship with the radiation flux of the backlight image.

Further, the light intensity of the backlight image and the area of the scattering light source satisfy the following conditions:

Wherein, S _u is the area of the scattering light source object, S _v is the area of the backlight image, I _u is the light intensity of the scattering light source object, I _v is the light intensity of the backlight image, r _u is the radius of the scattering light source object, r _v is the radius of the backlight image, u is the distance from the scattering light source object to the optical amplification device, v is the distance from the backlight image to the optical amplification device The distance, f, is the focal length of the optical magnification device.

Further, the light intensity of the backlight image and the radiant flux of the backlight image satisfy the following conditions:

Wherein, I _0-u is the light intensity of the scattering light source in the vertical direction, and I _0-v is the light intensity of the backlight image in the vertical direction.

The above defines the correlation between the light source object and the backlight image satisfied by the optical magnifying device defined in the present invention and the planar lighting system used therein. The above correlation will be explained below in conjunction with FIG. 6 and FIG. 10 .

Figures 6 to 10 illustrate the relationship between the scattering light source object, the optical amplification device, and the backlight object in an embodiment of the present invention. Specifically, when S sphere represents the area of the spherical surface with radius l and S ₀ is the area of the pupil, the radiation flux φ of the luminous surface can be expressed as shown in Formula 7.

φ＝∫∫I*γds (Formula 7)

Among them, as shown in Figure 7,

I＝I ₀ *Cosθ (Formula 8)

Because the value of θ in an actual planar lighting system is usually less than 5 degrees, the value of Cosθ is approximately equal to 1, resulting in Formula 9:

I≈I ₀ (Formula 9)

The cone angle γ of the light point to the pupil is shown in formula 10.

The unit area of the luminous point is shown in Equation 11.

ds＝dr(r*dα) (Formula 11)

Substituting Formula 8, Formula 10 and Formula 11 into Formula 7 we get:

Among them, the pupil surface radius r ₀ is shown in Formula 13:

r ₀ =l*tan5° (Formula 13)

where l is the distance from the human eye to the light source.

The area of the luminous surface S sphere is shown in Equation 14:

S _ball = 4πl ² (Formula 14)

Substituting Formula 13 and Formula 14 into Formula 12, the radiant flux of the light source object is shown in Formula 15.

As shown in Figures 9 and 10, the positional relationship between the light source image, the light source object and the lens is shown. The relationship between the image distance, object distance and focal length is shown in Formula 16.

The transformed result of Equation 16 is shown in Equation 17.

As shown in Figure 10, the image radius r _u and the object radius r _v are as shown in Formula 4.

The area relationship between the light source image and the light source object can be expressed by Formula 3.

Substituting Formula 4 into Formula 3, you can get Formula 18 to Formula 19.

Then the luminous flux of the light source object is shown in Formula 20:

φ _u =∫I _u ds∫dθdφ (Formula 20)

The luminous flux of the light source image is shown in Equation 21:

φ _v =∫I _V ds∫dθdφ (Formula 21)

When the loss caused by the lens is approximately equal to 0, the luminous flux of the light source object can be considered to be equal to the luminous flux of the light source image, and formula 22 and formula 23 can be obtained.

∫I _u ds∫dθdφ＝∫I _V ds∫dθdφ (Formula 22)

I _u S _u =I _v S _v (Formula 23)

You can get formula 2 and formula 5:

Then the relationship between the radiation flux of the light source object to the human eye can be obtained through Formula 5, as shown in Formula 24 and Formula 25.

Divide Equation 24 by Equation 25 to get Equation 1.

It can be seen from Formula 1 that when the plane lighting system provided by the present invention is working and the object distance remains unchanged, if it is necessary to reduce the image luminous flux to reduce the glare of the light, it is only necessary to reduce the focal length of the plane lighting system. When the focal length remains unchanged, if the image light flux needs to be reduced to reduce the glare of the light, it only needs to be increased by increasing the image distance.

A planar lighting system of the present application has been described above, and the optical magnifying device will be described below.

In one embodiment of the present invention, the optical amplification device is located on the light path of the scattering light source object. A backlight is provided on the back of the scattering light source object, and after passing through the optical amplification device, the backlight A backlight image is formed in the space behind the object.

It should be noted that when the optical amplification device provided in the above embodiment performs optical amplification, only the division of the above program modules is used as an example. In practical applications, the above processing can be allocated to different program modules as needed. That is, the internal structure of the device is divided into different program modules to complete all or part of the processing described above. In addition, the optical amplification device provided in the above embodiments and the planar lighting system embodiment belong to the same concept, and the specific implementation process can be found in the method embodiments, which will not be described again here.

To sum up, this application provides an optical amplification device and a planar lighting system to which it is applied. By arranging a scattering light source object and an optical amplification device, the degree of glare is reduced and the light range is consistent with the range of natural light to provide sufficient illumination, while allowing people to enjoy a soft visual experience, as if they are in a natural light environment. By providing a relatively spacious feeling, the overall comfort of use is improved. Whether it is a home, office or public place, users can feel the warmth and comfort of natural light. In addition, unlike the traditional top installation method, this application can be installed and placed at any desired location to adapt to the needs of different places, thereby bringing a more personalized lighting experience. Therefore, the present application effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

The above embodiments only illustrate the principles and effects of the present application, but are not used to limit the present application. Anyone familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in this application shall still be covered by the claims of this application.

Claims (10)

1. A planar lighting system, comprising: a scattering light source object, an optical amplifying device; the optical amplifying device is positioned on the light-emitting path of the scattering light source object, the back surface of the scattering light source object is provided with a backlight object, and a backlight image is formed in the back space of the backlight object.

2. The planar illumination system of claim 1 wherein the diffuse light source includes a surface layer facing the optical magnification device, the surface layer having a scene layer thereon for presenting a scene on the scene layer in the backlight.

3. A planar illumination system as claimed in claim 1 or 2, characterized in that the radiant flux of the backlight image is in a reverse varying relationship with the distance of the backlight image to the optical amplifying means and in a forward varying relationship with the focal length of the optical amplifying means.

4. A planar illumination system as claimed in claim 3, characterized in that the radiant flux of the backlight image and the distance of the backlight image to the optical amplifying means fulfil the following condition:

wherein phi is _v For the radiant flux of the backlight image, phi _u The radiation flux of the scattering type light source object is u, the distance from the scattering type light source object to the optical amplifying device is u, and f is the focal length of the optical amplifying device.

5. A planar illumination system as claimed in claim 1 or 2, characterized in that the light intensity of the backlight image is inversely related to the area of the scattering-type light source object and positively related to the radiant flux of the backlight image.

6. The planar illumination system of claim 5, wherein the light intensity of the backlight and the area of the diffuse light source object satisfy the following conditions:

wherein S is _u S is the area of the scattering light source object _v I is the area of the backlight image _u For the light intensity of the scattering light source object, I _v R is the light intensity of the backlight image _u R is the radius of the scattering light source object _v And u is the distance from the scattering light source object to the optical amplifying device, v is the distance from the backlight image to the optical amplifying device, and f is the focal length of the optical amplifying device.

7. The planar illumination system of claim 5, wherein the light intensity of the backlight image and the radiant flux of the backlight image satisfy the following conditions:

wherein I is _0-u For the light intensity of the scattering light source object in the vertical direction, I _0-v For the intensity of the backlight image in the vertical direction.

8. The planar lighting system according to any one of claims 1 to 7, wherein the optical amplifying device comprises: a single convex lens, a lens array, a Shan Feinie-mole lens, a multi-layer lens array.

9. The planar lighting system according to any one of claims 1 to 7, wherein the diffuse light source object comprises: a diffuse LED light source, a diffuse OLED light source.

10. An optical amplifying device is characterized in that the optical amplifying device is positioned on a light-emitting path of a scattering light source object, a backlight object is arranged on the back surface of the scattering light source object, and a backlight image is formed in a back space of the backlight object after the optical amplifying device passes through the optical amplifying device.