KR101472897B1 - Medical appratus having the flexible light - Google Patents

Abstract

The present invention relates to a medical device using a flexible light source. The medical device can irradiate various positions of a body with light in a certain wavelength to perform a relevant medical treatment. The medical device includes a light panel and a controller. The light panel includes: a flexible substrate; a light element mounted on the flexible substrate; and a diffusion sheet that comprises one or more polymer layers in which inorganic particles are dispersed and mixed, and is arranged on the substrate to cover the light element. The controller includes a volume module for controlling the the intensity of current applied to the light element.

Description

{Medical appratus having the flexible light}

The present invention relates to a medical device using a flexible light source in which light of a specific wavelength is effectively inspected at various positions of the body to take appropriate medical measures.

Light of a specific wavelength is widely used for various medical purposes. For example, infrared rays are used in the treatment of rheumatism, muscular pain, neuralgia, arthritis, back pain, abrasions, flu, dental diseases, etc., and light of a specific wavelength of visible light is used for treating diseases such as neonatal jaundice, .

Especially, since infrared rays and visible rays of a specific wavelength can be directly irradiated to the body when they are within a predetermined time, they are utilized in various forms in hospitals.

However, the conventional medical apparatus which irradiates light of a specific wavelength to the body has structural limitations in that it only irradiates the front surface of the patient's body but does not examine the side surface or the curved surface. That is, in the conventional medical device, only one surface of the facing body is intensively irradiated and cured, but the side of the body connected to the one surface has a relatively limited amount of light irradiation so that the treatment can not be performed smoothly .

In addition, the patient's irradiation range varies depending on the physique and the treatment area. In the conventional medical device, only the intensity of the light can be adjusted, but there is a limitation in that only one surface can be irradiated with the light irradiation site.

As a result, when a patient is required to treat a specific region using a light irradiation type medical device, the practitioner has to incur the inconvenience that each part of the patient's body needs to be rotated while using the medical device. Of course, in this case, in order to irradiate all of the treatment regions, the treatment regions may be irradiated all at once to a plurality of medical apparatuses. However, when there is not a sufficient number of medical apparatuses, There was an irrationality to do.

Prior Art Document 1. Published Patent Publication No. 10-2012-0049085 (published May 16, 2012)
Prior Art Document 2. Japanese Published Patent Application No. 2007-518467 (published on July 12, 2007)

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a medical device using a flexible light source that can effectively perform optical therapy by effectively irradiating light according to a body part and a physique of a patient, We will do it.

According to an aspect of the present invention,

An optical panel having a flexible substrate, an optical element mounted on the flexible substrate, and a diffusion sheet composed of one or more silicon polymer layers dispersedly mixed with inorganic particles and disposed on the substrate to cover the optical element; And

A controller having a volume module for controlling intensity of a current applied to the optical element;

And a flexible light source.

In the present invention, light emitted from a photonic device mounted on a substrate is emitted through a flexible substrate, and light can be irradiated to a part of the body through the flexible substrate at a certain time. In addition, There is an effect that the emitted light is uniformly irradiated to the body in the form of plane light.

Figure 1 schematically illustrates an embodiment of a medical device according to the present invention,
2 is a schematic view of an optical panel of a medical device according to the present invention,
3 is a block diagram illustrating a configuration of an embodiment of a medical device according to the present invention,
4 is a schematic view of another embodiment of a medical device according to the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, It will be possible. The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It should be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a view schematically showing an embodiment of a medical device according to the present invention, and FIG. 2 is a view schematically showing an optical panel of a medical device according to the present invention.

The medical apparatus according to the present invention comprises an optical panel 100 for emitting treatment light and a controller 200 for controlling the emitted light of the optical panel 100. [

The optical panel 100 includes a flexible substrate 110, an optical element 120 mounted on the flexible substrate 110, a base layer 130 stacked on the substrate 110 to cover and protect the optical element 120, And a diffusion sheet 140 laminated to the base layer 130 to induce diffusion of light emitted from the optical element 120.

The flexible substrate 110 is a substrate on which the optical element 120 can be uniformly arranged. A printed circuit board (PCB) is applied to the optical element 120 for electrical mounting. Meanwhile, in the flexible substrate 110 according to the present invention, a flexible material is applied so that the point light source substrate by the optical device 120 can be bent. For reference, the flexible substrate 110 is formed by forming a wiring pattern on a flexible insulating substrate made of a polymer such as polyimide, and various elements are mounted according to the type of the flexible substrate for a light source. In general, a flexible printed circuit board (FPCB) or a flexible copper clad laminate (FCCL) is exemplified.

The structure of the flexible substrate 110 will be described in detail with reference to an embodiment.

The copper foil pattern is bonded to the base polymer film, which is a flexible insulating substrate made of a polymer, with a copper foil adhesive layer. Examples of the adhesive used for the adhesive layer for copper foil include epoxy resin and phenol resin. The copper foil pattern is covered with an insulating protective film made of a polymer, and the insulating protective film is bonded to the copper foil pattern by an adhesive layer for an insulating protective film. However, one end of the copper foil pattern is exposed without being coated with the insulating protective film, and the exposed portion functions as a terminal portion for connecting to an external electronic component. Subsequently, the insulating protective film insulates the copper foil pattern from the outside, protects the copper foil pattern from corrosion such as rust, and enhances the folding endurance of the flexible substrate 110. As the material of the insulating protective film, polyimide is widely used. In order to stabilize the connection with an external electronic component by preventing the generation of rust of the copper foil pattern on the surface of the exposed portion (terminal portion) of the copper foil pattern, Au / Ni plating (Au layer after forming Ni layer in the lower layer ) Or Sn plating or the like is formed by plating.

The flexible substrate 110 has flexibility other than the above-described structure, and various techniques for improving the flexural resistance can be applied.

The optical element 120 is electrically mounted on the flexible substrate 110, and a lamp that emits a unique light is exemplified. More specifically, the optical element 120 is an IR lamp that emits infrared rays for use in the treatment of rheumatism, muscular pain, neuralgia, arthritis, back pain, abrasion, flu and dental diseases, diseases such as neonatal jaundice Blue LED lamps emitting visible light of a specific wavelength band (475 to 574 nm) for use in therapy, and UV lamps emitting ultraviolet rays for disinfection. For reference, a dedicated LED can be applied as a light source such as an IR lamp and a UV lamp.

The optical element 120 is preferably arranged in an aligned manner so that the flexible substrate 110 can exhibit stable warpage, and it is preferable that the optical element 120 is arranged at regular intervals so that uniform light emission can be achieved on all surfaces. In addition, the above-described arrangement of the optical element 120 may allow the light emitted through the diffusion sheet 140 to be uniform so that the light-screening effect of light emitted through the light panel 100 is manifested.

The base layer 130 is stacked to embed the optical element 120, thereby preventing light leakage of the optical element 120 and facilitating stacking of the upper diffusion sheet 140. The base layer 130 is preferably a silicon polymer. The silicon polymer as the base layer 130 has excellent heat resistance to the heat generation of the optical device 120 and the upper diffusion sheet 140 is made of a silicon polymer so that light utilization efficiency can be improved, It is possible to prevent the phenomenon of the above-mentioned problems.

The base layer 130 covers the upper portion of the optical element 120 to a thickness of less than 0.5 mm so that the optical element 120 can be positioned on the flexible substrate 110 Is preferable in light utilization efficiency. Meanwhile, the base layer 130 according to the present invention may also include inorganic particles to further improve uniformity and heat resistance.

For reference, the optical panel 100 according to the present invention can integrate the base layer 130 and the diffusion sheet 140. Such an integration process can be achieved by using roll-to-roll equipment, which is advantageous in mass production, simple in process, and excellent in productivity.

The diffusion sheet 140 is composed of silicon polymer layers 141 and 142 including inorganic particles 141a and 142a having n1 or n2 refractive indexes.

Roneun the n1 or inorganic particles (141a, 142a) having a refractive index n2 and the like can be used _{ZrO 2, SiO 2, Al 2} O 3, TiO 2, Y 2 O3, SnO 2, CeO 2. TiO ₂ is preferable as the inorganic particles 141 a having the refractive index n ₁ , and Al ₂ O ₃ is bonded to the inorganic particles 142 a having the refractive index n ₂ . More preferably a rutile structure of TiO ₂ , and alpha (a) -Al ₂ O ₃ . TiO ₂ and Al ₂ O ₃ are dispersed in the silicon polymer layers 141 and 142 among the inorganic particles 141 a and 142 a to improve the heat resistance and maximize the uniformity .

The refractive index of n1 is larger than the refractive index of n2, and the refractive index difference is preferably 0.5 to 3.0. Diffusion occurs due to the refractive index difference, and diffusivity becomes larger as the refractive index difference is larger. Such a difference in refractive index of 0.5 or more results in a light uniformity to such an extent as to prevent the light emitted from the optical element 120 from being reflected or glazed.

Al ₂ O ₃ as a representative inorganic particles (142a) having a refractive index of said n2 is from 1.75 to 1.78, having a refractive index range of the refractive index range of TiO ₂ is 2.6 to 2.8 as a typical inorganic particles (141a) having a refractive index of the n1 I have.

On the other hand, as described above, the diffusion sheet 140 is preferably a silicon polymer. The diffusion sheet 140 may be designed to have a constant curvature according to the usage pattern. In order to achieve such a purpose, a silicone polymer having a flexible property is suitable. For reference, the silicon polymer constituting the silicon polymer layers 141 and 142 has excellent heat resistance to heat, and thus is suitable for direct-type illumination.

Optical sheets such as a light guide plate and a prism sheet of a conventional LED lighting device were made of materials such as polymethyl methacrylate (PMMA) and polycarbonate (PC), which were vulnerable to heat, and therefore, they had to be installed at a certain distance from the LED light source. However, the silicon polymer layers 141 and 142 used in the present invention can be used integrally with an LED light source or the like, which is excellent in heat resistance and can be utilized as the optical device 120. Such excellent heat resistance can be achieved also by the characteristics of the silicon polymer layers 141 and 142 themselves, but it has been experimentally confirmed that the inorganic particles 141a and 142a have better heat resistance by dispersing them.

In addition, the inorganic particles 141a and 142a not only enhance the heat resistance but also increase the refractive index of the entire silicon polymer layers 141 and 142. [ When the refractive index increases, the light utilization efficiency increases.

The size of the inorganic particles 141a and 142a having the n1 or n2 refractive index is preferably 5 to 75 nm. There is a slight difference depending on the kinds of the inorganic particles 141a and 142a, and in particular, in the case of TiO ₂ and Al ₂ O ₃ , a size of 5 to 75 nm is preferable. When the thickness is less than 5 nm, aggregation occurs between the particles, and when the particle diameter is more than 75 nm, the heat resistance and the uniformity effect are inferior. However, there is some difference in the content. In other words, the high refractive index inorganic particles (141a), such as TiO ₂ having a refractive index of n1 is one preferred 0.05wt% to 0.2wt%, 5.0wt% is a low refractive index inorganic particles (142a), such as Al ₂ O ₃ having a refractive index n2 By weight to 15.0% by weight. In order to more uniformly disperse the inorganic particles 141a and 142a such as TiO ₂ or Al ₂ O ₃ in the silicone polymer layers 141 and 142, a surface modifier or a dispersant may be additionally used.

The preferable ranges of the content of the inorganic particles 141a having the n1 refractive index and the inorganic particles 142a having the n2 refractive index were calculated to satisfy the range of heat resistance, light utilization efficiency and uniformity. The contents of the inorganic particles 141a and 142a with respect to light utilization efficiency and uniformity are shown in the following examples. As a result of the test for 24 hours in an oven at 250 ° C., the heat resistance was determined to be within a suitable range of the content of the inorganic particles (141a, 142a) without any change in color, peeling, or cracking of the visual material. As a result of the punch test, all of the diffusion sheets 140 in the content range of the inorganic particles 141a and 142a did not peel off.

The individual thickness of the silicon polymer layers 141 and 142 including the inorganic particles 141a and 142a is preferably 0.2 to 1.0 mm. The thickness of the entire layer including the individual layers is preferably 2.0 mm to 10.0 mm. When the individual thickness is 0.2 mm or less, the inorganic particles 141 a and 142 a are difficult to be dispersed, heat resistance is poor and peeling phenomenon easily occurs, and when the thickness is 1.0 mm or more, there is a problem that light utilization efficiency drops.

The silicon polymer layers 141 and 142 including the inorganic particles 141a and 142a use silicon polymers having the same constitution. Since the same material has the same composition, there is little interface reflection between the materials, and the light utilization efficiency is improved, and peeling does not occur in the punching. Further, it is not necessary to use a separate adhesive component to integrate the layers.

The diffusion sheet 140 made of a silicon polymer material containing the inorganic particles 141a and 142a is suitable for wedge-shaped illumination or direct-illumination type illumination. However, since the silicon polymer layers 141 and 142 including the present inorganic particles 141a and 142a are excellent in heat resistance to the heat generation of the optical element 20 and have excellent light use efficiency while maximizing the uniformity, . In addition, it has an advantage of uniform light diffusion effect even when there is no separate light guide plate when applied to direct lighting.

Experimental contents of diffusion efficiency of the diffusion sheet 140 formed in the optical panel 100 according to the present invention will be described below.

<Experimental Example 1>

Titration of TiO ₂ and Al ₂ O ₃

The test sample is prepared by applying and firing a silicon polymer (base layer) so that the optical element 120 is thinly covered, applying and firing a silicon polymer (diffusion sheet) having a content of inorganic particles dispersed therein to be tested, A surface light source of 4 cm x 4 cm size was fabricated. The uniformity and light efficiency tests were conducted using the model name 'RISA COLOR / ONE-S'.

Table 1 below shows the uniformity and the light utilization efficiency according to the content of TiO ₂ . The particle size of the TiO ₂ was 50 nm, and the silicon polymer layers 141 and 142 forming the diffusion sheet 140 were tested as a single layer.

TiO ₂ content 0.5 wt% 0.2 wt% 0.1 wt% 0.05 wt% 0.01 wt% Uniformity 12.6 24.7 29.5 23.2 9.8 Light utilization efficiency 73.80 74.90 77.84 76.45 75.48

As shown in Table 1, when the content of TiO ₂ is 0.1 wt%, the uniformity and the light utilization efficiency are the highest, and when the content of TiO ₂ is 0.5 wt% and 0.01 wt% As shown in FIG. Therefore, when the content of TiO ₂ is 0.05 wt% to 0.2 wt%, the light diffusivity (uniformity) that minimizes the non-contact phenomenon or the glare phenomenon of the light source is shown and the excellent light use efficiency is shown.

Table 2 below shows the uniformity and the light utilization efficiency according to the content of Al ₂ O ₃ . The particle size of Al ₂ O ₃ was 70 nm, and the silicon polymer layers 141 and 142 forming the diffusion sheet 140 were tested as a single layer.

Al ₂ O ₃ content 20wt% 15wt% 10wt% 5 wt% 1wt% Uniformity 10.2 23.3 28.7 22.4 6.3 Light utilization efficiency 72.8 73.9 75.4 75.0 74.2

As shown in Table 2, when the content of Al ₂ O ₃ is 10 wt%, the uniformity and the light utilization efficiency are the highest, and when the content of Al ₂ O ₃ is 20 wt% and 1 wt% As shown in FIG. Therefore, when the content of Al ₂ O ₃ is in the range of 5 wt% to 15 wt%, the light diffusivity (uniformity) that minimizes the non-penetration phenomenon or the glare phenomenon of the light source is exhibited and the excellent light utilization efficiency is shown.

<Experimental Example 2>

Uniformity and light utilization efficiency test

Uniformity and light use efficiency test for grasping the degree of light diffusivity were carried out. The silicon polymer layers 141 and 142 constituting the diffusion sheet 140 were separated into a single layer and a multilayer (see FIG. 1). This test was conducted by coating and firing a silicon polymer base layer 130 containing 0.1 wt% of TiO ₂ on the optical element 120 and coating and firing the diffusion sheet 140 on the optical element 120, , The TiO ₂ content was 0.1 wt%, the Al ₂ O ₃ content was 10 wt%, and the SiO ₂ content was 10 wt%. The thickness of the single layer was 0.5 mm, and the test was carried out. The results are shown in Table 3 below.

Material 단일층 diffuser non SiO ₂ TiO ₂ Al ₂ O ₃ TiO ₂ + Al ₂ O ₃ Uniformity 1.7 21.6 32.5 34.4 22.7 Light utilization efficiency 85.4 82.2 84.7 83.3 79.7 Material 다층 diffuser TiO ₂ / Al ₂ O ₃ Al ₂ O ₃ / TiO ₂ (TiO ₂ + Al ₂ O ₃ ) x 2 (TiO ₂ / Al ₂ O ₃ ) x 2 _{(Al 2 O 3 / TiO 2} ) x2 Uniformity 51.9 54.3 43.1 88.5 88.1 Light utilization efficiency 81.2 79.9 73.7 77.3 74.2

TiO ₂ + Al ₂ O ₃ : A single layer diffusion sheet in which TiO ₂ and Al ₂ O ₃ are mixed.

TiO ₂ / Al ₂ O _3: TiO ₂ layer is close to the LED light source than Al ₂ O ₃ layer, consisting of two diffusion layers of TiO ₂ and Al ₂ O ₃ sheet

Al ₂ O ₃ / TiO ₂ : Al ₂ O ₃ layer is TiO ₂ A diffusion sheet made of two layers of Al ₂ O ₃ and TiO ₂ ,

(TiO ₂ + Al ₂ O ₃ ) x ₂ : A diffusion sheet in which two layers of a mixture of TiO ₂ and Al ₂ O ₃ are laminated.

(TiO ₂ / Al ₂ O ₃ ) x ₂ : A diffusion sheet in which the TiO ₂ layer is closer to the LED light source than the Al ₂ O ₃ layer and the layers of TiO ₂ and Al ₂ O ₃ are alternately laminated.

(Al ₂ O ₃ / TiO ₂ ) x ₂ : Al ₂ O ₃ layer is closer to the LED light source than the TiO ₂ layer, and Al ₂ O ₃ and TiO ₂ layers are alternately laminated.

From Table 3 above, five effects on the diffusion sheet of the present invention can be derived.

First, it can be seen that the diffusion sheet of the single layer of TiO ₂ and Al ₂ O ₃ of Table 3 is superior in uniformity and light utilization efficiency as compared with [Table 1] and [Table 2]. Table 1 and Table 2 and Table 3 in the test differences If the base layer 130, since the difference in whether or not contain TiO ₂ in a base layer 130 including the TiO ₂ Uniformity And the light utilization efficiency is more excellent.

Second, it can be seen that the uniformity of the multiple-layer diffusion sheet is superior to that of the single-layer diffusion sheet under the same conditions, and the uniformity of the four-layer diffusion sheet is superior to that of the two-layer diffusion sheet.

Third, it can be seen that the diffusion sheet containing TiO ₂ and Al ₂ O ₃ has better uniformity and light utilization efficiency than the diffusion sheet containing SiO ₂ .

Fourth, it can be seen that the diffusion sheet containing TiO ₂ and Al ₂ O ₃ as a single material is more uniform than the diffusion sheet containing TiO ₂ and Al ₂ O ₃ and the light utilization efficiency is better.

Fifth, TiO ₂ are alternately stacked in close proximity to the optical element _{(120) (TiO 2 / Al} 2 O 3) x2 diffusion sheet, Al ₂ O ₃ is deposited in close proximity to the optical element (120) (Al ₂ O ₃ / TiO ₂ ) x ₂ diffusing sheet in terms of uniformity and light utilization efficiency.

As a result, the four-layer (TiO ₂ / Al ₂ O ₃ ) x2 diffusion sheet 140 shows an optimal uniformity, and the effect of the light source state, that is, And the glare phenomenon (glaring) can be minimized. In addition, it shows an excellent effect of 75% or more in terms of light utilization efficiency, and thus it is suitable for use as a diffusion sheet dedicated to a light source using the optical element 120.

As described above, the optical panel 100 according to the present invention is fabricated as the flexible substrate 10 and can be deformed so as to surround the periphery of the body L as shown in Fig. 1 (b) The light of the optical element 20 can be emitted to perform the treatment. In other words, even with the medical device according to the present invention, it is possible to illuminate various parts of the body L at a time and to perform detailed treatment.

FIG. 3 is a block diagram illustrating a configuration of an embodiment of a medical device according to the present invention. Referring to FIG.

Subsequently, the medical device according to the present invention further comprises a controller 200 for controlling the optical panel 100. The controller 200 controls the light emission of the optical element 120 by generating a control signal according to a user's operation. The controller 200 includes a volume module 210 for adjusting the intensity of a current supplied to the optical element 120, And a timer 230 for controlling the time for the optical device 120 to operate for a predetermined period of time based on the intensity of the adjusted current.

The volume module 210 controls the current applied to the optical element 120 while performing a function of a variable resistor. In the present embodiment, the analog type rotary button 211 is illustrated. However, it is also possible to apply a digital adjustment method in which the intensity is adjusted in a certain unit by a button click.

The display unit 220 converts the intensity information into a numerical value or the like so as to confirm the light emission intensity of the optical element 120 adjusted by the user and outputs the intensity information. Generally, the 7-segment type output system may be applied , A simple analog method of the guideline type may be applied. The monitors 221 and 222 of the display unit 220 may be configured in the operation buttons 211 of the volume module 210 and the operation buttons 231 of the timer 230 in the embodiment of the present invention, Emission intensity and driving time.

The timer 230 controls the light emission time of the optical element 120. When the light emission time is set through operation of the button 231, electricity is supplied to the optical element 120 during the time, The electricity supplied to the optical element 120 is cut off. The timer 230 may be a simple handwritten analog system or a digital system. When the user operates the operation button 231 of the timer 230, the remaining time is displayed on the monitor 222 of the display device 220. The remaining time is counted as the time elapses, Can be predicted.

In the embodiment of the present invention, the controller 200 is integrated into the optical panel 100. However, the controller 200 may be configured to separate the optical panel 100 from the optical panel 100, The driving of the optical element 120 can be controlled.

The controller 200 further includes a power switch 201 for turning on / off the power of the controller 200. In addition, the controller 200 may further include a battery (not shown) power supply for supplying electricity to the optical panel 100 so that the medical device according to the present invention can be carried. For reference, the battery power source device performs a normal function of supplying output electric power of a mounted battery to the optical device 120, and can be manufactured to have a structure in which the battery can be detachably attached for charging the battery or replacing the battery .

FIG. 4 is a view schematically showing another embodiment of the medical device according to the present invention, and will be described with reference to FIG.

The medical device according to the present invention may allow the optical panel 100 to wrap around the body L and maintain the condition, thereby allowing the patient to wear the medical device. For this, the optical panel 100 and the controller 200 are integrally formed, and one end and the other end of the optical panel 100 are formed with first and second fastening means 310 and 320 for binding each other.

Here, as the first and second fastening means 310 and 320, a velcro tape or a buckle for a belt may be exemplified.

4 (b), the medical device according to the present invention can be formed into a circular shape such as a circular or elliptical shape which can be worn by the patient as shown in FIG. 4 (b) due to the flexible substrate 110, 320 so that the round shape can be maintained. 4B shows a state in which the optical panel 100 is bent so as to have a round shape and then one end and the other end of the optical panel 100 are connected through the first and second fastening means 310 and 320 And shows a fixed side view.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100; Optical panel 110; A flexible substrate 120; Optical device
130; A base layer 140; Diffusion sheet 200; Controller
210; A volume module 220; A display unit 230; timer
310; First fastening means 320; The second fastening means

Claims (9)

An optical panel having a flexible substrate, an optical element mounted on the flexible substrate, and a diffusion sheet composed of one or more silicon polymer layers dispersedly mixed with inorganic particles and disposed on the substrate to cover the optical element; And a controller having a volume module for controlling the intensity of a current applied to the optical element, the medical device using the flexible light source,
Wherein the diffusing sheet comprises a first silicon polymer layer in which inorganic particles having a refractive index of n1 are mixed and dispersed and a second silicon polymer layer in which inorganic particles having a refractive index of n2 are mixed and dispersed and the refractive index of n1 is a refractive index Larger;
Wherein the flexible light source comprises a flexible light source. The method according to claim 1,
A first fastening means and a second fastening means are fastened to one end and the other end of the optical panel so that a round shape formed by connecting one end and the other end of the optical panel is maintained;
Wherein the flexible light source comprises a flexible light source. 3. The method of claim 2,
The optical panel and the controller being integrally formed;
Wherein the flexible light source comprises a flexible light source. The method according to claim 1,
A base layer of a silicon polymer material laminated between the substrate and the diffusion sheet to embed the optical element;
Further comprising a second light source for generating a second light beam. delete The method according to claim 1,
The first silicon polymer layer being closer to the optical element than a second silicon polymer layer;
Wherein the flexible light source comprises a flexible light source. The method according to claim 1,
Inorganic particles having a refractive index n1 of the will of TiO _2, and wherein the content of the inclusion first silicon polymer layer 0.05wt% to 0.2wt%;
Wherein the flexible light source comprises a flexible light source. The method according to claim 1,
Inorganic particles having a refractive index n2 of the above is that the Al ₂ O _3, and wherein the second silicon content contained within the polymer layer 5.0wt% to 15.0wt%;
Wherein the flexible light source comprises a flexible light source. The method according to claim 1,
Wherein the diffusion sheet is formed by alternately stacking the first silicon polymer layer and the second silicon polymer layer to form four layers;
Inorganic particles having a refractive index of n1 are the TiO _2, the first is 0.05wt% to 0.2wt% in contained amount of silicon polymer layer, and;
Inorganic particles having a refractive index n2 of the above is that the Al ₂ O _3, and wherein the second silicon content contained within the polymer layer 5.0wt% to 15.0wt%;
Wherein the flexible light source comprises a flexible light source.

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