JP2010244955A - Diode refraction ceiling lighting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a diode refraction ceiling lighting device that has brightness of a ceiling lighting device even to effectively utilize the brightness by regulating the projection area and inducing the luminous flux. <P>SOLUTION: Mainly a fiber light guide plate, a frame, and light entering faces, which make a luminous flux generated by a luminescence unit enter two sides opposing the light guide plate, are formed; a refraction surface is provided all over the light guide plate and a reflection surface is provided all over other surface; a plurality of projected granular reflection members distributed on the reflection surface in matrix to reflect in the direction of the refraction surface are provided; the grain diameter gradually becomes smaller towards the light entering face direction in geometric progression on the basis of the surface center of the reflection surface; the mutual distance is gradually increased adversely; the route of the luminous flux injected by curved reflection surfaces of the reflection members becomes close to the vertical line of the refraction surface; the luminous flux is evenly projected to effectively regulate the lighting angle; the frame covering the periphery practices heat dissipation and forms a connection so that the frame can be easily mounted on the ceiling; and local projection lighting is formed to a floor surface; in the device. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a diode-refractive ceiling lighting device, and more particularly to a plate-like ceiling lighting device that can project light in a limited area onto the ground at a projection angle that is limited by being used on an indoor ceiling, and is mainly uniform. The present invention relates to a diode refracting ceiling lighting device that can form a radiant luminous flux and an effective limited projection area, can be smoothly coupled to the ceiling, and radiates itself.

  Under the trend of energy saving and CO2 reduction, power-saving lighting equipment has become the mainstream of home and office lighting. Both fluorescent lamps and LED lamps are power-saving, but current LED lamps are dot-like and matrix-like. It is a point light source that is distributed in a spot shape when observed from the outside, and due to errors in production process or material quality, the luminous efficiency and wavelength of each LED lamp become uneven, and its color rendering property is not excellent There are things to do. The brightness emitted by conventional fluorescent lamps is uniform, and with the recent new three-wavelength technology, its color rendering and illuminance are uniform and soft. For this reason, in implementation using LED as a light emitting member, it cannot be applied to the function of room lighting unless the light beam is converted by optical mechanism.

  In general, the number of lighting devices to be employed is determined based on the size of the floor area in a room. For example, an office cannot be used for reading unless there is a 100W lighting facility in about 6-8 square meters, and the angle of the lighting is basically less than 180 in principle. However, a specific illumination angle is standardized with respect to the illumination area, and the illumination can sufficiently use light energy according to the standard of the angle, and a wasteful burden of light energy can be avoided. Norms are difficult.

  The LED lighting industry has been recognized as one of the potential industries in recent years.It is mainly small in volume, lightweight and thin, and if it can be used for lighting applications, it can provide a usage mode with a greater degree of freedom in the living space, Energy saving effect can also be expected. LED has not only a small volume and fast reaction time, but also has the advantage that it is not harmful to mercury like conventional fluorescent lamps, but the LED used as lighting in living space needs to have high work rate, In contrast, waste heat is generated. In addition, the luminaire must not have an operating temperature that is too high, and the total temperature difference must not be higher than 15 degrees to avoid the loss of efficiency due to heat degradation of the material and the vicious cycle of electrical resistance. I must. If the loss of efficiency exceeds 10%, the projected luminance is significantly reduced, and the total luminous flux of the projected area is greatly reduced.

  Currently, there is a proposal of US Pat. No. 6,540,373 B2 as a design of LED lighting. In this arrangement, a plurality of LED diode light emitting units are arranged in a matrix on the plate body, and the plate body is used as one of the pieces constituting the ceiling to obtain the amount of light emitted downward. Since the unit is a point light source, the appearance may be irritating to the eyes, and the brightness or color temperature may be non-uniform due to production errors.

  In addition, US Pat. No. 6,355,961 is designed to dissipate the light spot by installing a light rectifier on the LED projection surface arranged in a matrix, and US Pat. No. 7,311,423 B2 uses LED to position the conventional fluorescent lamp. There is a similar point light source problem as well.

  There is another US 2001/0046131 / A1 proposal for light source beam adjustment technology. This method uses a mixing chamber to first reflect the light source beam action part, and then carry out preliminary diffusion using a diffusion assembly. It is used as a backlight for the LED plate by entering the light plate and changing the direction of the light beam on its reflecting surface. This is not only a different use scene, but also a preparatory mixing and preparatory diffusion method, and the amount of light flux is already lost before entering the light guide plate. The brightness is very uniform. However, in the case of energy saving with indoor lighting, the loss of preparatory light beam adjustment work is disadvantageous for general implementation.

US Pat. No. 6,540,373 B2 US Pat. No. 6,355,961 US Pat. No. 7,311,423 B2 US Patent US 2001/004613 / A1

  The present invention utilizes the principle of reflection and refraction, uses a reflection design corresponding to the difference between the angle guidance and the optical path, reaches the effect of uniforming the brightness of the ceiling lighting device, norms the projection area, Provided is a diode-refractive ceiling lighting device that can guide and effectively use a luminous flux.

  The main object of the present invention is to use a fiber light guide plate in consideration of effective directional utilization of light flux, uniform radiation of the entire refractive surface, and effective elimination of waste heat of the light emitting unit, and at least two parallel. It is possible to arrange a light emitting unit in which the light incident surfaces are arranged side by side, and the light energy generated by the light emitting unit enters from the light incident surfaces that are two parallel surfaces, and is reflected by the light guide plate to advance. The light beam entering from the light surface is divided into multi-angle directions. Basically, the size of the light guide plate is selected based on the emission angle of the light emitting unit, and the radiation angle is generally between 20 and 60 degrees. Many kinds of standard LED light-emitting members can be used, and after the emitted light beam enters from the light incident surface of the light guide plate, one part acts on the refracting surface and another part on the reflecting surface After the light beam reaches the reflecting surface, it is based on the normal of the reflecting surface. The reflected light beam travels in the direction of the refracting surface, a reflecting member is installed on the reflecting surface, a reflecting curved surface is provided on the reflecting member, and the curved surface is effective against the light beam entering from the light incident surface. The direction of the radiation route from which the reflected light beam is emitted can be made closer to the vertical line of the refracting surface, so that the light beam generated by the light emitting unit is close to 90 degrees, and the ceiling lighting device Effectively increases the directivity of the illumination angle, norms it to a limited angle, and does not waste the amount of light, and the light-emitting unit uses the frame directly as a heat conduction mechanism externally, and the generated waste heat is effective. In the matrix arrangement system of each reflecting member on the reflecting surface, it is convenient to form a coupling part using a frame and attach it to the ceiling for lighting on the floor surface. , That Since the interval increases with a geometric series as it goes outward with respect to the center, and the particle size of the reflective member becomes smaller as it goes outward with respect to the center, the uniform brightness and illumination angle can be specified. An object of the present invention is to provide a diode-refractive ceiling lighting device.

  Still another object of the present invention is to provide a diode refraction type ceiling lighting device in which the frame has a screw fixing action, the light emitting units are arranged and arranged, and the light guide plate can be fixed by an assembly method. .

  The third object of the present invention is to install a reflecting plate that reflects inward on the outer surface of the reflecting surface of the light guide plate, and to install an optical diffusing plate toward the outside on the refracting surface. It is possible to provide a diode-refractive ceiling illumination device.

  The present invention uses a plate-shaped light guide plate, and the light guide plate has at least two parallel light incident surfaces facing each other, and the light beams generated by the arranged light emitting units face each other. The light guide plate is formed with a refracting surface for sending a light flux, a reflective surface is provided on the other surface, a plurality of reflective members are arranged in a matrix arrangement on the reflective surface, and the reflective member The particle diameter is gradually reduced by a geometric series as it goes in the direction of the light incident surface with reference to the center of the surface, and the gap between each reflecting member is gradually increased by a geometric series. And the particle size of the reflecting member located near the outer edge of the surface is set to 1, and the gap between the adjacent reflecting members is set to 1 at the center of the reflecting surface, Gradually increase it so that it is located near the outer edge of the surface as the interval of 2 Since the one that reaches the center in the progress of its optical path gradually wears out, the density of the reflecting member is increased at the central location, forcibly enhancing the reflection work, It is possible to make the luminance of the light beam radiated on the entire refracting surface uniform. The reflecting member has a projecting shape, has a reflection curved surface facing inward, and changes the direction corresponding to the light beam emitted at a certain angle of the light emitting unit and reflects the light so as to be a vertical line approaching the refracting surface. It is possible to refract the luminous flux route of the light emitting member to be close to 90 degrees and to project the illumination angle of the ceiling lighting device effectively downward, and to guide the entire amount of the luminous flux to irradiate downward. Can be made.

It is an external view which shows the state which applied this invention to the indoor ceiling. It is side surface sectional drawing of this invention. It is a side view which shows the advancing principle of the light beam of this invention. It is a side view which shows the illumination angle relationship of this invention. It is a top view which shows the proportional distribution of the installation relationship of the reflection member of this invention. It is a top view which shows a response | compatibility with the light beam route | root of the reflection member of this invention. It is a luminance curve figure of the irradiation light path of this invention of 1.6 meters. It is a luminance curve figure of the irradiation optical path 2 meters of this invention. It is the brightness | luminance curve figure measured on the optical path 1.6-meter area X-axis of this invention and the conventional fluorescent lamp. It is the brightness | luminance curve figure measured on the optical path 1.6-meter area Y-axis of this invention and the conventional fluorescent lamp. It is the luminance curve figure measured on the optical path 2 meter area X-axis of this invention and the conventional fluorescent lamp. It is the luminance curve figure measured on the optical path 2 meter area Y-axis of this invention and the conventional fluorescent lamp. It is side surface sectional drawing which shows the state which implemented the heat radiator control directly to the flame | frame of this invention. It is a three-dimensional view showing the shape of a projected area formed by installing a light emitting member on two opposite sides of the present invention. It is a three-dimensional view showing the shape of a projected area formed by installing light emitting members on a plurality of opposite sides of the present invention.

  First, as shown in FIG. 1, the ceiling lighting device 10 of the present invention can be applied to an indoor ceiling. For example, in the configuration of the lightweight steel frame sash 8, the ceiling lighting device 10 has the same area as the ceiling plate 80. It can be easily combined with the lightweight steel frame sash 8 to form illumination on the floor surface.

  As shown in FIG. 2, the ceiling lighting device 10 of the present invention mainly includes a light guide plate 1, and light incident surfaces 100 corresponding to both sides of the light guide plate 1 corresponding to each other are formed in parallel. The LED light emitting units 4 are disposed opposite to the outside of the surface 100, and a plurality of the light emitting units 4 are arranged side by side, and the outside of the light emitting units 4 derives waste heat by the heat conduction unit 5 to form a waste heat dissipating route. At the same time, a refracting surface 12 and a reflecting surface 11 are formed on the upper and lower surfaces of the light guide plate 1, respectively, and after the light beam generated by the light emitting unit 4 enters from the light incident surface 100, internal reflection is performed between the refracting surface 12 and the reflecting surface 11. Then move forward.

  The reflecting plate 2 is installed on the outer surface of the reflecting surface 11, and the mechanical assembly and fixing relationship is based on the upper frame 61 and the lower frame 62 provided on the frame 6, the heat conduction unit 5, the LED light emitting unit 4, and the light guide plate. 1. The optical diffusion plate 3 and the reflection plate 2 are sandwiched and finally fixed by the coupling member 60. After the frame 6 is finally fixed by the coupling member 60, the upper frame 61, the ceiling lighting device 10, the heat conduction unit 5 and the like can be removed by removing the coupling member 60, which is convenient for maintenance of the light emitting unit 4. .

  The frame 6 is provided with a coupling portion 66 on at least one side, and can be used by being coupled externally such as hanging or erection.

As shown in FIG. 3, the action principle of the optical beam of the present invention is primarily, the light flux B ₀ to fire the LED light emission unit 4, the light flux B ₀ which is launched into the light guide plate 1 enters, after entering the reflecting surface 11 and the refracting surface 12 are reflected and advanced by the reflecting surface 11, and part of the refracting surface 12 is reflected and advanced inward. Of these, the luminous flux B ₀ is based on the manufacturing standard of the light emitting chip 41 of the light emitting unit 4. For example, in the case of an angle of 60 degrees, the emitted luminous flux enters from the light incident surface 100 at an angle of 60 degrees. The plurality of light emitting chips 41 can be arranged side by side.

After the light beam B ₀ generated by the LED light emitting unit 4 enters from the light incident surface 100, the light beam B ₁ acts on the reflective surface 11 and generates a reflected light beam B ₁₀ based on the normal line n of the reflective surface 11. some generates a refracted light beam B _1t refracted for reflection wear of the reflecting surface 11, refracted light beam B _1t is reflected by the reflective surface 20 is further provided on the reflective plate 2 inside table, in the direction of the light guide plate 1 The return light beam B _1r is reflected toward it. For this reason, the light beam B ₁ entering from the light beam B ₀ has the above-described reflected light beams B ₁₀ and B _1r , or a part of the light beam B ₂ acts on the refracting surface 12, and the refracting surface 12 is further refracted. Therefore, a part of the light beam forms forward light of the internally reflected light beam B ₂₀ , and the light beam from the light beam B ₂ through the action of the refracting surface 12 becomes the refracted light beam B _2t . B _2t is one luminous flux of the illumination.

The light beam B ₃ entering from the light incident surface 100 acts on the position of the reflective member 13, and the reflective member 13 includes a reflective curved surface 130 facing inward. The reflective curved surface 130 forms internal reflection and has a curvature. generating a reflected light beam B ₃₀ based on the normal line n. The reflected light beam B ₃₀ significantly changes the traveling angle of the light beam B ₀ from the light emitting unit 4 and brings the reflected light beam B ₃₀ close to the vertical line L ₀ of the refracting surface 12 so that the illumination projection angle θ ° ∠ (FIG. 4). Reference).

By the action of the reflected light beam B ₃₀ , the light beam is brought close to the vertical line L ₀ of the refracting surface 12 to be largely concentrated, and the angle of the light beam is totally prescribed as downward radiation, so that the light beam can be effectively used. And is not consumed horizontally.

Further, when the reflected light beam B ₃₀ is applied to the refractive surface 12, partially reflected and the reflected light beam B _3r, and the part via a different medium to form a refracted light beam B _3t, the refracted light beam B _3t is sparse Since it is a process, it deviates from the normal n, but this deviation does not significantly affect the projection angle criterion.

Both the refracted light beam B _3t and the above-mentioned refracted light beam B _2t are light beams applied to illumination, and an optical diffusion plate 3 can be further installed on the outer surface of the refractive surface 12 provided on the light guide plate 1. Can further diffuse the refracted light beams B _3t and B _2t , so that the luminance of the formed illumination light beam Bn can be made more uniform, of which the optical diffusion plate 3 is made of an optical diffusing material or a brightening material. It can be applied to membranes.

  The reflection member 13 is provided so as to protrude from the upper surface of the light guide plate 1, and the light guide plate 1 basically forms a light guide action with an optical fiber, and the reflection surface 11 and the refractive surface 12 formed there are both directed inward. The reflecting member 13 has a reflecting ability, and is coupled to the outer surface of the reflecting surface 11 of the light guide plate 1 in the same body by an ink printing method or an integral coupling method.

Among them, when the reflection member 13 is formed by an optical ink printing method, a mode of a destructive structure is formed in the coupling interface 131, the reflecting ability of the reflecting surface 11 within the range of the coupling interface 131 is lost, and the light beam B _0. before the advance light flux B ₃ acting on the reflection curved surface 130, to form a uniform radiation acting on the entire inner curved surface of the reflection curved surface 130 is first passed through the coupling interface 131 and the inner curved surface oriented but occur after entering In effect, the light beam B ₃₀ is reflected. That is, about destruction of the coupling interface 131 can determine the luminous flux intensity of a single root of the reflected light beam B _30, and forms a pre-diffusion of the reflected light beam B ₃₀ to form a uniform reflection more multi-angle, the reflected light beam B ₃₀ is emitted after passing through the refractive surface 12, respectively.

  The optical diffusing plate 3 is a diffusing device. The optical diffusing plate 3 secondarily diffuses a light beam refracted and emitted from the light guide plate 1, and has an effect of finely and uniformly distributing the light beam projected by the projection surface of the entire light guide plate 1 in appearance. Form.

  Based on the experiment of the present invention, both the luminance of the light emission and the uniform illuminance are satisfactory, and can be inferior to the expression level including the fluorescent lamp, the PL lamp, or the T5 lamp tube, or can exceed it. I understood. The single LED of the material used in the experiment of the present invention is 1 W, and the total illuminance measurement is 13,460 LUX at the center of the surface, 1,100 LUX at the center of the 1.2 meter illumination path, and the center of the 1.6 meter illumination path. It was 510LUX.

  The features of the present invention are low work-rate wear and uniform surface brightness and extremely high efficiency, and its structure is solid and the outer mold is light and thin, it is used in indoor or office, special work scenes, and even high It is also suitable for the application of luminance advertising lighting in public spaces.

  The present invention turns the luminous flux to bring out its effect to the limit. The luminous flux generated by the LED can be redirected directly and diffused uniformly, and the number of LEDs used is small and the energy is relatively small. Consumption can be reduced. In addition, remote control or brightness adjustment based on general application circuits, or adjustment functions such as changes in color wavelength or color temperature can be provided. These adjustment functions can be achieved with general modulation circuit technology. Since it is possible, description is abbreviate | omitted here. Basically, the various adjustments and original characteristics combined with the present invention can be adapted to the human visual tolerance.

  As shown in FIG. 4, the ceiling lighting device 10 of the present invention obtains electric power by applying a driving power source 7 to operate the LED light emitting unit 4, and the light flux generated by the light emitting unit 4 is reflected by the light guide plate 1 and the reflecting plate 2 or Through the conversion of the optical diffusing plate 3, the light is emitted from the refractive surface 12 to the outside and the reflection member 13 acts to normalize the illumination angle of the ceiling illumination device 10 to a certain degree angle θ ° ∠, and the luminous flux is θ It can be concentrated and projected onto the floor within an angle standard of °°. Moreover, in the implementation which set the projection distance to 1.6 or 2.0 meters, the volatility is satisfactory and is not inferior to fluorescent lamps.

  As shown in FIG. 5, the light guide plate 1 applied in the present invention is provided with a protruding reflecting member 13 (see FIG. 3) on the reflecting surface, and the reflecting member 13 is implemented by a printing method or guided. It can be integrally formed with the optical plate 1 and is basically a circular protruding spherical granular material, which is joined to one side of the reflecting surface 11. The matrix arrangement is so that a relatively high probability of reflection can be obtained at the midpoint of the surface of the light guide plate 1, and for this reason, LED light emission is performed in a manner in which the reflection member 13 itself is enlarged and closely spaced. An equal conversion effect is obtained in the optical path L route generated by the unit 4. The reflection member 13 is installed with the reflection member 13 provided in the middle of the surface of the light guide plate 1 as a reference, and the particle size is gradually reduced toward the outside in a geometric series method. Then, the particle diameter of the reflection member 13 in the middle of the surface is made twice as large as the particle diameter of the reflection member 13 on the side near the light incident surface 100.

Further, the distance between adjacent reflecting members 13 is the relative distance of the circular tangent line of each reflecting member 13, the one in the middle of the plane is set as an interval L _1, and is increased in a geometric series manner toward the outside, increasing the relative distance interval L2 of the reflecting member 13 to the neighbors near one side close to the light incident surface 100 on the face, and it is possible to set the interval L ₂ 2 times the distance L ₁ larger. As a result, the luminous flux generated by the light emitting unit 4 is increased and reflected stepwise toward the center in the process of the optical path L, and the energy that becomes weaker as the optical path approaches the center is enhanced by the concentrated arrangement of the number and quantity, and the refractive surface 12 It is possible to make the luminous flux emitted from the light uniform.

  As shown in FIG. 6, the arrangement of the reflection member 13 on the surface of the light guide plate 1 is preferably arranged in front of the route of the emitted light beam B of the LED light emitting unit 4 to which the linear position belongs.

7 and 8, a 1W LED of on the basis of the above design of the present invention is placed 48, the power requirements 110V systems, 60H _Z, relates result of performing at 75W power standards, the projection area through the test The respective luminance curves obtained under the conditions of X-axis and Y-axis, projection distance of 1.6 and 2 meters are shown.

  9 to 12 show a comparison of luminous efficiency between the present invention and a conventional fluorescent lamp. The luminance curve figure obtained by carrying out the comparative test under the situation where the projection distance is 1.6 and 2 meters, and measuring the projection area of both in the X-axis and the Y-axis is shown.

  The above-mentioned two types of lighting each carry out a prototype standard, and the ceiling lighting device of the present invention adopts 75W. Comparing the operation of a conventional fluorescent lamp under the 90 W condition, when both operating temperatures are 55 ° C., a comparative measurement with a fluorescent lamp at a projection distance of 1.6 meters and a projection distance of 1.2 meters, respectively, Within 0-1.5 meters, the brightness can satisfy the reading luminous flux, and the brightness is very close to the fluorescent lamp, and may even exceed the fluorescent lamp depending on the axis. The above comparison conditions are comparisons when the ceiling lighting device of the present invention and a conventional fluorescent lamp are used.

The numerical values obtained by the X and Y axis luminance comparison measurement of the projection surface are shown in the following Tables 1 and 2.

  As shown in FIG. 13, since the LED light emitting unit 4 is installed on the side of the ceiling lighting device 10 of the present invention, it is necessary to consider the problem of wear due to the structural position and waste heat generated by the light emitting unit 4. The frame 6 is used as a single unit, and a tank portion 67 for mounting the light emitting unit 4 is formed inside the frame 6, and the frame 6 is further provided with a fixed plate 64 and a support plate 65, and a light guide plate therebetween. 1, the reflection plate 2, and the optical diffusion plate 3 can be sandwiched and fixed by the coupling member 60. Similarly, four frames 6 are formed on the four sides of the light guide plate 1, and the light guide plate 1, the reflection plate 2, and the optical diffusion plate 3 are fixed using a separate coupling member 60 by connecting the frames 6 to each other by an arbitrary connection method. To do. Among them, the buffer piece 63 can be installed so that the coupling member 60 does not directly push the reflection plate 2 or the light guide plate 1.

  The upper end of the frame 6 is extended to provide heat radiating fins 68, and the heat radiating fins 68 are installed upward so as not to occupy the horizontal space of the lightweight steel frame sash 8. When the horizontal space is sufficient, the radiating fins 68 can be installed horizontally, and further, the radiating fins 68 are brought into contact with the room air downward so as not to affect the appearance of the lightweight steel frame sash 8. A better heat exchange effect can be obtained.

  Among them, the frame 6 employs a metal material having a relatively high thermal conductivity coefficient such as an aluminum alloy, and is further fixed between the tank portion 67 and the light emitting unit 4 with a heat conductive adhesive, so that heat conduction can be performed quickly. Like that.

  The lightweight steel frame sash 8 is attached to the indoor ceiling using a hook 81 and forms a space within the length distance of the hook 81, and the space satisfies the need for accommodation of the radiation fin 68 and the radiation space. Assumption.

  The heat dissipating fin 68 formed by extending above the frame 6 has a certain height, forms a hollow cavity in the upper part of the ceiling lighting device 10, and the drive power supply 7 can be installed in the position of the hollow cavity. The electric power provided by the driving power source 7 is connected to the LED light emitting unit 4 by a circuit to supply electric power to the light emitting unit 4, and the driving power source 7 is simultaneously fixed by the coupling member 60. The drive power supply 7 is coupled to the buffer piece 63 in such a manner that it is connected to the plate, and the drive power supply 7 can be positioned and fixed at the same time as the coupling member 60 is screwed together.

  As shown in FIGS. 14 and 15, the present invention is implemented based on the principle of forward and diverted light flux by installing the LED light emitting unit 4 on the light incident surface 100 on the side surface of the light guide plate 1 to introduce the light flux. Among them, since the light incident surface 100 is parallel and symmetric on opposite sides, the light emitting unit 4 is similarly symmetric (see the method of FIG. 2), and the light incident surface 100 of the light guide plate 1 is parallel on at least both sides. In the case of increasing the number, the light incident surface 100 is provided on all four side surfaces, and the light emitting unit 4 can be installed correspondingly. In the present invention, if the light incident surface 100 is installed basically symmetrically and in parallel, it is possible to meet the illumination needs of the light projecting area.

  As described above, when two sets of LED light emitting units 4 opposed to each other on the two opposite sides of the light guide plate 1 are implemented, the two emitted light beams B generated are linearly opposed and emitted. When the light plate 1 is square and the irradiation angle is defined as θ ° ∠, the projected illumination light beam basically forms a rectangular projection frame 91, and when a radiation action is further applied, the projection area 9 becomes the rectangular projection frame 91. Receives a round shape.

  In order to obtain a fringe shape with a more uniform projection area 9, a light incident surface 100 is implemented on each side of the light guide plate 1 (see FIG. 15), and the LED light emitting unit 4 is combined logarithmically, and then a plurality of launches are performed. Forming a light beam B and emitting a plurality of light beams relative to each other, generating two intersecting rectangular projection frames 91 and rectangular projection frames 92 based on the standardized irradiation angle θ ° ∠, and further providing a radiation effect As a result, it is possible to obtain a projection area 9 whose contour shape is relatively close to a circle.

  The arrangement of the light incident surface 100 is determined by the number of symmetrical sides of the light guide plate 1. When the light guide plate 1 is a symmetrical polygon, the light incident surface 100 and the LED light emitting unit 4 are arranged on all sides. The projected area 9 can be made closer to a circle.

DESCRIPTION OF SYMBOLS 1 Light guide plate 10 Ceiling illuminating device 100 Light-incident surface 11 Reflective surface 12 Refractive surface 13 Reflective member
130 reflective curved surface 131 coupling interface 2 reflective plate 20 reflective surface 3 optical diffuser plate 4 LED light emitting unit 41 light emitting chip 42 substrate 5 heat conduction unit 6 frame 60 coupling member 61 upper frame 62 lower frame 63 buffer piece 64 fixing plate 65 support plate 66 Joint part 67 Tank part 7 Drive power supply 8 Light steel frame sash 80 Ceiling board 81 Hook 9 Projection area 91, 92 Rectangular projection frame
L light path
L ₁ and L ₂ intervals
n normal
B Launch beam
Bn Illumination light
B ₀ , B ₁ , B ₂ , B ₃ luminous flux
_{B 10, B 20, B 30} , B 3r reflected light beam
B _1t , B _2t , B _3t refracted light beam
B _1r return beam
L ₀ vertical line

Claims (10)

It is a plate-like ceiling lighting device that is used for indoor ceilings and projects light to a limited area of the floor surface with a limited projection angle,
A reflecting surface is provided on one surface, a refracting surface is provided on another surface, a reflecting member is provided on the reflecting surface, and light incident surfaces are provided on at least opposite sides, and a plurality of light emitting members are provided on each light incident surface. A generally symmetric polygonal fiber light guide plate that is arranged side by side and whose luminous flux is introduced into the light incident surface;
A plurality of light emitting members arranged side by side on the outer side of the light incident surface are installed, coupled with the light emitting members, and surrounding the periphery of the light guide plate, and having heat conduction capability, and waste heat of the light emitting members With a frame that can be derived,
An optical diffusion plate coupled to the outer surface of the light guide plate.
A reflective plate coupled to a reflective surface of the light guide plate;
And an electronic driving circuit for providing operating power to the light emitting member,
Among them, a plurality of reflecting members are further coupled to the reflecting surface of the light guide plate, the reflecting member is a spherical body projecting outward, a circular reflecting curved surface is formed on the inside, and the particle size of the light guiding plate is The distance from the center of the surface gradually decreases toward the light incident surface, and the adjacent distance gradually decreases toward the light incident surface with respect to the adjacent distance at the center of the light guide plate. A plurality of reflective members installed in an increased number;
An electronic drive circuit for providing operating power to the light emitting member;
A diode refraction type ceiling lighting device, comprising:
2. The diode according to claim 1, wherein the particle diameter of the reflection member is gradually reduced toward the outside by a geometric series method with reference to a particle in the center of the reflection surface. Refractive ceiling lighting device. 2. The diode refraction method according to claim 1, wherein the distance between the adjacent reflection member members increases toward the outside in a geometric series manner with reference to the center of the reflection surface. Ceiling lighting device. 2. The diode-refractive ceiling illumination according to claim 1, wherein a particle size of the reflection member is twice as large as that at the center of the light guide plate at the outermost side near the light incident surface. apparatus. 2. The diode-refractive ceiling illumination according to claim 1, wherein a distance between adjacent reflectors is twice as short as that at the center of the light guide plate outside the light incident surface. 3. apparatus. The diode refraction type ceiling lighting device according to claim 1, wherein the reflection member is formed integrally with the light guide plate. 2. The diode-refractive ceiling lighting device according to claim 1, wherein the reflecting member is printed with optical ink. The diode refraction type ceiling lighting device according to claim 1, wherein the frame is formed by coupling and fixing an upper frame and a lower frame with a coupling member. The diode refraction type ceiling lighting device according to claim 1, wherein the light incident surface is provided on each side of the light guide plate. The frame is formed by integral molding, has a tank part for installing the light emitting member, is provided with heat radiation fins extending on one side, and a fixing plate and a support plate for holding the light guide plate inside The diode refraction type ceiling lighting device according to claim 1, wherein:

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