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WO2005019724A1 - A surface-light source-condensing stand - Google Patents

A surface-light source-condensing stand Download PDF

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Publication number
WO2005019724A1
WO2005019724A1 PCT/KR2003/001682 KR0301682W WO2005019724A1 WO 2005019724 A1 WO2005019724 A1 WO 2005019724A1 KR 0301682 W KR0301682 W KR 0301682W WO 2005019724 A1 WO2005019724 A1 WO 2005019724A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
unit
light source
condensing
stand
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2003/001682
Other languages
French (fr)
Inventor
Jung Sung Park
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to PCT/KR2003/001682 priority Critical patent/WO2005019724A1/en
Priority to AU2003253456A priority patent/AU2003253456A1/en
Publication of WO2005019724A1 publication Critical patent/WO2005019724A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S6/00—Lighting devices intended to be free-standing
    • F21S6/002—Table lamps, e.g. for ambient lighting
    • F21S6/003—Table lamps, e.g. for ambient lighting for task lighting, e.g. for reading or desk work, e.g. angle poise lamps
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S6/00—Lighting devices intended to be free-standing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V2200/00—Use of light guides, e.g. fibre optic devices, in lighting devices or systems
    • F21V2200/20—Use of light guides, e.g. fibre optic devices, in lighting devices or systems of light guides of a generally planar shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2105/00—Planar light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0051—Diffusing sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources

Definitions

  • the present invention generally relates to a surface-light-condensing stand for illumination, and more particularly to, a stand consisted of; the light source part made up of cold cathode fluorescent lamp (CCFL), which has long life and makes high brightness with low electric power, and high brightness LED; the light-inducing plate unit which is designed to induce a light source of light source part such as CCLF, to a uniform surface- light source; light diffusion part which is attached to front surface of the above- mentioned light-inducing plate ;
  • CCFL cold cathode fluorescent lamp
  • the first and the second condensing part which is located front side of the above- mentioned the light diffusing part light diffusion part and condense light by first and second order; the pellucid protection screen which protects surface of the above- mentioned light condensing part; the reflecting sheet part which reflects light from rear of the above-mentioned light-inducing plate to light-inducing plate ; the front/the rear case which combines and fixes the above-mentioned parts; inverter used for operating CCFL inverter and stand for supporting those parts.
  • the present invention stand, enables to adjust light range angle of every out coming light by ⁇ 20° to the vertical part of light
  • the formal stand uses reflecting cone behind the lamp or diffusion device added by obscure diffusion screen not to spread out the light. That is to say, the formal stand uses indirect illumination method.
  • cone should be bigger than usual to prevent spot phenomena, which diffuses to the side of the lamp and stimulates users eyes; structural problem that the cone should be located under use's eyes; in the case of using reflecting cone only, users get tired when using for a long time; lamp radiates heat when used for a long time and thus users feel uncomfortable and concentration would be lowed so efficiency of work or study can't be continued.
  • this inverter stand has some advantages such as; eyes can't sense the twinkle resulted from the change of voltage and intensity of illumination; various frequency band is added to the illumination light in order to make the light more natural, thus make less weariness on eyes even if used for a long time.
  • this method is also directly under illumination method, so there is a spot phenomenon, and still has structural problem that can't be portable because of complex structure, and another problem that the intensity of illumination is decreased proportion to distance.
  • indirect illumination method with backlight unit This is edge-light surface light source device and adapts (CCFL).
  • surface light source device using (CCFL) basically uses inverter circuit so that there is no twinkle.
  • life decrease owing to over current reaches to three times (10% of over current makes 50% of life decrease), however, in the case of this, reaches to 1.3 times only.
  • brightness of the surface light source is high but the intensity of the radiation is low, thus this is fit to a back light(offer lights from behind) of display device or a sign lamp.
  • this is not proper to illumination for stand because of low intensity of illumination.
  • this has low heat-radiation and low consumption of electricity, so it is used for notebook computer, liquid crystal TV, small LCD and photodetector of display of ad.
  • the present invention generally relates to a surface-light-condensing stand for illumination, and more particularly to, a stand consisted of; the light source part made up of cold cathode fluorescent lamp (CCFL), which has long life and makes high brightness with low electric power, and high brightness LED; the light-inducing plate unit which is designed to induce a light source of light source part such as CCLF, to a uniform surface- light source; light diffusion part which is attached to front surface of the above- mentioned light-inducing plate ; The first and the second condensing part which is located front side of the above- mentioned the light diffusing part light diffusion part and condense light by first and second order; the pellucid protection screen which protects surface of the above- mentioned light condensing part; the reflecting sheet part which reflects light from rear of the above-mentioned light-inducing plate to light-inducing plate ; the front/the rear case which combines and fixes the above-mentioned parts; inverter used for operating CCFL inverter
  • the light outgoing surface to condense light, thus protects visual power from spot phenomenal by side light or inclined light; enhances concentration and efficiency by minimizing dispersion when used in work such as study, reading and edition; excludes stress from dispersion of surrounding people.
  • Fig.1 shows an example of the invention when in used.
  • Fig.2 is an illustrative view of the present invention incised.
  • Fig.3 shows a deal drawing of the present invention.
  • Fig.4 is a profile of the invention as A-A line sectional diagram of Fig.2.
  • Fig.5 is a profile of the invention as B-B line sectional diagram of Fig.2.
  • Fig.6 and Fig.8 show an example view of light-inducing plate applied for the present invention.
  • Fig.9 and Fig.10 are an example view of white pellucid LED applied for the light source part.
  • Fig.9 shows the front side of the arranged situation.
  • Fig.10 is the same sectional diagram.
  • Fig.11 is a diagram of brightness distribution of the light condensing part by light-inducing plate unit, the light diffusing part and prism.
  • the present invention solves the problems mentioned above, minimizes electricity consumption required to stand and operates with high power saving. Also, it elongates the life of the lamp, so it aims to supply economical illumination stand.
  • the present invention has another purpose to supply illumination stand within present condition with; reducing diffusing light around emit-from-surface unit of stand almost vertically, thus making concentrated illumination around desired range and prevents effect to other people; preventing spotting and flickering, without sight trouble and tiredness of eyes.
  • the present invention has purpose to minimize the whole size and weight in order to carry along and store/use easily.
  • the present invention provides edge-light surface light source device which condenses and illuminates the light range angle to the vertical part of the light outgoing surface within ⁇ 20, as a light source for stand. So, it protects eyesight through removing glaring by side light or inclined surface light, and through minimizing unnecessary light. Thus, enhances concentration and efficiency by minimizing dispersion when used in work such as study, reading and edition; excludes stress from dispersion of surrounding people
  • the present invention is consisted of, CCFL which has
  • the light-inducing plate unit the light diffusing part which is installed in the front side of the above-mentioned light-inducing plate , a double the light condensing part which is
  • pellucid protection unit located on the front side of the above-mentioned the light diffusing part and concentrating light for two times, pellucid protection unit which protects the outside of
  • inverter to operate CCFL stand to support the above-mentioned inner
  • Fig 1 shows an example of the invention when in used
  • Fig 2 is an illustrative
  • FIG. 3 shows a deal drawing of the present invention
  • Fig 4 is a profile of the invention as A- A line sectional diagram of Fig 2, Fig.5
  • FIG. 1 is a profile of the invention as B-B line sectional diagram of Fig 2, Fig 6 and Fig 8 show
  • the light diffusing part (30) which is installed in the front side of the above-mentioned light-inducing plate (20); a double (40) the light condensing part which is located on the front side of the above-mentioned the light diffusing part (30), and concentrating light for two times; pellucid screen protection unit(50) which protects the outside of the above-mentioned the light condensing part (40); reflecting sheet unit (60) which reflects light from the above-mentioned light-inducing plate (20); the front/rear the case unit (70), (71) to combine above-mentioned parts; stand (80) which includes inverter to operate CCFL (11) of light source unit (10).
  • Light source unit (10) is consisted of CCFL which has much longer life than normal fluorescent light, FL(about lOtimes, and 20 times as light bulb) and has low power consumption as 1/5 of normal lamp.
  • This light source unit(l ⁇ ) plays a role of the first light source and installed parallel to the edge of the light emitting unit, light- inducing plate unit(20).
  • the second light emitting unit, light-inducing plate unit(20) is installed inside of the light source unit(l ⁇ ) of CCFL (11).
  • the second light emitting unit, light-inducing plate unit(20) is installed inside of the light source unit(l ⁇ ) of CCFL (11).
  • Incoming ray refraction unit(21),(22) has various structure such as dot, V-groove, ruggedness, prism or hologram, and is recorded and formed with various method such as silk printing, V-cutting, thermo-electric printing, stamping, emission, sanding.
  • This shape helps to induce light sources which comes to the edge of the second light emitting unit, light-inducing plate unit(20) and which is reflected from reflecting sheet unit(60) to the rear refraction unit(21) or the front refraction unit(22), in order to induce light to all over the front side of the light-inducing plate unit(20) and to refract, thus makes light to be illuminated all over the surface light source which has outgoing angle by ⁇ 50° as shown in Fig.11 (a).
  • the light-inducing plate unit(20) can be made to dispersing form which has light dispersing feature in the front or rear, and made to light condensing which has narrow eye angle .
  • dispersing form is made by dot pattern which is silk printed, and by sanding. Condensing form has V-groove, ruggedness or hologram structure.
  • dispersing form has sanding structure and condensing form has prism or hologram structure.
  • the structure of the light-inducing plate unit(20) can be a structure that dispersing form and condensing form, that is, one of dot pattern, V-groove, ruggedness, hologram is adapted and recorded only in the above-mentioned rear refraction unit(21).
  • dispersing and condensing is recorded in the rear and condensing structure, that is, prism or hologram is recorded in the front.
  • dispersing form should be the dot-pattern silk printed. Condensing form should have structure that V- groove, ruggedness or hologram is recorded. In the case of the structure of the refraction unit(22), dispersing form should have sanding structure and condensing form should have prism or hologram structure. Usually desired form for the present invention is that the shape of the refraction unit(22) is prism or hologram structure.
  • the light diffusing part(30) is made on the front area of the light- inducing plate unit(20).
  • Light diffusing unit(30) condenses leaking light from light- inducing plate unit(20) and make re-diffusion, thus condenses light vertically on the surface of the light-inducing plate unit(20) as shown in Fig.11(c), and plays a role of hiding the incoming light refraction unit(21),(22) structure.
  • the light diffusing part(30) is option to the front side f the light-inducing plate unit(20) but is desired to be installed for
  • light which is coming from light-inducing plate unit(20) or the light diffusing part(30) (40) can be recorded with prism or hologram.
  • condensing unit such as prism and hologram are recorded should be more than 1.
  • the above-mentioned light-condensing structure should be applied for the present invention
  • Pellucid screen protection unit(50) is made to protect light condensing unit such
  • Pellucid screen protection unit(50) protects light condensing unit such as prism
  • the reflecting sheet unit(60) which reflects leaking light by covering CCLF
  • the white sheet which titanium oxide (TiO ⁇ ) is added is proper for the reflecting sheet unit(60).
  • foil, and reflecting sheet are used. It doesn't matter even if that material has high reflecting property, but the efficiency and the cost should be considered.
  • the first light source the rear area of the second light emitting unit, light-inducing plate unit(20), the edge of the pellucid screen protection unit(50) of the light condensing part(40), and which reflects those lights back to light-inducing plate unit(20), thus
  • Case part (70) is consisted of the rear case (71) which is installed in pipe(81) that is
  • the thickness is about 2 ⁇ 20mm, so it is possible to make more or less thicker than it according to design condition and to make foil form stand.
  • the stand is unlimited according to customer's request and the size of the light- inducing plate unit(20). Also, it can be made to various forms such as circle, rectangle
  • unit (20) should be Rectangle Square or perfect square considering optical design.
  • CCLF of the present invention (11) can be
  • This inverter circuit changes the frequency of common electricity source 60 Hz to high frequency 50 ⁇ 90 kHz. This high frequency
  • Inverter circuit for the CCLF is divided to AC ⁇ ⁇ AC inverter (AC inverter) and AC ⁇ DC ⁇ AC (DC inverter).
  • AC inverter AC inverter
  • DC inverter DC inverter
  • Display device and DC inverter is used for LCD.
  • CCLF is mainly explained for the lamp of the light source unit(l ⁇ ), but the
  • light source unit(l ⁇ ) is not limited to this. As shown in Fig.9 and 10, arrange several
  • light source unit(l ⁇ ) that is, 4 CCLFs of which rating voltage is 12V, rating current is 13mA.
  • 2 sets of 2 (16W power consumption) in both side along the major direction and arrange two sets of 2 incoming light refraction units (21) of the rear in the edge of the light-inducing plate unit(2) where dot printed (27 cm x 10 cm) light-inducing plate unit(2).
  • the present stand has following features; in light source unit(l ⁇ ), 4 CCLFs (Total power consumption 16W) with rating voltage 12V, rating current 13mA, light is emitted.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Planar Illumination Modules (AREA)

Abstract

The present invention gets outgoing light of surface lightning condition by condensing light source of light source unit with light-inducing plate unit as vertical light and diffuses this and condenses again, thus makes the light range angle within ±20°. Therefore, this removes dispersing light around user so removes side light or flickering by inclined surface light and minimize undesired light. As a result, it enhances user's concentration in studying or working, and it minimize stress of the surrounding person. Also, the present invention uses edge light surface lightning illumination method, so it supplies bright and soft light with no tiredness thus protects eyesight. Additionally, the present invention uses CCLF or LED as the first light source, three-wave is not appeared and there is no flickering by inverter circuit. In addition, the life is long and power consumption is low so it has good energy efficiency. Also, it is possible to make it ultra-slim and potable, and easy-to-use.

Description

A SURFACE-LIGHT SOURCE-CONDENSING STAND BACKGROUND OF THE INVENTION
Field of the Invention:
The present invention generally relates to a surface-light-condensing stand for illumination, and more particularly to, a stand consisted of; the light source part made up of cold cathode fluorescent lamp (CCFL), which has long life and makes high brightness with low electric power, and high brightness LED; the light-inducing plate unit which is designed to induce a light source of light source part such as CCLF, to a uniform surface- light source; light diffusion part which is attached to front surface of the above- mentioned light-inducing plate ;
The first and the second condensing part which is located front side of the above- mentioned the light diffusing part light diffusion part and condense light by first and second order; the pellucid protection screen which protects surface of the above- mentioned light condensing part; the reflecting sheet part which reflects light from rear of the above-mentioned light-inducing plate to light-inducing plate ; the front/the rear case which combines and fixes the above-mentioned parts; inverter used for operating CCFL inverter and stand for supporting those parts. The present invention, stand, enables to adjust light range angle of every out coming light by ±20° to the vertical part of light
out coming surface the light outgoing surface to condense light, thus protects visual power from spot phenomenal by side light or inclined light; enhances concentration and efficiency by minimizing dispersion when used in work such as study, reading and edition; excludes stress from dispersion of surrounding people. l Description of the Prior Art:
In general, most of the stand illuminator used in the house or office for study or work is consisted of socket covered with reflecting cone, a fluorescent light or a glow lamp put in the socket; and is designed to illuminate the front side of the reflecting cone with reflecting cone, by a method so called, directly under method.
However, with the formal directly-under form illuminator, there are several defects such as; spot phenomena, that is, only around the light source is bright; stimulation of eyes and getting tired because of the bright line from the light source; efficiency of illumination is low. Moreover, there are inconveniences such as, the fluorescent light or the light bulb need to be changed frequently because of their short life and high electric power; the socket part is getting thick because of a structure of light bulb and reflecting cone used for protect those bulbs, thus carrying along is not possible.
Moreover, most of the stand is used to concentrate the light from the light source, or to make spot light for home or official use. In order to achieve those function, the formal stand uses reflecting cone behind the lamp or diffusion device added by obscure diffusion screen not to spread out the light. That is to say, the formal stand uses indirect illumination method.
However in the formal case that only uses reflecting cone, there are several problems such as; cone should be bigger than usual to prevent spot phenomena, which diffuses to the side of the lamp and stimulates users eyes; structural problem that the cone should be located under use's eyes; in the case of using reflecting cone only, users get tired when using for a long time; lamp radiates heat when used for a long time and thus users feel uncomfortable and concentration would be lowed so efficiency of work or study can't be continued.
Meanwhile, in the other case of using semi or obscure diffusion screen, glaring problem can be solved but intensity of illumination to the wanted area is lowed, that is, indirect illumination. Thus in order to illuminate efficiently to the required area, lamp wattage should be increased or additional direct illuminator should be used. Thus results energy waste.
In addition, most of the formal illuminator uses light bulb and fluorescent light, and most of them use common electricity directly to the lamp. And besides, brightness of the illuminator changes in proportion to the change of incoming voltage. Common electricity source has frequency of 60Hz so voltage is getting changed continuously. Therefore, there is fine twinkle according to the change of frequency and the intensity of illumination of the lamp. In case of using those light sources for a long time, eyes get more stimulation and get tired. As well as, the light has mono-color compare with nature light, thus adding an extra exhaustion to the eyes. In order to solve problems of formal stand as mentioned above, inverter stand is used now days. This inverter stand changes common voltage frequency of 60Hz to high frequency from 50 ~ 90 kHz. Thus this inverter stand has some advantages such as; eyes can't sense the twinkle resulted from the change of voltage and intensity of illumination; various frequency band is added to the illumination light in order to make the light more natural, thus make less weariness on eyes even if used for a long time.
However, this method is also directly under illumination method, so there is a spot phenomenon, and still has structural problem that can't be portable because of complex structure, and another problem that the intensity of illumination is decreased proportion to distance.
Considering those aspect, indirect illumination method with backlight unit. This is edge-light surface light source device and adapts (CCFL). However, surface light source device using (CCFL) basically uses inverter circuit so that there is no twinkle. Further more, for the normal lamp, life is getting decreased sharply because of flickering but not for CCFL. Life decrease is not occurred. In the case of the normal illumination lamp, life decrease owing to over current reaches to three times (10% of over current makes 50% of life decrease), however, in the case of this, reaches to 1.3 times only. In this case, brightness of the surface light source is high but the intensity of the radiation is low, thus this is fit to a back light(offer lights from behind) of display device or a sign lamp. However, it is not proper to illumination for stand because of low intensity of illumination. In addition, this has low heat-radiation and low consumption of electricity, so it is used for notebook computer, liquid crystal TV, small LCD and photodetector of display of ad.
SUMMARY OF THE INVENTION
The present invention generally relates to a surface-light-condensing stand for illumination, and more particularly to, a stand consisted of; the light source part made up of cold cathode fluorescent lamp (CCFL), which has long life and makes high brightness with low electric power, and high brightness LED; the light-inducing plate unit which is designed to induce a light source of light source part such as CCLF, to a uniform surface- light source; light diffusion part which is attached to front surface of the above- mentioned light-inducing plate ; The first and the second condensing part which is located front side of the above- mentioned the light diffusing part light diffusion part and condense light by first and second order; the pellucid protection screen which protects surface of the above- mentioned light condensing part; the reflecting sheet part which reflects light from rear of the above-mentioned light-inducing plate to light-inducing plate ; the front/the rear case which combines and fixes the above-mentioned parts; inverter used for operating CCFL inverter and stand for supporting those parts. The present invention, stand, enables to adjust light range angle of every out coming light by +20° to the vertical part of
light outgoing surface the light outgoing surface to condense light, thus protects visual power from spot phenomenal by side light or inclined light; enhances concentration and efficiency by minimizing dispersion when used in work such as study, reading and edition; excludes stress from dispersion of surrounding people.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig.1 shows an example of the invention when in used. Fig.2 is an illustrative view of the present invention incised.
Fig.3 shows a deal drawing of the present invention.
Fig.4 is a profile of the invention as A-A line sectional diagram of Fig.2.
Fig.5 is a profile of the invention as B-B line sectional diagram of Fig.2.
Fig.6 and Fig.8 show an example view of light-inducing plate applied for the present invention.
Fig.9 and Fig.10 are an example view of white pellucid LED applied for the light source part. Fig.9 shows the front side of the arranged situation. Fig.10 is the same sectional diagram.
Fig.11 is a diagram of brightness distribution of the light condensing part by light-inducing plate unit, the light diffusing part and prism. DETAILED DESCRIPTION
The present invention solves the problems mentioned above, minimizes electricity consumption required to stand and operates with high power saving. Also, it elongates the life of the lamp, so it aims to supply economical illumination stand.
Also, the present invention has another purpose to supply illumination stand within present condition with; reducing diffusing light around emit-from-surface unit of stand almost vertically, thus making concentrated illumination around desired range and prevents effect to other people; preventing spotting and flickering, without sight trouble and tiredness of eyes.
Also, the present invention has purpose to minimize the whole size and weight in order to carry along and store/use easily.
In addition, the present invention provides edge-light surface light source device which condenses and illuminates the light range angle to the vertical part of the light outgoing surface within ± 20, as a light source for stand. So, it protects eyesight through removing glaring by side light or inclined surface light, and through minimizing unnecessary light. Thus, enhances concentration and efficiency by minimizing dispersion when used in work such as study, reading and edition; excludes stress from dispersion of surrounding people
To achieve those purpose, the present invention is consisted of, CCFL which has
much longer life than normal fluorescent light, FL(about lOtimes, and 20 times as light bulb and has low power consumption as 1/5 of normal lamp, dispersing or concentrating
light-inducing plate unit, the light diffusing part which is installed in the front side of the above-mentioned light-inducing plate , a double the light condensing part which is
located on the front side of the above-mentioned the light diffusing part and concentrating light for two times, pellucid protection unit which protects the outside of
the above-mentioned the light condensing part, reflecting sheet unit which reflects light
from the above-mentioned light-inducing plate , the case unit to combine above-
mentioned parts, inverter to operate CCFL, stand to support the above-mentioned inner
devices Desired examples are followed in the drawings
DETAILED DESCRIPTION OF THE EMBODIMENTS Fig 1 shows an example of the invention when in used, Fig 2 is an illustrative
view of the present invention incised, Fig 3 shows a deal drawing of the present invention, Fig 4 is a profile of the invention as A- A line sectional diagram of Fig 2, Fig.5
is a profile of the invention as B-B line sectional diagram of Fig 2, Fig 6 and Fig 8 show
an example view of light-inducing plate applied for the present invention As illustrated below, the present invention is consisted of, light source unit(lθ) of
CCFL(l l), dispersing or concentrating light-inducing plate unit (20) to induce equal
surface light source, the light diffusing part (30) which is installed in the front side of the above-mentioned light-inducing plate (20); a double (40) the light condensing part which is located on the front side of the above-mentioned the light diffusing part (30), and concentrating light for two times; pellucid screen protection unit(50) which protects the outside of the above-mentioned the light condensing part (40); reflecting sheet unit (60) which reflects light from the above-mentioned light-inducing plate (20); the front/rear the case unit (70), (71) to combine above-mentioned parts; stand (80) which includes inverter to operate CCFL (11) of light source unit (10).
Light source unit (10) is consisted of CCFL which has much longer life than normal fluorescent light, FL(about lOtimes, and 20 times as light bulb) and has low power consumption as 1/5 of normal lamp. This light source unit(lθ) plays a role of the first light source and installed parallel to the edge of the light emitting unit, light- inducing plate unit(20).
Therefore, light source unit(lθ) of CCFL (11) is shaped to various form such as 1, •- , ■= , α and Δ in order to be arranged parallel to edge, according to the form of the light-inducing plate unit(20) even though the shape of light-inducing plate unit(20) is shaped to 1, <=> , 0 and Δ.
Then it is installed closely to the edge. Inside of the light source unit(lθ) of CCFL (11), the second light emitting unit, light-inducing plate unit(20), is installed in order to induce incoming light from the CCFL(11) to surface light source.
In the front or rear side of the second light emitting unit, light-inducing plate unit(20), incoming ray refraction unit(21) is installed in order to induce incoming ray to the front side of the light-inducing plate unit(20). Incoming ray refraction unit(21),(22) has various structure such as dot, V-groove, ruggedness, prism or hologram, and is recorded and formed with various method such as silk printing, V-cutting, thermo-electric printing, stamping, emission, sanding. Refraction unit (21),(22) shaped that dot, V-groove, ruggedness, prism or hologram are getting smaller along the concentric circle from the center of the light-inducing plate unit(20) to CCLF(11) of the light source unit(lθ). Or the mold of the cutting, ruggedness, and prism is getting smaller. This shape helps to induce light sources which comes to the edge of the second light emitting unit, light-inducing plate unit(20) and which is reflected from reflecting sheet unit(60) to the rear refraction unit(21) or the front refraction unit(22), in order to induce light to all over the front side of the light-inducing plate unit(20) and to refract, thus makes light to be illuminated all over the surface light source which has outgoing angle by ± 50° as shown in Fig.11 (a).
Therefore, the light-inducing plate unit(20) can be made to dispersing form which has light dispersing feature in the front or rear, and made to light condensing which has narrow eye angle .
In the case of making incoming ray refraction unit(21) in the rear of the light- inducing plate unit(20), dispersing form is made by dot pattern which is silk printed, and by sanding. Condensing form has V-groove, ruggedness or hologram structure. In the case of making refraction unit(22) in the front of the light-inducing plate unit(20), dispersing form has sanding structure and condensing form has prism or hologram structure. Thus, forms alternative of dispersing form, which has wide eye angle and condensing form which has narrow condensing.
However, the structure of the light-inducing plate unit(20) can be a structure that dispersing form and condensing form, that is, one of dot pattern, V-groove, ruggedness, hologram is adapted and recorded only in the above-mentioned rear refraction unit(21). When recording both of front and rear refraction unit(21),(22), dispersing and condensing is recorded in the rear and condensing structure, that is, prism or hologram is recorded in the front. Especially, when refraction unit(22) which has effect mentioned- above adapts light-inducing plate unit(20) recorded with condensing structure, the light diffusing part(30) and the light condensing part(40) is not needed to be added, thus it is most suitable for stand illuminator in the aspect of cost. However, in the case of adapting refraction unit(21),(22) with the sanding structure of light-inducing plate unit(20), as a result of experiment, it is shown that light diffusing efficiency and light condensing efficiency are decreased at the same time. Thus, this is not proper to the present invention. Therefore, in the case of the structure of the incoming light refraction unit(21) which is formed in the rear area of the light-inducing plate unit(20), dispersing form should be the dot-pattern silk printed. Condensing form should have structure that V- groove, ruggedness or hologram is recorded. In the case of the structure of the refraction unit(22), dispersing form should have sanding structure and condensing form should have prism or hologram structure. Mostly desired form for the present invention is that the shape of the refraction unit(22) is prism or hologram structure.
In addition, the light diffusing part(30) is made on the front area of the light- inducing plate unit(20). Light diffusing unit(30) condenses leaking light from light- inducing plate unit(20) and make re-diffusion, thus condenses light vertically on the surface of the light-inducing plate unit(20) as shown in Fig.11(c), and plays a role of hiding the incoming light refraction unit(21),(22) structure. The light diffusing part(30) is option to the front side f the light-inducing plate unit(20) but is desired to be installed for
the exterior.
In the above-mentioned light-inducing plate unit(20) or the front side of the light
diffusing unit(30), the light condensing part λH(40) is installed. This converts dispersing
light which is coming from light-inducing plate unit(20) or the light diffusing part(30) (40) can be recorded with prism or hologram. The light condensing part (40) where light
condensing unit such as prism and hologram are recorded should be more than 1. The above-mentioned light-condensing structure should be applied for the present invention
to achieve the purpose of the invention of removing light leakage in the side or inclined surface. Pellucid screen protection unit(50) is made to protect light condensing unit such
as prism and hologram recorded
Pellucid screen protection unit(50) protects light condensing unit such as prism
and hologram from damage. It is made of pellucid sheet material such as synthetic resin
sheet which has high light transmission rate and, is easy to clean. Also, the reflecting sheet unit(60) which reflects leaking light by covering CCLF
of light source unit(lθ) which take a function of the first light source, the rear area of the
second light emitting unit, light-inducing plate unit(20), the edge of the pellucid screen
protection unit(50) of the light condensing part(40), and which reflects those lights back to light-inducing plate unit(20), thus enhances light condensing efficiency. For this reason, the white sheet which titanium oxide (TiO∑ ) is added is proper for the reflecting sheet unit(60). As well as, normal metallic reflecting frame, aluminum
foil, and reflecting sheet are used. It doesn't matter even if that material has high reflecting property, but the efficiency and the cost should be considered.
All structures as mentioned-above, that is; the reflecting sheet unit(60) which
reflects leaking light by covering CCLF of light source unit(lθ) which take a function of
the first light source, the rear area of the second light emitting unit, light-inducing plate unit(20), the edge of the pellucid screen protection unit(50) of the light condensing part(40), and which reflects those lights back to light-inducing plate unit(20), thus
enhances light condensing efficiency; are combined or piled inside of the case part (70).
Case part (70) is consisted of the rear case (71) which is installed in pipe(81) that is
connected flexibly with a form of cymbals hose and the front case (73) which has fluoro
hole (72) in front of it.
In the rear case (71) and the front case (73), coupling hole (74) coupling groove
(75) are made to connect and disconnect each other. Above-mentioned the rear and the front case (73),(71) is used for combination and piling of the CCLF (11) of the light
source unit(lθ), light-inducing plate unit(20) which is the second light emitting unit, the light diffusing part(30), the light condensing part(40), pellucid screen protection unit(50)
and the reflecting sheet unit(60). Above-mentioned parts are protected by pellucid screen
protection unit(50) and the reflecting sheet unit(60). When combined with each other as
closely attached, the thickness is about 2 ~ 20mm, so it is possible to make more or less thicker than it according to design condition and to make foil form stand. The whole size
of the stand is unlimited according to customer's request and the size of the light- inducing plate unit(20). Also, it can be made to various forms such as circle, rectangle
square, perfect square, triangle, hexagon, and so on. You can change the shape by just changing the case unit(70) and is adjustable according to the shape of the light-inducing plate unit(20), thus you can make it light weight, and foil form. Consequently, portable and easy-to-handle stand can be made. Meanwhile, the shape of the light-inducing plate
unit (20) should be Rectangle Square or perfect square considering optical design.
Differently from normal lamp, CCLF of the present invention (11) can be
supplied power only by inverter circuit. This inverter circuit changes the frequency of common electricity source 60 Hz to high frequency 50 ~ 90 kHz. This high frequency
band has advantage that people can't realize the change of intensity of illumination according to changing of voltage shift. Inverter circuit for the CCLF is divided to AC~→ AC inverter (AC inverter) and AC→DC→AC (DC inverter). Generally, Ac inverter has
lower efficiency of changing high frequency than DC inverter, thus AC inverter is used
for ad. Display device and DC inverter is used for LCD.
Therefore, both of AC inverter and DC inverter can be used for the inverter
circuit of the present stand, but for high quality, DC inverter is desirable.
Meanwhile, CCLF is mainly explained for the lamp of the light source unit(lθ), but the
light source unit(lθ) is not limited to this. As shown in Fig.9 and 10, arrange several
white LEDs(12) at the edge of the light-inducing plate unit(20) and use them as the first
light source, you can have the same effect. In this case, it is easy to install power adaptor
that changes AC power to DC power. Also, easy to add cheap power supplier and have illumination effect and function, it is possible make mass product with cheaper cost than CCLF.
(Example)
As mentioned above, arrange light source unit(lθ), that is, 4 CCLFs of which rating voltage is 12V, rating current is 13mA. Or arrange 2 sets of 2 (16W power consumption) in both side along the major direction and arrange two sets of 2 incoming light refraction units (21) of the rear in the edge of the light-inducing plate unit(2) where dot printed (27 cm x 10 cm) light-inducing plate unit(2).
Then, operate inverter circuit and measure the intensity of illumination of the stand which comes from pellucid protection screen (50) by distance. And prepare formal stands, which are 27W-white and 27W-yellow inverter lamp stand and measure the intensity by distance with same condition of above. The result is shown in Tabl.
[Tab 1]
Figure imgf000015_0001
Distance(mm) As shown in the result value, formal 27W white inverter and yellow inverter [Cf : (A); intensity changing curve of the white inverter stand (B); intensity changing curve of the yellow inverter stand], high intensity, 130,000 Lux and 105,000 Lux are measured at near distance from each lightning surface of the lamp. When user's eyes are under the stand because of the wide light emitting angle and dispersing light, people feels spotting (flickering) severely and thus eyes are getting tired easily. And because of the light dispersing owing to light emitting angle, intensity of illumination is getting lowed sharply 10cm from the lamp. At 40cm, it reaches under 10,000Lux and even far from 40cm, illumination effect is notably decreased nevertheless of high consumption of electricity power. That is, it has short illumination distance (within 40 cm from the lamp.)
Meanwhile, the present stand has following features; in light source unit(lθ), 4 CCLFs (Total power consumption 16W) with rating voltage 12V, rating current 13mA, light is emitted. By the second light emitting unit, light-inducing plate unit(20), and the light diffusing part(30), the light condensing part(40), light is reflected-condensed- diffused-condensed and repeated, so outgoing light from the pellucid screen protection unit(50) is emitted within ±20° nearly to the center-vertical line and emitted in
concentrate, thus condensing efficiency is increased. As well as, all outgoing light which pass through the pellucid screen protection unit(50) is condensed within ± 20° nearly
vertical to the central line and is emitted. Therefore, even if user's eyes are under pellucid screen protection unit(50), there is no dispersing light to user thus there is no spotting. Consequently, user can't feel any tiredness or flickering, and change of the intensity of illumination is not occurred sharply within pellucid protection screen(50) distance(10cm ~ 50cm ) nevertheless of less consumption of power about 1/10 of the formal inverter stand. Even distance over 30cm, there is higher intensity than inverter stand. That means effective illumination distance from pellucid screen protection unit(50) to illumination area is getting longer.

Claims

WHAT IS CLAIMED IS:
1 Surface light source light condensing stand which is consisted of the following
parts; light source unit which is consisted of edge-light surface light source device; light- inducing plate unit which induces light from light source of CCLF to equal surface light
source; the light diffusing part is installed in the front side of the above-mentioned light- inducing plate and diffuses light; the first and the second the light condensing part which
condenses light in front of the above-mentioned the light diffusing part; pellucid screen protection unit which protects above-mentioned the light condensing part's surface;
reflecting sheet unit which reflects light from the rear area of the above-mentioned light- inducing plate to light-inducing plate ; the front and the rear case which combines and
fixes the above-mentioned parts; inverter to operate the light source unit and stand to
support those inverters.
2. In the CLAIM 1,
Surface light source light condensing stand which has the features; light source
unit, which is consisted of edge-light surface light source device, includes CCFL which has long life and makes high brightness with low power consumption.
3. In the CLAIM 1,
Surface light source light condensing stand which has the features; light source
unit consisted of edge-light surface light source device, includes white pellucid LED
which has long life and makes high brightness with low power consumption.
4. In the CLAIM 1, Surface light source light condensing stand which has the features; incoming light
refraction unit which induces incoming light in the front or the rear of the second light
emitting unit, light-inducing plate unit, to the front side of the light-inducing plate unit
5. In the CLAIM 1 or 4, Surface light source light condensing stand which has the features; incoming light
refraction unit which is installed in the front side of the light-inducing plate unit(20) has various structures such as dot V-groove, ruggedness, prism, or hologram and, is recorded
and formed with silk print, V-cutting, thermo-electric printing, stamping, emission,
sanding.
6. In the CLAIM 1 or 5,
Surface light source light condensing stand which has the features; refraction unit
(21),(22) shaped that dot, V-groove, ruggedness, prism or hologram are getting smaller
along the concentric circle from the center of the light-inducing plate unit(20) to CCLF(l l) of the light source unit(lθ).
7. In the CLAIM 1,
Surface light source light condensing stand which has the features; has the light
condensing part light condensing unit is recorded on. Light condensing unit converts to
light and closes up of the light range angle vertically to the front side of light-inducing plate unit, such as prism, hologram in the front of light-inducing plate unit. The light
condensing part should be one more.
8. In the CLAIM 1 or 7, Surface light source light condensing stand which has the features; the light range angle of the outgoing light in the light condensing part where light condensing unit such
as prism, hologram is recorded, should be condensed within ± 20° of the vertical side of the light outgoing surface
9. In the CLAIM 1,
Surface light source light condensing stand which has the features; arrange edge-
light light source unit parallel to the edge of the second light emitting unit, light-inducing
plate unit
10. In the CLAIM 1, Surface light source light condensing stand which has the features ; 2nd light
emitting unit light-inducing plate unit, and edge-light light source unit which is
connected parallel to the edge of the second light emitting unit, light-inducing plate unit,
include structures such as triangle, circle, square, polygon.
11. In the CLAIM 1, Surface light source light condensing stand which has the features ;The case which contains light source device is about 2 ~ 20mm thick.
PCT/KR2003/001682 2003-08-20 2003-08-20 A surface-light source-condensing stand Ceased WO2005019724A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/KR2003/001682 WO2005019724A1 (en) 2003-08-20 2003-08-20 A surface-light source-condensing stand
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2425168A (en) * 2005-04-15 2006-10-18 Taiwan Green Point Entpr Co Lt Table lamp having planar light guide
WO2008044175A3 (en) * 2006-10-09 2008-08-14 Koninkl Philips Electronics Nv A lamp and use thereof
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CN101858523A (en) * 2010-06-18 2010-10-13 宜昌劲森照明电子有限公司 Cold cathode arc grille lamp
CN111271657A (en) * 2020-03-06 2020-06-12 中国科学院半导体研究所 Illumination device and manufacturing method for regular N-shaped intelligent LED light guide plate used in aquaculture

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