CN103565396A - Visual chart light box with light guide plate of submicrometer structure - Google Patents
Visual chart light box with light guide plate of submicrometer structure Download PDFInfo
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- CN103565396A CN103565396A CN201310554562.6A CN201310554562A CN103565396A CN 103565396 A CN103565396 A CN 103565396A CN 201310554562 A CN201310554562 A CN 201310554562A CN 103565396 A CN103565396 A CN 103565396A
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Abstract
The invention relates to a visual chart light box with a light guide plate of a submicrometer structure. The visual chart light box comprises a frame body, an LED light source and the light guide plate, the LED light source and the light guide plate are arranged in the frame body, a visual chart is arranged on the front face of the light guide plate, the light guide plate is of a two-sided micro structure, the front face of the light guide plate is of a diffusion structure, the back face of the light guide plate is provided with light guide lattice points processed through the reel-to-reel hot-pressing technology, the back face of the light guide plate is further provided with a light reflection plate, and the LED light source is attached to the two sides of the light guide plate. The visual chart light box has the advantages of being high in luminance of emitted light, even in emitted light, free of dazzle light and flickers and high in response speed, the thickness can be smaller than 10mm, and the visual chart light box is ultra-thin and attractive in appearance.
Description
Technical field
The eyesight test chart lamp box that the present invention relates to give a test of one's eyesight, is specifically related to a kind of submicrometer structure LGP eyesight test chart lamp box.
Background technology
Adopt artificially lighting eyesight test chart lamp box to be widely used in clinical diagnosis, the fields such as mirror, health check-up are joined in optometry.The eyesight test chart lamp box generally using is at present all that 10CM is thick, in-built 2 common fluorescent tubes, employing retro-illumination is luminous, and technique is simple but it has obvious shortcoming: one, along with daylight lamp is opened and use its brightness of asynchronism(-nization) difference to some extent, cause the lightness environment that detects unstable; There is stroboscopic in two, brightness irregularities on visual acuity chart, and light, the accuracy that affects one's power of vision and detect; Three, fluorescent tube power consumption is large, and service life is short, and discarded daylight lamp can cause environmental pollution, and lamp box volume is large, thick and heavy, carries inconvenience, and profile is attractive in appearance not.
Summary of the invention
The object of the invention is to overcome the problem that prior art exists, provide that a kind of thickness is little, energy-saving and environmental protection, ultrathin visual chart lighting box that vision accuracy in detection is high.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the present invention is achieved through the following technical solutions:
A kind of submicrometer structure LGP eyesight test chart lamp box, comprise framework and be arranged at LED light source and the LGP in described framework, before described LGP, be provided with visual acuity chart, described LGP is double-side micro structure LGP, and its front is diffusion structure, the back side is the leaded light site of volume to volume heat pressing process, and the back side of described LGP is also provided with reflector, and described LED light source close neighbour is arranged at the both sides of described LGP.
Further, described LED light source is high-brightness LED.
Further, the diffusion structure in described LGP front is submicron grating mechanism, and the leaded light site of described LGP reverse side is circular microlens pit.
Preferably, the micro structure on described LGP surface adopts volume to volume heat pressing process to make.
Preferably, described LGP is optical grade PC or acrylic material.
The invention has the beneficial effects as follows:
Adopt technical solution of the present invention, there is luminosity high, evenly, without dazzling light, flicker free, reaction is fast, and thickness can be less than 10mm, and profile is ultra-thin attractive in appearance.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the side schematic view of LGP;
Fig. 3 is the front schematic view of LGP;
Fig. 4 is the reverse side schematic diagram of LGP.
Number in the figure explanation: 1, LED light source, 2, visual acuity chart, 3, LGP, 4, reflector.
The specific embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, a kind of submicrometer structure LGP eyesight test chart lamp box, comprise framework and be arranged at LED light source 1 and the LGP 3 in described framework, described LGP 3 is provided with visual acuity chart 2 above, described LGP 3 is double-side micro structure LGP, and described LGP 3 fronts are diffusion structure, and the back side is the leaded light site of volume to volume heat pressing process, the back side of described LGP 3 is also provided with reflector 4, and described LED light source 1 close neighbour is arranged at the both sides of described LGP 3.
Further, described LED light source 1 is high-brightness LED, and wherein LED lamp pearl model adopts 3014 or 5630, and the LGP end face that described LGP 3 approaches LED bright dipping position is thickened to processing.
Further, the diffusion structure in described LGP 3 fronts is submicron grating mechanism, and the leaded light site of described LGP 3 reverse side is circular microlens pit.
Preferably, the micro structure on described LGP 3 surfaces adopts volume to volume heat pressing process to make.
Preferably, described LGP 3 is optical grade PC or acrylic material.
Principle of the present invention:
By regulating the brightness of LED light source 1, regulate the brightness of visual acuity chart, can detect different illumination conditions lower testers' vision.In the leaded light site of the bottom of LGP 3, utilize refraction and the scattering principle of light, when light incides site, a light scatter can be become to many light, a light part for these scatterings can penetrate LGP, another part can continue reflection, until run into next leaded light site, repeat scattering process.Due to stronger near near light intensity light source, so the size in the density near bottom surface of light guide plate leaded light site, light source place and site is less, and larger away from the size of light source place bottom surface of light guide plate dot density and site, by this distribution, realize the uniformity of LGP output intensity.There is submicron grating diffusion structure in the front of LGP, and this diffusion structure makes the light that penetrates LGP perpendicular to LGP outgoing, to make light more even in the surface distributed of LGP simultaneously.By the reflector 4 at two side light sources at LGP 3 and LGP 3 back sides, the utilization rate that raising light source emits beam is irradiated on visual acuity chart through LGP 3 and reflector 4 again, therefore luminous than traditional retro-illumination, not only luminosity is even, stable, soft for the method backlight of lamp box of the present invention, free from glare, flicker free, and thickness can greatly reduce.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (5)
1. a submicrometer structure LGP eyesight test chart lamp box, comprise framework and be arranged at LED light source (1) and the LGP (3) in described framework, described LGP (3) is provided with visual acuity chart (2) above, it is characterized in that, described LGP (3) is double-side micro structure LGP, described LGP (3) front is diffusion structure, the back side is the leaded light site of volume to volume heat pressing process, the back side of described LGP (3) is also provided with reflector (4), and described LED light source (1) close neighbour is arranged at the both sides of described LGP (3).
2. submicrometer structure LGP eyesight test chart lamp box according to claim 1, is characterized in that, described LED light source (1) is high-brightness LED.
3. submicrometer structure LGP eyesight test chart lamp box according to claim 1, is characterized in that, the positive diffusion structure of described LGP (3) is submicron grating mechanism, and the leaded light site of described LGP (3) reverse side is circular microlens pit.
4. according to the submicrometer structure LGP eyesight test chart lamp box described in claim 1 and 3, it is characterized in that, the micro structure on described LGP (3) surface adopts volume to volume heat pressing process to make.
5. submicrometer structure LGP eyesight test chart lamp box according to claim 4, is characterized in that, described LGP (3) is optical grade PC or acrylic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310554562.6A CN103565396A (en) | 2013-11-11 | 2013-11-11 | Visual chart light box with light guide plate of submicrometer structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310554562.6A CN103565396A (en) | 2013-11-11 | 2013-11-11 | Visual chart light box with light guide plate of submicrometer structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103565396A true CN103565396A (en) | 2014-02-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310554562.6A Pending CN103565396A (en) | 2013-11-11 | 2013-11-11 | Visual chart light box with light guide plate of submicrometer structure |
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| CN (1) | CN103565396A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106895311A (en) * | 2017-04-22 | 2017-06-27 | 东莞市视优医疗科技有限公司 | A kind of Multifunctional eyesight table lamp |
| CN109645952A (en) * | 2017-10-12 | 2019-04-19 | 李长良 | Green background eyesight detects lamp box |
| CN109920365A (en) * | 2017-12-11 | 2019-06-21 | 上海航空电器有限公司 | A kind of system and method for display human eye vision evaluation sighting target |
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| CN1607435A (en) * | 2003-10-16 | 2005-04-20 | 鸿富锦精密工业（深圳）有限公司 | Backlight module |
| CN2745507Y (en) * | 2004-06-30 | 2005-12-14 | 中国人民解放军海军总医院 | Ultrathin visual chart lighting box |
| CN201578222U (en) * | 2009-06-17 | 2010-09-15 | 北京大学第三医院 | Visual chart lamp box with adjustable illumination |
| CN201612596U (en) * | 2010-01-28 | 2010-10-27 | 杜学静 | Ultrathin visual chart lamp box |
| CN201831872U (en) * | 2010-10-09 | 2011-05-18 | 崔诗唯 | Anti-dazzling visual testing chart |
| CN203647322U (en) * | 2013-11-11 | 2014-06-18 | 苏州卫生职业技术学院 | Visual testing chart lamp box with submicrostructural light guide plate |
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2013
- 2013-11-11 CN CN201310554562.6A patent/CN103565396A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1607435A (en) * | 2003-10-16 | 2005-04-20 | 鸿富锦精密工业（深圳）有限公司 | Backlight module |
| CN2745507Y (en) * | 2004-06-30 | 2005-12-14 | 中国人民解放军海军总医院 | Ultrathin visual chart lighting box |
| CN201578222U (en) * | 2009-06-17 | 2010-09-15 | 北京大学第三医院 | Visual chart lamp box with adjustable illumination |
| CN201612596U (en) * | 2010-01-28 | 2010-10-27 | 杜学静 | Ultrathin visual chart lamp box |
| CN201831872U (en) * | 2010-10-09 | 2011-05-18 | 崔诗唯 | Anti-dazzling visual testing chart |
| CN203647322U (en) * | 2013-11-11 | 2014-06-18 | 苏州卫生职业技术学院 | Visual testing chart lamp box with submicrostructural light guide plate |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106895311A (en) * | 2017-04-22 | 2017-06-27 | 东莞市视优医疗科技有限公司 | A kind of Multifunctional eyesight table lamp |
| CN109645952A (en) * | 2017-10-12 | 2019-04-19 | 李长良 | Green background eyesight detects lamp box |
| CN109920365A (en) * | 2017-12-11 | 2019-06-21 | 上海航空电器有限公司 | A kind of system and method for display human eye vision evaluation sighting target |
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Application publication date: 20140212 |