CN203647322U - Visual testing chart lamp box with submicrostructural light guide plate - Google Patents
Visual testing chart lamp box with submicrostructural light guide plate Download PDFInfo
- Publication number
- CN203647322U CN203647322U CN201320705923.8U CN201320705923U CN203647322U CN 203647322 U CN203647322 U CN 203647322U CN 201320705923 U CN201320705923 U CN 201320705923U CN 203647322 U CN203647322 U CN 203647322U
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- China
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- lgp
- light guide
- guide plate
- lamp box
- chart lamp
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Abstract
The utility model discloses a visual testing chart lamp box with a submicrostructural light guide plate. The visual testing chart lamp box comprises a frame body, as well as LED (light-emitting diode) light sources and the light guide plate, which are arranged in the frame body, wherein a visual testing chart is arranged in front of the light guide plate; the light guide plate is a double-sided microstructural light guide plate, a diffusion structure is arranged on the front surface of the light guide plate, and light guide lattice points for a roll-to-roll hot pressing process are arranged on the back surface of the light guide plate; a reflector is also arranged on the back surface of the light guide plate; the LED light sources are adjacently arranged on the two sides of the light guide plate. The visual testing chart lamp box is high in illumination brightness, uniform, free of glare and flicker, quick in response and ultrathin and attractive in appearance, and can be thinner than 10mm.
Description
Technical field
This utility model relates to the eyesight test chart lamp box giving a test of one's eyesight, and 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 field such as mirror, health check-up is 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: its brightness of asynchronism(-nization) difference to some extent of one, opening and using along with daylight lamp, causes the lightness environment of detection 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.
Utility model content
The purpose of this utility model is to overcome the problem that prior art exists, and provides 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, this utility model 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 beneficial effects of the utility model are:
Adopt technical solutions of the utility model, 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 utility model;
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 this utility model 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 utility model:
By regulating the brightness of LED light source 1, regulate the brightness of visual acuity chart, can detect different illumination conditions lower testers' vision.Utilize refraction and the scattering principle of light in the leaded light site of the bottom of LGP 3, in the time that 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, realize the uniformity of LGP output intensity by this distribution.There is submicron grating diffusion structure in the front of LGP, and this diffusion structure makes to penetrate the light of LGP can be perpendicular to LGP outgoing, makes 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 this utility model lamp box, free from glare, flicker free, and thickness can greatly reduce.
The foregoing is only preferred embodiment of the present utility model, be not limited to this utility model, for a person skilled in the art, this utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
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 or 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 |
|---|---|---|---|
| CN201320705923.8U CN203647322U (en) | 2013-11-11 | 2013-11-11 | Visual testing chart lamp box with submicrostructural light guide plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320705923.8U CN203647322U (en) | 2013-11-11 | 2013-11-11 | Visual testing chart lamp box with submicrostructural light guide plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203647322U true CN203647322U (en) | 2014-06-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320705923.8U Expired - Fee Related CN203647322U (en) | 2013-11-11 | 2013-11-11 | Visual testing chart lamp box with submicrostructural light guide plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203647322U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103565396A (en) * | 2013-11-11 | 2014-02-12 | 苏州卫生职业技术学院 | Visual chart light box with light guide plate of submicrometer structure |
| CN107928619A (en) * | 2017-11-20 | 2018-04-20 | 王文月 | A kind of portable multi-function eyesight detects lamp box |
| CN114008384A (en) * | 2019-06-19 | 2022-02-01 | 康宁股份有限公司 | Integrated light guide plate and lighting apparatus having the same |
-
2013
- 2013-11-11 CN CN201320705923.8U patent/CN203647322U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103565396A (en) * | 2013-11-11 | 2014-02-12 | 苏州卫生职业技术学院 | Visual chart light box with light guide plate of submicrometer structure |
| CN107928619A (en) * | 2017-11-20 | 2018-04-20 | 王文月 | A kind of portable multi-function eyesight detects lamp box |
| CN107928619B (en) * | 2017-11-20 | 2020-11-24 | 六安木子可科技有限公司 | Portable multi-functional visual detection lamp house |
| CN114008384A (en) * | 2019-06-19 | 2022-02-01 | 康宁股份有限公司 | Integrated light guide plate and lighting apparatus having the same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140618 Termination date: 20151111 |
|
| EXPY | Termination of patent right or utility model |