CN102913852A - Optical lens for forming square light shape - Google Patents
Optical lens for forming square light shape Download PDFInfo
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- CN102913852A CN102913852A CN2012104128429A CN201210412842A CN102913852A CN 102913852 A CN102913852 A CN 102913852A CN 2012104128429 A CN2012104128429 A CN 2012104128429A CN 201210412842 A CN201210412842 A CN 201210412842A CN 102913852 A CN102913852 A CN 102913852A
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Abstract
The invention discloses an optical lens for forming a square light shape. The optical lens comprises a lens body, wherein the top of the lens body is provided with a light emitting surface, and the bottom of the lens body is provided with a light incident surface; a containing space is concavely formed in the center of the incident surface and is used for containing a luminous source; an edge line of the light incident surface is wound in a sealed mode and is in a slightly square geometric figure shape; the corners of the square geometric figure are arranged in an arc shape; and light emitted from the luminous source projects to a target projection surface through the lens body and presents a square light shape. Therefore, the optical lens is suitable for a backlight module, so that the backlight module has uniform illuminating brightness of the whole screen by means of the square light shape of a plurality of forms which are arranged adjacent to each other.
Description
Technical field
The present invention relates to the technical field of optical lens, be particularly related to the optical lens about the square light shape of a kind of formation, to utilize the secondary optics principle to adjust the lighting angle of former light emitting source, photometric distribution and Illumination Distribution, make it to present the illuminating effect of uniform light intensity.
Background technology
Because liquid crystal display is a kind of passive type display unit that does not have self light emission function, therefore need install backlight module additional to provide display floater required display light source, so, the area source of backlight module generation whether enough the and even brightness of tool namely directly affect the display quality of liquid crystal display.At present, backlight module can be divided into two kinds of side-light type and straight-down negatives (Direct Type Backlight) according to its structure, wherein, direct type backlight module is because having the high illumination uniformity, good bright dipping visual angle, high-light-energy utilization rate, easy package assembly, but and rapid fine adjustment picture area light and shade be widely used in the large scale liquid crystal display significantly to promote the characteristics such as dynamic contrast.
And LED has that luminous efficiency is high, the life-span is long and the characteristic such as power consumption is low and to become the using light source of backlight module first-selected.Know that now the mode that direct type backlight module system arranges through matrix is installed in a plurality of led light sources and a plurality of optical lens on one substrate, and suitable to a diffuser plate (Diffusion Plate) is covered on these emergent light surface of optical lens with one, be provided with the respectively light emitted optical path of this led light source of Uniform Dispersion, namely be projected to behind the mixed light on the display floater and provide brightness even area source.Yet, as shown in Figure 1, be the shape of projection light schematic diagram of known direct type backlight module on diffuser plate, respectively this led light source is behind this optical lens, form a circular light shape 1 on this diffuser plate, these circular light shapes 1 of mat distribution consist of the illumination range of backlight module demand.Yet the adjoiner that these circular light shapes are 1 is formed with the highlights 10 that mutually occurs simultaneously the field of illumination and without the dark section 11 of field of illumination, so, interlaced highlights 10 and dark section 11 will affect the light evenness of backlight module and reduce light mixing effect.Moreover, will affect the GTG level of contiguous picture area during bright dark areas in the liquid crystal display changing pictures and cause little fuzzy (Blooming) phenomenon, reduce definition and the degree of saturation of picture image.
Therefore, utilize optical lens to change the circular light shape of former led light source, but to form the square light shape of close proximity arrangement, to improve the illumination uniformity and the light mixing effect of application apparatus, be the present invention's purpose.Simultaneously, the necessary person of the rectangular light of utilization type is arranged for other illumination association area, also can be applicable for it in conjunction with the present invention, and light area and practical range efficient are significantly promoted.
Summary of the invention
Because the problem of prior art, the present invention's purpose is to provide the optical lens of the square light shape of a kind of formation, make the demander that adapts in the backlight that is used for liquid crystal display or adapt to rectangular light type environment in lighting field, to improve the universe intensity of illumination of range of exposures.
According to purpose of the present invention, this optical lens that forms square light shape has a lens body, and the top of this lens body is provided with an exiting surface, the bottom is provided with an incidence surface, the center of this incidence surface is arranged with and forms an accommodation space again, be provided with an accommodating light emitting source, it is characterized in that: one of this incidence surface edge line sealing around and slightly be a square geometric figure, and corner that should the square geometric figure is circular-arc setting, the emitted light of this light emitting source is projected to a target projection surface and presents a square light shape after this lens body.
Wherein, this target projection surface one of is arranged in the backlight module on the diffuser plate, and this optical lens more comprises at least one engaging body, and this engaging body is located at the bottom of this lens body, is provided with mutually being fixed with respect to a LED substrate.And the centre of this exiting surface is to form a concave point to lower recess, is projected to illumination spoke degree on this target projection surface with even this light emitting source.
For guaranteeing the square shape of light shape, this incidence surface is projected to the relative position at this exiting surface place, and the dispersion angle at this exiting surface place of the edge correspondence of this square geometric figure is more than or equal to this exiting surface place dispersion angle of the non-edge correspondence of this square geometric figure.So, when this optical lens is applied to this backlight module and is plural number when using kenel, can form the square light shape of arrangements of joining by these optical lenses of mat, all spend with the full frame light that promotes this backlight module, and then promote the light mixing effect of application liquid crystal device.In lighting field, also can satisfy must be with the environmental requirement of rectangular light type realization in addition.
Description of drawings
Fig. 1 is the shape of projection light schematic diagram of known direct type backlight module on diffuser plate.
Fig. 2 is the schematic diagram of preferred embodiment of the present invention.
Fig. 3 is the top view of preferred embodiment of the present invention.
Fig. 4 is the cutaway view of preferred embodiment of the present invention.
Fig. 5 is the optical track figure of preferred embodiment of the present invention.
Fig. 6 is one of preferred embodiment of the present invention distribution curve flux figure.
Fig. 7 is another distribution curve flux figure of preferred embodiment of the present invention.
Fig. 8 is the irradiation level figure of preferred embodiment of the present invention.
Fig. 9 is the use schematic diagram of preferred embodiment of the present invention when being applied to backlight module.
Figure 10 is preferred embodiment of the present invention the shape of projection light schematic diagram on diffuser plate when being applied to backlight module.
The specific embodiment
See also Fig. 2～5, it is respectively schematic diagram, top view, cutaway view and the optical track figure of preferred embodiment of the present invention.As shown in the figure, this optical lens 2 that forms square light shape has a lens body 20 and three engaging bodies 21, and the top of this lens body 20 is provided with an exiting surface 200, and its bottom then is provided with an incidence surface 201 and these engaging bodies 21.The center of this incidence surface 201 is arranged with and forms an accommodation space, and this accommodation space is provided with an accommodating light emitting source 3 like coniform space structure and wide top, bottom is narrower.These engaging bodies 21 are provided with mutually being fixed with respect to a LED substrate 4, and this accommodation space of mode winding that can adopt equidistant arrangement makes the applicability that promotes this optical lens 2 so that stable support force to be provided.Again, the sealing of one of this incidence surface 201 edge line centers on and slightly is a square geometric figure, and the corner of this square geometric figure is circular-arc setting, makes this lens body 20 slightly be cube structure.So, these light emitting source 3 emitted light are projected to a target projection surface through this lens body 20, can obtain such as Fig. 6～8, it is respectively one of preferred embodiment of the present invention distribution curve flux figure, another distribution curve flux figure and irradiation level figure, institute presents the lighting effect of a square light shape, and with one of 45～225 ° of lighting angles first axle I
1Depending on it, the relative two periphery places of this square light shape approximately are 75% relative intensity (Relatively Intensity), and with one of 0～180 ° of lighting angle the second axis I
2Depending on it, relative two edges of this square light shape approximately are 100% relative intensity.
In other words, this target projection surface can be the relative position that this incidence surface 201 is projected to these exiting surface 200 places, and, the dispersion angle at these exiting surface 200 places of the edge correspondence of this square geometric figure is more than or equal to these exiting surface 200 place's dispersion angles of the non-edge correspondence of this square geometric figure, be square really to keep light shape, the periphery place that avoids because of this square geometric figure is had than high dispersion angle cause the light deformation, such as circular light shape.And, be projected to the illumination uniformity on this target projection surface for promoting this light emitting source 3, the centre of this exiting surface 200 forms a concave point to lower recess, so that this concave point that has than the sharp end angle further reflects the light that this light emitting source 3 is projected to these exiting surface 200 central parts, redistribute the photometric distribution of this light emitting source 3 with the adjustment member opticpath.
See also Fig. 9,10, its be respectively preferred embodiment of the present invention when being applied to backlight module the use schematic diagram and the shape of projection light schematic diagram on diffuser plate.As shown in the figure, this optical lens 2 is applicable in the bottom-lighting type back light module 5, and this backlight module 5 is provided with providing lighting source to give a display module (not shown) for liquid crystal display.This backlight module 5 has these optical lenses 2 of a substrate 50, a plurality of led light source 51, a diffuser plate 52 and corresponding these led light source 51 settings, after 51 one-tenth matrix forms of these led light sources are arranged and are placed on this substrate 50, and these optical lenses 2 are fixedly arranged on this substrate 50 to be these cylindric engaging bodies 21, and these led light sources 51 are placed on respectively in these accommodation spaces.Again, this diffuser plate 52 covers in these optical lenses 2 with a suitable distance, is sent to this display module in order to disperse these led light sources 51 behind the light that these optical lenses 2 are launched.So, see through these optical lenses 2 and carry out refraction and the reflection of secondary optics, the light that these led light sources 51 are throwed will be in this diffuser plate 52, and namely being formed separately on this target projection surface is a square light shape 520.
Because these square light shapes 520 have respectively the periphery of formed objects, therefore can on this diffuser plate 52, form the mutually closely setting that distributes of adjacency.In other words, respectively should square light shape 520 junctions will be without the generation of bright dark place difference, so that this backlight module 5 presents full frame even briliancy, improve by this picture color saturation degree and the clear sunrise degree of liquid crystal display, and then satisfy the demand of consumer in the video signal amusement.
The above only is the preferred embodiment of illustrative, but not is restricted person.Any spirit and category that does not break away from the present invention, and to its equivalent modifications of carrying out or change, all should be contained in the rear attached claim.
Claims (5)
1. optical lens that forms square light shape, it is characterized in that: it comprises a lens body, and the top of this lens body is provided with an exiting surface, the bottom is provided with an incidence surface, the center of this incidence surface is arranged with and forms an accommodation space again, be provided with an accommodating light emitting source, one of this incidence surface edge line be sealing around and slightly be a square geometric figure, and corner that should the square geometric figure is circular-arc setting, the emitted light of this light emitting source is projected to a target projection surface and presents a square light shape after this lens body.
2. the optical lens of the square light shape of formation according to claim 1, it is characterized in that: described incidence surface is projected to the relative position at this exiting surface place, and the dispersion angle at this exiting surface place of the edge correspondence of this square geometric figure is more than or equal to this exiting surface place dispersion angle of the non-edge correspondence of this square geometric figure.
3. the optical lens of the square light shape of formation according to claim 1, it is characterized in that: the centre of described exiting surface forms a concave point to lower recess.
4. the optical lens of the square light shape of described formation according to claim 1-3 is characterized in that: described target projection surface one of is arranged in the backlight module on the diffuser plate.
5. the optical lens of the square light shape of formation according to claim 1, it is characterized in that: more comprise at least one engaging body, this engaging body is located at the bottom of this lens body, is provided with mutually being fixed with respect to a LED substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104128429A CN102913852A (en) | 2012-10-26 | 2012-10-26 | Optical lens for forming square light shape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104128429A CN102913852A (en) | 2012-10-26 | 2012-10-26 | Optical lens for forming square light shape |
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| Publication Number | Publication Date |
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| CN102913852A true CN102913852A (en) | 2013-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012104128429A Pending CN102913852A (en) | 2012-10-26 | 2012-10-26 | Optical lens for forming square light shape |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832798A (en) * | 2014-02-10 | 2015-08-12 | 欧司朗有限公司 | Led illumination apparatus |
| CN107191893A (en) * | 2017-07-24 | 2017-09-22 | 深圳市华星光电技术有限公司 | A kind of LED/light source lens and display panel |
| CN107247362A (en) * | 2017-06-19 | 2017-10-13 | 深圳市华星光电技术有限公司 | Quantum dot optical module, quantum dot lens and its manufacture method |
| CN109578855A (en) * | 2017-09-28 | 2019-04-05 | 周聪明 | LED light source guiding device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101178515A (en) * | 2007-12-10 | 2008-05-14 | 清华大学 | Straight down active mode dynamic state back light source structure based on luminous diode |
| TW201122360A (en) * | 2009-12-25 | 2011-07-01 | Chi Lin Technology Co Ltd | Light source device and backlight module including the light source device |
| CN102230600A (en) * | 2009-10-22 | 2011-11-02 | 富士迈半导体精密工业（上海）有限公司 | Optical lens for forming square light field |
-
2012
- 2012-10-26 CN CN2012104128429A patent/CN102913852A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101178515A (en) * | 2007-12-10 | 2008-05-14 | 清华大学 | Straight down active mode dynamic state back light source structure based on luminous diode |
| CN102230600A (en) * | 2009-10-22 | 2011-11-02 | 富士迈半导体精密工业（上海）有限公司 | Optical lens for forming square light field |
| TW201122360A (en) * | 2009-12-25 | 2011-07-01 | Chi Lin Technology Co Ltd | Light source device and backlight module including the light source device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832798A (en) * | 2014-02-10 | 2015-08-12 | 欧司朗有限公司 | Led illumination apparatus |
| CN107247362A (en) * | 2017-06-19 | 2017-10-13 | 深圳市华星光电技术有限公司 | Quantum dot optical module, quantum dot lens and its manufacture method |
| CN107191893A (en) * | 2017-07-24 | 2017-09-22 | 深圳市华星光电技术有限公司 | A kind of LED/light source lens and display panel |
| CN109578855A (en) * | 2017-09-28 | 2019-04-05 | 周聪明 | LED light source guiding device |
| CN109578855B (en) * | 2017-09-28 | 2021-11-16 | 周聪明 | LED light source guiding device |
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Application publication date: 20130206 |