CN201331593Y

CN201331593Y - Symmetrical type liquid lens array

Info

Publication number: CN201331593Y
Application number: CNU2009200387964U
Authority: CN
Inventors: 夏军; 雷威; 张宇宁
Original assignee: Southeast University
Current assignee: Southeast University
Priority date: 2009-01-09
Filing date: 2009-01-09
Publication date: 2009-10-21
Anticipated expiration: 2019-01-09

Abstract

A symmetrical type liquid lens array is mainly composed of a first substrate (4), a second substrate (11), and oil and water enclosed between the substrates. The first substrate (4) is prepared with a first electrode (1), a first insulation layer (5) is covered on the first electrode (1), a first dredging layer (6) is covered on the first insulation layer (5), a first partition (2) is on the first dredging layer (6), a first nonpolarity oil (3) is contained in a mesh of the first partition (2), the structure on the second substrate (11) is similar to the structure on the first substrate (4), an electrolyte water (15) is closed between the first substrate (4) and the second substrate (11), the electrolyte water (15) is sealed by a seal partition (7). The liquid lens array operates under the two-dimensional display mode, or the three-dimensional display mode adjusted by the focal distance dynamically, or the same screen display mode of the two-dimensional image content and the three-dimensional image content.

Description

The symmetrical expression liquid lens array

Technical field

The utility model relates to a kind of liquid lens array, especially relates to a kind of liquid lens array with two symmetrical single-spherical lens.

Background technology

Apply for a patent disclose in 200710133932.3,200810018937.6,200810024528.7,200710022982.4,200810100750.0,200810100754.9 multiple based on the wetting liquid lens array of electricity, the aforesaid liquid lens arra has ultra-thin, flexible, realize the characteristics that 3 D stereo shows.Each liquid lens unit is made up of oil and water in the lens arra, and impressed voltage can be regulated the radius-of-curvature of oil and water engaging surface, thereby realizes the variation of liquid lens focal length.But the aforesaid liquid lens unit includes only one deck oil and water, promptly has only a single spherical mirror, and in order to realize short focal length, single sphere that oil and water engaging surface are formed has less radius, and less radius then can produce bigger aberration.

In order to solve the contradiction of above-mentioned focal range and aberration, the utility model provides a kind of liquid lens array, and it has less aberration when realizing shorter focal length.

Summary of the invention

Technical matters: in order to overcome the contradiction of liquid lens array focal range and aberration, the utility model provides a kind of symmetrical expression liquid lens array, each liquid lens unit in this liquid lens array is made up of two coaxial single-spherical lens, the focal length of each single-spherical lens can be adjusted separately, the whole diopter of lens unit be two single-spherical lens and, thereby under two single-spherical lens have condition than larger radius of curvature and small aberration respectively, realize bigger diopter.

Technical scheme: the structure of symmetrical expression liquid lens array of the present utility model is: this liquid lens array is divided into the first half and the latter half, wherein preparation has first electrode on first substrate of the first half, be coated with first insulation course on first electrode, be coated with first hydrophobic layer on first insulation course, be first partition on first hydrophobic layer, cut off in the mesh that forms first and include first non-polar oil; In the latter half, preparation has third electrode on second substrate, is coated with second insulation course on the third electrode, is coated with second hydrophobic layer on second insulation course, is second partition on second hydrophobic layer, cuts off in the mesh that forms second and includes second non-polar oil; Between described the first half and the latter half, be closed with electrolyte water, sealing partition, second electrode, electrolyte water is sealed by the sealing partition, the electrolyte water and second electrode conduction, voltage difference between first electrode and second electrode is adjusted the radius-of-curvature of the electrolyte water and the first non-polar oil surface of contact, and the voltage difference between the third electrode and second electrode is adjusted the radius-of-curvature of the electrolyte water and the second non-polar oil surface of contact.

It is the circular hole of ranks matrix form arrangement, the circular hole that product word shape is arranged, symmetrical hexagon or the polygon that product word shape is arranged that first partition and second cuts off.

It is whole conductive layer that first partition and second cuts off, and the surface coats a layer insulating.

The shape of first electrode and third electrode is the circular hole of ranks matrix form arrangement, the circular hole that product word shape is arranged, symmetrical hexagon or the polygon that product word shape is arranged.

The shape of first electrode and third electrode is circular, and each circular ring electrode is controlled voltage separately by thin film transistor (TFT) array.

Liquid lens array is operated in two dimensional mode, the dynamic 3-D display pattern of adjusting of focal length or the same screen display mode of two dimensional image content and 3-D view content.

Researchist in this area can form multiple different liquid lens focal length array mode as required, and the liquid lens array that also can utilize this problem to propose is realized other stereo display mode, for example binocular parallax stereo display of class prismoid prism.

Beneficial effect: the utility model provides a kind of symmetrical expression liquid lens array, the focal length of two single-spherical lens can be adjusted respectively, thereby realizes the bigger dioptric while having less aberration, the front-back baseboard structural symmetry of liquid lens array, preparation technology is simple.

Description of drawings

Fig. 1. symmetrical expression liquid lens array structural representation.

Fig. 2 .ab diagrammatic cross-section.

Fig. 3 .cd diagrammatic cross-section.

Have among the above figure: first electrode 1, first cuts off 2, first non-polar oil 3, first substrate 4, first insulation course 5, first hydrophobic layer 6, sealing partition 7, second electrode 8, second hydrophobic layer 9, second insulation course 10, second substrate 11, third electrode 12, second partition, 13, second non-polar oil 14, electrolyte water 15, thin film transistor (TFT) array 16, column electrode R _n～R _N+3, row electrode C _m～C _M+3

Embodiment

It shown in Fig. 1 the preferred symmetrical expression liquid lens array of the present invention structural representation.It is mainly by first substrate 4 and second substrate 11, and oil that seals between aforesaid substrate and water composition.First substrate 4 is a transparency carrier, can be glass or transparent resin material, also thin polymer film, for example Kapton, or PET film etc.; First electrode, 1, the first electrode 1 is arranged can be by ITO or be doped with the transparency conductive electrode that the zinc paste of metal (for example aluminium) constitutes in preparation on first substrate 4, also can be one deck conductive metal film, for example the conductive film of metal such as aluminium or copper preparation; Being coated with first insulation course 5 on first electrode 1, can be the insulation film of inorganic material preparations such as strontium carbonate barium, aluminium oxide, monox, silicon nitride, also can be the insulation film of polymer manufacture such as polyimide, parylene, teflon; Being coated with first hydrophobic layer 6 on first insulation course 5, can be the hydrophobic layer of material preparations such as Teflon AF or AGC Cytop.Be that first partition, 2, the first partitions 2 can adopt the water wetted material preparation on first hydrophobic layer 6, for example adopt photoresist to be prepared, or stick on first hydrophobic layer 6 after adopting other film to be etched into pattern, for example Kapton by exposure and development; First partition 2 is a reticulate texture, includes first non-polar oil 3 in its mesh, can be mineral oil such as silicone oil; Second substrate 11 and to go up preparation and first substrate 4 of structure similar, second substrate 11 is a transparency carrier, can be glass or transparent resin material, also but thin polymer film, for example Kapton, or PET film etc.; Third electrode 12, third electrode 12 are arranged can be by ITO or be doped with the transparency conductive electrode that the zinc paste of metal (for example aluminium) constitutes in preparation on second substrate 11, also can be one deck conductive metal film, for example the conductive film of metal such as aluminium or copper preparation; Being coated with second insulation course 10 on the third electrode 12, can be the insulation film of inorganic material preparations such as strontium carbonate barium, aluminium oxide, monox, silicon nitride, also can be the insulation film of polymer manufacture such as polyimide, parylene, teflon; Being coated with second hydrophobic layer 9 on second insulation course 10, can be the hydrophobic layer of material preparations such as Teflon AF or AGC Cytop.It on second hydrophobic layer 9 second partition 13, second cuts off 13 can adopt the water wetted material preparation, for example adopt photoresist to be prepared, or stick on second hydrophobic layer 9 after adopting other film to be etched into pattern, for example Kapton by exposure and development;

Second partition 13 is a reticulate texture, includes second non-polar oil 14 in its mesh, can be mineral oil such as silicone oil; Be closed with electrolyte water 15 between first substrate 4 and second substrate 11, electrolyte water 15 can be the deionized water that comprises inorganic salts such as potassium chloride, sodium chloride; Electrolyte water 15 cuts off 7 by sealing all around and seals, it can be materials such as epoxy resin, PET, polyimide that sealing cuts off 7, and it can be conductive metal layer that its surface coats second electrode, 8, the second electrodes 8, for example metallic aluminium, copper, gold etc., or transparency conductive electrode ITO etc.;

Second electrode

8 and 15 conductings of electrolyte water; It can also be an integral body that sealing cuts off 7 and second electrode 8, is conducting metal, for example aluminium, copper etc.

Shown in Figure 2 is the synoptic diagram of ab section among Fig. 1.Cut off 7 for sealing around among the figure, sealing cuts off 7 and coats second electrode 8, it is the reticulated cell structures that first partition 2 forms that sealing cuts off in 7, reticulated cell can be the circular hole that illustrated ranks matrix form is arranged, can also be the circular hole that product word shape is arranged, can also be symmetrical hexagon or polygon that product word shape is arranged; First partition 2 can also be the conductive layer of an integral body, for example surface of polymer material such as metal otter board or polyimide is coated with conductive layer (for example metallic copper or aluminium), outside the conductive layer of integral body, also need add a layer insulating again, adding insulation course can be the insulation film of inorganic material preparations such as strontium carbonate barium, aluminium oxide, monox, silicon nitride, it also can be the insulation film of polymer manufacture such as polyimide, parylene, teflon, thereby make first to cut off electrode of 2 formation, still with the 15 not conductings of electrolyte water.Symmetrical with first partition 2, it is identical with illustrated first partition 2 that second on second substrate 11 cuts off the 13 reticulated cell structures that form.The shape of first electrode 1 and third electrode 12 is similar with the reticulated cell of diagram first partition 2, can be the circular hole that the ranks matrix form is arranged, and can also be the circular hole that product word shape is arranged, and can also be the symmetrical hexagon that product word shape is arranged.In addition, the shape of first electrode 1 and third electrode 12 can also be shown in Figure 3 circular.

Shown in Figure 3 is the synoptic diagram of cd section among Fig. 1.Second insulation course 10 is coating third electrode 12 among the figure, different with circular hole shown in Fig. 2, third electrode 12 is circular, the corresponding liquid lens unit of each annulus, not conducting mutually between the annulus, thereby can control the voltage of each annulus respectively by increasing thin film transistor (TFT) array 16 (tft array), the technologies such as a-Si, p-Si, low temperature polycrystalline silicon or conducting polymer that thin film transistor (TFT) array 16 can adopt present LCDs to adopt are made.The thin film transistor (TFT) of each liquid lens unit correspondence is by column electrode R _n～R _N+3With row electrode C _m～C _M+3Common addressing.

Liquid lens array shown in Fig. 1 is adjusted liquid lens on first substrate 4 and second substrate 11 respectively by the voltage of controlling first electrode 1, second electrode 8 and third electrode 12.Usually the volume of first non-polar oil 3 equals or is slightly larger than first to cut off the volume that circular hole comprised in 2 in each liquid lens unit, thereby when not having voltage difference between first electrode 1 and second electrode 8, the surface of contact of the electrolyte water 15 and first non-polar oil 3 is the plane.When having voltage difference between first electrode 1 and second electrode 8, because electric wetting action, first hydrophobic layer 6 along with the increase of voltage difference little by little by hydrophobic become hydrophilic, thereby make electrolyte water 15 change contact into by not contacting with first hydrophobic layer 6, when first electrode 1 is circular hole shown in Fig. 2, the surface of contact of the electrolyte water 15 and first hydrophobic layer 6 is similarly circular hole, thereby make the surface of contact of the immiscible electrolyte water 15 and first non-polar oil 3 form sphere, electrolyte water 15 is identical with the density of first non-polar oil 3, but optical index difference, thereby form a single-spherical lens, and voltage difference is big more, single spherical mirror focal length is short more.In addition, can also cut off on-load voltage on 2 first, promptly cutting off 2 this moment first is conductive layers of an integral body, by changing first voltage difference of cutting off between 2 and second electrode 8, can adjust the electrolyte water 15 and first contact angle that cuts off between 2, thereby regulate the focal length of the single-spherical lens that forms by the electrolyte water 15 and first non-polar oil 3 in a wider context.Similarly, electrolyte water 15 has identical principle of work with the single-spherical lens that second non-polar oil 14 forms on second substrate 11.

When first electrode 1 and third electrode 12 are circular ring structure shown in Fig. 3, first electrode 1 of each the single-spherical lens unit on first substrate 4 and second substrate 11 and the voltage on the third electrode 12 can be adjusted respectively, thereby realize the independent adjustment of each single-spherical lens on first substrate 4 and second substrate 11.

As shown in fig. 1, the central shaft of each single-spherical lens is overlapped on first substrate 4 and second substrate 11, thereby form a lens unit with two single-spherical lens, the whole diopter of lens unit be two single-spherical lens and, thereby under two single-spherical lens have condition than larger radius of curvature and small aberration respectively, realize bigger diopter.

Liquid lens array shown in Fig. 1 can be used for shooting end and the display end that image set becomes stereo display.When the surface of contact of electrolyte water 15 and first non-polar oil 3 and second non-polar oil 14 was adjusted into the plane, liquid lens array did not produce converging action to incident light, and this moment is similar with conventional clear glass, and promptly liquid lens array is operated in two dimensional mode.When the surface of contact of electrolyte water 15 and first non-polar oil 3 and second non-polar oil 14 is adjusted into curved surface, liquid lens array is operated in three-dimensional image set and becomes three-dimensional display mode, and can dynamically adjust the focal length of liquid lens according to content displayed, or control the focal length of each liquid lens unit respectively, thereby the same screen of realizing two dimensional image content and 3-D view content shows.

Claims

1. symmetrical expression liquid lens array, it is characterized in that: this liquid lens array is divided into the first half and the latter half, wherein first substrate (4) of the first half is gone up preparation first electrode (1), be coated with first insulation course (5) on first electrode (1), be coated with first hydrophobic layer (6) on first insulation course (5), be first partition (2) on first hydrophobic layer (6), in the mesh that first partition (2) forms, include first non-polar oil (3); In the latter half, second substrate (11) is gone up preparation third electrode (12), be coated with second insulation course (10) on the third electrode (12), be coated with second hydrophobic layer (9) on second insulation course (10), be second partition (13) on second hydrophobic layer (9), in the mesh that second partition (13) forms, include second non-polar oil (14); Between described the first half and the latter half, be closed with electrolyte water (15), sealing partition (7), second electrode (8), electrolyte water (15) cuts off (7) by sealing and seals, electrolyte water (15) and second electrode (8) conducting, voltage difference between first electrode (1) and second electrode (8) is adjusted the radius-of-curvature of electrolyte water (15) and first non-polar oil (3) surface of contact, and the voltage difference between third electrode (12) and second electrode (8) is adjusted the radius-of-curvature of electrolyte water (15) and second non-polar oil (14) surface of contact.

2. symmetrical expression liquid lens array according to claim 1 is characterized in that: first cuts off (2) and second cuts off the circular hole that (13) are the arrangements of ranks matrix form, the circular hole that product word shape is arranged, symmetrical hexagon or the polygon that product word shape is arranged.

3. symmetrical expression liquid lens array according to claim 1 is characterized in that: first cuts off (2) and second cuts off the conductive layer that (13) are integral body, and the surface coats a layer insulating.

4. symmetrical expression liquid lens array according to claim 1 is characterized in that: the shape of first electrode (1) and third electrode (12) is the circular hole of ranks matrix form arrangement, the circular hole that product word shape is arranged, symmetrical hexagon or the polygon that product word shape is arranged.

5. symmetrical expression liquid lens array according to claim 1 is characterized in that: the shape of first electrode (1) and third electrode (12) is circular, and each circular ring electrode is controlled voltage separately by thin film transistor (TFT) array (16).

6. symmetrical expression liquid lens array according to claim 1 is characterized in that: liquid lens array is operated in two dimensional mode, the dynamic 3-D display pattern of adjusting of focal length or the same screen display mode of two dimensional image content and 3-D view content.