CN101793377A - LED with deformable lens - Google Patents

Abstract

A light emitting diode with a deformable lens, comprising: a base; at least one semiconductor light emitting element disposed on the base; and at least one anamorphic lens for guiding out the light beam emitted by the semiconductor light-emitting element and regulating the shape of the light beam emitted by the semiconductor light-emitting element. The anamorphic lens provides a zooming function, can be controlled to deform, and is deformed into different lens shapes such as a convex lens, a plane lens, a concave lens or an irregular lens, and the like, so as to adjust the shape of the light beam emitted by the semiconductor light-emitting element and emit different light signals.

Description

LED with deformable lens

technical field

The invention relates to a light-emitting diode structure, in particular to a light-emitting diode with a deformable lens, which has concave, convex, plane or irregular-shaped lenses and can be used to regulate the state of light beams emitted by the light-emitting diode.

Background technique

Light Emitting Doide (LED) is a solid-state light-emitting element made of semiconductor materials. The materials use III-V chemical elements (such as: gallium phosphide (GaP), gallium arsenide (GaAs), etc. Electric energy is converted into light, that is, a current is applied to the compound semiconductor. Through the combination of electrons and holes, the excess energy will be released in the form of light to achieve the effect of light emission. It belongs to cold light emission and has a life span of more than 100,000 hours.

The biggest features of LED are: no need for idling time, fast response (about 10-9 seconds), small size, low power consumption, shock resistance, low pollution, suitable for mass production, high reliability, easy to cooperate The application needs to make extremely small or array light-emitting elements.

Due to the different materials of LEDs, the energy levels occupied by electrons and holes in the diodes are also different. The difference in energy levels affects the energy of the combined photons to produce light of different wavelengths, that is, light of different colors, such as red, Orange light, yellow, green, blue or invisible light, etc.

Although the LED has the aforementioned advantages, its luminous beam is limited by the existing final resin packaging, so that the state of the luminous beam is limited by the packaging structure, and it is impossible to adjust the required beam state according to the current demand.

Contents of the invention

Therefore, in order to solve the above-mentioned deficiency, the object of the present invention is to provide a light-emitting diode with a deformable lens. The deformable lens not only provides the function of zooming, but also can be deformed into a convex lens, a plane lens, a concave lens or an irregular-shaped lens. , so that the state of the light beam emitted by the light-emitting element can be adjusted without being limited by the packaging structure.

To achieve the above-mentioned purpose, the present invention proposes a light-emitting diode with a deformable lens, which includes: a base; at least one semiconductor light-emitting element disposed on the base; and at least one lens for emitting light from the semiconductor The light beam emitted by the element is exported, and the shape of the light beam emitted by the semiconductor light emitting element is regulated.

Wherein the aforementioned lens includes: a droplet formed by one of water, liquid crystal, light-permeable macromolecule material and dielectric material. And a first electrode plate and a second electrode plate are correspondingly clamped in parallel to the liquid bead, so that the liquid bead is respectively in contact with the surface of the first electrode plate and a second electrode plate to form a lens; the first electrode plate and the second electrode plate Each of the two electrode plates contains a first electrode group and a second electrode group, and the first electrode group and the second electrode group can be selectively applied with a bias voltage for the contact between the liquid bead and the first electrode group. The electrodes respectively form a first potential, and the liquid beads and the electrodes of the second electrode group respectively form a second potential; thus, by changing the first potential and the second potential on the first electrode plate and the second electrode plate Two potentials, the contact area between the droplet and the first electrode plate and the second electrode plate can be adjusted, and the droplet forms various lenses due to surface tension, which can be convex lens, flat lens, concave lens or irregular The shape lens can be used to adjust the shape of the light beam emitted by the semiconductor light emitting element.

The advantage of the present invention is that the semiconductor light-emitting element of the light-emitting diode of the present invention is provided with an anamorphic lens, and the anamorphic lens provides the function of zooming, and can be controlled to be deformed, and deformed into a convex lens, a plane lens, a concave lens or an irregularly shaped lens, etc. The shape of the lens can conveniently adjust the shape of the light beam emitted by the semiconductor light-emitting element for sending out different light signals.

Description of drawings

Fig. 1 is the schematic diagram of the light beam of the semiconductor light-emitting element penetrating the convex lens;

Fig. 2 is the schematic diagram that the light beam of the semiconductor light-emitting element penetrates the plane lens;

3 is a schematic diagram of a light beam of a semiconductor light-emitting element penetrating a concave lens;

Fig. 4 is the schematic diagram that the light beam of semiconductor light-emitting element penetrates the irregular shape lens;

5 is a schematic diagram of a single semiconductor light emitting element and multiple lenses;

6 is a schematic diagram of a plurality of semiconductor light emitting elements and a plurality of lenses;

FIG. 7 is a schematic diagram of a plurality of semiconductor light emitting elements and a single lens.

Detailed ways

The detailed content and technical description of the present invention will be further described with examples, but it should be understood that the examples are only for illustrative purposes and should not be construed as limitations on the implementation of the present invention.

Please refer to FIG. 1 to FIG. 4 , which are schematic diagrams of the implementation of the light emitting diode with deformable lens of the present invention. In the light emitting diode with deformable lens of the present invention, in practice, the light emitting diode includes a base 200, and a semiconductor light emitting element 210 is arranged on the base 200 to form a basic light emitting structure of a light emitting diode, and the semiconductor light emitting element 210 is placed on On the base 200, and packaged by die bonding and wire bonding, since this is a technology well known to those skilled in the art, it will not be described in detail. Then, an anamorphic lens 100 is arranged in front of the semiconductor light emitting element 210 to form a light emitting diode with the anamorphic lens 100 .

The method of using the droplet as a lens lens is to use the electrowetting effect (electrowetting, EW) to control the shape and curvature of the droplet, thereby changing the focal length (focal length) of the droplet. The anamorphic lens 100 of the present invention includes: a liquid bead 130, which is formed by one of water, liquid crystal, light-permeable macromolecule (macromolecule) material and liquid dielectric material, as long as the liquid bead 130 can Light-transmitting dielectric materials (such as electronic grade castor oil) can be used in the structure of the anamorphic lens 100; The liquid beads 130 respectively contact the surfaces of the first electrode plate 110 and a second electrode plate 120 to form the anamorphic lens 100 . Wherein, the first electrode plate 110 and the second electrode plate 120 respectively include a first electrode group 111 and a second electrode group 121, and the first electrode group 111 and the second electrode group 121 can be biased selectively. pressure (bias), used to respectively form a first potential between the liquid bead 130 and the electrodes of the first electrode group 111, and respectively form a first potential between the liquid bead 130 and the electrodes of the second electrode group 121. second potential.

When the potential between the electrode groups 111 and 121 and the interface of the liquid bead 130 changes, the surface tension of the liquid bead 130 will also change and cause the liquid to move, and this operation is reversible. Wetting phenomenon" (electrowetting, EW). Subsequent related studies have found that if multiple microns of insulating film are laid on the metal surface to which the potential is applied, the reliability of the operation can be effectively improved, and the electrode damage and sample deterioration caused by electrolysis can be avoided. This improvement This type of technology is called "electrowetting of insulating layer" (electrowetting-on-dielectric, EWOD). Changing the potential of the surface controls the movement of the liquid on the solid, and the droplets tend to move toward electrodes of higher potential. The electrodes are like magnets with suction, and the higher the applied potential, the stronger the suction, which can attract the liquid beads 130 more effectively.

Based on this principle, by changing the first potential and the second potential on the liquid bead 130 and the first electrode plate 110 and the second electrode plate 120, the liquid bead 130 and the first electrode plate 110 and the second electrode plate 110 can be adjusted. The contact area of the electrode plate 120 can also adjust the curvature of the liquid bead 130 due to the surface tension of the liquid bead 130, that is, the focal length of the lens 110 can be adjusted by controlling the first electrode plate 110 and the second electrode plate 120. The distribution of the first potential and the second potential can be adjusted, and the curvature of the droplet 130 can also be changed to form various lens shapes, such as convex lens shape (as shown in Figure 1 ), plane lens shape (as shown in Figure 2 ), concave lens (as shown in FIG. 3 ) or irregular shape lens (as shown in FIG. 4 , a kind of contact area between the top of the liquid bead 130 and the second electrode plate 120 is large, and the bottom of the liquid bead 130 and the first electrode plate 110 is one of the class inverted trapezoidal lens with less junction area).

Therefore, through the adjustable focal length and deformation of the anamorphic lens 100, the state of the light beam emitted by the semiconductor light emitting element 210 can be adjusted. The light beam is focused (as shown in Figure 1); when the liquid bead 130 of the anamorphic lens 100 forms a plane lens shape, the light beam emitted by the semiconductor light emitting element 210 can pass through as parallel light (as shown in Figure 2); when the When the liquid bead 130 of the anamorphic lens 100 forms a concave lens shape, the light beam emitted by the semiconductor light emitting element 210 can be diverged (as shown in Figure 3); when the liquid bead 130 of the anamorphic lens 100 forms an irregular lens, the semiconductor Half of the light beam emitted by the light emitting element 210 diverges and half passes parallel light (as shown in FIG. 4 ). Therefore, by controlling the distribution of the first potential and the second potential on the first electrode plate 110 and the second electrode plate 120 on the lens 110, the focal length of the lens 110 can be adjusted, or the curvature of the droplet 130 can be changed to form various lens shapes , the light beams emitted by the semiconductor light emitting element 210 can be adjusted to form light signals with different light beam states.

Again, because the anamorphic lens 100 of the present invention clamps the liquid bead 130 by the two electrode plates 110 and 120 to form a lens, so the light will not have a bottom plate or an electrode portion on the path of the penetrating liquid bead 130, so that the light will pass through High transmittance, reducing the loss of light penetration.

In further implementation, as shown in Figure 5, the base 200 of the present invention may have a single semiconductor light emitting element 210, but a plurality of anamorphic lenses 100 may be arranged in front of it, wherein these anamorphic lenses 100 may be arranged in a matrix, through Control the curvature and lens shape of the droplet 130 of each anamorphic lens 100 to form a convex lens, a flat lens, a concave lens or an irregular lens, and form a light beam regulation mode by controlling multiple anamorphic lenses 100 .

As shown in FIG. 6 , the base 200 of the present invention also has a plurality of semiconductor light emitting elements 210, which are arranged corresponding to the multiple anamorphic lenses 100 in front, wherein these semiconductor light emitting elements 210 and the anamorphic lenses 100 can be arranged in a matrix, By controlling whether these semiconductor light-emitting elements 210 emit light or not, and controlling the curvature and lens shape of the droplet 130 of each anamorphic lens 100, a lens with a convex lens shape, a flat lens shape, a concave lens shape or an irregular shape can be formed to form a flexible lens. A light beam regulation mode by controlling the semiconductor light emitting element 210 and a plurality of anamorphic lenses 100 .

As shown in Figure 7, of course, it is also possible to have multiple semiconductor light emitting elements 210 on the base 200 of the present invention, wherein these semiconductor light emitting elements 210 can be arranged in a matrix, but a single anamorphic lens 100 is arranged in front of it, and by controlling these Whether the semiconductor light-emitting element 210 emits light or not, and controls the curvature and lens shape of the liquid bead 130 of the anamorphic lens 100 to form a convex lens shape, a plane lens shape, a concave lens shape or an irregular shape lens, and form a semiconductor light-emitting element that can be controlled. 210 and a single anamorphic lens 100 in a beam control mode.

The above description of the present invention is illustrative rather than restrictive. Those skilled in the art understand that many modifications, changes or equivalents can be made to it within the spirit and scope of the claims, but they will all fall into within the protection scope of the present invention.

Claims (4)

1. the light emitting diode of a tool deformable lens is characterized in that, comprising:

One pedestal;

At least one semiconductor light-emitting elements is arranged on this pedestal; And

At least one anamorphote, the light beam that is used for this semiconductor light-emitting elements is sent is derived, and regulates and control the beam shape that this semiconductor light-emitting elements sends.

2. have the light emitting diode of deformable lens according to claim 1, it is characterized in that above-mentioned anamorphote comprises: a liquid pearl; And

One first battery lead plate and one second battery lead plate, corresponding parallel this liquid pearl that inserts and puts with this second battery lead plate of this first battery lead plate contacts this liquid pearl respectively and forms lens with this second electrode plate surface with this first battery lead plate; Respectively comprise one first electrode group and one second electrode group in this first battery lead plate and this second battery lead plate, this first electrode group and this second electrode group can optionally be applied bias voltage, in order between each electrode of this liquid pearl and this first electrode group, to form one first current potential respectively, reach and between each electrode of this liquid pearl and this second electrode group, form one second current potential respectively;

Thus, by changing this first current potential and this second current potential on this first battery lead plate and this second battery lead plate, can adjust this liquid pearl and this first battery lead plate and with the contact area of this second battery lead plate, and this liquid pearl forms lens because of surface tension.

3. as the light emitting diode of tool deformable lens as described in the claim 2, it is characterized in that one of them is formed this liquid pearl by the macromolecular material of water, liquid crystal, light-permeable and dielectric material.

4. as the light emitting diode of tool deformable lens as described in the claim 2, it is characterized in that it is wherein a kind of that this liquid pearl forms lens-shaped, planar lens shape, concavees lens shape and irregularly shaped lens because of the surface tension of itself.

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