KR20110094230A

KR20110094230A - Lightening module with variable emission angle

Info

Publication number: KR20110094230A
Application number: KR1020100013661A
Authority: KR
Inventors: 류인구
Original assignee: 유창산업기계(주)
Priority date: 2010-02-15
Filing date: 2010-02-15
Publication date: 2011-08-23

Abstract

The present invention relates to an illumination system, which is a variable radiation angle illumination system that can vary the radiation angle of the illumination system, can be used in conjunction with a camera having a zoom function, or can be used for general lighting. A camera having a zoom function photographs a subject by changing a camera's field of view according to a distance or a size of a subject. When shooting in a dark environment, a camera uses an auxiliary illumination system. In this case, when the illumination system of the present invention is used, the radiation angle of the illumination system is changed so as to be linked to the camera viewing angle according to the change of the zoom ratio. When the present invention is applied to a general illumination system, wide-angle illumination and narrow-angle illumination are possible, and the use efficiency of light is optimized as necessary to minimize power saving effect and damage to the surroundings.

Description

Lighting module with variable emission angle

Illumination system for cameras, LED illumination system

The present invention relates to an illumination system, which is a variable radiation angle illumination system that can vary the radiation angle of the illumination system, can be used in conjunction with the camera, or used for general lighting. In the case of a camera such as a security camera, video camcorder, digital camera, etc. As camera functions become more advanced, variable magnification cameras with a zoom function at a simple fixed magnification have become mainstream, and a camera with a zoom function makes a user's view angle of the camera according to a distance or a size of a subject to facilitate shooting. . Such cameras typically have an auxiliary illumination system for shooting in dark environments.

In the case of an illumination system used in conjunction with a camera, when the user increases the zoom magnification, the emission angle of the illumination system is fixed, and a mismatch between the viewing angle changed by the zoom and the emission angle at which the illumination system operates is generated. That is, the emission angle of the illumination system is, for example, about 60 degrees and the zoom is operated. For example, when photographing a long-distance subject with a viewing angle of about 20 degrees, the emission angle of the illumination system is excessive, and the camera is trying to shoot with the camera. Sufficient illumination light will not reach a distant subject. On the contrary, when the illumination system is set to a distant subject, for example, at a radiation angle of about 20 degrees, when the zoom of the camera is taken at a low magnification, for example, a near subject at a viewing angle of about 60 degrees, The illumination system has a problem of supplying light only to a part of the center of the subject.

Even in general illumination applications, when the radiation angle of the illumination system is fixed, the area illuminated by the illumination system is always fixed. Accordingly, even when only the local area is required for reading, the lighting area cannot be adjusted, thereby illuminating the unnecessary area, thereby causing a waste of power.

The present invention provides a structure and method for allowing the radiation angle of the illumination system to be adjusted as needed. That is, the distance between the lens, which is a component of the illumination system, and the light emitting source is varied by using an external control signal, thereby arbitrarily adjusting the radiation angle of light emitted through the lens. This controls the lighting area in which the lighting system operates as needed.

When the present invention is used in conjunction with a camera equipped with a zoom function, by varying the radiation angle of the illumination system in conjunction with the zoom magnification, it provides an illumination suitable for the camera viewing angle. This allows the camera to work with zoom cameras to capture both near and long distance subjects at night. In the case of using the present invention for general lighting, it is possible to selectively adjust the wide-angle and narrow-angle radiation as needed, in the case of night reading, it is possible to minimize the output of the light source by intensive narrow-angle lighting, thereby reducing power consumption. Rather, it can reduce the impact on the surrounding people due to lighting.

Fig. Conventional LED Module
Fig. Radiation angle of conventional LED module
Figure 3. Camera with zoom lens and illuminated LED
Figure 4. Variation of Viewing Angle with Zoom Magnification
Figure 5. Example of Mismatch between LED Radiation Angle and Camera Viewing Angle
Figure 6. Illumination system with multiple types of LEDs with different radiation angles
Figure 7. First embodiment of the present invention
Figure 8. Continuous Radial Angle Adjustment Example
Figure 9. Coil yoke magnetic structure
Figure 10. Magnetism structure
Figure 11. Leaf spring geometry
Figure 12. Second embodiment of the present invention
Figure 13. Two-stage Radial Angle Adjustment Example
Figure 14. Coil yoke magnetic structure
Figure 15. Magnetism structure

It will be described with reference to Fig. 1 to Fig. 6 in the prior art to which the present invention belongs.

1 is an illustration of an LED module used for various lighting.

The LED module 100 of the prior art electrically connects the LED chip 120 serving as a light source, the substrate 110 to which the LED chip 120 is electrically and mechanically connected, and the substrate 110 and the LED chip 120. A plurality of power terminals 130 for connecting to the outside, and a condenser lens 140 for condensing the light 150 emitted from the LED chip 120 at a predetermined radiation angle (160). The radiation angle 160 of the LED module is determined according to the shape and arrangement of the condenser lens 140.

FIG. 2 shows an example of two LED modules 200 and 300 having two different angles of radiation, and different emission angles 220 and 320 according to different condensing lenses 210 and 310. do.

3 is an example of a general zoom camera 400 incorporating a zoom lens and a self-illuminating device. The camera 400 includes a camera body 410, a zoom lens unit 420, and an illumination system 430. The illumination system 430 is mounted with a plurality of LED modules 440 around the optical window 421 of the zoom lens unit 420. 4 illustrates an example of the wide viewing angle 451 and the narrow viewing angle 461 when the zoom camera 400 is operated to capture the near-field subject 450 and the distant subject 460. That is, as the zoom is changed, the viewing angle of the zoom camera 400 changes. 5 illustrates a mismatch between the camera viewing angle and the radiation angle of illumination when the zoom camera 400 and the fixed radiation angle illumination system are used.

That is, when the zoom camera 400 is equipped with an illumination system of a small emission angle 452, when the zoom is operated to shoot at the wide viewing angle 451, the illumination operates only at the center of the subject.

On the contrary, when the zoom camera 400 is equipped with a large emission angle 462 illumination system, when the zoom is operated to photograph a far subject at a narrow viewing angle 461, the emission angle 462 of the illumination system is excessively spread, and the distance is long. The light reaching the subject becomes too small.

In the prior art, to solve the mismatch between the illumination radiation angle and the camera viewing angle. Using two kinds of lighting modules 200 and 300 having different radiation angles as shown in Fig. 6, one of these modules is operated in accordance with the change of the camera viewing angle to cope with the problem of misalignment of the radiation angle and the viewing angle.

The configuration of the present invention will be described with reference to Figs.

Referring to Figure 7, the present invention,

The LED chip 520 that emits light when a current is applied, the substrate 510 for electrically and mechanically connecting the LED chip, and the LED power supply terminals 513 and 514 disposed in a predetermined manner on the substrate 510. ), The module outer mechanism 541 coupled to the substrate 510, the ring-shaped coil 530, the lower plate spring 552, the ring magnet 562, ring-shaped yoke (sequentially stacked in the module outer mechanism 541) 561, the upper plate spring 551, the spacer 542, the top cover 543, and the LED chip 520 to designate an arrangement position of the upper plate spring 552 and the lower plate spring 552. Condensing lens 571 for condensing the emitted light, and a lens holder 572 for coupling the condensing lens 571 with the ring-shaped magnet 562. The ring coil 530 is electrically connected to the outside through two terminals 511 and 512 disposed at predetermined positions of the substrate 510.

The ring magnet 562, the ring yoke 561, the lens holder 572, and the condenser lens 571 are integrally coupled to form a movable part.

The movable portion, the ring-shaped coil 530, the module outer mechanism 541 and the substrate 510 is integrally coupled to form a fixed portion.

When the movable portion is disposed in the fixed portion by the upper leaf spring 551 and the lower leaf spring 552, two springs move so that the movable portion moves in the optical axis direction of the condenser lens 571. To redeem.

8 illustrates the radial angle adjustment in the present invention.

When power is applied to the LED chip 520, light is emitted at a predetermined angle through the condenser lens 571. At this time, the radiation angle changes according to the relative distance between the condenser lens 571 and the LED chip 520, and the lens has a small radiation angle as far as it can move away from the LED chip 520. That is, when the power is not applied to the ring coil 530, the light emission angle 581 is radiated to have an initial emission angle 582, the power is applied to the ring coil 530 and the movable portion is moved by electromagnetic force. When away from the LED chip 520, it has a variable radiation angle (584). The variable radiation angle 584 is adjusted by controlling the amount of current applied to the coil.

9 is an illustration of the coil, magnet and yoke structure of the present invention.

The ring coil 563 is wound in a rotational direction 533 in a ring structure, and two ends 531 and 532 of the ring coil 563 may connect two terminals 511 and 522 formed on the substrate 510. It is electrically connected to the outside through. The ring magnet 562 has a hollow ring structure, the polarity of the magnet is divided in the vertical direction (565). The ring yoke 561 has a structure coupled to the outer diameter portion and the upper portion of the ring-shaped magnet 562. 10 illustrates a principle of generating force in the above magnetic structure. When a current is applied to the ring coil 563 in a predetermined direction 534, the magnetic lines 563 formed by the ring magnet 562 and the ring yoke 561 are connected to the current flowing through the ring coil 563. The force acts to move the movable part in the optical axis direction 565 of the condenser lens 571.

11 is an illustration of a top and bottom leaf spring shape.

The upper plate spring 551 and the lower plate spring 552 are connected to the module outer mechanism 541 and the spacer 542 to be fixed to an outer ring 553, the ring magnet 560, and the lens holder ( The inner ring 554 connected to the movable portion 572 and the spring portion 556 that connects the outer ring 553 and the inner ring 554 in a flexible manner.

A second embodiment of the present invention will be described with reference to Figs.

Referring to Figure 12 the second embodiment of the present invention

LED chip 620 that emits light when a current is applied, a substrate 610 for electrically and mechanically connecting the LED chip, and an LED power supply terminal 613 or 614 disposed in a predetermined manner on the substrate 610. ), The module outer mechanism 641 coupled to the substrate 610, the ring-shaped coil 630, lower stop 652, ring magnet 662, ring-shaped yoke (sequentially stacked in the module outer mechanism 5561) 661) a light emitted from the spacer 642, the top cover 643, and the LED chip 620 for designating an interval between an upper stop 651 and the lower stop 652 and the upper stop 651. A condenser lens 671 for condensing, and a lens holder 672 for coupling the condenser lens 671 with the ring-shaped magnet 662. The ring coil 630 is electrically connected to the outside through two terminals 611 and 612 disposed at a predetermined position of the substrate 610.

The ring magnet 662, the ring yoke 661, the lens holder 672, and the condenser lens 671 are integrally coupled to form a movable part.

The movable part the ring-shaped coil 630, the module outer mechanism 641 and the substrate 610 are integrally coupled to form a fixed portion.

The movable portion is constrained by the upper stop 651 and the lower stop 652, and the movable section is determined by the length of the spacer 642.

The upper stop 651 and the lower stop 652 are made of a material having a property of adhering to a magnet, so that the ring-shaped magnet 662 magnetically on one surface of the upper stop 651 or the lower stop 652. Attached.

Figure 13 illustrates the radial angle adjustment in the second embodiment of the present invention.

When power is applied to the LED chip 620, light is emitted at a predetermined angle through the condenser lens 671. At this time, the radiation angle changes according to the relative distance between the condensing lens 671 and the LED chip 620, and has a smaller radiation angle as the lens moves away from the LED chip 620.

That is, when the ring-shaped coil 630 is in an initial state where no power is applied, the ring-shaped magnet 662 is in a state of being magnetically attached to the lower stop 652, so that the condenser lens 671 and the LED chip. The distance from 620 is the maximum. The radiation angle at this time forms the maximum radiation angle 682. The ring-shaped magnet 662 is predetermined when the light-coiling angle light 581 is emitted to the ring-shaped coil so that the condensing lens has an initial emission angle 582, and the power is supplied to the ring-shaped coil 630 in a predetermined direction. ) Generates a force in a direction away from the LED chip 620, the ring-shaped magnet 662 is attached to the upper stop 651. At this time, the condenser lens 671 from the LED chip 620 The longest distance is obtained, and the minimum radial angle 682 is obtained.

In order to switch back to the maximum radiation angle 684 in this state, the current applied to the ring coil 630 is reversed, and the ring magnet 662 generates a force in the direction of the LED chip 620. The ring magnet 662 is to be seated on the lower stop 652.

Degree. 14 is an illustration of the coil, magnet and yoke structure in the second embodiment of the present invention.

The ring coil 630 is wound in a rotational direction 633 in a ring structure, so that two ends 631 and 632 of the ring coil 663 are formed through two terminals 611 and 622 formed on the substrate 610. The ring magnet 662 has a hollow ring structure, and the polarity of the magnet is divided in the up and down direction 665. The ring yoke 661 is the outside of the ring magnet 662. The principle of generating force in the magnetic structure is illustrated in Fig. 15. When a current is applied to the ring coil 630 in a predetermined direction 634, the ring magnet 662 is applied. And a magnetic force line 663 formed by the ring yoke 661 interact with current flowing through the ring coil 663 to move the movable part in the optical axis direction 665 of the condenser lens 671. .

400: zoom camera
420: zoom lens
430: lighting device
500: Continuously variable radial angle variable module
600: 2-stage variable radial angle variable module
520: LED chip
510: substrate
530, 630: ring coil
541, 641: Outer Organization
542, 642: spacer
551, 552: upper and lower leaf springs
561, 661: ring-shaped yoke
562, 662: ring magnet
571, 671: condensing lens
651, 652: top and bottom stop

Claims

A light source emitting light when power is applied;
A substrate for electrically and mechanically connecting the light source;
An outer mechanism seated at the substrate;
A condenser lens for condensing light emitted from the light source and disposed inside the outer mechanism; A driving unit generating a force for moving the condensing lens in a direction coinciding with the optical axis of the light source; illumination comprising a driving guide constraining a driving direction so that the condensing lens can move along the optical axis direction of the light source Device.

The light source of claim 1 may use an LED having a predetermined wavelength, and light emitted from the light source is emitted through the condenser lens, and an emission angle of the light is determined according to a distance between the condenser lens and the light source.

The driving unit of claim 1 may be configured by an electromagnetic force, and when the electromagnetic force is configured, a ring magnet having a concentric structure and a ring yoke and a ring coil may be formed on the outer side of the condensing lens and the inner side of the outer mechanism. The ring-shaped yoke is integrally coupled to have a structure that is concentrically stacked on the ring-shaped coil.

According to claim 3, wherein one of the ring-shaped magnet and the ring-shaped yoke combination or the ring-shaped coil is attached to the outside of the condenser lens and the movable portion moving in the optical axis direction of the light source integrally with the condenser lens, the other is the outer member It is combined with the inside to become a fixed part.

The driving guide of claim 1, wherein the driving guide functions to move along the optical axis direction of the light source, and comprises one or more ring-shaped leaf springs connecting the movable section and the fixing section.

4. The method of claim 3, wherein when the current is applied to the ring coil, the movable portion generates a driving force in the optical axis direction of the light source due to the interaction between the ring coil and the ring magnet, and the direction and intensity of the force are applied to the ring coil. It is determined by the magnitude and direction of the current.

According to claim 1, When the distance between the condenser lens and the light source by the force generated by the drive unit changes the emission angle of light emitted from the light source and emitted through the condenser lens.

A light source emitting light when power is applied;
A substrate for electrically and mechanically connecting the light source;
An outer mechanism seated at the substrate;
A condenser lens for condensing light emitted from the light source and disposed inside the outer mechanism;
A driving unit generating a force for moving the condensing lens in a direction coinciding with the optical axis of the light source;

The light source of claim 8 may use an LED having a predetermined wavelength, and light emitted from the light source is emitted through the condenser lens, and an emission angle of the light is determined according to a distance between the condenser lens and the light source.

A ninth driving part is electromagnetically configured, and a ring magnet and a ring yoke having a concentric structure with the condenser lens are integrally coupled to the outside of the condenser lens to form a movable part which moves in the optical axis direction of the light source; Inside the outer mechanism, the ring-shaped magnet and the concentric ring-shaped coil are disposed to form a fixing part.

The ring magnet and the ring yoke assembly are assembled concentrically in a laminated structure with the ring coil. When the current is applied to the ring coil, the ring magnet and the ring yoke assembly are forced in the direction of the optical axis of the light source. The force generation direction is determined according to the direction of the current applied to the ring coil.

The method of claim 10, wherein the ring-shaped magnet can be moved forward or backward along the direction of the optical axis of the light source according to the direction of the current applied to the ring-shaped coil, two front and rear disposed in front and rear to specify the driving range of the ring-shaped magnet do.

13. The method of claim 12, wherein the stopper has a property of attaching to a magnet so that the ring magnet is stably attached to the stopper when the ring magnet is in the stopper position without applying current to the ring coil. When the direction of the current flowing through the ring-shaped coil is applied, the ring-shaped magnet is attached to another star wave stably so that the ring-shaped magnet has two stable positions.

14. The light collecting lens of claim 13, wherein the condensing lens moves in unison with the ring-shaped magnet to have two stable positions, thereby having two radiation angles.

Camera apparatus for adjusting the radiation angle in conjunction with the change in the zoom ratio of the zoom camera using the variable radiation angle illumination device of claim 1

Lighting device for continuously controlling the radiation angle of the headlight by applying the variable radiation angle lighting device of claim 1 to the headlights of electric cars, bicycles, etc.

The variable radiation angle lighting device of claim 1 and 8 is applied to a vehicle interior light so that a wide radiation angle can be applied in a normal mode, and a narrow radiation angle can be selected in a concentrated mode for reading light.

An illumination device that can optimize the current consumption according to use by applying the variable radiation angle lighting device of claim 1 and 8 to select the indoor lighting condition as the concentrated mode and the wide angle mode.

An illumination device that applies the variable radiation angle illumination device of claim 1 to claim 8 to a portable light, so that the long range and short range illumination modes can be selected.