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Camera-used arrayed LED spotlight

A technology of light-emitting diodes and flashlights, applied in the field of flashlights, can solve problems such as power consumption, inconsistent light and shade, and inconformity with cameras, and achieve the effects of saving power, uniform light intensity, and avoiding high temperature

Inactive Publication Date: 2010-02-03
E PIN OPTICAL IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the brightness of LEDs is much lower than that of traditional xenon lamps, the LED array required for photography is composed of only a few LEDs. If it is not properly arranged, the light will be at the target and the brightness will not be uniform. , does not meet the needs of camera shooting. For example, when shooting portraits, there will be uneven light and shade; moreover, the use of pulse (pulse) or time control in the prior art may cause uneven brightness of each LED, which cannot be solved in addition to power consumption Reservation light type
The existing LED flash can be made by such as figure 1 The LED light source 23 shown constitutes, after the LED chip 233 on the LED substrate 24 emits light, it is reflected and collected by a parabolic reflector (reflector) 28, and is irradiated on the target; , under the limitation of the limited brightness of the LED light source 23, how to gather several LED light sources 23 to form a predetermined light pattern on the target object, and then effectively control it, will be a practical problem that is paid attention to.

Method used

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  • Camera-used arrayed LED spotlight

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0031] refer to Figure 3-5 , the array type LED flashlight 20 that the camera of present embodiment is used comprises an LED array 21 and a controller 22; On the substrate 24, the LED substrate 24 is connected to the controller 22 and is controlled by the controller 22. The controller 22 is also connected to the battery 11 and the button 30. The button 30 can select the mode of the flashlight and is powered by the battery 11. To drive the controller 22 and the array LED flashlight 20 . When the LED light source 23 is supplied with voltage and current by the controller 22 and the LED substrate 24 , it can emit light of a predetermined light type 26 . In this embodiment, the LED light source 23 is a high-power white LED, and the LED light source 23 is composed of a first order lens / primary lens 2321 and an LED chip (LED die) 233. After the LED chip 233 is excited, Light is emitted, and a predetermined light pattern (Distribution Pattern) 26 is emitted by the primary optical l...

no. 2 example

[0036] refer to Figure 6-8 The arrayed LED flashlight 20 of the present embodiment utilizes three LED light sources 23 to form a laterally arranged LED array 21 to form an oblong light pattern 26c with uniform brightness on the target; the LED light source 23 also uses high Brightness white LED, the LED light source 23 is composed of a primary optical lens 2322 and an LED chip 233 , the LED chip 233 emits light after being excited, and the primary optical lens 2322 emits a predetermined light pattern 26 . like Image 6 As shown, the primary optical lens 2322 of the LED light source 23 adopts a crescent-shaped aspherical lens, and its concave surface is on the side of the LED chip 233 and its convex surface is on the target side; For the light type 26a, the LED light source 23b located on both sides, and its primary optical lens 2322 also adopts crescent-shaped aspherical lenses with different optical parameters, which can form a 90° narrow illumination angle light type 26b. ...

no. 3 example

[0039] refer to Figure 9-10As shown, the arrayed LED flashlight 20 of this embodiment includes a horizontally arranged LED array 21 and a secondary optical lens 25 formed by three LED light sources 23, so as to form an oblong combined light with uniform brightness on the target object. Type 26c; LED light source 23 is made of primary optical lens 2322 and LED chip 233, and wherein primary optical lens 2322 is to adopt crescent-shaped aspheric lens as the second embodiment, its concave surface is on LED chip 233 side and convex surface is on the target object side; the LED light source 23a in the middle can emit an elliptical light pattern 26a of 120°x90°, and the LED light source 23b on both sides, its primary optical lens 2322 also adopts a crescent-shaped aspheric lens with different optical parameters, which can form a 90° °Narrow illumination angle light type 26b. In this embodiment, a secondary optical lens (second order lens / secondarylens) 25 is further covered on the ...

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Abstract

The invention relates to a camera-used arrayed LED spotlight which is mainly composed of an LED array and a controller, wherein the LED array further comprises a plurality of LED light sources which are provided with a primary optical lens encapsulated on an LED substrate so as to generate different distribution patterns and covered with a secondary optical lens, and the LED light sources with different combination of distribution patterns are used for generating ordered oblongoval or round distribution patterns of the spotlight; the controller can control the spotlight to actuate with slightparallel current under a first mode, and control the spotlight to actuate with high parallel current pulse and time under a second mode; therefore, the arrayed LED spotlight can save camera battery power, avoid high temperature caused by long-term use, and generate ordered distribution patterns with uniform light intensity.

Description

technical field [0001] The invention relates to a flashlight for a camera, in particular to an array type light-emitting diode (LED) flashlight for a camera. Background technique [0002] In the field of camera use, xenon lamps (Xenon) are often used as the light source of flash lamps. Xenon lamps use the bright light generated by the high-voltage discharge between electrodes to produce lighting flashes; the main advantage of xenon lamps is that the spectrum (Spectrum) in the visible range is very large The flat and produced chromaticity values ​​are good and conform to the characteristics of human vision. Another advantage is that the warm-up time is very short. In addition, since the filled gas xenon is an inert gas, there is no danger of explosion; but Its main disadvantages are low luminous efficiency, short bulb life, high price, and too much heat flow when used. When the xenon lamp is used in the flash of the camera, it consumes a lot of power, so that the camera cann...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B15/05F21V33/00F21S10/06F21V5/04F21V23/00H05B37/02F21Y101/02
CPCY02B20/40
Inventor 徐三伟林宇峰游腾健廖怡芬
Owner E PIN OPTICAL IND