CN201607600U

CN201607600U - Flash light source of camera

Info

Publication number: CN201607600U
Application number: CN2009202121575U
Authority: CN
Inventors: 范刚; 王化锋; 章千
Original assignee: Jiashan Jinghui Optoelectronics Technology Co Ltd; Shanghai Sansi Technology Co Ltd
Current assignee: Jiashan Jinghui Optoelectronics Technology Co Ltd; Shanghai Sansi Technology Co Ltd
Priority date: 2009-11-10
Filing date: 2009-11-10
Publication date: 2010-10-13
Anticipated expiration: 2019-11-10

Abstract

The utility model relates to a flash light source of a camera, which comprises one or a plurality of white light LEDs; the flash light source also comprises LEDs in other colors used for compensating for light energy in relatively weaker wave bands in the white light LED; and the LEDs in other colors and the white light LED are distributed at intervals. The colors and the number of the LEDs in other colors shall enable the spectral energy of the flash light source after compensation to meet the spectral response characteristic requirements of a camera photosensitive component. The LEDs in other colors only give off light upon photography. The flash light source of the camera effectively solves the defects of the prior art that when the low-development index white light LED serves as the flash light source of the camera, the original colors of an object cannot be correctly reflected, and can take care of the utilization efficiency of the camera to the flash light source while improving the development index of the white light LED.

Description

A kind of flashlamp light source of camera

Technical field

The utility model relates to a kind of light source, further, relates to a kind of flashlamp light source of camera.

Background technology

Light source is called colour rendering to the colour developing ability of object, and the method for estimating color rendering properties of light source is a colour rendering index.When the spectral composition of light source was wide, its colour rendering index was just high.And colour rendering index is high more, more the original color of represented object that can be correct.Incandescent lamp is the best light fixture of colour rendering, and its colour rendering index is near 100.

Along with the advantage of led light source is familiar with and widespread use by people, it replaces the trend of conventional lamp such as incandescent lamp more and more obvious.But because the spectral distribution of white light LEDs is narrower, colour rendering index is not high, and need be to the accurate occasion of reflection of color, when taking a picture, if when using as the flashlamp light source with LED, it be difficult to correctly and the color of represented object clearly.

For addressing this problem, people have developed the white light LEDs of high color rendering index (CRI).But because the restriction of the white light LEDs material therefor of present this high color rendering index (CRI) causes the efficient of its use not high.

The utility model content

The utility model provides a kind of flashlamp light source of camera for addressing the above problem.It is low to efficiently solve the white light LEDs colour rendering index, the correct defective of the original color of represented object, and when improving the white light LEDs colour rendering index, can take into account the light source service efficiency.

For achieving the above object, the technical solution adopted in the utility model is as follows:

A kind of flashlamp light source of camera, comprise a plurality of white light LEDs, it is characterized in that: this flashlamp light source comprises also and is used for compensating described white light LEDs relatively than other colors LED of the luminous energy in the smooth sea section that this other colors LED and described white light LEDs are spaced apart.

Described other colors LED, color that is adopted and quantity are so that the spectral power distribution of flashlamp light source after the compensation meets the requirement of the spectral response characteristic of camera photo-sensitive cell is condition.

The LED of described other colors is only luminous in the moment of taking pictures.

The beneficial effect that the utility model brings:

Technical solutions of the utility model are improvement of adopting the white light LEDs of low colour rendering index to make as light source to existing camera flash-light.This scheme is between the white light LEDs of low colour rendering index, situation according to its spectral energy composition, to wherein lack or more weak relatively wave band in light ray energy reasonably compensate, promptly mainly be distributed in LED in the required compensated wave segment limit by configuration energy, the light ray energy of compensation white light LEDs in this wave band, improve the colour rendering index of white light LEDs, solve the aberration big problem of flashlamp light source this wave band color reflection, thus the original color of more accurate represented object.Further, when taking pictures in order to improve camera to the utilization factor of light, as long as make the spectral response characteristic of the spectral power distribution of the flashlamp after the compensation near the camera photo-sensitive cell.Simultaneously, the LED of other colors of embedding is only luminous in the moment of taking pictures, and saves luminous energy.

Description of drawings

Fig. 1 is the utility model first embodiment synoptic diagram;

Fig. 2 is the utility model second embodiment synoptic diagram;

Fig. 3 is the spectrogram of white light source among Fig. 1 and Fig. 2;

Fig. 4 is the spectrogram of Fig. 1 embodiment;

Fig. 5 is the spectral response characteristic figure of camera photo-sensitive cell.

Embodiment

Below by accompanying drawing the utility model is done further detailed description:

Referring to Fig. 1～Fig. 3, the flashlamp light source of the utility model first and second embodiment, the spectral power distribution of its white light LEDs that adopts 1 under a certain colour temperature is as shown in Figure 3.The colour rendering index of this white light LEDs is 73.From Fig. 3 as seen, the energy distribution of this white light LEDs is mainly in territory, blue area partially, red sector territory energy distribution partially a little less than.When using as the flashlamp light source of taking pictures with this white light LEDs, taking the object color of coming will be blue partially, can not correctly and clearly be reflected the color relation in the red partially wave band.

Adopt the technical scheme of the utility model first embodiment, promptly between five white light LEDs 1, embed four other colors LED 2, the energy of this other color LED 2 mainly is distributed in the red partially wave band, makes that like this white light LEDs 1 more weak luminous energy that distributes in red partially wave band is compensated.After mending red partially LED 2 in the white light LEDs 1 of inclined to one side indigo plant, the spectral power distribution that obtains as shown in Figure 4, the LED flashlamp light source colour rendering index after this compensation is 97, approaches the colour rendering index 100 of incandescent lamp.

From Fig. 5 as seen, the camera photo-sensitive cell can't respond in the light color beyond 400nm～700nm scope wavelength, so the light beyond 400nm～700nm scope is not needed to compensate.Therefore, in order to improve the utilization factor of camera to the flashlamp light source, in the utility model second embodiment, mend spectral power distribution behind other colors LED 3 of 400nm～700nm, as long as the spectral power distribution of resulting LED flashlamp light source satisfies the spectral response characteristic of camera photo-sensitive cell.

According to the spectral power distribution of different white light LEDs, the spectral distribution of mending other colors LED that goes into also can be different.Can be inclined to one side blue light, also can be inclined to one side green glow etc.

Claims

1. the flashlamp light source of a camera, comprise a plurality of white light LEDs, it is characterized in that: described flashlamp light source comprises also and is used for compensating described white light LEDs relatively than other colors LED of the luminous energy in the smooth sea section that this other colors LED and white light LEDs are spaced apart.

2. the flashlamp light source of camera according to claim 1, it is characterized in that: the spectral power distribution of described other colors LED is at 400nm～700nm.