WO2009096677A1 - Module caméra à plate-forme portable - Google Patents

Module caméra à plate-forme portable Download PDF

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Publication number
WO2009096677A1
WO2009096677A1 PCT/KR2009/000313 KR2009000313W WO2009096677A1 WO 2009096677 A1 WO2009096677 A1 WO 2009096677A1 KR 2009000313 W KR2009000313 W KR 2009000313W WO 2009096677 A1 WO2009096677 A1 WO 2009096677A1
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WO
WIPO (PCT)
Prior art keywords
infrared light
camera
emitting diode
subject
unit
Prior art date
Application number
PCT/KR2009/000313
Other languages
English (en)
Korean (ko)
Inventor
Sang Il Jung
Sang Woo Lee
Original Assignee
Kraze Vina Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020080054595A external-priority patent/KR100866475B1/ko
Application filed by Kraze Vina Inc. filed Critical Kraze Vina Inc.
Publication of WO2009096677A1 publication Critical patent/WO2009096677A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/56—Cameras or camera modules comprising electronic image sensors; Control thereof provided with illuminating means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/10—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from different wavelengths
    • H04N23/11—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from different wavelengths for generating image signals from visible and infrared light wavelengths
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices

Definitions

  • the present invention relates to a camera module and a portable terminal having the same, and more particularly, to an infrared light emitting diode (InfraRed Emitting Diode: IRED) that emits infrared light having a wavelength range of 830 nm to 880 nm.
  • IRED infrared light emitting diode
  • the present invention relates to a camera photographing module capable of making a video call at night and a portable terminal for video calling having the same.
  • Representative composite electronic devices include mobile phones having a camera module in which a mobile phone and a camera are combined.
  • the initial mobile phone was designed to make only a voice call, but as the popularity of mobile phones has increased rapidly, the manufacturing technology and communication technology of mobile phones have dramatically developed. As a result, mobile phones support multiple chord ringtones or color displays, and various functions such as playing games, searching the Internet, receiving and sending e-mails, and paying bills are becoming common.
  • a so-called camera phone that has an optical camera attached to a mobile phone has been developed to take a picture of a subject and wirelessly transmit and receive a captured image. It is gone.
  • a video call phone capable of making a video call using a camera between two or more parties has been developed and used.
  • the camera included in the mobile phone is substantially composed of a CMOS Image Sensor (CIS) camera module composed of an image pickup device coupled with a lens module.
  • the camera module includes a condenser lens, an infrared filter, an image sensor, and a barrel or a housing.
  • the condenser lens collects light incident from a subject on an image sensor, and the infrared filter is provided on an upper surface of the condenser lens to block infrared components included in the incident light.
  • the image sensor includes a CMOS or CCD image sensor, and an image of the subject is formed by the condenser lens.
  • the housing aligns the condenser lens, infrared filter and image sensor on the same optical axis.
  • a communication device (hereinafter, referred to as a composite device) having a complex function has emerged, the user is interested in not only the function of the composite device but also the portability. That is, the user wants a multi-use device that is convenient to use, portable, and excellent in performance. In order to meet the needs of users, efforts and developments to improve performance while reducing the volume through the compactness of all the components constituting the multi-component device continue.
  • the camera uses infrared rays to photograph at night as well as during the day.
  • the infrared imaging is installed in a number of underground parking lots or public places at night, which do not need to brighten the lights, and is frequently used for crime prevention such as security, theft prevention, or parking violation control.
  • the CIS camera used in the composite device has a disadvantage in that shooting is free in bright lighting but difficult to shoot in a place without lighting or at night.
  • imaging equipment using a CMOS or CCD image sensor is equipped with an infrared cut filter in the camera module so that infrared light is not focused on the light incident from the image sensor, and even if a small amount of infrared light is collected, the infrared light is collected.
  • Infrared imaging is impossible because it does not have an infrared detector that detects and converts it into an electrical signal.
  • the image quality of the captured image is very poor when the surrounding environment is dark, or the image quality of the mobile phone can be hardly recognized at all. Due to these limitations, a problem arises in that it cannot be applied to a mobile phone providing a free call regardless of a place that can be said to be the biggest advantage of the mobile phone. Accordingly, there is a problem that results in a great inconvenience for the user who wants to make a video call freely without restriction in place.
  • the present invention has been made in view of the above problems, and an object of the present invention is to enable a video call by applying an infrared light emitting diode (InfraRed Emitting Diode: IRED) to emit infrared light having a wavelength range of 830 nm to 880 nm. It is to provide a camera module.
  • IRED infrared light emitting diode
  • Another object of the present invention is to provide a portable terminal including the camera module.
  • the camera module includes a camera unit, an infrared light emitting diode (IRED) unit, a controller, and a transmitter.
  • the camera unit photographs a subject based on the input infrared or visible light and converts the subject into an electrical signal.
  • the infrared light emitting diode (IRED) part is formed to be spaced apart from the camera part by 12 mm or more to remove white eye phenomenon that occurs during the video call function, and has a wavelength band of 830 nm to 880 nm and 16 degrees to the subject. It emits infrared light with a direction angle [theta] of 28 degrees.
  • the controller transmits an electrical signal output from the camera unit to an external composite device, and controls the camera unit and the infrared light emitting diode unit according to a control signal input from the composite device.
  • the transmitter transmits and receives an electrical signal between the camera unit, the infrared light emitting diode unit, and the controller.
  • the camera unit includes a condenser lens, an image sensor, and a housing.
  • the condenser lens focuses light incident from the subject.
  • the image sensor forms an image of the subject by the condensing lens.
  • the image sensor converts infrared light among the light incident through the condensing lens into an electrical signal.
  • the housing aligns the condenser lens and the image sensor on the same optical axis.
  • the infrared light emitting diode unit may be formed to be spaced apart from the camera unit by 12 mm to 36 mm.
  • the transmission unit may be composed of a flexible printed circuit board (FPCB).
  • FPCB flexible printed circuit board
  • the portable terminal according to the embodiments of the present invention is integrated with a camera module having the above-described features and devices having different functions.
  • the camera module and the portable terminal having the same according to the present invention as described above has the following effects.
  • the CIS camera used in the composite device includes an image sensor for detecting an infrared light component of incident light, so that a subject can be photographed at a place with bright lighting as well as at a place without lighting or at night.
  • the infrared light emitting diode unit emits only infrared light having a wavelength band of 830 nm to 880 nm to photograph the subject, thereby reducing power consumption of the portable terminal and improving image quality of the captured image.
  • the white light phenomenon generated in the captured image may be removed to achieve more clear image quality at night.
  • FIG. 1 is a view for explaining a camera module according to an embodiment of the present invention.
  • FIG. 2 is a diagram illustrating the structure of the camera unit illustrated in FIG. 1 in detail.
  • FIG. 3 is a view for explaining the principle of image acquisition of the camera module according to an embodiment of the present invention.
  • FIG. 5 is a photograph of an actual photograph of a subject according to a separation distance between the camera unit and the infrared light emitting diode unit of FIG. 1.
  • FIG. 6 is a table for describing pupil brightness of subjects according to the separation distance of FIG. 5.
  • FIG. 7 is a graph for describing the separation distance and pupil brightness of FIG. 6.
  • FIG. 8 is a photograph of an actual photograph of a subject according to a direction angle of infrared light emitted from the infrared light emitting diode unit of FIG. 1.
  • FIG. 9 is a table for describing brightness of pictures according to the orientation angle of FIG. 8.
  • FIG. 10 is a graph for describing the directivity angle of FIG. 9 and the brightness of photographs.
  • FIG. 11 is a diagram illustrating a case where a subject is photographed at night without lighting by using a conventional portable terminal and a portable terminal according to the present invention.
  • first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.
  • the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.
  • all terms used herein, including technical or scientific terms have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.
  • FIG. 1 is a view for explaining a camera module according to an embodiment of the present invention
  • Figure 2 is a block diagram for explaining in detail the structure of the camera shown in FIG.
  • a camera module includes a camera unit 100, an infrared light emitting diode (IRED) unit 200, a transmitter 300, and a controller 400.
  • IRED infrared light emitting diode
  • the camera unit 100 is mounted in one region on the substrate 150. At this time, the camera unit 100 and the substrate 150 are electrically coupled to each other by the bonding wire 140.
  • the substrate 150 may include a printed circuit board (PCB), a flexible circuit board (FPCB), a ceramic substrate, and the like.
  • the camera unit 100 photographs a subject based on the input infrared light or visible light and converts the subject into an electric signal.
  • the camera unit 100 converts an image signal from the subject into an electrical signal.
  • the camera unit 100 includes a condenser lens 110, an image sensor 120, and a housing 130.
  • the condenser lens 110 condenses light for representing an image to the image sensor 120.
  • the image refers to an image incident from the subject.
  • the condenser lens 110 is disposed in front of the camera unit 100 based on the subject to focus the image signal for representing the image of the subject to the image sensor 120.
  • the condenser lens 110 may be a convex lens.
  • the image sensor 120 is disposed in a region where an image image of a subject collected by the condenser lens 110 is formed. That is, the image sensor 120 is disposed at the rear end of the condenser lens 110 based on the subject, and the light collected from the condenser lens 110 is formed on the image sensor 120.
  • the condenser lens 110 and the image sensor 120 are spaced apart from each other by a predetermined distance.
  • the spaced distance may be adjusted to correspond to the focal length of the condenser lens 110.
  • the distance between the condenser lens 110 and the image sensor 120 may be adjusted to correspond to the infrared light shooting at night and the visible light shooting at the daytime shooting, respectively. Accordingly, by controlling the focal length according to the infrared light and the visible light, it is possible to implement a clearer picture quality.
  • the separation distance may be controlled through a switch (not shown) separately disposed outside.
  • a servo motor or the like may be used.
  • clear image quality can also be achieved through software image quality correction rather than mechanical distance control.
  • the image sensor 120 senses visible light and infrared light having a specific wavelength band.
  • the image sensor 120 may include a charge coupled device (CCD) image sensor, a complementary metal oxide image sensor, or the like.
  • CCD charge coupled device
  • the image sensor 120 may sense an image of the subject by flowing a current corresponding to the focused light.
  • the image sensor 120 converts infrared light among incident light into an electrical signal.
  • the housing 130 or the barrel is disposed to protect the condenser lens 110 and the image sensor 120 from external shocks.
  • the housing 130 integrates the condenser lens 110 and the image sensor 120 into an integrated camera unit 100 spaced apart by a predetermined interval.
  • the housing 130 aligns the condenser lens 110 and the image sensor 120 on the same optical axis. That is, the housing 130 arranges the condenser lens 110 and the image sensor 120 such that the subject, the condenser lens 110 and the image sensor 120 are aligned on the same optical axis.
  • the infrared light emitting diode unit 200 is spaced apart from the camera unit 100 by a predetermined distance and mounted in a region on the substrate 150. That is, the camera unit 100 and the infrared light emitting diode unit 200 are spaced apart from each other on one region of the substrate 150.
  • the infrared light emitting diode unit 200 is disposed to be spaced apart from the camera unit 100 by 12 mm or more.
  • the infrared light emitting diode unit 200 is disposed to be spaced apart from the camera unit 100 by 12 mm to 36 mm. A description of the separation distance between the infrared light emitting diode unit 200 and the camera unit 100 will be described in detail with reference to FIG. 3.
  • the infrared light emitting diode unit 200 emits infrared light toward the subject.
  • the infrared light emitting diode unit 200 emits infrared light having a wavelength band of 830nm to 880nm.
  • the directivity angle ⁇ of the infrared light emitted from the infrared light emitting diode unit 200 may be 16 degrees to 28 degrees. The description of the direction angle ⁇ will be described in detail with reference to FIG. 3 and the like.
  • the transmitter 300 transmits and receives an electrical signal between the camera unit 100, the infrared light emitting diode unit 200, and the controller 400.
  • the transmitter 300 transmits an electric signal related to the image of the subject sensed by the camera unit 100 to the controller 400.
  • the transmitter 300 receives a control signal regarding the operation of the camera unit 100 and the infrared light emitting diode unit 200 from the control unit 400 and transmits the control signal to the camera unit 100 and the infrared light emitting diode unit 200.
  • the transmitter 300 is composed of a flexible printed circuit board (FPCB).
  • the transmitter 300 may include various means for transmitting and receiving an electrical signal between the camera unit 100, the infrared light emitting diode unit 200, and the controller 400.
  • the controller 400 transmits an electrical signal output from the camera unit 100 to an external device such as a mobile phone, and controls the camera unit 100 and the infrared light emitting diode unit 200 according to a control signal input from the external device. do.
  • the controller 400 is electrically connected to the camera unit 100 and the infrared light emitting diode unit 200 through the transmitter 300.
  • the controller 400 may include one region of the substrate 150 on which the camera unit 100 and the infrared light emitting diode unit 200 are disposed, and the other region of the adjacent substrate 150 with the transmitter 300 interposed therebetween. Can be placed in.
  • the camera module according to the embodiment of the present invention may improve the photographing quality of the subject by adjusting the separation distance between the camera unit 100 and the infrared light emitting diode unit 200.
  • FIG 3 is a view illustrating an image acquisition principle of a camera module according to an embodiment of the present invention
  • Figure 4 is a graph showing the sensor sensitivity of the image sensor according to the wavelength of the infrared light.
  • the infrared light emitting diode unit 200 when taking a picture or making a video call at night using a camera module of a composite device such as a mobile phone, the infrared light emitting diode unit 200 emits infrared light of a predetermined wavelength to a subject, and the camera unit The sensor 100 senses the infrared light reflected from the subject, converts the infrared light into an electric signal, and transmits it to an external composite device. In this way, the camera module can capture an image of the subject.
  • the camera module provided in the conventional camera phone, the conventional video call phone, etc. the optical axis of the camera unit 100 and the light axis of the infrared light emitting diode unit 200 is almost parallel. That is, the camera unit 100 and the infrared light emitting diode unit 200 are disposed adjacent to each other.
  • the white neck phenomenon occurs more frequently in accordance with the miniaturization of a mobile phone, the simplification of the design, and the like.
  • the camera unit 100 and the infrared light emitting diode unit 200 need to be spaced apart by a predetermined distance or more.
  • the camera unit 100 and the infrared light emitting diode unit 200 are arranged to be spaced apart from each other by 12 mm or more. Specifically, the camera unit 100 and the infrared light emitting diode unit 200 are spaced apart from each other by 12 mm to 36 mm. As such, by arranging the camera unit 100 and the infrared light emitting diode unit 200 so as to be spaced apart by 12 mm or more, deterioration in photographing quality such as white-eye phenomenon and red-eye phenomenon is prevented.
  • FIGS. 5 to 11 Since experimental data and photographing pictures for explaining the prevention of white neck phenomenon according to the separation distance between the camera unit 100 and the infrared light emitting diode unit 200 are shown in detail in FIGS. 5 to 11, FIGS. This will be described in detail with reference to 11.
  • the infrared light emitting diode unit 200 emits infrared light having a wavelength band of 830nm to 880nm. Therefore, the image sensor 120 of the camera unit 100 is an area where the image of the subject is sensed, and senses only infrared light having a wavelength band of 830 nm to 880 nm emitted from the infrared light emitting diode unit 200.
  • the infrared light emitting diode unit 200 emits only infrared light having a wavelength band of 830 nm to 880 nm so that the image sensor 120 senses only the wavelength band of 830 nm to 880 nm. Radiate.
  • the wavelength range of the infrared light component sensed by the image sensor 120 is limited to 830 nm to 880 nm, so that the camera unit 100 including the image sensor 120 can clearly display both the infrared light and the visible light. While minimizing power consumption.
  • the infrared light emitting diode unit 200 uses infrared light in the wavelength range of 830 nm to 880 nm, it may be difficult to capture a clear image at a distance of the focal length between the infrared light and the visible light during the long distance shooting.
  • the camera module implemented in a composite device such as a mobile phone is mainly used for short-range photography instead of long-range photography, the deterioration of image quality due to the separation of the focal length will hardly occur.
  • the present invention can be applied to a technique used for near field photographing in a portable terminal such as a video call.
  • the directivity angle ⁇ of the infrared light emitted from the infrared light emitting diode unit 200 may be 16 degrees to 28 degrees.
  • the direction angle ⁇ refers to the angle range of the entire infrared light emitted from the infrared light emitting diode unit 200 on the basis of the line extending from the optical axis of the infrared light emitting diode unit 200. Accordingly, when the intensity of the infrared light emitted from the infrared light emitting diode unit 200 is constant, the light density of the infrared light emitted may vary according to the size of the directivity angle ⁇ .
  • the infrared light emitting diode unit 200 emits infrared light having a directivity angle of 16 degrees to 28 degrees, thereby realizing the brightness of the subject and the surrounding object as the optimum conditions.
  • the wavelength band and the directivity angle ⁇ of the infrared light emitted from the infrared light emitting diode unit 200 and maintaining the separation distance between the infrared light emitting diode unit 200 and the camera unit 100 by 12 mm or more, It can effectively eliminate white spots that occur during shooting or video calls.
  • FIG. 5 is a photograph of an actual photograph of a subject according to a separation distance between the camera unit and the infrared light emitting diode unit of FIG. 1, and FIG. 6 is a table for describing pupil brightness of the subjects of the photographs according to the separation distance of FIG. 5.
  • FIG. 7 is a graph for describing the separation distance and pupil brightness of FIG. 6.
  • the separation distance between the camera unit 100 and the infrared light emitting diode unit 200, the directivity angle of the infrared light emitted by the infrared light emitting diode unit 200, and the brightness of the surrounding environment to photograph the subject was tested according to the illuminance indicating.
  • the distance between the camera unit 100 and the infrared light emitting diode unit 200 was set to 8 mm, 10 mm, 12 mm, 20 mm, 28 mm as measured values, and the infrared light emitting diode unit 200 emits the light.
  • the directivity angle of infrared light is set to 20 degrees.
  • illuminance was set to 0, 5, 10 lux (lux) as the measured value.
  • 0 to 10lx all represent the brightness of a dark environment or an environment photographed at night, the experimental data values for illuminance are substantially no difference. Therefore, the detailed description of the results according to the roughness of the experimental data will be omitted.
  • the brightness of black representing the eye color is defined as 7.5 IRE (Institute of Radio Engineers). This is cited by the Institute of Electrical and Electronics Engineers (IEEE), which defines the black level of brightness (luminance) as 7.5 IRE.
  • the IRE expresses the brightness of a video signal as a percentage of the highest brightness to represent a relationship between video electrical output, brightness, and density by the IEEE.
  • white in the video signal refers to 100 IRE
  • black refers to 0 IRE.
  • 0 IRE means a level without the video signal itself (ie, Pedestal Level), so the brightness (luminance) of the actual black level is 7.5 IRE. Therefore, in this experiment, in order to express the brightness of black corresponding to the eye color of the subject, the eye brightness of the photographed subject should be defined as 7.5 IRE or less.
  • the separation distance between the camera unit 100 and the infrared light emitting diode unit 200 is 10 In the case of mm or less, it can be seen that the white neck phenomenon occurs in the pictures of the subject. On the contrary, when the separation distance between the camera unit 100 and the infrared light emitting diode unit 200 is 12 mm or more, it can be seen that the white neck phenomenon does not occur. Therefore, according to the experimental data, it can be said that there is a critical significance before and after the separation distance between the camera unit 100 and the infrared light emitting diode unit 200 is 12mm. Of course, the same result can be obtained when the photographs of the subjects are visually observed.
  • the eye brightness of the subject was measured to examine the occurrence of white eye phenomenon in the photographed picture according to the separation distance between the camera unit 100 and the infrared light emitting diode unit 200.
  • the pupil brightness of the subject is 7.5 IRE or less
  • black is expressed.
  • the separation distance between the camera unit 100 and the infrared light emitting diode unit 200 is 10 mm
  • the pupil brightness of the subject is 26, 28, 32 IRE.
  • the separation distance between the camera unit 100 and the infrared light emitting diode unit 200 is 11 mm, it can be seen that the pupil brightness of the subject is 10 IRE or more.
  • the separation distance between the camera unit 100 and the infrared light emitting diode unit 200 is 12 mm, it can be seen that they are 7.2, 6.8, and 5.6 IRE. That is, when the separation distance is 12mm, it can be seen that the pupil brightness of the subject expresses black defined by the IEEE. Furthermore, when the separation distance between the camera unit 100 and the infrared light emitting diode unit 200 is 12 mm or more, it can be seen that the pupil brightness of the subject expresses black more clearly. Therefore, according to the experimental data, it can be said that the distance between the camera unit 100 and the infrared light emitting diode unit 200 is 12 mm before and after the critical significance.
  • the separation distance between the camera unit 100 and the infrared light emitting diode unit 200 is 12 mm or more, not only the brightness of the eyes of the subject but also the brightness of the subject and the surrounding environment, In contrast, the separation distance with a change in brightness within 15% corresponds to 36 mm. Therefore, when the separation distance between the camera unit 100 and the infrared light emitting diode unit 200 is 12 mm to 36 mm, the white eye phenomenon may be removed and the shooting quality may be maintained.
  • the white neck phenomenon may be removed from the photographed subject.
  • FIG. 8 is a photograph of an actual photograph of a subject according to a directivity angle of infrared light emitted from the infrared light emitting diode unit of FIG. 1
  • FIG. 9 is a table for describing brightness of photographs according to the directivity angle of FIG. 8, and
  • FIG. 10. 9 is a graph for explaining the orientation angle of FIG. 9 and the brightness of photographs.
  • the photographing quality of the subject according to the center brightness and the ambient brightness of the pictures taken according to the directivity of the infrared light emitted by the infrared light emitting diode unit 200. was tested.
  • the infrared light emitting diode unit 200 emits infrared light having a wavelength band of 830 nm to 880 nm
  • 850 nm is set as a reference value
  • the camera unit 100 and the infrared light emitting diode unit was set to 12 mm as a reference value.
  • the minimum separation distance of 12mm to 36mm according to an embodiment of the present invention is set as a reference value Experiment.
  • the directivity angle of infrared light set 4 11.5, 16, 20, 28, 35 degree
  • the center brightness is defined as 50 IRE or more and the ambient brightness is defined as 25 IRE or more. This is based on the definition of the appropriate brightness of 50 IRE or more, based on the maximum brightness of 100 IRE, based on the analog video signal low light sensitivity characteristic of the IEEE.
  • the peripheral brightness is defined as 25 IRE or more because the subject can be expressed only when it is 25 IRE or more, which is half of the central brightness of the subject 50 IRE.
  • the center brightness and the ambient brightness of the photographed photograph at the directivity angle of the infrared light are shown.
  • the directivity angles are 4 degrees and 11.5 degrees
  • the center brightness is measured at 100 IRE and 96 IRE
  • the ambient brightness is It was measured from 7 IRE to 11 IRE. Therefore, when the directivity angles are 4 degrees and 11.5 degrees, it is possible to confirm that the photographing of the subject has degraded the photographing quality such that the central saturation of brightness occurs, making it difficult to identify the subject.
  • the orientation angle was 35 degrees
  • the central brightness was measured at 16 IRE and the ambient brightness was measured at 6 IRE to 10 IRE.
  • the orientation angle when the orientation angle is 35 degrees, it can be confirmed that the photographing of the subject is dark so that the photographing quality is deteriorated so that it is difficult to identify the subject.
  • the orientation angle when the orientation angle was 16 degrees to 28 degrees, the central brightness was measured at 56 IRE to 69 IRE and the ambient brightness was measured at 25 IRE to 30 IRE. Therefore, when the orientation angle is 16 degrees to 28 degrees, not only the central saturation phenomenon but also the overall dark phenomenon does not occur and it is confirmed that the photographing quality is excellent. Of course, the same result can be obtained when the photographs of the subjects are visually observed.
  • the directivity angle of the infrared light from the infrared light emitting diode unit 200 is 16 degrees to 28 degrees, the center brightness and the peripheral brightness of the photographed subject may be represented efficiently.
  • FIG. 11 is a diagram illustrating a case where a subject is photographed at night without lighting by using a conventional portable terminal and a portable terminal according to the present invention. That is, FIG. 11 is a diagram for comparing an image photographed at night using a portable terminal 600 having a camera module according to an embodiment of the present invention and an image photographed at night using an existing portable terminal 500. to be.
  • the image captured by the conventional portable terminal 500 may be degraded to such an extent that the subject can hardly be identified.
  • the image photographed by the mobile terminal 600 having the camera module according to the embodiment of the present invention exhibits an image quality that can accurately identify the shape of the subject. It can be seen that. Therefore, when there is little light or at night, when photographing a subject using the portable terminal 600 provided with the camera module according to an embodiment of the present invention, the result of photographs, images, etc. of which the photographing quality is significantly improved is obtained. You can get it.
  • the CIS camera used in the composite device detects the infrared light component included in the incident light so that the subject can be photographed in a place where there is no bright light or a place where there is no light or at night.
  • the infrared light emitting diode unit emits only infrared light having a wavelength band of 830 nm to 880 nm to photograph the subject, thereby reducing power consumption of the portable terminal and improving image quality of the captured image.
  • the infrared light emitting diode unit and the camera unit are disposed 12 mm or more apart, the white light phenomenon generated in the captured image may be removed to realize more clear image quality at night.

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Abstract

L'invention concerne un module caméra qui permet la visualisation, la photographie et la communication vidéo en conditions diurnes et nocturnes au moyen d'une diode infrarouge (IRED), ainsi qu'une plate-forme portable. Le module caméra et la plate-forme portable comportent une caméra, un élément IRED, un dispositif de commande et un émetteur. La caméra sert à photographier un sujet au moyen de la lumière infrarouge ou de la lumière visible et elle convertit les images en signaux électriques. L'élément IRED est disposé à au moins 12 mm de la caméra et il irradie de la lumière infrarouge d'une longueur d'ondes allant de 830 nm à 880 nm, à un angle directionnel de 16 à 18 degrés en direction du sujet. Le dispositif de commande transmet les signaux électriques de la caméra à un dispositif multifonctionnel externe et commande la caméra et l'élément IRED sur la base des signaux de commande émis par le dispositif multifonctionnel. L'émetteur répartit des signaux électriques entre la caméra, l'élément IRED et le dispositif de commande.
PCT/KR2009/000313 2008-01-29 2009-01-21 Module caméra à plate-forme portable WO2009096677A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR20080009149 2008-01-29
KR10-2008-0009149 2008-01-29
KR10-2008-0054595 2008-06-11
KR1020080054595A KR100866475B1 (ko) 2007-09-05 2008-06-11 카메라 모듈 및 이를 구비한 휴대형 단말기

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108685567A (zh) * 2018-06-06 2018-10-23 镇江市高等专科学校 一种基于3g网络的便携式多角度生命体征监测系统及方法

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