JP2013156557A - Photographing light irradiation device, information terminal device, and photographing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a photographing light irradiation device capable of applying light for accurately photographing a color tone of an image of a subject's face or the like, and to provide an information terminal device and a photographing method.SOLUTION: The photographing light irradiation device is superposedly disposed with a light guide plate for transmitting light, and a prism sheet for converting light so as to uniformize a tone with respect to a person, and includes, at an end face of the light guide plate, a light-emitting diode element and a wavelength conversion member for converting the wavelength of the light emitted from the light-emitting diode element. The irradiation device further includes a light source that exits light having such color rendering properties that all rendering indices from R1 to R15 are within a range of 80-100, the color rendering indices being defined in Japanese Industrial Standards (JIS) Z 8726. The information terminal device having the photographing light irradiation device attached thereto and a photographing method using the photographing light irradiation device are also provided.

Description

  The present invention relates to an imaging light irradiation apparatus, an information terminal apparatus, and an imaging method for irradiating a person who is an imaging subject with light.

  In recent years, a makeup simulation system that captures consumer face images, captures the captured face images into a computer, performs a simulation of applying makeup to the face image, and outputs the results, while providing advice to consumers It attracts attention because it can appropriately introduce cosmetics preferred by consumers (Patent Document 1). In such a simulation system, it is important to accurately capture the color of the face image of the subject, such as the skin color, but it is only possible to irradiate light from above, such as lighting installed on the ceiling. There were drawbacks such as shadows around the face and face lines. Also, depending on the light irradiated, it looks different from the color when seen under sunlight, so even if simulated based on an image taken with such light, it shows an image that shows the makeup finish There was a case that could not be referred. Furthermore, since the light irradiation device for photographing a face that has been developed so far is relatively large (Patent Document 2), it has been difficult to install it in a store with limited space.

  On the other hand, the simulation system has been reduced in size year by year, such as being stored in a tablet computer, and has been improved to have a photographing function and can be easily carried and used anywhere. For this reason, the light irradiation apparatus can be placed in a limited space in a store, and a small-sized one that can be carried with a simulation system is desired.

  Although there is a strobe used for photography as a small lighting device used for photographing, the strobe shoots the subject's face with the pupil open, depending on the photographing conditions, because it irradiates with strong light for a short irradiation time. Therefore, the retina of the eyeball in which many blood vessels are present is photographed, resulting in a face image called a so-called red-eye phenomenon, which cannot be used in the simulation system.

  Therefore, it is possible to irradiate light for accurately photographing a subject's face image, and furthermore, it is a small size that is easy to carry and can irradiate light for a long time only by charging. Development of an apparatus and a photographing method is desired.

JP 2011-22733 A JP 2010-97126 A

  An object of the present invention is to provide a photographing light irradiation device, an information terminal device, and a photographing method capable of irradiating light for accurately photographing the color of an image of a subject's face or the like.

  As a result of studies by the present inventors to solve the above-described problems, a light guide plate that transmits light and a prism sheet that converts light into light that is uniform in color with respect to a person are arranged to overlap each other, and a light-emitting diode element is formed. By irradiating the end face of the light guide plate with light having a large color rendering effect as a light source, the light incident on the inside of the light guide plate causes the surface of the prism sheet to emit light and irradiate the person with light. It is found that an image suitable for a simulation system can be obtained by photographing, that is, a photographed image in which the color of the skin of a person to be a subject is photographed under sunlight and no significant gap is generated, and the present invention is completed. It came to.

  That is, the present invention is a light irradiation apparatus for irradiating light to at least a part of a person who is a subject of photographing, and converts the light into a light guide plate that transmits light and light that has a uniform color for the person. By arranging the prism sheets so as to overlap each other and arranging the light source on the end face of the light guide plate, the light incident from the end face of the light guide plate is transmitted through the light guide plate and the surface of the prism sheet is surface-emitted. In a photographing light irradiation apparatus for irradiating at least a part of a person, the light source includes a light emitting diode element and a wavelength conversion member for converting the wavelength of light emitted from the light emitting diode element. (JIS) In the color rendering properties evaluation defined in Z8726 (1990), light having color rendering properties within the range of 80 to 100 in any of R1 to R15 is emitted. This is a photographing light irradiation device.

  The “person” referred to in the present invention includes not only the whole body of the human body but also a part of the human body. For example, when the subject is a makeup simulation subject that applies makeup to the face, “face” is a subject to be photographed, and when the subject is a subject subject to simulation that applies nail art to a nail, “hand” is a subject subject to photography. Of course, when the subject is a simulation subject for changing clothes, “whole body” is a subject to be photographed. In addition, “converting to light with uniform color” means that the light emitted from the light emitting diode element that is a point light source is converted into uniform surface light whose color unevenness is difficult to visually recognize. It is not limited to the light emission form such as condensed light, diffused light, and parallel light.

  Furthermore, the present invention is a photographic light irradiation device characterized in that a plurality of the light sources are arranged along opposing end surfaces of the light guide plate, and light from each light source is incident from the end surface of the light guide plate. .

  Furthermore, the present invention is a photographic light irradiation apparatus characterized in that the illuminance of irradiated light is 100 to 150 lx (lux) at a position 60 cm away.

  Furthermore, the present invention is a photographic light irradiation apparatus characterized in that the color temperature of light to be irradiated is 4500 to 5500 K (Kelvin).

  Furthermore, the present invention is a photographic light irradiation device in which the two prism sheets are arranged so as to overlap each other so that grooves having a substantially V-shaped cross section on the sheet surface forming the prism are orthogonal to each other.

In addition, the present invention is a photographing light irradiation device characterized by further comprising attachment means for attaching to an information terminal device having photographing means capable of photographing at least a part of a person.
For example, the attachment means attaches the main body of the photographing light irradiation device to the information terminal device so that the photographing direction of the photographing means of the information terminal device and the irradiation direction of the photographing light irradiation device are substantially the same direction. If it is the light irradiation apparatus for imaging | photography characterized by being attached so that it may be attached to, it becomes possible to concentrate and irradiate the light with a big color rendering effect in the imaging | photography range of a to-be-photographed object.
Further, by providing the photographing light irradiation device in the vicinity of the photographing means, there is an advantage that it is not greatly affected by outside light such as an indoor lamp having a relatively small color rendering effect.

  Furthermore, the present invention is an information terminal device comprising the photographing light irradiation device and photographing means capable of photographing at least a part of a person.

  Further, the present invention is a photographing method characterized in that photographing is performed while irradiating light to a person as a subject using the photographing light irradiation device.

  Further, the present invention provides a photographing method characterized in that the photographing light irradiation device is turned on, photographing is performed within the time when the person who is the subject of photographing is irradiated with light, and the photographing light irradiation device is turned off after photographing. It is.

  According to the light irradiation device of the present invention, by irradiating the subject with uniform light obtained by causing the prism sheet to emit light, an image of the subject without a shadow or the like can be taken. If used, an accurate make-up simulation can be performed.

  In addition, by using a light emitting device having a high color rendering effect as a light source, an image similar to that obtained when shooting under sunlight can be obtained. If a makeup simulation is performed using such an image, the same evaluation as when the makeup finish is confirmed under sunlight can be performed.

  Since it can be made small and easy to carry, it can be carried with a portable simulation system.

  Since the light emitting diode element is used as a light source, light irradiation for a long time is possible only by charging while being a small size.

External view of photographing light irradiation device ((a) front view, (b) rear view, (c) perspective view) The figure which shows the structure of the light irradiation apparatus for imaging | photography AA line cross-sectional view of the light irradiation device for photographing Schematic diagram with two prism sheets Structure diagram of light emitting device The figure which shows the makeup simulation apparatus which attached the light irradiation apparatus for imaging | photography (1st embodiment figure) ((a) Front view, (b) Back view) The figure which shows the makeup simulation apparatus incorporating the light irradiation apparatus for imaging | photography (2nd embodiment figure) ((a) Front view, (b) Back view) The figure which shows the makeup simulation apparatus which attached the light irradiation apparatus for imaging | photography (3rd embodiment figure) ((a) Front view, (b) Back view) The figure which shows the makeup simulation apparatus incorporating the light irradiation apparatus for imaging | photography (4th embodiment figure) ((a) Front view, (b) Back view)

  The photographing light irradiation apparatus of the present invention will be described in detail below.

  As shown in FIG. 1, the photographing light irradiation device (1) includes an irradiation window (3) for irradiating light on the front surface and a switch button (4) for turning on the device, and on the back surface. A bottom plate (5) provided with a locking projection (6) as an attaching means is attached. When the switch button (4) is pressed, the circuit inside the main body is conducted and light is emitted from the irradiation window (3). The locking projection (6) is for joining the photographing light irradiation device (1) to the photographing device. If the photographing light irradiation device (1) is joined to the photographing device, the photographing device is held in the hand. Thus, even when a photographer alone shoots a subject, the photographing light irradiation device (1) can be appropriately pointed at the subject. In particular, if a locking recess is provided in a small-sized tablet computer having a shooting function, the locking projection (6) can be fitted to attach the shooting light irradiation device (1), and shooting can be performed easily. At the same time, the photographed image can be directly taken into the computer.

  The main body (2) of the photographing light irradiation device has a concave shape with the bottom surface as an opening surface, and various members are accommodated in the concave portion (2a). As shown in FIG. 2, inside the main body (2), there is a light guide plate (10) that transmits light, and light on the upper surface of the light guide plate (10) is converted into light that is uniform in color to humans. For this purpose, two prism sheets (9) (prism sheet A (9a) and prism sheet B (9b)) are arranged in an overlapping manner. Further, a window plate (8) is disposed on the upper surface of the prism sheet A (9a) to prevent the upper surface of the prism sheet A (9a) from being scratched or soiled. A light emitting device (7) incorporating a light emitting diode element (7a) for irradiating light to the end face (10a) of the light guide plate (10) is installed on the inner peripheral side wall surface of the recess (2a). . After all these members are stored inside the main body, the bottom plate (5) is attached to the opening of the recess (2a) and closes the bottom of the main body.

  A plurality of light emitting diode elements (7a) are arranged along the opposing end faces of the light guide plate (10) (FIG. 2). And the light irradiated from a light emitting diode element (7a) injects into the inside of a light-guide plate from the end surface (10a) of a light-guide plate (10). The light incident on the inside of the light guide plate (10) propagates inside the light guide plate and is emitted from the upper surface (light emitting surface) (10b) toward the prism sheet (9) (FIG. 3).

  By arranging a plurality of light emitting diode elements (7a) along the end face (10a), the intensity of light emitted from the irradiation window (3) can be increased, and the light emitted from the irradiation window can be applied to the entire subject. It can be a uniform light to illuminate. The light emitting diode element can be attached, for example, by attaching an LED board having a plurality of light emitting diode elements on a printed circuit board to the inner peripheral side wall surface of the container recess, so that the work can be performed efficiently and from the viewpoint of productivity. To preferred. In FIG. 2, a total of 24 light-emitting diode elements are arranged, 12 on each side, along the opposing end surfaces of the light guide plate.

  The light guide plate (10) diffuses the light emitted from the light emitting diode element (7a) over a wide area by propagating inside the light guide plate, and from the upper surface (light emitting surface) (10b) of the light guide plate to the prism sheet ( The light is emitted toward 9). Therefore, the light guide plate is preferably made of a material having high light transmittance, and is made of, for example, an organic resin such as acrylic resin or polycarbonate resin, a glass substrate, or the like.

  A prism sheet (9) is disposed on the upper surface (light emitting surface) (10b) of the light guide plate (10). The prism sheet (9) plays a role of adjusting the traveling direction of light emitted from the upper surface of the light guide plate. The prism sheet is a light-transmitting optical member, and a plurality of substantially V-shaped grooves extending in one direction are formed on the surface to form a prism, and a cross section perpendicular to the extending direction is a saw blade. In general, a prism is formed by arranging a plurality of semicircular or semi-elliptical optical structures on a sheet-like base material continuously. The prism sheet (9) has an effect of improving the diffusibility of the light emitted from the light guide plate and improving the uniformity of the color unevenness on the sheet surface.

  As shown in FIG. 4, the plurality of prisms formed on the surface of the prism sheet B (9b) extend in the long side direction of the light guide plate (10), and the traveling direction of light taken into the light guide plate from the light source Are lined up at right angles. The prism sheet A (9a) extends in the short side direction of the light guide plate (10), and the prism sheet A (9a) and the prism sheet B (9b) are arranged so that the prisms are orthogonal to each other. By arranging in this way, light emitted from the light emitting diode element can be converted into uniform light emitted from a wide surface. The prism sheets A and B are arranged so that the apex angles of the respective prisms do not face the light exit surface (10b) of the light guide plate (10). The arrangement order of these two prism sheets A and B is not particularly limited. Further, here, two prism sheets A and B in which a plurality of triangular prisms are arranged on a transparent resin sheet are used, but instead of the two prism sheets A and B, an optical element similar to a prism is used. Regularly arranged sheets may be used. In addition, a sheet having regularly provided optical elements such as a concave lens, a convex lens, a lenticular lens, and a pyramid type can be used instead of the prism sheet.

  The light source is a light-emitting device formed by combining a light-emitting diode element and a wavelength conversion member, and the color rendering properties of the light emitted from the light-emitting device are defined in Japanese Industrial Standard (JIS) Z8726 (1990). It preferably has a color rendering property within the range of 80 to 100. By using such a light source having excellent color rendering properties, an image suitable for makeup simulation can be obtained.

  The color rendering property indicates the color reproducibility by a light source. As a method for evaluating the color rendering property, Japanese Industrial Standard (JIS) Z8726 (1990) is available. The color rendering index can be expressed numerically with the color rendering index. The color rendering index is based on a comparison with the reference light defined in the Japanese Industrial Standard (here, the light that approximates sunlight is used as the reference light). The color shift generated when the light source to be measured illuminates the color chart for color rendering evaluation is expressed as an index. The color chart includes a total of 15 colors composed of standard eight colors R1 to R8 and special colors R9 to R15. The color difference between the color chart illuminated with the light source to be measured and the color chart irradiated with the reference light is evaluated. If there is no difference between them, the color rendering evaluation number is 100. Even if the color temperature of the light source is the same, the appearance of the color differs depending on the color rendering index, and if the color rendering index is low, the color is moved away from the color lit by sunlight. A light source having a uniform light density over the entire visible light region can be said to be a light source with good color rendering properties.

  A light emitting device comprising a combination of a light emitting diode element and a wavelength conversion member, for example, a gallium nitride compound semiconductor is formed on the inner bottom surface of a substrate (7d) formed in a concave shape with an insulating material having high thermal conductivity such as alumina or aluminum nitride. An n-type layer, a light-emitting layer, and a p-type layer are stacked in this order, and a light-emitting diode element (7a) that emits blue light, violet light, or ultraviolet light is installed. Covered with a light-transmitting substrate (7c) made of a material having high heat conductivity such as diamond and having excellent light-transmitting properties, and the red, green, blue, and yellow phosphors are covered on the light-transmitting substrate. The wavelength conversion member (7b) containing the phosphor (7e) is laminated (FIG. 5). By adjusting the type and content of the phosphor (7e) contained in the wavelength conversion member (7b), the mixed light emitted from the light emitting device (7) has a color rendering property very close to sunlight moving on the Planck locus. Excellent irradiation light can be obtained. The structure and manufacturing method of the light emitting device are described in Japanese Patent Application Laid-Open Nos. 2005-191197, 2011-35198, and the like.

  Commercially available products can be used for light-emitting devices having color rendering properties in which R1 to R15 have an evaluation number in the range of 80 to 100 in the color rendering evaluation defined in Japanese Industrial Standard (JIS) Z8726 (1990).

  The light emitted from the photographing light irradiation device preferably has an illuminance of 100 to 150 lx (lux) at a position 60 cm away from the device. The illuminance indicates the amount of light flux incident per unit area, and is an index indicating the brightness of light applied to the subject. This is because if the illuminance at a position 60 cm away is smaller than 100 lx, the photographed image has a dark skin color, and if it is larger than 150 lx, the skin color becomes too bright.

  The light emitted from the photographing light irradiation device preferably has a color temperature of 4500 to 5500 K (Kelvin). The color temperature corresponds to the color of light to be expressed with the color of light emitted from a black body at a certain temperature (high heat), and the temperature of the black body at that time is used as the color temperature. It is an important factor for accurate reproduction. This is because if the color temperature is lower than 4500K, the skin color becomes reddish, and if it exceeds 5500K, the skin color becomes pale, and post-processing such as color correction is required for the photographed image.

  The photographing light irradiation device can irradiate the entire subject with light optimal for human photographing while suppressing power consumption by using a light emitting diode element as a light source and arranging a light guide plate and a prism sheet so as to overlap each other. As a result, the photographing light irradiation device can be miniaturized and can be irradiated for a long time only by charging with a battery. For this reason, if the photographing light irradiation device is turned on, the face is photographed within the time during which the face to be photographed is irradiated with light, and the photographing light irradiation device is turned off after photographing, the pupil is taken into account. Since the subject's face is not photographed in the open state and the face image is not so-called red-eye, an image suitable for makeup simulation can be obtained.

  6 to 9 show examples in which the photographing irradiation apparatus of the present invention is attached to or built in a makeup simulation apparatus as an information terminal apparatus. Here, the makeup simulation apparatus captures the face of the subject with a built-in camera, stores the captured image in a computer, and simulates a face image subjected to various makeups by image analysis on the liquid crystal screen. It is disclosed (Japanese Unexamined Patent Application Publication Nos. 2009-39523 and 2010-179012). 6 to 9 exemplify a small-sized tablet computer as a makeup simulation apparatus, but a stationary large-sized computer as described in Japanese Patent Application Laid-Open No. 2009-39523 and Japanese Patent Application Laid-Open No. 2010-179012. It may be.

  6 and 7 show that the subject (14) and the light are irradiated side by side on the liquid crystal screen (15) so that the subject can take a picture while confirming his / her face image projected on the liquid crystal screen (15). The light emitting surface (13) is arranged in the vicinity of the camera (14), and the light emitting surface (13) emits light when the switch button (12) is pressed. FIG. 6 exemplifies a makeup simulation apparatus (11) equipped with a photographing light irradiation apparatus (1), and FIG. 7 shows a makeup simulation apparatus (11) incorporating the photographing light irradiation apparatus (1). This is just an example.

  FIGS. 8 and 9 are suitable for photographing a person other than the subject, for example, a beauty consultant pointing the camera at the subject and confirming the liquid crystal screen by a person other than the subject. The liquid crystal screen (15) On the opposite side, a camera (14) and a light emitting surface (13) for irradiating light are arranged in the vicinity of the camera (14), and the light emitting surface (13) is a switch button as in the examples of FIGS. Press (12) to emit light. FIG. 8 illustrates a makeup simulation apparatus (11) to which a photographing light irradiation apparatus (1) is attached, and FIG. 9 illustrates a makeup simulation apparatus (11) incorporating the photographing light irradiation apparatus (1). This is just an example.

DESCRIPTION OF SYMBOLS 1 Image | photographing light irradiation apparatus 2 Main body 2a Recessed part 3 Irradiation window 4 Switch button 5 Bottom plate 6 Locking protrusion 7 Light emitting device 7a Light emitting diode element 7b Wavelength conversion member 7c Translucent substrate 7d Base body 7e Phosphor 8 Window plate 9 Prism sheet 9a Prism sheet A
9b Prism sheet B
DESCRIPTION OF SYMBOLS 10 Light-guide plate 10a End surface 10b Light-projection surface 11 Makeup simulation apparatus 12 Switch button 13 Light emission surface 14 Camera 15 Liquid crystal screen

Claims (9)

  A light irradiating device for irradiating light to at least a part of a person who is a subject of photographing, wherein a light guide plate that transmits light and a prism sheet that converts light into a color that is uniform to the person are overlapped And arranging a light source on the end face of the light guide plate, so that light incident from the end face of the light guide plate is transmitted through the light guide plate and causes the surface of the prism sheet to emit light to at least a part of a person. In the light irradiation device for photographing that irradiates light, the light source includes a light emitting diode element and a wavelength conversion member for converting the wavelength of light emitted from the light emitting diode element, and is Japanese Industrial Standard (JIS) Z8726 ( (1990), the light emission for photographing is characterized by emitting light having color rendering properties within the range of 80 to 100 in the evaluation numbers of R1 to R15. apparatus.   The photographing light irradiation apparatus according to claim 1, wherein a plurality of the light sources are arranged along opposite end surfaces of the light guide plate, and light from each of the light sources is incident from an end surface of the light guide plate.   The illuminating light irradiation apparatus according to claim 1 or 2, wherein the illuminance of the irradiated light is 100 to 150 lx (lux) at a position 60 cm away.   The color light temperature of the light to irradiate is 4500-5500K (Kelvin), The light irradiation apparatus for imaging | photography in any one of Claim 1 thru | or 3 characterized by the above-mentioned.   5. The photographing apparatus according to claim 1, wherein the two prism sheets are stacked so that grooves having a substantially V-shaped cross section on a sheet surface forming the prism are orthogonal to each other. Light irradiation device.   6. The photographing light irradiation device according to claim 1, further comprising attachment means for attaching to an information terminal device having photographing means capable of photographing at least a part of a person.   7. An information terminal device comprising: the photographing light irradiation device according to claim 1; and photographing means capable of photographing at least a part of a person.   7. An imaging method, wherein the imaging light irradiation device according to claim 1 is used to perform imaging while irradiating light to a person who is a subject.   9. The photographing method according to claim 8, wherein the photographing light irradiation device is turned on, the photographing is performed within a time during which the person who is the photographing subject is irradiated with light, and the photographing light irradiation device is turned off after the photographing. .

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