JP2014026093A - Illuminating device and display unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illuminating device and a display unit capable of reducing tiredness of a viewer viewing the display unit.SOLUTION: The illuminating device includes: a light source section 21; a sensor section 1 that detects the brightness of a display unit 100a or an area adjacent to an outer frame of the display unit 100a; and a controller 3 that gradually reduces the brightness in the area adjacent to the display unit 100a from the brightness detected by the sensor section 1 to the brightness that the viewer cannot perceive the light as separating away from the outer frame of the display unit 100a. The controller 3 controls the display unit 100a to change the brightness such that a viewer P cannot perceive the light from the outer frame of the display unit 100a in a range from an induced visual field to an auxiliary visual field of the viewer P.

Description

  The present invention relates to a lighting device that emits light and a display device that has a function of lighting.

  Patent Document 1 below describes an ambient illumination type display device having an illumination light presenting unit in which brightness and hue are controlled around the image display unit in accordance with the content reproduced by the image display unit.

Japanese Patent Laid-Open No. 54-102828

  Since the peripheral illumination type display device described in Patent Document 1 uniformly illuminates the vicinity and the peripheral part of the display unit, the visual field range of the viewer at the optimal viewing position is not taken into consideration. For this reason, the viewer's field of view includes the edge of the illumination light. For this reason, the peripheral illumination type display device disclosed in Patent Document 1 has a problem that an observer who views an image tends to get tired.

  Therefore, the present invention has been proposed in view of the above-described circumstances, and an object thereof is to provide an illumination device and a display device that can reduce the fatigue of an observer who views the display unit.

  The illumination device according to the first aspect of the present invention includes an illumination unit, a display unit of the display device or a detection unit that detects luminance near the outer frame of the display unit, and luminance around the display unit of the display device. As the distance from the outer frame of the display unit of the display device increases, the luminance gradually decreases from the luminance detected by the detection unit to a luminance at which the observer cannot perceive light, and from the outer frame of the display unit of the display device, And a control unit that controls the illuminating unit so as to have a luminance that the observer cannot perceive light within the range up to the auxiliary visual field.

  An illumination device according to a second aspect of the present invention is the illumination device according to the first aspect, wherein the control unit controls the illumination unit so that the equiluminance range is an elliptical shape. .

  The illumination device according to a third aspect of the present invention is the illumination device according to the first or second aspect, wherein the control unit calculates a chromaticity near an outer frame of the display unit. The illumination unit is controlled so as to match the chromaticity.

  An illumination device according to a fourth aspect of the present invention is the illumination device according to any one of the first to third aspects, wherein the illumination unit irradiates the periphery of the display unit with indirect light. And

  An illumination device according to a fifth aspect of the present invention is the illumination device according to any one of the first to fourth aspects, wherein the control unit sets the luminance around the display unit to a predetermined upper limit value or less. It is characterized by limiting.

  The illumination device according to a sixth aspect of the present invention is the illumination device according to any one of the first to fifth aspects, wherein the control unit does not irradiate the display unit of the display device with light. It is characterized by doing so.

  An illumination device according to a seventh aspect of the present invention is the illumination device according to any one of the first to sixth aspects, wherein the detection unit is near the display unit of the display device or the outer frame of the display unit. It is the imaging device which images.

  A display device according to an eighth aspect of the present invention includes a display unit that displays an image, an illumination unit, a detection unit that detects luminance near the display unit or an outer frame of the display unit, and a display of the display device The brightness in the periphery of the display unit is gradually reduced from the brightness detected by the detection unit to a brightness at which the observer cannot perceive light, and the observer can detect within the range from the outer frame of the display unit to the observer's guiding visual field to the auxiliary visual field. And a control unit that controls the illumination unit so as to make the luminance incapable of perceiving light.

  According to the present invention, the luminance in the periphery of the display unit is gradually decreased as the distance from the outer frame of the display unit of the display device increases. Therefore, it is possible to suppress the difference in brightness between the display unit and its surroundings, and to reduce the fatigue of the observer who sees the display unit.

It is a front view which shows schematic structure of the illuminating device shown as embodiment of this invention. It is sectional drawing which shows the structure of the illuminating device shown as embodiment of this invention. It is sectional drawing which shows the other structure of the illuminating device shown as embodiment of this invention. It is a front view explaining the brightness | luminance change made an observer perceive with the illuminating device shown as embodiment of this invention. It is a front view explaining the brightness | luminance change made an observer perceive with the illuminating device shown as embodiment of this invention. It is a figure which shows the visual field characteristic of an observer. It is a front view which shows an example of the illumination light which an observer perceives with the illuminating device shown as embodiment of this invention. It is a front view which shows an example of the illumination light which an observer perceives with the illuminating device shown as embodiment of this invention. It is a front view which shows an example of the illumination light which an observer perceives with the illuminating device shown as embodiment of this invention. It is a front view which shows an example of the illumination light which an observer perceives with the illuminating device shown as embodiment of this invention. It is a front view which shows an example of the illumination light which an observer perceives with the illuminating device shown as embodiment of this invention. It is a front view which shows an example of the illumination light which an observer perceives with the illuminating device shown as embodiment of this invention. It is sectional drawing which shows the structure provided with the lens in the illuminating device shown as embodiment of this invention. It is sectional drawing which shows the other structure provided with the lens in the illuminating device shown as embodiment of this invention. It is sectional drawing which shows the structure which curved the light diffusing plate in the illuminating device shown as embodiment of this invention. It is sectional drawing which shows the structure which curved the screen in the illuminating device shown as embodiment of this invention. It is sectional drawing which shows the structure which utilizes indirect light in the illuminating device shown as embodiment of this invention. It is sectional drawing which shows the other structure which utilizes indirect light in the illuminating device shown as embodiment of this invention. It is sectional drawing which shows the structure provided with the camera in the illuminating device shown as embodiment of this invention. It is sectional drawing which shows the other structure provided with the camera in the illuminating device shown as embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, for example, the illumination device shown as an embodiment of the present invention irradiates illumination light L to the periphery of a display 100 as a display device by a peripheral illumination unit 2. In particular, the illumination device gradually (smoothly) decreases the luminance in the ambient illumination unit 2 illuminated by the illumination light L as it moves away from the display 100. That is, the lighting device changes the brightness of the peripheral illumination unit 2 smoothly, not sharply. This reduces the feeling of burden on the eyes due to the difference in brightness between the display 100 and the background within the field of view S of the observer. This illuminating device can perform appropriate illumination for reducing eye fatigue around the display 100 included in the peripheral visual field of the observer. Further, the lighting device can reduce power consumption due to lighting in the entire room where the display 100 is installed.

  Needless to say, the display 100 can be applied to various devices such as a large-screen TV for living room, a monitor for a personal computer on a desk, and a viewfinder of a video camera. Further, the display 100, the ambient illumination unit 2, and the controller 3 may be separate as shown in FIG. 2 or the like, or may be an integrated display device.

  This illuminating device is configured as shown in FIG. 2 or FIG. 3, for example. The illumination device shown in FIG. 2 includes a sensor unit 1 as a detection unit, an ambient illumination unit 2, and a controller 3 as a control unit. FIG. 2 is a cross-sectional view of the display 100 and the ambient illumination unit 2, and the display 100 and the ambient illumination unit 2 are viewed from the side.

  The illuminating device shown in FIG. 2 has a configuration in which the illumination light L is irradiated and the illumination light L is perceived through the light diffusion plate 24.

  The sensor unit 1 detects a luminance near the outer frame near the display unit 100a or the display unit 100a in the display 100. In this example, the sensor unit 1 is installed at the upper end of the display 100. For example, the sensor unit 1 detects the luminance of an area having a width that allows the luminance to be sufficiently recognized within a range that can be identified with a visual angle of about 1 degree from the outer edge of the display 100 with a visual acuity of 0.02. The sensor unit 1 supplies the detected luminance to the controller 3 as a sensor signal. Note that the sensor unit 1 may detect the luminance of the display unit 100a of the display 100 instead of the vicinity of the outer frame of the display unit 100a. The sensor unit 1 may detect not only luminance but also color, or may detect either luminance or color.

  As shown in FIG. 4 or FIG. 5, the ambient illumination unit 2 gradually decreases the luminance perceived by the observer P by the illumination light L as it moves away from the outer frame of the display 100. La, Lb, Lc, and Ld in FIGS. 4 and 5 are isoluminance lines. As shown in FIGS. 4 and 5, the ambient illumination unit 2 lowers the luminance perceived by the observer P on the light diffusion plate 24 as the luminance La, Lb, Lc, and Ld is reached.

  In particular, the peripheral illumination unit 2 observes the luminance perceived by the observer P on the light diffusion plate 24 around the display unit 100a from the luminance detected by the sensor unit 1 as the distance from the outer frame of the display unit 100a increases. The brightness is gradually lowered to a level at which the person P cannot perceive light. In addition, the ambient illumination unit 2 sets the brightness such that the observer P cannot perceive light within the range from the observer P's guiding visual field to the auxiliary visual field.

  As shown in FIG. 4, the ambient illumination unit 2 may gradually reduce the luminance perceived by the observer P based on the overall luminance of the display 100. Alternatively, as shown in FIG. 5, the ambient illumination unit 2 may change the isoluminance line based on the detection result of the sensor unit 1 according to the presence of the high-luminance display unit 100 c.

  As shown in FIG. 2, the ambient illumination unit 2 includes an upper part 2A and a lower part 2B, and is provided so as to surround the display unit 100a of the display 100 as shown in FIG. The ambient illumination unit 2 includes a light source unit 21, a light shielding plate 22, a light shielding plate 23, and a light diffusion plate 24 as an illumination unit. In addition, in FIG. 2, although the light source part 21 is shown separately by the upper part 2A and the lower part 2B, of course, the light source part 21 may be further provided. In addition, the ambient illumination unit 2 may include other optical components such as a reflector that adjusts the light distribution from the light source unit 21.

  The light source unit 21 emits the illumination light L toward the light diffusing plate 24. For example, a plurality of light source units 21 are arranged along the outer frame of the display unit 100a, and constitute a light source unit having a light emitting surface linearly formed. Light intensity and color of the light source unit 21 are controlled according to the control of the controller 3. FIG. 2 shows a configuration example in which a single light source unit 21 is arranged at a plurality of locations, but it goes without saying that the light source units 21 may be arranged in multiple locations at one location.

  The light diffusion plate 24 diffuses the illumination light L emitted from the light source unit 21. The light diffusing plate 24 is set to have a transmittance so that the luminance perceived by the observer P decreases smoothly as the distance from the display unit 100a increases. That is, the light diffusion plate 24 has a uniform transmittance according to the intensity of the illumination light L.

  As shown in FIG. 1, the light diffusion plate 24 is disposed so as to surround the display unit 100 a of the display 100. The light diffusing plate 24 has an area in consideration of the visual field characteristics of the observer P. The light diffusing plate 24 has a size including a part of the guide visual field or the auxiliary visual field of the observer P at the viewpoint position where the observer P is facing the display 100 away from the display 100 by a predetermined distance.

  In addition, the light diffusing plate 24 may have a characteristic that suppresses a short wavelength component that is considered to have a large influence on the living body in order to reduce the burden on the eyes.

  When viewing the display unit 100a from the viewpoint of the observer P, if the illumination light L is reflected on the display unit 100a, the comfort of viewing the image is impaired. In order to reduce this reflection, an antireflection filter may be superimposed on the display unit 100a, or the light distribution state of the illumination light L may be adjusted. Furthermore, when the reflection of the illumination light L on the display unit 100a can be detected by the sensor unit 1, the controller 3 may adjust the intensity of the illumination light L or the like so as to reduce the reflection of the illumination light L.

  Next, the relationship between the visual field characteristics of the observer P and the peripheral illumination unit 2 will be described.

  The observer P (human) has a visual field characteristic as shown in FIG. The visual field of the observer P is roughly classified into five. (A) in the figure is a discrimination visual field in which a large number of photoreceptor cells (especially cone cells) are distributed in the fovea on the retina and the visual functions such as visual acuity and color discrimination are the best. This discrimination field of view is within a few degrees. (B) is an effective visual field in which a target can be captured only by eye movement and a target target can be received from noise. This effective field of view is within a range of about 15 degrees to the left, right, about 8 degrees up, and about 12 degrees down. (C) is a gaze stable visual field in which the subject can be glanced easily by the movement of the head. This gaze stable visual field ranges from 30 to 45 degrees on the left and right, 20 to 30 degrees on the upper side, and 25 to 40 degrees on the lower side. (D) is a guidance visual field that can determine only the presence of the presented object and affect human space coordinate sense. This guidance field is in the range of 30-100 degrees horizontally and 20-85 degrees vertically. (E) is an auxiliary visual field that works to such an extent that perception of the presented object is extremely reduced and a gaze action is induced by a strong stimulus or the like. This auxiliary field of view is in the range of 100 to 200 degrees horizontally and 85 to 135 degrees vertically.

  In such a visual field range of the observer P, the lighting device reduces the luminance to a level at which the observer P cannot perceive light within the range from the outer frame of the display unit 100a to the observer P's guiding visual field to the auxiliary visual field. The adjustment of the luminance perceived by the observer P can be realized by adjusting the intensity of the illumination light L with the arrangement of the light source unit 21 and the light diffusion plate 24 and the illumination device. Accordingly, the ambient illuminator 2 is larger than the guiding visual field and includes at least a part of the auxiliary visual field when the observer P is at a predetermined distance from the display unit 100a. Have The predetermined distance is desirably set longer as the size of the display unit 100a is larger, for example.

  The controller 3 functions as a control unit that controls to drive the light source unit 21. The controller 3 is supplied with a sensor signal from the sensor unit 1. The controller 3 adjusts the intensity of the illumination light L emitted from the light source unit 21 based on the luminance indicated by the sensor signal. The controller 3 sets the luminance on the light diffusion plate 24 adjacent to the outer edge of the display unit 100a by using at least one value of luminance or chromaticity of the display unit 100a or the peripheral portion of the display unit 100a. do it.

  The controller 3 makes the luminance at the position of the light diffusion plate 24 adjacent to the outer frame of the display unit 100a equal to or less than the luminance of the display unit 100a. Further, the controller 3 gradually decreases the luminance on the light diffusion plate 24 around the display unit 100a from the luminance detected by the sensor unit 1 to the luminance at which the observer P cannot perceive light. The controller 3 makes the brightness such that the observer P cannot perceive light within the range of the guidance visual field to the auxiliary visual field.

  It is desirable that the controller 3 smoothly changes the luminance perceived by the observer P. Here, it is known that the amount of human sense is perceived in proportion to the logarithm of the stimulus. Therefore, it is desirable for the controller 3 to continuously reduce the luminance at a rate that is equal to or more gradual than an exponential function that is perceived as a linear decrease sensuously.

  Furthermore, the controller 3 desirably limits the luminance on the light diffusion plate 24 around the display unit 100a to a predetermined upper limit value or less. If the luminance on the light diffusing plate 24 is increased to the same level when the luminance of the display unit 100a is too high, irritation to the eyes increases. Moreover, the power consumption required for illumination increases. In consideration of suppressing the irritation to the eyes, it is desirable to limit the maximum luminance on the light diffusion plate 24 to a predetermined upper limit value or less. For example, it is desirable to limit the maximum luminance on the light diffusing plate 24 to about 200 candela or less. Therefore, according to this illumination device, for example, even if the luminance detected by the sensor unit 1 exceeds 200 candela, the maximum luminance on the light diffusion plate 24 is restricted to 200 candela. Thereby, while suppressing irritation | stimulation to eyes, power consumption can be restrict | limited.

  Furthermore, in this lighting device, it is desirable that the controller 3 does not irradiate the display section of the display 100 with the illumination light L. Here, if there is a non-display portion (a wide frame) in the outer frame of the display unit 100a, the luminance difference from the display unit 100a increases. For this reason, the illumination light L is projected onto the non-display portion. The illumination device may avoid irradiating the display portion with the illumination light L by the arrangement of the light source unit 21. The lighting device may cover a non-display portion as an outer frame of the display unit 100a with the light diffusion plate 24. Thereby, even if there exists a non-display part of the display 100 between the display part 100a and the light diffusing plate 24, the illuminating device can suppress the feeling of burden on the eyes due to the non-display part.

  The controller 3 may decrease the luminance on the light diffusing plate 24 monotonously (linearly), or change it exponentially so that the observer P feels that the brightness is monotonously decreasing. May be.

  Further, the controller 3 may be configured such that changes in chromaticity and luminance of the peripheral illumination unit 2 are slow or unchanging even when the chromaticity and luminance of the display unit 100a change drastically. Thereby, the irritation | stimulation to the eye by perceiving the illumination light L of the surrounding illumination part 2 can be suppressed.

  2 or 3, when the sensor unit 1 detects the luminance near the display unit 100a or the outer frame of the display unit 100a, the controller 3 drives the light source unit 21 to irradiate the illumination light L. . The illumination light L emitted from the light source unit 21 is diffused by the light diffusion plate 24 and illuminates the viewer P side. In accordance with the distance and angle between the light source unit 21 and the light diffusing plate 24, the brightness on the light diffusing plate 24 due to the illumination light L decreases smoothly as the distance from the display unit 100a increases. As a result, the outer end of the light diffusing plate 24 has a luminance that is not perceived by the observer P, and is assimilated with the surrounding ambient light. The luminance on the light diffusion plate 24 in the vicinity of the display unit 100a is set so as to be a value close to the luminance of the display unit 100a with reference to the luminance value obtained from the sensor unit 1 by the controller 3.

  As a result, the illumination device perceives the same brightness as the display 100 in the vicinity of the outer frame of the display 100 as shown in FIGS. 1, 4, and 5. The illumination device smoothly reduces the luminance on the light diffusion plate 24 that is visually recognized by the illumination light L around the display 100. In addition, the illumination device reduces the luminance on the light diffusion plate 24 so that the illumination light L is not perceived by the observer P within the range from the observer's P guidance visual field to the auxiliary visual field.

  As described above, according to the illumination device, the luminance is gradually lowered from the outer frame of the display unit 100a, and the luminance is set such that the observer P cannot perceive light within the range from the guidance visual field to the auxiliary visual field. As a result, it is possible to reduce the feeling of burden on the eyes due to the difference in brightness between the display unit 100a and its surroundings. Therefore, according to this illuminating device, it is possible to reduce the fatigue of an observer who views the display unit 100a.

  Further, according to this lighting device, the brightness of the periphery of the display unit 100a is made equal to or lower than that of the display unit 100a, and the brightness of the surroundings is gradually reduced, so that the display unit 100a is viewed in a comfortable environment for the observer P. be able to.

  Furthermore, according to this illumination device, the power consumption for the illumination light L can be reduced without emitting the illumination light L over a wide range from the display unit 100a.

  The illumination device shown in FIG. 3 is different from the illumination device of FIG. 2 in that the light diffusing plate 24 is eliminated and a screen 25 is disposed instead of the light shielding plate 22. The screen 25 reflects the illumination light L emitted from the light source unit 21 to the viewer P side. Accordingly, the illumination device causes the observer P to perceive light around the display 100 by the illumination light L reflected by the screen 25. Even such an illuminating device can exhibit the same effect as the illuminating device of FIG.

  More specifically, the lighting device may adjust the luminance on the light diffusing plate 24 or the screen 25 as shown in FIGS. This illuminating device has a configuration in which a display 100 is arranged at the center in the drawing. For example, the display 100 is WUXGA (16:10, Wide Ultra XGA, Wide UXGA). In addition, the position of the observer P was set to 32 degrees horizontally from the display 100 (the 26-inch display 100 is viewed 1 m away). The distance between the viewpoint of the observer P and the display unit 100a is slightly different between 16: 9 (full high-definition) and 16:10 (WUXGA), but is approximately three times the vertical length of the display unit 100a as a display screen. In general, the viewing distance is optimal. Thereby, the display unit 100a covers the effective visual field (30 degrees × 20 degrees), and the peripheral illumination unit 2 covers the guiding visual field and at least a part of the auxiliary visual field.

  As illustrated in FIG. 7, the illumination device may resemble the shape of the illumination light L on the light diffusion plate 24 or the screen 25 with the outer shape of the display unit 100a. In addition, the illumination device may gradually decrease the luminance on the light diffusion plate 24 or the screen 25 according to, for example, γ2.2 so that it can be visually felt that the brightness is linearly decreased.

  As shown in FIG. 8, the illumination device may resemble the shape of the illumination light L on the light diffusing plate 24 or the screen 25 to the outer shape of the display unit 100a. Moreover, the illuminating device may reduce the luminance on the light diffusion plate 24 or the screen 25 linearly.

  As shown in FIG. 9, the illumination device may resemble the shape of the illumination light L on the light diffusing plate 24 or the screen 25 to an ellipse circumscribing the display unit 100a. In addition, the illumination device may gradually decrease the luminance on the light diffusion plate 24 or the screen 25 according to, for example, γ2.2 so that it can be visually felt that the brightness is linearly decreased.

  As shown in FIG. 10, the illumination device may resemble the shape of the illumination light L on the light diffusion plate 24 or the screen 25 to an ellipse circumscribing the display unit 100a. Moreover, the illuminating device may reduce the luminance on the light diffusion plate 24 or the screen 25 linearly.

  As shown in FIG. 11, the illumination device may resemble the shape of the illumination light L on the light diffusion plate 24 or the screen 25 to an ellipse inscribed in the display unit 100a. In addition, the illumination device may gradually decrease the luminance on the light diffusion plate 24 or the screen 25 according to, for example, γ2.2 so that it can be visually felt that the brightness is linearly decreased.

  As shown in FIG. 12, the illumination device may resemble the shape of the illumination light L on the light diffusion plate 24 or the screen 25 to an ellipse inscribed in the display unit 100a. Moreover, the illuminating device may reduce the luminance on the light diffusion plate 24 or the screen 25 linearly.

  By changing the luminance on the light diffusing plate 24 or the screen 25 as shown in FIGS. 7 to 12, the illuminating device can reduce the burden on the eyes of the observer P who sees the image. In addition, the lighting device linearly decreases the luminance on the light diffusion plate 24 or the screen 25 as shown in FIGS. 8, 10, and 12, rather than visually reducing the brightness linearly. It is possible to reduce the feeling of burden on the eyes in the vicinity of the display unit 100a. Further, the shape of the illumination light L on the light diffusing plate 24 or the screen 25 as shown in FIG. 7 or FIG. 8 is made elliptical as shown in FIGS. This can further reduce the sense of burden on the eyes.

  Furthermore, this illuminating device may have a configuration as shown in FIG. 13 or 14 in order to adjust the range in which the observer P perceives the illumination light L. These illuminating devices have lenses 26 (26A, 26B) for controlling the light distribution of the light emitted from the light source unit 21. The lens 26 distributes the illumination light L so that the illumination light L is perceived up to the auxiliary visual field of the observer P when the observer P views the display unit 100a from a predetermined viewpoint position. The lens 26 may be provided for each light source unit 21 or may be provided only for the specific light source unit 21 according to the position of the light source unit 21 or the like.

  Such an illuminating device can adjust the light distribution of the illumination light L by the lens 26, and can reduce the luminance so that the illumination light L is not perceived in the range from the guide visual field to the auxiliary visual field of the observer P. Therefore, according to this illuminating device, the brightness perceived by the observer P within the range from the observer P's guiding visual field to the auxiliary visual field can be sufficiently reduced. Further, according to this illumination device, the luminance is reduced to the extent that it is not perceived within the range from the guidance visual field to the auxiliary visual field, so that the luminous flux of the illumination light L can be suppressed, power saving can be realized, and it can be applied to various light sources. .

  Furthermore, as shown in FIG. 15, this illuminating device includes light diffusing plates 24A ′ and 24B ′ (referred to as light diffusing plate 24 ′ when collectively referred to) that are curved in a concave dome shape on the viewer P side. You may have. Similarly, as shown in FIG. 16, the illumination device may include 25A ′ and 25B ′ (referred to as a screen 25 ′ when collectively referred to) that are curved in a concave dome shape on the viewer P side.

  The light diffusing plate 24 ′ or the screen 25 ′ has a surface shape such that the shape of the illumination light L perceived by the observer P is an ellipse, as shown in FIGS. 4, 5, and 9 to 12. ing. The distance between the light diffusing plate 24 ′ and the screen 25 ′ and the light source unit 21 is adjusted so that the luminance contour lines around the display unit 100 a have an elliptical shape. That is, as shown in FIGS. 4 and 5, the isoluminance lines in the vicinity of the display unit 100a have a shape according to the display unit 100a. The isoluminance lines become elliptical as the distance from the display unit 100a increases.

  According to such an illuminating device, the isoluminance lines of the illumination light L are elliptical in correspondence with the fact that the guiding visual field (d) and the auxiliary visual field (e) are elliptical as shown in FIG. Can be shaped. Therefore, this illuminating device can further reduce the sense of burden on the eyes by adapting the manner in which the luminance on the light diffusing plate 24 ′ or the screen 25 ′ is lowered to the visual characteristics of the observer P.

  Furthermore, the above-described lighting device may control the light source unit 21 so that the chromaticity near the outer frame of the display unit 100a matches the chromaticity of the display unit 100a. Accordingly, the lighting device sets the luminance in the vicinity of the display unit 100a to the same level as the luminance of the display unit 100a and sets the chromaticity in the vicinity of the display unit 100a to the same level as the chromaticity of the display unit 100a. This further reduces the visual stimulus of the observer P and suppresses eye fatigue.

  Such an illuminating device can adjust the chromaticity of the light source part 21 illuminated by the surrounding illumination part 2, for example. For this purpose, the ambient illumination unit 2 is mounted with a combination of light sources 21 of a plurality of colors. The controller 3 adjusts the chromaticity on the light diffusion plate 24 or the screen 25 by controlling the light intensity for each light source unit 21. At this time, the controller 3 adjusts the chromaticity in the vicinity of the display unit 100a so as to be approximately the same as the chromaticity of the display unit 100a as a sensor signal detected by the sensor unit 1. Note that the controller 3 may set the chromaticity of the peripheral illumination unit 2 to match the display unit 100a when the color of the display unit 100a is considerably different from white.

  Moreover, the controller 3 may change the chromaticity in the surrounding illumination part 2 to the chromaticity which is hard to be perceived by the observer P, so that it leaves | separates from the display part 100a. Thereby, the illumination device can set the luminance between the guidance visual field and the auxiliary visual field to a luminance that is not perceived by the observer P and a color that is not perceived by the observer P.

  According to such an illuminating device, by making it possible to adjust the color of the illumination light L, it is possible to further reduce the feeling of burden on the eyes of the observer P and to suppress the fatigue of the observer P. Further, according to this lighting device, even when the color of the display unit 100a is changed in order to match the visual characteristics of an elderly person or the like or to enhance the immersive feeling, the display unit 100a is changed. Accordingly, the color of the illumination light L in the peripheral illumination unit 2 can also be changed.

  Furthermore, this illuminating device may irradiate the periphery of the display unit 100a with indirect light. For example, as shown in FIG. 17 or 18, the ambient illumination unit 2 of the illumination device may include an irradiated member 30 instead of the light diffusion plate 24 and the screen 25. The irradiated member 30 includes a back surface portion 30 a disposed on the back surface of the display 100, an upper surface portion 30 b disposed above the display 100, and a lower surface portion 30 c disposed below the display 100. The irradiated member 30 may include a back surface portion 30a as a wall, a lower surface portion 30c as a floor, and an upper surface portion 30b as a ceiling. Further, the irradiated member 30 may be a display cabinet or the like.

  In addition, as shown in FIG. 17, the illumination device includes a plurality of light source units 21 </ b> A and 21 </ b> B that irradiate illumination light toward the irradiated member 30 (hereinafter, collectively referred to as the light source unit 21). . The light source unit 21 </ b> A projects the illumination light LA that is perceived mainly above the display 100. The light source unit 21 </ b> B projects the illumination light LB that is mainly perceived below the display 100. In addition, the light source part 21 may be provided with two or more besides illustration. In addition, the light source unit 21 may be shaded by the illumination light L depending on the shape of the irradiated member 30 such as a wall, a floor, a ceiling, or a display cabinet. In this case, in order to suppress an increase in the sense of burden on the eyes, it is desirable to prevent uneven shadows from occurring in the periphery by changing the arrangement of the light source unit 21 or the like.

  Lenses 26A and 26B are arranged in the light irradiation direction of these light source units 21A and 21B. By providing these lenses 26A and 26B, the illumination ranges of the illumination lights LA and LB are limited. The lenses 26 </ b> A and 26 </ b> B are installed so that the illumination light L is perceived from the guidance visual field of the observer P to the auxiliary visual field when the observer P views the display unit 100 a from a predetermined viewpoint position.

  In such a lighting device, when the observer P views the display unit 100a, the sensor unit 1 detects the luminance or chromaticity of the display unit 100a or the vicinity of the display unit 100a. The controller 3 adjusts the intensity of the illumination light L emitted from the light source unit 21 based on the sensor signal detected by the sensor unit 1. The illumination light L is once projected onto the back surface 30a of the irradiated member 30 and perceived by the observer P as indirect light. Accordingly, indirect light having a luminance or chromaticity equal to or lower than that of the display unit 100a can be perceived in the vicinity of the display unit 100a. Further, it is possible to perceive indirect light whose luminance gradually decreases as the distance from the display unit 100a increases, and to reduce the luminance so that the observer P cannot perceive within the range of the guide visual field of the observer P to the auxiliary visual field.

  In this lighting device, when the back surface portion 30a is constituted by a wall, the lower surface portion 30c is constituted by a floor, and the upper surface portion 30b is constituted by a ceiling, it is desirable to correct the illumination light L based on the spectral reflectance of each portion. Moreover, when the spectral reflection characteristics of the wall, floor, ceiling, display cabinet, and the like as the irradiated member 30 are not appropriate, they may be covered with a sheet having appropriate characteristics.

  As described above, according to this illumination device, by making the light perceived by the observer P into indirect light, it is possible to further reduce eye irritation and reduce eye fatigue. Moreover, according to this illuminating device, the freedom degree in installation, such as arrangement | positioning of the light source part 21, is high.

  Moreover, the illuminating device shown in FIG. 18 as another structural example is provided with the light source unit 21 and the lens 26 on the back surface of the display unit 100a. The light source unit 21 irradiates the back surface 30 a of the irradiated member 30 with the illumination light L via the lens 26. The illumination light L is diffused by the lens 26 and applied to the back surface portion 30a. By restricting the illumination light L, the lens 26 gradually decreases the luminance perceived by the observer P as it moves away from the vicinity of the display unit 100a. Do not be. Even with such a configuration, it is possible to further reduce eye irritation by reducing eye irritation as in the illumination device of FIG.

  In addition, as illustrated in FIG. 19 or FIG. 20, the lighting device may include a camera 40 as an imaging device that images the display unit 100 a or the vicinity of the outer frame of the display unit 100 a instead of the sensor unit 1. The controller 3 is supplied with image data including the display unit 100a captured by the camera 40 and the vicinity of the display unit 100a. The controller 3 detects the luminance of the display unit 100a and the luminance near the outer frame of the display unit 100a based on the image data. Thus, the controller 3 controls the intensity of the illumination light L emitted from the light source unit 21 to adjust the luminance on the light diffusion plate 24 or the screen 25 in the vicinity of the display unit 100a to the same level as the luminance of the display unit 100a. it can.

  Further, the controller 3 may divide a region that causes the observer P to perceive light, and may adjust the luminance that the viewer P perceives for each of the divided regions. For this purpose, the controller 3 detects the brightness of each divided area based on the image data captured by the camera 40. As described above, the controller 3 adjusts the illumination light L so that the perceived luminance gradually decreases as the distance from the display unit 100a increases as described above.

  According to such an illuminating device, the burden on the eye can be further reduced by finely controlling the illumination light L.

  The above-described embodiment is an example of the present invention. For this reason, the present invention is not limited to the above-described embodiment, and various modifications can be made depending on the design and the like as long as the technical idea according to the present invention is not deviated from this embodiment. Of course, it is possible to change.

1 Sensor unit (detection unit)
2 Peripheral lighting section (lighting section)
3 Controller (control unit)
21 Light source (illumination)
22, 23 Light shielding plate (illumination part)
24 Light diffusing plate (illumination part)
25 screen (lighting part)
26 Lens (illumination part)
30 Irradiated member (illumination part)
40 Camera (imaging device)
100 Display (display device)

Claims (8)

A lighting section;
A detection unit for detecting luminance near a display unit of the display device or an outer frame of the display unit;
The luminance around the display unit of the display device is gradually decreased from the luminance detected by the detection unit to a luminance at which an observer cannot perceive light as the distance from the outer frame of the display unit of the display device increases. And a controller that controls the illuminating unit so as to make the luminance such that the observer cannot perceive light within a range from the outer frame of the unit to the observer's guidance visual field to the auxiliary visual field.   The lighting device according to claim 1, wherein the control unit controls the lighting unit such that the equiluminance range is an elliptical shape.   The said control part controls the said illumination part so that chromaticity near the outer frame of the said display part may be matched with the chromaticity of the display part of the said display apparatus, The Claim 1 or Claim 2 characterized by the above-mentioned. Lighting device.   The illumination device according to any one of claims 1 to 3, wherein the illumination unit irradiates the periphery of the display unit with indirect light.   The lighting device according to claim 1, wherein the control unit limits the luminance around the display unit to a preset upper limit value or less.   The lighting device according to any one of claims 1 to 5, wherein the control unit does not irradiate light to a display unit of the display device.   The illumination device according to claim 1, wherein the detection unit is an imaging device that captures an image of a display unit of the display device or a vicinity of an outer frame of the display unit. A display unit for displaying images;
A lighting section;
A detection unit for detecting luminance near the outer frame of the display unit or the display unit;
The brightness in the periphery of the display part of the display part is gradually reduced from the brightness detected by the detection part to a brightness that the observer cannot perceive light, and the range from the outer frame of the display part to the observer's guidance visual field to the auxiliary visual field And a control unit that controls the illumination unit so as to have a luminance that an observer cannot perceive light.