JP2015141066A - Photometric device and image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a photometric device capable of appropriately correcting a display color and an image display device using the photometric device.SOLUTION: A photometric device 30 comprises: an enclosure 31 having a first light-shading part 311 provided with a first light incident hole 331 for letting light from a first direction pass through and a second light-shading part 312 provided with a second light incident hole 332 for letting light from a second direction different from the first direction pass through; a wavelength variable interference filter 5, provided inside the enclosure 31, for radiating a light of prescribed wavelength among the incident light; and light-receiving parts (photosensors 341, 342), provided inside the enclosure 31, for receiving the light radiated from the wavelength variable interference filter 5, the light-receiving parts (photosensors 341, 342) receiving the light of the prescribed wavelength of the incident light injected from the first light incident hole 331 to the wavelength variable interference filter 5 and the light of the prescribed wavelength of the light injected from the second light incident hole 332 to the wavelength variable interference filter 5 independently of each other.

Description

  The present invention relates to a photometric device and an image display device using the same.

2. Description of the Related Art Conventionally, a display device that measures a characteristic amount such as luminance of a displayed image and adjusts a display color is known (see, for example, Patent Document 1).
The display device described in Patent Document 1 includes a photometric device that can be moved from a bezel to a display area. The photometric device includes an optical sensor and a photo detector facing the display screen, and the display device corrects the display color based on the measurement result of the photometric device.

JP 2005-208548 A

By the way, in order to appropriately correct the color of the image displayed on the display device, it is necessary to accurately measure the color of the displayed image. For example, when a liquid crystal display device is used as the display device, a cold cathode tube is used for the backlight, and the spectrum of light emitted from the liquid crystal display device has a peak spectrum shape as shown in FIG. 10 (at each peak wavelength). The full width at half maximum is small and has a sharp shape). Even when a self-luminous element such as an LED or an organic EL is used for the backlight, the spectrum shape at the peak wavelength is similarly peaky.
With respect to such a display device, in Patent Document 1, the feature amount of light is measured by an optical sensor or a photodiode. Such optical sensors and photodiodes can measure only limited color information such as RGB components, and cannot measure the detailed spectrum as described above.
Furthermore, the image observed by the viewer of the display device is affected not only by the light output from the display screen but also by external light incident on the display screen, and only the color output from the display screen is displayed. When measured, there is a problem that the color recognized by the observer cannot be detected accurately.
Therefore, the measurement apparatus as described above and a display apparatus using the same have a problem that color correction of a display image cannot be performed appropriately.

  An object of the present invention is to provide a photometric device capable of appropriately color-correcting a display color and an image display device using the same.

  The photometric device of the present invention includes a first light-shielding portion provided with a first light incident hole that allows light from a first direction to pass through, and a second light incident that allows light from a second direction different from the first direction to pass through. A housing having a second light-shielding portion provided with a hole, a spectral filter provided in the housing and emitting light of a predetermined wavelength out of incident light, and provided in the housing and emitted from the spectral filter. A light receiving portion for receiving the light, and the light receiving portion receives the light having the predetermined wavelength of the incident light incident on the spectral filter from the first light incident hole and the spectral light from the second light incident hole. The light having the predetermined wavelength of the light incident on the filter is received independently of each other.

Here, when the light is incident from the first light incident hole, the second light incident hole needs to be in a shielded state, and when the second light incident light is incident, the first light is incident. The incident hole needs to be in a shielded state. Without such a configuration, when the light is supplied from each light incident hole into the housing by the spectral filter, the light incident in the housing cannot be reliably dispersed. For this reason, in the present invention, for example, a shielding plate that shields the first light incident hole and the second light incident hole is provided, shields either the first light incident hole or the second light incident hole, and both light incident Suppresses simultaneous incidence of light from the holes.
In the present invention, light from the first direction enters the housing from the first light incident hole, and the incident light is emitted toward the light receiving unit as light having a predetermined wavelength via the spectral filter. In addition, light from the second direction enters the housing through the second light incident hole, and the incident light is emitted toward the light receiving unit as light having a predetermined wavelength through the spectral filter. The light receiving unit receives light of a predetermined wavelength based on light incident from the first light incident hole and light of a predetermined wavelength based on light incident from the second light incident hole, respectively. That is, since the light of the predetermined wavelength based on the light incident from the first light incident hole and the second light incident hole is not simultaneously received, the number of the light receiving portions may be one. As a result, by using one spectral filter and one light receiving unit without providing a plurality of spectral filters, light incident into the housing from different directions can be reliably received by the light receiving unit, and the colorimetric accuracy can be improved. Can be increased.
That is, according to an apparatus using the photometric device of the present invention, for example, an image display device, the display color can be appropriately color-corrected using highly accurate received light data acquired by the photometric device.

In the photometric device of the present invention, it is preferable that the first light incident hole and the second light incident hole are provided coaxially.
In the present invention, since the first light incident hole and the second light incident hole are provided on the same axis, the light receiving unit receives light from the first direction and light from the second direction on the same axis. can do. Thereby, for example, when a display or the like is arranged on the first direction side and external light is incident from the second direction side, the light output from the display or the like and the emission position of the light output from the display or the like are actually External light that may be affected can be received by the light receiving unit.

  In the photometric device of the present invention, the spectral filter is provided on a virtual axis line passing through the centers of the first light incident hole and the second light incident hole between the first light shielding part and the second light shielding part. The light receiving portion is provided on the first light shielding portion side of the spectral filter and is movable forward and backward with respect to an optical path of light incident from the first light incident hole, and is incident from the first light incident hole. A first light receiving unit that receives light that has been incident through the second light incident hole and passed through the spectral filter when disposed in the optical path of the light, and on the second light shielding unit side of the spectral filter, and It is provided so as to be able to advance and retreat with respect to the optical path of light incident from the second light incident hole, and is disposed from the first light incident hole when disposed in the optical path of light incident from the second light incident hole. A second light receiving portion for receiving light that has passed through the spectral filter, It is preferable.

  In the present invention, since the first light receiving part provided on the first light shielding part side and the second light receiving part provided on the second light shielding part side are provided so as to be movable back and forth, they are incident from the second light incident hole. When receiving light that has passed through the spectral filter, the first light receiving unit is disposed in the optical path of light incident from the first light incident hole, and the second light receiving unit is disposed in the optical path of light incident from the second light incident hole. Evacuate so that they do not overlap. Thereby, the 1st light-receiving part can receive the light which injected from the 2nd light incident hole reliably, and passed the spectral filter. On the other hand, when receiving light incident from the first light incident hole and passing through the spectral filter, the second light receiving unit is disposed in the optical path of the light incident from the first light incident hole, and the first light receiving unit is The first light incident hole is retracted so as not to overlap the optical path of the light incident thereon. Thereby, the 1st light-receiving part can receive the light which injected from the 2nd light incident hole reliably, and passed the spectral filter.

  In the photometric device of the present invention, the spectral filter is provided on a virtual axis line passing through the centers of the first light incident hole and the second light incident hole between the first light shielding part and the second light shielding part. And is provided so as to be able to advance and retreat with respect to the optical path of the light incident from the first light incident hole, and is disposed from the second light incident hole to the optical path of the light incident from the first light incident hole. A first light guide optical system that guides the light incident on the spectral filter and emitted from the spectral filter to the light receiving unit, and is capable of moving forward and backward with respect to the optical path of the light incident from the second light incident hole; A second light guide optical system that guides the light incident on the spectral filter from the first light incident hole and emitted from the spectral filter to the light receiving unit when arranged in the optical path of the light incident from the two light incident holes And are preferably provided.

  In the present invention, when the first light guide optical system is disposed in the optical path of the light incident from the first light incident hole, the first light guide optical system enters the spectral filter from the second light incident hole, When the light emitted from the spectral filter is guided to the light receiving unit and the second light guide optical system is disposed in the optical path of the light incident from the second light incident hole, the second light guide optical system is Is incident on the spectral filter, and the light emitted from the spectral filter is guided to the light receiving unit. Thereby, it is possible to reliably receive the light incident from the first light incident hole and incident through the spectral filter and the light incident from the second light incident hole and transmitted through the spectral filter by providing only one light receiving portion.

In the photometric device of the present invention, the spectral filter is preferably a variable wavelength Fabry-Perot etalon having a pair of reflective films facing each other.
In the present invention, the spectral filter is configured by a variable wavelength Fabry-Perot etalon that causes incident light incident on a pair of reflecting films to interfere and transmit light of a specific wavelength. Such Fabry-Perot etalon can be reduced in size as compared with spectroscopic elements such as AOTF (Acousto-Optic Tunable Filter) and LCTF (Liquid Crystal Tunable Filters), and can be easily incorporated into a photometric device and an image display device. it can. For example, a spectroscopic camera can be mounted on a thin mobile phone.

In the photometric device of the present invention, it is preferable that the spectral filter includes a gap changing unit that changes a gap dimension of the pair of reflective films.
In the present invention, since the gap dimension of the pair of reflective films can be changed by the gap changing unit, the wavelength of light transmitted through the pair of reflective films can be changed.

  The image display device of the present invention includes a first light-shielding portion provided with a first light incident hole that allows light from a first direction to pass through, and second light that allows light from a second direction different from the first direction to pass through. A housing having a second light-shielding portion provided with an incident hole, a spectral filter provided in the housing and emitting light of a predetermined wavelength out of incident light, and provided in the housing and emitted from the spectral filter A light receiving unit that receives the emitted light, wherein the light receiving unit receives the light having the predetermined wavelength from the first light incident hole and enters the spectral filter, and the second light incident hole A photometric device that independently receives the light having the predetermined wavelength of the light incident on the spectral filter, a display unit that displays an image, and a control unit that controls the display unit and the photometric device, The first light-shielding portion of the photometric device is a front The second light-shielding part is provided opposite to the first light-shielding part in the photometric device, and the control part is provided with the first light incident received by the light-receiving part. The amount of light of the predetermined wavelength of the incident light incident on the spectral filter from the hole, the light of the predetermined wavelength of the light incident on the spectral filter from the second light incident hole, and the first light incident hole And a color correction unit that acquires a spectrum of the incident light based on the amount of incident light and corrects the color of the display unit based on the spectrum.

In the present invention, the photometric device is provided, and the light receiving unit of the photometric device has a predetermined wavelength based on the light incident from the first light incident hole and a predetermined wavelength light based on the light incident from the second light incident hole. Are received independently. That is, since the light of the predetermined wavelength based on the light incident from the first light incident hole and the second light incident hole is not simultaneously received, only one light receiving unit may be used. As a result, by using one spectral filter and one light receiving unit without providing a plurality of spectral filters, light incident into the housing from different directions can be reliably received by the light receiving unit, and the colorimetric accuracy can be improved. Can be increased. In addition, since the first light shielding portion of the photometric device is arranged to face the display portion, the light from the display portion is incident from the first light incident hole, and the second light shielding portion faces the first light shielding portion. External light is incident from the second light incident hole. For this reason, the control unit includes a light amount of the predetermined wavelength of the incident light from the display unit that is incident on the spectral filter from the first light incident hole received by the light receiving unit of such a photometric device, and the first A spectrum of incident light is acquired based on the amount of light of the predetermined wavelength of external light incident on the spectral filter from the two-light incident hole, and color correction of the display unit is performed based on the spectrum.
In such a configuration, light having a predetermined wavelength based on light from the display unit incident from the first light incident hole via the spectral filter and light having a predetermined wavelength based on external light incident from the second light incident hole. Since the amount of light at each wavelength can be acquired accurately, the accurate spectrum of the light output from the display unit and the spectrum of the external light applied to the display unit can be acquired. Accordingly, it is possible to appropriately perform color correction of the display unit in consideration of the influence of the spectrum of external light on the accurate spectrum output from the display unit.

In the image display device of the present invention, the display unit includes a display region for displaying an image and a bezel portion surrounding the display region, and the photometric device is provided so as to be able to advance and retreat from the bezel portion to the display region. Preferably it is.
In the present invention, the photometric device is provided so as to be movable back and forth from the bezel portion to the display area. For this reason, when normal image display is performed on the display unit, the photometric device can be housed in the bezel unit, and inconveniences that hinder display can be prevented.

1 is a front view showing an outline of a photometric device and an image display device in a first embodiment according to the present invention. 1 is a side sectional view of an image display device according to a first embodiment. The front view which shows schematic structure of the photometry apparatus of 1st embodiment. Sectional drawing of the photometry apparatus of 1st embodiment. 1 is a cross-sectional view illustrating an outline of a variable wavelength interference filter according to a first embodiment. 1 is a block diagram of an image display device according to a first embodiment. The flowchart which shows the image display process in the image display apparatus of 1st embodiment. Sectional drawing which shows schematic structure of the photometry apparatus of the image display apparatus in 2nd embodiment which concerns on this invention. Sectional drawing which shows schematic structure of the photometry apparatus of the image display apparatus in 3rd embodiment which concerns on this invention. The figure which shows an example of the spectrum of the light output from a liquid crystal display.

[First embodiment]
Hereinafter, a photometric device according to a first embodiment of the present invention and an image display device including the photometric device will be described with reference to the drawings.
[Overall configuration of image display device]
FIG. 1 is a front view showing an outline of the image display apparatus of the present embodiment. FIG. 2 is a cross-sectional view of the image display apparatus according to the present embodiment.
In FIG. 1, the image display apparatus 1 of the present embodiment includes a display unit 10 that displays an image and an exterior unit 20 that holds the display unit 10.

As shown in FIGS. 1 and 2, the display unit 10 includes a display 11 that is a display unit (display region) of the present invention and a bezel unit 12 that holds the display 11.
The display 11 may be configured by any display panel such as a liquid crystal panel, a PDP (Plasma Display Panel), an organic EL, and the like.
The bezel portion 12 is a frame member that holds the outer periphery of the display 11. The bezel portion 12 is provided with a photometric device 30 as shown in FIG.
A control unit 40 (see FIG. 6) that controls the display 11 and the photometric device 30 is provided inside the exterior unit 20, and the overall operation of the image display device 1 is controlled by the control unit 40. The detailed configuration of the control unit 40 will be described later.

[Configuration of photometric device]
Next, the photometric device 30 provided in the bezel portion 12 will be described based on the drawings.
FIG. 3 is an enlarged front view of the vicinity of the position where the photometric device 30 of the bezel portion 12 is provided. FIG. 4 is a view showing a cross section of the photometric device 30.
A photometric device 30 is attached to the bezel portion 12 surrounding the display 11. In addition, in FIG. 1 and FIG. 2, the position corresponding to the upper side center position of the display 11 is illustrated as a position where the photometric device 30 is provided, but is not limited thereto, and may be a corner portion of the display 11, for example. It is good also as a structure provided in a lower side or a side.

As shown in FIGS. 2 to 4, the bezel portion 12 is provided with a storage portion 121 that can store the photometric device 30, and the photometric device 30 is provided so as to be stored in the storage portion 121.
Specifically, as shown in FIG. 4, the photometric device 30 includes a housing 31 that can be housed in the housing portion 121, and the housing 31 is attached to the housing portion 121 of the bezel portion 12 by the rotation shaft 32. It has been. Thus, by rotating the housing 31 around the rotation shaft 32, the photometric device 30 can move forward and backward from the storage portion 121 of the bezel portion 12 to the area facing the display 11.

As shown in FIG. 4, the housing 31 includes a first light-shielding part 311 and a second light-shielding part 312, and these light-shielding parts 311 and 312 are made of a light-shielding member. Further, inside the housing 31, there are a wavelength variable interference filter 5 as a spectral filter of the present invention, optical sensors 341 and 342 and light receiving circuit boards 351 and 352 constituting a light receiving unit of the present invention, and a filter control circuit 36. Has been placed.
The first light shielding portion 311 is a panel that is disposed so as to face the display 11 when the rotation shaft 32 is rotated to move the housing 31 to the display 11 side. The second light shielding unit 312 is a panel disposed on the opposite side of the housing 31 from the display 11.
In addition, a first light incident hole 331 through which light from the first direction, that is, light output from the display 11 is incident on the inside of the housing 31 is provided in a part of the first light shielding portion 311. A part of the second light shielding portion 312 is provided with a second light incident hole 332 for allowing light from the second direction, that is, external light to enter the inside of the housing 31. The first light incident hole 331 and the second light incident hole 332 are provided at positions overlapping in a plan view as viewed from the display 11, that is, coaxially.

A first light receiving circuit board 351 is disposed on the inner side surface of the first light shielding portion 311. The first light receiving circuit board 351 has a light shielding property, and a first light sensor 341 is provided on the surface facing the second light shielding portion 312. The first optical sensor 341 and the first light receiving circuit board 351 are integrally provided so as to advance and retract along the arrow A1 shown in FIG. That is, the first optical sensor 341 and the first light receiving circuit board 351 are provided so as to be able to advance and retract with respect to the optical path of the light incident from the first light incident hole 331.
Similarly, the second light receiving circuit board 352 is disposed on the inner side surface of the second light shielding portion 312.
The second light receiving circuit board 352 has a light shielding property, and a second light sensor 342 is provided on the surface facing the first light shielding portion 311. The second optical sensor 342 and the second light receiving circuit board 352 are integrally provided so as to advance and retract along the arrow B1 shown in FIG. That is, the second optical sensor 342 and the second light receiving circuit board 352 are provided so as to be able to advance and retract with respect to the optical path of the light incident from the second light incident hole 332.
The first light receiving circuit board 351 and the second light receiving circuit board 352 are provided with a sensor drive circuit for driving the first light sensor 341 and the second light sensor 342, and the like. In addition, the first light receiving circuit board 351 and the second light receiving circuit board 352 are connected to the control unit 40 of the image display device 1, and the detection results of each of the optical sensors 341 and 342 (detection signals based on the detected light amounts). ) Is output to the control unit 40.

The tunable interference filter 5 is provided between the first light-shielding part 311 and the second light-shielding part 312 and on the hole axes of the first light incident hole 331 and the second light incident hole 332. A specific configuration of the wavelength variable interference filter 5 will be described later.
A filter control circuit 36 that controls driving of the wavelength tunable interference filter 5 is disposed in the vicinity of the wavelength tunable interference filter 5. The filter control circuit 36 performs control such as setting the wavelength of light transmitted through the wavelength variable interference filter 5 in the wavelength variable interference filter 5.

In such a photometric device 30, for example, light output from the display 11 is received (photometric) by the second optical sensor 342 and external light is received (photometric) by the first optical sensor 341 as follows.
Specifically, when external light is received, the second light receiving circuit substrate 352 is retracted so that the external light can enter from the second light incident hole 332, and the first light incident hole is received by the first light receiving circuit substrate 351. 331 is closed, and the first optical sensor 341 is disposed on the optical path of the light incident from the second light incident hole 332. As a result, out of the external light incident from the second light incident hole 332, light having a predetermined wavelength that has passed through the wavelength variable interference filter 5 is received by the first optical sensor 341.
Further, when receiving the light output from the display 11, the first light receiving circuit board 351 is retracted so that the light output from the display 11 can enter through the first light incident hole 331, and the second light receiving circuit board is retracted. The second light incident hole 332 is closed by 352, and the second light sensor 342 is arranged on the optical path of the light incident from the first light incident hole 331. As a result, out of the light output from the display 11 incident from the first light incident hole 331, light having a predetermined wavelength that has passed through the wavelength variable interference filter 5 is received by the second optical sensor 342.
That is, when the light incident from the first light incident hole 331 is measured, the second light incident hole 332 is in a closed state, while the light incident from the second light incident hole 332 is measured. In this case, the first light incident hole 331 is closed. Accordingly, each of the optical sensors 341 and 342 can independently receive (photometric) incident light.

(Configuration of wavelength variable interference filter)
FIG. 5 is a cross-sectional view showing a schematic configuration of the variable wavelength interference filter 5.
The wavelength tunable interference filter 5 of this embodiment is a wavelength tunable Fabry-Perot etalon that constitutes the spectral filter of the present invention. As shown in FIG. 5, the variable wavelength interference filter 5 includes a fixed substrate 51 that is a first substrate of the present invention and a movable substrate 52 that is a second substrate of the present invention. The fixed substrate 51 and the movable substrate 52 are each formed of, for example, various types of glass, crystal, silicon, or the like. The fixed substrate 51 and the movable substrate 52 are bonded such that the first bonding portion 513 of the fixed substrate 51 and the second bonding portion 523 of the movable substrate 52 are formed of, for example, a plasma polymerization film mainly containing siloxane. By being joined by the film 53, it is configured integrally.

  The fixed substrate 51 is provided with a fixed reflection film 54 as a first reflection film of the present invention, and the movable substrate 52 is provided with a movable reflection film 55 as a second reflection film of the present invention. The fixed reflection film 54 and the movable reflection film 55 are disposed to face each other via the inter-reflection film gap G1. The wavelength variable interference filter 5 is provided with an electrostatic actuator 56 that is used to adjust (change) the size of the gap G1 between the reflection films (the distance between the reflection films 54 and 55, the gap dimension). Yes. The electrostatic actuator 56 includes a fixed electrode 561 provided on the fixed substrate 51 and a movable electrode 562 provided on the movable substrate 52. These electrodes 561 and 562 face each other via an inter-electrode gap, and function as an electrostatic actuator 56 that is a gap changing portion of the present invention. Here, the electrodes 561 and 562 may be provided directly on the substrate surfaces of the fixed substrate 51 and the movable substrate 52, respectively, or may be provided via other film members. FIG. 5 shows an example in which the gap dimension of the interelectrode gap is larger than the gap dimension of the inter-reflection film gap G1, but the inter-electrode gap may be smaller than the inter-reflection film gap G1.

Hereinafter, the configuration of the wavelength variable interference filter 5 will be described in more detail.
In the fixed substrate 51, an electrode installation groove 511 and a reflection film installation part 512 are formed by etching. The fixed substrate 51 is formed to have a larger thickness than the movable substrate 52, and the electrostatic attractive force when a voltage is applied to the electrostatic actuator 56 and the deflection of the fixed substrate 51 due to the internal stress of the fixed electrode 561 are not affected. Absent.

The electrode installation groove 511 is formed in, for example, an annular shape centered on the plane center point of the fixed substrate 51. The reflection film installation portion 512 is formed to protrude from the center of the electrode installation groove 511 toward the movable substrate 52 in the plan view. The groove bottom surface of the electrode installation groove 511 is an electrode installation surface 511A on which the fixed electrode 561 is disposed. In addition, the protruding front end surface of the reflection film installation portion 512 is a reflection film installation surface 512A.
Although not shown, the fixed substrate 51 is provided with an electrode extraction groove extending from the electrode installation groove 511 toward the outer peripheral edge of the fixed substrate 51, and the fixing provided in the electrode installation groove 511 is provided. An extraction electrode for the electrode 561 is provided.

  A fixed electrode 561 is provided on the electrode installation surface 511 </ b> A of the electrode installation groove 511. More specifically, the fixed electrode 561 is provided in a region of the electrode installation surface 511 </ b> A that faces a movable electrode 562 of the movable portion 521 described later. In addition, an insulating film for ensuring insulation between the fixed electrode 561 and the movable electrode 562 may be stacked over the fixed electrode 561. Further, a fixed extraction electrode is connected to the fixed electrode 561, and the fixed extraction electrode is extracted from the electrode extraction groove described above to the outer peripheral portion of the fixed substrate 51 and connected to the filter control circuit 36.

  In the present embodiment, a configuration in which one fixed electrode 561 is provided on the electrode installation surface 511A is shown. For example, a configuration in which two electrodes that are concentric circles centered on a plane center point are provided (double electrode configuration). And so on.

As described above, the reflective film installation part 512 is formed in a substantially cylindrical shape having a smaller diameter than the electrode installation groove 511 on the same axis as the electrode installation groove 511, and is formed on the movable substrate 52 of the reflective film installation part 512. An opposing reflection film installation surface 512A is provided.
A fixed reflective film 54 is installed in the reflective film installation part 512. As the fixed reflective film 54, for example, a metal film such as Ag or an alloy film such as an Ag alloy can be used. For example, a dielectric multilayer film in which the high refractive layer is TiO ₂ and the low refractive layer is SiO ₂ may be used. Further, a reflective film in which a metal film (or alloy film) is laminated on a dielectric multilayer film, a reflective film in which a dielectric multilayer film is laminated on a metal film (or alloy film), a single refractive layer (TiO ₂ or SiO ₂₎ and a metal film (or alloy film) and the like may be used reflective film formed by laminating a.

  The movable substrate 52 includes a circular movable portion 521 centered on a plane center point, a holding portion 522 that is coaxial with the movable portion 521 and holds the movable portion 521, and a substrate outer peripheral portion provided outside the holding portion 522. 525.

  The movable part 521 is formed to have a thickness dimension larger than that of the holding part 522. For example, in this embodiment, the movable part 521 is formed to have the same dimension as the thickness dimension of the movable substrate 52. The movable portion 521 is formed to have a diameter larger than at least the diameter of the outer peripheral edge of the reflection film installation surface 512A in the filter plan view. The movable part 521 is provided with a movable electrode 562 and a movable reflective film 55.

The movable electrode 562 faces the fixed electrode 561 with an interelectrode gap interposed therebetween, and is formed in an annular shape having the same shape as the fixed electrode 561. Although illustration is omitted, the movable substrate 52 is provided with a movable extraction electrode extending from the outer peripheral edge of the movable electrode 562 toward the outer peripheral edge of the movable substrate 52. This movable extraction electrode is connected to the filter control circuit 36 in the same manner as the fixed extraction electrode.
The movable reflective film 55 is provided at the center of the movable surface 521A of the movable part 521 so as to face the fixed reflective film 54 with the gap G1 between the reflective films. As the movable reflective film 55, a reflective film having the same configuration as that of the fixed reflective film 54 described above is used.

The holding part 522 is a diaphragm that surrounds the periphery of the movable part 521, and has a thickness dimension smaller than that of the movable part 521. Such a holding part 522 is easier to bend than the movable part 521, and the movable part 521 can be displaced toward the fixed substrate 51 by a slight electrostatic attraction. At this time, since the movable portion 521 has a thickness dimension larger than that of the holding portion 522 and becomes rigid, even when the holding portion 522 is pulled toward the fixed substrate 51 by electrostatic attraction, the shape of the movable portion 521 changes. Absent. Therefore, the movable reflective film 55 provided on the movable portion 521 is not bent, and the fixed reflective film 54 and the movable reflective film 55 can be always maintained in a parallel state.
In the present embodiment, the diaphragm-like holding part 522 is illustrated, but the present invention is not limited to this. For example, a configuration in which beam-like holding parts arranged at equiangular intervals around the plane center point are provided. It is good.

  As described above, the substrate outer peripheral portion 525 is provided outside the holding portion 522 in the filter plan view. The surface of the substrate outer peripheral portion 525 that faces the fixed substrate 51 includes a second joint portion 523 that faces the first joint portion 513, and the second joint portion 523 is joined to the first joint portion 513 by the joining film 53. ing.

  In the wavelength variable interference filter 5 as described above, the electrostatic actuator 56 is configured by the fixed electrode 561 and the movable electrode 562, and these electrodes 561 and 562 are connected to the filter control circuit 36. Then, a voltage is applied from the filter control circuit 36 to the electrostatic actuator 56 under the control of the control unit 40, whereby an electrostatic attractive force corresponding to the voltage acts between the electrodes 561 and 562, and the gap G1 between the reflection films is applied. The gap dimension is changed. As a result, the wavelength of light transmitted through the wavelength variable interference filter 5 can be changed.

[Configuration of control unit]
FIG. 6 is a block diagram illustrating a schematic configuration of the image display apparatus 1 of the present embodiment.
As shown in FIG. 6, the control unit 40 that controls the display 11 and the photometric device 30 (see FIG. 4) includes a storage unit 41, a display control unit 42, a color measurement processing unit 43, a color correction unit 44, It has.
The storage unit 41 is configured by, for example, a hard disk or a memory. In the storage unit 41, as various data, V-λ data indicating the relationship of the wavelength of light transmitted through the wavelength variable interference filter 5 with respect to the drive voltage applied to the electrostatic actuator 56 of the wavelength variable interference filter 5 is stored. Remembered.
The storage unit 41 is data for reproducing the color data of the original image on the display 11 when an image is displayed on the display 11, and parameters (for example, liquid crystal) for controlling the display 11 for each color data. In the panel, device profile data in which the voltage applied to the liquid crystal in order to set the transmittance of each color of RGB to a predetermined value is recorded.

The display control unit 42 controls the display 11 based on the device profile data stored in the storage unit 41.
The color measurement processing unit 43 includes a filter control unit 431 that drives the filter control circuit 36 and drives the electrostatic actuator 56 of the wavelength variable interference filter 5, a display color measurement unit 432, and an external light color measurement unit 433. Prepare.

The filter control unit 431 refers to the V-λ data stored in the storage unit 41 and reads the drive voltage for the wavelength of the light transmitted through the wavelength variable interference filter 5. The filter control unit 431 controls the filter control circuit 36 to apply the read drive voltage to the electrostatic actuator 56 of the wavelength variable interference filter 5.
The display color measuring means 432 retracts the first light receiving circuit board 351 (the first light incident hole 331 is opened), and causes the second light receiving circuit board 352 and the second light sensor 342 to move to the first light incident hole. It is arranged on the optical path of light incident from 331 (light output from the display 11). Further, the display colorimetric means 432 acquires the amount of light from the display 11 received by the second light sensor 342 based on the detection signal input from the second light sensor 342 via the second light receiving circuit board 352. To do. The display colorimetric unit 432 calculates the spectral spectrum of the light output from the display based on the light amount of each wavelength.

The external light color measurement means 433 retracts the second light receiving circuit board 352 (the second light incident hole 332 is opened), and makes the first light receiving circuit board 351 and the first light sensor 341 incident on the second light. It arrange | positions on the optical path of the light (external light) which injects from the hole 332. The external light color measurement unit 433 acquires the amount of external light based on the detection signal input from the first light sensor 341 via the first light receiving circuit board 351. Further, the external light colorimetric means 433 calculates the spectral spectrum of the external light based on the light quantity of each wavelength.
The color correction unit 44, which is a color correction unit of the present invention, corrects the device profile data based on the spectrum of light output from the display 11 and the spectrum of external light. That is, the display color displayed on the display 11 is corrected.

[Color correction processing in image display device]
Next, color correction processing in the image display apparatus 1 as described above will be described with reference to the drawings. FIG. 7 is a flowchart showing color correction processing in the image display apparatus 1.
In order to perform the color correction processing of the image display device 1, first, the photometric device 30 is advanced from the storage portion 121 of the bezel portion 12 to the display 11 side.
Thereafter, the display control unit 42 displays an image of a reference color (for example, white) on the display 11 based on, for example, color data stored in the device profile data (step S1). Note that the image display position may be only the pixel region facing the photometric device 30.

Then, the colorimetric processing unit 43 measures the display unit light amount (the light amount of light output from the display 11) (step S2).
In the measurement of the light amount of the display unit, the colorimetric processing unit 43 detects the state of the photometric device 30. Specifically, the first light incident hole 331 of the photometric device 30 is in an open state, the second light incident hole 332 is in a light shielding state, and on the optical axis of light incident from the first light incident hole 331. It is determined whether or not the second light sensor 342 is located. For example, it may be determined whether or not a detection signal having a signal level equal to or higher than a predetermined value is output from the second optical sensor 342. For example, a switch that engages with the first light receiving circuit board 351 when the first light receiving circuit board 351 moves to a position away from the first light incident hole 331 is provided in the first light shielding portion 311, and the second light sensor For example, a switch that engages with the second light receiving circuit substrate 352 when the 342 moves to a position on the optical path of the light incident from the first light incident hole 331 may be used.
When it is determined that the photometric device 30 is not in the above state, the display colorimetric means 432 retracts the first light receiving circuit board 351 (the first light incident hole 331 is opened), and the second The light receiving circuit board 352 and the second optical sensor 342 are arranged on the optical path of the light incident from the first light incident hole 331 (light output from the display 11). On the other hand, when it is determined that the photometric device 30 is in the above state, the colorimetric processing unit 43 controls movement of the first light receiving circuit board 351, the second light receiving circuit board 352, and the second light sensor 342. Not to maintain its position.

  Thereafter, the filter control means 431 of the colorimetric processing unit 43 applies a voltage to the electrostatic actuator 56 of the variable wavelength interference filter 5 of the photometric device 30 based on the V-λ data. In addition, the display colorimetric unit 432 acquires the light amount of the light transmitted from the wavelength variable interference filter 5 (display unit light amount) based on the detection signal from the second optical sensor 342. At this time, the filter control unit 431 sequentially changes the voltage applied to the electrostatic actuator 56 to change the wavelength of light transmitted through the wavelength variable interference filter 5 at a predetermined interval (for example, an interval of 10 nm). Acquires the amount of light of each wavelength. Further, the display colorimetric unit 432 stores the wavelength and the light amount in the storage unit 41 in association with each other. That is, the storage unit 41 stores spectral data of colors actually output when the reference color is displayed on the display 11.

Thereafter, the colorimetric processing unit 43 performs a light receiving unit switching process (switching from the second light sensor 342 to the first light sensor 341) in order to measure the amount of external light (step S3).
That is, the colorimetric processing unit 43 retracts the second light receiving circuit board 352 (the second light incident hole 332 is opened), and moves the first light receiving circuit board 351 and the first light sensor 341 to the second light. It arrange | positions on the optical path of the light (external light) which injects from the incident hole 332.

  Thereafter, the colorimetric processing unit 43 measures the amount of external light (the amount of external light projected toward the display 11) (step S4). Specifically, the filter control means 431 of the colorimetric processing unit 43 applies a voltage to the electrostatic actuator 56 of the wavelength variable interference filter 5 of the photometric device 30 based on the V-λ data, similarly to step S3. . The external light colorimetric means 433 acquires the amount of light transmitted from the wavelength variable interference filter 5 based on the detection signal from the first light sensor 341. In step S4, as in step S2, the voltage applied to the electrostatic actuator 56 is sequentially changed, and the wavelength of the light transmitted through the wavelength variable interference filter 5 is changed at a predetermined interval (for example, an interval of 10 nm). Get the amount of light. Further, the colorimetric processing unit 43 stores the wavelength and the light quantity in the storage unit 41 in association with each other. That is, the storage unit 41 stores spectrum data related to the influence of external light projected on the display 11.

  Thereafter, the color correction unit 44 performs a color correction process (step S5). For this purpose, first, measured color data (for example, data of RGB, Lab, etc.) of the measured color is calculated from the spectrum data of the reference color acquired in step S2. Further, the color correction unit 44 calculates measured color data of the measured color from the spectrum data regarding the external light acquired in step S5. Then, the color correcting unit 44 multiplies the measurement color data calculated based on the spectrum data acquired in step S2 by a predetermined coefficient (for example, coefficient α = 0.9). Further, the color correction unit 44 multiplies the measurement color data calculated based on the spectrum data acquired in step S5 by a predetermined coefficient (for example, coefficient β = 0.1). Then, the color correction unit 44 calculates a difference value between the original data of the reference color and the total sum of the measurement color data multiplied by the coefficient, and corrects the device profile data based on the difference value.

In the example of the color correction process, only the color correction based on the reference color image is performed. However, the present invention is not limited to this. For example, a single color image is sequentially switched and displayed on the display 11, and each of these images is displayed. The color correction processing as described above may be performed for each.
In the color correction process, the display unit light amount measurement (step S2) is performed prior to the external light amount measurement (step S5), but either may be performed first.

[Operational effects of the first embodiment]
The photometric device 30 of the image display device 1 according to the present embodiment includes a first light receiving circuit board 351 and a first light sensor 341 provided on the first light shielding unit 311 side, and a second provided on the second light shielding unit 312 side. The light receiving circuit board 352 and the second optical sensor 342 are provided so as to freely advance and retract. For example, when the first light sensor 341 receives light that has entered through the second light incident hole 332 and passed through the variable wavelength interference filter 5, the second light receiving circuit substrate 352 is positioned so as to close the first light incident hole 331. In addition, the first optical sensor 341 is positioned so as to overlap the optical path of the light incident from the second light incident hole 332, and the second light receiving circuit substrate 352 is disposed in the optical path of the light incident from the second light incident hole 332. Evacuate so that they do not overlap. As a result, the first optical sensor 341 can reliably receive light (light output from the display 11) that has entered the second light incident hole 332 and passed through the wavelength variable interference filter 5. On the other hand, when receiving light that has entered through the first light incident hole 331 and passed through the variable wavelength interference filter 5, the first light receiving circuit substrate 351 is positioned so as to close the second light incident hole 332; The second optical sensor 342 is positioned so as to overlap the optical path of the light incident from the first light incident hole 331, and the first light receiving circuit board 351 does not overlap the optical path of the light incident from the first light incident hole 331. Evacuate to. As a result, the second optical sensor 342 can reliably receive the external light that has entered the first light incident hole 331 and has passed through the wavelength variable interference filter 5.

  Further, with such a configuration, when receiving light incident from the first light incident hole 331, the second light receiving circuit substrate 352 serves as a light shielding plate that blocks the second light incident hole 332, and When the light incident from the light incident hole 332 is received, the first light receiving circuit substrate 351 serves as a light shielding plate that closes the first light incident hole 331. Accordingly, each of the optical sensors 341 and 342 can independently receive (photometric) incident light.

In the image display device 1 of the present embodiment, the light of the reference color image and the external light displayed on the display 11 are incident on the wavelength variable interference filter 5 and light having a wavelength according to the gap size between the reflective films 54 and 55. And the amount of light is detected by the optical sensor 33. And the control part 40 is based on the light quantity detection result (the spectrum of the light output from the display 11, and the spectrum of external light) of the light of several wavelengths obtained by switching gap dimension sequentially, The display color of the display 11 is demonstrated. Perform color correction.
In a display device such as a liquid crystal display, as shown in FIG. 10, the light output from the display 11 changes in peak light amount in a peaky manner. For example, when detecting a display color in three bands of RGB, which wavelength It is not possible to specify whether the amount of light is for. On the other hand, in the present embodiment, as described above, since the light amount of each wavelength is acquired, the light amount with respect to the peak wavelength can be accurately detected. Furthermore, each wavelength based on the light output from the display 11 incident from the first light incident hole 331 via the wavelength variable interference filter 5 and each external light incident from the second light incident hole 332. By receiving the light of the wavelength, the amount of light at each wavelength can be accurately acquired, so that the accurate spectrum of the light output from the display 11 and the spectrum of the external light irradiated on the display 11 can be acquired. it can. Therefore, the device profile data of the display 11 can be appropriately corrected in consideration of the influence of the spectrum of the external light on the accurate spectrum based on the detected light amount, and the display is performed with an accurate color corresponding to the original image data. 11 can be controlled.

  In the present embodiment, the first light incident hole 331 and the second light incident hole 332 are provided at positions that overlap in a plan view as viewed from the display 11 of the second light shielding portion 312, that is, on the same axis, The light from the display 11 and external light can be received by the respective optical sensors 341 and 342 on the same axis. Thereby, the accurate spectrum of the light output from the display 11 and the spectrum of the external light that can actually affect the emission position of the light output from the display 11 can be acquired more accurately. Therefore, since the spectrum of the external light that actually affects the spectrum of the light output from the display 11 can be detected, the device profile data of the display 11 can be corrected more appropriately, and an accurate color corresponding to the original image data can be corrected. The display 11 can be controlled.

  In this embodiment, the wavelength variable interference filter 5 is used as the spectral filter of the present invention. In such a wavelength tunable interference filter 5, by changing the voltage applied to the electrostatic actuator 56, the gap dimension between the reflective films 54 and 55 can be changed accurately and easily. Therefore, by sequentially switching the applied voltage of the electrostatic actuator 56, the light amount of each wavelength of the light output from the display 11 can be detected accurately and easily. The variable wavelength interference filter 5 is easily configured by disposing the fixed substrate 51 provided with the fixed reflective film 54 and the fixed electrode 561 and the movable substrate 52 provided with the movable reflective film 55 and the movable electrode 562 facing each other. can do. Here, each of the substrates 51 and 52 can be formed with a thickness of, for example, 1 mm or less, and the gap dimension of the gap G1 between the reflection films may be set to, for example, 1 μm or less according to the wavelength of light to be transmitted. Therefore, for example, compared to the case where a spectroscopic element such as AOTF or LCTF is used, the size and thickness can be reduced, and the photometric device 30 can also be reduced in size and thickness (for example, about 6.5 mm). Therefore, it can be sufficiently stored in the bezel portion 12 of the display unit 10 and can be mounted on the image display device 1 with a simple configuration.

  In the present embodiment, the photometric device 30 is provided so as to be rotatable with respect to the bezel portion 12 by a rotation shaft 32, and can advance and retract from the storage portion 121 of the bezel portion 12 toward the display 11. For this reason, the photometric device 30 can be accommodated in the accommodating portion 121 of the bezel portion 12 when the colorimetric processing is not performed (when a normal image is displayed on the display 11). Further, as described above, the photometric device 30 using the wavelength tunable interference filter 5 can be easily reduced in size and thickness, and the bezel portion 12 has a large size even when the storage portion 121 is provided in the bezel portion 12. It will not become.

[Second Embodiment]
In the first embodiment described above, the second optical sensor 342 that receives the light incident from the first light incident hole 331 and transmitted through the wavelength variable interference filter 5 and the wavelength variable interference incident from the second light incident hole 332. The first optical sensor 341 that receives the light transmitted through the filter 5 and the two optical sensors 341 and 342 are provided. On the other hand, in the second embodiment, only the second light receiving circuit board 352A and the second photosensor 342A are provided as the light receiving unit in the housing 31. In addition, in 2nd embodiment, the same number is attached | subjected about the member similar to 1st embodiment, and description is abbreviate | omitted.
FIG. 8 is a cross-sectional view illustrating a schematic configuration of a photometric device of the image display device according to the second embodiment.
As shown in FIG. 8, the image display device 1A according to the second embodiment includes a photometric device 30A. The photometric device 30A is different from the first embodiment in the configuration inside the housing 31. For this reason, the structure in the housing | casing 31 is demonstrated in detail below.

  Inside the housing 31, as shown in FIG. 8, the variable wavelength interference filter 5 as the spectral filter of the present invention, the optical sensor 342A and the light receiving circuit board 352A constituting the light receiving unit of the present invention, the filter control circuit 36, Mirrors 371 and 372 constituting the second light guide optical system of the present invention, mirrors 381 and 382 constituting the first light guide optical system of the present invention, and a light shielding plate 392 are arranged.

On the inner surface of the first light-shielding portion 311, a mirror 371 having a right-angled triangular cross section and a mirror 372 having the same shape as the mirror 371 have their inclined surfaces (reflecting surfaces that reflect light) facing each other, that is, It arrange | positions at the said inner surface so that a reflective surface may oppose. These mirrors 371 and 372 are provided so as to be able to advance and retreat along the arrow C1 shown in FIG. That is, the mirrors 371 and 372 (particularly, the mirror 371) constituting the second light guide optical system are provided so as to be able to advance and retract with respect to the optical path of the light incident from the first light incident hole 331.
The second light receiving circuit board 352A is disposed on the inner side surface of the second light shielding portion 312. A second photosensor 342A is provided on the surface of the second light receiving circuit board 352A. The second light sensor 342A and the second light receiving circuit board 352A are fixed at a position separated from the second light incident hole 332 by a predetermined distance in the direction in which the rotation shaft 32 is located.
A mirror 382 having the same shape as the mirrors 371 and 372 is disposed in the vicinity of the second optical sensor 342A, and a mirror 381 having the same shape as the mirror 382 is disposed at a position facing the mirror 382. The mirror 381 and the mirror 371 provided on the inner surface of the first light shielding unit 311 described above are arranged so that the reflecting surfaces thereof face each other. Further, the mirror 382 is disposed in the vicinity of the second optical sensor 342A in a state in which the mirror 382 faces the same direction as the above-described mirror 372. These mirrors 381 and 382 are provided so as to be able to advance and retract along the arrow D1 shown in FIG. That is, the mirrors 381 and 382 constituting the first light guide optical system are provided so as to be able to advance and retract with respect to the optical path of the light incident from the second light incident hole 332.

The light shielding plate 392 is provided on the inner side surface of the second light shielding portion 312. Specifically, it is provided at a position that closes the second light incident hole 332, and is provided so as to be able to advance and retract along the arrow E1 in FIG. Thereby, the incidence of light from the second light incident hole 332 can be freely controlled by driving the light shielding plate 392. In addition, since the light shielding agent etc. are apply | coated to the surface at the side of the display 11 of the mirror 371, the incidence of light from the first light incident hole 331 can be freely controlled by moving the mirror 371 forward and backward.
The variable wavelength interference filter 5 is provided between the mirrors 371 and 372 and the mirrors 381 and 382. As described above, since the variable wavelength interference filter 5 is provided between the mirrors 371 and 372 and the mirrors 381 and 382, the light incident from either the first light incident hole 331 or the second light incident hole 332 has a wavelength. The light is supplied to the second optical sensor 342A via the variable interference filter 5 and the mirrors 371 and 372 or the wavelength variable interference filter 5 and the mirrors 381 and 382.

  In such a photometric device 30A, for example, the spectral spectrum of light output from the display 11 and the spectral spectrum of external light are received (photometrically) by one light receiving unit (second optical sensor 342A) as follows. ) The various controls shown below are controlled by the control unit 40 as in the first embodiment. For example, when receiving light incident from the first light incident hole 331 and passing through the wavelength variable interference filter 5, the mirrors 371 and 372 are rotated by the rotation shaft 32 so that external light can be incident from the first light incident hole 331. Is retracted in the direction, the light shielding plate 392 is moved in the direction of the rotation axis 32, the second light incident hole 332 is blocked, and the mirror 381 is positioned at a position coincident with the optical axis of the light incident from the first light incident hole 331. Move. As a result, the light output from the display 11 incident from the first light incident hole 331 is incident on the wavelength variable interference filter 5, and the light having a predetermined wavelength among the incident light is supplied to the mirror 381. The light supplied to the mirror 381 is reflected by the reflecting surface of the mirror 381 and supplied to the mirror 382. The light supplied to the mirror 382 is reflected by the reflecting surface of the mirror 382 toward the second optical sensor 342A and supplied to the second optical sensor 342A. That is, the light incident from the first light incident hole 331 is supplied to the second photosensor 342A along the broken line L1 in FIG.

Further, when receiving light that has entered through the second light incident hole 332 and passed through the wavelength variable interference filter 5, the light shielding plate 392 and the rotation shaft 32 are arranged so that external light can enter through the second light incident hole 332. Retreat in the reverse direction. The first light incident hole 331 is closed by arranging the mirror 371 on the optical path of the light incident from the first light incident hole 331. As a result, the light output from the display 11 incident from the second light incident hole 332 is incident on the wavelength tunable interference filter 5, and light having a predetermined wavelength among the incident light is supplied to the mirror 371. The light supplied to the mirror 371 is reflected by the reflecting surface of the mirror 371 and supplied to the mirror 372. The light supplied to the mirror 372 is reflected by the reflecting surface of the mirror 372 toward the second photosensor 342A and supplied to the second photosensor 342A. That is, the light incident from the second light incident hole 332 is supplied to the second photosensor 342A along the broken line L2 in FIG.
As described above, when the light incident from the first light incident hole 331 is measured, the second light incident hole 332 is closed by the mirror 371, while the incident from the second light incident hole 332. When the measured light is measured, the first light incident hole 331 is blocked by the light shielding plate 392. Thereby, the incident light can be independently received (photometric) by the second optical sensor 342A.

[Operational effects of the second embodiment]
In the present embodiment, light output from the display 11 enters the housing 31 through the first light incident hole 331, and the incident light is converted into light having a predetermined wavelength via the wavelength variable interference filter 5 and the mirrors 381 and 382. It is supplied toward the second light sensor 342A. In addition, external light enters the housing 31 through the second light incident hole 332, and the incident light is directed toward the second optical sensor 342A as light of a predetermined wavelength via the wavelength variable interference filter 5 and the mirrors 371 and 372. Supplied. The second optical sensor 342A independently generates light having a predetermined wavelength based on light incident from the first light incident hole 331 and light having a predetermined wavelength based on light incident from the second light incident hole 332. Receive light. That is, since light of a predetermined wavelength based on the light incident from the first light incident hole 331 and the second light incident hole 332 is not simultaneously received, even one second photosensor 342A can be viewed from two directions. Incident light can be received. Thereby, by using one wavelength variable interference filter 5 and one second optical sensor 342A, the light incident into the housing 31 from different directions is reliably received by the second optical sensor 342A and measured. Color accuracy can be increased.
That is, according to the device using the photometric device 30A of the present invention, for example, the image display device 1A, the display color of the display 11 is appropriately color-corrected using the highly accurate received light data acquired by the photometric device 30A. be able to.

[Third embodiment]
In the first embodiment described above, the first light incident hole 331 and the second light incident hole 332 are arranged coaxially in a plan view as viewed from the display 11, and the first light sensor 341, the first light receiving circuit board 351, The two-light sensor 342 and the second light receiving circuit board 352 are provided in the housing 31 so as to be able to advance and retreat. On the other hand, in the third embodiment, the wavelength variable interference filter 5 is provided so as to be movable back and forth. In addition, in 3rd embodiment, the same number is attached | subjected about the member similar to 1st embodiment, and description is abbreviate | omitted.
FIG. 9 is a cross-sectional view illustrating a schematic configuration of a photometric device of the image display device according to the third embodiment.
As shown in FIG. 9, the image display device 1B according to the third embodiment includes a photometric device 30B. The photometric device 30B is different from the first embodiment in the configuration inside the housing 31. For this reason, the structure in the housing | casing 31 is demonstrated in detail below.

  Inside the housing 31, as shown in FIG. 9, the variable wavelength interference filter 5B as the spectral filter of the present invention, the optical sensors 341B and 342B and the light receiving circuit boards 351B and 352B constituting the light receiving unit of the present invention, the filter A control circuit 36 and light shielding plates 391B and 392B are disposed.

A first light incident hole 331B is provided in a part of the first light shielding part 311, and a second light incident hole 332B is provided in a part of the second light shielding part 312. The first light incident hole 331B and the second light incident hole 332B are provided at different positions in plan view as viewed from the display 11, and the first light incident hole 331B is closer to the rotating shaft 32 than the second light incident hole 332B. Is provided.
The first light receiving circuit substrate 351B is disposed on the inner side surface of the first light shielding portion 311 and at a position facing the second light incident hole 332B. The first light sensor 341B is provided on the surface of the first light receiving circuit board 351B and on the optical path of the light incident from the second light incident hole 332B.
The second light receiving circuit substrate 352B is disposed on the inner surface of the second light shielding portion 312 and at a position facing the first light incident hole 331B. A second light sensor 342B is provided on the surface of the second light receiving circuit board 352B and on the optical path of the light incident from the first light incident hole 331B.
In addition, the first light receiving circuit board 351 and the second light receiving circuit board 352 are connected to the control unit 40 of the image display device 1, and the detection results of each of the optical sensors 341 </ b> B and 342 </ b> B (detection signals based on the detected light quantity) ) Is output to the control unit 40.

The light shielding plate 391 </ b> B is provided on the inner side surface of the second light shielding portion 312. Specifically, it is provided at a position that closes the first light incident hole 331B, and is provided so as to advance and retreat along the arrow H1 in FIG. Thereby, the incidence of light from the first light incident hole 331 can be freely controlled by driving the light shielding plate 391B. Further, the light shielding plate 392B is provided on the inner side surface of the second light shielding portion 312. Specifically, it is provided at a position that closes the second light incident hole 332B, and is provided so as to advance and retreat along the arrow H2 in FIG. Thereby, the incidence of light from the second light incident hole 332B can be freely controlled by driving the light shielding plate 392B.
The wavelength variable interference filter 5B is provided between the first light-shielding part 311 and the second light-shielding part 312, that is, the first light sensor 341B provided on the first light-shielding part 311 side and the second light-shielding part 312 side. It is provided between the optical sensor 342B. The wavelength variable interference filter 5B is provided so as to be able to advance and retract along the arrow F1 shown in FIG.

In such a photometric device 30, for example, the spectral spectrum of light output from the display 11 and the spectral spectrum of external light are received (photometric) by the optical sensors 341B and 342B as follows. For example, when receiving light incident from the second light incident hole 332B and passing through the wavelength variable interference filter 5B, the light shielding plate 392B is retracted so that external light can be incident from the second light incident hole 332B. The plate 391B is disposed so as to overlap the first light incident hole 331B, the first light incident hole 331B is closed, and the wavelength variable interference filter 5B is disposed on the optical path of the light incident from the second light incident hole 332. Thereby, the external light incident from the second light incident hole 332 is incident on the wavelength variable interference filter 5B, and the light having a predetermined wavelength is incident on the first optical sensor 341B among the incident light.
Further, when receiving light incident from the first light incident hole 331B and passing through the wavelength variable interference filter 5B, the light shielding plate 391B is provided so that light output from the display 11 can be incident from the first light incident hole 331B. By retracting, the light shielding plate 392B is arranged so as to overlap the second light incident hole 332B, the second light incident hole 332B is closed, and the wavelength variable interference filter 5B is placed on the optical path of the light incident from the first light incident hole 331B. To place. As a result, the light output from the display 11 that has entered through the first light incident hole 331B enters the wavelength variable interference filter 5B, and among the incident light, light having a predetermined wavelength enters the second optical sensor 342B. Is done.
That is, when measuring light incident from the first light incident hole 331B, the second light incident hole 332B is closed by the light shielding plate 392B, while being incident from the second light incident hole 332B. When the light to be measured is measured, the first light incident hole 331B is blocked by the light shielding plate 391B. Thereby, each light sensor 341B, 342B can receive light (photometric) independently of incident light.

[Effects of third embodiment]
In the present embodiment, light output from the display 11 enters the housing 31 through the first light incident hole 331B, and the incident light is converted into light having a predetermined wavelength via the wavelength variable interference filter 5B. Incident toward In addition, external light enters the housing 31 from the second light incident hole 332B, and the incident light is supplied toward the first optical sensor 341B as light having a predetermined wavelength via the variable wavelength interference filter 5B. In this case, the wavelength variable interference filter 5 </ b> B moves to split the light incident in the housing 31. For this reason, the positions of the first light incident hole 331B and the second light sensor 342B and the positions of the second light incident hole 332B and the first light sensor 341B are not moved. As a result, the optical sensors 341B and 342B are always positioned on the optical path of the incident light supplied into the housing 31, so that the optical sensors 341B and 342B reliably receive the light via the wavelength variable interference filter 5. it can. As a result, even with the single tunable interference filter 5B, light incident on the housing 31 from different directions can be reliably received by the optical sensors 341B and 342B, and the colorimetric accuracy can be improved. .
That is, according to the apparatus using the photometric device 30B of the present invention, for example, the image display device 1B, the display color of the display 11 is appropriately color-corrected using the highly accurate received light data acquired by the photometric device 30B. be able to.

[Modification]
The present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
The bezel unit 12 or the photometric devices 30, 30A, 30B may be provided with a drive mechanism for automatically moving the photometric devices 30, 30A, 30B from the bezel unit 12 toward the display 11 side. In this case, for example, a gear is formed on the rotation shaft 32, and the driving force of the drive motor is transmitted to the gear to rotate the photometric devices 30, 30A, 30B. In this configuration, by controlling the drive motor under the control of the control unit 40, the photometry devices 30, 30A, 30B can be automatically advanced and retracted from the bezel 12 to the display 11 side.

  Moreover, although the example which provides the wavelength variable interference filter 5 in the housing | casing 31 was shown, it is not limited to this. For example, two wavelength variable interference filters 5 may be provided, and the fixed substrate 51 of the wavelength variable interference filter 5 may be provided on each of the optical sensors 341 and 342. In this case, for example, the fixed substrate 51 and the optical sensors 341 and 342 may be joined with a transparent resin or the like. Thereby, an air layer is not interposed between each photosensor 341,342 and the fixed board | substrate 51, and a light quantity loss can be suppressed.

  In each of the above-described embodiments, the configuration in which the single photometric device 30, 30A, 30B is provided is exemplified. However, for example, a configuration in which two or more photometric devices are provided may be employed. In this case, the device profile data can be corrected based on the light output from the plurality of pixels of the display 11.

In the above embodiments, the stationary image display device 1 as shown in FIG. 1 is illustrated as the image display device of the present invention, but the present invention is not limited to this. In addition, the image display device of the present invention can be applied to a display device such as a portable terminal device such as a mobile phone or a smartphone.
In each of the above embodiments, the photometric devices 30, 30A, 30B of the present invention are applied to the image display device 1, but the present invention is not limited to this. The photometric devices 30, 30A, 30B of the present invention can also be applied to various devices such as printers and cameras provided in portable terminal devices.

Further, as an example of the spectral filter of the present invention, the wavelength variable interference filter 5 is illustrated in each of the above embodiments, but the present invention is not limited to this. Any configuration may be used as long as it is a spectral filter that can be stored in the bezel portion 12, and for example, a linear variable filter or the like may be used.
Further, as the wavelength tunable interference filter 5, a fixed reflective film 54 as a first reflective film is provided on a fixed substrate 51 as a first substrate, and a movable as a second reflective film is provided on a movable substrate 52 as a second substrate. Although the configuration in which the reflective film 55 is provided is illustrated, the present invention is not limited to this. For example, the first substrate and the second substrate may not be provided. In this case, for example, the first reflective film is provided on one surface of the parallel glass substrate, the second reflective film is provided on the other surface parallel to the one surface, and then the parallel glass substrate is etched by etching or the like. In this configuration, the first substrate and the second substrate are not provided, and the spectral element can be made thinner. In this case, the gap dimension between the reflective films can be maintained by interposing, for example, a spacer between the first reflective film and the second reflective film. Moreover, the first electrode is provided on the first reflective film, the second electrode is provided on the second reflective film, and a drive voltage is applied between the first electrode and the second electrode, thereby The gap dimension can be changed.

  In addition, the specific structure for carrying out the present invention can be appropriately changed to other structures and the like within a range in which the object of the present invention can be achieved.

  DESCRIPTION OF SYMBOLS 1 ... Image display apparatus, 5 ... Wavelength variable interference filter, 10 ... Display part, 11 ... Display, 12 ... Bezel part, 30 ... Photometry apparatus, 31 ... Housing, 32 ... Rotary axis, 36 ... Filter control circuit, 40 DESCRIPTION OF SYMBOLS ... Control part, 42 ... Display control part, 43 ... Colorimetry processing part, 44 ... Color correction part (color correction means), 51 ... Fixed substrate, 52 ... Movable substrate, 54 ... Fixed reflection film, 55 ... Movable reflection film, 56 ... Electrostatic actuator, 311 ... First light shielding part, 312 ... Second light shielding part, 331 ... First light incident hole, 332 ... Second light incident hole, 341 ... First light sensor (first light receiving part), 342 ... second optical sensor (second light receiving part), 351 ... first light receiving circuit board (first light receiving part), 352 ... second light receiving circuit board (second light receiving part), 371, 372 ... mirror (second light guide) Optical system), 381, 382... Mirror (first light guide optical system), 4 1 ... display color measurement means, 432 ... external light colorimetric means.

Claims (8)

A first light-shielding portion provided with a first light incident hole that allows light from the first direction to pass through, and a second light incident hole provided with a second light incident hole that allows light from a second direction different from the first direction to pass through. A housing having a light shielding portion;
A spectral filter that is provided in the housing and emits light of a predetermined wavelength among incident light;
A light receiving portion provided in the housing and receiving light emitted from the spectral filter;
The light receiving unit includes light having the predetermined wavelength of incident light incident on the spectral filter from the first light incident hole and light having the predetermined wavelength of light incident on the spectral filter from the second light incident hole. And a photometric device characterized by receiving light independently of each other. The photometric device according to claim 1,
The first light incident hole and the second light incident hole are provided on the same axis. The photometric device according to claim 2,
The spectral filter is provided on a virtual axis passing through the center of the first light incident hole and the second light incident hole between the first light shielding part and the second light shielding part,
The light receiving part is provided on the first light shielding part side of the spectral filter and is movable forward and backward with respect to the optical path of light incident from the first light incident hole, and is incident on the first light incident hole. A first light-receiving unit that receives light that has entered the second light incident hole and passed through the spectral filter, and is disposed on the second light-shielding unit side of the spectral filter. The spectral filter is provided so as to be able to advance and retreat with respect to the optical path of the light incident from the two light incident holes, and is incident from the first light incident hole when arranged in the optical path of the light incident from the second light incident hole. And a second light receiving unit that receives light that has passed through the photometric device. The photometric device according to claim 2,
The spectral filter is provided on a virtual axis passing through the center of the first light incident hole and the second light incident hole between the first light shielding part and the second light shielding part,
The spectroscopic filter is provided from the second light incident hole when it is provided so as to be movable back and forth with respect to the optical path of the light incident from the first light incident hole, and disposed in the optical path of the light incident from the first light incident hole. A first light guiding optical system that guides the light incident on and emitted from the spectral filter to the light receiving unit,
The spectroscopic filter is provided from the first light incident hole when it is disposed in the optical path of the light incident from the second light incident hole. A second light guiding optical system that guides the light that is incident on and emitted from the spectral filter to the light receiving unit,
A photometric device characterized by comprising: In the photometry apparatus in any one of Claims 1-4,
The spectral filter is a tunable Fabry-Perot etalon having a pair of reflective films facing each other. The photometric device according to claim 5,
The spectral filter includes a gap changing unit that changes a gap dimension of the pair of reflective films. A first light-shielding portion provided with a first light incident hole that allows light from the first direction to pass through, and a second light incident hole provided with a second light incident hole that allows light from a second direction different from the first direction to pass through. A housing having a light shielding portion, a spectral filter provided in the housing and emitting light of a predetermined wavelength among incident light, and a light receiving portion provided in the housing and receiving light emitted from the spectral filter And the light receiving unit is configured to transmit light having the predetermined wavelength of incident light incident on the spectral filter from the first light incident hole and light incident on the spectral filter from the second light incident hole. A photometric device that independently receives light of the predetermined wavelength;
A display for displaying an image;
A control unit for controlling the display unit and the photometric device,
The first light shielding portion of the photometric device is provided to face the display portion, and the second light shielding portion is provided on the opposite side of the first light shielding portion in the photometric device,
The control unit receives the light amount of the predetermined wavelength of incident light incident on the spectral filter from the first light incident hole received by the light receiving unit and enters the spectral filter from the second light incident hole. The spectrum of the incident light is acquired based on the light having the predetermined wavelength and the amount of light incident from the first light incident hole, and the color correction of the display unit is performed based on the spectrum. An image display device comprising color correction means for performing the operation. The image display device according to claim 7,
The display section includes a display area for displaying an image, and a bezel section surrounding the display area,
The photometric device is provided so as to be able to advance and retract from the bezel portion to the display area.

Images