Classifications

• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
  • G09F19/00—Advertising or display means not otherwise provided for
  • G09F19/12—Advertising or display means not otherwise provided for using special optical effects
  • G09F19/125—Stereoscopic displays; 3D displays
• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
  • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
  • G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
  • G09G3/002—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background to project the image of a two-dimensional display, such as an array of light emitting or modulating elements or a CRT
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
  • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
  • G01J5/0022—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiation of moving bodies
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
  • G02B27/01—Head-up displays
  • G02B27/0101—Head-up displays characterised by optical features
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
  • G02B30/50—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images the image being built up from image elements distributed over a three-dimensional [3D] volume, e.g. voxels
  • G02B30/56—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images the image being built up from image elements distributed over a three-dimensional [3D] volume, e.g. voxels by projecting aerial or floating images
• • G—PHYSICS
  • G06—COMPUTING OR CALCULATING; COUNTING
  • G06F—ELECTRIC DIGITAL DATA PROCESSING
  • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
  • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
  • G06F3/011—Arrangements for interaction with the human body, e.g. for user immersion in virtual reality
• • G—PHYSICS
  • G06—COMPUTING OR CALCULATING; COUNTING
  • G06F—ELECTRIC DIGITAL DATA PROCESSING
  • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
  • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
  • G06F3/016—Input arrangements with force or tactile feedback as computer generated output to the user
• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
  • G09F19/00—Advertising or display means not otherwise provided for
  • G09F19/12—Advertising or display means not otherwise provided for using special optical effects
  • G09F19/16—Advertising or display means not otherwise provided for using special optical effects involving the use of mirrors
• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
  • G09F19/00—Advertising or display means not otherwise provided for
  • G09F19/12—Advertising or display means not otherwise provided for using special optical effects
  • G09F19/18—Advertising or display means not otherwise provided for using special optical effects involving the use of optical projection means, e.g. projection of images on clouds
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
  • G02B17/02—Catoptric systems, e.g. image erecting and reversing system
  • G02B17/06—Catoptric systems, e.g. image erecting and reversing system using mirrors only, i.e. having only one curved mirror
  • G02B17/0626—Catoptric systems, e.g. image erecting and reversing system using mirrors only, i.e. having only one curved mirror using three curved mirrors
  • G02B17/0642—Catoptric systems, e.g. image erecting and reversing system using mirrors only, i.e. having only one curved mirror using three curved mirrors off-axis or unobscured systems in which not all of the mirrors share a common axis of rotational symmetry, e.g. at least one of the mirrors is warped, tilted or decentered with respect to the other elements
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
  • G02B27/01—Head-up displays
  • G02B27/0101—Head-up displays characterised by optical features
  • G02B2027/011—Head-up displays characterised by optical features comprising device for correcting geometrical aberrations, distortion
• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
  • G09G2354/00—Aspects of interface with display user

Definitions

• the present disclosure relates to a display device and an aerial image display device.
• Patent Document 1 Conventionally, an aerial image display device described in, for example, Patent Document 1 is known.
• a display device of the present disclosure includes a display section, When the image displayed by the display unit includes a high-temperature image portion showing a high-temperature object having a temperature higher than a predetermined temperature, the high-temperature image portion is displayed using light including infrared light.
• An aerial image display device of the present disclosure includes a display section having a display surface; a reflective optical system that reflects image light of the image displayed on the display surface and forms a real aerial image; When the image includes a high-temperature image portion showing a high-temperature object having a temperature higher than a predetermined temperature, the high-temperature image portion is displayed on the display surface using light including infrared light.
• FIG. 1 is a diagram showing the configuration of an aerial image display device according to an embodiment of the present disclosure, and is a side view and a block diagram of main parts. It is a figure which shows the structure of the aerial image display apparatus of other embodiment of this indication, and is a side view and a block diagram of a principal part.
• 1A is a cross-sectional view showing an example of a display section of the aerial image display device of FIG. 1A.
• FIG. 2A is a plan view showing an example of an arrangement of a plurality of visible light emitting sections and a plurality of infrared light emitting sections in the display section of FIG. 2A.
• FIG. 1A is a cross-sectional view showing another example of the display section of the aerial image display device of FIG. 1A.
• FIG. 4A is a plan view showing an example of an arrangement of a plurality of visible light emitting sections and a plurality of infrared light emitting sections in the display section of FIG. 4A.
• FIG. 4A is a plan view showing another example of the arrangement of a plurality of visible light emitting sections and a plurality of infrared light emitting sections in the display section of FIG. 4A.
• FIG. 1A is a diagram illustrating the definition of the degree of curvature of the first concave mirror in the reflective optical system of the aerial image display device of FIG. 1A, and is a cross-sectional view of the first concave mirror.
• FIG. 2A is a plan view showing another example of the arrangement of a plurality of visible light emitting sections and a plurality of infrared light emitting sections in the display section of FIG. 2A.
• FIG. 4A is a plan view showing another example of the arrangement of a plurality of visible light emitting sections and a plurality of infrared light emitting sections in the display section of FIG. 4A.
• FIG. 1A is a diagram illustrating the definition of the degree of curvature of the first concave mirror in the reflective optical system of the aerial image display device of FIG. 1A, and is a cross-sectional view of the first concave mirror.
• FIG. 2A is a plan view showing another example of the arrangement of a plurality of visible light emitting sections
• FIG. 10 is a diagram for explaining the effects of the aerial image display device of FIG. 9, and is a side view of a user's hand and its surroundings.
• FIG. It is a figure which shows the structure of the aerial image display apparatus of other embodiment of this indication, and is a side view and a block diagram of a principal part.
• Patent Document 1 discloses an aerial image display device including a display device that emits infrared light.
• Patent Document 1 There is a need to provide users with a new video experience.
• the conventional display device and aerial image display device described in Patent Document 1 do not provide users with a new video experience using infrared light.
• the aerial image display device according to the embodiment may include well-known components such as a drive circuit, a circuit board, a wiring conductor, and a case, which are not shown.
• the drawings referred to below are schematic, and the dimensional ratios, etc. on the drawings do not necessarily correspond to the actual ones. Further, in some of the drawings, an orthogonal coordinate system XYZ is defined for convenience.
• FIG. 1A and 1B are diagrams showing the configuration of an aerial image display device according to two embodiments of the present disclosure
• FIG. 2A is a cross-sectional view showing an example of a display section of the aerial image display device of FIG. 2B is a plan view showing an example of the arrangement of a plurality of visible light emitting sections and a plurality of infrared light emitting sections in the display section of FIG. 2A
• FIG. 3 is a front view showing an example of an image displayed on the display section.
• FIG. 4A is a sectional view showing another example of the display section of the aerial image display device of FIG. 1A
• FIG. 4B is a cross-sectional view of a plurality of visible light emitting sections and a plurality of infrared light emitting sections in the display section of FIG. 4A.
• 4C is a plan view showing an example of an arrangement, and FIG. 4C is a plan view showing another example of an arrangement of a plurality of visible light emitting parts and a plurality of infrared light emitting parts in the display section of FIG. 4A.
• FIG. 5 is a cross-sectional view of the first concave mirror for explaining the definition of the degree of curvature of the first concave mirror in the reflective optical system of the aerial image display device of FIG. 1A.
• FIG. 6 is a plan view showing another example of the arrangement of the plurality of visible light emitting parts and the plurality of infrared light emitting parts in the display part of FIG. 2A
• FIG. FIG. 7 is a plan view showing another example of the arrangement of a light emitting section and a plurality of infrared light emitting sections.
• the aerial images are shown with hatching.
• FIG. 2A shows a cross section taken along section line IIA-IIA in FIG. 2B.
• FIG. 4A shows a cross section taken along the section line IVA-IVA in FIG. 4B.
• infrared light emitting parts infrared light emitting elements
• hatching infrared light emitting elements
• the display device of the present disclosure includes a display section, and when an image displayed by the display section includes a high-temperature image section that reflects a high-temperature object having a temperature higher than a predetermined temperature, the display device uses light including infrared light to display a high-temperature image.
• This is a configuration that displays the section. For example, as shown in FIG. 3, when the display device has a display surface 2a and the image 4 displayed by the display surface 2a includes a high-temperature image section 43 that reflects a high-temperature object whose temperature is higher than a predetermined temperature, The high temperature image portion 43 is displayed using light including infrared light.
• the above configuration provides the following effects.
• the high-temperature image portion 43 of the image 4 is displayed using light (visible light) that includes infrared light, so the user (also referred to as a viewer) cannot see the high-temperature image portion 43 of the visible light.
• the image portion 43 can be perceived visually and by a thermal sensation (for example, a skin sensation, hereinafter also referred to as a "warm sensation").
• a thermal sensation for example, a skin sensation, hereinafter also referred to as a "warm sensation"
• the display device may include the display section 2, a casing that houses the display section 2, a support member/pedestal that supports the casing, and the like.
• the display section 2 may be a transmissive display section 2, and in that case, it may be a liquid crystal display section including a backlight and a liquid crystal panel.
• the backlight may be a direct type backlight having a plurality of light emitting parts arranged two-dimensionally on the back side of the liquid crystal panel.
• the plurality of light emitting sections include a plurality of visible light emitting sections and a plurality of infrared light emitting sections.
• the backlight may include a substrate, and the plurality of visible light emitting sections and the plurality of infrared light emitting sections may be arranged alternately in a matrix on one surface (also referred to as a light emitting surface) of the substrate.
• the visible light emitting section and the infrared light emitting section may be composed of self-luminous elements such as light emitting diodes (LEDs) and organic light emitting diodes (OLEDs).
• the display section 2 of the display device is not limited to a transmissive display section 2, but may be a self-luminous display section 2 including a plurality of self-luminous elements.
• the self-luminous element may be an LED, an OLED, or the like.
• the self-luminous display section 2 includes a plurality of pixels. Each of the plurality of pixels may include a visible light emitting section and an infrared light emitting section.
• the self-luminous display section 2 may include a substrate, and a plurality of visible light emitting sections and a plurality of infrared light emitting sections may be arranged alternately in a matrix on the light emitting surface of the substrate.
• the image 4 displayed by the display section 2 includes a high temperature image section 43 that reflects a high temperature object at a temperature higher than a predetermined temperature (for example, room temperature), if it is a liquid crystal display, the high temperature image section 43 in the backlight The corresponding infrared light emitting section is made to emit light. If the display section 2 is of a self-luminous type, the infrared light emitting section corresponding to the high temperature image section 43 is caused to emit light. The light emission intensity of the infrared light emitting section may be controlled according to the assumed temperature of the high temperature image section 43.
• the emission intensity of the infrared light emitting section is controlled by, for example, controlling the current input to the infrared light emitting section and the applied voltage by a light emission control section connected to the display section 2 or a light emission control section provided in the display section 2. You can do this by doing If the high temperature image section 43 is a person, animal, character, etc., the light emission intensity of the infrared light emitting section is controlled so that the user perceives a warm sensation corresponding to the body temperature of the person (approximately 35° C. to 37° C.). You may.
• the high-temperature image section 43 is a heating element, for example hot water (approximately 38°C to 42°C)
• the emission intensity of the infrared light emitting section is adjusted so that the user perceives a warm sensation corresponding to hot water. May be controlled.
• the high-temperature image section 43 is a heating element, for example a flame, it emits infrared light so that the user perceives a warm sensation (approximately 40 to 50 degrees Celsius) when the user holds his or her hand over the flame.
• the light emission intensity of the part may be controlled.
• the emission intensity of the infrared light emitting section is adjusted so that the user perceives a warm sensation (approximately 30 to 50 degrees Celsius) corresponding to solar heat. May be controlled.
• the display device may distinguish between the high temperature image portion 43 and the non-high temperature image portion in the image 4 displayed on the display unit 2 as follows.
• the display device includes a light emission control section, and is configured to store image data for each frame in the light emission control section, and is configured to store image data of the high temperature image section 43 (also referred to as high temperature image data) in a distinguishable manner in the image data.
• image data also referred to as high temperature image data
• a configuration may also be adopted in which end flag data, end tag data, etc. indicating .
• the process of adding start flag data, start tag data, etc. to high temperature image data, and the process of adding end flag data, end tag data, etc. may be performed manually. Further, the process of adding start flag data, start tag data, etc. to the high temperature image data, and the process of adding end flag data, end tag data, etc., are performed by capturing the image 4 displayed on the display unit 2 using an imaging device such as a camera. The determination may be performed based on capturing an image, analyzing the captured image (captured image) using analysis program software, and identifying the high temperature image portion 43 in the captured image.
• the analysis program software may include artificial intelligence (AI) program software that performs image recognition to analyze captured images and detect and extract specific patterns.
• the AI program software may perform image recognition by directly analyzing image data to detect and extract specific patterns.
• the display device can be applied to various electronic devices.
• the electronic devices include automobile route guidance systems (car navigation systems), ship route guidance systems, aircraft route guidance systems, indicators for instruments of vehicles such as automobiles, instrument panels, smartphone terminals, mobile phones, tablet terminals, personal Digital assistants (PDAs), video cameras, digital still cameras, electronic notebooks, electronic books, electronic dictionaries, personal computers, copiers, game equipment terminals, televisions, product display tags, price display tags, industrial programmable displays equipment, car audio, digital audio players, facsimiles, printers, automated teller machines (ATMs), vending machines, medical display devices, digital display watches, smart watches, information display devices installed at stations, airports, etc. , advertising signage (digital signage), head mounted display (HMD), etc.
• PDAs personal Digital assistants
• video cameras digital still cameras
• electronic notebooks electronic books
• electronic dictionaries personal computers
• copiers game equipment terminals
• televisions product display tags
• price display tags industrial programmable displays equipment
• the aerial image display device 1 of this embodiment includes a display section (hereinafter also referred to as a display device) 2 and a reflective optical system 3, as shown in FIG. 1A.
• the display device 2 has a display surface 2a, and displays an image 4 that propagates to the reflective optical system 3 (first concave mirror 31) side as image light L on the display surface 2a.
• the display device 2 can display an image 4 (an example is shown in FIG. 3) composed of a visible light image including infrared light.
• the display device 2 emits image light L from the display surface 2a.
• the image light L may include at least one of visible light L1 and infrared light L2. Therefore, in some cases, the image light L may be composed only of the visible light L1, and in other cases, the image light L may be composed only of the infrared light L2.
• the reflective optical system 3 reflects the image light L of the image 4 displayed on the display surface 2a, and forms an image as a real aerial image R. Thereby, the user 5 can perceive an aerial image R formed by forming the image light L.
• the image light L consists only of the visible light L1
• the user 5 can visually perceive a visible light aerial image R1 formed by forming the visible light L1.
• the image light L includes visible light L1 and infrared light L2
• the user 5 can visually perceive a visible light aerial image R1 formed by forming an image of visible light L1, and a visible light aerial image R1 formed by forming an image of infrared light L2.
• the temperature of the infrared light aerial image R2 can be perceived by sensation (for example, skin sensation).
• the reflective optical system 3 includes reflective optical elements such as a concave mirror and a convex mirror.
• the display device 2 may be a transmissive display device 2 shown in FIG. 2A.
• the transmissive display device 2 may be a liquid crystal display device including a backlight 21 and a liquid crystal panel 22.
• the backlight 21 may be a direct type backlight having a plurality of light emitting parts arranged two-dimensionally on the back side (that is, the light incident surface) of the liquid crystal panel 22.
• the plurality of light emitting sections include a plurality of visible light emitting sections 21a and a plurality of infrared light emitting sections 21b.
• the backlight 21 has a substrate 23, and a plurality of visible light emitting parts 21a and a plurality of infrared light emitting parts 21b are arranged in a matrix alternately on a first surface 23a of the substrate 23. They may be arranged in a shape.
• the visible light emitting section 21a and the infrared light emitting section 21b may be composed of self-luminous elements such as light emitting diodes (LEDs) and organic light emitting diodes (OLEDs).
• the substrate 23 may be a glass substrate, a plastic substrate, a metal substrate, a ceramic substrate, etc., or may be a composite substrate in which multiple types of these are laminated.
• the visible light emitting section 21a may emit white light.
• the visible light emitting section 21a may include a red LED that emits red light, a green LED that emits green light, and a blue LED that emits blue light.
• the visible light emitting section 21a may include a white LED that emits white light.
• the white LED may include an ultraviolet LED that emits ultraviolet light and a phosphor that converts the wavelength of the ultraviolet light emitted from the ultraviolet LED into white light.
• the white LED may include a blue LED that emits blue light and a phosphor that converts the wavelength of the blue light emitted from the blue LED into white light.
• the infrared light emitting section 21b may be an infrared LED that emits infrared light.
• the infrared LED may be a near-infrared LED that emits near-infrared light or infrared light with a wavelength of about 0.78 ⁇ m to 2.5 ⁇ m. Note that “ ⁇ ” means “to”, and the same applies hereinafter.
• the liquid crystal panel 22 may include a first polarizing plate, a color filter substrate, a liquid crystal layer, an array substrate, and a second polarizing plate.
• the liquid crystal panel 22 includes a plurality of pixels.
• the pixel includes a red light emitting subpixel, a green light emitting subpixel, and a blue light emitting subpixel.
• the pixel may include a subpixel for infrared light emission. Since infrared light has a higher transmittance through the liquid crystal panel 22 than visible light, the pixel does not need to include a subpixel for infrared light emission.
• the red light emitting sub-pixel converts the white light emitted from the visible light emitting section 21a into red light (red colored light) using the red filter section of the color filter substrate, and controls the amount of red light transmitted.
• the amount of red light transmitted may be controlled by controlling the amount of light of a white LED corresponding to a red light emitting subpixel.
• the red light emitting subpixel may be one that utilizes red light emitted by a red LED in the visible light emitting section 21a corresponding to the subpixel. In this case, the amount of red light transmitted may be controlled by controlling the amount of light from the red LED.
• the configuration of the above subpixel can also be applied to a subpixel for green light emission and a subpixel for blue light emission.
• the red light emitting subpixel, the green light emitting subpixel, and the blue light emitting subpixel may block infrared light emitted from the infrared light emitting section 21b to some extent.
• the sub-pixel for infrared emission emits infrared light from an infrared LED serving as an infrared light emitting section 21b corresponding to the sub-pixel. It may also be possible to use The amount of infrared light transmitted through the sub-pixel for infrared light emission may be controlled by controlling the amount of light from the infrared LED.
• the infrared light emitted by an infrared light LED or the like as the infrared light emitting section 21b is transmitted through a subpixel for red light emission, a subpixel for green light emission, and a configuration in which at least one of the subpixels for blue light emission is transmitted.
• the amount of infrared light transmitted through the pixel may be controlled by controlling the amount of light from an infrared LED or the like.
• the display device 2 can display a visible light image including infrared light on the display surface 2a in response to an image signal input from the outside.
• the display device 2 may have a local dimming function. That is, the display device 2 can individually control the intensity of white light emitted by each of the plurality of visible light emitting parts 21a, and the intensity of the white light emitted by each of the plurality of visible light emitting parts 21b, according to an image signal input from the outside. It may be possible to individually control the intensity of infrared light emitted by each of them. In this case, the contrast and color tone of the image 4 can be improved, and as a result, the contrast and color tone of the aerial image R can be improved. Moreover, the power consumption of the display device 2 can also be reduced.
• FIG. 2B shows an example in which the number of visible light emitting parts 21a and the number of infrared light emitting parts 21b are the same; The number may be less than the number of visible light emitting parts 21a.
• the infrared light emitted from the infrared light emitting section 21b is more easily transmitted through the liquid crystal panel 22 than the visible light (white light) emitted from the visible light emitting section 21a. Even when the number of visible light emitting parts 21b is smaller than the number of visible light emitting parts 21a, sufficient intensity of the infrared light L2 can be maintained.
• the display device 2 is not limited to a transmissive display device 2, but may be a self-luminous display device 2 including a plurality of self-luminous elements.
• the self-luminous display device 2 includes a plurality of pixels 24 (shown in FIG. 4A). Each of the plurality of pixels 24 includes a visible light emitting section 24a and an infrared light emitting section 24b.
• the self-luminous display device 2 has a substrate 23, as shown in FIGS. 4A and 4B, and a plurality of visible light emitting sections 24a and a plurality of infrared light emitting sections 24b are arranged on a first surface 23a of the substrate 23. They may be arranged alternately in a matrix.
• the plurality of visible light emitting sections 24a each include a red light emitting element 24aR that emits red light, a green light emitting element 24aG that emits green light, and a blue light emitting element 24aB that emits blue light.
• Each of the plurality of infrared light emitting sections 24b has an infrared light emitting element 24bI that emits infrared light.
• the red light emitting element 24aR, the green light emitting element 24aG, the blue light emitting element 24aB, and the infrared light emitting element 24bI may be composed of, for example, an LED, an OLED, or the like.
• the red light emitting element 24aR, the green light emitting element 24aG, the blue light emitting element 24aB, and the infrared light emitting element 24bI may be configured with micro LEDs.
• the micro LED may have a rectangular planar shape in which the length of one side is approximately 1 ⁇ m or more and approximately 100 ⁇ m or less, or approximately 3 ⁇ m or more and approximately 10 ⁇ m or less when disposed on the first surface 23a. .
• the infrared light-emitting element 24bI is a near-infrared LED, an infrared LED, a near-infrared OLED, and an infrared OLED that emit near-infrared light or infrared light with a wavelength of about 0.78 ⁇ m to 2.5 ⁇ m. Good too.
• the self-luminous display device 2 individually adjusts the light emitting intensity of the plurality of visible light emitting sections 24a (i.e., the red light emitting element 24aR, the green light emitting element 24aG, and the blue light emitting element 24aB) according to an image signal input from the outside.
• the light emitting intensity of the plurality of infrared light emitting sections 24b is individually controlled.
• the self-luminous display device 2 can display an image 4 composed of a visible light image and an infrared light image on the display surface 2a. Note that although the infrared light image cannot be directly perceived by human vision, the infrared light image portion in the aerial image R and its surroundings can be perceived by the human sense of touch. Therefore, the infrared light image can also be called an infrared light temperature sensing section.
• the red light emitting element 24aR, green light emitting element 24aG, blue light emitting element 24aB, and infrared light emitting element 24bI of each pixel of the self-luminous display device 2 are arranged in the row direction of the display device 2 (FIG. 4B). may be arranged in the left-right direction).
• the red light emitting element 24aR, green light emitting element 24aG, blue light emitting element 24aB, and infrared light emitting element 24bI of each pixel may be arranged in a matrix of 2 rows and 2 columns, as shown in FIG. 4C.
• the aerial image display device 1 includes a light emission control section 6, as shown in FIG. 1A.
• the light emission control unit 6 controls the image 4 displayed on the display surface 2a based on an image signal input from the outside.
• the image signal includes a visible light image signal SV and an infrared light image signal SI.
• the light emission control unit 6 displays a visible light image on the display surface 2a based on the visible light image signal SV, and mixes infrared light on the display surface 2a based on the infrared light image signal SI. That is, the light emission control unit 6 controls the display device 2 to mix infrared light with the visible light image.
• the light emission control unit 6 may include one or more processors.
• the processor may include a general-purpose processor configured to load a specific program and execute a specific function, and a dedicated processor specialized for specific processing.
• the dedicated processor may include an ASIC (Application Specific Integrated Circuit).
• the processor may include a PLD (Programmable Logic Device).
• the PLD may include an FPGA (Field-Programmable Gate Array).
• the light emission control unit 6 may be an SoC (System-on-a-Chip) or an SiP (System In a Package) configured such that one or more processors cooperate with each other.
• the light emission control unit 6 may have a function of turning on and off the display device 2, a function of transmitting an image signal to the display device 2, a function of adjusting the brightness, chromaticity, frame frequency, etc. of the image, etc. . Further, when the display device 2 is equipped with a heat radiation member or a cooling member, the light emission control unit 6 may have a function of adjusting the temperature of the heat radiation member or the cooling member.
• the predetermined temperature may be defined as normal temperature as detailed below. good.
• the image 4 displayed on the display device 2 includes a normal temperature image portion 44 and a high temperature image portion 43 (an example is shown in FIG. 3). Note that the normal temperature image portion 44 is a different portion from the high temperature image portion 43 in the image 4.
• the aerial image display device 1 may distinguish between the room temperature image portion 44 and the high temperature image portion 43 in the image displayed on the display device 2 as follows.
• the light emission control section 6 may be configured to store image data for each frame, and the image data of the high temperature image section 43 (also referred to as high temperature image data) may be stored in a distinguishable manner. For example, start flag data, start tag data, etc. indicating that this is the start of high temperature image data are added to the head (start) of high temperature image data, and high temperature image data is added to the end (end) of high temperature image data.
• start flag data, start tag data, etc. indicating that this is the start of high temperature image data are added to the head (start) of high temperature image data
• high temperature image data is added to the end (end) of high temperature image data.
• a configuration may also be adopted in which end flag data, end tag data, etc. indicating that this is the end of image data are added. The process of adding start flag data, start tag data, etc.
• the process of adding start flag data, start tag data, etc. to the high temperature image data, and the process of adding end flag data, end tag data, etc. are performed by capturing the image 4 displayed on the display device 2 by using an imaging device such as a camera.
• the determination may be performed based on capturing an image, analyzing the captured image (captured image) using analysis program software, and identifying the high temperature image portion 43 in the captured image.
• the analysis program software may include artificial intelligence (AI) program software that performs image recognition to analyze captured images and detect and/or extract specific patterns.
• the AI program software may perform image recognition by directly analyzing image data to detect and/or extract specific patterns.
• the image data of the room temperature image section 44 may be made distinguishable and stored in the light emission control section 6.
• start flag data, start tag data, etc. indicating that this is the start of the room temperature image data are added to the beginning part (start part) of the room temperature image data
• the end part (end part) of the room temperature image data is added to the end part (end part) of the room temperature image data.
• a configuration may also be adopted in which end flag data, end tag data, etc. indicating that this is the end of image data are added.
• the process of adding start flag data, start tag data, etc. to the room temperature image data, and the process of adding end flag data, end tag data, etc. may be performed in the same manner as described above.
• the normal temperature may be, for example, 15°C to 25°C or 20°C.
• the aerial image display device 1 may include a temperature sensor 60 (shown in FIG. 1B) that detects the surrounding environmental temperature, and in this case, the normal temperature may be the environmental temperature detected by the temperature sensor 60. good.
• the user 5 may set the normal temperature to an arbitrary temperature or an arbitrary temperature range. This is because the temperature and temperature range that is recognized as normal temperature tend to differ depending on the user's 5's place of birth, place of residence, etc. In this case, the user 5 may set the normal temperature to an arbitrary temperature or arbitrary temperature range within the range of, for example, about 0°C to 35°C, but is not limited to the range of about 0°C to 35°C.
• the aerial image display device 1 stores image data SD (shown in FIG. 1B), or converts high temperature image data SDH (shown in FIG. 1B) of the high temperature image section 43 into room temperature image data SDL (shown in FIG. 1B) in the image data SD.
• the light emission control unit 6 includes a storage unit 50 that stores the information in a distinguishable manner.
• the storage unit 50 may be composed of, for example, a line memory, a frame memory, or the like.
• the aerial image display device 1 may have a configuration in which the light emission control section 6 does not include the storage section 50 and is provided separately.
• the storage unit 50 may output the image data SD including the normal temperature image data SDL and the high temperature image data SDH to the light emission control unit 6 as the visible light image signal SV. Further, the storage unit 50 may generate an infrared light image signal SI based on the high temperature image data SDH, and may output the infrared light image signal SI to the light emission control unit 6.
• the aerial image display device 1 uses light including infrared light to display the high-temperature image section 43. is displayed on the display surface 2a.
• the light including infrared light may be visible light emitted from the visible light emitting parts 21a and 24a, and infrared light emitted from the infrared light emitting parts 21b and 24b.
• the aerial image display device 1 displays the normal temperature image section 44 on the display surface 2a using visible light emitted from the visible light emitting sections 21a and 24a.
• the display device 2 emits image light L including visible light L1 indicating the normal temperature image section 44 and visible light L1 and infrared light L2 indicating the high temperature image section 43 from the display surface 2a.
• the image light L is reflected by the reflective optical system 3 and formed as an aerial image R.
• the user 5 can visually perceive the visible light aerial image R1 formed by forming the visible light L1, and can also sense the temperature of the infrared light aerial image R2 formed by forming the infrared light L2 through his/her skin sensation.
• the aerial image display device 1 can provide the user 5 with a new video experience and a realistic video experience using infrared light.
• the light emission control section 6 or the storage section 50 stores data of a specific image (for example, an image of a person, an image of a fireplace, etc.) that can be the high temperature image section 43 (for example, corresponding to the high temperature image data SDH in FIG. 1B) and the temperature. may be stored in advance in association with each other.
• the display device 2 displays the image 4
• the image data of the image 4 includes specific image data
• the temperature detected by the temperature sensor 60 is associated with the data of the specific image in advance.
• a configuration may be adopted in which the normal temperature image data SDL and the high temperature image data SDH are distinguished by comparing the stored temperature with the stored temperature.
• the temperature sensor 60 may be connected to at least one of the light emission control section 6 and the storage section 50.
• the aerial image display device 1 may be capable of displaying a moving image of the high temperature image section 43.
• the user 5 can not only visually perceive the movement of the high-temperature image portion 43 (that is, the high-temperature object), but also can perceive it by skin sensation.
• the aerial image display device 1 can provide a new video experience to the user 5 using infrared light.
• the light emission control section 6 can control light emission and non-light emission of the plurality of visible light emitting sections 21a, 24a and the plurality of infrared light emitting sections 21b, 24b.
• the moving image display of the high-temperature image section 43 is made possible by the light emission control section 6 controlling light emission and non-emission of the plurality of visible light emitting sections 21a, 24a and the plurality of infrared light emitting sections 21b, 24b.
• the high temperature image section 43 is composed of a visible light image 43a and an infrared light image 43b.
• the light emission control unit 6 may set the infrared light image 43b to a size that includes the visible light image 43a on the display surface 2a of the display device 2.
• the infrared light aerial image R2 can be made large enough to include the visible light aerial image R1.
• the user 5 can be made to perceive not only the heat of the high-temperature object itself, but also the radiant heat radiated (radiated) from the high-temperature object to the surroundings or the conductive heat transferred by thermal conduction. Therefore, it is possible to provide the user 5 with a more realistic video experience.
• the light emission control unit 6 may display the high temperature image portion 43 on the display surface 2a such that the infrared light image 43b has a temperature gradient portion 43ba around the visible light image 43a.
• the temperature gradient portion 43ba is a portion where the intensity of infrared light decreases as it moves away from the center (centroid) or edge of the visible light image 43a.
• an infrared light aerial image R2 having a temperature gradient portion around the visible light aerial image R1 can be formed on the virtual imaging plane 8.
• the intensity of the infrared light L2 decreases as it moves away from the center (centroid) or edge of the visible light aerial image R1 perceived by the user 5.
• the temperature gradient of the temperature gradient portion 43ba may be about 0.1°C/mm to 10°C/mm, or about 0.1°C/mm to 3°C/mm, but is limited to this range. do not have.
• the aerial image display device 1 may include a time lag control section 7.
• the time lag control section 7 is configured to temporally delay the movement of the infrared light image 43b with respect to the movement of the visible light image 43a.
• the user 5 perceives the movement of the high-temperature object visually, and then senses the movement of the high-temperature object through the skin.
• heat transfer includes convection and conduction components, it may lag in time relative to the movement of the object. In this embodiment, it is possible to express the delay in heat transfer relative to the movement of an object.
• the time delay ⁇ t of the movement of the infrared light image 43b with respect to the movement of the visible light image 43a may be, for example, about 0.1 seconds to 1.0 seconds, but is not limited to this range. ⁇ t may be determined based on, for example, the size (number of pixels) of the visible light image 43a, the distance between the user 5 and the virtual imaging plane 8, the thermal conductivity of air, the assumed temperature of the high-temperature object, etc. good.
• the time lag control unit 7 may gradually increase the infrared light intensity of the infrared light image 43b when the user 5 touches the high temperature image portion 43 displayed as a still image or a moving image with a finger or the like. good. That is, from the moment the user 5 touches the high-temperature image section 43 with a finger or the like, the temperature of the high-temperature object that the user 5 feels through skin sensation is gradually increased while the user 5 is touching the high-temperature image section 43. Heat transfer includes a component of thermal conduction, and since objects have heat capacity, heat is transferred from the object, which is a high-temperature object, to the user's 5 fingers, etc., and the temperature of the user 5's fingers, etc. increases.
• the temperature rise in consideration of heat conduction and heat capacity, it is possible to express a skin sensation similar to when the user's 5 finger or the like actually touches an object. For example, when the user's 5 finger touches the high temperature image area 43 displaying an animal, the user's 5 finger may gradually become warmer.
• the temperature increase rate of the infrared light image 43b may be about 0.1° C./sec to 1° C./sec, but is not limited to this range. Further, the temperature increase range may be about 3° C. to 10° C., but is not limited to this range.
• the high temperature object may be at least one of a person, an animal, a character, and a heating element.
• the character may be a popular character from animation, movies, etc., or may be a character created by the creator of the aerial image display device 1. Further, the character may be a character selected by the user 5 of the aerial image display device 1 from a plurality of samples displayed on a part of the display surface 2a.
• the heating element may be, for example, a flame, bath and spa water, heated food and drinks, the sun, etc.
• the heating element may be a natural heating element such as the sun or a heated heating element such as hot water.
• the aerial image R includes a high-temperature image section 43 that reflects a high-temperature object whose temperature is higher than a predetermined temperature (for example, room temperature), in the case of a liquid crystal display device, infrared light emission corresponding to the high-temperature image section 43 in the backlight The portion 21b is caused to emit light.
• a predetermined temperature for example, room temperature
• the display device is a self-luminous type
• the infrared light emitting section 24b corresponding to the high temperature image section 43 is caused to emit light.
• the emission intensity of the infrared light emitting sections 21b and 24b may be controlled depending on the assumed temperature of the high temperature image section.
• the light emission intensity of the infrared light emitting sections 21b and 24b can be controlled by, for example, the light emission control section 6 connected to the display device 2 or the light emission control section 6 provided in the display device 2. This may be done by controlling the input current and applied voltage. If the high temperature image section 43 is a person, animal, character, etc., the infrared light emitting sections 21b and 24b are set so that the user 5 perceives a warm sensation corresponding to their body temperature (approximately 35° C. to 37° C.). Emission intensity may also be controlled. If the high-temperature image section 43 is a heating element, for example hot water (approximately 38° C.
• the infrared light emitting sections 21b and 24b are used so that the user 5 perceives a warm sensation corresponding to hot water.
• the light emission intensity may be controlled.
• the high-temperature image section 43 is a heating element, for example a flame, it emits infrared light so that the user 5 perceives a warm sensation (approximately 40 to 50 degrees Celsius) felt when placing a hand over the flame.
• the light emission intensity of the light emitting sections 21b and 24b may be controlled.
• the high temperature image section 43 is a heat generating body, for example the sun, the infrared light emitting sections 21b, 24b are used so that the user 5 perceives a warm sensation (approximately 30° C. to 50° C.) corresponding to solar heat.
• the light emission intensity may be controlled.
• the plurality of visible light emitting parts 24a When only the plurality of visible light emitting parts 24a are made to emit light, only the visible light image can be displayed.
• the plurality of infrared light emitting sections 24b are made to emit light, only the infrared light image (warming section) can be displayed, and the warming section can also be used as a heater during cold seasons such as winter.
• a part of the image 4 may be made into a visible light image, and another part of the image 4 may be made into a temperature sensitive part. In this case, a visual sense of warmth may be provided to the user by making the visible light image a bright and bright image of the sun or the like.
• the reflective optical system 3 may include a first concave mirror 31, a convex mirror 32, and a second concave mirror 33, as shown in FIGS. 1A and 1B.
• the first concave mirror 31 is located on the optical path of the image light L emitted from the display device 2.
• the first concave mirror 31 is configured to reflect the image light L emitted from the display device 2 in a direction different from the direction toward the display device 2 .
• the convex mirror 32 is located on the optical path of the image light L reflected by the first concave mirror 31.
• the convex mirror 32 is configured to reflect the image light L reflected by the first concave mirror 31 in a direction different from the direction toward the first concave mirror 31.
• the second concave mirror 33 is located on the optical path of the image light L reflected by the convex mirror 32.
• the second concave mirror 33 is configured to reflect the image light L reflected by the convex mirror 32 in a direction different from the direction toward the convex mirror 32 and form an image as a real aerial image R. Since the reflective optical system 3 includes a plurality of reflective optical elements, it is possible to form an aerial image R with reduced distortion.
• the first concave mirror 31 has a reflective surface 31a with a degree of curvature Sa1.
• the convex mirror 32 has a reflective surface 32a with a degree of curvature of Sb.
• the second concave mirror 33 has a reflective surface 33a with a degree of curvature of Sa2.
• the degree of curvature Sa1 is determined by assuming that the length of the line segment LS connecting both ends of the reflective surface 31a is 2 ⁇ H in the cross section along the optical axis of the image light L incident on the first concave mirror 31, and the length of the line segment LS connecting both ends of the reflective surface 31a is 2 ⁇ H.
• D MAX /H D MAX is the maximum value of the length along the optical axis OA with respect to minute LS (see FIG. 5).
• D MAX /H changes depending on how the cross section is taken
• the maximum value of D MAX /H when the position of the cross section is changed may be taken as the degree of curvature Sa1.
• the degree of curvature Sb and the degree of curvature Sa2 are also defined similarly to the degree of curvature Sa1.
• the aerial image display device 1 has a configuration in which the degree of curvature Sa1 of the first concave mirror 31 is greater than the degree of curvature Sa2 of the second concave mirror 33, and the degree of curvature Sa2 of the second concave mirror 33 is greater than the degree of curvature Sb of the convex mirror 32.
• the first concave mirror 31 that reflects the image light L emitted from the display device 2 toward the convex mirror 32 can be placed close to the display device 2 .
• the space occupied by the display device 2 and the reflective optical system 3 can be reduced, so the aerial image display device 1 can be downsized.
• the aerial image display device 1 can be downsized, the optical path length of the image light L between the display surface 2a of the display device 2 and the reflective surface 33a of the second concave mirror 33 can be shortened, thereby preventing unwanted scattering and interference. The loss of the image light L due to such factors can be suppressed. As a result, the display quality of the aerial image display device 1 can be improved.
• the aerial image display device 1 is configured to display the aerial image R using the reflective optical system 3 including the first concave mirror 31, the convex mirror 32, and the second concave mirror 33, the first concave mirror 31, the convex mirror 32, and the second concave mirror
• the aerial image display device 1 does not include an optical element (for example, a beam splitter, a polarizing filter, etc.) that transmits or separates a part of the image light L incident on the reflective optical system 3, the brightness of the aerial image R is reduced. The decline can be suppressed.
• the brightness of the image 4 displayed on the display surface 2a can be reduced while maintaining sufficient brightness of the aerial image R, so that the power consumption of the aerial image display device 1 can be reduced. This makes it possible to reduce
• the degree of curvature Sb of the convex mirror 32 is relatively small, the spread of the image light L reflected by the convex mirror 32 can be suppressed. As a result, the second concave mirror 33 that reflects the image light L reflected by the convex mirror 32 can be prevented from increasing in size. Further, the convex mirror 32 is the optical member that contributes most to the enlargement of the aerial image R, and therefore is the optical member that most influences the distortion of the aerial image R. Since the degree of curvature Sb of the convex mirror 32 is relatively small, distortion of the aerial image R can be reduced.
• the first concave mirror 31 may include an adjustment member that adjusts the relative spatial arrangement with respect to the display device 2, such as the distance from the display device 2 and the inclination angle.
• the adjustment member is, for example, a support member such as a rod installed on the back side of the first concave mirror 31, a shaft member that is provided on the support member and rotates the support member and the first concave mirror 31, and a shaft member that rotates the support member and the first concave mirror 31.
• a slide mechanism or the like for parallel movement may be provided.
• the adjustment member may be adjusted manually or electrically using a stepping motor or the like.
• Such an adjustment member may also be included in the convex mirror 32 and the second concave mirror 33.
• the aerial image display device 1 may have a configuration in which the size (eg, diameter, etc.) of the second concave mirror 33 is larger than the size (eg, diameter, etc.) of the first concave mirror 31.
• This configuration makes it easy to display the enlarged aerial image R. That is, the image light L spatially propagates the image sequentially enlarged by the first concave mirror 31 and the convex mirror 32, and the image finally enlarged most by the second concave mirror 33 is transferred to the virtual imaging plane of the aerial image R. 8 becomes easier to reflect.
• the second concave mirror 33 is relatively large, it becomes easy to make the shape of the reflecting surface 33a correspond to each of the plurality of partial lights included in the image light L. As a result, it becomes possible to effectively reduce distortion of the aerial image R.
• the size of the first concave mirror 31 may be defined by the length of the maximum diameter of the reflecting surface 31a of the first concave mirror 31 (also referred to as the length of the maximum diameter when viewed from the front).
• the size of the second concave mirror 33 may be defined by the length of the maximum diameter of the reflecting surface 33a of the second concave mirror 33 (which can also be called the length of the maximum diameter when viewed from the front).
• the shape of the reflecting surface 31a of the first concave mirror 31 in front view is circular.
• the size, so-called dimension, of the first concave mirror 31 may be 2H (shown in FIG.
• the center of the reflective surface 31a is defined by the lowest point (maximum protrusion point) of the curved reflective surface 31a.
• the reflection surface 31a of the first concave mirror 31 has an elliptical shape when viewed from the front.
• the size of the first concave mirror 31 may be the length of the major axis of a line segment passing over the center of the reflective surface 31a and connecting both ends.
• the size of the first concave mirror 31 is determined by the maximum diameter (for example, , diagonal diameter, etc.).
• the size of the second concave mirror 33 and the size of the convex mirror 32 may be similarly defined.
• the maximum diameter length of the first concave mirror 31 may be, for example, about 150 mm to 200 mm.
• the length of the maximum diameter of the second concave mirror 33 may be, for example, about 200 mm to 350 mm.
• the length of the maximum diameter of the convex mirror 32 may be, for example, about 100 mm to 150 mm.
• the size of the first concave mirror 31 may be defined by the area of the reflective surface 31a of the first concave mirror 31 or the area of the reflective surface 31a of the first concave mirror 31 when viewed from the front.
• the size of the second concave mirror 33 may be defined by the area of the reflective surface 33a of the second concave mirror 33 or the area of the reflective surface 33a of the second concave mirror 33 when viewed from the front.
• the first concave mirror 31 and the second concave mirror 33 may be free-form concave mirrors in which the reflecting surfaces 31a and 33a are free-form surfaces.
• the convex mirror 32 may be a free-form convex mirror in which the reflecting surface 32a has a free-form surface.
• the free-form surfaces defining the reflective surfaces 31a, 32a, and 33a may be XY polynomial surfaces (also referred to as SPS XYP surfaces) defined by equations (1) and (2) shown below.
• the XY polynomial surface is expanded into polynomials up to the 10th order that are added to the reference conic surface. Therefore, in equations (1) and (2), the sum of m and n is 10 or less.
• z is the sag amount of the plane parallel to the z-axis (optical axis)
• c the vertex curvature
• k are the Conic constants
• Cj are the coefficients of the monomial x m y n .
• the reflective surface of the second concave mirror 33 33a may overlap the display surface 2a of the display device 2, the reflective surface 31a of the first concave mirror 31, and the reflective surface 32a of the convex mirror 32.
• the aerial image display device 1 can be downsized. As a result, the optical path length of the image light L inside the aerial image display device 1 can be shortened, so that loss of the image light L due to undesired scattering, interference, etc. can be suppressed. Consequently, the display quality of the aerial image display device 1 can be improved.
• the reflective surface 33a of the second concave mirror 33 is similar to the display device. 2, a reflective surface 31a of the first concave mirror 31, and a reflective surface 32a of the convex mirror 32.
• the aerial image display device 1 can be further downsized.
• the direction parallel to the virtual image plane 8 of the aerial image R (the Y direction in FIGS. 1A and 1B) is the aerial image. This is the height direction of the display device 1. Further, the direction perpendicular to the virtual image plane 8 of the aerial image R is the thickness direction (depth direction) of the aerial image display device 1.
• the reflective surface 33a overlaps the display surface 2a, the reflective surface 31a, and the reflective surface 32a.
• at least the thickness (depth) of the aerial image display device 1 can be reduced.
• a plurality of visible light emitting parts 21a are arranged in a first region 23a1 of a first surface 23a, and a plurality of visible light emitting parts 21a are arranged in a second region 23a2 of the first surface 23a.
• a configuration may be adopted in which a plurality of infrared light emitting sections 21b are arranged.
• the second region 23a2 is a region that does not overlap with the first region 23a1 in plan view.
• the plurality of visible light emitting parts 21a and the plurality of infrared light emitting parts 21b are arranged in different areas, it is possible to prevent the white light emitted from the visible light emitting part 21a from passing through the infrared light emitting subpixel. It can be suppressed. Further, it is possible to suppress the infrared light emitted from the infrared light emitting section 21b from passing through the red light emitting subpixel, the green light emitting subpixel, and the blue light emitting subpixel. Thereby, the image quality of the visible light image and the infrared light image displayed on the display surface 2a can be improved.
• the plurality of visible light emitting sections 21a and the plurality of infrared light emitting sections 21b are arranged in different areas, by appropriately designing the reflective optical system 3, they can be arranged at any position on the virtual image plane 8. It is possible to form a visible light aerial image R1 and an infrared light aerial image R2.
• the aerial image display device 1 can also be used as a heater during cold seasons such as winter. can.
• a part of the image 4 may be made into a visible light image, and another part of the image 4 may be made into a temperature sensitive part. In this case, a visual sense of warmth may be provided to the user by making the visible light image a bright and bright image of the sun or the like.
• the self-luminous display device 2 has a plurality of visible light emitting sections 24a arranged in a first region 23a1 of a first surface 23a, and a plurality of visible light emitting sections 24a arranged in a second region 23a2 of the first surface 23a.
• the configuration may be such that the external light emitting parts 24b are arranged.
• the second region 23a2 is a region that does not overlap with the first region 23a1 in plan view.
• Arrays can be optimized. Thereby, the image quality of the visible light image and the infrared light image displayed on the display surface 2a can be improved. Even if the plurality of visible light emitting sections 24a and the plurality of infrared light emitting sections 24b are arranged in different areas, by appropriately designing the reflective optical system 3, they can be arranged at any position on the virtual image plane 8. It is possible to form a visible light aerial image R1 and an infrared light aerial image R2.
• the plurality of visible light emitting parts 24a and the plurality of infrared light emitting parts 24b are arranged in different areas, only visible light images can be displayed when only the plurality of visible light emitting parts 24a are made to emit light. .
• the infrared light image (warm sensing part) can be displayed, and the aerial image display device 1 can also be used as a heater during cold seasons such as winter. can.
• a part of the image 4 may be made into a visible light image, and another part of the image 4 may be made into a temperature sensitive part.
• a visual sense of warmth may be provided to the user by making the visible light image a bright and bright image of the sun or the like.
• FIG. 8 is a diagram showing the configuration of an aerial image display device according to another embodiment of the present disclosure.
• the aerial image display device 1A of this embodiment differs from the aerial image display device 1 in the configuration of the reflective optical system, and has the same configuration in other respects.
• the same reference numerals as device 1 will be given, and detailed explanation will be omitted.
• the aerial image display device 1A of this embodiment includes a display device 2 and a reflective optical system 3A.
• the reflective optical system 3A is composed of a first concave mirror 31 and a second concave mirror 33, as shown in FIG.
• the first concave mirror 31 is located on the optical path of the image light L emitted from the display device 2.
• the first concave mirror 31 reflects the image light L emitted from the display device 2 in a direction different from the direction toward the display device 2 .
• the second concave mirror 33 is located on the optical path of the image light L reflected by the first concave mirror 31.
• the second concave mirror 33 reflects the image light L reflected by the first concave mirror 31 in a direction different from the direction toward the first concave mirror 31 .
• the first concave mirror 31 has a reflective surface 31a with a degree of curvature Sa1.
• the second concave mirror 33 has a reflective surface 33a with a degree of curvature of Sa2.
• the degree of curvature Sa1 of the first concave mirror 31 may be greater than the degree of curvature Sa2 of the second concave mirror 33.
• the aerial image display device 1A can be miniaturized, the optical path length of the image light L between the display surface 2a of the display device 2 and the reflective surface 33a of the second concave mirror 33 can be shortened, thereby preventing unwanted scattering and interference. The loss of the image light L due to such factors can be suppressed. As a result, the display quality of the aerial image display device 1A can be improved.
• the first concave mirror 31 and the second concave mirror 33 may be free-form concave mirrors in which the reflecting surfaces 31a and 33a are free-form surfaces.
• the shapes of the reflecting surfaces 31a and 33a of the first concave mirror 31 and the second concave mirror 33 are free-form surfaces, it is easy to make the reflecting surfaces 31a and 33a into a shape that effectively reduces distortion of the aerial image R. become. As a result, it becomes possible to effectively reduce distortion of the aerial image R.
• the aerial image display device 1A can provide a new video experience to the user 5 using infrared light.
• the aerial image display device 1A may display only an infrared image without displaying a visible light image on the display surface 2a. In other words, the aerial image display device 1A may be used as a heater similarly to the aerial image display device 1.
• FIG. 9 is a diagram showing the configuration of an aerial image display device 1B according to another embodiment of the present disclosure.
• the aerial image display device 1B of this embodiment is different from the aerial image display device 1 in that it includes a stimulation signal irradiation unit 66 that irradiates the user's body with a stimulation signal 66a. Further, the aerial image display device 1B does not include the time lag control section 7. In other respects, the aerial image display device 1B has the same configuration as the aerial image display device 1, so similar configurations are given the same reference numerals as those of the aerial image display device 1, and detailed description thereof will be omitted.
• the aerial image display device 1B displays a part of the finger 5f of the user 5 when a part of the user's 5 body (for example, a part of the finger 5f of the hand 5h) comes into contact with the high temperature image part 43 in the aerial image R.
• This configuration includes a stimulation signal irradiation section 66 that irradiates a stimulation signal 66a to a part of the finger 5f of the user 5 that is deviated from the part.
• This configuration provides the following effects. For example, as shown in FIG.
• the parts of the user's 5 body to which the stimulation signal 66a is irradiated include a part of the finger 5f of the user's hand 5h, a part of the back of the user's hand 5h, and a part of the back of the user's 5 hand 5h. It may also be a part of the arm of the user 5, or the like.
• the stimulation signal 66a may be a tactile sensation induction signal that induces a tactile sensation in the user 5.
• the tactile sensation-inducing signal may be a sonic signal, an ultrasonic signal, etc. that is air vibration, or may be a wind (air flow) that is air pressure.
• the ultrasonic signal has the advantage that it is less likely to interfere with the aerial image R because the user 5 cannot hear the ultrasonic signal.
• the frequency of the ultrasonic signal may be about 20 kHz or more, and may be about 20 kHz to 20 MHz.
• the stimulation signal irradiation unit 66 may be an ultrasonic signal generator.
• an ultrasonic signal generator is equipped with an electric-ultrasonic transducer array (also referred to as an ultrasonic transducer array), and uses phase control to aggregate multiple ultrasonic signals emitted from the ultrasonic transducer array. It may also be an aerial haptic presentation device (aerial haptics) that generates a tactile sensation.
• an electric-ultrasonic transducer array also referred to as an ultrasonic transducer array
• an aerial haptic presentation device an aerial haptic presentation device that generates a tactile sensation.
• the stimulation signal 66a may be a thermal sensation inducing signal that induces a thermal sensation.
• the thermal sensation-inducing signal may be a near-infrared signal, an infrared signal, or the like, which is a heat ray, or may be a hot air (hot air flow).
• the thermal sensation inducing signal is a near-infrared signal or an infrared signal, there is an advantage that the thermal sensation inducing signal can be pinpointed to a part of the user's 5 body with high positional accuracy.
• the warm sensation inducing signal may give a warm sensation (temperature) higher than the warm sensation (temperature) of the high temperature image section 43 to a part of the user's 5 body.
• the thermal sensation inducing signal may give a high thermal sensation (temperature) to a part of the user 5's body that is more than one time and about twice as high as the thermal sensation (temperature) of the high temperature image section 43; Not limited to range.
• the stimulation signal irradiation unit 66 irradiates the stimulation signal 66a to a part f2 of the finger 5f of the user 5 that is shifted from the part f1 of the finger 5f of the user 5, but the amount of deviation (distance) between the part f1 and the part f2 is The deviation) may be about 10 mm to about 80 mm. That is, the distance difference at which the mutual temperature reference effect occurs may be about 10 mm to about 80 mm. If it is less than 10 mm, it tends to be difficult to impart depth to the thermal sensation. If it exceeds 80 mm, mutual temperature reference tends to be difficult to occur.
• the aerial image display device 1B may include a detection unit 65 that detects that a part of the body of the user 5 (finger 5f, etc.) comes into contact with the high temperature image portion 43 in the aerial image R.
• the detection unit 65 may be, for example, an imaging device such as a camera.
• the detection unit 65 may be a light (electromagnetic wave) detection device that detects reflection, passage, or non-passage of visible light, laser light, infrared light, electromagnetic waves, and the like.
• the light (electromagnetic wave) detection device has a light emitting part for visible light, etc., and a light receiving part for visible light, etc., and when the light receiving part receives the reflected light reflected by the finger 5f etc.
• the output of the light receiving part is It may be configured to detect that the finger 5f or the like touches the high-temperature image portion 43 in the aerial image R when
• the photodetecting device has a light emitting part for visible light, etc., and a light receiving part for visible light, etc., and when the light reception at the light receiving part is blocked by a finger 5f etc. (when the output of the light receiving part disappears) ), it may be configured to detect that the finger 5f or the like comes into contact with the high temperature image portion 43 in the aerial image R.
• the detection unit 65 may be a sound wave detection device that detects reflection, passage, or non-passage of a sound wave or an ultrasonic wave. Its operating principle may be similar to that of the photodetector.
• FIG. 11 is a diagram showing the configuration of an aerial image display device 1C according to another embodiment of the present disclosure.
• the aerial image display device 1C of this embodiment differs from the aerial image display device 1A in that it includes a stimulation signal irradiation unit 66 that irradiates a stimulation signal 66a onto the user's body. Further, the aerial image display device 1C does not include the time lag control section 7. In other respects, the aerial image display device 1C has the same configuration as the aerial image display device 1A, so similar configurations are given the same reference numerals as those of the aerial image display device 1A, and detailed description thereof will be omitted.
• the aerial image display device 1C includes a reflective optical system 3A.
• the reflective optical system 3A includes a first concave mirror 31 and a second concave mirror 33, and does not have a convex mirror 32.
• the aerial image display device 1C becomes smaller, and the temperature stimulus is extended in the depth direction to give depth to the thermal sensation.By combining this with a deep image, the user 5 can feel a more realistic feeling (reality). ) can provide a new video experience.
• the aerial image display devices 1, 1A, 1B, and 1C may be heads-up displays installed in a vehicle.
• a part of the front windshield of the vehicle may be used as a reflective member, and the reflective member may be used in place of the second concave mirror 33.
• the configuration may be such that the user visually recognizes the aerial image R through the reflective member.
• the reflective member may be of a transflective type (one that transmits about half the light and reflects about half the light).
• the aerial image display devices 1, 1A, 1B, and 1C have the following characteristics when viewed from the side in the vertical cross section shown in FIGS. 1A, 1B, 9, and 11.
• the display device 2 (and convex mirror 32) may be located between the first concave mirror 31 and the second concave mirror 33.
• the first concave mirror 31 may be at the bottom position and the second concave mirror 33 may be at the top position.
• the height of the aerial image display devices 1, 1A, 1B, and 1C can be reduced, making it easy to downsize them.
• the size of the infrared light emitting section 21b may be smaller than the size of the visible light emitting section 21a. The reason is that the transmittance of infrared light to the liquid crystal panel 22 is higher than the transmittance of visible light to the liquid crystal panel 22. By using the small infrared light emitting section 21b with low emission intensity, the power consumption of the infrared light emitting section 21b can be reduced.
• the display device and aerial image display device of the present disclosure it is possible to provide users with a new video experience using infrared light.
• the present disclosure can be implemented in the following configurations (1) to (19).
• a display section having a display surface having a display surface; a reflective optical system that reflects image light of the image displayed on the display surface and forms a real aerial image;
• An aerial image display device that displays the high-temperature image portion on the display surface using light including infrared light when the image includes a high-temperature image portion that reflects a high-temperature object having a temperature higher than a predetermined temperature.
• the aerial image display device which is capable of displaying the high temperature image portion as a moving image.
• the display section has a plurality of visible light emitting sections and a plurality of infrared light emitting sections, Configurations (2) to 12, wherein the light emission control unit enables moving image display of the high-temperature image area by controlling light emission and non-light emission of the plurality of visible light emission units and the plurality of infrared light emission units.
• the aerial image display device according to any one of (4).
• the high-temperature image section is composed of a visible light image displayed using visible light and an infrared light image displayed using infrared light,
• the aerial image display device according to any one of configurations (2) to (6), wherein the infrared light image has a size that includes the visible light image on the display surface.
• the infrared light image has a temperature gradient part around the visible light image on the display surface, in which the intensity of the infrared light decreases as the distance from the center of the visible light image increases (7)
• the aerial image display device described in described in .
• (9) further including a time lag control section;
• the time lag control section temporally delays the movement of the infrared light image with respect to the movement of the visible light image.
• Image display device When displaying the high-temperature image part as a moving image, the time lag control section temporally delays the movement of the infrared light image with respect to the movement of the visible light image.
• a stimulation signal is irradiated to a part of the user's body that is shifted from the part of the user's body.
• the aerial image display device according to any one of configurations (2) to (9), comprising a stimulation signal irradiation section.
• the reflective optical system includes: a first concave mirror that reflects the image light in a direction different from the direction toward the display section; a convex mirror that reflects the image light reflected by the first concave mirror in a direction different from the direction toward the first concave mirror; A second concave mirror that reflects the image light reflected by the convex mirror in a direction different from the direction toward the convex mirror and forms a real aerial image.
• the aerial image display device according to any one of the above.
• the first concave mirror and the second concave mirror are free-form concave mirrors,
• the reflective optical system includes a first concave mirror that reflects the image light in a direction different from the direction toward the display device; a second concave mirror that reflects the image light reflected by the first concave mirror in a direction different from the direction toward the first concave mirror and forms a real aerial image;
• the aerial image display device according to any one of (13).
• the aerial image display device of the present disclosure makes it possible to operate an aerial image in a touchless manner, and as a result, it can be used in various product fields such as, but not limited to, the following.
• communication devices that perform conversations and communications using aerial images
• medical interview devices that allow doctors to interview patients through aerial images
• navigation devices and driving control devices for vehicles such as cars, and orders for stores, etc.
• Ordering/receiving devices/register devices, operation panels for buildings/elevators, etc. learning devices for teaching or receiving classes with aerial images, office equipment for communicating and giving instructions, etc. with aerial images
• aerial images Amusement machines for playing games, projection devices that project images onto the ground, building walls, etc. at amusement parks, game centers, etc., simulator devices for conducting mock experiments using aerial images at universities, medical institutions, etc., and the market. ⁇ These include large displays that display prices at stock exchanges, etc., and video viewing devices that display aerial images.
• Aerial image display device Display unit (display device) 2a Display surface 21 Backlight 21a Visible light emitting section 21b Infrared light emitting section 22 Liquid crystal panel 23 Substrate 23a First surface 23a1 First region 23a2 Second region 24 Pixel 24a Visible light emitting section 24aR Red light emitting element 24aG Green light emitting element 24aB Blue light emitting element 24b Infrared light emitting section 24bI Infrared light emitting element 3,3A Reflective optical system 31 First concave mirror 31a Reflecting surface 32 Convex mirror 32a Reflecting surface 33 Second concave mirror 33a Reflecting surface 4 Image 43 High temperature image section 43a Visible light image 43b Infrared light image 43ba Temperature gradient section 44 Room temperature image section 5 User 6 Light emission control section 7 Time lag control section 8 Virtual imaging plane 50 Storage section 60 Temperature sensor 65 Detection section 66 Stimulation signal irradiation section 66a Stimulation signal

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• 2023
  • 2023-05-22 WO PCT/JP2023/019033 patent/WO2023228919A1/ja not_active Ceased
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