# US 2018/0024359 A1 · Projection type display device and projection display method

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- Number: US 2018/0024359 A1
- Document ID: US20180024359A1
- Status: Published application
- Kind: A1
- Application number: 15/707,241
- Filed: 2017-09-18
- Published: 2018-01-25
- Earliest claimed: 2015-03-19
- Assignees: FUJIFILM Corporation
- Applicants: FUJIFILM Corporation
- Inventors: Kazuya YONEYAMA
- Web page: https://patentgrep.com/patent/US20180024359A1

## CPC

- G02B 27/0101: {characterised by optical features (G02B27/0172 takes precedence)}
- B60K 35/10: Input arrangements, i.e. from user to vehicle, associated with vehicle functions or specially adapted therefor
- B60K 35/234: controlling the brightness, colour or contrast of virtual images depending on the driving conditions or on the condition of the vehicle or the driver
- B60K 35/28: characterised by the type of the output information, e.g. video entertainment or vehicle dynamics information; characterised by the purpose of the output information, e.g. for attracting the attention of the driver
- B60K 35/415: {Glare prevention}
- B60K 35/60: Instruments characterised by their location or relative disposition in or on vehicles (arrangements of lighting devices on dashboards B60Q3/10)
- B60K 35/81: for controlling displays
- B60Q 3/68: using ultraviolet light
- B60Q 3/72: for preventing the driver from being dazzled
- G02B 27/01: Head-up displays
- G02B 27/104: {for use with scanning systems (scanning systems G02B26/10)}
- G02B 27/1066: {for enhancing image performance, like resolution, pixel numbers, dual magnifications or dynamic range, by tiling, slicing or overlapping fields of view}
- G03B 21/10: Projectors with built-in or built-on screen
- G03B 21/60: characterised by the nature of the surface
- G09G 3/02: by tracing or scanning a light beam on a screen
- G09G 5/377: for mixing or overlaying two or more graphic patterns (G09G5/02, G09G5/397 take precedence)
- H04N 9/3164: {using multiple light sources}
- H04N 9/3185: {Geometric adjustment, e.g. keystone or convergence (optical or mechanical adjustment of convergence H04N9/317; using scanning means H04N3/22; optical or mechanical adjustments of projectors not peculiar to the presence of an electronic spatial light modulator G03B21/14)}
- H04N 9/3194: {including sensor feedback}
- B60K 2360/33: Illumination features
- B60K 2360/334: Projection means
- G02B 27/141: {using dichroic mirrors}
- G02B 27/149: {using crossed beamsplitting surfaces, e.g. cross-dichroic cubes or X-cubes}
- G02B 2027/0118: {comprising devices for improving the contrast of the display / brillance control visibility}
- G02B 2027/014: {comprising information/image processing systems}
- G02B 2027/0141: {characterised by the informative content of the display}
- G09G 3/3413: {Details of control of colour illumination sources}
- G09G 2320/0626: for control of overall brightness
- G09G 2360/16: Calculation or use of calculated indices related to luminance levels in display data
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60Q: ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D)
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

A projection type display device includes: a first light source that emits visible light; a projection receiving member which is disposed on a windshield of a vehicle, to which an image based on the visible light is projected; a second light source that emits ultraviolet light which decreases a light transmittance of the projection receiving member by irradiation of the projection receiving member; a projection unit that projects the visible light emitted from the first light source and the ultraviolet light emitted from the second light source to the projection receiving member; an imaging unit that performs imaging of a scene at front of the windshield of the vehicle; and a detection unit that detects an object image having brightness greater than or equal to a first threshold as defined herein, and the projection unit projects the ultraviolet light as defined herein.

## Claims

### Claim 1

A projection type display device comprising:
a first light source that emits visible light;
a projection receiving member which is disposed on a windshield of a vehicle, to which an image based on the visible light is projected;
a second light source that emits ultraviolet light which decreases a light transmittance of the projection receiving member by irradiation of the projection receiving member;
a projection unit that projects the visible light emitted from the first light source and the ultraviolet light emitted from the second light source to the projection receiving member;
an imaging unit that performs imaging of a scene at front of the windshield of the vehicle; and
a detection unit that detects an object image having brightness greater than or equal to a first threshold from a part, of captured image data of the scene acquired by imaging by the imaging unit, corresponding to a range where the projection receiving member is disposed,
wherein the projection unit projects the ultraviolet light to at least a part of a region of the projection receiving member that corresponds to the object image detected by the detection unit.

### Claim 2 (depends on 1)

The projection type display device according to claim 1,
wherein the projection unit controls a range of projection of the ultraviolet light in accordance with an area of the object image detected by the detection unit.

### Claim 3 (depends on 2)

The projection type display device according to claim 2,
wherein the projection unit, in a state of the area of the object image detected by the detection unit being less than a second threshold, increases the range of projection of the ultraviolet light as the area is increased, and in a state of the area being greater than or equal to the second threshold, fixes the range to a size in a state of the area of the object image reaching the second threshold.

### Claim 4 (depends on 1)

The projection type display device according to claim 1,
wherein the light transmittance of the projection receiving member is decreased as an intensity of the ultraviolet light of irradiation is higher, and
the projection unit controls the intensity of the ultraviolet light in accordance with an area of the object image detected by the detection unit.

### Claim 5 (depends on 4)

The projection type display device according to claim 4,
wherein the projection unit, in a state of the area of the object image detected by the detection unit being less than a second threshold, sets the intensity of the ultraviolet light to a predetermined value and, in a state of the area being greater than or equal to the second threshold, sets the intensity of the ultraviolet light below the predetermined value.

### Claim 6 (depends on 1)

The projection type display device according to claim 1,
wherein the projection unit controls an intensity of the ultraviolet light in accordance with the brightness of the object image detected by the detection unit.

### Claim 7 (depends on 1)

The projection type display device according to claim 1,
wherein in a case of overlap between a projection range of visible light projecting the image and a projection range of the ultraviolet light, the projection unit changes brightness or color of a part, of the visible light projecting the image, that overlaps with the projection range of the ultraviolet light.

### Claim 8 (depends on 1)

The projection type display device according to claim 1,
wherein in a case of overlap between a projection range of the visible light projecting the image and a projection range of the ultraviolet light, the projection unit moves the projection range of the visible light to a part, of the projection receiving member, other than the projection range of the ultraviolet light.

### Claim 9 (depends on 1)

The projection type display device according to claim 1,
wherein in a case of overlap between a projection range of the visible light projecting the image and a projection range of the ultraviolet light, the projection unit stops projection of the visible light to the projection receiving member and outputs the image to a display unit mounted in the vehicle to display the image on the display unit.

### Claim 10

A projection display method comprising:
a projection step of projecting visible light emitted from a first light source to a projection receiving member which is disposed on a windshield of a vehicle thereby projecting an image based on the visible light to the projection receiving member;
a detection step of performing imaging of a scene at front of the windshield of the vehicle by an imaging unit, and detecting an object image having a brightness greater than or equal to a first threshold from a part, of captured image data of the scene, corresponding to a range where the projection receiving member is disposed; and
an anti-glare step of decreasing a light transmittance of the projection receiving member by projecting ultraviolet light emitted from a second light source to at least a part of a region of the projection receiving member corresponding to the object image detected by the detection step.

### Claim 11 (depends on 10)

The projection display method according to claim 10,
wherein in the anti-glare step, a range of projection of the ultraviolet light is controlled in accordance with an area of the object image detected in the detection step.

### Claim 12 (depends on 11)

The projection display method according to claim 11,
wherein in the anti-glare step, in a state of the area of the object image detected in the detection step being less than a second threshold, the range of projection of the ultraviolet light is increased as the area is increased, and in a state of the area being greater than or equal to the second threshold, the range is fixed to a size in a state of the area of the object image reaching the second threshold.

### Claim 13 (depends on 10)

The projection display method according to claim 10,
wherein the light transmittance of the projection receiving member is decreased as an intensity of the ultraviolet light of irradiation is higher, and
in the anti-glare step, the intensity of the ultraviolet light is controlled in accordance with an area of the object image detected in the detection step.

### Claim 14 (depends on 13)

The projection display method according to claim 13,
wherein in the anti-glare step, in a state of the area of the object image detected in the detection step being less than a second threshold, the intensity of the ultraviolet light is set to a predetermined value, and in a state of the area being greater than or equal to the second threshold, the intensity of the ultraviolet light is set below the predetermined value.

### Claim 15 (depends on 10)

The projection display method according to claim 10,
wherein in the anti-glare step, an intensity of the ultraviolet light is controlled in accordance with the brightness of the object image detected in the detection step.

### Claim 16 (depends on 10)

The projection display method according to claim 10,
wherein in a case of overlap between a projection range of the visible light projecting the image and a projection range of the ultraviolet light, in the projection step, brightness or color of a part, of the visible light projecting the image, that overlaps with the projection range of the ultraviolet light is changed.

### Claim 17 (depends on 10)

The projection display method according to claim 10,
wherein in a case of overlap between a projection range of the visible light projecting the image and a projection range of the ultraviolet light, in the projection step, the projection range of the visible light is moved to a part, of the projection receiving member, other than the projection range of the ultraviolet light.

### Claim 18 (depends on 10)

The projection display method according to claim 10,
wherein in a case of overlap between a projection range of the visible light projecting the image and a projection range of the ultraviolet light, in the projection step, projection of the visible light to the projection receiving member is stopped, and the image is output to a display unit mounted in the vehicle and displayed on the display unit.