WO2017110942A1 - 車両用ヘッドアップディスプレイシステム - Google Patents
車両用ヘッドアップディスプレイシステム Download PDFInfo
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- WO2017110942A1 WO2017110942A1 PCT/JP2016/088236 JP2016088236W WO2017110942A1 WO 2017110942 A1 WO2017110942 A1 WO 2017110942A1 JP 2016088236 W JP2016088236 W JP 2016088236W WO 2017110942 A1 WO2017110942 A1 WO 2017110942A1
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- chromaticity
- display
- display surface
- luminance
- acquisition unit
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- 239000002131 composite material Substances 0.000 claims description 10
- 238000003384 imaging method Methods 0.000 claims description 10
- 238000005286 illumination Methods 0.000 description 18
- 230000003287 optical effect Effects 0.000 description 18
- 238000012937 correction Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 210000003128 head Anatomy 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- 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
- B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- 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
- B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
- B60K35/80—Arrangements for controlling instruments
- B60K35/81—Arrangements for controlling instruments for controlling displays
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2520/00—Input parameters relating to overall vehicle dynamics
- B60W2520/10—Longitudinal speed
-
- 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
- G02B2027/0118—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility
-
- 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
- G02B2027/014—Head-up displays characterised by optical features comprising information/image processing systems
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2340/00—Aspects of display data processing
- G09G2340/12—Overlay of images, i.e. displayed pixel being the result of switching between the corresponding input pixels
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2380/00—Specific applications
- G09G2380/10—Automotive applications
Definitions
- This disclosure relates to a vehicle head-up display system.
- a vehicle head-up display (HUD) device reflects light transmitted through a display panel of a projection unit to a transflective plate such as a windshield of the vehicle.
- the reflected light causes the vehicle operator to recognize a virtual image on the display surface of the display panel.
- Japanese Laid-Open Patent Publication No. 2001-174774 describes a vehicle HUD device.
- the spectral method is switched between high color display and high luminance display.
- three primary color filters are inserted in the optical path for high color display. The filter is removed from the optical path for high brightness display.
- a vehicle head-up display system includes a display panel, a transflective plate, a chromaticity acquisition unit, and a controller.
- the display panel has a display surface for displaying an image.
- the semi-transmissive plate reflects display light from the display surface and guides it to a predetermined space.
- the chromaticity acquisition unit acquires chromaticity of a background that overlaps a virtual image of the display surface visually recognized by an operator located in the predetermined space.
- the controller calculates a chromaticity of a combined display surface obtained by combining the display surface and the background.
- the controller controls the chromaticity of the display surface so that a chromaticity difference between the chromaticity of the background and the chromaticity of the composite display surface is a predetermined value or more.
- FIG. 5 is a diagram illustrating an example of color difference correction presence / absence determination in the process of FIG. 4. It is a figure which shows an example of the chromaticity change of the display surface in the process of FIG.
- a vehicle head-up display device (HUD device) 1 includes a display 10, a controller 20, a projection optical system 30, a chromaticity acquisition unit 40, a luminance acquisition unit 50, and an in-vehicle illuminance acquisition unit. 60 and a vehicle speed acquisition unit 70.
- the display 10 and the projection optical system 30 are stored in the housing 5.
- the HUD device 1 includes a configuration that is not stored in the housing 5, it can be referred to as a vehicle head-up display system (HUD system).
- the housing 5 is accommodated in a dashboard of the vehicle V or the like.
- the HUD device 1 emits display light X from the display surface of the display 10 to the outside through the projection optical system 30.
- the display light X is reflected by a semi-transmissive plate Y such as a windshield of the vehicle V.
- the reflected display light X is guided to a predetermined space where it is assumed that the eyes of the operator M such as the driver of the vehicle V are located.
- the operator M visually recognizes the virtual image Z on the display surface at a predetermined position in front of the semi-transmissive plate Y.
- the virtual image Z is a surface on which the operator M has an illusion that the vehicle V is in front of the vehicle V. For the operator M, the scenery in front of the vehicle V and the virtual image Z appear to overlap.
- Display 10 emits display light X corresponding to an image that operator M wants to view.
- the display 10 includes a light source device and a transmissive display panel, or a self-luminous display panel.
- the intensity of each wavelength of the illumination light is attenuated according to the displayed image.
- the illumination light becomes display light X corresponding to the displayed image by passing through the liquid crystal panel.
- a self-luminous display panel emits display light corresponding to an image to be displayed. Details of the display 10 will be described later.
- Controller 20 controls display light X emitted from display 10.
- the controller 20 includes, for example, a microcomputer.
- the microcomputer may include a nonvolatile storage area and a processor that executes a control program stored in the storage area.
- the controller 20 can control an image to be displayed on the display surface of the display panel of the display 10.
- the controller 20 controls the display light X by controlling at least one of the amount of illumination light from the light source device of the display 10 and the image displayed on the display surface of the display panel.
- the controller 20 controls the amount of illumination light from the light source device by controlling the lighting time and the amount of power to be supplied.
- the controller 20 changes the luminance of the display light X by controlling the amount of light from the light source device.
- the controller 20 controls the chromaticity and luminance of the display light X by controlling an image displayed on the display surface of the display panel.
- the chromaticity and luminance of the virtual image Z change corresponding to the chromaticity and luminance of the display light X. It can be said that the controller 20 can control the chromaticity and luminance of the virtual image Z.
- the controller 20 is housed in the housing 5 in FIG. 1, the controller 20 can be located outside the housing 5.
- the controller 20 may include a control unit for the vehicle V.
- the projection optical system 30 reflects the display light X from the display 10 and guides the display light X to the semi-transmissive plate Y.
- the projection optical system 30 can expand the range in which the display light X is projected.
- the projection optical system 30 has a mirror made of, for example, a concave mirror. Although FIG. 1 illustrates the case where the projection optical system 30 has two mirrors, the number of mirrors is not limited to two.
- the semi-transmissive plate Y reflects a part of the incident light.
- the semi-transmissive plate Y can transmit part of the incident light.
- the semi-transmissive plate Y can be provided in the vehicle V.
- the semi-transmissive plate Y may be a combiner or the like that reflects the display light X from the projection optical system 30 in addition to the windshield of the vehicle V.
- a transflective plate Y such as a combiner can be included in the HUD device 1.
- the semi-transmissive plate Y reflects a part of the display light X emitted from the projection optical system 30.
- the semi-transmissive plate Y reflects a part of the display light X toward a space where the eyes of the operator M are assumed to exist. A space that is assumed to have the eyes of the operator M may be called an eye box.
- the virtual image Z is visually recognized by the operator M when the operator M receives the display light X reflected by the semi-transmissive plate Y.
- the virtual image Z is visually recognized through the translucent plate Y so as to overlap a background ⁇ such as a scenery outside the vehicle that can be visually recognized by the operator M.
- the virtual image Z is a surface on which the operator M has an illusion that the vehicle V is in front of the vehicle V. For the operator M, the scenery in front of the vehicle V and the virtual image Z appear to overlap.
- the chromaticity acquisition unit 40 acquires the chromaticity of the background ⁇ on which the virtual image Z is superimposed.
- the chromaticity acquisition unit 40 transmits the acquired chromaticity to the controller 20.
- the luminance acquisition unit 50 acquires the luminance of the background ⁇ superimposed on the virtual image Z.
- the luminance acquisition unit 50 can transmit the acquired luminance to the controller 20.
- the chromaticity acquisition unit 40 and the luminance acquisition unit 50 can be integrally configured as one imaging device, for example.
- the chromaticity acquisition unit 40 and the luminance acquisition unit 50 can acquire chromaticity and luminance based on the imaging information of the background ⁇ .
- the chromaticity acquisition unit 40 can be configured, for example, as an input terminal that receives chromaticity input from an imaging apparatus outside the apparatus.
- the luminance acquisition unit 50 can be configured as, for example, an input terminal that receives luminance input from an imaging apparatus outside the apparatus.
- the chromaticity acquisition unit 40 and the luminance acquisition unit 50 can be configured as one input terminal.
- the chromaticity acquisition unit 40 and the luminance acquisition unit 50 can be configured as an input terminal that receives an input of a video signal including the background ⁇ from an imaging device outside the device, for example.
- the chromaticity acquisition unit 40 and the luminance acquisition unit 50 can transmit the input video signal to the controller 20.
- the controller 20 can acquire chromaticity and luminance from the received video signal.
- the in-vehicle illuminance acquisition unit 60 acquires the illuminance in the passenger compartment of the vehicle V.
- the in-vehicle illuminance acquisition unit 60 can transmit the acquired illuminance to the controller 20.
- the in-vehicle illuminance acquisition unit 60 includes, for example, an illuminance sensor.
- the vehicle speed acquisition unit 70 acquires the traveling speed of the vehicle V from a speed sensor or the like provided in the vehicle V.
- the vehicle speed acquisition unit 70 can transmit the acquired traveling speed to the controller 20.
- the vehicle speed acquisition unit 70 can include, for example, an engine control unit (ECU) of the vehicle V.
- the vehicle speed acquisition unit 70 may be configured as an input terminal that receives an input of a video signal including the background ⁇ from a vehicle speed sensor or ECU outside the apparatus, for example.
- the schematic configuration of the display 10 will be described with reference to FIG.
- the display 10 includes a light source device 11, a display panel 12, and an illumination optical system 13.
- the light source device 11 is a member that emits illumination light.
- the light source device 11 may include, for example, one or a plurality of LEDs (Light Emitting Diodes) that diverge and emit white light.
- the illumination light emitted from the light source device 11 passes through the illumination optical system 13 and is irradiated on the display panel 12.
- the light source device 11 When the light source device 11 includes a plurality of LEDs, for example, as shown in FIG. 2, the light source device 11 can be regarded as a point light source on the plane parallel to the display panel 12 and in the vicinity of the intersection with the perpendicular from the center of the display panel 12. Can be located in place.
- the display panel 12 is a transmissive display panel.
- the display panel 12 includes a liquid crystal display panel and a MEMS shutter panel.
- the liquid crystal panel can include, for example, a polarizing filter, a glass substrate, a transparent electrode, an alignment film, a liquid crystal display element, a color filter, and the like.
- the display panel 12 emits transmitted light as display light X when irradiated with illumination light from the illumination optical system 13.
- the display light X becomes light corresponding to an image displayed on the display surface of the display panel 12
- the display light X becomes light corresponding to the color image.
- the display light X changes corresponding to the changed image.
- the image displayed on the display surface of the display panel 12 is controlled by the controller 20.
- the controller 20 can control the display light X by controlling an image displayed on the display surface of the display panel 12.
- the illumination optical system 13 is located between the light source device 11 and the display panel 12.
- the illumination optical system 13 guides illumination light from the light source device 11 to the display panel 12.
- the illumination optical system 13 includes, for example, a lens 131, a diffusion plate 132, and the like.
- the illumination optical system 13 causes the illumination light from the light source device 11 to enter the display panel 12.
- FIG. 1 An example of the virtual image Z by the HUD device 1 will be described with reference to FIG.
- Various types of information such as vehicle speed information and average fuel efficiency information are displayed on the display surface of the display panel 12 with preset chromaticity and luminance.
- the chromaticity and luminance of the information displayed on the display surface are controlled by, for example, the following. If the controller 20 causes the light source device 11 to emit illumination light at what level and the display panel 12 to display information at what level of chromaticity, the chromaticity and Correspondence information that considers whether information is displayed with luminance is stored in advance. The controller 20 controls the light source device 11 and the display panel 12 based on the correspondence information.
- the operator M who is visible to the operator M through the translucent plate Y and overlaps the background ⁇ that the operator M can visually recognize, visually recognizes the virtual image Z that overlaps the background ⁇ . It will be.
- the background ⁇ and the virtual image Z are the same color system, information displayed on the virtual image Z is difficult to distinguish from the background ⁇ . Therefore, in the present embodiment, the visibility of the virtual image Z is improved by the following processing.
- the controller 20 acquires the chromaticity and the luminance based on the imaging information of the background ⁇ superimposed on the virtual image Z from the chromaticity acquisition unit 40 and the luminance acquisition unit 50 (Step S1).
- the chromaticity and luminance of the acquired background ⁇ are represented as (Y 2 , u ′, v ′) in the u′v′Y color system.
- the chromaticity and luminance of the acquired background ⁇ are converted into (Y 2 , x 2 , y 2 ) which is an xyY color system, for example, by the following conversion formula.
- x 2 9u ′ / (6u′ ⁇ 16v ′ + 12)
- y 2 4v ′ / (6u′ ⁇ 16v ′ + 12)
- the controller 20 calculates the chromaticity and luminance of the combined display surface obtained by combining the display surface and the background ⁇ (step S2).
- the chromaticity and luminance of the display surface used for calculating the chromaticity and luminance of the composite display surface can be read by the controller 20 as information expressed as (Y 1 , x 1 , y 1 ) in the xyY color system. Is stored in advance.
- the chromaticity and luminance of the composite display surface are information expressed as (X 3 , Y 3 , Z 3 ) in the XYZ color system and (Y 3 , x 3 , y 3 ) in the xyY color system. .
- Each value relating to the chromaticity and luminance of the composite display surface calculated in step S2 is represented by the sum of the corresponding values for the chromaticity and luminance of the display surface and the chromaticity and luminance of the background ⁇ . For example, it can be expressed as follows.
- X 3 Y 1 ⁇ x 1 / y 1 + Y 2 ⁇ x 2 / y 2
- it can be expressed based on the chromaticity and luminance of the display surface and the chromaticity and luminance of the background ⁇ .
- the controller 20 calculates the color difference from the chromaticity difference between the chromaticity of the background ⁇ and the chromaticity of the combined display surface and the luminance ratio between the luminance of the background ⁇ and the luminance of the combined display surface (step S3). .
- the controller 20 calculates the color difference from the chromaticity difference between the chromaticity of the background ⁇ and the chromaticity of the combined display surface and the luminance ratio between the luminance of the background ⁇ and the luminance of the combined display surface (step S3).
- ⁇ (x, y) ⁇ (x 3 ⁇ x 2 ) 2 + (y 3 ⁇ y 2 ) 2 ⁇ 1/2
- ⁇ Y (Y 1 + Y 2 ) / Y 2
- the straight line defined by is defined as a correction threshold line A.
- the color difference is a value equal to or greater than the color difference defined by the correction threshold line A, that is, when ⁇ Y ⁇ a ⁇ ⁇ (x, y) + b is satisfied, it is determined that the color difference is equal to or greater than a predetermined value.
- step S5 the controller 20 corrects the chromaticity and luminance of the display surface (step S5), and returns to the process of step S2. Specifically, as shown in FIG. 5, for example, when the color difference is less than the color difference defined by the correction threshold line A, that is, when ⁇ Y ⁇ a ⁇ ⁇ (x, y) + b is satisfied (the color difference is corrected). If the value is included in the target area B), it is determined that the color difference is less than a predetermined value.
- the correction of the chromaticity and brightness of the display surface can be performed, for example, by the following procedure.
- the controller 20 increases the set value of the luminance of the display surface.
- the controller 20 re-executes the processing from step S2 to step S4 based on the set value of the brightness after the display surface is raised.
- the controller 20 increases the setting value of the luminance of the display surface up to the luminance upper limit value until the color difference reaches a predetermined value or more. If the color difference does not become equal to or greater than the predetermined value even if the luminance setting value of the display surface is increased to the luminance upper limit value, the controller 20 changes the chromaticity setting value of the display surface.
- the controller 20 re-executes the processing from step S2 to step S4 based on the chromaticity setting value after changing the display surface.
- the controller 20 changes the set value of the chromaticity of the display surface until the color difference becomes a predetermined value or more.
- the setting value of the chromaticity of the display surface can be changed, for example, by setting the chromaticity setting value of the display surface as a complementary color of the chromaticity of the background ⁇ . Specifically, as shown in FIG. 6, on the xy coordinates, a straight line connecting the set value (x 1 , y 1 ) of the display surface and the chromaticity (x 2 , y 2 ) of the background ⁇ .
- the set value of the chromaticity of the display surface may be moved to (x 1 ′, y 1 ′) on the opposite side to the chromaticity (x 2 , y 2 ) of the background ⁇ .
- the controller 20 displays the virtual image Z based on the set values of chromaticity and luminance (step S6), and ends the process.
- the HUD device 1 can control the chromaticity and luminance of the display surface so that the color difference between the display surface and the background ⁇ superimposed on the display surface is a predetermined value or more. Therefore, the HUD device 1 can ensure the visibility of the virtual image Z regardless of the background ⁇ .
- the controller 20 divides the background ⁇ into each region (block) constituting the virtual image Z shown in FIG. 3 via the chromaticity acquisition unit 40 and the luminance acquisition unit 50. It's okay.
- the controller 20 may acquire chromaticity and luminance for each of the divided blocks.
- the controller 20 may calculate the chromaticity and luminance of the composite display surface for each block.
- the controller 20 may control the chromaticity and luminance for each block of the display surface corresponding to the virtual image Z so that the chromaticity difference for each block becomes a predetermined value or more.
- the HUD device 1 can set the color difference from the background ⁇ to a predetermined value or more for each block constituting the display surface. Note that the average value, maximum value, or median value of each value in each block can be used as the representative value for the chromaticity and luminance for each block.
- the controller 20 may be configured to increase the brightness of the display surface as the illuminance in the vehicle interior acquired by the in-vehicle illuminance acquisition unit 60 increases.
- the HUD device 1 can reduce the influence on the visibility of the virtual image Z due to the illuminance in the vehicle interior in addition to the background ⁇ .
- the controller 20 can execute the processing shown in FIG. 4 at a higher frequency as the traveling speed of the vehicle V acquired by the vehicle speed acquisition unit 70 is higher.
- the HUD device 1 can continuously ensure high visibility even if the background ⁇ changes frequently as the traveling speed of the vehicle V increases.
- the controller 20 calculates a color difference from the chromaticity and luminance of the background ⁇ and the chromaticity and luminance of the display surface, and controls so that the color difference becomes a predetermined value or more.
- the controller 20 calculates a difference (chromaticity difference) between the chromaticity of the background ⁇ and the chromaticity of the display surface, and controls the chromaticity of the display surface so that the chromaticity difference becomes a predetermined value or more.
- the luminance acquisition unit 50 is not necessarily required.
- the HUD device 1 can ensure the visibility of the virtual image Z regardless of the background ⁇ . it can.
- chromaticity acquisition unit 40 and the luminance acquisition unit 50 are integrally configured as one imaging device, they may be separate imaging devices, or may be sensors other than the imaging device.
- step S4 in the process shown in FIG. 4 the correction threshold line A used for determining whether the color difference is equal to or larger than a predetermined value is shown as a straight line as shown in FIG. It may be any other threshold line.
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Abstract
Description
x2=9u’/(6u’-16v’+12)
y2=4v’/(6u’-16v’+12)
X3=Y1×x1/y1+Y2×x2/y2
Y3=Y1+Y2
Z3=Y1×(1-x1-y1)/y1+Y2×(1-x2-y2)/y2
従って、x3=X3/(X3+Y3+Z3)、及びy3=Y3/(X3+Y3+Z3)も、上記X3,Y3,Z3の各値を代入することで、表示面の色度及び輝度と、背景αの色度及び輝度とに基づいて表すことができる。
Δ(x,y)={(x3-x2)2+(y3-y2)2}1/2
として表すことができる。また、背景αに対する合成表示面の輝度比ΔYは、
ΔY=(Y1+Y2)/Y2
として表すことができる。
ΔY=a×Δ(x,y)+b (ただし、a<0,b>0)
で定義される直線を補正閾値線Aとする。そして、色差が補正閾値線Aで定義される色差以上の値である場合、すなわちΔY≧a×Δ(x,y)+bを満たす場合、色差が所定値以上であると判定する。
10 ディスプレイ
20 コントローラ
40 色度取得部
50 輝度取得部
60 車内照度取得部
70 車速取得部
A 補正閾値線
B 補正対象領域
M 操作者
V 車両
X 表示光
Y 半透過板
Z 虚像
α 背景
Claims (6)
- 画像を表示する表示面を有する表示パネルと、
前記表示面からの表示光を反射させて、所定の空間に導く半透過板と、
前記所定の空間に位置する操作者が視認する前記表示面の虚像に重なる背景の色度を取得する色度取得部と、
前記表示面と前記背景とを合成した合成表示面の色度を算出し、前記背景の色度と前記合成表示面の色度との色度差が所定値以上となるように前記表示面の色度を制御するコントローラと、
を備える、車両用ヘッドアップディスプレイシステム。 - 前記背景の輝度を取得する輝度取得部をさらに備え、
前記コントローラは、
前記合成表示面の輝度を算出し、
前記背景の輝度と前記合成表示面の輝度との輝度比及び前記色度差に基づく色差が所定値以上となるように前記表示面の色度及び輝度を制御する、
請求項1に記載の車両用ヘッドアップディスプレイシステム。 - 前記色度取得部及び前記輝度取得部は1つの撮像装置から取得される、請求項2に記載の車両用ヘッドアップディスプレイシステム。
- 前記車両の車室内の照度を取得する車内照度取得部をさらに備え、
前記コントローラは、前記照度が高いほど、前記表示面の輝度を上げる、
請求項2又は3に記載の車両用ヘッドアップディスプレイシステム。 - 前記色度取得部は、前記背景を分割し、その分割されたブロック毎の色度を取得し、
前記コントローラは、前記合成表示面の前記色度を前記ブロック毎に算出し、前記ブロック毎の前記色度差が所定値以上となるように前記表示面の前記ブロック毎の色度を制御する、
請求項1から4の何れか一項に記載の車両用ヘッドアップディスプレイシステム。 - 前記車両の走行速度を取得する車速取得部をさらに備え、
前記コントローラは、前記車両の走行速度が高いほど、高頻度で処理を実行する、
請求項1から5の何れか一項に記載の車両用ヘッドアップディスプレイシステム。
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