WO2019163655A1 - Headup display - Google Patents
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- WO2019163655A1 WO2019163655A1 PCT/JP2019/005484 JP2019005484W WO2019163655A1 WO 2019163655 A1 WO2019163655 A1 WO 2019163655A1 JP 2019005484 W JP2019005484 W JP 2019005484W WO 2019163655 A1 WO2019163655 A1 WO 2019163655A1
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- WIPO (PCT)
- Prior art keywords
- display
- light
- head
- unit
- light source
- Prior art date
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- 238000001514 detection method Methods 0.000 claims abstract description 21
- 239000004973 liquid crystal related substance Substances 0.000 description 22
- 230000005540 biological transmission Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 5
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- 229920003002 synthetic resin Polymers 0.000 description 4
- 239000000057 synthetic resin Substances 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 3
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- 239000011521 glass Substances 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229930182556 Polyacetal Natural products 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
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- 238000004512 die casting Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Images
Classifications
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- 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
-
- 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
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
Definitions
- the present disclosure relates to a head-up display, and is particularly suitable for a vehicle head-up display that can change the projection direction.
- the position of the reflecting means that reflects the display light to the projection member is moved to a position where sunlight does not enter the display in the housing through the reflecting means in a stop state where the device is not used.
- the operating state it is configured to return from the position of the stopped state, and in the situation where the head-up display is not used, the sun light is incident on the display in the housing through the reflecting means to reduce the possibility of deterioration.
- Patent Document 1 it is disclosed in Patent Document 1.
- JP 2005-208436 A Japanese Patent Laid-Open No. 2015-59968
- an object of the present disclosure is to provide a head-up display provided with detection means that consumes less power and focuses on the above-described problems.
- the head-up display of the present invention includes a display that generates a display image, a reflection unit that reflects the display image from the display, a drive unit that changes the reflection direction of the reflection unit, and a light source.
- a detecting unit that detects a reference position of the reflecting portion that is fluctuated by the driving unit according to a light receiving state of light emitted from the light source; and a control unit that controls the operation of the driving unit and the detecting unit. It is characterized by.
- the head-up display according to the present disclosure provides a head-up display including a detection unit with low power consumption.
- FIG. 1 is a schematic diagram of a vehicle equipped with a head-up display according to an embodiment of the present disclosure. Sectional drawing of the head-up display by the embodiment.
- FIG. 3A is a diagram illustrating a state where the detected portion is detected by the photosensor
- FIG. 3B is a diagram illustrating a state where the detected portion is not detected by the photosensor.
- the block diagram which shows the structure in connection with the action
- the circuit diagram which shows the connection structure of the photosensor by the embodiment.
- the head-up display is configured such that the display light L projected by the display device 12 that is a display unit disposed inside the instrument panel 11 of the vehicle 10 is the windshield 13 of the vehicle 10 that is a projection member.
- the virtual image V is displayed by reflecting in the direction of the driver (observer) 14.
- the head-up display emits display light L emitted from a liquid crystal display (to be described later) of the display device 12 to the windshield 13 (the projection member), and displays a display image (virtual image) V obtained by the emission.
- the driver 14 visually recognizes the driver. As a result, the driver 14 can observe the virtual image V superimposed on the landscape.
- the display device 12 mainly includes a liquid crystal display 20, a first reflector 30, a second reflector 40, and a housing (housing) 50.
- the liquid crystal display 20 has a light source 21 formed of a light emitting diode mounted on the wiring board R and a front side (directly above) the light source 21 so as to transmit the illumination light from the light source 21 and form the display light L. It is mainly composed of a TFT-type liquid crystal display element (display element) 22 positioned. This is because the light source 21 is disposed behind (directly below) the liquid crystal display element 22, and the display image generated by the liquid crystal display element 22 is generated by predetermined information (information to be displayed later) by light emitted from the light source 21. Is output as display light L for displaying.
- the liquid crystal display 20 is provided in the housing 50 so that the surface on the emission side of the display light L faces a cold mirror (to be described later) of the first reflector 30, and the optical axis of the display light L is on the cold mirror. Fixed and held at a crossing position and orientation.
- the liquid crystal display element 22 emits and displays information (for example, the speed of the vehicle and the engine speed) to be displayed by an element driving circuit (not shown) by numerical values.
- the liquid crystal display 20 outputs display light L composed of light in the visible wavelength range.
- a light source 21 that emits red light mainly emission wavelength range of 610 to 640 nm
- the information to be displayed is not limited to the speed of the vehicle and the engine speed, and any display form can be adopted.
- the first reflector 30 includes a cold mirror 31 and an attachment member 32 for attaching and fixing the cold mirror 31 using predetermined attachment means.
- the cold mirror 31 includes a substantially rectangular glass substrate 31a and a first reflecting layer 31b formed on one surface of the glass substrate 31a (a surface facing a concave mirror described later of the second reflector 40).
- the first reflective layer 31b is composed of multilayer interference films having different film thicknesses, and is formed by a method such as vapor deposition.
- the cold mirror 31 is disposed in an inclined state at a position where the display light L emitted from the liquid crystal display 20 is reflected to the second reflector 40 (the concave mirror) side.
- the cold mirror 31 and the liquid crystal display 20 are arranged at a position where they cannot directly face a translucent cover (to be described later) of the housing 50, and light from outside such as sunlight (external light). Is a structure that does not directly hit.
- the attachment member 32 is made of, for example, a black synthetic resin material and is fixed to the housing 50.
- the second reflector 40 includes a concave mirror (reflecting portion) 41 that is a reflective mirror that reflects the display light L from the cold mirror 31 (that is, the liquid crystal display element 22), and the concave mirror. And a position adjusting means (driving means) 43 for adjusting the angular position (arrangement position) of the holding member 42 (concave mirror 41).
- the concave mirror 41 is formed by depositing the second reflective layer 41a on a resin substrate having a concave surface.
- the concave mirror 41 is disposed in an inclined state at a position where the second reflective layer 41a faces the cold mirror 31 and the translucent cover and faces the translucent cover.
- the concave mirror 41 reflects (projects) the display light L from the cold mirror 31 toward the translucent cover (the windshield 13 of the vehicle 10). This means that the concave mirror 41 enlarges the display light L reflected by the cold mirror 31 and projects the enlarged display light L onto the windshield 13 through the translucent cover.
- the holding member 42 is made of a synthetic resin material and includes a shaft portion (not shown) having a substantially cylindrical shape that is pivotally supported by a bearing portion (not shown) provided in the housing 50.
- the double-sided adhesive tape (not shown) is fixedly held between the concave mirror 41 and the holding member 42. Therefore, the holding member 42 and the concave mirror 41 held by the holding member 42 are configured to be pivotally supported so as to be movable (rotatable).
- the projecting piece 42 a is a projecting piece formed continuously from the holding member 42 and projecting in an arm shape from the side of the concave mirror 41, and the projecting piece 42 a is provided on the position adjusting means 43.
- the sandwiched contact portion 42b is integrally formed.
- the position adjusting means 43 is provided with a stepping motor 43a, a rotating shaft 43b, a power transmission member 43c, and a photo sensor (detecting means) 44.
- the stepping motor 43a generates a rotational driving force (driving force) for adjusting the arrangement position of the concave mirror 41, and the rotating shaft 43b is a screw groove formed in a spiral shape on the peripheral surface thereof. A lead screw is provided. The rotating shaft 43b is rotationally driven with the driving of the stepping motor 43a.
- the power transmission member 43c is made of a synthetic resin material such as polyacetal, and can move along the axial direction by the rotation of the rotating shaft 43b while sandwiching the contact portion 42b. By this movement, the position adjusting means 43 can rotate the second reflector 40.
- the position adjusting means 43 has a plate-like detected part 43d that extends from the power transmission member 43c and moves together with the power transmission member 43c.
- the detected portion 43d is provided so as to be detectable by a photosensor (detection means) 44 provided on one end side of the rotating shaft 43b.
- the photosensor 44 can be applied with a package component in which an IRLED (light source) 44a and a light receiving portion 44b disposed at a predetermined interval from the IRLED 44a are opposed to each other, and emits light emitted from the IRLED 44a, in this case, infrared light.
- the light can be converted into an electrical signal by the light receiving unit 44b.
- the control means can control the stepping motor 43a using the predetermined position (the position shown in FIG.
- the transmissive photosensor (photointerrupter) 44 is applied, but a configuration in which the detected portion 43d is detected by a reflective photosensor (photoreflector) can also be applied.
- the housing 50 is formed of, for example, aluminum die casting or a hard resin material, and includes an upper case body 51 and a lower case body 52 both having a substantially concave shape in cross section, and the upper case body 51 and the lower case body 52
- the liquid crystal display 20 (liquid crystal display element 22) and the reflectors 30 and 40 are accommodated in the space portion 53 that is an internal space formed by (see FIG. 2). For this reason, it is possible to prevent exposure from the photosensor 44 to the driver side and external light from reaching the photosensor 44.
- the upper case body 51 is formed with an opening window 51a that opens at the upper part (the windshield 13 side of the vehicle 10) where the concave mirror 41 is disposed.
- the opening window 51a includes an opening window 51a.
- a light-transmitting cover 54 that is a light-transmitting portion is disposed so as to close the cover.
- the translucent cover 54 is made of a translucent synthetic resin material and has a function as a light transmissive member through which the display light L reflected by the concave mirror 41 is transmitted (passed). That is, the display light L reflected by the concave mirror 41 is projected onto the windshield 13 through the translucent cover 54 formed on the housing 50, whereby the virtual image V is displayed.
- the display device 12 includes a control means 60, a motor driver 70, a stepping motor 43a, and a photo sensor 44.
- the control means 60 is provided with a storage unit such as a ROM or a RAM (not shown) used for storing a predetermined program and various data, a storage area at the time of calculation, a CPU for performing arithmetic processing according to the predetermined program, an input / output interface, and the like A microcomputer can be applied.
- a storage unit such as a ROM or a RAM (not shown) used for storing a predetermined program and various data, a storage area at the time of calculation, a CPU for performing arithmetic processing according to the predetermined program, an input / output interface, and the like
- a microcomputer can be applied.
- the control means 60 is connected to the start switch K of the vehicle 10 and is connected to various sensors of the vehicle, the electronic control unit E, and the operation means S provided in the instrument panel or the steering via a communication line. Ten kinds of information can be input.
- the control means 60 is connected to issue a control signal to the motor driver 70 and the liquid crystal display 20 (the liquid crystal display element 22 and the light source 21) based on a predetermined program.
- the motor driver 70 is a circuit that generates a drive signal for driving the stepping motor 43 a based on a control signal from the control means 60. Further, the motor driver 70 is provided with an input port 71 for inputting a signal (enable signal) indicating a drive permission state when the operation is permitted (when rotation is permitted) based on a control signal from the control means 60. The signal is also connected to a switch unit (transistor) 72 that switches the presence or absence of power supply from the power source B to the photosensor 44.
- a switch unit (transistor) 72 that switches the presence or absence of power supply from the power source B to the photosensor 44.
- the stepping motor 43a rotates the rotating shaft 43b based on the signal indicating the drive permission state from the control means 60, and the position / orientation of the power transmission member 43c, that is, the second reflector 40 according to the rotation angle. To move.
- the photosensor 44 includes an IRLED 44a and a light receiving unit 44b.
- the power supply B supplied based on a signal from the control means 60 performs light emission by the IRLED 44a and output of a detection signal by the light receiving unit 44b.
- the power source B of the photosensor 44 uses a 3V power source obtained by stepping down the power from the in-vehicle battery using a regulator, and the presence / absence of power supply is switched via the switch unit 72.
- the driver (user) 14 adjusts to a desired angle (display position) by the operation means S, for example, based on the start switch K, for example, when the stepping motor 43a is permitted to operate. Only when the power is supplied to the photosensor 44, the reference position can be detected. For this reason, during normal use in which the head-up display is displayed for traveling, the operation of the photosensor 44, in particular, the IRLED 44a does not emit light, so that unnecessary power consumption, deterioration of the light emitting element, and heat generation can be reduced.
- control means 60 is connected to the liquid crystal display 20 so as to be controllable, the light source 21 is turned off when the photosensor 44 is operated (when the stepping motor 43a is operated), so that the display light L Eliminates degradation in reference position detection accuracy.
- the head-up display includes the liquid crystal display 20 that generates a display image, the concave mirror 41 that reflects the display image from the liquid crystal display 20, the position adjusting unit 43 that varies the reflection direction of the concave mirror 41, and the IRLED 44a. And a photosensor 44 for detecting a reference position of the concave mirror 41 that is changed by the position adjusting means 43 according to the light receiving state of the light emitted from the IRLED 44a, and a control for controlling the operation of the position adjusting means 43 and the photosensor 44. And means 60.
- the head-up display is characterized in that the photo sensor 44 further includes an IR LED 44a and a light receiving unit 44b that outputs an electric signal to the control means based on the light emitted from the IR LED 44a.
- the head-up display is characterized in that the control means 60 further controls the operation of the photosensor 44 by switching the presence or absence of power supply to the photosensor 44 via the position adjustment means 43.
- the operation means S only when the driver (user) 14 adjusts to a desired angle (display position) by the operation means S, for example, by the operation means S, that is, when the stepping motor 43a permits the operation.
- the power supply to the photosensor 44 can be performed, and the reference position can be detected. For this reason, during normal use in which the head-up display is displayed for traveling, the operation of the photosensor 44, in particular, the IRLED 44a does not emit light, so that unnecessary power consumption, deterioration of the light emitting element, and heat generation can be reduced.
- the IR LED 44a emits infrared light
- the liquid crystal display 20 the position adjusting means 43, the photo sensor 44, and the control means 60 are accommodated in the same casing.
- the head-up display of the present disclosure is a head-up display provided with detection means with low power consumption of the IRLED 44a.
- the head-up display according to the present invention has been described by way of example in the configuration of the above-described embodiment, the present invention is not limited to this, and other configurations do not depart from the gist of the present invention. It goes without saying that various improvements in design, design changes, and part of the configuration can be omitted.
- the photo sensor 44 has been shown to detect the position of the second reflector 40 based on the position of the power transmission member 43c.
- the photo sensor 44 is configured to detect a part of the second reflector as a detected portion. Also good.
- the signal from the control means 60 to the motor driver 70 is also used, and power is supplied to the photosensor 44 only when the operation of the stepping motor 43a is permitted, thereby detecting the reference position.
- the configuration in which the photo sensor 44 is mounted on the position adjusting unit 43 is shown.
- the photosensor 44 can be configured to be placed at an arbitrary location in the casing away from the position adjusting means 43. In this case, restrictions on the layout of each structure are relatively reduced, and the layout of other structures can be easily performed.
- the configuration in which the position of the power transmission member 43c is changed using the rotating shaft 43b and the angle of the concave mirror 41 is adjusted is shown. However, even if the rotating shaft 43b is not used. Good. For example, a configuration in which the power source is directly arranged on the rotating shaft of the concave mirror 41 may be employed.
- the present disclosure relates to a head-up display, and is suitable, for example, as a vehicle display device mounted on a moving body including an automobile, a motorcycle, an agricultural machine, or a construction machine.
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Abstract
Provided is a headup display that is equipped with a detection means having a small power consumption. This headup display is characterized by being provided with: a display 20 that generates a display image; a reflecting section 41 that reflects the display image transmitted from the display 20; a drive means 43 that changes the reflecting direction of the reflecting section 41; a detection means 44, which has a light source 44a, and which detects the reference position of the reflecting section 41, said reference position being changed by means of the drive means 43 in accordance with the reception state of light emitted from the light source 44a; and a control means 60 that controls operations of the drive means 43 and the detection means 44.
Description
本開示は、ヘッドアップディスプレイに関し、特に、投影方向を可変できる車両用ヘッドアップディスプレイに好適である。
The present disclosure relates to a head-up display, and is particularly suitable for a vehicle head-up display that can change the projection direction.
従来のヘッドアップディスプレイとして、表示光を投射部材へ反射する反射手段の位置を、当該装置を使用しない停止状態においては太陽光が反射手段を介して筐体内の表示器に入射しない位置に移動させ、稼働状態においては停止状態の位置から復帰するように構成し、ヘッドアップディスプレイを使用しない状況において太陽光が反射手段を介して筐体内の表示器に入射して劣化する虞を低減するものが、例えば、特許文献1に開示されている。
As a conventional head-up display, the position of the reflecting means that reflects the display light to the projection member is moved to a position where sunlight does not enter the display in the housing through the reflecting means in a stop state where the device is not used. In the operating state, it is configured to return from the position of the stopped state, and in the situation where the head-up display is not used, the sun light is incident on the display in the housing through the reflecting means to reduce the possibility of deterioration. For example, it is disclosed in Patent Document 1.
また、上述反射手段の位置を調整することで、利用者毎の最適な表示位置(投影位置)を提供する構成もあり、例えば、調整用モーターと該反射部材の基準位置と検出するためのフォトインタラプタを用いるものが開示されている(例えば、特許文献2に開示)。
In addition, there is a configuration that provides an optimum display position (projection position) for each user by adjusting the position of the reflection means, for example, a photo for detecting the adjustment motor and the reference position of the reflection member. A device using an interrupter is disclosed (for example, disclosed in Patent Document 2).
上述のように、フォトインタラプタを用いて反射部材の基準位置を検出する構成にあっては、検出するための電力が必要なため、省電力な構成を得るために改善の余地があった。
As described above, in the configuration in which the reference position of the reflecting member is detected using the photo interrupter, there is room for improvement in order to obtain a power saving configuration because electric power for detection is required.
そこで本開示の目的は、上述課題に着目してなされ、消費電力の少ない検出手段を備えたヘッドアップディスプレイを提供することにある。
Therefore, an object of the present disclosure is to provide a head-up display provided with detection means that consumes less power and focuses on the above-described problems.
本発明のヘッドアップディスプレイは、表示像を生成する表示器と、この表示器からの前記表示像を反射する反射部と、この反射部の反射方向を変動する駆動手段と、光源を有し、この光源から発する光の受光状態に応じて前記駆動手段により変動する前記反射部の基準位置を、検出する検出手段と、前記駆動手段及び前記検出手段の作動を制御する制御手段と、を備えることを特徴とする。
The head-up display of the present invention includes a display that generates a display image, a reflection unit that reflects the display image from the display, a drive unit that changes the reflection direction of the reflection unit, and a light source. A detecting unit that detects a reference position of the reflecting portion that is fluctuated by the driving unit according to a light receiving state of light emitted from the light source; and a control unit that controls the operation of the driving unit and the detecting unit. It is characterized by.
本開示のヘッドアップディスプレイは、消費電力の少ない検出手段を備えたヘッドアップディスプレイを提供する。
The head-up display according to the present disclosure provides a head-up display including a detection unit with low power consumption.
以下、添付図面に基づいて、本発明を車両用のヘッドアップディスプレイに適用した一実施形態を説明する。
Hereinafter, an embodiment in which the present invention is applied to a head-up display for a vehicle will be described with reference to the accompanying drawings.
ヘッドアップディスプレイは、図1に示すように車両10のインパネ11内部に配設された表示ユニットである表示装置12が投射する表示光Lを投影部材である車両10のフロントガラス13で車両10の運転者(観察者)14の方向に反射させ、虚像Vの表示を行う。換言すれば、ヘッドアップディスプレイは、表示装置12の後述する液晶表示器から発せられる表示光Lをフロントガラス13(前記投影部材)に出射し、この出射によって得られた表示像(虚像)Vを運転者14に視認させる。これにより運転者14は、虚像Vを風景と重畳させて観察できる。
As shown in FIG. 1, the head-up display is configured such that the display light L projected by the display device 12 that is a display unit disposed inside the instrument panel 11 of the vehicle 10 is the windshield 13 of the vehicle 10 that is a projection member. The virtual image V is displayed by reflecting in the direction of the driver (observer) 14. In other words, the head-up display emits display light L emitted from a liquid crystal display (to be described later) of the display device 12 to the windshield 13 (the projection member), and displays a display image (virtual image) V obtained by the emission. The driver 14 visually recognizes the driver. As a result, the driver 14 can observe the virtual image V superimposed on the landscape.
表示装置12は、図2に示すように液晶表示器20と、第1反射器30と、第2反射器40と、ハウジング(筐体)50とから主に構成されている。
表示 As shown in FIG. 2, the display device 12 mainly includes a liquid crystal display 20, a first reflector 30, a second reflector 40, and a housing (housing) 50.
液晶表示器20は、配線基板Rに実装された発光ダイオードからなる光源21と、この光源21からの照明光を透過して表示光Lを形成するように光源21の前方側(真上)に位置するTFT型の液晶表示素子(表示素子)22とから主に構成される。このことは、液晶表示素子22の背後(直下)に光源21が配設され、液晶表示素子22が生成する表示像は、光源21から発せられる光により、所定情報(後述する表示すべき情報)を表示する表示光Lとして出力されることを意味している。
The liquid crystal display 20 has a light source 21 formed of a light emitting diode mounted on the wiring board R and a front side (directly above) the light source 21 so as to transmit the illumination light from the light source 21 and form the display light L. It is mainly composed of a TFT-type liquid crystal display element (display element) 22 positioned. This is because the light source 21 is disposed behind (directly below) the liquid crystal display element 22, and the display image generated by the liquid crystal display element 22 is generated by predetermined information (information to be displayed later) by light emitted from the light source 21. Is output as display light L for displaying.
この液晶表示器20は、表示光Lの出射側の面が第1反射器30の後述するコールドミラーに対向するようにしてハウジング50内に設けられ、表示光Lの光軸が前記コールドミラーに交わるような位置や向きにて固定保持される。
The liquid crystal display 20 is provided in the housing 50 so that the surface on the emission side of the display light L faces a cold mirror (to be described later) of the first reflector 30, and the optical axis of the display light L is on the cold mirror. Fixed and held at a crossing position and orientation.
また液晶表示素子22は、図示しない素子駆動回路によって表示すべき情報(例えば車両の速度やエンジン回転数)を、数値等で発光表示する。液晶表示器20は、可視波長域の光からなる表示光Lを出力するもので、例えば赤色光(主に発光波長域610~640nm)を発する光源21を適用できる。なお、前記表示すべき情報は、車両の速度やエンジン回転数に限らず、あらゆる表示形態を採用できることは言うまでもない。
Further, the liquid crystal display element 22 emits and displays information (for example, the speed of the vehicle and the engine speed) to be displayed by an element driving circuit (not shown) by numerical values. The liquid crystal display 20 outputs display light L composed of light in the visible wavelength range. For example, a light source 21 that emits red light (mainly emission wavelength range of 610 to 640 nm) can be applied. Needless to say, the information to be displayed is not limited to the speed of the vehicle and the engine speed, and any display form can be adopted.
第1反射器30は、コールドミラー31と、このコールドミラー31を所定の取付手段を用いて取付固定するための取付部材32とを有している。
The first reflector 30 includes a cold mirror 31 and an attachment member 32 for attaching and fixing the cold mirror 31 using predetermined attachment means.
コールドミラー31は、略矩形状のガラス基板31aと、このガラス基板31aの片面(第2反射器40の後述する凹面鏡と向かい合う面)に形成された第1の反射層31bとを有する。この第1の反射層31bは、膜厚が異なる多層の干渉膜からなるものであり、蒸着等の方法で形成されている。また、コールドミラー31は、液晶表示器20が発した表示光Lを、第2反射器40(前記凹面鏡)側へ反射させるような位置に傾斜状態にて配設される。
コ ー ル The cold mirror 31 includes a substantially rectangular glass substrate 31a and a first reflecting layer 31b formed on one surface of the glass substrate 31a (a surface facing a concave mirror described later of the second reflector 40). The first reflective layer 31b is composed of multilayer interference films having different film thicknesses, and is formed by a method such as vapor deposition. The cold mirror 31 is disposed in an inclined state at a position where the display light L emitted from the liquid crystal display 20 is reflected to the second reflector 40 (the concave mirror) side.
また本実施形態の場合、コールドミラー31並びに液晶表示器20は、ハウジング50の後述する透光性カバーから直接、臨めない位置に配設され、前記太陽光等の外部からの光(外光)が直接、当たらない構造となっている。なお、取付部材32は、例えば黒色の合成樹脂材料からなり、ハウジング50に固定されてなる。
In the case of the present embodiment, the cold mirror 31 and the liquid crystal display 20 are arranged at a position where they cannot directly face a translucent cover (to be described later) of the housing 50, and light from outside such as sunlight (external light). Is a structure that does not directly hit. The attachment member 32 is made of, for example, a black synthetic resin material and is fixed to the housing 50.
第2反射器40は、図2乃至図4に示すように、コールドミラー31(つまり、液晶表示素子22)からの表示光Lを反射させる反射ミラーである凹面鏡(反射部)41と、この凹面鏡41を保持するミラーホルダからなる保持部材42と、この保持部材42(凹面鏡41)の角度位置(配設位置)を調整するための位置調整手段(駆動手段)43とを有している。
As shown in FIGS. 2 to 4, the second reflector 40 includes a concave mirror (reflecting portion) 41 that is a reflective mirror that reflects the display light L from the cold mirror 31 (that is, the liquid crystal display element 22), and the concave mirror. And a position adjusting means (driving means) 43 for adjusting the angular position (arrangement position) of the holding member 42 (concave mirror 41).
凹面鏡41は、凹面を有する樹脂基板に第2の反射層41aを蒸着形成したものである。この凹面鏡41は、その第2の反射層41aがコールドミラー31並びに前記透光性カバーに対向し、前記透光性カバーから臨める位置に傾斜状態にて配設される。
凹 The concave mirror 41 is formed by depositing the second reflective layer 41a on a resin substrate having a concave surface. The concave mirror 41 is disposed in an inclined state at a position where the second reflective layer 41a faces the cold mirror 31 and the translucent cover and faces the translucent cover.
また凹面鏡41は、コールドミラー31からの表示光Lを拡大しつつ、前記透光性カバー(車両10のフロントガラス13)側へ反射(投射)させるものである。このことは、凹面鏡41が、コールドミラー31によって反射された表示光Lを拡大し、この拡大された表示光Lを前記透光性カバーを通じてフロントガラス13に投射することを意味している。
凹 Moreover, the concave mirror 41 reflects (projects) the display light L from the cold mirror 31 toward the translucent cover (the windshield 13 of the vehicle 10). This means that the concave mirror 41 enlarges the display light L reflected by the cold mirror 31 and projects the enlarged display light L onto the windshield 13 through the translucent cover.
保持部材42は、合成樹脂材料からなり、ハウジング50に設けられた軸受部(図示省略)に軸支される略円柱状からなる図示しない軸部を備えている。なお、この場合、凹面鏡41と保持部材42との間には両面粘着テープ(図示省略)が介在した状態で、固定保持されている。したがって、保持部材42並びにこれに保持される凹面鏡41は、角度移動可能(回動可能)に軸支された構成となっている。
保持 The holding member 42 is made of a synthetic resin material and includes a shaft portion (not shown) having a substantially cylindrical shape that is pivotally supported by a bearing portion (not shown) provided in the housing 50. In this case, the double-sided adhesive tape (not shown) is fixedly held between the concave mirror 41 and the holding member 42. Therefore, the holding member 42 and the concave mirror 41 held by the holding member 42 are configured to be pivotally supported so as to be movable (rotatable).
図3に示すように、突出片42aは、保持部材42から連続して形成され、凹面鏡41の脇からアーム状に突出形成された突出片であり、この突出片42aは、位置調整手段43に挟持される接触部42bが一体形成されている。
As shown in FIG. 3, the projecting piece 42 a is a projecting piece formed continuously from the holding member 42 and projecting in an arm shape from the side of the concave mirror 41, and the projecting piece 42 a is provided on the position adjusting means 43. The sandwiched contact portion 42b is integrally formed.
位置調整手段43は、ステッピングモータ43aと、回転軸43bと、動力伝達部材43cと、フォトセンサ(検出手段)44とを設けている。
The position adjusting means 43 is provided with a stepping motor 43a, a rotating shaft 43b, a power transmission member 43c, and a photo sensor (detecting means) 44.
ステッピングモータ43aは、凹面鏡41の配設位置の調整を実行させるための回転駆動力(駆動力)を発するものであり、また回転軸43bは、その周面において螺旋状に形成されてなるねじ溝からなるリードスクリューを備えている。回転軸43bは、ステッピングモータ43aの駆動に伴い回転駆動されるようになっている。
The stepping motor 43a generates a rotational driving force (driving force) for adjusting the arrangement position of the concave mirror 41, and the rotating shaft 43b is a screw groove formed in a spiral shape on the peripheral surface thereof. A lead screw is provided. The rotating shaft 43b is rotationally driven with the driving of the stepping motor 43a.
動力伝達部材43cは、ポリアセタール等の合成樹脂材料からなり、接触部42bを挟持しながら、回転軸43bの回転により軸方向に沿い移動できる。この移動によって、位置調整手段43は、第2反射器40を回動できる。
動力 The power transmission member 43c is made of a synthetic resin material such as polyacetal, and can move along the axial direction by the rotation of the rotating shaft 43b while sandwiching the contact portion 42b. By this movement, the position adjusting means 43 can rotate the second reflector 40.
図3,4に示すように、位置調整手段43には、動力伝達部材43cから延びて動力伝達部材43cと伴に移動される板状の被検出部43dを有している。被検出部43dは、回転軸43bの一端側に設けられるフォトセンサ(検出手段)44により検出可能に設けられる。
As shown in FIGS. 3 and 4, the position adjusting means 43 has a plate-like detected part 43d that extends from the power transmission member 43c and moves together with the power transmission member 43c. The detected portion 43d is provided so as to be detectable by a photosensor (detection means) 44 provided on one end side of the rotating shaft 43b.
フォトセンサ44は、IRLED(光源)44aと、IRLED44aから所定間隔おいて配置される受光部44bとを対向して設けたパッケージ部品を適用でき、IRLED44aから発せられる光、この場合、赤外光を、受光部44bによって電気信号に変換して出力できる。IRLED44aと受光部44bとの間に遮光する被検出部43dが介在するか否かの切り替わりを検出することによって、動力伝達部材43cや第2反射器40の所定位置を後述する制御手段によって判別できる。また、該制御手段は、この所定位置(図3(a)に示す位置及び図4の点線位置)を基準位置としてステッピングモータ43aを制御できる。なお、この場合、透過型フォトセンサ(フォトインタラプタ)44を適用するが、反射型フォトセンサ(フォトリフレクタ)によって、被検出部43dを検出する構成を適用することもできる。
The photosensor 44 can be applied with a package component in which an IRLED (light source) 44a and a light receiving portion 44b disposed at a predetermined interval from the IRLED 44a are opposed to each other, and emits light emitted from the IRLED 44a, in this case, infrared light. The light can be converted into an electrical signal by the light receiving unit 44b. By detecting the switching of whether or not the detected portion 43d that shields light is interposed between the IRLED 44a and the light receiving portion 44b, the predetermined positions of the power transmission member 43c and the second reflector 40 can be determined by the control means described later. . Further, the control means can control the stepping motor 43a using the predetermined position (the position shown in FIG. 3A and the dotted line position in FIG. 4) as a reference position. In this case, the transmissive photosensor (photointerrupter) 44 is applied, but a configuration in which the detected portion 43d is detected by a reflective photosensor (photoreflector) can also be applied.
ハウジング50は、例えばアルミダイカストもしくは硬質樹脂材料にて形成されてなり、ともに断面略凹部形状からなる上側ケース体51と下側ケース体52とを備え、上側ケース体51と下側ケース体52とで形成される内部空間である空間部53において、液晶表示器20(液晶表示素子22)と、各反射器30、40とを収容する(図2参照)。このため、フォトセンサ44から運転者側への露光や、外光がフォトセンサ44へ届くのを防止できる。
The housing 50 is formed of, for example, aluminum die casting or a hard resin material, and includes an upper case body 51 and a lower case body 52 both having a substantially concave shape in cross section, and the upper case body 51 and the lower case body 52 The liquid crystal display 20 (liquid crystal display element 22) and the reflectors 30 and 40 are accommodated in the space portion 53 that is an internal space formed by (see FIG. 2). For this reason, it is possible to prevent exposure from the photosensor 44 to the driver side and external light from reaching the photosensor 44.
上側ケース体51には、凹面鏡41の配設位置の上部(車両10のフロントガラス13側)が開口する開口窓部51aが形成されており、この開口窓部51aには、開口窓部51aを塞ぐように透光部である透光性カバー54が配設されている。
The upper case body 51 is formed with an opening window 51a that opens at the upper part (the windshield 13 side of the vehicle 10) where the concave mirror 41 is disposed. The opening window 51a includes an opening window 51a. A light-transmitting cover 54 that is a light-transmitting portion is disposed so as to close the cover.
この透光性カバー54は、透光性の合成樹脂材料からなり、凹面鏡41で反射された表示光Lが透過(通過)する光透過性部材としての機能を有している。つまり、凹面鏡41によって反射された表示光Lは、ハウジング50に形成された透光性カバー54を通じてフロントガラス13に投影され、これにより虚像Vの表示が行われることになる。
The translucent cover 54 is made of a translucent synthetic resin material and has a function as a light transmissive member through which the display light L reflected by the concave mirror 41 is transmitted (passed). That is, the display light L reflected by the concave mirror 41 is projected onto the windshield 13 through the translucent cover 54 formed on the housing 50, whereby the virtual image V is displayed.
次に、図5、6を用いて、フォトセンサ44による被検出部43dの検出に関する構成について説明する。
Next, the configuration relating to the detection of the detected part 43d by the photosensor 44 will be described with reference to FIGS.
表示装置12は、制御手段60と、モータドライバ70と、ステッピングモータ43aと、フォトセンサ44とを備えている。
The display device 12 includes a control means 60, a motor driver 70, a stepping motor 43a, and a photo sensor 44.
制御手段60は、所定プログラムや各種データの格納、演算時の記憶領域などに用いる図示しないROMやRAM等の記憶部と、前記所定プログラムに従って演算処理するためのCPUと、入出力インターフェース等を設けたマイクロコンピュータを適用できる。
The control means 60 is provided with a storage unit such as a ROM or a RAM (not shown) used for storing a predetermined program and various data, a storage area at the time of calculation, a CPU for performing arithmetic processing according to the predetermined program, an input / output interface, and the like A microcomputer can be applied.
また、制御手段60は、車両10の起動スイッチKと接続するとともに、車両の各種センサや電子制御ユニットEや、インパネまたはステアリングに設けられる操作手段Sと通信線を介して接続しており、車両10の各種情報を入力できる。制御手段60は、所定プログラムに基づいてモータドライバ70や液晶表示器20(液晶表示素子22と光源21)に制御信号を発するように接続される。
The control means 60 is connected to the start switch K of the vehicle 10 and is connected to various sensors of the vehicle, the electronic control unit E, and the operation means S provided in the instrument panel or the steering via a communication line. Ten kinds of information can be input. The control means 60 is connected to issue a control signal to the motor driver 70 and the liquid crystal display 20 (the liquid crystal display element 22 and the light source 21) based on a predetermined program.
モータドライバ70は、制御手段60からの制御信号に基づいて、ステッピングモータ43aを駆動する駆動信号を発する回路である。また、モータドライバ70は、制御手段60からの制御信号に基づいて作動許可状態時(回動許可時)に、駆動許可状態を示す信号(イネーブル信号)を入力する入力ポート71を設けており、該信号は、フォトセンサ44への電源Bからなされる電力供給の有無を切り換えるスイッチ部(トランジスタ)72にも接続される。
モ ー タ The motor driver 70 is a circuit that generates a drive signal for driving the stepping motor 43 a based on a control signal from the control means 60. Further, the motor driver 70 is provided with an input port 71 for inputting a signal (enable signal) indicating a drive permission state when the operation is permitted (when rotation is permitted) based on a control signal from the control means 60. The signal is also connected to a switch unit (transistor) 72 that switches the presence or absence of power supply from the power source B to the photosensor 44.
ステッピングモータ43aは、制御手段60からの該駆動許可状態を示す信号に基づいて回転軸43bを回転させ、この回転角度に応じて動力伝達部材43c、しいては第2反射器40の位置・向きを移動する。
The stepping motor 43a rotates the rotating shaft 43b based on the signal indicating the drive permission state from the control means 60, and the position / orientation of the power transmission member 43c, that is, the second reflector 40 according to the rotation angle. To move.
フォトセンサ44は、IRLED44aと、受光部44bとを備え、制御手段60からの信号に基づいて供給される電源Bによって、IRLED44aによる発光と、受光部44bによる検出信号の出力を行い、検出信号は、制御手段60へ伝えられる。なお、この場合、フォトセンサ44の電源Bは、車載バッテリからの電力をレギュレータを用いて降圧した3V電源を用いており、スイッチ部72を介して電源供給の有無が切り換えられる。
The photosensor 44 includes an IRLED 44a and a light receiving unit 44b. The power supply B supplied based on a signal from the control means 60 performs light emission by the IRLED 44a and output of a detection signal by the light receiving unit 44b. To the control means 60. In this case, the power source B of the photosensor 44 uses a 3V power source obtained by stepping down the power from the in-vehicle battery using a regulator, and the presence / absence of power supply is switched via the switch unit 72.
上述した構成によって、起動スイッチKに基づく初期動作や、例えば、操作手段Sによって、運転者(利用者)14が所望の角度(表示位置)に調整する際、すなわちステッピングモータ43aが作動許可させる際にのみ、フォトセンサ44への電力供給を行い、基準位置の検出動作を行うことができる。このため、ヘッドアップディスプレイを表示して走行する通常使用時においては、フォトセンサ44の作動、特に、IRLED44aの発光をしないことから、余計な電力消費や発光素子の劣化や発熱を低減できる。
With the above-described configuration, when the driver (user) 14 adjusts to a desired angle (display position) by the operation means S, for example, based on the start switch K, for example, when the stepping motor 43a is permitted to operate. Only when the power is supplied to the photosensor 44, the reference position can be detected. For this reason, during normal use in which the head-up display is displayed for traveling, the operation of the photosensor 44, in particular, the IRLED 44a does not emit light, so that unnecessary power consumption, deterioration of the light emitting element, and heat generation can be reduced.
また、制御手段60は、液晶表示器20を制御可能に接続しているため、フォトセンサ44を作動する際(ステッピングモータ43aを作動する際)に光源21を消灯させることで、表示光Lによる基準位置の検出精度の低下を無くする。
In addition, since the control means 60 is connected to the liquid crystal display 20 so as to be controllable, the light source 21 is turned off when the photosensor 44 is operated (when the stepping motor 43a is operated), so that the display light L Eliminates degradation in reference position detection accuracy.
以上ヘッドアップディスプレイは、表示像を生成する液晶表示器20と、この液晶表示器20からの前記表示像を反射する凹面鏡41と、この凹面鏡41の反射方向を変動する位置調整手段43と、IRLED44aを有し、このIRLED44aから発する光の受光状態に応じて位置調整手段43により変動する凹面鏡41の基準位置を、検出するフォトセンサ44と、位置調整手段43及びフォトセンサ44の作動を制御する制御手段60と、を備えることを特徴とする。
As described above, the head-up display includes the liquid crystal display 20 that generates a display image, the concave mirror 41 that reflects the display image from the liquid crystal display 20, the position adjusting unit 43 that varies the reflection direction of the concave mirror 41, and the IRLED 44a. And a photosensor 44 for detecting a reference position of the concave mirror 41 that is changed by the position adjusting means 43 according to the light receiving state of the light emitted from the IRLED 44a, and a control for controlling the operation of the position adjusting means 43 and the photosensor 44. And means 60.
またヘッドアップディスプレイは、フォトセンサ44は、更にはIRLED44aと、このIRLED44aから発する光に基づいて電気信号を前記制御手段へ出力する受光部44bと、を設けることを特徴とする。
In addition, the head-up display is characterized in that the photo sensor 44 further includes an IR LED 44a and a light receiving unit 44b that outputs an electric signal to the control means based on the light emitted from the IR LED 44a.
またヘッドアップディスプレイは、更には制御手段60は、位置調整手段43を介して、フォトセンサ44へ電力供給の有無を切り換えてフォトセンサ44の作動を制御することを特徴とする。
Further, the head-up display is characterized in that the control means 60 further controls the operation of the photosensor 44 by switching the presence or absence of power supply to the photosensor 44 via the position adjustment means 43.
これにより、起動スイッチKに基づく初期動作や、例えば、操作手段Sによって、運転者(利用者)14が所望の角度(表示位置)に調整する際、すなわちステッピングモータ43aが作動許可させる際にのみ、フォトセンサ44への電力供給を行い、基準位置の検出動作を行うことができる。このため、ヘッドアップディスプレイを表示して走行する通常使用時においては、フォトセンサ44の作動、特に、IRLED44aの発光をしないことから、余計な電力消費や発光素子の劣化や発熱を低減できる。
Thereby, only when the driver (user) 14 adjusts to a desired angle (display position) by the operation means S, for example, by the operation means S, that is, when the stepping motor 43a permits the operation. The power supply to the photosensor 44 can be performed, and the reference position can be detected. For this reason, during normal use in which the head-up display is displayed for traveling, the operation of the photosensor 44, in particular, the IRLED 44a does not emit light, so that unnecessary power consumption, deterioration of the light emitting element, and heat generation can be reduced.
またヘッドアップディスプレイは、更にはIRLED44aは赤外光を発し、液晶表示器20と、位置調整手段43と、フォトセンサ44と、制御手段60とが、同一の筐体内に収容されることを特徴とする。
In the head-up display, the IR LED 44a emits infrared light, and the liquid crystal display 20, the position adjusting means 43, the photo sensor 44, and the control means 60 are accommodated in the same casing. And
これにより、IRLED44aが発する光の運転者側への露光や、フォトセンサ44への外光の照射を防止できる。
Thereby, it is possible to prevent exposure of the light emitted from the IRLED 44a to the driver side and irradiation of the photosensor 44 with external light.
したがって、本開示のヘッドアップディスプレイは、IRLED44a消費電力の少ない検出手段を備えたヘッドアップディスプレイとなる。
し た が っ て Therefore, the head-up display of the present disclosure is a head-up display provided with detection means with low power consumption of the IRLED 44a.
なお、本発明のヘッドアップディスプレイを上述した実施形態の構成にて例に挙げて説明したが、本発明はこれに限定されるものではなく、他の構成においても、本発明の要旨を逸脱しない範囲において種々の改良、並びに設計の変更、構成の一部を省くことが可能なことは勿論である。
Although the head-up display according to the present invention has been described by way of example in the configuration of the above-described embodiment, the present invention is not limited to this, and other configurations do not depart from the gist of the present invention. It goes without saying that various improvements in design, design changes, and part of the configuration can be omitted.
例えば、フォトセンサ44は、動力伝達部材43cの位置に基づいて第2反射器40の位置を検出するものを示したが、第2反射器の一部を被検出部として検出する構成であっても良い。
For example, the photo sensor 44 has been shown to detect the position of the second reflector 40 based on the position of the power transmission member 43c. However, the photo sensor 44 is configured to detect a part of the second reflector as a detected portion. Also good.
また、上述実施形態にあっては、制御手段60からモータドライバ70への信号を兼用し、ステッピングモータ43aを作動許可させる際にのみ、フォトセンサ44への電力供給を行い、基準位置の検出動作を行う構成を示したが、制御手段60からフォトセンサ44へ専用の駆動許可信号を発するように構成することもできる。この場合、例えば、起動スイッチKのオフ/オンが切り替わってから所定時間だけ該駆動許可信号を発するなどして、ステッピングモータ43aが作動していない状態であっても、フォトセンサ44による基準位置の検出や誤動作検出を行うこともできる。
In the above-described embodiment, the signal from the control means 60 to the motor driver 70 is also used, and power is supplied to the photosensor 44 only when the operation of the stepping motor 43a is permitted, thereby detecting the reference position. However, it is also possible to provide a dedicated drive permission signal from the control means 60 to the photosensor 44. In this case, for example, even when the stepping motor 43a is not in operation, for example, by issuing the drive permission signal for a predetermined time after the start switch K is switched off / on, Detection and malfunction detection can also be performed.
また、上述実施形態にあっては、フォトセンサ44を位置調整手段43に載置するような構成を示した。これにより支持構造において被検出部43dとフォトセンサ44との間に介在する構造物が極力少ない構成になっているため、フォトセンサ44による被検出部43dの位置検出の精度が向上している。しかし、フォトセンサ44を位置調整手段43から離れた筐体内の任意の箇所に載置するように構成することもできる。この場合は各構造物の配置レイアウトの制約が比較的少なくなり、他の構造物の配置レイアウトが容易に行えるようになる。
In addition, in the above-described embodiment, the configuration in which the photo sensor 44 is mounted on the position adjusting unit 43 is shown. Thereby, since the structure interposed between the to-be-detected part 43d and the photosensor 44 in the supporting structure is as small as possible, the position detection accuracy of the to-be-detected part 43d by the photosensor 44 is improved. However, the photosensor 44 can be configured to be placed at an arbitrary location in the casing away from the position adjusting means 43. In this case, restrictions on the layout of each structure are relatively reduced, and the layout of other structures can be easily performed.
また、上述実施形態にあっては、回転軸43bを用いて動力伝達部材43cの位置を変動させ、凹面鏡41の角度を調整する構成を示したが、回転軸43bを用いない構成であってもよい。例えば、凹面鏡41の回転軸に直接動力源を配置する構成であってもよい。
Further, in the above-described embodiment, the configuration in which the position of the power transmission member 43c is changed using the rotating shaft 43b and the angle of the concave mirror 41 is adjusted is shown. However, even if the rotating shaft 43b is not used. Good. For example, a configuration in which the power source is directly arranged on the rotating shaft of the concave mirror 41 may be employed.
本開示は、ヘッドアップディスプレイに関し、例えば、自動車やオートバイ、あるいは農業機械や建設機械を備えた移動体に搭載される車両用表示装置として好適である。
The present disclosure relates to a head-up display, and is suitable, for example, as a vehicle display device mounted on a moving body including an automobile, a motorcycle, an agricultural machine, or a construction machine.
10 車両
11 インパネ
12 表示装置
13 フロントガラス(投影部材)
14 運転者(観察者)
20 液晶表示器
21 光源
22 液晶表示素子(表示素子)
30 第1反射器
31 コールドミラー
40 第2反射器
41 凹面鏡(反射部材)
42 保持部材
42a 突出片
42b 接触部
43 位置調整手段(駆動手段)
43a ステッピングモータ(駆動部材)
43b 回転軸
43c 動力伝達部材
43d 被検出部
44 透過型フォトセンサ(検出手段)
44a IRLED(光源)
44b 受光部
50 ハウジング(筐体)
60 制御手段
70 モータドライバ
71 入力ポート
72 スイッチ部
L 表示光
V 虚像
K 起動スイッチ
S 操作手段
DESCRIPTION OFSYMBOLS 10 Vehicle 11 Instrument panel 12 Display apparatus 13 Windshield (projection member)
14 Driver (observer)
20Liquid crystal display 21 Light source 22 Liquid crystal display element (display element)
30First reflector 31 Cold mirror 40 Second reflector 41 Concave mirror (reflecting member)
42 holdingmember 42a protruding piece 42b contact portion 43 position adjusting means (driving means)
43a Stepping motor (drive member)
43b Rotating shaft 43c Power transmission member 43d Detected part 44 Transmission type photosensor (detection means)
44a IRLED (light source)
44b Light-receivingpart 50 Housing (housing)
60 Control means 70Motor driver 71 Input port 72 Switch part L Display light V Virtual image K Start switch S Operation means
11 インパネ
12 表示装置
13 フロントガラス(投影部材)
14 運転者(観察者)
20 液晶表示器
21 光源
22 液晶表示素子(表示素子)
30 第1反射器
31 コールドミラー
40 第2反射器
41 凹面鏡(反射部材)
42 保持部材
42a 突出片
42b 接触部
43 位置調整手段(駆動手段)
43a ステッピングモータ(駆動部材)
43b 回転軸
43c 動力伝達部材
43d 被検出部
44 透過型フォトセンサ(検出手段)
44a IRLED(光源)
44b 受光部
50 ハウジング(筐体)
60 制御手段
70 モータドライバ
71 入力ポート
72 スイッチ部
L 表示光
V 虚像
K 起動スイッチ
S 操作手段
DESCRIPTION OF
14 Driver (observer)
20
30
42 holding
43a Stepping motor (drive member)
44a IRLED (light source)
44b Light-receiving
60 Control means 70
Claims (4)
- 表示像を生成する表示器と、
この表示器からの前記表示像を反射する反射部と、
この反射部の反射方向を変動する駆動手段と、
光源を有し、この光源から発する光の受光状態に応じて前記駆動手段により変動する前記反射部の基準位置を、検出する検出手段と、
前記駆動手段及び前記検出手段の作動を制御する制御手段と、
を備えることを特徴とするヘッドアップディスプレイ。 A display for generating a display image;
A reflection part for reflecting the display image from the display;
Driving means for changing the reflection direction of the reflecting portion;
A detecting unit that has a light source and detects a reference position of the reflecting unit that varies by the driving unit according to a light receiving state of light emitted from the light source;
Control means for controlling the operation of the drive means and the detection means;
A head-up display comprising: - 前記検出手段は、前記光源と、この光源から発する光に基づいて電気信号を前記制御手段へ出力する受光部と、を設けることを特徴とする請求項1に記載のヘッドアップディスプレイ。 The head-up display according to claim 1, wherein the detection unit includes the light source and a light receiving unit that outputs an electric signal to the control unit based on light emitted from the light source.
- 前記制御手段は、前記駆動手段を介して、前記検出手段への電源供給の有無を切り換えて前記検出手段の作動を制御することを特徴とする請求項1または2に記載のヘッドアップディスプレイ。 The head-up display according to claim 1, wherein the control unit controls the operation of the detection unit by switching the presence or absence of power supply to the detection unit via the driving unit.
- 前記光源は、赤外光を発し、
前記表示器と、前記駆動手段と、前記検出手段と、同一の筐体内に収容されることを特徴とする請求項1乃至3のいずれか1項に記載のヘッドアップディスプレイ。
The light source emits infrared light;
4. The head-up display according to claim 1, wherein the display, the driving unit, and the detection unit are accommodated in the same casing. 5.
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JP2018-030245 | 2018-02-23 | ||
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JP2005017505A (en) * | 2003-06-24 | 2005-01-20 | Nippon Seiki Co Ltd | Display device |
JP2006224919A (en) * | 2005-02-21 | 2006-08-31 | Yazaki Corp | Virtual image display device for vehicle |
JP2014137283A (en) * | 2013-01-17 | 2014-07-28 | Mitsubishi Electric Corp | Rotation detection device |
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JP2005017505A (en) * | 2003-06-24 | 2005-01-20 | Nippon Seiki Co Ltd | Display device |
JP2006224919A (en) * | 2005-02-21 | 2006-08-31 | Yazaki Corp | Virtual image display device for vehicle |
JP2014137283A (en) * | 2013-01-17 | 2014-07-28 | Mitsubishi Electric Corp | Rotation detection device |
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