WO2016076342A1 - Head up display device - Google Patents

Head up display device Download PDF

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Publication number
WO2016076342A1
WO2016076342A1 PCT/JP2015/081683 JP2015081683W WO2016076342A1 WO 2016076342 A1 WO2016076342 A1 WO 2016076342A1 JP 2015081683 W JP2015081683 W JP 2015081683W WO 2016076342 A1 WO2016076342 A1 WO 2016076342A1
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WO
WIPO (PCT)
Prior art keywords
mirror
head
display device
display
shielding
Prior art date
Application number
PCT/JP2015/081683
Other languages
French (fr)
Japanese (ja)
Inventor
尚 山添
広川　拓郎
Original Assignee
日本精機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2015212180A external-priority patent/JP6579319B2/en
Application filed by 日本精機株式会社 filed Critical 日本精機株式会社
Priority to EP15858147.0A priority Critical patent/EP3220186B1/en
Priority to CN201580061256.6A priority patent/CN107111133A/en
Priority to US15/526,078 priority patent/US10114218B2/en
Publication of WO2016076342A1 publication Critical patent/WO2016076342A1/en

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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

Definitions

  • the present invention relates to a head-up display device with a measure against sunlight.
  • Patent Document 1 As shown in FIG. 1 of Patent Document 1, the image light beam emitted upward from the HUD display (2) (the numbers in parentheses indicate the symbols described in Patent Document 1. The same applies hereinafter) It hits the inner surface of (5) and is reflected and imaged in front of the driver (Patent Document 1, paragraph [0012]). When not in use, external light (sunlight) is prevented from reaching the HUD display (2) by blocking the optical path with the shutter (4). Thus, damage to the HUD display (2) can be prevented (Patent Document 1, paragraph [0006]).
  • the head-up display device becomes expensive and large. Moreover, since the shutter (4) is open when not in use, that is, during operation, it is not possible to prevent sunlight from entering at this time. There is a need for a structure that can prevent the incidence of sunlight at all times, including during operation.
  • a reflective polarizing film (21) (the numbers in parentheses indicate the symbols described in Patent Document 2. The same applies hereinafter) is interposed in the optical path. Due to the presence of the reflective polarizing film (21), the temperature of the liquid crystal shell (16) does not rise even when sunlight (b) is incident (Patent Document 2, paragraph [0013]). In addition, the reflective polarizing film (21) is stuck on the upper surface of the glass substrate (22).
  • Patent Document 2 it is possible to always take measures against sunlight.
  • the reflective polarizing film (21) and the glass substrate (22) are essential, the head-up display device is likely to be expensive and large.
  • the head-up display device is required to be reduced in size and cost, a device capable of taking measures against sunlight without using a shutter or a reflective polarizing film is desired.
  • JP 2003-237411 A Japanese Patent No. 4114194
  • This invention makes it a subject to provide the head-up display apparatus which can take a sunlight countermeasure, without using a shutter and a reflective polarizing film.
  • the inventors of the present invention tried to improve the head-up display device described in FIG. 1 of Patent Document 2 previously proposed by the inventors.
  • the improved apparatus 100 will be described with reference to FIG.
  • a head-up display device 100 shown in FIG. 1 is a primary improvement type device, and in contrast to the device described in Patent Document 2, between the concave mirror 101 and the plane mirror 102, the shielding plate 104 and the optical path 103 are very close to each other.
  • the shielding plate 105 is extended.
  • the sunlight 106 is reflected by the concave mirror 101, hits the shielding plate 104, stops, and does not have to worry about reaching the display 107.
  • the present inventors have made further improvements, completed a secondary improved device, and succeeded in taking good solar countermeasures. That is, the head-up display device 10 shown in FIG. 2 is a basic configuration diagram of the secondary improvement device.
  • the head-up display device 10 includes a display 13 that is disposed on the light source 11 and emits display light 12, and a first mirror that reflects the display light 12 emitted from the display 13.
  • a case 20 for storage is a case 20 for storage.
  • the first concave mirror 14 has a curvature (reciprocal of the radius) that causes the reflected display light 15 to cross up and down before reaching the second concave mirror 16, and the second concave mirror 16 receives the received display light. Plays a reflective role. That is, the first concave mirror 14 has a curvature such that the focal point of the first concave mirror 14 is located between the first concave mirror 14 and the second concave mirror 16. In other words, the distance from the first concave mirror 14 to the second concave mirror 16 is set longer than the focal length of the first concave mirror 14.
  • the case 20 includes a first shielding part 23 and a second shielding part 24 that extend to the vicinity of the crossing point 22 that crosses the optical path 21 between the first and second concave mirrors 14 and 16.
  • the lower end (front end) of the first shielding part 23 connects at least the upper end part P1 of the reflection area of the display light 12 in the first concave mirror 14 and the upper end part P2 of the reflection area of the display light 15 in the second concave mirror 16. It is located on the cross point 22 side (lower side) with respect to the elliptical line segment L1.
  • the upper end (front end) of the second shielding part 24 connects at least the lower end part P3 of the reflection area of the display light 12 in the first concave mirror 14 and the lower end part P4 of the reflection area of the display light 15 in the second concave mirror 16. It is located closer to the cross point 22 (upper side) than the ellipse segment L2.
  • first and second shielding parts 23 and 24 extend so that their tips approach each other. The closer the tips are, the higher the shielding property of the external light 25, which is desirable. That is, it is desirable that the tips of each other are close to the cross point 22 (focal point).
  • the end of the reflection region coincides with the end of the mirror surface formed in a concave shape. If a masking tape or the like is provided on the mirror surface, the exposed end of the mirror surface can be referred to as the end of the reflection region.
  • first and second shielding parts 23 and 24 play a role of blocking outside light
  • other parts of the case 20 parts away from the shielding parts 23 and 24, for example, bottom parts, hereinafter referred to as general parts 26. Higher temperature. Therefore, it is desired that the first and second shielding parts 23 and 24 have higher heat resistance than the general part 26 of the case 20.
  • the heat-resistant temperature there is a correlation between the heat-resistant temperature and the melting temperature. That is, if the melting temperature is high, the heat resistant temperature is high, and if the melting temperature is low, the heat resistant temperature tends to be low. Table 1 lists the melting temperature as a reference value for the heat-resistant temperature. The heat-resistant temperature is shown only for the epoxy resin that is a thermosetting resin.
  • Combination Example 1 and Combination Example 2 were obtained by combining resins. In combination example 3, resin and light metal were combined.
  • the first and second shielding parts 23 and 24 are made of aluminum die-cast products, but the aluminum die-cast products are integrated into the general part 26 of the case 20 by insert molding, bonding, screwing or an equivalent bonding method. To do.
  • the thermal conductivity may be increased.
  • the thermal conductivity is increased, the movement of heat is promoted, and as a result, the temperatures of the first and second shielding parts 23 and 24 are lowered.
  • the strength against heat of the first and second shielding parts 23 and 24 can be increased.
  • first and second shielding portions 23 and 24 are reflective surfaces, reflected light is generated, and the reflected light returns to the second concave mirror 16 and is reflected and strikes the first and second shielding portions 23 and 24. It is worried that it goes to the first concave mirror 14 without.
  • anti-reflection treatment films 27 and 27 that weaken or block the reflection of external light are formed on the first and second shielding portions 23 and 24 at least at the site where the external light 25 hits.
  • the antireflection treatment film 27 is suitably black alumite if the base material is black paint and aluminum.
  • the antireflection treatment may be a treatment for roughening a sandblasted surface.
  • the invention according to claim 1 includes the display 13 that emits the display light 12, the first mirror 14 that reflects the display light 12 emitted from the display 13, and the first mirror 14.
  • the first mirror 14 Is a first concave mirror having a curvature that causes the reflected display light 15 to cross up and down before reaching the second mirror 16, and the second mirror 16 reflects the received display light.
  • the case 20 includes a first shielding portion 23 and a second shielding portion 24 that extend to the vicinity of the cross point 2 that crosses the optical path 21 between the first and second concave mirrors. ,in front The outside light 25 that enters the case 20 from the outside of the case 20, is reflected by the second concave mirror, and travels toward the first concave mirror is shielded by the first and second shielding portions 23 and 24. .
  • the first and second shielding portions 23 and 24 are formed of a material having a higher thermal conductivity than the general portion 26 of the case 20.
  • the first and second shielding portions 23 and 24 are formed of a material having a heat resistant temperature higher than that of the general portion 26 of the case 20.
  • the first and second shielding portions 23, 24 are subjected to an antireflection treatment for weakening or blocking the reflection of the external light at least at the site where the external light hits.
  • the case 20 includes a center frame that supports the first and second concave mirrors 14 and 16 and includes a second shielding part 24, and a first shielding part 23 that is attached on the center frame.
  • An upper cover and a lower cover attached under the center frame.
  • the center frame is a metal molded product
  • the lower cover is a resin molded product
  • the upper cover is a resin molded product or a metal molded product.
  • the metal molded product is an aluminum die-cast product.
  • the case includes a center frame that supports the first and second concave mirrors and includes a second shielding portion, and an upper cover that is attached on the center frame and includes the first shielding portion.
  • the upper cover is a resin molded product, A metal plate is disposed on at least the upper surface of the first shielding part, The density of the resin used for the material of the resin molded product is smaller than the density of the metal plate, The heat resistance temperature of the metal plate is higher than the heat resistance temperature of the resin.
  • the first mirror is a first concave mirror having a curvature that causes the reflected display light to cross up and down before reaching the second mirror. At the crossing point where the light crosses, the width of the optical path becomes small.
  • the first shielding portion and the second shielding portion are extended near the cross point, and external light such as sunlight is shielded by the first shielding portion and the second shielding portion. Most of the outside light is shielded by the first and second shielding parts, and cannot reach the first concave mirror or the display part. Therefore, according to the present invention, there is provided a head-up display device capable of taking measures against sunlight without using a shutter or a reflective polarizing film.
  • the first and second shielding parts are formed of a material having a higher thermal conductivity than the general part of the case. Since the heat conductivity is high, heat transfer in the first and second shielding portions can be promoted, and the temperature of the first and second shielding portions can be lowered. That is, it is possible to suppress heat from staying in the first and second shielding portions that are likely to become high temperature.
  • the first and second shielding portions are formed of a material having a heat resistant temperature higher than that of the general portion of the case.
  • the first and second shielding portions are subjected to an antireflection treatment for weakening or blocking the reflection of the external light at least at the site where the external light hits. There is no fear that the external light hitting the first and second shielding parts will return to the second concave mirror.
  • the case includes a center frame that supports the first and second concave mirrors and includes a second shielding portion, an upper cover that is mounted on the center frame and includes the first shielding portion, and a center frame. A lower cover, which is mounted underneath. If the first concave mirror and the second concave mirror are attached to separate covers, it is necessary to adjust the optical axis in consideration of the dimensional error of each cover, and this adjustment becomes troublesome. In the present invention, since the first concave mirror and the second concave mirror are attached to a common center frame, the optical axes of the first concave mirror and the second concave mirror can be easily adjusted.
  • the center frame is a metal molded product
  • the lower cover is a resin molded product
  • the upper cover is a resin molded product or a metal molded product. If it is a metal molded product, it is rich in rigidity. Since the first and second concave mirrors are attached to the rigid center frame, the optical axis is well maintained.
  • a metal molded product generally has a higher heat resistant temperature and higher thermal conductivity than a resin molded product.
  • the metal molded product is an aluminum die-cast product.
  • the metal molded product may be a metal press product, but the shape of the press product cannot be complicated. If it is a cast product, it can be a complicated shape, but it is difficult to reduce the thickness. In this respect, die-cast products can be thinned and thinned, and are suitable for complex shapes. In addition, if aluminum, it is lightweight and the weight of the apparatus can be reduced.
  • a metal plate is disposed on the upper surface of the first shielding part which is a resin molded product.
  • a 1st shielding part is a site
  • external light strikes the upper surface of the first shielding part.
  • sunlight is given.
  • High heat resistance is calculated
  • the overall head-up display device is desired to be lightweight.
  • the resin used for the upper cover has a lower density (lower) than the metal plate. For this reason, the weight of the head-up display device can be reduced by using the upper cover as a resin molded product.
  • the metal plate has a higher heat resistance temperature (heat resistance) than the resin used for the upper cover. For this reason, heat resistance can be improved by arrange
  • FIG. 3 is a basic configuration diagram of a second improved product, that is, a head-up display device according to the present invention.
  • 1 is an exploded view of a head-up display device according to Embodiment 1 of the present invention. It is sectional drawing of the head-up display apparatus which concerns on Example 1 of this invention. It is a figure explaining the shielding effect of the 1st and 2nd shielding part. It is a figure explaining the heat flow in the 1st, 2nd shielding part. It is a figure explaining the example of a change of a center frame. It is sectional drawing of the head-up display apparatus which concerns on Example 2 of this invention. It is a disassembled perspective view of an upper cover and a metal plate. It is a figure explaining the example of a change of a metal plate.
  • the case 20 includes a center frame 30 that supports the first and second concave mirrors 14 and 16 and includes a second shielding portion 24, and the center frame 30.
  • the upper cover 50 is provided with the first shielding portion 23 attached thereto, and the lower cover 55 is attached under the center frame 30.
  • the center frame 30 is an aluminum die-cast product having mounting flanges 31 and 31 on the outer periphery and a second shielding part 24 extending obliquely upward inside.
  • a stay 32 is welded to the center frame 30, and the first concave mirror 14 is fixed to the stay 32 with an adhesive layer 33.
  • the second concave mirror 16 is fixed to the stays 34 to 36 welded to the inner surface of the center frame 30 with adhesive layers 37 to 39.
  • the center frame 30 is an aluminum die-cast product, the strength is much higher than that of a resin molded product, and the rigidity is high. Since the first and second concave mirrors 14 and 16 and the display 13 are collectively attached to the rigid center frame 30, it is difficult to adjust these optical axes. Furthermore, the rigid center frame 30 is attached to the vehicle by attachment flanges 31 and 31. If the cover is entirely made of resin, the rigidity may be insufficient and the optical axis may need to be readjusted. On the other hand, since the head-up display device 10 of the embodiment is rich in rigidity, the concern is small.
  • the upper cover 50 is, for example, a polycarbonate molded product, and includes a cover glass 51 on the upper surface and integrally includes a first shielding portion 23 that extends obliquely downward.
  • the lower cover 55 is a bottomed cylindrical body that opens upward, and is, for example, an ABS resin molded product and includes a printed circuit board 56.
  • the lower cover 55 is attached to the center frame 30 with screws 57 and 57 from below, and the upper cover 50 is attached with screws 52 from above.
  • the head-up display device 10 shown in FIG. 4 is completed.
  • the display light 12 emitted from the display unit 13 is reflected by the first concave mirror 14, and the display light 15 reflected by the first concave mirror 14 passes between the first and second shielding parts 23 and 24,
  • the second concave mirror 16 is reached.
  • the display light 17 reflected by the second concave mirror 16 rises and reaches the vehicle windshield 66 (projection unit 66 on which the reflected display light 17 is projected).
  • the external light 25 represented by sunlight passes through the cover glass 51, is reflected by the second concave mirror 16, and is reflected by the first shielding unit 23. Shielded. Since the 1st shielding part 23 is a polycarbonate excellent in heat resistance, the intensity
  • the external light 25 passes through the cover glass 51, is reflected by the second concave mirror 16, and is shielded by the second shielding part 24, as shown in FIG. Since the 2nd shielding part 24 is aluminum which is further excellent in heat resistance, the intensity
  • PC resin has a thermal conductivity of about 0.2 W / m / K.
  • ADC12 aluminum die-cast product
  • FIG. 6A is a diagram for explaining a very simple heat transfer model, in which one end of a polycarbonate (PC) resin rod 59 has a high temperature t1p and a lower temperature t2p than the other end t1p (t2p is higher than the atmospheric temperature t3).
  • PC polycarbonate
  • Q1p is calculated by the following equation: thermal conductivity ⁇ p ⁇ bar length ⁇ (t1p ⁇ t2p).
  • Q2p is calculated by the heat transfer coefficient cp ⁇ (t2p ⁇ t3).
  • one end of the rod 59 of the aluminum die-cast product is in a thermally steady state at a high temperature t1a and a temperature t2a lower than t1a at the other end (t2a is higher than the atmospheric temperature t3).
  • the heat Q1a flowing inside the bar 59 is equal to the heat Q2a released from the other end of the bar 59 to the atmosphere.
  • Q1a is calculated as follows: thermal conductivity ⁇ a ⁇ bar length ⁇ (t1a ⁇ t2a).
  • Q2a is calculated by the heat transfer coefficient ca ⁇ (t2a ⁇ t3).
  • the first shielding part 23 is also made of the same aluminum die cast as the second shielding part 24 or light metal.
  • an aluminum die-cast product 63 in which heat radiation fins 61 are integrally formed on the first shielding part 23 is manufactured in advance, and the aluminum die-cast product 63 is placed in a cavity of a molding die, and a PC resin 64 is placed in the cavity.
  • injection so-called insert molding can be performed.
  • the heat is transmitted through the first shielding part 23 and reaches the radiation fin 61. Since the radiation fin 61 has a large heat radiation area, it actively releases heat toward the atmosphere.
  • the entire upper cover 50 may be made of aluminum die casting or light metal. ⁇ Example 2>
  • FIG. 8 shows a cross-sectional configuration of the head-up display device of the second embodiment.
  • FIG. 8 is shown corresponding to FIG.
  • a metal plate 71 is disposed on the upper surface of the first shielding part 23.
  • Other basic configurations are the same as those of the head-up display device 10 according to the first embodiment (see FIG. 4).
  • omitted about the part which is common in Example 1, while using a code
  • the upper cover 50A is a resin molded product, and for example, a mixed resin material of polycarbonate and polyethylene terephthalate (PET) can be used.
  • PET polyethylene terephthalate
  • Aluminum or aluminum alloy can be used for the material of the metal plate 71.
  • the resin used as the material of the resin molded product is smaller than the density of the metal used for the metal plate 71.
  • the heat resistance temperature of the resin used for the material is lower than the heat resistance temperature of the metal used for the metal plate 71. That is, the heat resistance temperature of the metal plate 71 is higher than the heat resistance temperature of the resin. If these conditions are satisfied, an arbitrary material can be selected as the resin or metal.
  • the metal plates 71 are attached to the upper cover 50A.
  • the metal plates 71 are respectively attached to the upper surface of the first shielding portion 23 and the inner surfaces of the left and right side surfaces of the upper cover 50A extending forward from the left and right ends of the upper surface. These can be referred to as design surfaces that are visible from the outside. That is, the metal plate 71 is disposed on the design surface. The design property can be further improved by spreading the metal plate 71 on the visible portion.
  • the metal plate 71 can be disposed on the upper cover 50A by an arbitrary method such as sticking with a double-sided tape, bonding with an adhesive, screwing with a screw, or locking with a fixing hook.
  • a metal plate 71 is disposed on the upper surface of the first shielding part 23 that is a resin molded product.
  • the 1st shielding part 23 is a site
  • sunlight is given. High heat resistance is required for the first shielding part 23 that is exposed to sunlight.
  • the head-up display device 10A as a whole is desired to be lightweight.
  • the resin used for the upper cover 50 ⁇ / b> A has a density smaller (lower) than that of the metal plate 71.
  • the weight of the head-up display device 10A can be reduced by using the upper cover 50A as a resin molded product.
  • the metal plate 71 has a heat resistant temperature (heat resistance) higher than that of the resin used for the upper cover 50A. For this reason, heat resistance can be improved by arrange
  • FIG. 10 shows a modified example of the head-up display device 10B in which the metal plate 71B is modified. That is, the metal plate 71B can be configured by a single plate. Even in this case, the predetermined effect of the present invention can be obtained. Moreover, when comprised by 1 sheet, since the seam of metal plates does not exist compared with the case where comprised by several board, designability can be improved more.
  • the head-up display device of the present invention is suitable for a passenger car, but may be applied to general vehicles, ships, and aircraft. That is, the present invention is not limited to the examples as long as the operations and effects of the present invention are exhibited.
  • the head-up display device of the present invention is suitable for a vehicle including a windshield.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Instrument Panels (AREA)

Abstract

The problem addressed by the present invention is to provide a head up display device capable of counteracting sunlight without using a shutter or a reflection type polarizing film. A first concave mirror (14) has a curvature to cause the reflected display light (15) to intersect vertically before reaching a second mirror (16), and a second concave mirror (16) serves to reflect the received display light. A case (20) is provided with a first shield (23) and a second shield (24) extending near an intersecting point (22) to sandwich a light path (21) between the first and second concave mirrors (14, 16). The first and second shields (23, 24) can block external light (25) entering into the case (20) from outside the case (20) and proceeding toward the first concave mirror (14) after being reflected from the second concave mirror (16).

Description

ヘッドアップディスプレイ装置Head-up display device
　本発明は、太陽光対策を施したヘッドアップディスプレイ装置に関する。 The present invention relates to a head-up display device with a measure against sunlight.
 　車両の運転者は、フロントガラスを通して前方を注視すると共に、インストルメントパネル上の計器類を目視しながら運転を実施する。すなわち、視線が前方と下方の計器類とへ移動する。前方を見たままで、計器類を見ることができれば、視線の移動がなく、運転性の向上が期待できる。この知見からヘッドアップディスプレイ装置が開発され、実用に供されるようになってきた。ヘッドアップディスプレイ装置に関する従来技術として、特許文献１に開示される技術がある。 車 両 The vehicle driver observes the front through the windshield and carries out the operation while viewing the instruments on the instrument panel. That is, the line of sight moves to the front and lower instruments. If you can see the instruments while looking forward, you can expect to improve your drivability without moving your line of sight. From this knowledge, a head-up display device has been developed and put into practical use. As a conventional technique related to a head-up display device, there is a technique disclosed in Patent Document 1.
　特許文献１の図１に示されるように、ＨＵＤ表示器（２）（括弧付き数字は、特許文献１に記載された符号を示す。以下同様）から上へ出射された画像光線は、フロントガラス（５）の内面に当たり、反射され運転者の前方に結像される（特許文献１、段落番号［００１２］）。不使用時は、シャッタ（４）で光路を遮断することで、外光（太陽光）がＨＵＤ表示器（２）に到達しないようにする。これで、ＨＵＤ表示器（２）の損傷を防止することができる（特許文献１、段落番号［０００６］）。 As shown in FIG. 1 of Patent Document 1, the image light beam emitted upward from the HUD display (2) (the numbers in parentheses indicate the symbols described in Patent Document 1. The same applies hereinafter) It hits the inner surface of (5) and is reflected and imaged in front of the driver (Patent Document 1, paragraph [0012]). When not in use, external light (sunlight) is prevented from reaching the HUD display (2) by blocking the optical path with the shutter (4). Thus, damage to the HUD display (2) can be prevented (Patent Document 1, paragraph [0006]).
　シャッタ（４）及びこのシャッタ（４）を駆動する駆動手段が必要であるため、ヘッドアップディスプレイ装置が高価になると共に大型になる。その上、不使用時でないとき、すなわち運転中は、シャッタ（４）が開いているため、このときには太陽光の入射を防ぐことができない。運転中を含め、常時、太陽光の入射を防ぐことができる構造が求められる。 Since the shutter (4) and the driving means for driving the shutter (4) are required, the head-up display device becomes expensive and large. Moreover, since the shutter (4) is open when not in use, that is, during operation, it is not possible to prevent sunlight from entering at this time. There is a need for a structure that can prevent the incidence of sunlight at all times, including during operation.
　そこで、本発明者らは、先に、シャッタを用いることなく太陽光対策を講じたヘッドアップディスプレイ装置を提案した。太陽光対策を講じたヘッドアップディスプレイ装置に関する従来技術として、特許文献２に開示される技術がある。 Therefore, the present inventors previously proposed a head-up display device in which measures against sunlight were taken without using a shutter. As a conventional technique related to a head-up display device that takes measures against sunlight, there is a technique disclosed in Patent Document 2.
　特許文献２の図１に示されるように、光路に反射型偏光フィルム（２１）（括弧付き数字は、特許文献２に記載された符号を示す。以下同様）を介在させる。反射型偏光フィルム（２１）の存在により、太陽光（ｂ）が入射しても液晶シェル（１６）の温度は上昇しない（特許文献２、段落番号［００１３］）。なお、反射型偏光フィルム（２１）はガラス基板（２２）の上面に貼着されている。 As shown in FIG. 1 of Patent Document 2, a reflective polarizing film (21) (the numbers in parentheses indicate the symbols described in Patent Document 2. The same applies hereinafter) is interposed in the optical path. Due to the presence of the reflective polarizing film (21), the temperature of the liquid crystal shell (16) does not rise even when sunlight (b) is incident (Patent Document 2, paragraph [0013]). In addition, the reflective polarizing film (21) is stuck on the upper surface of the glass substrate (22).
　特許文献２によれば、常時、太陽光対策を講じることができる。しかし、反射型偏光フィルム（２１）及びガラス基板（２２）が必須であるため、ヘッドアップディスプレイ装置が高価になると共に大型になる心配がある。 According to Patent Document 2, it is possible to always take measures against sunlight. However, since the reflective polarizing film (21) and the glass substrate (22) are essential, the head-up display device is likely to be expensive and large.
　ヘッドアップディスプレイ装置の小型化及び低コスト化が求められる中、シャッタや反射型偏光フィルムを用いないで、太陽光対策を講じることができる装置が望まれる。 As the head-up display device is required to be reduced in size and cost, a device capable of taking measures against sunlight without using a shutter or a reflective polarizing film is desired.
特開２００３－２３７４１１号公報JP 2003-237411 A 特許第４１１４１９４号公報Japanese Patent No. 4114194
　本発明は、シャッタや反射型偏光フィルムを用いないで、太陽光対策を講じることができるヘッドアップディスプレイ装置を提供することを課題とする。 This invention makes it a subject to provide the head-up display apparatus which can take a sunlight countermeasure, without using a shutter and a reflective polarizing film.
　本発明者らは、本発明者らが先に提案した特許文献２の図１に記載されるヘッドアップディスプレイ装置に、次に述べる改良を試みた。改良した装置１００を図１に基づいて説明する。 The inventors of the present invention tried to improve the head-up display device described in FIG. 1 of Patent Document 2 previously proposed by the inventors. The improved apparatus 100 will be described with reference to FIG.
　図１に示すヘッドアップディスプレイ装置１００は、一次改良型装置であり、特許文献２に記載された装置に対して、凹面鏡１０１と平面鏡１０２との間において、光路１０３のごく近傍まで遮蔽板１０４及び遮蔽板１０５を延ばした。太陽光１０６は、凹面鏡１０１で反射され、遮蔽板１０４に当たって止まり、表示器１０７に到達する心配はない。 A head-up display device 100 shown in FIG. 1 is a primary improvement type device, and in contrast to the device described in Patent Document 2, between the concave mirror 101 and the plane mirror 102, the shielding plate 104 and the optical path 103 are very close to each other. The shielding plate 105 is extended. The sunlight 106 is reflected by the concave mirror 101, hits the shielding plate 104, stops, and does not have to worry about reaching the display 107.
　ところで、近年、表示像の大型化が求められ、結果、ケース１０８の上部に開けた開口１０９が大きくなり、凹面鏡１０１が大型化し、光路１０３の幅が増大する。表示像が大型化するほど、太陽光が侵入し易くなり、その対策が求められる。 Incidentally, in recent years, an increase in the size of the display image has been demanded, and as a result, the opening 109 opened in the upper portion of the case 108 becomes larger, the concave mirror 101 becomes larger, and the width of the optical path 103 increases. The larger the display image, the easier it is for sunlight to enter, and countermeasures are required.
　本発明者らは、さらに改良を進め、二次改良型装置を完成し、良好な太陽光対策を講じることに成功した。すなわち、図２に示すヘッドアップディスプレイ装置１０が、二次改良装置の基本構成図である。 The present inventors have made further improvements, completed a secondary improved device, and succeeded in taking good solar countermeasures. That is, the head-up display device 10 shown in FIG. 2 is a basic configuration diagram of the secondary improvement device.
　図２に示すように、ヘッドアップディスプレイ装置１０は、光源１１の上に配置され表示光１２を出射する表示器１３と、この表示器１３で出射された表示光１２を反射する第１ミラーとしての第１凹面鏡１４と、この第１凹面鏡１４で反射された表示光１５を反射する第２ミラーとしての第２凹面鏡１６と、光源１１、表示器１３、第１・第２凹面鏡１４、１６を収納するケース２０と、を備えている。 As shown in FIG. 2, the head-up display device 10 includes a display 13 that is disposed on the light source 11 and emits display light 12, and a first mirror that reflects the display light 12 emitted from the display 13. A first concave mirror 14, a second concave mirror 16 as a second mirror that reflects display light 15 reflected by the first concave mirror 14, a light source 11, a display 13, and first and second concave mirrors 14, 16. And a case 20 for storage.
　さらには、第１凹面鏡１４は、反射された表示光１５を第２凹面鏡１６に到達する前に上下でクロスさせる曲率（半径の逆数）を有し、第２凹面鏡１６は、受けた表示光を反射する役割を果たす。即ち、第１凹面鏡１４は、第１凹面鏡１４と第２凹面鏡１６との間に第１凹面鏡１４の焦点が位置するような曲率を有する。さらに換言すれば、第１凹面鏡１４から第２凹面鏡１６までの距離は、第１凹面鏡１４の焦点距離よりも長く設定されている。 Furthermore, the first concave mirror 14 has a curvature (reciprocal of the radius) that causes the reflected display light 15 to cross up and down before reaching the second concave mirror 16, and the second concave mirror 16 receives the received display light. Plays a reflective role. That is, the first concave mirror 14 has a curvature such that the focal point of the first concave mirror 14 is located between the first concave mirror 14 and the second concave mirror 16. In other words, the distance from the first concave mirror 14 to the second concave mirror 16 is set longer than the focal length of the first concave mirror 14.
　ケース２０は、第１・第２凹面鏡１４、１６間の光路２１を挟むように、且つクロスするクロス点２２の近傍まで延びる第１遮蔽部２３及び第２遮蔽部２４を備えている。ケース２０外からケース２０内に侵入し第２凹面鏡１６で反射され第１凹面鏡１４に向かう外光２５を、第１・第２遮蔽部２３、２４で遮蔽することができる。 The case 20 includes a first shielding part 23 and a second shielding part 24 that extend to the vicinity of the crossing point 22 that crosses the optical path 21 between the first and second concave mirrors 14 and 16. External light 25 that enters the case 20 from the outside of the case 20, is reflected by the second concave mirror 16, and travels toward the first concave mirror 14 can be shielded by the first and second shielding portions 23 and 24.
　第１遮蔽部２３の下端（先端部）は、少なくとも、第１凹面鏡１４における表示光１２の反射領域の上端部Ｐ１、及び、第２凹面鏡１６における表示光１５の反射領域の上端部Ｐ２を結んだ線分Ｌ１よりもクロス点２２側（下側）に位置している。 The lower end (front end) of the first shielding part 23 connects at least the upper end part P1 of the reflection area of the display light 12 in the first concave mirror 14 and the upper end part P2 of the reflection area of the display light 15 in the second concave mirror 16. It is located on the cross point 22 side (lower side) with respect to the elliptical line segment L1.
　第２遮蔽部２４の上端（先端部）は、少なくとも、第１凹面鏡１４における表示光１２の反射領域の下端部Ｐ３、及び、第２凹面鏡１６における表示光１５の反射領域の下端部Ｐ４を結んだ線分Ｌ２よりもクロス点２２側（上側）に位置している。 The upper end (front end) of the second shielding part 24 connects at least the lower end part P3 of the reflection area of the display light 12 in the first concave mirror 14 and the lower end part P4 of the reflection area of the display light 15 in the second concave mirror 16. It is located closer to the cross point 22 (upper side) than the ellipse segment L2.
　なお、第１・第２遮蔽部２３、２４は、その先端が互いに近づくように延びている。その先端が互いに近いほど外光２５の遮蔽性が高く、望ましい。即ち、互いの先端がクロス点２２（焦点）に近接していることが望ましい。 Note that the first and second shielding parts 23 and 24 extend so that their tips approach each other. The closer the tips are, the higher the shielding property of the external light 25, which is desirable. That is, it is desirable that the tips of each other are close to the cross point 22 (focal point).
　一般に、反射領域の端部とは、凹状に形成された鏡面の端部に一致する。仮に、鏡面上にマスキングテープ等が設けられている場合には、鏡面のうち、露出している部位の端部が反射領域の端部ということができる。 Generally, the end of the reflection region coincides with the end of the mirror surface formed in a concave shape. If a masking tape or the like is provided on the mirror surface, the exposed end of the mirror surface can be referred to as the end of the reflection region.
　第１・第２遮蔽部２３、２４は外光を遮断する役割を果たすため、ケース２０の他の部位（遮蔽部２３、２４から離れた部位、例えば底部。以下、一般部２６と記す。）より、高温になる。そのため、ケース２０の一般部２６よりも第１・第２遮蔽部２３、２４は、耐熱性を高めることが望まれる。 Since the first and second shielding parts 23 and 24 play a role of blocking outside light, other parts of the case 20 (parts away from the shielding parts 23 and 24, for example, bottom parts, hereinafter referred to as general parts 26). Higher temperature. Therefore, it is desired that the first and second shielding parts 23 and 24 have higher heat resistance than the general part 26 of the case 20.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
　一般に耐熱温度と溶融温度との間には、相関関係が存在する。即ち、溶融温度が高ければ、耐熱温度が高く、溶融温度が低ければ、耐熱温度が低いという傾向がある。表１には、耐熱温度の参考値として、溶融温度が記載されている。熱硬化性樹脂であるエポキシ樹脂についてのみ、耐熱温度が示されている。 Generally, there is a correlation between the heat-resistant temperature and the melting temperature. That is, if the melting temperature is high, the heat resistant temperature is high, and if the melting temperature is low, the heat resistant temperature tends to be low. Table 1 lists the melting temperature as a reference value for the heat-resistant temperature. The heat-resistant temperature is shown only for the epoxy resin that is a thermosetting resin.
　組合せ例１と組合せ例２は、樹脂同士を組合せた。組合せ例３は、樹脂と軽金属を組合わせた。 Combination Example 1 and Combination Example 2 were obtained by combining resins. In combination example 3, resin and light metal were combined.
　組合せ例３では、第１・第２遮蔽部２３、２４をアルミニウムダイカスト品とするが、アルミニウムダイカスト品は、ケース２０の一般部２６にインサート成形、接着、ビス止め又は同等の接着法により一体化する。 In combination example 3, the first and second shielding parts 23 and 24 are made of aluminum die-cast products, but the aluminum die-cast products are integrated into the general part 26 of the case 20 by insert molding, bonding, screwing or an equivalent bonding method. To do.
　耐熱性を高める代わりに、熱伝導率を高めてもよい。熱伝導率を高めると、熱の移動が促され、結果として、第１・第２遮蔽部２３、２４の温度が低下する。第１・第２遮蔽部２３、２４の熱に対する強度を高めることができる。 Instead of increasing heat resistance, the thermal conductivity may be increased. When the thermal conductivity is increased, the movement of heat is promoted, and as a result, the temperatures of the first and second shielding parts 23 and 24 are lowered. The strength against heat of the first and second shielding parts 23 and 24 can be increased.
　第１・第２遮蔽部２３、２４の面が反射面であると、反射光が発生し、この反射光が第２凹面鏡１６に戻り、反射され、第１・第２遮蔽部２３、２４に当たることなく第１凹面鏡１４に向かうことが心配される。 If the surfaces of the first and second shielding portions 23 and 24 are reflective surfaces, reflected light is generated, and the reflected light returns to the second concave mirror 16 and is reflected and strikes the first and second shielding portions 23 and 24. It is worried that it goes to the first concave mirror 14 without.
　対策として、第１・第２遮蔽部２３、２４には、少なくとも外光２５が当たる部位に、外光の反射を弱める又は阻止する反射防止処理膜２７、２７を形成する。反射防止処理膜２７は、黒色塗料、母材がアルミニウムであれば黒色アルマイトが適当である。又は、反射防止処理は、平滑面にサンドブラストを打って粗面化する処理であってもよい。 As a countermeasure, anti-reflection treatment films 27 and 27 that weaken or block the reflection of external light are formed on the first and second shielding portions 23 and 24 at least at the site where the external light 25 hits. The antireflection treatment film 27 is suitably black alumite if the base material is black paint and aluminum. Alternatively, the antireflection treatment may be a treatment for roughening a sandblasted surface.
　以上の知見から、請求項１に係る発明は、表示光１２を出射する表示器１３と、この表示器１３で出射された表示光１２を反射する第１ミラー１４と、この第１ミラー１４で反射された表示光１５を反射する第２ミラー１６と、前記表示器１３、前記第１・第２ミラー１４、１６を収納するケース２０とを備えるヘッドアップディスプレイ装置１０において、前記第１ミラー１４は、反射された表示光１５を前記第２ミラー１６に到達する前に上下でクロスさせる曲率を有した第１凹面鏡であり、前記第２ミラー１６は、受けた表示光を反射する第２凹面鏡であり、前記ケース２０は、前記第１・第２凹面鏡間の光路２１を挟むように、且つ前記クロスするクロス点２の近傍まで延びる第１遮蔽部２３及び第２遮蔽部２４を備えており、前記ケース２０外からケース２０内に侵入し前記第２凹面鏡で反射され前記第１凹面鏡に向かう外光２５を、前記第１・第２遮蔽部２３、２４で遮蔽するようにしたことを特徴とする。 Based on the above knowledge, the invention according to claim 1 includes the display 13 that emits the display light 12, the first mirror 14 that reflects the display light 12 emitted from the display 13, and the first mirror 14. In the head-up display device 10 that includes the second mirror 16 that reflects the reflected display light 15, and the display 13 and the case 20 that houses the first and second mirrors 14 and 16, the first mirror 14 Is a first concave mirror having a curvature that causes the reflected display light 15 to cross up and down before reaching the second mirror 16, and the second mirror 16 reflects the received display light. The case 20 includes a first shielding portion 23 and a second shielding portion 24 that extend to the vicinity of the cross point 2 that crosses the optical path 21 between the first and second concave mirrors. ,in front The outside light 25 that enters the case 20 from the outside of the case 20, is reflected by the second concave mirror, and travels toward the first concave mirror is shielded by the first and second shielding portions 23 and 24. .
　請求項２に係る発明では、第１・第２遮蔽部２３、２４は、ケース２０の一般部２６よりも熱伝導率が高い材料で形成されている。 In the invention according to claim 2, the first and second shielding portions 23 and 24 are formed of a material having a higher thermal conductivity than the general portion 26 of the case 20.
　請求項３に係る発明では、第１・第２遮蔽部２３、２４は、ケース２０の一般部２６よりも耐熱温度が高い材料で形成されている。 In the invention according to claim 3, the first and second shielding portions 23 and 24 are formed of a material having a heat resistant temperature higher than that of the general portion 26 of the case 20.
　請求項４に係る発明では、第１・第２遮蔽部２３、２４には、少なくとも外光が当たる部位に、外光の反射を弱める又は阻止する反射防止処理が施されている。 In the invention according to claim 4, the first and second shielding portions 23, 24 are subjected to an antireflection treatment for weakening or blocking the reflection of the external light at least at the site where the external light hits.
　請求項５に係る発明では、ケース２０は、第１・第２凹面鏡１４、１６を支えると共に第２遮蔽部２４を備えるセンターフレームと、このセンターフレームの上に取付けられ第１遮蔽部２３を備える上カバーと、センターフレームの下に取付けられる下カバーと、からなる。 In the invention according to claim 5, the case 20 includes a center frame that supports the first and second concave mirrors 14 and 16 and includes a second shielding part 24, and a first shielding part 23 that is attached on the center frame. An upper cover and a lower cover attached under the center frame.
　請求項６に係る発明では、センターフレームは金属成形品であり、下カバーは樹脂成形品であり、上カバーは樹脂成形品又は金属成形品である。 In the invention according to claim 6, the center frame is a metal molded product, the lower cover is a resin molded product, and the upper cover is a resin molded product or a metal molded product.
　請求項７に係る発明では、金属成形品は、アルミニウムダイカスト品である。 In the invention according to claim 7, the metal molded product is an aluminum die-cast product.
　請求項８に係る発明では、ケースは、第１・第２凹面鏡を支えると共に第２遮蔽部を備えるセンターフレームと、このセンターフレームの上に取付けられ第１遮蔽部を備える上カバーと、を有し、
　上カバーは、樹脂成形品であり、
　少なくとも第１遮蔽部の上面には、金属板が配置され、
　樹脂成形品の素材に用いられる樹脂の密度は、金属板の密度よりも小さく、
　金属板の耐熱温度は、樹脂の耐熱温度よりも高い。 In the invention according to claim 8, the case includes a center frame that supports the first and second concave mirrors and includes a second shielding portion, and an upper cover that is attached on the center frame and includes the first shielding portion. And
The upper cover is a resin molded product,
A metal plate is disposed on at least the upper surface of the first shielding part,
The density of the resin used for the material of the resin molded product is smaller than the density of the metal plate,
The heat resistance temperature of the metal plate is higher than the heat resistance temperature of the resin.
　請求項１に係る発明では、第１ミラーは、反射された表示光を前記第２ミラーに到達する前に上下でクロスさせる曲率を有した第１凹面鏡である。クロスするクロス点では、光路の幅は小さくなる。このクロス点の近傍へ第１遮蔽部及び第２遮蔽部を延ばし、これらの第１遮蔽部及び第２遮蔽部で太陽光などの外光を遮蔽するようにした。外光の殆どが第１・第２遮蔽部で遮蔽され、第１凹面鏡や表示部に到達し得ない。
　よって、本発明によれば、シャッタや反射型偏光フィルムを用いないで、太陽光対策を講じることができるヘッドアップディスプレイ装置が提供される。 In the invention according to claim 1, the first mirror is a first concave mirror having a curvature that causes the reflected display light to cross up and down before reaching the second mirror. At the crossing point where the light crosses, the width of the optical path becomes small. The first shielding portion and the second shielding portion are extended near the cross point, and external light such as sunlight is shielded by the first shielding portion and the second shielding portion. Most of the outside light is shielded by the first and second shielding parts, and cannot reach the first concave mirror or the display part.
Therefore, according to the present invention, there is provided a head-up display device capable of taking measures against sunlight without using a shutter or a reflective polarizing film.
　請求項２に係る発明では、第１・第２遮蔽部は、ケースの一般部よりも熱伝導率が高い材料で形成されている。熱伝導率が高いため、第１・第２遮蔽部内での熱移動を促すことができ、第１・第２遮蔽部の温度を下げることができる。即ち、高温になりやすい第１・第２遮蔽部に熱が留まることを抑制することができる。 In the invention according to claim 2, the first and second shielding parts are formed of a material having a higher thermal conductivity than the general part of the case. Since the heat conductivity is high, heat transfer in the first and second shielding portions can be promoted, and the temperature of the first and second shielding portions can be lowered. That is, it is possible to suppress heat from staying in the first and second shielding portions that are likely to become high temperature.
　請求項３に係る発明では、第１・第２遮蔽部は、ケースの一般部よりも耐熱温度が高い材料で形成されている。高温になりやすい第１・第２遮蔽部に、耐熱温度が高い材料を用いることにより、熱に対する強度を高めることができる。 In the invention according to claim 3, the first and second shielding portions are formed of a material having a heat resistant temperature higher than that of the general portion of the case. By using a material having a high heat-resistant temperature for the first and second shielding parts that are likely to be high in temperature, the strength against heat can be increased.
　請求項４に係る発明では、第１・第２遮蔽部には、少なくとも外光が当たる部位に、外光の反射を弱める又は阻止する反射防止処理が施されている。第１・第２遮蔽部に当たった外光が第２凹面鏡へ戻る心配がなくなる。 In the invention according to claim 4, the first and second shielding portions are subjected to an antireflection treatment for weakening or blocking the reflection of the external light at least at the site where the external light hits. There is no fear that the external light hitting the first and second shielding parts will return to the second concave mirror.
　請求項５に係る発明では、ケースは、第１・第２凹面鏡を支えると共に第２遮蔽部を備えるセンターフレームと、このセンターフレームの上に取付けられ第１遮蔽部を備える上カバーと、センターフレームの下に取付けられる下カバーと、からなる。仮に、別々のカバーに第１凹面鏡と第２凹面鏡を取付けると、カバー個々の寸法誤差を見込んで光軸を調整する必要があり、この調整が面倒になる。本発明では、共通のセンターフレームに、第１凹面鏡と第２凹面鏡を取付けるため、第１凹面鏡と第２凹面鏡の光軸調整が容易になる。 In the invention according to claim 5, the case includes a center frame that supports the first and second concave mirrors and includes a second shielding portion, an upper cover that is mounted on the center frame and includes the first shielding portion, and a center frame. A lower cover, which is mounted underneath. If the first concave mirror and the second concave mirror are attached to separate covers, it is necessary to adjust the optical axis in consideration of the dimensional error of each cover, and this adjustment becomes troublesome. In the present invention, since the first concave mirror and the second concave mirror are attached to a common center frame, the optical axes of the first concave mirror and the second concave mirror can be easily adjusted.
　請求項６に係る発明では、センターフレームは金属成形品であり、下カバーは樹脂成形品であり、上カバーは樹脂成形品又は金属成形品である。金属成形品であれば剛性に富む。剛性に富むセンターフレームに第１・第２凹面鏡を取付けるため、光軸が良好に維持される。その上、金属成形品であれば、一般に樹脂成形品より耐熱温度が高く、熱伝導率も高い。 In the invention according to claim 6, the center frame is a metal molded product, the lower cover is a resin molded product, and the upper cover is a resin molded product or a metal molded product. If it is a metal molded product, it is rich in rigidity. Since the first and second concave mirrors are attached to the rigid center frame, the optical axis is well maintained. In addition, a metal molded product generally has a higher heat resistant temperature and higher thermal conductivity than a resin molded product.
　請求項７に係る発明では、金属成形品は、アルミニウムダイカスト品である。金属成形品は金属プレス品でもよいが、プレス品は形状を複雑にはできない。鋳造品であれば、複雑な形状にすることができるが、薄肉化が難しい。この点、ダイカスト品であれば、組織が緻密になり薄肉化が可能で、複雑な形状にも適している。その上、アルミニウムであれば、軽量であり、装置の軽量化が達成できる。 In the invention according to claim 7, the metal molded product is an aluminum die-cast product. The metal molded product may be a metal press product, but the shape of the press product cannot be complicated. If it is a cast product, it can be a complicated shape, but it is difficult to reduce the thickness. In this respect, die-cast products can be thinned and thinned, and are suitable for complex shapes. In addition, if aluminum, it is lightweight and the weight of the apparatus can be reduced.
　請求項８に係る発明では、樹脂成形品である第１遮蔽部の上面には、金属板が配置されている。第１遮蔽部は、ケース内へ向かう外光を遮断するための部位である。即ち、第１遮蔽部の上面には、外光が当たる。第１遮蔽部に当たる外光の一例として、太陽光が挙げられる。太陽光が当たる第１遮蔽部には、高い耐熱性が求められる。一方、ヘッドアップディスプレイ装置全体としては、軽量であることが望まれる。上カバーに用いられる樹脂は、金属板よりも密度が小さい（低い）。このため、上カバーを樹脂成形品とすることにより、ヘッドアップディスプレイ装置の軽量化を図ることができる。一方、金属板は上カバーに用いられる樹脂よりも耐熱温度（耐熱性）が高い。このため、太陽光が当たる第１遮蔽部の上面に金属板を配置することにより、耐熱性を高めることができる。即ち、ヘッドアップディスプレイ装置の軽量化を図りつつ、第１遮蔽部の耐熱性を高めることができる。 In the invention according to claim 8, a metal plate is disposed on the upper surface of the first shielding part which is a resin molded product. A 1st shielding part is a site | part for interrupting | blocking the external light which goes into a case. In other words, external light strikes the upper surface of the first shielding part. As an example of the external light hitting the first shielding part, sunlight is given. High heat resistance is calculated | required by the 1st shielding part which sunlight strikes. On the other hand, the overall head-up display device is desired to be lightweight. The resin used for the upper cover has a lower density (lower) than the metal plate. For this reason, the weight of the head-up display device can be reduced by using the upper cover as a resin molded product. On the other hand, the metal plate has a higher heat resistance temperature (heat resistance) than the resin used for the upper cover. For this reason, heat resistance can be improved by arrange | positioning a metal plate on the upper surface of the 1st shielding part which sunlight strikes. That is, it is possible to increase the heat resistance of the first shielding part while reducing the weight of the head-up display device.
第１改良装置の原理図である。It is a principle figure of a 1st improvement apparatus. 第２改良品、すなわち本発明に係るヘッドアップディスプレイ装置の基本構成図である。FIG. 3 is a basic configuration diagram of a second improved product, that is, a head-up display device according to the present invention. 本発明の実施例１に係るヘッドアップディスプレイ装置の分解図である。1 is an exploded view of a head-up display device according to Embodiment 1 of the present invention. 本発明の実施例１に係るヘッドアップディスプレイ装置の断面図である。It is sectional drawing of the head-up display apparatus which concerns on Example 1 of this invention. 第１・第２遮蔽部の遮蔽作用を説明する図である。It is a figure explaining the shielding effect of the 1st and 2nd shielding part. 第１・第２遮蔽部における熱の流れを説明する図である。It is a figure explaining the heat flow in the 1st, 2nd shielding part. センターフレームの変更例を説明する図である。It is a figure explaining the example of a change of a center frame. 本発明の実施例２に係るヘッドアップディスプレイ装置の断面図である。It is sectional drawing of the head-up display apparatus which concerns on Example 2 of this invention. 上カバーと金属板との分解斜視図である。It is a disassembled perspective view of an upper cover and a metal plate. 金属板の変更例を説明する図である。It is a figure explaining the example of a change of a metal plate.
　本発明の実施の形態を添付図に基づいて以下に説明する。
＜実施例１＞ Embodiments of the present invention will be described below with reference to the accompanying drawings.
<Example 1>
　図３に示すように、このヘッドアップディスプレイ装置１０では、ケース２０は、第１・第２凹面鏡１４、１６を支えると共に第２遮蔽部２４を備えるセンターフレーム３０と、このセンターフレーム３０の上に取付けられ第１遮蔽部２３を備える上カバー５０と、センターフレーム３０の下に取付けられる下カバー５５と、からなる。 As shown in FIG. 3, in the head-up display device 10, the case 20 includes a center frame 30 that supports the first and second concave mirrors 14 and 16 and includes a second shielding portion 24, and the center frame 30. The upper cover 50 is provided with the first shielding portion 23 attached thereto, and the lower cover 55 is attached under the center frame 30.
　センターフレーム３０は、取付けフランジ３１、３１を外周に備え、内部に斜め上に延びる第２遮蔽部２４を備えるアルミニウムダイカスト品である。 The center frame 30 is an aluminum die-cast product having mounting flanges 31 and 31 on the outer periphery and a second shielding part 24 extending obliquely upward inside.
　例えば、センターフレーム３０にステイ３２を溶接し、このステイ３２に接着層３３で第１凹面鏡１４を固定する。また、センターフレーム３０の内面に溶接されたステイ３４～３６に接着層３７～３９で第２凹面鏡１６を固定する。 For example, a stay 32 is welded to the center frame 30, and the first concave mirror 14 is fixed to the stay 32 with an adhesive layer 33. The second concave mirror 16 is fixed to the stays 34 to 36 welded to the inner surface of the center frame 30 with adhesive layers 37 to 39.
　センターフレーム３０の下部からステイ４１を延ばす。一方、光源１１と表示器１３を筒形ブラケット４２に嵌め、この筒形ブラケット４２から延ばしたブラケット片４３をステイ４１にビス４４、４４で固定する。 Extend the stay 41 from the bottom of the center frame 30. On the other hand, the light source 11 and the display device 13 are fitted to the cylindrical bracket 42, and the bracket piece 43 extending from the cylindrical bracket 42 is fixed to the stay 41 with screws 44 and 44.
　センターフレーム３０は、アルミニウムダイカスト品であれば、樹脂成形品より格段に強度が高く、剛性に富む。剛性に富むセンターフレーム３０に、第１・第２凹面鏡１４、１６や表示器１３を一括して取付けるため、これらの光軸調整が狂い難くなる。さらに、剛性に富むセンターフレーム３０は、取付けフランジ３１、３１で車両に取付けられる。カバーが全体的に樹脂で構成されている場合は、剛性が不足して光軸の再調整が必要になりうる。一方、実施例のヘッドアップディスプレイ装置１０は、剛性に富むためその心配が小さい。 If the center frame 30 is an aluminum die-cast product, the strength is much higher than that of a resin molded product, and the rigidity is high. Since the first and second concave mirrors 14 and 16 and the display 13 are collectively attached to the rigid center frame 30, it is difficult to adjust these optical axes. Furthermore, the rigid center frame 30 is attached to the vehicle by attachment flanges 31 and 31. If the cover is entirely made of resin, the rigidity may be insufficient and the optical axis may need to be readjusted. On the other hand, since the head-up display device 10 of the embodiment is rich in rigidity, the concern is small.
　上カバー５０は、例えば、ポリカーボネート成形品であり、上面にカバーガラス５１を備え、斜め下へ延びる第１遮蔽部２３を一体的に備えている。 The upper cover 50 is, for example, a polycarbonate molded product, and includes a cover glass 51 on the upper surface and integrally includes a first shielding portion 23 that extends obliquely downward.
　下カバー５５は、上に開口する有底筒体であり、例えば、ＡＢＳ樹脂成形品であり、プリント基板５６を内蔵している。 The lower cover 55 is a bottomed cylindrical body that opens upward, and is, for example, an ABS resin molded product and includes a printed circuit board 56.
　センターフレーム３０に、下からビス５７、５７で下カバー５５を取付け、上からビス５２で上カバー５０を取付ける。 The lower cover 55 is attached to the center frame 30 with screws 57 and 57 from below, and the upper cover 50 is attached with screws 52 from above.
　図４に示すヘッドアップディスプレイ装置１０が完成する。表示器１３から出射された表示光１２は第１凹面鏡１４で反射され、この第１凹面鏡１４で反射された表示光１５は、第１・第２遮蔽部２３、２４の間を通過して、第２凹面鏡１６に至る。第２凹面鏡１６で反射された表示光１７は上昇し、車両のフロントガラス６６（反射された表示光１７が投射される投射部６６）に至る。 The head-up display device 10 shown in FIG. 4 is completed. The display light 12 emitted from the display unit 13 is reflected by the first concave mirror 14, and the display light 15 reflected by the first concave mirror 14 passes between the first and second shielding parts 23 and 24, The second concave mirror 16 is reached. The display light 17 reflected by the second concave mirror 16 rises and reaches the vehicle windshield 66 (projection unit 66 on which the reflected display light 17 is projected).
　図５（ａ）に示すように、太陽５８の高度が低い場合、太陽光に代表される外光２５は、カバーガラス５１を通過し、第２凹面鏡１６で反射され、第１遮蔽部２３で遮蔽される。第１遮蔽部２３は、耐熱性に優れるポリカーボネートであるため、熱に対する強度が高い。 As shown in FIG. 5A, when the altitude of the sun 58 is low, the external light 25 represented by sunlight passes through the cover glass 51, is reflected by the second concave mirror 16, and is reflected by the first shielding unit 23. Shielded. Since the 1st shielding part 23 is a polycarbonate excellent in heat resistance, the intensity | strength with respect to a heat | fever is high.
　太陽５８の高度が高い場合、図５（ｂ）に示すように、外光２５は、カバーガラス５１を通過し、第２凹面鏡１６で反射され、第２遮蔽部２４で遮蔽される。第２遮蔽部２４は、耐熱性にさらに優れるアルミニウムであるため、熱に対する強度がさらに高い。 When the altitude of the sun 58 is high, the external light 25 passes through the cover glass 51, is reflected by the second concave mirror 16, and is shielded by the second shielding part 24, as shown in FIG. Since the 2nd shielding part 24 is aluminum which is further excellent in heat resistance, the intensity | strength with respect to heat is still higher.
　次に、熱伝導率について検討する。 Next, the thermal conductivity will be examined.
Figure JPOXMLDOC01-appb-T000002
Figure JPOXMLDOC01-appb-T000002
　ポリカーボネート（ＰＣ）樹脂は、熱伝導率が約０．２Ｗ／ｍ／Ｋである。一方、アルミニウムダイカスト品（ＡＤＣ１２）は、熱伝導率が約１００Ｗ／ｍ／Ｋである。 Polycarbonate (PC) resin has a thermal conductivity of about 0.2 W / m / K. On the other hand, the aluminum die-cast product (ADC12) has a thermal conductivity of about 100 W / m / K.
　図６（ａ）はごく簡単な伝熱モデルを説明する図であり、ポリカーボネート（ＰＣ）樹脂製の棒５９の一端が高温ｔ１ｐ、他端のｔ１ｐより低温ｔ２ｐ（ｔ２ｐは大気温度ｔ３より高い）で熱的に定常状態にあるとする。棒５９の外周が断熱されていると仮定すると、棒５９の内部を流れる熱Ｑ１ｐと、棒５９の他端から大気へ放出される熱Ｑ２ｐは等しくなる。ここで、棒の断面積は単位断面積（１．０）であれば、Ｑ１ｐは、熱伝導率λｐ×棒の長さ×（ｔ１ｐ－ｔ２ｐ）で算出される。また、Ｑ２ｐは熱伝達率ｃｐ×（ｔ２ｐ－ｔ３）で算出される。 FIG. 6A is a diagram for explaining a very simple heat transfer model, in which one end of a polycarbonate (PC) resin rod 59 has a high temperature t1p and a lower temperature t2p than the other end t1p (t2p is higher than the atmospheric temperature t3). Suppose that it is in a steady state thermally. Assuming that the outer periphery of the rod 59 is insulated, the heat Q1p flowing inside the rod 59 is equal to the heat Q2p released from the other end of the rod 59 to the atmosphere. Here, if the cross-sectional area of the bar is a unit cross-sectional area (1.0), Q1p is calculated by the following equation: thermal conductivity λp × bar length × (t1p−t2p). Q2p is calculated by the heat transfer coefficient cp × (t2p−t3).
　アルミニウムダイカスト品（ＡＤＣ１２）の棒５９の一端が高温ｔ１ａ、他端のｔ１ａより低温ｔ２ａ（ｔ２ａは大気温度ｔ３より高い）で熱的に定常状態にあるとする。棒５９の外周が断熱されていると仮定すると、棒５９の内部を流れる熱Ｑ１ａと、棒５９の他端から大気へ放出される熱Ｑ２ａは等しくなる。ここで、棒の断面積は単位断面積（１．０）であれば、Ｑ１ａは、熱伝導率λａ×棒の長さ×（ｔ１ａ－ｔ２ａ）で算出される。また、Ｑ２ａは熱伝達率ｃａ×（ｔ２ａ－ｔ３）で算出される。 It is assumed that one end of the rod 59 of the aluminum die-cast product (ADC12) is in a thermally steady state at a high temperature t1a and a temperature t2a lower than t1a at the other end (t2a is higher than the atmospheric temperature t3). Assuming that the outer periphery of the bar 59 is insulated, the heat Q1a flowing inside the bar 59 is equal to the heat Q2a released from the other end of the bar 59 to the atmosphere. Here, if the cross-sectional area of the bar is a unit cross-sectional area (1.0), Q1a is calculated as follows: thermal conductivity λa × bar length × (t1a−t2a). Q2a is calculated by the heat transfer coefficient ca × (t2a−t3).
　Ｑ１ｐ＝λｐ×棒の長さ×（ｔ１ｐ－ｔ２ｐ）と、Ｑ１ａ＝λａ×棒の長さ×（ｔ１ａ－ｔ２ａ）とにおいて、λｐは、λａの約１／５００であって、λａよりも格段に小さい。Ｑ１ｐ＜Ｑ１ａであるものの、その比は１：５００よりは格段に小さいと予想される。　λｐが極めて小さいため、傾向として（ｔ１ｐ－ｔ２ｐ）が格段に大きくなる。一方、λａが極めて大きくなるため、傾向として（ｔ１ａ－ｔ２ａ）が格段に小さくなる。 In Q1p = λp × bar length × (t1p−t2p) and Q1a = λa × bar length × (t1a−t2a), λp is about 1/500 of λa, which is much higher than λa. Small. Although Q1p <Q1a, the ratio is expected to be much smaller than 1: 500. Since λp is extremely small, (t1p−t2p) is remarkably large. On the other hand, since λa becomes extremely large, (t1a-t2a) is remarkably reduced as a tendency.
　また、Ｑ１ｐ＝Ｑ２ｐ、Ｑ１ａ＝Ｑ２ａであって、Ｑ１ｐ＜Ｑ１ａからＱ２ｐ＜Ｑ２ａとなる。Ｑ２ｐ＝ｃｐ×（ｔ２ｐ－ｔ３）と、Ｑ２ａ＝ｃａ×（ｔ２ａ－ｔ３）において、ｔ３は共通である。そして、ｃｐがｃａとほぼ等しいと仮定すると、ｔ２ｐ＜ｔ２ａとなる。 Q1p = Q2p, Q1a = Q2a, and Q1p <Q1a to Q2p <Q2a. In Q2p = cp × (t2p−t3) and Q2a = ca × (t2a−t3), t3 is common. Assuming that cp is substantially equal to ca, t2p <t2a.
　以上から、図６（ｂ）に示す温度曲線が得られ、ｔ１ｐがｔ１ａより格段に大きくなる。熱伝導率が大きいほど、第１・第２遮蔽部２３、２４の温度を早急に低くすることができる。温度が低いほど熱劣化が少なくなる。 From the above, the temperature curve shown in FIG. 6B is obtained, and t1p becomes much larger than t1a. The higher the thermal conductivity, the quicker the temperature of the first and second shielding parts 23, 24 can be lowered. The lower the temperature, the less thermal degradation.
　この知見から、第１遮蔽部２３も第２遮蔽部２４と同じアルミニウムダイカスト製、又は軽金属製であれば望ましい。 From this knowledge, it is desirable that the first shielding part 23 is also made of the same aluminum die cast as the second shielding part 24 or light metal.
　図７に示すように、第１遮蔽部２３に放熱フィン６１を一体形成したアルミニウムダイカスト品６３を予め製造し、このアルミニウムダイカスト品６３を成形用金型のキャビティに置き、キャビティへＰＣ樹脂６４を射出することで、いわゆるインサート成形が実施できる。 As shown in FIG. 7, an aluminum die-cast product 63 in which heat radiation fins 61 are integrally formed on the first shielding part 23 is manufactured in advance, and the aluminum die-cast product 63 is placed in a cavity of a molding die, and a PC resin 64 is placed in the cavity. By so-called injection, so-called insert molding can be performed.
　第１遮蔽部２３が外光２５で熱せられると、熱が、第１遮蔽部２３を伝わって、放熱フィン６１に至る。放熱フィン６１は放熱面積が大きいため、大気に向かって盛んに熱を放出する。 When the first shielding part 23 is heated by the external light 25, the heat is transmitted through the first shielding part 23 and reaches the radiation fin 61. Since the radiation fin 61 has a large heat radiation area, it actively releases heat toward the atmosphere.
　なお、上カバー５０の全部をアルミニウムダイカスト製、又は軽金属製にすることは差し支えない。
＜実施例２＞ The entire upper cover 50 may be made of aluminum die casting or light metal.
<Example 2>
　図８を参照する。次に、本発明の実施例２を図面に基づいて説明する。図８には、実施例２のヘッドアップディスプレイ装置の断面構成が示されている。図８は、上記図４に対応させて表している。 Refer to FIG. Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 8 shows a cross-sectional configuration of the head-up display device of the second embodiment. FIG. 8 is shown corresponding to FIG.
　実施例２によるヘッドアップディスプレイ装置１０Ａは、第１遮蔽部２３の上面に、金属板７１が配置されてなる。その他の基本的な構成については、実施例１によるヘッドアップディスプレイ装置１０（図４参照）と共通する。実施例１と共通する部分については、符号を流用すると共に、詳細な説明を省略する。 In the head-up display device 10A according to the second embodiment, a metal plate 71 is disposed on the upper surface of the first shielding part 23. Other basic configurations are the same as those of the head-up display device 10 according to the first embodiment (see FIG. 4). About the part which is common in Example 1, while using a code | symbol, detailed description is abbreviate | omitted.
　上カバー５０Ａは、樹脂成形品であり、例えば、ポリカーボネートとポリエチレンテレフタレート（ＰＥＴ）との混合樹脂材料を用いることができる。 The upper cover 50A is a resin molded product, and for example, a mixed resin material of polycarbonate and polyethylene terephthalate (PET) can be used.
　金属板７１の素材には、アルミニウムやアルミニウム合金を用いることができる。 Aluminum or aluminum alloy can be used for the material of the metal plate 71.
　なお、樹脂成形品の素材となる樹脂は、金属板７１に用いられる金属の密度よりも小さい。加えて、素材に用いられる樹脂の耐熱温度は、金属板７１に用いられる金属の耐熱温度よりも低い。即ち、金属板７１の耐熱温度は、樹脂の耐熱温度よりも高い。これらの条件を満たしていれば、樹脂や金属は、任意の素材を選択することができる。 The resin used as the material of the resin molded product is smaller than the density of the metal used for the metal plate 71. In addition, the heat resistance temperature of the resin used for the material is lower than the heat resistance temperature of the metal used for the metal plate 71. That is, the heat resistance temperature of the metal plate 71 is higher than the heat resistance temperature of the resin. If these conditions are satisfied, an arbitrary material can be selected as the resin or metal.
　図９を参照する。上カバー５０Ａには、３枚の金属板７１が貼り付けられている。金属板７１は、それぞれ、第１遮蔽部２３の上面、及び、この上面の左右の端部からそれぞれ前方に延びる上カバー５０Ａの左右の側面部内面に貼り付けられている。これらは、外部から視認可能な意匠面ということができる。即ち、金属板７１は、意匠面に配置されている。視認可能な部位に金属板７１が敷き詰められることにより、意匠性をより向上させることができる。 Refer to FIG. Three metal plates 71 are attached to the upper cover 50A. The metal plates 71 are respectively attached to the upper surface of the first shielding portion 23 and the inner surfaces of the left and right side surfaces of the upper cover 50A extending forward from the left and right ends of the upper surface. These can be referred to as design surfaces that are visible from the outside. That is, the metal plate 71 is disposed on the design surface. The design property can be further improved by spreading the metal plate 71 on the visible portion.
　なお、金属板７１は、両面テープによる貼り付け、接着剤による接着、ねじを用いたねじ止め、固定フックを用いた係止等、任意の方法によって上カバー５０Ａに配置することができる。 The metal plate 71 can be disposed on the upper cover 50A by an arbitrary method such as sticking with a double-sided tape, bonding with an adhesive, screwing with a screw, or locking with a fixing hook.
　以上をまとめて、以下のようにいうことができる。樹脂成形品である第１遮蔽部２３の上面には、金属板７１が配置されている。第１遮蔽部２３は、ケース２０Ａ内へ向かう外光を遮断するための部位である。即ち、第１遮蔽部２３の上面には、外光が当たる。第１遮蔽部２３に当たる外光の一例として、太陽光が挙げられる。太陽光が当たる第１遮蔽部２３には、高い耐熱性が求められる。一方、ヘッドアップディスプレイ装置１０Ａ全体としては、軽量であることが望まれる。上カバー５０Ａに用いられる樹脂は、金属板７１よりも密度が小さい（低い）。このため、上カバー５０Ａを樹脂成形品とすることにより、ヘッドアップディスプレイ装置１０Ａの軽量化を図ることができる。一方、金属板７１は上カバー５０Ａに用いられる樹脂よりも耐熱温度（耐熱性）が高い。このため、太陽光が当たる第１遮蔽部２３の上面に金属板７１を配置することにより、耐熱性を高めることができる。即ち、ヘッドアップディスプレイ装置１０Ａの軽量化を図りつつ、第１遮蔽部２３の耐熱性を高めることができる。 The above can be summarized as follows. A metal plate 71 is disposed on the upper surface of the first shielding part 23 that is a resin molded product. The 1st shielding part 23 is a site | part for interrupting the external light which goes into case 20A. That is, external light strikes the upper surface of the first shielding part 23. As an example of the external light hitting the first shielding part 23, sunlight is given. High heat resistance is required for the first shielding part 23 that is exposed to sunlight. On the other hand, the head-up display device 10A as a whole is desired to be lightweight. The resin used for the upper cover 50 </ b> A has a density smaller (lower) than that of the metal plate 71. For this reason, the weight of the head-up display device 10A can be reduced by using the upper cover 50A as a resin molded product. On the other hand, the metal plate 71 has a heat resistant temperature (heat resistance) higher than that of the resin used for the upper cover 50A. For this reason, heat resistance can be improved by arrange | positioning the metal plate 71 on the upper surface of the 1st shielding part 23 which sunlight strikes. That is, the heat resistance of the first shielding part 23 can be increased while reducing the weight of the head-up display device 10A.
　図１０を参照する。図１０には、金属板７１Ｂを変更したヘッドアップディスプレイ装置１０Ｂの変更例が示されている。即ち、金属板７１Ｂは、１枚板によって構成することもできる。この場合においても、本発明の所定の効果を得ることができる。また、１枚板によって構成した場合には、複数の板によって構成した場合に比べ、金属板同士の継ぎ目が存在しないため、意匠性をより高めることができる。 Refer to FIG. FIG. 10 shows a modified example of the head-up display device 10B in which the metal plate 71B is modified. That is, the metal plate 71B can be configured by a single plate. Even in this case, the predetermined effect of the present invention can be obtained. Moreover, when comprised by 1 sheet, since the seam of metal plates does not exist compared with the case where comprised by several board, designability can be improved more.
　尚、本発明のヘッドアップディスプレイ装置は、乗用車に好適であるが、一般の車両、船舶、航空機に適用することは差し支えない。即ち、本発明の作用及び効果を奏する限りにおいて、本発明は、実施例に限定されるものではない。 The head-up display device of the present invention is suitable for a passenger car, but may be applied to general vehicles, ships, and aircraft. That is, the present invention is not limited to the examples as long as the operations and effects of the present invention are exhibited.
　本発明のヘッドアップディスプレイ装置は、フロントガラスを備える車両に好適である。 The head-up display device of the present invention is suitable for a vehicle including a windshield.
　１０，１０Ａ，１０Ｂ…ヘッドアップディスプレイ装置
　１１…光源
　１２、１５…表示光
　１３…表示器
　１４…第１ミラー（第１凹面鏡）
　１６…第２ミラー（第２凹面鏡）
　２０，２０Ａ…ケース
　２２…クロス点
　２３…第１遮蔽部
　２４…第２遮蔽部
　２５…外光
　２６…一般部
　２７…反射防止処理膜
　３０…センターフレーム
　５０，５０Ａ…上カバー
　５５…下カバー
　７１，７１Ｂ…金属板 DESCRIPTION OF SYMBOLS 10, 10A, 10B ... Head-up display apparatus 11 ... Light source 12, 15 ... Display light 13 ... Display device 14 ... 1st mirror (1st concave mirror)
16 ... Second mirror (second concave mirror)
20, 20A ... Case 22 ... Cross point 23 ... First shielding part 24 ... Second shielding part 25 ... External light 26 ... General part 27 ... Antireflection treatment film 30 ... Center frame 50, 50A ... Upper cover 55 ... Lower cover 71 , 71B ... Metal plate

Claims (8)

  1. 　表示光を出射する表示器と、この表示器で出射された表示光を反射する第１ミラーと、この第１ミラーで反射された表示光を反射する第２ミラーと、前記表示器、前記第１・第２ミラーを収納するケースとを備えるヘッドアップディスプレイ装置において、
    　前記第１ミラーは、反射された表示光を前記第２ミラーに到達する前に上下でクロスさせる曲率を有した第１凹面鏡であり、
    　前記第２ミラーは、受けた表示光を反射する第２凹面鏡であり、
    　前記ケースは、前記第１・第２凹面鏡間の光路を挟むように、且つ前記クロスするクロス点の近傍まで延びる第１遮蔽部及び第２遮蔽部を備えており、
    　前記ケース外からケース内に侵入し前記第２凹面鏡で反射され前記第１凹面鏡に向かう外光を、前記第１・第２遮蔽部で遮蔽するようにしたことを特徴とするヘッドアップディスプレイ装置。     A display that emits display light; a first mirror that reflects display light emitted from the display; a second mirror that reflects display light reflected from the first mirror; the display; In a head-up display device comprising a case for housing a first mirror and a second mirror,
    The first mirror is a first concave mirror having a curvature that causes the reflected display light to cross up and down before reaching the second mirror;
    The second mirror is a second concave mirror that reflects the received display light;
    The case includes a first shielding part and a second shielding part extending so as to sandwich the optical path between the first and second concave mirrors and to the vicinity of the crossing point where the cloth crosses.
    A head-up display device characterized in that external light entering the case from outside the case, reflected by the second concave mirror and directed toward the first concave mirror is shielded by the first and second shielding portions.
  2. 　前記第１・第２遮蔽部は、前記ケースの一般部よりも熱伝導率が高い材料で形成されていることを特徴とする請求項１記載のヘッドアップディスプレイ装置。 2. The head-up display device according to claim 1, wherein the first and second shielding portions are made of a material having a higher thermal conductivity than a general portion of the case.
  3. 　前記第１・第２遮蔽部は、前記ケースの一般部よりも耐熱温度が高い材料で形成されていることを特徴とする請求項１記載のヘッドアップディスプレイ装置。 2. The head-up display device according to claim 1, wherein the first and second shielding parts are made of a material having a heat resistant temperature higher than that of the general part of the case.
  4. 　前記第１・第２遮蔽部には、少なくとも前記外光が当たる部位に、前記外光の反射を弱める又は阻止する反射防止処理が施されていることを特徴とする請求項１記載のヘッドアップディスプレイ装置。 2. The head-up according to claim 1, wherein the first and second shielding portions are subjected to an antireflection treatment for weakening or preventing the reflection of the external light at least at a site where the external light strikes. Display device.
  5. 　前記ケースは、前記第１・第２凹面鏡を支えると共に前記第２遮蔽部を備えるセンターフレームと、このセンターフレームの上に取付けられ前記第１遮蔽部を備える上カバーと、
    　前記センターフレームの下に取付けられる下カバーと、からなることを特徴とする請求項１記載のヘッドアップディスプレイ装置。     The case includes a center frame that supports the first and second concave mirrors and includes the second shielding part, and an upper cover that is mounted on the center frame and includes the first shielding part.
    The head-up display device according to claim 1, further comprising a lower cover attached under the center frame.
  6. 　前記センターフレームは金属成形品であり、前記下カバーは樹脂成形品であり、前記上カバーは樹脂成形品又は金属成形品であることを特徴とする請求項５記載のヘッドアップディスプレイ装置。 6. The head-up display device according to claim 5, wherein the center frame is a metal molded product, the lower cover is a resin molded product, and the upper cover is a resin molded product or a metal molded product.
  7. 　前記金属成形品は、アルミニウムダイカスト品であることを特徴とする請求項６記載のヘッドアップディスプレイ装置。 The head-up display device according to claim 6, wherein the metal molded product is an aluminum die-cast product.
  8. 　前記ケースは、前記第１・第２凹面鏡を支えると共に前記第２遮蔽部を備えるセンターフレームと、このセンターフレームの上に取付けられ前記第１遮蔽部を備える上カバーと、を有し、
    　前記上カバーは、樹脂成形品であり、
    　少なくとも前記第１遮蔽部の上面には、金属板が配置され、
    　前記樹脂成形品の素材に用いられる樹脂の密度は、前記金属板の密度よりも小さく、
    　前記金属板の耐熱温度は、前記樹脂の耐熱温度よりも高いことを特徴とする請求項１記載のヘッドアップディスプレイ装置。     The case includes a center frame that supports the first and second concave mirrors and includes the second shielding part, and an upper cover that is mounted on the center frame and includes the first shielding part.
    The upper cover is a resin molded product,
    A metal plate is disposed on at least the upper surface of the first shielding part,
    The density of the resin used for the material of the resin molded product is smaller than the density of the metal plate,
    The head-up display device according to claim 1, wherein a heat resistance temperature of the metal plate is higher than a heat resistance temperature of the resin.
PCT/JP2015/081683 2014-11-12 2015-11-11 Head up display device WO2016076342A1 (en)

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WO2017195740A1 (en) * 2016-05-09 2017-11-16 日本精機株式会社 Head-up display device
JP2018120029A (en) * 2017-01-23 2018-08-02 日本精機株式会社 Head-up display device

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WO2017195740A1 (en) * 2016-05-09 2017-11-16 日本精機株式会社 Head-up display device
JP2018120029A (en) * 2017-01-23 2018-08-02 日本精機株式会社 Head-up display device

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