Source: http://www.google.com/patents/US20030214733?dq=6,993,661
Timestamp: 2017-06-26 20:22:04
Document Index: 714403580

Matched Legal Cases: ['art 2', 'art 2', 'art 5', 'art 2', 'art 2', 'art 5', 'art 2', 'art 2', 'art 2', 'art 5', 'art 7', 'art 5', 'art 7', 'art 7', 'art 5', 'art 7', 'art 5', 'art 7', 'art 2', 'art 2', 'art 5', 'art 7', 'art 7', 'art 5', 'art 2', 'art 7', 'art 7', 'art 7', 'art 5', 'art 7', 'art 5', 'art 7', 'art 5', 'art 2', 'art 7', 'art 7', 'art 7', 'art 5', 'art 7', 'art 7', 'art 5', 'art 7', 'art 7', 'art 5', 'art 7', 'art 7', 'art 7', 'art 5', 'art 7', 'art 7', 'art 5', 'art 7', 'art 7', 'art 5', 'art 7', 'art 7', 'art 7', 'art 7', 'art 7', 'art 7', 'art 7', 'art 5', 'art 5', 'art 7', 'art 5', 'art 7', 'art 5', 'art 5', 'art 7', 'art 7', 'art 5', 'art 5', 'art 5', 'art 5', 'art 5', 'art 5', 'art 5', 'art 5', 'art 5', 'art 5', 'art 5', 'art 5', 'art 5', 'art 5', 'art 5', 'art 5', 'art 5', 'art 5', 'art 5']

Patent US20030214733 - Camera built-in type rearview mirror device - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsTo provide a camera built-in type rearview mirror device with illumination, wherein rigidity of the mirror housing can be raised, the camera main body part can photo a clear picture by extensive photographing feasible viewing angle through a transparent cover, and built-in of the camera module is simple....http://www.google.com/patents/US20030214733?utm_source=gb-gplus-sharePatent US20030214733 - Camera built-in type rearview mirror deviceAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS20030214733 A1Publication typeApplicationApplication numberUS 10/403,008Publication dateNov 20, 2003Filing dateApr 1, 2003Priority dateMay 14, 2002Also published asDE60301640D1, DE60301640T2, EP1362741A1, EP1362741B1, US6959994Publication number10403008, 403008, US 2003/0214733 A1, US 2003/214733 A1, US 20030214733 A1, US 20030214733A1, US 2003214733 A1, US 2003214733A1, US-A1-20030214733, US-A1-2003214733, US2003/0214733A1, US2003/214733A1, US20030214733 A1, US20030214733A1, US2003214733 A1, US2003214733A1InventorsYoshihiro Fujikawa, Yoshinori Hitomi, Hisaya Suzuki, Akiyoshi KobayashiOriginal AssigneeMurakami CorporationExport CitationBiBTeX, EndNote, RefManPatent Citations (15), Referenced by (86), Classifications (17), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetCamera built-in type rearview mirror device
PREFERRED EMBODIMENT OF THE INVENTION [0027] Hereafter, the embodiment of the camera built-in type rearview mirror device according to this invention will be explained in conjunction with the drawings. In the drawing to refer to, FIG. 1 is a perspective view showing a substantial structure of the inside when removing a mirror from the camera built-in type rearview mirror device according to one mode of the embodiment, FIG. 2 is a partially enlarged sectional view of the photographing window formed in the lower part of the mirror housing shown in FIG. 1 and near the concave part, and FIG. 3 is a front view of the transparent cover shown in FIG. 2 viewed from the lower part of the mirror housing. [0028] A camera built-in type rearview mirror device of one embodiment is constituted in such a way that as shown in FIG. 1, mirror housing 2 is rotated to mirror base 1 about a substantially perpendicular fulcrum axis by the drive of a motor (not shown) of electric retractable mirror 3, wherein the mirror base 1 is used by being fixed to the side door of a passenger seat side of a vehicle, which is not shown. [0029] Opening part 2A of the rear surface of the mirror housing 2 is equipped with an electric mirror which is not shown, so as to enable free right and left inclination or vertical inclination by the drive of the mirror surface adjusting unit 4. Camera module 5 for downward visual recognition to photo the road surface near the front wheel of a passenger seat side and its illumination light source 6, for example, are built in such mirror housing 2. In order to obtain the above constitution, photographing window 2B where lens 5B is faced and concave part 2C are formed adjacently in the lower part of the mirror housing 2 as shown in the enlarged view of FIG. 2. Wherein the lens 5B of wide angle is equipped in tip end of camera main body part 5A which is serving as the camera module 5, and concave part 2C is capable of accommodating the illumination light source 6. The concave part 2C is formed in the box type section, which opens toward a lower part. [0030] Thus, photographing window 2B with small opening area where lens 5B of the camera main body part 5A is faced, and concave part 2C of the box type section which can accommodate illumination light source 6 are formed as additional processing to mirror housing 2, so that camera module 5 and its illumination light source 6 are built in. The circumference of the photographing window 2B is reinforced by the cross-sectional box type form of concave part 2C. For this reason, in the mirror housing 2, twisting intensity is increased even though the photographing window 2B is opening. This allows no trembling vibration generated in an electric mirror (not shown) even when operational vibration is received from the body of a car. [0031] Here, as shown in FIG. 1 and FIG. 2, the lower part of the mirror housing 2 is equipped with transparent cover 7 for covering the photographing window 2B and concave part 2C. By the above, the surface form of the mirror housing 2 becomes the form having almost no unevenness, to thereby allow no generating of wind noises. Also, a rebound of the pebble and muddy water accompanying a traveling of a car is intercepted by the transparent cover 7. This prevents failure due to the breakage and corruption of lens 5B of the camera main body part 5A and each light emitting diode 6A of illumination light source 6. [0032] The transparent cover 7 is formed by bicolor molding wherein cover main part 7A facing with lens 5B of camera main body part 5A and each light emitting diode 6A of illumination light source 6 is fabricated by transparent resin, and frame part 7B surrounding the circumference of the cover main part 7A is fabricated by opaque black resin, for example. And shielding wall 7C for preventing the illumination light from each light emitting diode 6A, from turning in to lens 5B of the camera main body part 5A is fabricated integrally with the opaque frame part 7B. For this reason, at the time of a clouded sky, night or the like, when irradiating and photographing forwardly of lens 5B of the camera main body part 5A by illumination of each light emitting diode 6A, the camera main body part enables a clear picture with no white dotage to be photoed, and a dark portion also can be photoed. [0033] End face of frame part 7B of the portion for covering the concave part 2C and light shielding wall 7C is joined to junction end face of the concave part 2C of the mirror housing 2 through packing 8 as a seal member. And the camera main body part 5A is fixed to the end face of the frame part 7B of the portion that covers photographing window 2B, and shielding wall 7C through packing 9 as a seal member. That is, inside of cover main part 7A of the transparent cover 7 where lens 5B of the camera main body part 5A and each light emitting diode 6A of the illumination light source 6 face is intercepted from the exterior by packing 8 and packing 9. For this reason, even if dirt invades in the mirror housing 2 from the space between opening part 2A (see FIG. 1) of the mirror housing 2, and the circumferential edge of the electric mirror which is not shown or the like, such dirt does not adhere to the inside of cover main part 7A. The cover main part 7A is thus held clean. Consequently, each light emitting diode 6A can irradiate illumination light reliably through clean cover main part 7A, and the camera main body part 5A can photo a clear picture over a long period of time through the clean cover main part 7A. [0034] Here, the camera main body part 5A can be adapted so as to be sensitive to visible light and near-infrared-rays. In this case, as each light emitting diode 6A of the illumination light source 6, the infrared light emitting diode that emits light in near-infrared-rays is adopted. In the inside of cover main part 7A of the transparent cover 7 that faces each light emitting diode 6A, as shown in enlarged view of FIG. 2, infrared transmitting filter 10 is preferably stretched on. This infrared transmitting filter 10 is formed with a resin film, which does not transmit visible light but transmits the infrared rays containing near-infrared-rays. Coating of the multilayer film having such characteristic may be applied over a glass surface. [0035] By the above constitution, the camera main body part 5A can photo a clear picture by the illumination of the near-infrared-rays from an infrared light emitting diode even in the night or the like. Since illumination light is near-infrared-rays and it is not visible to people in that case, other drivers of vehicles or pedestrians cannot be confused. Moreover, since the illumination light source 6 inside concave part 2C cannot be seen from the outside through cover main part 7A of the transparent cover 7 with existence of the infrared transmitting filter 10 as shown in FIG. 3, the fine sight of camera built-in type rearview mirror device improves. [0036] Moreover, if the diffusion lens 11 that diffuses the illumination light from each light emitting diode 6A is formed inside the infrared transmitting filter 10 as shown in FIG. 2 in this case, the diffusion lens 11 diffuses the illumination light from each light emitting diode 6A. Therefore, the camera main body part can photo a bright picture by the diffused illumination light. In this case, the diffusion lens 11 does not appear through cover main part 7A of the transparent cover 7 by the infrared transmitting filter 10 of this side, and does not spoil appearance, either. [0037] Here, coating of the transparent conductive film composed of ITO (Indium Tin Oxide) which has heater function, which is not shown, and tin oxide or the like is applied inside of the cover main part 7A of the transparent cover 7 shown in FIG. 2, wherein lens 5B of the camera main body part 5A is faced at least. A pair of electrodes connected to the power supply, which is not shown through a pair of harness are being fixed to the transparent conductive film. Resistance of the transparent conductive film between the pair of electrodes is set as 40 ohms by adjusting composition and film thickness of the transparent conductive film. Then, if voltage 12V, such as an on-board battery, is impressed among the pair of these electrodes, current of 0.3A will flow on a transparent conductive film, to thereby constitute a heater with 3.6W. Inside of the cover main part 7A of the transparent cover 7 is thus heated. Accordingly, even under the weather conditions such that cloudy weather when dew condensation are prone to generate in the inside of cover main part 7A of the transparent cover 7, by electrically energizing a transparent conductive film, fogging and dew condensation are cleared away and the camera main body part 5A can photo a clear picture through the cover main part 7A of the transparent cover 7. [0038] In addition, as the transparent conductive film, as shown in FIG. 4, heating wire 14 is connected between the pair of electrodes 13 that is connected to the power supply, which is not shown, through a pair of harness 12. And in heat wire transparent film 15, the heating wire 14 can be drawn around substantially all over the film with meandering pattern. Also in this case, under the weather conditions such that cloudy weather and dew condensation are prone to generate in the inside of the cover main part 7A of the transparent cover 7, by electrically energizing the transparent conductive film, fogging and dew condensation are cleared away and the camera main body part 5A can photo a clear picture through the cover main part 7A of the transparent cover 7. [0039] Moreover, coating of the hydrophilic coating film, which is not shown, is applied over the external surface of the cover main part 7A of the transparent cover 7 as shown in FIG. 2. For this reason, even if water droplet adheres to the external surface of the cover main part 7A of the transparent cover 7, at the time of rainy weather, after car washing, or the like, it spreads in layer structure, without becoming lens-like form, when the hydrophilic film is used. Consequently, the camera main body part 5A can photo a clear picture through the cover main part 7A of the transparent cover 7. [0040] Here, in one mode of the camera built-in type rearview mirror device as shown in FIG. 5A, the cover main part 7A of the transparent cover 7 that faces with lens 5B of the camera main body part 5A is formed in flat. For this reason, in order to secure a photographing feasible viewing angle for the lens 5B of a wide angle to be capable of photographing, shown by the broken line, it is necessary to enlarge the cover main part 7A. That is, it is necessary to enlarge opening area of photographing window 2B. However, if opening area of the photographing window 2B is enlarged, the rigidity of the part and the mirror housing 2 falls. This is not preferable. [0041] Then, as shown in FIG. 5B as another embodiment, in the camera main body part 7A of the transparent cover 7 that faces with lens 5B of the camera main body part 5A, bulge part 7D having circular curved section is formed so that the lens 5B may rush in. If this bulge part 7D has too large amount of projection, it becomes a causative factor to generate wind noises at the time of a high-speed traveling of a car or a strong wind. Then, the amount of projection of the bulge part 7D is preferably set as about 5 mm 10 mm or less. [0042] Moreover, the outside form of the bulge part 7D has big influences on the wind noises at the time of a high-speed traveling of a car and a strong wind. Then, the outside form of the bulge part 7D is preferably set as a surface of a sphere or an ellipse surface of a sphere. For example, by forming in an ellipse surface of a sphere that is smooth in the longitudinal direction of car, a run wind comes to flow smoothly over the bulge part 7D of the cover main part 7A of the transparent cover 7 at the time of a high-speed traveling of a car and a strong wind. Wind noises are thus reduced. [0043] In another embodiment with above-described constitution, as shown in FIG. 5B, photographing feasible viewing angle which can photo the camera main body part 5A spreads as shown by the broken line, by rush in of lens 5B of the camera main body part 5A into the bulge part 7D. If put in another way, even when the opening area of the photographing window 2B is decreased, required photographing feasible viewing angle can be obtained, and the part and the opening area of the photographing window 2B is decreased accordingly compared with the example shown in FIG. 5A. Accordingly, the rigidity of the mirror housing 2 is raised further. Moreover, in the mirror housing 2, space-margin is obtained when lens 5B of the camera main body part 5A rushes into the bulge part 7D and the position of the camera main body part 5A moves to the transparent cover 7 side. [0044] Moreover, when the camera main body part 5A needs to be arranged near the split line of the mirror housing 2 which is formed of resin, by having the bulge part 7D in the cover main part 7A of the transparent cover 7 as shown in FIG. 5B, photographing feasible viewing angle obtained by the camera main body part 5A so as to be capable of photographing, is not narrowed by design surface, even if the design surface with curvature that changes a lot is formed near the split line of the mirror housing 2. Thus the camera main body part 5A is capable of photographing by required photographing feasible viewing angle. [0045] Here, the camera module 5 is formed in separable type wherein camera main body part 5A and picture signal-processing part 5D are connected through harness 5E. The camera main body part 5A has picture sensor 5C such as CCD (Charge Coupled Device) built in, for receiving light through the lens 5C. And the signal of the picture photoed by the camera main body part 5A is inputted in the picture signal-processing part 5D. The harness 5E is attached to the camera main body part 5A, and is connected to picture signal-processing part 5D through connector 5G of the tip. The length of this harness 5E is set as less than 10 cm so that degradation of a picture signal and mixing of noises which are outputted to picture signal-processing part 5D from the camera main body part 5A can be prevented as much as possible. [0046] The camera module 5 with the above constitution includes the electric storage unit 3 for rotating operation of the mirror housing 2 to the mirror base 1, and a restricted accommodation space where the mirror surface adjusting unit 4 for inclining operation of the electric mirror, the camera main body part 5A and picture signal-processing part 5D is accommodated in separable type of the camera main body part 5A and the picture signal processing part 5D. That is, the main body part of camera 5A is accommodated in the lower part of the mirror housing 2 with a downward posture having lens 5B faced near the photographing window 2B (see FIG. 2) of the mirror housing 2. The picture signal processing part 5D is separately accommodated in the upper part of the camera main body part 5A. And connector 5H of the end part of harness 5F which is connected to the picture signal processing part 5D is drawn in a vehicle compartment through the inside of the mirror base 1, to be connected to the power supply and monitor, which are not shown. Thus, the camera module 5 can display the picture photoed by the camera main body part 5A on the monitor. [0047] As described above, according to the invention as described in claim 1, an opening part to be formed adding to a mirror housing is satisfied with only the photographing window where the lens of the camera main body part is faced, to thereby decrease the opening area. In addition, since a concave part, which is arranged near the photographing window in the mirror housing and opens downwardly is formed, the vicinity area of the photographing window is reinforced according to the cross-sectional form of this concave part. Therefore, the rigidity of the mirror housing can be raised and trembling vibration of the mirror or the like can be prevented. [0048] According to the invention as described in claim 2, a transparent cover covers a photographing window and a concave part, obtaining a smooth form with almost no unevenness. Thus, wind noises can be prevented. Also, the transparent cover intercepts a rebound of the pebble and muddy water accompanying a traveling of a car. Thus failure due to the breakage and corruption of the camera main body part or an illumination light source can be prevented. Furthermore, inside of the transparent cover where a lens and an illumination light source of the camera main body part are arranged in a facing manner, is intercepted from the exterior by a seal member. Adhesion of dirt is thus prevented so as to be held clean. Consequently, the illumination light source can irradiate illumination light reliably through a clean transparent cover, and the camera main body part can photo a clear picture over a long period of time through a clean transparent cover. [0049] According to the invention as described in claim 3, photographing feasible viewing angle where the photography is possible spreads because the lens of the camera main body part rushes into a bulge part of a transparent cover. If put in another way, required photographing feasible viewing angle can be obtained even if the opening area of a photographing window is decreased. Accordingly, the rigidity of mirror housing can be raised further by decreasing the opening area of the photographing window more. In addition, since a run wind flows the external surface of a transparent cover smoothly in the external surface of the bulge part of the transparent cover, which is a smooth ellipse surface of a sphere for example at the time of a high-speed traveling and a strong wind, wind noises can be reduced. [0050] According to the invention as described in claim 4, by the illumination light from an illumination light source, photography of the camera main body part is achieved even in the night or the like. [0051] According to the invention as described in claim 5, a shielding wall prevents the illumination light from an illumination light source, from turning in to the lens of the camera main body part. The camera main body part does not have white dotage, and a clear picture of even a dark portion can be obtained. [0052] According to the invention as described in claim 6, since the illumination light from an illumination light source diffuses by a diffusion lens, photography of a bright picture of the camera main body part is achieved. In addition, when the diffusion lens is provided inside the infrared transmitting filter, a diffusion lens does not appear from the outside to thereby good-looking is achieved. [0053] According to the invention as described in claim 7, the camera main body part can photo a clear picture with illumination of near-infrared-rays even in the night and the like. Since illumination light is near-infrared-rays and it is not visible to people in that case, other drivers of vehicles or pedestrians cannot be confused. [0054] According to the invention as described in claim 8, since the illumination light source accommodated in a concave part by the infrared transmitting filter cannot be seen from the outside, the fine sight of camera built-in type rearview mirror device improves. [0055] According to the invention as described in claim 9, since the fogging of the inside of a transparent cover and dew condensation can be prevented by the heater function of a transparent conductive film or heat wire transparent film, the camera main body part can photo a clear picture through a transparent cover. [0056] According to the invention as described in claim 10, even when water droplet adheres to the external surface of a transparent cover, the water droplet spreads in layer structure, without becoming lens-like form when the hydrophilic coating film is used, at the time of rainy weather or after car washing, or the like. Thus the camera main body part can photo a clear picture through a transparent cover. [0057] According to the invention as described in claim 11, the camera main body part forming a camera module, and a picture signal-processing part are not integrally formed with a picture signal processing part, but are formed in separable type connected through harness. In the mirror housing with restricted accommodation space with a mirror surface adjusting actuator and a motor-driven containing unit accommodated therein like the motor-driven containing type mirror housing equipped with an electric mirror, a picture signal-processing part is easily accommodated together with the camera main body part. 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