JP2009206951A - 3-ccd camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that the convection of a fan is diffused and air is not efficiently blown to the radiation fin of a solid-state image sensing device while conventionally the fan is disposed near the solid-state image sensing device inside a camera, relating to the heat radiation structure of a television camera. <P>SOLUTION: By mounting the fan mounted on the side of the radiation fin of the solid-state image sensing device inside a case having a leading blade for directly blowing air to respective channels R, G and B, the heat radiation structure for improving the cooling efficiency of the respective channels R, G and B of the solid-state image sensing device is attained. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a three-plate camera, and more particularly to a cooling structure for a three-plate camera.

The cooling structure of a solid-state imaging device such as a CCD (Charge Coupled Device) of a conventional three-plate camera has a fan on both sides of the radiating fin provided on the solid-state imaging device, and is used for blowing and sucking the radiating fin. Two fans were used.
Alternatively, one fan is arranged on one side and used for blowing or sucking.

A cooling structure of a conventional three-plate camera will be described with reference to FIGS. In the drawings of the conventional example and the embodiment, components having common functions are denoted by the same reference numerals to avoid duplication of explanation, and description thereof will be omitted as much as possible.
FIG. 6 is a perspective view showing the appearance of a conventional three-plate camera. 60 is a three-panel camera, 61 is a top frame, 62 is a rear panel, 63 is a right side cover, 69 is a heat dissipation fin for electronic components, 71 is a panel portion for connection terminals, and 81 is a slit hole provided in the right side cover 63. , 82 are slit holes provided in the rear panel 62. 7 is a diagram in which the side covers on both sides of the three-plate camera 60 of FIG. 6 are removed, 64 is a left side cover, 11B is a heat radiation fin of a Bch solid-state image sensor, and 11G is a heat radiation of a Gch solid-state image sensor. Fins, 11R are radiating fins of the Rch solid-state imaging device, 67 is a blowing fan, 83 is a slit hole provided in the left side cover 64, and 84 is an opening provided in the right side cover 63. 8 is a perspective view in which the side covers 63 and 64 on both sides of the three-plate camera 60 of FIG. 6 and the top frame 61 are removed. 65 is a front panel, 66 is a bottom frame, and 68 is an electronic component section. . FIG. 9 is a side view of the three-plate camera 60 in the state of FIG. 8 as viewed from the right side. Reference numeral 72 denotes a lens mount, and reference numeral 73 denotes a three-color separation prism.
6 to 9, the fan 67 sucks the air in the three-plate camera 60 into the inside through the slit hole 81 of the right side cover 63, and blows cooling air to the radiation fins provided in the heat generating portion. In the three-plate camera 60, when air is blown inside, warm air is exhausted to the outside through the slit hole 83, the slit hole 82, and the like of the left side cover 64. The inside of the three-plate camera 60 is cooled by such an air flow.

JP 2006-295855 A

In the above-described conventional technology, even if the fan wind (air) is allowed to pass through the radiating fin of a solid-state imaging device such as a CCD, the positional relationship between the R, G, and B channels (Rch, Gch, Bch) is separated. Therefore, the G channel can be cooled when placed next to the center of the optical axis of the camera, but the fan (air) does not flow much in the R channel and the B channel, and the fan convection diffuses and cools. ineffective. This is the same not only when one fan is used, but also when two fans are provided on both sides (for example, one for blowing and the other for discharging). In addition, when two fans are used, the cost and power consumption increase, which is a problem.
Similarly, even when a fan that is arranged at the top and sucks air in the downward direction and exhausts it in the lateral direction as in Patent Document 1, it is difficult to cool the solid-state imaging devices of all the channels equally. It was.
In view of the above problems, an object of the present invention is to provide a three-plate camera having a structure for efficiently and evenly cooling a solid-state imaging device such as a CCD of a three-plate camera that generates local heat.

In order to achieve the above object, the three-plate camera according to the present invention uses a fan, which is mounted on a case having a guide blade that blows air directly on each of the R, G, and B channels. The cooling fins are arranged on the right side or the left side of each cooling fin.
That is, the three-plate camera according to the present invention is a three-plate camera having a solid-state image sensor, wherein the solid-state image sensor is provided with heat radiation fins and the outside air is sucked into the heat-radiation fins. A fan for outputting, a fan case and a fan cover for housing the fan, and a guide means provided in the fan case for guiding the output wind of the fan to each of the radiating fins.
Preferably, in the three-plate camera according to the invention, the guide means includes a guide hole of the fan case and a fin cover that covers the radiating fin, corresponding to each of the solid-state imaging devices.

  According to the present invention, the cooling efficiency of each of the R, G, and B channels of the solid-state imaging device can be improved. Further, by suppressing the local heat generation of the solid-state image sensor, it is possible to minimize the load on the solid-state image sensor and to cool it.

  An embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a view showing a front panel portion, a solid-state imaging device and its peripheral portion of a three-plate camera according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1 is a fan, 2 is a fan case which accommodates the fan 1, 3 is a fan cover which covers the fan case 2, 4B is a radiation fin provided in the B-channel solid-state image sensor, 4G is provided in the G-channel solid-state image sensor The heat radiation fins 4R are heat radiation fins provided on the R-channel solid-state imaging device, 5G is a fin cover that covers the G-channel heat radiation fins 4G, and 8G is the fan 1 through the opening of the fin cover 5G provided on the fan case 2. 8B is a guide hole for blowing the output wind of the fan 1 from the opening of the fin cover 5B (not shown) provided in the fan case 2, and 8R is shown in the fan case 2. Guide holes for blowing the output wind of the fan 1 from the opening of the fin cover 5R not to be operated, 11 is a front panel, 3-color separation prism, 13 denotes an opening provided in the fan cover 3. In FIG. 1, the fin cover 5B of the B-channel heat radiation fin 4B and the heat radiation cover 5R of the R-channel heat radiation fin 4R are not shown. Hereinafter, the present invention will be described by using the fin cover 5G as a representative. The solid-state imaging device is, for example, a CCD (Charge Coupled Device).

In FIG. 1, fin covers 5B, 5G, and 5R cover the radiating fins 4B, 4G, and 4R, and an opening through which air enters and exits on the fan 1 side and the opposite side of the fin cover 5G is provided.
Further, the fan case 2 is provided with an opening 13 for sucking in cooling air from the outside, and coincides with the opening on the fan 1 side of each fin cover (for example, the fin cover 5G). As shown, guide holes 8B, 8G, and 8R are provided.

With this configuration, for example, cooling air for the guide holes 8G of the fan case 2 is output from the respective openings on the fan 1 side of the fin cover 5G, and heat is taken away from each of the radiating fins 4B, 4G, and 4R. It is discharged to the outside of the three-plate camera through the opening of the fin cover opposite to the fan 1. At this time, it is guided to the fin cover 5G, covers the fin 4G, and the air from the fan 1 does not flow elsewhere in the opening on the opposite side, but all flows away from the heat of the fins of the radiating fin 4G. The same applies to the other radiating fins 4B and 4R.
In this way, the fan case 2 and the fin cover all output air from the fan 1 is output from the guide holes of the fan case 2, and further, through the openings of the fin covers 5B, 5G, and 5R, the radiation fins 4B, It is guided until it flows into 4G and 4R and is output (exhaust) from the opening in the opposite direction of the fin covers 5B, 5G, and 5R.
In the above-described embodiment, a guide blade shape such as a nozzle or a guide partition plate is provided at the cooling air outlet on the fan 1 side, and the cooling air is directly applied to the radiating fins 4B, 4G, and 4R. You may do it.

An embodiment of the present invention will be further described with reference to FIGS. FIG. 2 is a diagram in which the fan 1, the fan case 2, the fan cover 3, the radiating fins 4B, 4G, and 4R and the fin covers 5B, 5G, and 5R are removed from the drawing of FIG. 6B is a B-channel solid-state imaging device, 6G is a G-channel solid-state imaging device, 6R is an R-channel solid-state imaging device, 7B is a sensor substrate of the solid-state imaging device 6B, 7G is a sensor substrate of the solid-state imaging device 6G, and 7R is a solid-state image sensor. This is a sensor substrate of the image sensor 6R.
In FIG. 2, the heat generation of the solid-state imaging devices 6B, 6G, and 6R is caused by the holes provided in the center portions of the sensor substrates 7B, 7G, and 7R attached to the solid-state imaging devices 6B, 6G, and 6R, respectively. Thermal conduction is performed to the radiation fins 4B, 4G, and 4R that are in contact with the back surfaces of the solid-state imaging devices 6B, 6G, and 6R, respectively.

  As in the embodiment according to FIGS. 1 and 2, the heat conducted to the radiating fins 4B, 4G, and 4R is respectively transferred to the radiating fins 4B, 4G, and 4R. 4, the fan 1 is mounted inside, the fan case 2 and the fan cover 3 are mounted, and the outside air sucked by the fan 1 from the opening 13 of the fan cover 3 is discharged from the outlet of the fan case 2. Almost all of the heat radiation fins 4B, 4G, and 4R can be sent through the openings.

The overall configuration of the three-plate camera according to one embodiment of the present invention described with reference to FIGS. 1 and 2 will be described with reference to FIGS. FIG. 3 is a perspective view of the embodiment of the three-plate camera of the present invention with the top frame and side panels on both sides removed. Reference numeral 10 denotes a three-plate camera, 14 denotes an electronic component section, 15 denotes a heat radiation fin of the electronic component 14, 16 denotes a bottom frame, 17 denotes a rear panel, and 18 denotes a lens mount. FIG. 4 is a plan view of the embodiment of the three-plate camera according to the present invention as viewed from above with the top frame removed. Further, the fin cover (for example, the fin cover 5G) is removed. 19 is a right side cover and 20 is a left side cover. FIG. 5 is a side view of the three-panel camera 10 in the state of FIG. 3 as viewed from the right side.
FIG. 3 is substantially the same as FIG. 8 of the conventional example except for the explanations in FIG. 1 and FIG.

Note that the fan case 2 has heat radiation fins 4B, 4G, and 4R so as to efficiently cool only the heat radiation fins 4B, 4G, and 4R of the solid-state imaging devices 6B, 6G, and 6R of B, G, and R, respectively. It has a duct shape for guiding to 4R, a nozzle shape, or a guide blade shape such as a partition plate for guide.
Furthermore, a fin cover (for example, a fin cover 5G) is attached so that the outside air sent out from the fan case 2 flows all through the radiating fins 4B, 4G, and 4R.
Therefore, as in the above embodiment, the cooling air introduced from the outside blown by the fan is provided so as to have at least one outlet configuration of a duct shape, a nozzle shape, or a guide blade shape, and an output from the fan. The fan case is hermetically sealed so that the wind is output only to the outlet, and by providing the output wind from the outlet directly against the cooling fin for the solid-state imaging device, the heat radiating fin 4B is used by the cooling air. Since each of 4G and 4R is efficiently cooled, it is possible to suppress the temperature rise of the solid-state imaging devices 6B, 6G, and 6R.

The figure for demonstrating one Example of this invention. The figure for demonstrating one Example of this invention. The figure for demonstrating one Example of this invention. The figure for demonstrating one Example of this invention. The figure for demonstrating one Example of this invention. The perspective view which shows the external appearance of the conventional three plate type camera. The figure which removed the housing | casing board of the both sides of the three-panel type camera of FIG. The perspective view which removed the side cover and top frame of the both sides of the three-plate type camera of FIG. The side view which looked at the three-plate-type camera 60 of the state of FIG. 8 from the right side.

Explanation of symbols

  1: Fan, 2: Fan case, 3: Fan cover, 4B, 4G, 4R: Radiation fin, 5G: Fin cover, 6B, 6G, 6R: Solid-state imaging device, 7B, 7G, 7R: Sensor substrate, 8B, 8G , 8R: guide hole, 10: three-plate camera, 11: front panel, 11B, 11G, 11R: radiating fin, 12: three-color separation prism, 13: opening, 14: electronic component, 15: radiating fin, 16 : Bottom frame, 17: Rear panel, 18: Lens mount, 19: Right side cover, 20: Left side cover, 60: Three-panel camera, 61: Top frame, 62: Rear panel, 63: Right side cover, 64: Left side Cover, 65: Front panel, 66: Bottom frame, 67: Fan for spraying, 68: Electric Component portion, 69: heat radiation fin, 71: panel connection terminal, 72: lens mount, 73: three-color separation prism, 81: slit, 82: slit, 83: slit, 84: opening.

Claims (1)

  In a three-plate camera having a solid-state image sensor, a radiation fin provided in each of the solid-state image sensor, a fan that sucks air from outside and outputs the air to each of the radiation fins, and the fan are housed 3. A three-plate camera comprising a fan case and a fan cover, and guide means provided in the fan case for guiding the fan output air to each of the heat radiating fins.

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