JP2000321670A - Advertisement device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a outdoor projector advertisement device having high reliability by solving the three problems associated with the projector of a double housing structure used outdoors for a long period of time, i.e., the deterioration of projected images and the degradation in the reliability of functions occur as a result of insufficient ventilation and the temperature elevation in the housings, the lighting defect of a projection lamp, etc., occur at the time of low temperature in winter or in a cold season and the distortion of the images arises in the case the installation of the projector on the central line a screen is infeasible. SOLUTION: This outdoor type projector advertisement device is provided with an intake port 12 and two air exits in a second housing 11 housing the projector 1. One thereof is provided with a fan 24 for discharging the air in the second housing to the outside. Another one is provided with a ventilation duct 15 directly connecting to the ventilation fan in the lamp chamber of the projector to constitute the structure to discharge the hot air to the outside via an air tunnel 20. In addition, the bottom of the first housing 10 of the projector is provided with a hot plate heater 9 and the device has means for turning on the hot plate heater before lighting of the projector and turning off the heater after the lighting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an advertisement apparatus for transmitting information to an unspecified number of people using a projector.

[0002]

2. Description of the Related Art Signboards and electronic bulletin boards are generally known as devices for transmitting information to an unspecified number of people in a public plaza. In these devices, there is a problem that replacement of transmission information requires a large cost, and image display requires advanced technology, resulting in an increase in the price of the device. On the other hand, Japanese Patent Application Laid-Open No. Hei 10-206971 discloses a technology of an advertising device using a slide projector having a double housing structure. In this advertising device, it is easy to replace outgoing images, attention by switching images,
It solves some problems such as the price of the equipment.

[0003]

However, when the advertisement apparatus disclosed in Japanese Patent Application Laid-Open No. H10-206991 is actually used, the first problem is that the heat generated from the light source lamp of the projector is large, The warm air exhausted by the fan from the lamp chamber of the housing is returned to the second housing, and the warm air flows again into the inlet of the first housing. The temperature of the housing has risen, causing problems such as quick deterioration of the slide and damage to the performance of the liquid crystal image. Also, Japanese Patent Application Laid-Open
The second problem disclosed in -206971 is that the operating temperature environment of a general projector is indoor use.
+ 5 ° C to 35 ° C. Discharge-type lamps such as xenon lamps have the characteristics that the brightness gradually decreases and the lighting temperature gradually increases from the initial stage of use. But things do not happen. When this is used as a double housing structure at night in winter, the temperature environment becomes minus temperature, and the projector may not light up due to the characteristics of the lamp. Also, JP-A-10-20697
The third problem disclosed in (1) is that the method of correcting image distortion when the projector cannot be placed on the center line of the screen has a problem that the structure is complicated and the price of the apparatus is increased. When a projector is used as an advertising device, it may not be possible to install the projector on the center line of the screen due to the installation location. It is a common experience that the projected image will be distorted if the projection center angle is not perpendicular to the screen. The present invention provides a projected image with less distortion by a simple method, utilizing the characteristics of a case where a projector is used with an advertising device. The present invention provides a slide projector, a liquid crystal projector having a double-housing structure, in which a projected image is deteriorated due to temperature when used outdoors for a long period of time, and a lighting failure at a low temperature, and a projected image due to a projector installation position. An object of the present invention is to provide a projector advertisement apparatus that can solve distortion and operate unattended.

[0004]

Means for Solving the Problems, Embodiments of the Invention, and Effects of the Invention Deterioration of the projected image due to temperature rise in the housing of the projector used outdoors, deterioration of the reliability of the projector device, distortion of the projected image In order to solve the problem of (1), the advertising device of the present invention forms a first housing forming the exterior of the projector and a second housing for housing the same, and the inside of the first housing is mainly a lighting control block and a projection block. , A light-emitting lamp chamber, and an optical block. A ventilation fan is attached to the upper part of the light-emitting lamp chamber, and a projection image is set between the condenser lens and the projection lens of the optical block. The second housing has an air intake port in the lower part, a projection port of a glass window on the front side surface, and an upper surface which is connected to the housing by a truncated number as an opening / closing lid. Air outlets, one of which is equipped with a fan for exhausting the air in the second housing, and the other of which is connected to a ventilation fan mounted above the light-emitting lamp room of the projector And the ventilation duct which can expand and contract vertically is attached. A roof panel is attached around the upper lid using an insect screen as a spacer, and the space serves as a wind tunnel for exhaust, and the exhaust is configured to flow to the outside air through the insect screen. In this configuration, when the power of the projector is turned on, the projector starts operating, the ventilation fan in the lamp room and the exhaust fan in the second housing start rotating,
Part of the air that has entered through the inlet of the second housing passes through the inside of the first housing from the inlet of the first housing, is discharged to the outside through a ventilation duct and an exhaust air tunnel, and passes through the inside of the first housing. Cooling. Another part of the air entering from the inlet of the second housing passes through the outer periphery of the first housing, cools the outside of the first housing, and is cooled by the fan attached to the upper lid of the second housing. Exhausted to the outside through the wind tunnel. According to the above configuration, the effect of increasing the temperature due to the recirculation of the air heated in the lamp chamber is eliminated, the cooling function of the projector can be maintained, and functional failure due to temperature is eliminated. The second problem that the lamp does not light at low temperatures is that the temperature inside the second housing may be raised by a heater. The problem that dew condensation occurs inside occurs. Therefore, as in this embodiment, a hot plate heater is mounted on the bottom plate of the first housing, and the heater is turned on several hours before the light of the projector is turned on by a timer, and turned off after the light is turned on. With this configuration, when the heater is turned on, the bottom plate of the first housing is heated, and the internal components are gradually warmed by the rising air current, and the problem of lighting failure without dew condensation is solved. Regarding the third problem related to image distortion due to the projection angle, the vertical and horizontal expansion and contraction distortion ratios are the ratio of the distance from the projector projection lens to the upper and lower sides of the quadrilateral screen, and the distance to the left and right sides. It is almost proportional to the ratio. On the other hand, when the projector is used as an advertising device, even if the projector cannot be installed on the center line of the screen due to the location, the distance to the lower side of the upper side and the left side of the right side is set to a fixed value because the setting positions are individually fixed. . In this case, if the projected image is produced in inverse proportion to the up / down / left / right expansion / contraction ratio, the projected image is free from distortion. The expansion and contraction of the projection image can be freely set by using separately manufactured computer expansion and contraction software. As described above, the present invention solves the problems of temperature rise in the housing when the projector is used as a double-housing structure, poor lighting at low temperatures when used outdoors, and image distortion due to the projection angle. And a highly reliable projector advertisement device is provided.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to clarify an embodiment of the present invention, an embodiment of the present invention will be described below with reference to the drawings. The embodiments of the present invention are not limited to the following examples,
It goes without saying that the present invention can be implemented in various modes as long as it belongs to the technical scope of the present invention. The advertising device according to the first embodiment of the present invention is one in which the slide projector 1 externally mounted on the first housing 10 is housed in the second housing 11 shown in the front view of FIG. 1 and the side view of FIG. The slide projector 1 includes an electric control block 2 for controlling projection lamp lighting, motor driving, and the like, a projection block 3 for inserting and removing a slide 8 which is a projection image set between the projection lens 6 and the condenser lens, and a projection. An optical block 27 composed of a lamp, a lens, and the like, and a slide tray 7 for storing slides are set on the upper part. A ventilation fan 5 according to the present invention is attached to the upper part of the lamp chamber 4 of the optical block, and a ventilation inlet (not shown) is opened at the bottom of the first housing 10. Slide projector 1
Is a box body having an opening / closing lid 25 at the top, an air intake port 12 at the bottom, a projection port 13 of a glass window on the front side, and an upper surface of the opening / closing lid is made of an insect repellent mesh. Reference numeral 19 denotes a double structure of the upper panel 14 and the roof panel 21, and the space forms an exhaust wind tunnel 20.
The upper plate 14 of the opening / closing lid is provided with two exhaust ports, one of which is a ventilation fan 24 for exhausting air in the second housing, and the other is an exhaust port of a lamp chamber in the first housing. , And a ventilation duct 15 which is vertically expandable and contractible is dropped into an exhaust port thereof, and is configured so as to ride on the exhaust port of the first housing. The reason that the exhaust duct is configured to be able to expand and contract is that when installing this projector,
The projector may be tilted to fit the projected image to the screen. Also in this case, the exhaust duct is brought into close contact with the exhaust fan 5 of the first housing. In the present embodiment, the two exhaust ports are opened on the upper plate for rain protection, but they may be provided on the side of the first housing. A hot plate heater 9 is mounted near an intake port (not shown) at the bottom of the first housing, and a timer (not shown) is provided to raise the temperature inside the first housing before the projector is turned on at low temperatures in winter.
Is configured to be turned on and off. On the side surface inside the second housing, control devices 26 such as a power timer for turning on and off the projector, a lamp, a heater on / off control timer, and an interval timer for controlling a projection interval of a projection image are attached. . In this configuration, when the power of the projector is turned on by a timer or the like, the electric and mechanical parts are driven, and the ventilation fan 5 of the first housing and the exhaust fan 24 of the second housing are activated.
Exhausts the intake air from the intake port 12 to the outside through the wind tunnel 20. Next, when the lighting switch of the lamp is turned on by a timer or the like, the projected image is projected on the screen. When the lamp is turned on, a large amount of heat is generated, but the two fans ventilate the inside and outside air of the first housing to the outside, and warm air from the first housing flows back through the second housing. And the cooling function of the projector is maintained. Next, the problem of distortion of the projected image will be described with reference to the embodiments shown in FIGS. 3, 4, 5, and 6. FIG. When the projector of the present invention is intended to project an outdoor side wall or the like as a screen, there are cases where the projector 28 cannot be installed on the center line of the screen due to the installation location. Fig. 3 shows the projector
9 is a view in which an image is slightly upwardly projected on a screen 30 such as a building side wall, which is installed on a building 9. A projection image 8 such as a slide film is set between a condenser lens (not shown) and a projection lens 6 in the projector. When a rectangular projection image is projected upward, the screen is distorted into a trapezoid having a long upper side as shown in FIG. Similarly, when projected from the right toward the screen, the projected image is distorted into a long trapezoid on the left side as shown in FIG. At this time, if the distance 31 from the projection lens 6 of the projector 28 to the upper side of the screen is a, the distance 32 to the lower side is b, the length 33 of the upper side of the trapezoid is A, and the length 34 of the lower side is B, the distortion rate is: a / b = A / B. Similarly, when the distance to the right side is d and the distance to the left side is c (not shown) when the projector is installed on the right side of the screen, the length of the right side of the projected image as shown in FIG. 36
Where D is the length of the left side and C is the length of the left side, and the distortion rate in the left-right direction has a relationship of d / c = D / C. Therefore, if the relationship between the position of the projector and the position of the screen is known in advance, the distortion of the projected image will be eliminated if the projected image is produced so as to correct the distortion according to the relationship of the distortion rate. FIG. 6 is an embodiment of a projected image of the slide projector, in which 37 is a positive film having a sprocket 38, and 39 is a projection screen frame in which
Projected image 40 distorted vertically according to the above relational expression
Is produced, and the space between the projection screen frame 39 and the projection image 40 is painted black so that light does not pass through. When this is projected on the screen, a rectangular image without distortion is projected on the screen. To produce this distorted image 40,
For example, after creating a normal image on a personal computer, stretch it vertically and horizontally using image stretching software, print it out with a color printer, and then copy it to a positive film with a camera. You.

[Brief description of the drawings]

FIG. 1 is an external front view of a slide projector according to a first embodiment of the present invention.

FIG. 2 is an external side view of the slide projector according to the first embodiment of the present invention.

FIG. 3 is a diagram illustrating an example of a device arrangement when the image is projected by the slide projector advertisement device according to the first embodiment of the present invention.

FIG. 4 is an example of a distorted image projected when projected upward by the slide projector advertisement apparatus according to the first embodiment of the present invention.

FIG. 5 is an example of a distorted image projected when the slide projector advertisement device according to the first embodiment of the present invention projects diagonally in the horizontal direction in a normal shape.

FIG. 6 is an example of a projected image in which the image distortion has been corrected when the slide projector advertisement apparatus according to the first embodiment of the present invention cannot be installed on the center line of the screen.

[Explanation of symbols]

1. Projector 2. Electric control block 3.
Projection block 4. Lamp room 5. Ventilation fan 6.
Projection lens 7. Slide tray 8. Projection image 9.
Hot plate 10, first housing 11, second housing 12
・ Air inlet 13 ・ Projection window 14 ・ Top plate 15
・ Ventilation duct 16 ・ Air flow 1 17 ・ Air flow 2 18
・ Air flow 3 19 ・ Spacer (insect repellent net) 20 ・ Wind tunnel 21
・ Roofing plate 22 ・ Exhaust port 1 23 ・ Exhaust port 2 24 ・ Ventilation fan 25 ・ Opening / closing lid 26 ・ Control device 27 ・ Optical block 28 ・ Slide projector advertising device 29 ・ Prop 30 ・ Screen 31 ・ Top side distance a 32 ・ Bottom side distance b 33, projection screen 33, upper side A 34, lower side B 35, left side C 36, right side D 37, slide 38, sprocket 39, projection screen frame 40, projection image

Claims (4)

[Claims] A first housing housing an optical mechanism therein for projecting a projection film or a liquid crystal image prepared as an advertisement information medium onto a screen via a projection lens provided on a side surface of the first housing; An advertising device using a projector, forming a second housing that stores the projector to protect it from the outside world,
The lower part of the second housing has an air intake, the upper part has two exhaust ports, one of which has a fan for forced exhaust, and the other one has an exhaust port. A projector advertisement, comprising: a ventilation duct connected to an exhaust fan of a projector lamp room attached to the first housing; and means for automatically turning on / off a power supply of the projector at a predetermined time. apparatus. 2. A projector having a first housing containing an optical mechanism therein, and projecting a projection film or a liquid crystal image created as an advertising information medium onto a screen via a projection lens provided on a side surface of the housing. An advertising device using the same, forming a second housing for housing the projector to protect it from the outside world, a roof plate is attached to the upper part of the second housing via a spacer, and the roof plate and the second A wind tunnel space leading to the outside is formed between the two housings.The lower part of the second housing has an air intake port, the upper part has two exhaust ports, one of which is for forced exhaust. The other exhaust port is connected to the wind tunnel space between the exhaust fan of the projector lamp room attached to the first housing and the roof plate. A projector advertising device, comprising: a ventilation duct that extends through a wall; and means for automatically turning on / off a power supply of the projector at a predetermined time. 3. The advertising device according to claim 1, wherein a heater is turned on before the projector is turned on, and a hot plate heater that is turned off after the projector is turned on is attached to a lower portion of the first housing. The projector advertisement device according to claim 1 or 2, wherein 4. A ratio of a distortion amount in a vertical direction and a horizontal direction of a quadrilateral projection film or a liquid crystal image used in the advertising device according to claim 1 or 2, is determined by a projection lens. The projected image is created by being distorted so as to be almost inversely proportional to the distance to the upper side and the lower side, the distance to the left side and the right side of the screen of the screen.