Image projection device and method for controlling air-filter
An image display device, air filter technology, applied in membrane filters, chemical instruments and methods, separation methods, etc., can solve the problems of difficult filter parts judgment, coiling, change, etc.
Active Publication Date: 2011-11-16
PANASONIC CORP
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[0005] However, in the case of using numerical values related to the flow of air such as air volume, wind speed, and fan speed as a method of detecting contamination of the filter member, it cannot cope with changes in the surrounding environment that affect the air flow.
Especially, when the projector is installed in a place with low air pressure, since the air volume or wind speed decreases regardless of the pollution of the filter parts, there is a problem that wind blowing occurs even if the pollution of the filter parts does not reach the prescribed condition. Take the issue of roll filter
In addition, as factors affecting the flow of air passing through the filter member, in addition to the air pressure, it is also related to the presence or absence of a shield near the opening of the projector, the temperature and humidity inside and outside the projector, and the like. method, it is difficult to correctly judge the contamination of filter parts
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[0020] Regarding the basic configuration and functions of the projection type image display device in the embodiment of the present invention, use Figure 1 to Figure 3 Be explained. figure 1 It is a perspective view showing the appearance of a projection type image display device (hereinafter, simply referred to as "this device") 1 in an embodiment of the present invention, figure 2 It is a perspective view showing the internal main configuration and arrangement of the device 1, image 3 It is an enlarged plan view showing a part of the device 1 in detail.
[0021] This device 1 accommodates a projection-type projector unit (not shown in the figure: hereinafter, simply referred to as "projector") inside a casing 2. As shown in the figure), the projection window 5 of the projector is arranged on the front panel 3, the air vent 6 is arranged on the side part, and the feet 7 are arranged on the bottom part. The projector can project an image with a specified size and a speci...
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The present invention provides an image projection device and a method for controlling air-filter. The image projection device includes a replaceable air filter placed near an opening of a housing, a switcher for switching step by step a working area of the air filter, an air-speed meter for detecting a pollution level of the air filter, and a controller for controlling the switcher. When the air-speed meter detects that the pollution level of the air filter reaches a given threshold, the controller prompts the switcher to switch the working area of the air filter, and then detects a pollution level of the air filter after the switchover for determining whether or not the working area before the switchover needs to be switched.
Description
technical field [0001] The present invention relates to a projection type image display device equipped with an air filter, and more particularly, to a multipurpose and high-function projection type image display device and an air filter control method that can be used in an environment with severe dust conditions. Background technique [0002] In recent years, with the popularization of projection-type image display devices (hereinafter also referred to as "projectors"), in addition to the existing applications used in relatively clean environments such as corporate conference rooms, indoor and outdoor Instances of use in various places are also becoming common. When the range of use places is expanded, conditions such as temperature, humidity, and air cleanliness become strict due to the diversification of use environments. Therefore, along with the expansion of applications, new issues arise regarding the quality of projectors. [0003] In particular, when used in an en...
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IPC IPC(8): G03B21/14G03B21/16G03B21/00B01D50/00
CPCB01D2279/45G03B21/16B01D46/10B01D46/008B01D46/88
Inventor 中岛嘉信野元守山本政也
Owner PANASONIC CORP