JP2008076863A - Projector, program, and information recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector capable of cooling that matches the height of the installed projector without being affected by surrounding environment, and to provide a program and an information recording medium. <P>SOLUTION: The projector 100 comprises: a fan 110; a measuring section 130 that measures a quantity of current of air sent by the fan 110; a driving section 120 that drives the fan 110 at a fixed driving voltage; a storage section 140 that stores conversion data 142 representing an interrelation between the quantity of current of air and the height; a determining section 150 that obtains a height based on the quantity of current of air and the conversion data 142 and determines whether the height is equal to or greater than a first reference value or not; and a control section 160 that exerts highland control if the height is equal to or greater than the first reference value and exerts lowland control if the height is lower than the first reference value. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a projector, a program, and an information storage medium.

  Even when the cooling fan built in the projector is driven, the air volume of the cooling fan varies depending on the altitude where the projector is installed. For this reason, depending on the altitude, an appropriate cooling effect may not be obtained with normal settings. Therefore, the projector needs to perform cooling control in accordance with the altitude.

  Conventionally, information related to elevation has been manually input to the projector by the user. For example, Japanese Patent Application Laid-Open No. 2004-157356 describes that an image for selecting one elevation from three types of lowland, standard, and highland is displayed, and projector cooling control is performed according to the selection of elevation. Yes.

  However, such work is time-consuming work for the user and it is difficult for the user to determine the altitude.

Further, for example, Japanese Patent Application Laid-Open No. 2005-70514 describes that a temperature gradient within a predetermined time in a projector is calculated and projector cooling control is performed based on the temperature gradient.
JP 2004-157356 A JP-A-2005-70514

  However, since the temperature gradient inside the projector is affected by the temperature around the projector, it is difficult to appropriately control the cooling of the projector with the method disclosed in Japanese Patent Laid-Open No. 2005-70514.

  An object of the present invention is to provide a projector, a program, and an information storage medium that can perform cooling according to the installed altitude without being affected by the surrounding environment.

In order to solve the above problems, a projector according to the present invention provides:
With fans,
A measurement unit for measuring the air volume of the fan;
A driving unit for driving the fan with a constant driving voltage;
A storage unit for storing conversion data indicating a relationship between the air volume and the altitude;
A determination unit that determines an altitude based on the air volume and the conversion data, and determines whether the altitude is equal to or higher than a first reference value;
A control unit that performs high altitude control when the altitude is equal to or higher than a first reference value, and performs low altitude control when the altitude is less than the first reference value;
It is characterized by including.

The program according to the present invention is
A computer having a projector having a fan, a measuring unit that measures the air volume of the fan, a driving unit that drives the fan, and a storage unit that stores conversion data indicating the relationship between the air volume and altitude.
A determination unit that determines an altitude based on the air volume and the conversion data, and determines whether the altitude is equal to or higher than a first reference value;
The drive unit is controlled so as to drive the fan with a constant voltage, and the high altitude control is performed when the altitude is equal to or higher than a first reference value, and when the altitude is lower than the first reference value, It is made to function as a control part which controls.

The information storage medium according to the present invention is
Computer readable by a projector having a fan, a measurement unit that measures the air volume of the fan, a drive unit that drives the fan, and a storage unit that stores conversion data indicating the relationship between the air volume and altitude An information storage medium storing a program,
The program is stored.

  According to the present invention, for example, a projector or the like measures the air volume by driving a fan with a constant drive voltage at the time of starting or the like, and converts the air volume into an altitude so that it is not affected by the surrounding environment. Cooling control according to the installed altitude can be performed.

The projector includes a display unit,
The determination unit determines whether the altitude is equal to or higher than a second reference value larger than the first reference value,
The display unit may display a warning when the altitude is equal to or higher than a second reference value.

  Accordingly, the projector or the like can display a warning that the altitude is too high to be used, and the user can grasp that the projector cannot be used by the warning display.

  Hereinafter, an example in which the present invention is applied to a projector will be described with reference to the drawings. In addition, the Example shown below does not limit the content of the invention described in the claim at all. In addition, all of the configurations shown in the following embodiments are not necessarily essential as means for solving the problems described in the claims.

  FIG. 1 is a functional block diagram of a projector 100 in the present embodiment.

  The projector 100 includes a fan 110, a measurement unit 130 that measures the air volume of the fan 110, a drive unit 120 that drives the fan 110 with a constant drive voltage, a storage unit 140, a determination unit 150 that performs various determinations, A control unit 160 that performs various controls, a cooling unit 170, and a display unit 180 are included. The projector 100 includes general configurations such as an image processing unit and a projection unit.

  The storage unit 140 also includes conversion data 142 indicating the relationship between the air volume of the fan 110 and the altitude at the installation point of the projector 100, reference value data 144 indicating a reference value for determination by the determination unit 150, and measurement by the measurement unit 130. Measurement data 146 indicating the value is stored.

  Here, the conversion data 142 and the reference value data 144 will be described in more detail.

  FIG. 2 is a diagram illustrating an example of the conversion data 142 in the present embodiment.

  The conversion data 142 is data indicating the relationship between the air volume of the fan 110 and the altitude at the installation location of the projector 100 as shown in FIG. For example, when the air volume is 10, the altitude is 1000 m, and when the air volume is 5, the altitude is 3000 m. Thus, generally, the air volume of the fan 110 decreases as the altitude at the installation point of the projector 100 increases.

  The conversion data 142 may be in a table format in which the air volume and the altitude are associated with each other, or may be in a function format that derives the altitude from the air volume. Note that the data indicating the association between the air volume and the altitude may be obtained by experiments, for example. Further, the air volume may be a value such as 10 or a value indicating the wind speed such as a meter per second.

  Next, the reference value data 144 will be described.

  FIG. 3 is a diagram illustrating an example of the reference value data 144 in the present embodiment.

  The reference value data 144 is data indicating a reference value for the determination unit 150 to perform determination. For example, in the example shown in FIG. 3, the first reference value for determining whether the altitude is low or high is 1000 (m), and the second reference for determining whether the altitude is unusable by the projector 100. The value is 3000 (m).

  The determination unit 150 may have a first reference value and a second reference value as a determination algorithm. In this case, the reference value data 144 is not necessary.

  Further, as the hardware of the drive unit 120 and the like, for example, the following may be employed. For example, the drive unit 120 is a drive circuit, the measurement unit 130 is an anemometer, the storage unit 140 is ROM, RAM, the determination unit 150, the control unit 160 is a CPU, the display unit 180 is an LED, A cooling fan or the like may be employed as the cooling unit 170. The fan 110 may be the cooling fan of the cooling unit 170 or may be a dedicated fan different from the cooling fan.

  Further, the projector 100 may read from the information storage medium 200 a program for causing a computer included in the projector 100 to function as the control unit 160 or the like.

  Further, as such an information storage medium 200, for example, a CD-ROM, DVD-ROM, ROM, RAM, HDD or the like can be applied, and the program reading method is a contact method or a non-contact method. May be.

  Next, the procedure of the cooling determination process based on the measurement data 146 will be described.

  FIG. 4 is a flowchart showing the flow of the cooling determination process in the present embodiment.

  When the start button of the projector 100 is pressed, the control unit 160 controls the drive unit 120 to drive the fan 110 with a constant voltage (for example, 8V).

  The drive unit 120 drives the fan 110 with a constant drive voltage (step S1).

  The measurement unit 130 measures the air volume of the fan 110 (step S2) and stores it in the storage unit 140 as measurement data 146.

  The determination unit 150 converts the measurement value included in the measurement data 146 into an altitude based on the conversion data 142 (step S3).

  And the determination part 150 determines whether the said altitude is more than a 1st reference value based on the reference value data 144 (step S4). For example, if the altitude is 1000 m, it is equal to or more than the first reference value, and if the altitude is 500 m, it is less than the first reference value.

  When the altitude is less than the first reference value, the control unit 160 sets the cooling control to low ground (normal) (step S6), normally starts the projector 100, and sets the cooling unit 170 according to the low ground setting. Control (step S9).

  On the other hand, when the altitude is equal to or higher than the first reference value, the determination unit 150 determines whether the altitude is equal to or higher than the second reference value based on the reference value data 144 (step S5). For example, if the altitude is 3000 m, it is equal to or greater than the second reference value, and if the altitude is 1500 m, it is less than the second reference value.

  When the altitude is not less than the first reference value and less than the second reference value, the control unit 160 sets the cooling control for high altitude (step S7), and the display unit 180 displays that the high altitude cooling control is performed. (Step S8). In addition, as a method for displaying that the highland cooling control is performed, for example, a method of lighting an LED indicating that the highland cooling control is performed, a method of projecting an image indicating that the highland cooling control is performed, or the like is adopted. May be.

  Then, the control unit 160 normally starts up the projector 100 and controls the cooling unit 170 according to the setting for high altitude (step S9).

  On the other hand, when the altitude is equal to or higher than the second reference value, the display unit 180 displays a warning indicating that the projector 100 cannot be used by turning on or blinking an LED indicating that the projector 100 cannot be used (step S10).

  When the altitude is equal to or higher than the second reference value, the projector 100 stops starting.

  In addition, when the above cooling determination process is complete | finished, the control part 160 may control the drive part 120 so that the drive of the fan 110 may be stopped, and when the fan 110 is a cooling fan, conditions, such as temperature. The drive unit 120 may be controlled so as to be driven according to the above.

  As described above, according to the present embodiment, for example, the projector 100 measures the air volume by driving the fan 110 with a constant drive voltage at the time of startup or the like, and converts the air volume into the altitude, thereby Cooling according to the installed altitude can be performed without being affected by the environment.

  Further, according to the present embodiment, since the user does not need to judge the altitude or set the cooling control by himself, the projector 100 can reduce the user's trouble and improve usability. it can.

  Further, according to the present embodiment, the projector 100 can display a warning that the usage point of the projector 100 is too high to be used, and the user can grasp that the projector 100 cannot be used by the warning display. can do.

  In addition, application of this invention is not limited to the Example mentioned above, A various deformation | transformation is possible.

  For example, the determination unit 150 may use GPS (Global Positioning System) together when determining the altitude.

  In addition, the determination unit 150 may perform determination using more reference values such as lowland, standard, and highland instead of the lowland and highland classifications, and the control unit 160 performs control according to more classifications. May be performed.

  When the projector 100 has a sound output unit, the control unit 160 outputs a warning sound indicating that it cannot be used instead of the display by the display unit 180 to the sound output unit or performs high altitude control. A sound indicating this may be output to the sound output unit.

  The value indicating the height is not limited to the altitude, and any value indicating the height can be adopted.

  As the projector 100, various projectors can be employed. For example, a liquid crystal projector, a CRT (Cathode Ray Tube) projector, a projector using an organic EL (Electro Luminescence), a DMD (Texas Instruments Inc.) It is possible to adopt a projector using a digital micromirror device.

It is a functional block diagram of the projector in a present Example. It is a figure which shows an example of the conversion data in a present Example. It is a figure which shows an example of the reference value data in a present Example. It is a flowchart which shows the flow of the cooling determination process in a present Example.

Explanation of symbols

  100 projector, 110 fan, 120 drive unit, 130 measurement unit, 140 storage unit, 142 conversion data, 144 reference value data, 146 measurement data, 150 determination unit, 160 control unit, 170 cooling unit, 180 display unit, 200 information storage Medium

Claims (4)

With fans,
A measurement unit for measuring the air volume of the fan;
A driving unit for driving the fan with a constant driving voltage;
A storage unit for storing conversion data indicating a relationship between the air volume and the altitude;
A determination unit that determines an altitude based on the air volume and the conversion data, and determines whether the altitude is equal to or higher than a first reference value;
A control unit that performs high altitude control when the altitude is equal to or higher than a first reference value, and performs low altitude control when the altitude is less than the first reference value;
Including a projector. The projector according to claim 1, wherein
Including display,
The determination unit determines whether the altitude is equal to or higher than a second reference value larger than the first reference value,
The display unit displays a warning when the altitude is equal to or higher than a second reference value. A computer having a projector having a fan, a measuring unit that measures the air volume of the fan, a driving unit that drives the fan, and a storage unit that stores conversion data indicating the relationship between the air volume and altitude.
A determination unit that determines an altitude based on the air volume and the conversion data, and determines whether the altitude is equal to or higher than a first reference value;
The drive unit is controlled so as to drive the fan with a constant voltage, and the high altitude control is performed when the altitude is equal to or higher than a first reference value, and when the altitude is lower than the first reference value, A program that functions as a control unit that performs control. Computer readable by a projector having a fan, a measurement unit that measures the air volume of the fan, a drive unit that drives the fan, and a storage unit that stores conversion data indicating the relationship between the air volume and altitude An information storage medium storing a program,
An information storage medium storing the program according to claim 3.

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