JP2016143930A - Projection type image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projection type image display device capable of announcing an abnormal state on a projection screen even in occurrence of a failure in a cooling part.SOLUTION: The projection type image display device comprises: a light source; a light source driving part for driving the light source; a cooling part for cooling each part; a cooling control part for controlling the cooling part; an image forming part for forming a projection image by converting light from the light source; a light source output setting part for setting the light emission level of the light source; and a cooling part failure detection part for detecting a failure in the cooling part. When a fault occurs in the cooling part, the light source output setting part turns on the light source at a light emission level lower than that in a normal use state and announces the abnormal state on the projection screen by the image forming part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a projection type image display apparatus, and more particularly to a method for lighting a light source when an abnormality occurs in a cooling unit of the apparatus.

  The projection-type image display device displays an image with light from a light source. In general, when the light source is turned on, the light source itself and components on the optical path are heated to be cooled by the cooling unit. Thus, when the cooling unit fails, the light source is turned off to prevent the internal temperature from rising. The user is notified of the abnormal state with the light source turned off.

  As an example of the above operation, Patent Document 1 discloses a technique in which when a cooling fan fails, the light source is turned off and an abnormal state is notified.

JP 2009-47966

  However, in the prior art, the light source is turned off when the cooling unit fails, so the abnormality notification method is limited to LED blinking, command transmission to the management PC, and the like. With these notification methods, it is difficult for the user who is present to determine in which state the failure has occurred.

  Accordingly, an object of the present invention is to provide a projection type image display apparatus that can notify an abnormal state on a projection screen even in a state where a cooling unit has failed.

  In order to achieve the above object, a projection-type image display device of the present invention includes a light source, a light source driving unit that drives the light source, a cooling unit that cools each unit, a cooling control unit that controls the cooling unit, An image forming unit that converts light of the light source to form a projection image, a light source output setting unit that sets a light emission level of the light source, and a cooling unit failure detection unit that detects a failure of the cooling unit, and a light source output setting unit Is characterized in that when the cooling unit fails, the light emission level of the light source is turned on at a level lower than the normal use state, and an abnormal state is notified on the projection screen by the image forming unit.

  According to the present invention, it is possible to provide a projection type image display apparatus that can notify an abnormal state on a projection screen even when a cooling unit is out of order.

Configuration diagram of projector 1 Operation flow 1 when the cooling unit is abnormal Operation flow 2 when the cooling unit is abnormal

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[Example 1]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows the configuration of a projector 1 (projection type image display device) according to an embodiment of the present invention. The light source unit 10 emits light according to the power supplied from the light source driving unit 11. Furthermore, it has a light source 1 and a light source 2, and the light source 1 and the light source 2 are different types of light sources. For example, the light source 1 is a laser, and the light source 2 is an LED. The light source driving unit 11 supplies the power set by the light source output setting unit 15 to the light source unit 10. The cooling unit 12 includes a fan 1 that cools the light source 1 and a fan 2 that cools the light source 2, and cools each unit according to the setting of the cooling control unit 13. The cooling control unit 13 controls the cooling unit 12.

  The image forming unit 14 converts light from the light source unit 10 and displays an image on the projection screen. The light source output setting unit 15 controls the light source driving unit 11 and sets the light emission level of the light source unit 10. The cooling unit failure detection unit 16 detects a failure state of the cooling unit 12. The temperature sensor unit 17 measures the temperature of an arbitrary location inside the projector 1. The temperature threshold recording unit 18 records a temperature threshold at an arbitrary location inside the projector 1. When an abnormal state occurs in the projector 1, the abnormal state notification unit 19 communicates with the external management PC 20 to notify the abnormal state. The management PC 20 manages the projector 1.

  Next, the operation flow of the projector 1 in the first embodiment will be described with reference to FIG. When the projector 1 receives the light source lighting command, the operation flow of this embodiment is started. In step 101, the cooling control unit 13 activates the cooling unit 12 to start cooling each unit. In step 102, the cooling unit failure detection unit 16 confirms the failure state of the cooling unit 12. If the cooling unit 12 is operating normally, the process proceeds to step 103, and if the cooling unit 12 is out of order, the process proceeds to step 104. In step 103, a normal image display operation is performed, and the routine proceeds to step 102.

  In step 104, the light source output setting unit 15 sets the light emission level of the light source unit 10 to the off state, turns off the light source unit 10, and proceeds to step 105. In step 105, the cooling control unit 13 stops the cooling unit 12, and the process proceeds to step 106. In step 106, the failure state of the cooling unit 12 detected by the cooling unit failure detection unit 16 is notified to the management PC 20 by the abnormal state notification unit 19, and the process proceeds to step 107. In step 107, the internal temperature of the apparatus measured by the temperature sensor unit 17 is compared with the temperature threshold value recorded in the temperature threshold value recording unit 18.

  If the internal temperature is higher than the temperature threshold, step 107 is executed again, and if the internal temperature is lower than the temperature threshold, the process proceeds to step 108. In step 108, the light source output setting unit 15 sets a light emission level that does not require cooling, and the light source driving unit 11 turns on the light source 1 at the set light emission level, and the process proceeds to step 109. At this time, the light source 2 is kept off. In step 109, the light from the light source unit 10 is converted by the image forming unit 14, and the projection screen displays that the cooling unit 12 has failed, and the process proceeds to step 110. In step 110, it is confirmed whether or not there is an instruction to turn off the light source.

  In step 111, the time since execution of step 109 is counted, and it is confirmed whether an arbitrary time has elapsed. If the arbitrary time has not elapsed, the process proceeds to step 110, and if it has elapsed, the process proceeds to step 112. To do. In step 112, the light source output setting unit 15 sets the light emission level of the light source unit 10 to the extinguished state, turns off the light source unit 10, and ends the process.

  Although it is possible to implement the present invention by the above operation flow, even if the light source output setting unit 15 is changed to an operation of lighting all the light sources of the light source unit 10 at a light emission level that does not require cooling in step 108 It is possible to implement the present invention.

[Example 2]
Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows the configuration of a projector 1 (projection type image display device) according to an embodiment of the present invention. The light source unit 10 emits light according to the power supplied from the light source driving unit 11. Furthermore, it has a light source 1 and a light source 2, and the light source 1 and the light source 2 are different types of light sources. For example, the light source 1 is a laser, and the light source 2 is an LED. The light source driving unit 11 supplies the power set by the light source output setting unit 15 to the light source unit 10. The cooling unit 12 includes a fan 1 that cools the light source 1 and a fan 2 that cools the light source 2, and cools each unit according to the setting of the cooling control unit 13. The cooling control unit 13 controls the cooling unit 12.

  The image forming unit 14 converts light from the light source unit 10 and displays an image on the projection screen. The light source output setting unit 15 controls the light source driving unit 11 and sets the light emission level of the light source unit 10. The cooling unit failure detection unit 16 detects a failure state of the cooling unit 12. The temperature sensor unit 17 measures the temperature of an arbitrary location inside the projector 1. The temperature threshold recording unit 18 records a temperature threshold at an arbitrary location inside the projector 1. When an abnormal state occurs in the projector 1, the abnormal state notification unit 19 communicates with the external management PC 20 to notify the abnormal state. The management PC 20 manages the projector 1.

  Next, an operation flow of the projector 1 in the second embodiment will be described with reference to FIG. When the projector 1 receives the light source lighting command, the operation flow of this embodiment is started. In step 201, the cooling control unit 13 activates the cooling unit 12 to start cooling each unit. In step 202, the failure state of the cooling unit 12 is confirmed by the cooling unit failure detection unit 16. If the cooling unit 12 is operating normally, the process proceeds to step 203. If the cooling unit 12 has failed, the process proceeds to step 204. In step 203, a normal image display operation is performed, and the routine proceeds to step 202. In step 204, the light source output setting unit 15 sets the light emission level of the light source unit 10 to the off state, turns off the light source unit 10, and proceeds to step 205.

  In step 205, the cooling control unit 13 stops the cooling unit 12, and the process proceeds to step 206. In step 206, the abnormal state notification unit 19 notifies the management PC 20 of the failure state of the cooling unit 12 detected by the cooling unit failure detection unit 16, and the process proceeds to step 207. In step 207, the cooling control unit 13 activates fans other than the failed part of the cooling unit 12 detected by the cooling unit failure detection unit 16. In step 208, the light source output setting unit 15 prohibits lighting of the light source unit 10 for a predetermined time. In Step 209, the light source output setting unit 15 sets the light emission level of the light source unit 10 based on the information on the failed part of the cooling unit 12 detected by the cooling unit failure detection unit 16, and turns on the light source unit 10.

  For example, if the fan 1 is out of order, the light source 1 remains off and the light source 2 lights up with the light emission level lower than normal. In step 210, the light from the light source unit 10 is converted by the image forming unit 14, and the projection screen displays that the cooling unit 12 has failed, and the process proceeds to step 211. In step 211, it is confirmed whether or not there is an instruction to turn off the light source. If not, the process proceeds to step 212. If there is, the process proceeds to step 213. In step 212, the time since execution of step 210 is counted, and whether or not an arbitrary time has elapsed is confirmed. If the arbitrary time has not elapsed, the process proceeds to step 211, and if it has elapsed, the process proceeds to step 213. To do. In step 213, the light source output setting unit 15 sets the light emission level of the light source unit 10 to the off state, and the light source unit 10 is turned off and the process ends.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

1 projector, 10 light source unit, 11 light source drive unit, 12 cooling unit, 13 cooling control unit,
14 Image forming unit, 15 Light source output setting unit, 16 Cooling unit failure detection unit, 17 Temperature sensor unit,
18 Temperature threshold recording unit, 19 Abnormal state notification unit, 20 Management PC

Claims (7)

A light source, a light source driving unit that drives the light source, a cooling unit that cools each unit, a cooling control unit that controls the cooling unit, an image forming unit that converts light from the light source to form a projection image, and light emission of the light source A light source output setting unit that sets a level and a cooling unit failure detection unit that detects a failure of the cooling unit, and the light source output setting unit is a level lower than the normal use state when the cooling unit fails A projection type image display device that is turned on and notifies an abnormal state on a projection screen by an image forming unit. The projection type image display device according to claim 1, wherein the light source output setting unit sets the light emission level of the light source according to the location of the failed cooling unit. The projection type image display device according to claim 1, wherein the light source output setting unit has a function of not turning on the light source for an arbitrary time after the failure of the cooling unit is detected. When there is a temperature sensor part that acquires the temperature of each part and a temperature threshold value recording part that records the temperature threshold value in each mode, and the temperature at any point after the failure detection of the cooling part is equal to or higher than the temperature threshold value of the temperature threshold value recording part The projection-type image display device according to claim 1, wherein the light source output setting unit has a function of not turning on the light source. 5. The projection type image display according to claim 1, further comprising: a plurality of light sources, wherein the light source output setting unit emits only some of the light sources after detecting a failure of the cooling unit. apparatus. 6. The projection type image display device according to claim 5, wherein the projection type image display device has a plurality of types of light sources, and the light source output setting unit emits only some of the light sources after detecting a failure of the cooling unit. The projection-type image display device according to claim 1, further comprising an abnormal state notification unit that notifies an abnormal state of the device other than the image forming unit.