KR20100047748A - Projection engine apparatus and its lamp management method - Google Patents

Projection engine apparatus and its lamp management method Download PDF

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Publication number
KR20100047748A
KR20100047748A KR1020080106766A KR20080106766A KR20100047748A KR 20100047748 A KR20100047748 A KR 20100047748A KR 1020080106766 A KR1020080106766 A KR 1020080106766A KR 20080106766 A KR20080106766 A KR 20080106766A KR 20100047748 A KR20100047748 A KR 20100047748A
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KR
South Korea
Prior art keywords
lamp
projection
main
unit
main lamp
Prior art date
Application number
KR1020080106766A
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Korean (ko)
Inventor
고명기
Original Assignee
주식회사 대우일렉트로닉스
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Priority to KR1020080106766A priority Critical patent/KR20100047748A/en
Publication of KR20100047748A publication Critical patent/KR20100047748A/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/10—Compensation for variation of ambient temperature or pressure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3155—Modulator illumination systems for controlling the light source
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3164—Modulator illumination systems using multiple light sources

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Projection Apparatus (AREA)

Abstract

PURPOSE: A projection image device and a method for managing a lamp of the same are provided to alternatively use a main lamp and a sub lamp of the projection image device, thereby managing lamp lifetime. CONSTITUTION: A temperature sensing unit(106) senses the inner temperature of a projection engine unit including a main lamp, a sub lamp and a cooling plate. When the inner temperature is relatively higher than a reference temperature, a controller(102) switches a lamp to the sub lamp or the main lamp. A switching unit(112) switches power from the main lamp to the sub lamp or from the sub lamp to the main lamp according to switching control of the controller.

Description

PROJECTION ENGINE APPARATUS AND ITS LAMP MANAGEMENT METHOD}

The present invention relates to a projection imaging apparatus, and more particularly, to a projection imaging apparatus and a lamp management method thereof suitable for managing the life of the main lamp and the auxiliary lamp included in the projection imaging apparatus.

As is well known, a projection imaging apparatus is a device that implements a large screen by applying a principle of a projector that projects an image on a screen by using a mirror and an optical lens, and according to a display element that displays signal processed image information, CRT ( Cathode Ray Tube (LCD), Liquid Crystal Display (LCD) and Digital Light Processing (DLP)

The projection imaging apparatus has a light source for supplying light and a projection engine for separating and synthesizing the light emitted from the light source unit to project an image on a screen. The light source includes a mercury lamp and a metal halide lamp. And arc discharge lamps such as Xenon lamps are mainstream.

Since such lamps increase in temperature due to prolonged use, thereby degrading the function of internal circuit components, melting some of the components vulnerable to heat, and shortening the life of the lamp, the projection imaging apparatus cools the heat emitted from the light source unit. Cooling means for doing so is essentially required.

On the other hand, the optical system of the projection engine is largely divided into an illumination system and a projection system, and the illumination system condenses the light from the lamp and uniformly illuminates the imager of a small size, and the projection system is an image. It enlarges the image of and enlarges the image on the screen.

The most important performance in the optical system of such a projection engine is how efficiently the light from the light source is condensed on the image. The light collection efficiency is called the light collection efficiency. In fact, since there is no point light source, all light sources have an area or volume, and the light collection efficiency is determined according to the volume or area.

On the other hand, when the optical system configuration of the projection engine included in the projection imaging apparatus is schematically described, a projection engine installed in the projection imaging apparatus includes a lamp, a blocking filter for blocking unnecessary infrared rays among light sources generated from the lamp, and a blocking filter. A light pipe to make the light source uniform, a relay lens to focus the light source through the light pipe at a desired position, a mirror to change the path of the light, and a light source from the lamp And a projection lens for projecting a light source onto the screen and a polarizing prism for removing some of them.

When the lamp life of the projection engine included in such a projection imaging device reaches the end of lamp life, the lamp should be replaced.When replacing the lamp, the user can replace the lamp when the brightness of the screen becomes dark or recognize and display it by the control part in the projection engine. If it is determined that the power-on time is exceeded by counting and calculating the power-on time, the control unit displays the replacement time on the screen by using the OSD menu screen, etc. In the conventional projection imaging apparatus, the main lamp used as a light source and the When the life of the main lamp reaches the end of the life of the main lamp, the auxiliary lamp is provided to provide light to the projection imaging apparatus.

However, in the conventional projection imaging apparatus, the lifespan of the main lamp and the auxiliary lamp is closely related to the internal temperature of the projection imaging apparatus. When the internal temperature is continuously maintained at a temperature higher than the reference temperature, the main lamp or the auxiliary lamp generates light. Since the life of the lamp is drastically shortened, there was a problem in that it had to be replaced before the end of the life according to the original specification.

Accordingly, the present invention continuously checks the internal temperature of the projection imaging apparatus, and when the temperature becomes relatively higher than the reference temperature, the projection imaging apparatus capable of managing the lamp life using the main lamp and the auxiliary lamp alternately and the lamp management thereof To provide a method.

According to an aspect of the present disclosure, there is provided a temperature sensing unit configured to sense an internal temperature of a projection engine unit including a main lamp or an auxiliary lamp and a heat sink, and the main lamp when the sensed internal temperature is relatively higher than a preset reference temperature. Provided is a projection imaging device including a control unit for controlling to switch the auxiliary lamp or the auxiliary lamp to the main lamp.

In another aspect, the present invention, the step of measuring the internal temperature of the projection engine including a main lamp or auxiliary lamp and a heat sink when the projection engine is driven, comparing the measured internal temperature and a predetermined reference temperature and When the internal temperature has a value higher than the preset reference temperature, switching from the main lamp to the auxiliary lamp or from the auxiliary lamp to the main lamp; A lamp management method of a projection imaging apparatus comprising driving the projection engine using a main lamp.

The present invention, unlike the conventional method of generating a light source by switching to the auxiliary lamp at the end of the life of the main lamp, when driving the projection engine using the main lamp or auxiliary lamp includes the main lamp or auxiliary lamp and the heat sink. The internal temperature of the projection engine is sensed, and if the sensed internal temperature is relatively higher than the preset reference temperature, the supply power is switched from the main lamp or the auxiliary lamp to the auxiliary lamp or the main lamp to generate a light source, and the generated light source. By driving the projection engine by using, it is possible to effectively manage the life of the main lamp and the auxiliary lamp decreases due to the internal temperature of the projection engine.

According to an aspect of the present invention, if the internal temperature sensed when driving the projection engine using the main lamp in the projection imaging apparatus is a value higher than the preset reference temperature, the main lamp is converted into the auxiliary lamp, and then the projection is performed using the auxiliary lamp. When the engine is driven and the internal temperature sensed when the projection engine is driven using the auxiliary lamp is relatively higher than the preset reference temperature, the auxiliary lamp is switched to the main lamp, and then the projection engine is driven using the main lamp. This technical means can solve the problems in the prior art.

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

1 is a block diagram of a projection imaging apparatus suitable for managing the lifespan of a main lamp and an auxiliary lamp according to a preferred embodiment of the present invention, which includes a control unit 102, a projection engine unit 104, a temperature sensing unit 106, The storage unit 108 includes a power supply unit 110 and a switching unit 112.

Referring to FIG. 1, the control unit 102 performs overall operation control of the projection imaging apparatus. The control unit 102 generates a light source through a main lamp and provides a control signal for displaying a screen to the projection engine unit 104. The control signal for sensing the internal temperature of the engine unit 104 is provided to the temperature sensing unit 106, and the sensed internal temperature transmitted from the temperature sensing unit 106 is compared with a preset reference temperature. When the internal temperature has a value higher than the preset reference temperature, a control signal for switching from the main lamp to the auxiliary lamp is provided to the projection engine unit 104, the power supply unit 110, and the switching unit 112.

In addition, the control unit 102 generates a light source through the converted auxiliary lamp and provides a control signal for sensing the internal temperature of the projection engine unit 104 to the temperature sensing unit 106 while displaying the screen. After comparing the sensed internal temperature transmitted from the unit 106 with the preset reference temperature stored in the storage unit 108, the main lamp in the auxiliary lamp when the sensed internal temperature has a value higher than the preset reference temperature The control signal for switching to the control unit is provided to the projection engine unit 104, the power supply unit 110, and the switching unit 112.

In addition, the projection engine unit 104 selectively generates a light source (main light source or auxiliary light source) through a main lamp or an auxiliary lamp according to a control signal provided from the controller 102, and blocks unnecessary infrared rays among the generated light sources. After the infrared light source is made uniform, the light source is condensed at the desired position, and after changing the path of the collected light source, some of the light sources from the main lamp or auxiliary lamp are removed and the light source is projected onto the screen.

Next, the temperature sensing unit 106 senses the internal temperature of the projection engine unit 104, and the sensed internal temperature is transmitted to the control unit 102. Here, the internal temperature of the projection imaging apparatus refers to a temperature generated by the main lamp or the auxiliary lamp of the projection engine unit 104 and the heat sink not shown.

Meanwhile, the storage unit 108 stores various application programs for operating the projection imaging apparatus, and has a preset reference temperature for switching the main lamp and the auxiliary lamp. The application program, the preset reference temperature, etc. are required. Extracted accordingly and provided to the control unit 102.

The power supply unit 110 supplies power to each component in accordance with a control signal from the control unit 102, and supplies power to the switching unit 112 to supply power to the projection engine unit 104.

Next, the switching unit 112 is switched in accordance with a control signal from the control unit 102 to apply power from the power supply unit 110 to the main lamp of the projection engine unit 104 or to provide an auxiliary lamp of the projection engine unit 104. Power from the power supply unit 110 is applied.

Next, a projection engine for displaying a screen by condensing a light source from a main lamp or an auxiliary lamp in a projection imaging device having the above-described configuration will be described.

FIG. 2 is a configuration diagram of a projection engine unit suitable for condensing a light source from a main lamp or an auxiliary lamp to display a screen according to a preferred embodiment of the present invention, wherein the projection engine unit 104 may be configured according to a selective power supply. A main lamp 202 for selectively generating a light source), an auxiliary lamp 204 for selectively generating a light source (auxiliary light source) according to an optional power supply, and a light source generated by the main lamp 202 or the auxiliary lamp 204 A light filter 206 for blocking unnecessary infrared rays, a light pipe 208 for uniformizing the light source passing through the blocking filter 206, and a light source passing through the light pipe 208 at a desired position. A relay lens 210, a mirror 212, a main lamp 202, or an auxiliary lamp 204 that changes a path of a light source passing through the relay lens 210 in a direction in which the polarizing prism 214 is located. Of the light sources from A polarizing prism 214 that removes a portion and a projection lens 216 that projects the light source onto the screen.

Next, when the internal temperature sensed when driving the projection engine using the main lamp in the above-described projection imaging apparatus is a value higher than the preset reference temperature, the main lamp is converted into the auxiliary lamp and then the projection is performed using the auxiliary lamp. When the engine is driven, and the sensed internal temperature is relatively higher than the preset reference temperature when the projection engine is driven using the auxiliary lamp, the auxiliary lamp is converted to the main lamp and then the projection engine is driven using the main lamp. Explain.

3 is a flowchart illustrating a process of driving a projection engine by switching a main lamp or an auxiliary lamp with each other according to a sensed internal temperature according to an embodiment of the present invention.

Referring to FIG. 3, in the projection engine driving mode using the main lamp 202 of the projection imaging apparatus (step 302), the controller 102 determines the temperatures of the main lamp 202 and the heat sink of the projection engine unit 104. The control signal for sensing is provided to the temperature sensing unit 106, and the temperature sensing unit 106 senses the temperature of the main lamp 202 and the heat sink of the projection engine unit 104 to control the sensed internal temperature. 102) (step 304).

The controller 102 extracts the preset reference temperature in the storage 108 and then checks whether the sensed internal temperature transmitted from the temperature sensor 106 has a value higher than the preset reference temperature (see FIG. Step 306).

As a result of the check in the step 306, if the sensed internal temperature has a relatively smaller value than the preset reference temperature, the process of steps 302 to 306 is continuously performed, and the sensed internal temperature is greater than the preset reference temperature. In the case of having a relatively high value, the control unit 102 switches the main lamp 202 from the main lamp 204 to the auxiliary lamp 204 to supply a switching control signal for driving the projection engine unit 104 to the power supply unit 110 and the switching unit 112. (Step 308).

Accordingly, the power supplied from the power supply unit 110 is switched and applied from the main lamp 202 of the projection engine unit 104 to the auxiliary lamp 204 through the switching unit 112, and thus the projection engine unit 104 ) Drives the projection engine using the auxiliary lamp 204 (step 310).

Next, while the control unit 102 drives the projection engine using the auxiliary lamp 204, the control unit 102 senses a control signal for sensing the temperature of the auxiliary lamp 204 and the heat sink of the projection engine unit 104. To the temperature sensing unit 106, and the temperature sensing unit 106 senses the temperature of the auxiliary lamp 204 and the heat sink of the projection engine unit 104 to transmit the sensed internal temperature to the controller 102. (Step 312).

The controller 102 extracts the preset reference temperature in the storage 108 and then checks whether the sensed internal temperature transmitted from the temperature sensor 106 has a value higher than the preset reference temperature (see FIG. Step 314).

As a result of the check in the step 314, if the sensed internal temperature has a relatively smaller value than the preset reference temperature, the process of steps 310 to 314 is continuously performed, and the sensed internal temperature is greater than the preset reference temperature. When the control unit 102 has a relatively high value, the control unit 102 switches the auxiliary lamp 204 from the auxiliary lamp 202 to the main lamp 202 and supplies a switching control signal for driving the projection engine unit 104 to the power supply unit 110 and the switching unit 112. (Step 316).

Accordingly, the power supplied from the power supply unit 110 is switched and applied from the auxiliary lamp 204 of the projection engine unit 104 to the main lamp 202 through the switching unit 112, and thus the projection engine unit 104. ) Drives the projection engine using the main lamp 202 (step 318).

Therefore, the internal temperature of the projection imaging apparatus is sensed to compare the sensed internal temperature with a preset reference temperature, and accordingly, by using the main lamp and the auxiliary lamp alternately to drive the projection engine, the main lamp according to the internal temperature and The life of auxiliary lamp can be managed effectively.

In the above description, the present invention has been described with reference to preferred embodiments, but the present invention is not necessarily limited thereto. Those skilled in the art to which the present invention pertains have various knowledge without departing from the technical spirit of the present invention. It will be readily appreciated that branch substitutions, modifications and variations are possible.

1 is a block diagram of a projection imaging apparatus suitable for managing the lifespan of a main lamp and an auxiliary lamp according to a preferred embodiment of the present invention;

2 is a configuration diagram of a projection engine unit suitable for displaying a screen by condensing a light source from a main lamp or an auxiliary lamp according to a preferred embodiment of the present invention;

3 is a flowchart illustrating a process of driving a projection engine by switching a main lamp or an auxiliary lamp with each other according to a sensed internal temperature according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

102 control unit 104 projection engine unit

106: temperature sensing unit 108: storage unit

110: power supply unit 112: switching unit

202: main lamp 204: auxiliary lamp

206: cutoff filter 208: light pipe

210: relay lens 212: mirror

214: polarization prism 216: projection lens

Claims (3)

A temperature sensing unit configured to sense an internal temperature of the projection engine unit including a main lamp or an auxiliary lamp and a heat sink; A control unit for controlling the main lamp to switch to the sub lamp or the sub lamp to the main lamp when the sensed internal temperature is relatively higher than a preset reference temperature. Projection imaging apparatus comprising a. The method of claim 1, The projection imaging device, A switching unit for switching supply power from the main lamp to the auxiliary lamp or switching the supply power from the auxiliary lamp to the main lamp according to the switching control of the controller; Projection imaging device further comprising. Measuring an internal temperature of the projection engine including a main lamp or an auxiliary lamp and a heat sink when the projection engine is driven; Comparing the measured internal temperature with a preset reference temperature; As a result of the comparison, when the internal temperature has a value higher than the preset reference temperature, switching from the main lamp to the auxiliary lamp or from the auxiliary lamp to the main lamp; Driving the projection engine by using the switched auxiliary lamp or main lamp Lamp management method of a projection imaging device comprising a.
KR1020080106766A 2008-10-29 2008-10-29 Projection engine apparatus and its lamp management method KR20100047748A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020080106766A KR20100047748A (en) 2008-10-29 2008-10-29 Projection engine apparatus and its lamp management method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020080106766A KR20100047748A (en) 2008-10-29 2008-10-29 Projection engine apparatus and its lamp management method

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KR20100047748A true KR20100047748A (en) 2010-05-10

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