KR20040019527A - Projection television for notifying the time of exchanging a lamp and method thereof - Google Patents

Abstract

PURPOSE: A projection television having a function of notifying time for exchanging a lamp, and a method therefor are provided to accurately judge time for exchanging a lamp by using the quantity of generating heat. CONSTITUTION: A projection television is turned on(300). After a predetermined time, a temperature sensor detects a temperature of a lamp(310). The detected temperature of the lamp is compared with an initially detected temperature which is preliminarily stored in a memory(320). If the detected temperature is lower than a half as high as the initially detected temperature, a warning message related to time for exchanging the lamp is output in OSD(On Screen Display) type(330). If not, the projection television is normally operated.

Description

Projection TV with lamp replacement timing notification and its method {PROJECTION TELEVISION FOR NOTIFYING THE TIME OF EXCHANGING A LAMP AND METHOD THEREOF}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a projection type television for informing a lamp replacement time, and more particularly, to a projection type television for measuring a lamp temperature and using the same.

Projection television, also called projection television, is a projection of a high brightness color television image on a screen using some optical means. Such projection televisions are generally used for large screen displays.

The projection type TV described above includes (1) a separate type that separates the screen and the projector, (2) an integrated type consisting of the screen and the projector as one, and (3) a back type that projects an image from the back of the screen using a transmissive type screen. have.

The projection type projector includes a lamp for emitting white light. Such a lamp is a consumable part whose performance deteriorates when used for a predetermined time, and should be replaced when its life is over. Therefore, the conventional projection televisions check the lamp replacement timing and inform the user in the manner as shown in FIG.

1 is a flowchart illustrating a lamp replacement time notification method sequentially in a projection television according to the prior art.

Referring to Fig. 1, a conventional projection television first stores a life time guaranteed by the manufacturer of the lamp in a memory in the television. Next, the time that the lamp is powered on, that is, the power-on time is accumulated and summed (step 100). Next, it is checked whether the accumulated power-on time exceeds the life time previously stored in the memory (step 110). If the accumulated power-on time exceeds the life time, a warning message regarding lamp replacement is output in OSD form, allowing the user to replace the lamp (step 120). However, if the accumulated power-on time does not exceed the life time, the operation is performed normally (step 130).

The lamp replacement time notification method used in the conventional projection television described above is a method that does not consider the characteristics of the lamp at all. Because, like general parts, the life time of the lamp varies greatly depending on the type of use and various factors, and the cooling state of the lamp itself varies according to the temperature and surrounding environment of the lamp, and also the cooling fan of the lamp. This is because the lifetime of the lamp also varies considerably depending on the deviation, the assembly state, or the like.

As such, the life of the lamp cannot be expressed numerically simply by factors of the lamp itself or factors caused by the surrounding environment. Therefore, if the lamp replacement time is uniformly judged by ignoring various factors by the conventional method, even if the lamp is actually more usable, there is a problem that the lamp is replaced once the life time of the lamp which is initially set is exceeded. There is this. In addition, even if the initial life time is not exceeded, there is a problem that continues to use the lamp that actually reached the end of life.

In order to solve the above problems, an object of the present invention is to provide a projection-type television having a lamp replacement time notification function for detecting the temperature of the lamp and determining the lamp replacement time using the same.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a flowchart sequentially illustrating a method of informing a lamp replacement time in a projector television according to the prior art.

Fig. 2 is a block diagram schematically showing a projection type television having a lamp replacement timing notification function according to the present invention.

FIG. 3 is a flowchart sequentially showing the method of informing the lamp replacement timing in the projection type TV according to the present invention shown in FIG. 2; FIG.

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

200: lamp

210: temperature detection unit

220: micom

230: memory

240: OSD output unit

250 projection TV

Projection-type television having a lamp for providing the white light according to the present invention for achieving the above object is disposed in a predetermined position around the lamp, using a temperature sensing unit for detecting the temperature of the lamp, using the temperature sensing unit A memory for storing the initial detection temperature of the measured lamp, a microcomputer for determining the lamp replacement time using the temperature of the lamp detected using the temperature sensing unit and the initial detection temperature stored in the memory, and the control of the microcomputer And an OSD output unit for informing that the lamp replacement time has arrived.

At this time, the microcomputer preferably determines that the lamp replacement time has come when the temperature of the lamp detected using the temperature sensor is equal to or less than a predetermined ratio of the initial detection temperature stored in the memory.

The lamp replacement time notification method in the projection-type television according to the present invention comprises the steps of: detecting the initial temperature of the lamp when the power is first turned on to operate the projection-type television, and storing the detected initial temperature in advance in a memory; When the projection TV is turned on, if the initial temperature is already stored in the memory, detecting the temperature of the lamp again, comparing the detected temperature of the lamp with the initial temperature previously stored in the memory, and the temperature of the lamp. If less than the predetermined ratio of the initial temperature, characterized in that it comprises the step of notifying the user that the lamp replacement time.

At this time, the step of detecting the temperature of the lamp is preferably detected in a state where there is no change in the lamp temperature after a predetermined time has passed after the power is turned on.

According to the present invention, it is not possible to uniformly determine the lamp replacement time, but it is possible to accurately determine the lamp replacement time using the heat generation amount of the lamp.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention. First, in adding reference numerals to the components of each drawing, it should be noted that the same components are denoted by the same reference numerals as much as possible, even if displayed on different drawings.

Hereinafter, with reference to the accompanying Figure 2, the configuration of the projection-type television according to the present invention will be described in detail.

Referring to FIG. 2, the projection-type television 250 according to the present invention includes a lamp 200 that provides white light, a temperature sensing unit 210 installed in a predetermined area around the lamp, and the temperature sensing unit. A microcomputer 220 for determining a lamp replacement time using the detected temperature of the lamp, an OSD output unit 240 for outputting an OSD in the form of an OSD according to the determination result of the microcomputer, and an initial state of the lamp And a memory 230 for storing the temperature.

The microcomputer 220 stores the initial detection temperature of the lamp detected when the power of the projection television is first turned on in the memory 230. On the other hand, when the power of the projection-type television is turned on while the initial detection temperature is already stored in the memory, a lamp replacement time arrives using the temperature of the lamp detected by the temperature sensing unit and the previously stored initial detection temperature. Determine whether or not.

That is, the microcomputer 220 determines that the lamp replacement time has arrived when the detected lamp temperature is less than a predetermined ratio of the previously stored initial detection temperature. At this time, if the detected lamp temperature is less than ½ of the previously stored initial detection temperature, it is preferable to determine that the lamp replacement timing has arrived.

On the other hand, the temperature sensing unit 210 is installed in a predetermined area around the lamp to measure the temperature of the lamp, the lamp temperature is saturated after a predetermined time after the power is turned on (saturation) the lamp temperature is stable It is preferable to measure. At this time, the time that the lamp temperature is constant is when about 1 hour has passed after the power is turned on.

The OSD output unit 240 outputs on the screen in the form of an OSD that the lamp replacement time has arrived under the control of the microcomputer 220.

3, the lamp replacement time notification method in the projection-type television of the present invention having the above-described configuration will be described in detail.

One embodiment of the present invention assumes that the life of the lamp is a time when the brightness is reduced to about 50% of the initial brightness of the lamp. On the other hand, the calorific value is measured by using the property that the light emission amount and the calorific value of the lamp has a linear proportional relationship, and when the measured calorific value is less than 50% of the initial calorific value, it informs the lamp replacement time.

First, when the power of the projection television is first turned on, after a predetermined time has elapsed, the temperature of the lamp is measured by using a temperature sensor installed in a predetermined area around the lamp, for example, a temperature sensor. At this time, the detection of the temperature of the lamp after a predetermined time elapses after the power is turned on is that the lamp is thermally sufficiently saturated after a predetermined time, such as about 1 hour, after the power is turned on due to the characteristics of the lamp. This is because a temperature change does not occur thereafter. In this way, the initial detected temperature measured when the power is first turned on is stored in advance in the memory.

Next, when the projection TV is turned on (300), if the lamp temperature is stabilized after a predetermined time has elapsed after the power is turned on, the temperature of the lamp is detected using the temperature detector (step 310). Next, the detected lamp temperature is compared with the previously stored initial detection temperature (step 320). At this time, if the detected lamp temperature exceeds the value corresponding to ½ of the initial detection temperature, the operation is performed normally (step 340). On the other hand, if the detected lamp temperature is less than the value corresponding to ½ of the initial detection temperature, a warning message indicating the lamp replacement time is output on the screen in OSD form, to inform the user of the lamp replacement time (step 330).

As described above, in the detailed description of the present invention, specific embodiments have been described, but various modifications can be made without departing from the scope of the present invention. For example, the definition of the life time of the lamp may vary, and the lamp replacement time may vary depending on the type of lamp. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the claims below, but also by those equivalent to the claims.

The projection type television according to the present invention does not determine the replacement time of the lamp uniformly, but can accurately determine the replacement time of the lamp by using the amount of heat generated by the lamp.

Claims (4)

A projection television comprising a lamp for providing white light, A temperature sensor disposed at a predetermined position around the lamp to detect a temperature of the lamp; A memory for storing an initial detected temperature for a lamp measured using the temperature sensor; A microcomputer that determines a lamp replacement time by using a temperature of a lamp detected by the temperature sensor and an initial detection temperature stored in the memory; And OSD output unit to inform that the lamp replacement time has arrived according to the control of the microcomputer Projection type television having a lamp replacement time notification function, characterized in that it further comprises. The lamp replacement time notification function of claim 1, wherein the microcomputer determines that the lamp replacement time is at a lamp replacement time when the temperature of the lamp detected by using the temperature sensor is less than a predetermined ratio of the initial detection temperature stored in the memory. Having projection TV. Detecting the initial temperature of the lamp when the power is first turned on to operate the projection-type television, and storing the detected initial temperature in memory in advance; If the projection television is powered on, if the initial temperature is already stored in the memory, detecting the temperature of the lamp again; Comparing the detected lamp temperature with an initial temperature previously stored in the memory; If the temperature of the lamp is less than a certain ratio of the initial temperature, informing the user that the lamp replacement time has come; Lamp replacement time notification method characterized in that it comprises a. The method of claim 3, wherein the detecting of the temperature of the lamp is performed in a state where there is no change in the lamp temperature after a predetermined time has elapsed after the power is turned on.