KR20050074805A - Image display device for showing waiting message during preparatory time and method thereof - Google Patents

Abstract

An image display apparatus is disclosed. The image display apparatus, when powered on, receives an engine part for displaying an external video signal on a screen after a predetermined preparation time has elapsed, a display lamp for displaying a predetermined standby message on a screen, and a power-on signal. An input signal receiver, an SMPS for supplying a driving voltage to the display lamp, and a controller for driving the display lamp during the preparation time to display a standby message when a power-on signal is received. Accordingly, the user can be recognized that the preparation operation is being performed.

Description

Image display device for displaying waiting message during image output preparation time and method thereof {Image display device for showing waiting message during preparatory time and method}

The present invention relates to an image display apparatus and a method for outputting a standby message during an operation preparation process, and more particularly, to prepare an operation by outputting a predetermined standby message until a normal image display is performed after power-on. The notification relates to an image display apparatus and a method thereof.

With the rapid development of electronic technology, various image display devices have been developed and marketed. In particular, TV, the most representative video display device, has already become an indispensable family in our lives. Recently, as life is abundant and residential spaces are increased, the desire for large-sized TVs is increasing, and the need for a simple large-screen display device is rising in the enterprise. However, large screen displays such as LCD (Liquid Crystal Display), PDP (Plasma Display Panel), and projection TV (projection TV) have been developed because they are not practical in terms of technology and cost in order to realize large screens of 30 inches or more using the conventional CRT method. It is spreading.

Among these, a projection TV refers to a display device that implements an image by projecting light generated from a light source onto a screen through an optical system. Such display devices are mainly used for presentations in conference rooms, movie projectors in home theaters, and home theaters in homes.

The inside of optical equipment such as a projector and a projection system displays an image using a liquid crystal display (LCD) or a cathode ray tube (CRT). Such an optical device displays an image by enlarging an image appearing on an LCD and a CRT with a lens to project a large screen, and then projecting the image onto a screen using a reflector.

On the other hand, such a projection TV can obtain a large screen, but recently, a DLP projection TV using a digital micromirro device (DMD) panel is being developed and used instead of a simple display device. Digital Light Processing (DLP) refers to a projection system that displays by reflecting an image using a DMD developed by Texas Instruments.

The DMD is a semiconductor optical switch composed of a corresponding number of fine mirrors according to the resolution. The DMD controls the reflection of light by driving the fine mirrors according to the input signal. When the image signal is reflected by using the DMD, since there is almost no light loss, the color reproduction is good and the contrast ratio is high.

1 is a diagram illustrating a general configuration of a conventional DLP projection TV. According to FIG. 1, the DLP projection TV has a light source 10, a color filter wheel 20, a light tube 30, a lens 40, a DMD panel 50, a screen 70 and a projection lens 60. . The dashed-dotted line shown in FIG. 1 represents an optical axis.

As the light source 10, an arc lamp, a laser gun, or the like is used, and emits white light. The color filter wheel 20 rotates in the arrow direction shown and is divided into R (red), G (green), and B (blue) regions. The white light emitted from the light source 10 is divided into R, G, and B beams by the R, G, and B regions of the color filter wheel 20, and transmitted.

The light tube 30 is a hexahedron shape and the inside is a through hole. Each R, G, B beam that has passed through the color wheel 20 is subjected to a surface light source inside the light tube 30. The lens 40 diffuses the surface light source laser beam to be incident on the DMD panel 50.

The DMD panel 50 is composed of a plurality of micromirrors 51. The R, G, and B beams classified for each wavelength form monochromatic color bands in the order of incidence on the DMD panel 50, and are reflected by the micromirror 51. That is, the micromirror 51 on the DMD panel 50 switches to move in two states ("on" and "off") to produce DMD digital light, so that when the R, G, B beam is incident, the digital gray is removed from the surface. (gray) Reflects the image. Each of the reflected R, G, and B beams passes through the projection lens 60 to implement an image on a screen.

Meanwhile, according to the DLP projection TV, the DMD panel 50 drives the plurality of micromirrors 51 according to the video signal to be output. In this state, when the user turns off the power, each micromirror 51 Is fixed as it is currently moving. Therefore, when the user powers on the TV again, the micromirror must be driven again according to a new external video signal, and thus, the preparation operation for initializing the current moving state is performed. It takes about 30 seconds to 1 minute to perform this preparation in a typical DLP projection TV. Since this time is relatively long, the user can determine that the device is defective if there is no change in the screen even though the TV is clearly turned on.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a predetermined waiting time for a predetermined time until a normal operation is performed after being powered on, and during the preparation time, It is an object of the present invention to provide an image display apparatus and method for displaying a message to a user.

The video display device according to the present invention includes an engine part for displaying an external video signal on a screen after a predetermined preparation time has elapsed when the power-on is turned on, a display lamp for displaying a predetermined waiting message on the screen, and a power- When the on signal is received, the control unit includes a control unit for driving the display lamp during the preparation time. The controller may notify the user that the display lamp is being prepared for operation by driving the display lamp until the engine part performs normal operation after being powered on.

On the other hand, preferably, the image display apparatus may further include an input signal receiver for receiving the power-on signal, and an SMPS for supplying a driving voltage to the display lamp. A user may input the power-on signal by operating a power switch attached to a main body of a video display device or a power switch attached to a remote controller.

The engine part may be applied to a reflective image display apparatus including a light source for outputting an optical signal corresponding to an external image signal, and a reflector for reflecting the optical signal onto the screen. In this case, preparation time is required in the process of switching the state of the reflector at the time of power-off to the initialization state. During this preparation time, the display lamp is driven to display the standby message.

Meanwhile, the present invention can be applied to a DLP projection TV that outputs an image using a DMD.

The image display method according to the present invention includes (a) performing a preparatory operation for outputting the video signal when a power-on signal is received, and (b) a predetermined standby message during a time for performing the preparatory operation. Displaying on the screen.

In this case, preferably, the step (b) includes determining whether the preparation operation is completed, and driving the display lamp to display the waiting message on the screen if the preparation operation is not completed. Can be.

On the other hand, if the image display method is applied to the reflective projection TV, the operation of initializing the state of the reflector reflecting the optical signal corresponding to the external image signal and projecting on the screen may be a preparation operation. Accordingly, until a normal operation is possible, a waiting message is displayed on the screen so that the user recognizes that it is not a malfunction and waits.

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

2 is a block diagram illustrating a configuration of an image display apparatus 100 according to the present invention. According to FIG. 2, the image display apparatus 100 includes an input signal receiver 110, a controller 120, an engine part 130, an SMPS 140, and a display lamp 150.

The input signal receiver 110 receives a key signal corresponding to a power switch, a direction key, and a numeric key attached to an external remote controller or a main body, and inputs the signal to the controller 120.

The controller 120 performs a corresponding operation according to the key signal. That is, when a power-on signal for turning on the image display apparatus 100 is input, the image display apparatus is turned on by transmitting a control signal to each component unit in the image display apparatus 100.

The engine part 130 collectively refers to a part that performs an external broadcast signal under the control of the control unit 120, converts it into a form that can be output, and actually outputs the data using a screen. The engine part 130 generally requires a preparation time for a predetermined time when it is turned on in the power off state.

The controller 120 drives the display lamp 150 until the engine part 130 can normally output the external broadcast signal after the preparation time, that is, the current preparation operation is being performed on the screen. It outputs a predetermined waiting message for notifying.

When the display lamp 150 is turned on, the mask having the waiting message engraved on the light emitting portion of the display lamp 150 may display the waiting message on the screen. Therefore, displaying the standby message by using the display lamp 150 is achieved by simply supplying a driving voltage to the lamp 150 without using the engine part 130.

To this end, the controller 120 may drive the display lamp 150 using a switch mode power supply (SMPS) 140. SMPS 140 is a device for converting the input power AC to output power DC, using a semiconductor device such as a power transistor as a switch to convert the DC input voltage into a square wave voltage, and then the DC output voltage controlled through the filter. To get the device. The controller 120 controls the SMPS 140 to apply a driving voltage to the display lamp 150 to display a standby message on the screen.

3 is a schematic diagram showing the configuration of a DLP projection TV presented as an embodiment of the present invention. According to FIG. 3, the light source 131, the color filter wheel 133, and the DMD panel (Digital Micromirro Device panel 135) among the internal configuration units of the engine part 130 are illustrated, and “Please wait a minute!” Also shown is a display lamp engraved with a wait message, and a screen 160 on which the wait message is displayed.

As described above, when white light is emitted from the light source 131, the color filter wheel 20 divides the white light into R, G, and B beams, and then projects the white light onto the DMD panel 135. The DMD panel 135 drives each micromirror to reflect the R, G, and B beams onto the screen 160 to output an image on the screen 160.

In this case, when the power is turned off after the user's operation or due to an abnormal operation of the device itself, the micromirrors on the DMD panel 135 must be returned to the initial state from the state at which the micromirror 135 is turned off. According to this preparation operation, it takes a preparation time of about 30 seconds to 1 minute.

While it is determined that such preparation is in progress, the controller 120 drives the display lamp 150 to display a predetermined waiting message on the screen 160. 4 illustrates an image display apparatus displaying such a waiting message.

On the other hand, the controller 120 turns off the display lamp 150 when a signal indicating that the preparation operation is completed is received from the engine part 130, and allows the engine part 130 to perform a normal image output operation.

5 is a flowchart illustrating an image display method performed in the image display apparatus 100 according to the present invention. Referring to FIG. 5, when the image display apparatus 100 receives a power-on signal from a remote controller or a power switch of a main body (S510), the engine part 130 performs a preparation operation necessary for receiving and outputting an image signal. It is performed (S520).

The controller 120 determines whether the preparation operation is completed (S530), and if the preparation operation is still in progress, drives the display lamp 540 (S540). As described above, the display lamp 540 is attached to the light emitting portion of the lamp 540, the mask engraved with a waiting message to inform the user that the preparation operation is currently in progress, thereby causing the display lamp 540 to emit light. If so, the message can be displayed on the screen 160.

The controller 120 checks from time to time whether the preparation operation of the engine part 130 is completed (S530), and when it is determined that the preparation is completed, turns off the display lamp 150 (S550). The controller 120 controls the display lamp 150 to be ON-OFF by controlling the SMPS 140 for supplying driving power to the display lamp 150.

After the display lamp 150 is turned off to eliminate the display of the standby message, the engine part 130 normally operates to output an external signal on the screen 160 (S560).

Accordingly, the user can recognize that the video display device 100 is not defective and that the preparation operation is necessary until it operates normally.

As described above, according to the present invention, when the image display apparatus is newly powered on, a user can display a predetermined standby message for a time until a normal image is output on the screen. Make sure that it is normal. Accordingly, it is possible to wait for the preparation time of the image display apparatus.

The present invention has been described in detail with reference to exemplary embodiments, but various modifications can be made without departing from the scope of the present invention by those skilled in the art to which the present invention pertains. Will understand. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

1 is a schematic diagram showing the internal structure of a conventional DLP projection TV,

2 is a block diagram showing a configuration of a display apparatus according to the present invention;

Figure 3 is a schematic diagram showing the internal structure of the DLP projection TV presented as an embodiment of the present invention,

4 is a schematic diagram showing displaying a predetermined waiting message in a display device according to the present invention;

5 is a flowchart illustrating a method of displaying a standby message in a display device according to the present invention.

Explanation of symbols on the main parts of the drawing

110: input signal receiving unit 120: control unit

130: engine part 131: light source

133: color filter wheel

135: DMD (Digital Micromirro Device)

140: SMPS (Switch Mode Power Supply)

150: display lamp 160: screen

Claims (7)

An engine part configured to display an external video signal on a screen after a predetermined preparation time has elapsed when powered on; A display lamp displaying a predetermined waiting message on the screen; and And a controller configured to drive the display lamp during the preparation time when the power-on signal is received. The method of claim 1, An input signal receiver configured to receive the power-on signal; and And a SMPS for supplying a driving voltage to the display lamp. The method of claim 1, The engine part, A light source for outputting an optical signal corresponding to an external video signal; and And a reflector reflecting the optical signal to project the image onto the screen. The method according to claim 1 or 3, The display lamp is a video display device, characterized in that the mask with the waiting message is attached to the light emitting portion. An image display method of a display apparatus for receiving an external image signal and outputting the same on a screen, (a) if a power-on signal is received, performing a preparation operation for outputting the video signal; and and (b) displaying a predetermined waiting message on a screen during the preparation operation. The method of claim 5, In step (b), Determining whether the preparation operation is completed; and And driving a display lamp to display the standby message on the screen if the preparation operation is not completed. The method according to claim 5 or 6, The image display apparatus is a DLP projection apparatus for reflecting and projecting an optical signal corresponding to the external image signal on a screen using a digital micromirro device (DMD), wherein the preparation operation is to change the state of the DMD to an initial state. The video display method characterized in that.