JP2008022293A - Video display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a user from turning off a video display device with a remote controller before a picture appears after the video display device is turned on. <P>SOLUTION: The video display device includes a power-on detecting means of detecting rising of a source voltage, a timer counter which outputs a counting continuation signal indicating that a predetermined time does not lapse yet until the predetermined time lapses after the rise of the source voltage is detected, a video defeat pulse generating means which is a pulse generating means and outputs a pulse signal having a level Low while the timer counter outputs the counting continuation signal, a remote controller signal receiving means of receiving a remote controller signal, a remote controller signal decision means of deciding control information of the remote controller signal, and a remote controller signal discarding means of discarding a power source control signal when the pulse signal has the level Low and the control information of the remote controller signal decided by the remote controller signal decision means is the power source control signal. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a video display device such as a television receiver or an image monitor.

  In recent years, the spread of flat-screen digital televisions represented by plasma televisions and liquid crystal televisions has been rapidly increasing. These digital televisions have built-in tuner packs that support terrestrial digital broadcasting and BS digital broadcasting, and LSIs are actively being installed to improve image quality. However, it takes a long time for the internal tuner pack and LSI preparation operations to be completed after the TV is turned on. By combining a plurality of these, depending on the case, about 10 seconds until the video or OSD is displayed normally. take time. In general, until the internal device preparation operation is completed, it is common to perform video defeet to prevent the display of an abnormal screen. Therefore, it is misunderstood that the user has not turned on the power during this period. There is a problem that the power is turned off by pressing the power button of the remote control device again before printing. As a method for solving this problem, there is a remote control device that restricts control of a power source such as a television receiver (for example, described in Patent Document 1).

FIG. 4 is a block diagram showing the configuration of a conventional remote control device. The remote control device shown in FIG. 4 generates an operation key 103 for selecting a desired operation, a control unit 101 for outputting a control signal in response to the operation key, and a reference signal for the control unit. An oscillation circuit 102, a control output signal for controlling a device from the control unit is converted into an optical signal, and the output circuit 105 for outputting the optical signal, and a key output signal selected by the operation key is delayed for a predetermined time. A delay means 106 and a timer counter 104 for counting a preset time by an output signal obtained from the delay means are provided. When the power key, which is a part of the operation key 103 of the remote control device, is pressed, while the timer counter 104 calculates the predetermined time, the power off signal is output from the output circuit 105 even if the power key is pressed again. Not sent.
JP-A-5-268669

  As described above, in the conventional remote control device, after the power key for transmitting the infrared signal for turning on the power of the video display device such as the television receiver is pressed, the remote control device is operated for a predetermined time. It is controlled not to transmit infrared signal to turn off the power, but after turning on the main power on the video display device side controlled by the remote control device, before displaying on the video display part of the video display device There is a problem that the user misunderstands that the power of the video display device is not turned on and presses the power key of the remote control device, and as a result, the power is turned off against the user's original intention.

  In addition, when an external device such as a DVD recorder is provided in the video display device in a state in which devices such as HDMI can control each other, it is possible to turn on the power of the video display device from the external device. In this case as well, the problem is that the user misunderstands that the power of the video display device is not turned on and presses the power key of the remote control device, resulting in the power being turned off against the user's original intention. There is.

  The object of the present invention is not to limit the transmission of the power control signal on the remote control device side, but to accept the power key of the remote control device during the period before the image output after the power is turned on, in order to solve the above problems. Thus, it is to provide a video display device that prevents the power from being turned off by pressing the power button of the remote control device again before the image is displayed.

  The video display device according to the present invention includes a power-on detection unit that detects a rise of the power supply voltage, and a predetermined time elapses after the power-on detection unit detects the rise of the power supply voltage until a predetermined time elapses. A timer counter for outputting a count continuation signal indicating that the timer has not been output, and a pulse generation means, a video defeat pulse generation means for outputting a pulse signal that is low while the timer counter outputs the count continuation signal, The remote control device signal receiving means for receiving the control device signal, the remote control device signal determining means for determining the control information of the remote control device signal received by the remote control device signal receiving means, and the video defeat pulse generating means. And the control information of the remote control device signal discriminated by the remote control device signal discriminating means is low. If there was a source control signal, in which and a discarding remote control signal discarding means the power control signal.

  The video display apparatus according to the present invention can defeat video based on the output of the timer counter until the internal IC preparation operation is completed when the power is turned on.

  Further, the remote control device signal prohibiting means can discard the remote control device signal received during the video defeat period after the power is turned on, if it is a power control signal.

  In this way, it is possible to provide the video display device with means for preventing the power from being turned off by pressing the power key of the remote control device before the video display device displays an image.

  According to the present invention, since the power control signal of the remote control device is not received during the video defeat period after the video display device is turned on, the video display device displays an image after the main power source is turned on on the video display device side. Since the video display device can be controlled not to be turned off even if the power key of the remote control device is previously pressed, when the video display device is in the video defeat period, the user accidentally turns off the power. This can be prevented.

  Also, when the device connected via HDMI turns on the power of the video display device, the video display device does not turn off even if the power key of the remote control device is pressed before the video display device displays an image. Therefore, when the video display device is in the video defeat period, it is possible to prevent the user from turning off the power by mistake.

  Hereinafter, an embodiment of a video display device according to the present invention will be described. The video display apparatus to which the present invention is applied is not particularly limited to this example, and can be applied to other video display apparatuses.

(Embodiment 1)
FIG. 1 is a block diagram showing a configuration of a video display apparatus according to an embodiment of the present invention.

  The video display device shown in FIG. 1 includes a power-on detection means 1 for detecting the rise of the power supply voltage, a remote control device signal receiving means 4 for receiving a remote control device signal, and a remote control device signal for determining a remote control device signal. Discriminating means 5, timer counter 2 for measuring time, video defeat pulse generating means 3, video defeat means 7 for defeating video, and remote for discarding a specific remote control device signal received within the video defeat period It comprises control device signal discarding means 6.

  The power-on detection means 1 monitors the voltage of the power supply unit, and when the voltage of the power supply unit rises to a predetermined voltage, outputs a power supply rise signal indicating that the voltage of the power supply unit has risen to the predetermined voltage to the timer counter 2 To do.

  The timer counter 2 starts measuring time using the power-on signal from the power-on detection means 1 as a trigger. A count continuation signal indicating that the predetermined time has not elapsed is output to the video defeat pulse generating means 3 until a predetermined time has elapsed after receiving the power-on signal.

  The video defeat pulse generating means 3 is low when the count continuation signal output from the timer counter 2 is received, and is high when the count continuation signal is not received. The signal is output to the video defeat means 7 and the remote control device signal discard means 6.

  The video defeat means 7 integrates the video defeat pulse signal output from the video defeat pulse generation means 3 and the input video signal, thereby defeating the video signal and disturbing the video until the setting of the internal IC is completed. Is not displayed.

  The remote control device signal receiving means 4 receives the infrared control signal transmitted from the remote control device, converts it into an electrical signal, and outputs it to the remote control device signal discriminating means 5.

  The remote control device signal discriminating means 5 discriminates what kind of control command the electrical signal output from the remote control device signal receiving means 4 is, and uses the discriminated control information of the video display device as a video display device control signal. Output to the remote control device signal discarding means 6.

  The remote control device signal discarding means 6 receives the video defeat pulse signal output from the video defeat pulse generating means 3 and the video display device control signal output from the remote control device signal discrimination means 5 as inputs. The power supply of the video display device which is transmitted when the video defeat pulse signal input from the foot pulse generating means 3 is at the low level and the input video display device control signal is pressed by the power key of the remote control device. If the power control signal is for controlling the power, the power control signal is discarded. With the above configuration, the video display device shown in FIG. 1 can be discarded if the remote control device signal received within the video defeat period after power-on is a power control signal.

  FIG. 2 is a flowchart showing an example of processing executed by the video display apparatus shown in FIG. The operation when the invention described in this embodiment is operated will be described with reference to FIG. In FIG. 2, when the user turns on the power switch (S101), the power-on detection stage 1 detects the rise of the power supply voltage (S102) and starts a timer counter (S103). Video defeat is performed until the timer counter measures the preset period. On the other hand, the remote control device signal discarding means refers to the video defeat pulse signal to determine whether or not the video defeat is continuing (S104). It is determined whether or not the control signal received from the remote control device during the video defeat is a power control signal (S106). If the power control signal is received, it is discarded (S107). After the timer counter measures the preset period, the video defeat is canceled and reception of the power control signal from the remote control device is validated (S105).

  FIG. 3 is an example of a power-up sequence executed by the video display device shown in FIG. The power supply startup sequence of the invention described in this embodiment will be described with reference to FIG. When the power is turned on, all internal components are first reset by the ALL_RST signal to perform initialization. Next, a plurality of internal devices for displaying video signals by the signals A_ON, B_ON, and C_ON, and the panel module sequentially start operation by the P_ON signal. At the same time, data setting of the plurality of internal devices is performed by IIC communication. During this time, video defeet is performed so that a distorted image in the middle of setting is not displayed, and after all preparatory operations of the internal device for displaying the video signal are completed, the video defeat is canceled. During the video defeat period, the power control signal of the remote control device is discarded even if it is received, and the power control signal of the remote control device received after the release of the video defeat is made valid.

  As described above, in this embodiment, by not accepting the power key of the remote control device during the period before the display after the power is turned on, the power is turned off by pressing the power button of the remote control device again before the display. It is possible to provide a video display device that prevents the image from being lost.

  According to the present invention, since the power control signal of the remote control device is not received during the video defeat period after the video display device is turned on, the video display device displays an image after the main power source is turned on on the video display device side. Even if the power key of the remote control device is pressed before, the video display device can be prevented from being turned off. Also, when the device connected via HDMI turns on the power of the video display device, the video display device does not turn off even if the power key of the remote control device is pressed before the video display device displays an image. Can be. Furthermore, after the power is turned on with the power key of the remote control device, the video display device can be prevented from being turned off even if the power key of the remote control device is pressed again before the video display device displays an image.

  The video display device according to the present invention does not accept the power key of the remote control device during the period before the image output after the power is turned on, and is turned off by pressing the power button of the remote control device again before the image output. Therefore, it is possible to provide a video display device that prevents the image from being lost and is useful in video display devices such as a television receiver and an image monitor.

The block diagram which shows the structure of the video display apparatus of Embodiment 1 of this invention. The flowchart which shows operation | movement of the video display apparatus of Embodiment 1 of this invention. The figure which shows the power supply sequence of the video display apparatus of Embodiment 1 of this invention. Block diagram showing the configuration of the prior art

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Power ON detection means 2 Timer counter 3 Image | video defeat pulse generation means 4 Remote control apparatus signal receiving means 5 Remote control apparatus signal discrimination means 6 Remote control apparatus signal discarding means 7 Image defeat means

Claims (3)

Power-on detection means for detecting the rise of the power supply voltage;
A timer counter that outputs a count continuation signal indicating that a predetermined time has not elapsed until a predetermined time has elapsed after the power-on detection means detects a rise in power supply voltage;
Video defeat pulse generating means for outputting a pulse signal that is low while the timer counter outputs a count continuation signal;
Remote control device signal receiving means for receiving a remote control device signal;
Remote control device signal discriminating means for discriminating control information of the remote control device signal received by the remote control device signal receiving means;
When the pulse signal output from the video defeat pulse generation means is Low and the control information of the remote control device signal determined by the remote control device signal determination means is a power control signal, the power supply A video display device comprising a remote control device signal discarding means for discarding a control signal. The video display apparatus according to claim 1, wherein the predetermined time is longer than a period from when the power supply voltage rises until all preparation operations of the internal device for displaying the video signal are completed. The video display apparatus according to claim 1, wherein a power supply voltage is raised through a connected external device.

Images