JP2007163684A - Projector device and video adjustment method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector device which performs automatic adjustment in a short period of time. <P>SOLUTION: A wait time calculation part 19 calculates a wait time on the basis of a frequency of an input signal to the projector device. A detection result acquisition part 15 acquires data detected from the input signal, a plurality of times at intervals of the wait time calculated by the wait time calculation part 19. Automatic adjustment parts (16 and 17) adjust a video of the input signal on the basis of data acquired by the detection result acquisition part 15, thereby generating the video for output. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a projector having an automatic adjustment function.

  In recent years, the progress of projector devices has been remarkable, and various improvements have been made in response to various requirements so that they can be used more easily. Among them, it is required that a user can project a good image only by inputting a video signal without performing any adjustment.

  In order to realize this, the projector device needs to perform various automatic adjustments on the image based on the input video signal. Conventionally, a projector device that automatically adjusts an input signal has been proposed (see, for example, Patent Document 1). In order to make it easy to use the projector device, items to be automatically adjusted include, for example, resolution, phase, video level, and image display position.

  The resolution adjustment means that the resolution of the input signal is set to the resolution for video output of the projector device. For this purpose, it is necessary to first obtain the resolution of the input signal and convert it to the resolution for video output from the resolution by a predetermined algorithm. The phase adjustment is to adjust a phase (sampling phase) for capturing an input signal so that a good gain can be stably obtained. This makes it possible to output a stable video with little flicker. The adjustment of the video level is to adjust the amplitude of the video signal so that the output video level is within a predetermined range. As a result, an image with appropriate brightness can be output. The adjustment of the display position is to match the start timing of the image processing with the image display element based on the synchronization signal of the input video signal. Since the image position is adjusted after adjusting the resolution, phase, and video level, if these processes are performed at high speed, the image display position is also adjusted at high speed.

In many cases, these automatic adjustments are performed based on data detected from a video signal or a synchronization signal. Therefore, it is necessary to acquire predetermined data detected from the video signal or the synchronization signal. At that time, in order to perform good automatic adjustment, it is common to acquire data over a plurality of times with a time interval in consideration of variations in input signals and the like.
JP-A-6-22164

  As described above, when the data detected from the video signal or the synchronization signal is acquired, the data detected from the video signal or the synchronization signal is performed for each cycle of the input signal. Since it is updated, it is necessary to lengthen this time interval if the frequency of the input signal is low.

  Usually, projectors are designed to accept input signals of various frequencies. For this reason, in the conventional projector, the time interval for acquiring the predetermined data detected from the video signal or the synchronization signal is set in accordance with the signal having the lowest frequency among the allowable input signals. For example, if the minimum allowable frequency is 24 Hz, the maximum period of the input signal is 42 msec. Therefore, the wait time needs to be 42 msec or more. The conventional projector device uses this wait time of 42 msec for all input signals. Therefore, when the frequency of the input signal is higher than 24 Hz, the project apparatus has an unnecessarily long wait time.

  This wasted wait time has become a factor that lengthens the time required to acquire data detected from the video signal or the synchronization signal and lengthens the time required to display the video. Needless to say, the shorter the time taken to display the image of the projector device, the better.

  An object of the present invention is to provide a projector device that can perform automatic adjustment in a short time.

In order to achieve the above object, the projector device of the present invention provides:
A projector device that adjusts and outputs an image of an input signal,
A wait time calculation unit for calculating a wait time based on the vertical frequency of the input signal;
A detection result acquisition unit that acquires data detected from the input signal a plurality of times at intervals of the wait time calculated by the wait time calculation unit;
An automatic adjustment unit that adjusts the video of the input signal based on the data acquired by the detection result acquisition unit.

  According to the present invention, the wait time calculation unit calculates the wait time suitable for the input signal that is actually being received using the frequency information, and the detection result acquisition unit acquires the data after the wait time. By setting an appropriate wait time according to the vertical frequency of the data, it is possible to prevent an excessively long time for reading data, and to shorten the time for automatic adjustment.

  The wait time calculation unit may set the cycle of the input signal as the wait time.

  Thereby, a plurality of data can be acquired in the shortest time.

  The detection result acquisition unit may determine data used in the automatic adjustment unit based on the plurality of acquired data.

  As a result, it is possible to eliminate variations in the input signal and perform a good automatic adjustment.

Further, the data is video position data,
The automatic adjustment unit may obtain the resolution of the video of the input signal using the video position and the frequency of the input signal, and adjust the video resolution to a predetermined resolution for video output.

The data is video level data,
The automatic adjustment unit may adjust the phase of the timing for taking in the input signal so that the video level of the input is stabilized.

  Since the phase adjustment is control for finding the optimum phase, the setting and changing of the phase are repeated many times, so that a significant time saving effect can be obtained.

The data is video level data,
The automatic adjustment unit may adjust the gain of the video level so that the output video level is within a predetermined range.

  The automatic adjustment unit obtains the start timing of image processing using the frequency of the input signal with reference to the synchronization signal of the input signal, and adjusts the image processing to start at the start timing. Also good.

  According to the present invention, the wait time calculation unit calculates the wait time suitable for the input signal that is actually being received using the frequency information, and the detection result acquisition unit acquires the data after the wait time. By setting an appropriate wait time according to the frequency of the data, it is possible to prevent an excessively long time for reading data, and to shorten the time required for automatic adjustment.

  Embodiments for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram showing the configuration of the projector apparatus according to the first embodiment. In the first embodiment, a projector device that automatically adjusts the resolution is illustrated. The resolution adjustment means that the resolution of the input signal is set to the resolution for video output of the projector device. For this purpose, it is necessary to first obtain the resolution of the input signal and convert it to the resolution for video output from the resolution by a predetermined algorithm.

  Referring to FIG. 1, the projector apparatus according to the present embodiment includes a video / synchronization signal reception control unit 11, a video position detection unit 12, a detection result update unit 13, a detection result storage unit 14, a detection result read processing unit 15, and a resolution calculation. A processing unit 16, a resolution setting processing unit 17, a synchronization signal frequency counter unit 18, and a wait time calculation processing unit 19 are provided.

  The video / synchronization signal reception control unit 11 receives various types of video signals and synchronization signals.

  The video position detection unit 12 detects the position of the video from the signal received by the video / synchronization signal reception control unit 11.

  The detection result storage unit 14 stores data of results detected by the video position detection unit 12.

  The detection result update unit 13 updates the data stored in the detection result storage unit 14 with the result detected by the video position detection unit 12 in synchronization with the vertical synchronization signal.

  The detection result read processing unit 15 reads the data stored in the detection result storage unit 14 a predetermined number of times with a set wait time, and sends the obtained data to the resolution calculation processing unit 16. The wait time that determines the read timing is set by the wait time calculation processor 19.

  The synchronization signal frequency counter unit 18 detects the frequency (vertical frequency) of the signal received by the video / synchronization signal reception control unit 11.

  The resolution calculation processing unit 16 calculates the resolution of the video signal based on the data read by the detection result reading processing unit 15 and the frequency information detected by the synchronization signal frequency counter unit 18.

  The resolution setting processing unit 17 uses the resolution information of the video signal calculated by the resolution calculation processing unit 16 to adjust the input video signal to the output resolution.

  The wait time calculation processing unit 19 calculates the wait time from the frequency information detected by the synchronization signal frequency counter unit 18 and sets it in the detection result read processing unit 15. The calculated wait time is a value corresponding to the period of the input signal, and becomes longer when the frequency is lower and shorter when the frequency is higher.

  Even if the data updated in synchronization with the vertical synchronization signal by the detection result update unit 13 is read again within a period, only the same data that has not been updated is read. Therefore, the wait time needs to be longer than the period of the input signal. For example, a period may be obtained from frequency information and used as a wait time. Thereby, a plurality of data can be acquired in the shortest time. Further, the wait time may be longer than the cycle, for example, a predetermined multiple of the cycle.

  The operation of the projector apparatus having such a configuration will be described below.

  FIG. 2 is a flowchart showing the operation of the projector apparatus according to the first embodiment. Here, the operations of the detection result read processing unit 15 and the wait time calculation processing unit 19 will be described.

  Referring to FIG. 2, first, the detection result read processing unit 15 acquires data from the detection result storage unit 14 (step A1). Next, the detection result reading processing unit 15 determines whether or not the number of data acquisition has reached the threshold value n times (step A2).

  If the number of data acquisition times has not reached n, the detection result read processing unit 15 waits for the set wait time and then returns to step A1 to acquire the next data.

  On the other hand, if the number of times of data acquisition has reached n times, the detection result read processing unit 15 determines the acquired data based on the obtained n pieces of data (step A5), and ends the process. As an example, the position may be determined as the video position on the condition that the same video position is detected continuously a predetermined number of times. This eliminates variations in the input signal and enables good automatic adjustment.

  The wait time used by the detection result read processing unit 15 in step A3 is calculated by the wait time calculation processing unit 19 based on the frequency information (vertical frequency information) from the synchronization signal frequency counter unit 18 (step S3). A4).

  As described above, according to the present embodiment, the wait time calculation processing unit 19 uses the vertical frequency information obtained by the synchronization signal frequency counter unit 18 to determine a wait time suitable for the input signal that is actually being received. Since the detection result readout processing unit 15 calculates the necessary time for the automatic adjustment from the detection result storage unit 14 after the wait time is calculated, an appropriate wait time is set according to the frequency of the input signal, and the data It can be prevented that reading takes longer than necessary. As a result, the projector device of this embodiment can reduce the time required for automatic adjustment.

  For example, when the lowest allowable frequency is 24 Hz, but the frequency of the input signal actually being received is 60 Hz, the projector device does not have 42 msec adjusted to the lowest frequency (24 Hz) but the actual frequency (60 Hz). Since the wait time is set to 17 msec, the useless wait time can be reduced and the time for automatic adjustment can be shortened.

  FIG. 3 is a block diagram showing the configuration of the projector apparatus according to the second embodiment. The second embodiment exemplifies a projector device that automatically adjusts the phase. The phase adjustment is to adjust the phase (sampling phase) of the timing for taking in the input signal so that a good gain can be stably obtained. This makes it possible to output a stable video with little flicker.

  Referring to FIG. 3, the projector apparatus according to the present embodiment includes a video / synchronization signal reception control unit 11, a video level detection unit 22, a detection result update unit 13, a detection result storage unit 14, a detection result read processing unit 15, and a position adjustment. An optimization processing unit 26, a phase control unit 27, a synchronization signal frequency counter unit 18, and a wait time calculation processing unit 19 are provided.

  The video / synchronization signal reception control unit 11, the synchronization signal frequency counter unit 18, and the wait time calculation processing unit 19 are the same as those in the first embodiment.

  The video level detection unit 22 detects the video level from the signal received by the video / synchronization signal reception control unit 11.

  The detection result storage unit 14 stores data of results detected by the video level detection unit 22.

  The detection result update unit 13 updates the data stored in the detection result storage unit 14 with the result detected by the video position detection unit 22 in synchronization with the vertical synchronization signal.

  The detection result read processing unit 15 reads the data stored in the detection result storage unit 14 a predetermined number of times with a set wait time, and sends the obtained data to the phase adjustment optimization unit 26. The wait time that determines the read timing is set by the wait time calculation processor 19.

  The synchronization signal frequency counter unit 18 detects the frequency (vertical frequency) of the signal received by the video / synchronization signal reception control unit 11.

  The phase adjustment optimization processing unit 26 determines whether or not the current phase is optimal based on the data read by the detection result read processing unit 15, and if it is not optimal, the phase control unit 27 sends another phase to the other phase. Direct change. The phase is adjusted by repeating this phase change and determination of whether or not it is optimal. For example, the phase with the maximum captured video level may be set as the optimum phase.

  The phase control unit 27 sets the phase in accordance with an instruction from the phase adjustment optimization processing unit 26.

  The wait time calculation processing unit 19 calculates the wait time from the frequency information detected by the synchronization signal frequency counter unit 18 and sets it in the detection result read processing unit 15. The calculated wait time is a value corresponding to the period of the input signal, and becomes longer when the frequency is lower and shorter when the frequency is higher. For example, a period may be obtained from frequency information and used as a wait time. Alternatively, a predetermined multiple of the cycle may be set as the wait time.

  As described above, according to the present embodiment, the wait time calculation processing unit 19 uses the vertical frequency information obtained by the synchronization signal frequency counter unit 18 to determine a wait time suitable for the input signal that is actually being received. Since the detection result readout processing unit 15 calculates the necessary time for the automatic adjustment from the detection result storage unit 14 after the wait time is calculated, an appropriate wait time is set according to the frequency of the input signal, and the data It can be prevented that reading takes longer than necessary. As a result, the projector device of this embodiment can reduce the time required for automatic adjustment.

  In addition, since the phase adjustment is control for finding the optimum phase, the setting and changing of the phase are repeated many times, and the effect of shortening the time is greater than the resolution adjustment.

  Further, if the settable phase width is small, it is necessary to increase the control frequency of phase adjustment in order to make the time required for adjustment the same. In order to increase the frequency, it is necessary to perform one control in a short time, and the time reduction according to the present embodiment is more effective.

  FIG. 4 is a block diagram showing the configuration of the projector apparatus according to the third embodiment. The third embodiment exemplifies a projector device that automatically adjusts the video level. The adjustment of the video level is to adjust the amplitude of the video signal so that the output video level is within a predetermined range. As a result, an image with appropriate brightness can be output.

  Referring to FIG. 4, the projector apparatus according to the present embodiment includes a video / synchronization signal reception control unit 11, a video level detection unit 22, a detection result update unit 13, a detection result storage unit 14, a detection result read processing unit 15, and a video level. An optimization processing unit 26, a video level control unit 27, a synchronization signal frequency counter unit 18, and a wait time calculation processing unit 19 are provided.

  The projector apparatus of this embodiment shown in FIG. 4 is the same as that shown in FIG. 3 in that the phase adjustment optimization processing unit 26 is replaced with a video level optimization processing unit 36 and the phase control unit 27 is replaced with a video level control unit 37. Different from the second embodiment shown.

  The video level optimization processing unit 36 determines whether or not the video level of the current output is optimal based on the data read by the detection result read processing unit 15. Instruct to change the level.

  The video level control unit 37 sets the output video level in accordance with an instruction from the video level optimization processing unit 36.

  According to the present embodiment, the time required for automatic adjustment of the video level can be shortened.

It is a block diagram which shows the structure of the projector apparatus by 1st Embodiment. It is a flowchart which shows operation | movement of the projector apparatus of 1st Embodiment. It is a block diagram which shows the structure of the projector apparatus by 2nd Embodiment. It is a block diagram which shows the structure of the projector apparatus by 3rd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Image | video / synchronization signal reception control part 12 Image | video position detection part 13 Detection result update part 14 Detection result memory | storage part 15 Detection result reading process part 16 Resolution calculation process part 17 Resolution setting process part 18 Synchronous signal frequency counter part 19 Wait time calculation process Unit 22 video level detection unit 26 phase adjustment optimization processing unit 27 phase control unit 36 video level optimization processing unit 37 video level control unit A1 to A5 steps

Claims (10)

A projector device that adjusts and outputs an image of an input signal,
A wait time calculation unit for calculating a wait time based on the vertical frequency of the input signal;
A detection result acquisition unit that acquires data detected from the input signal a plurality of times at intervals of the wait time calculated by the wait time calculation unit;
A projector apparatus comprising: an automatic adjustment unit that adjusts an image of the input signal based on data acquired by the detection result acquisition unit.   The projector apparatus according to claim 1, wherein the wait time calculation unit sets a period of the input signal as the wait time.   The projector device according to claim 1, wherein the detection result acquisition unit determines data to be used by the automatic adjustment unit based on the plurality of acquired data. The data is video position data,
The said automatic adjustment part calculates | requires the resolution of the image | video of the said input signal using the said image position and the frequency of the said input signal, and adjusts it to the predetermined | prescribed resolution for image | video output. The projector apparatus described in 1. The data is video level data,
5. The projector device according to claim 1, wherein the automatic adjustment unit adjusts a phase of a timing at which the input signal is captured so that the video level of the input is stabilized. 6. The data is video level data,
The projector device according to claim 1, wherein the automatic adjustment unit adjusts the gain of the video level so that the output video level is within a predetermined range.   2. The automatic adjustment unit obtains a start timing of image processing using a frequency of the input signal with reference to a synchronization signal of the input signal, and adjusts the image processing to start at the start timing. 7. The projector device according to any one of items 1 to 6. An image adjustment method for adjusting an image of an input signal by a projector device,
Calculating a wait time based on a vertical frequency of the input signal;
Obtaining data detected from the input signal a plurality of times at intervals of the wait time;
Adjusting the video of the input signal based on the acquired data.   The video adjustment method according to claim 8, wherein a period of the input signal is the wait time.   The video adjustment method according to claim 8 or 9, wherein data used for video adjustment of the input signal is determined based on a plurality of acquired data.

Images