JP3091496U - Television and video output devices - Google Patents

Abstract

(57) [Summary] [Problem] At the time of turning on the power, there is a problem that it may not be possible to realize the display of the video size according to the control data due to the temperature characteristics of the chroma IC. When a power supply is turned on, when a chroma IC transitions from a normal temperature state to an electrically heated high temperature state, a peak voltage of a vertical drive signal fluctuates due to a temperature characteristic of the chroma IC, thereby causing a vertical direction. Image size fluctuates. In such a case, the control data stored in the EEPROM is corrected to define the peak voltage. This makes it possible to correct the vertical fluctuation of the video size when the power is turned on.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

  The present invention relates to a television and a video output device, and more particularly to controlling a video size. The present invention relates to a television and a video output device for displaying the image.

[0002]

[Prior art]

  In a conventional television, the chroma IC generates a video signal and Based on the image signal, a horizontal drive signal and a vertical drive signal to form the image size. Generate a live signal. In such a case, the microcomputer can control this video size. The control data is read from the EEPROM and set in the chroma IC. , Based on this set control data, horizontal drive signal and vertical drive signal Generate a video signal and based on the above video signal, horizontal drive signal, and vertical drive signal. Based on that, the image is displayed. A similar technique is disclosed in Japanese Patent Laid-Open No. 10-49120. , JP-A-2000-224606 and JP-A-2001-358964. It is shown.

[0003]

[Problems to be solved by the device]

  In the above-mentioned conventional television, due to the temperature characteristics of the chroma IC, There is a problem that it may not be possible to display the image size of the control data. It was Further, among the latter publications, it is disclosed in JP 2001-358964 A. The technology uses a feedback signal that enables the microcomputer to detect the video size from the chroma IC. The video size is adjusted based on the same signal. But in this case The circuit configuration is complicated because a predetermined circuit for inputting the feedback signal is required. There was a problem. On the other hand, each of the other publications has a configuration different from that of the present invention and is substantially It is impossible to solve the above-mentioned fluctuation in image size due to the temperature characteristics of the chroma IC. Is.

[0004]   The present invention has been made in view of the above problems, and has a simple structure for temperature characteristics. TVs that are capable of compensating for changes in video size caused by And a video output device.

[0005]

[Means for Solving the Problems]

  In order to achieve the above object, a device according to claim 1 is based on a predetermined reception frequency. The tuner that receives the broadcast signal from the receiver and the broadcast signal received by the tuner. Control data that generates the image signal and specifies the input vertical image size The vertical drive signal that forms the vertical video size of the video signal based on The chroma IC that is generated and output, and the video signal and vertical drive that the chroma IC outputs. A CRT that displays an image based on a live signal, and an EE that stores the above control data The PROM and the above chroma IC are used to display an image based on the image signal on the CRT. At the same time, the control data is read out from the EEPROM And a microcomputer that outputs the control data to the chroma IC. The vertical drive signal generated by the chroma IC based on the control data. Issue is caused by the temperature change of the chroma IC when the power to the television is turned on. The above microcomputer can detect that the power to the television is turned on. In addition, the fluctuation of the vertical drive signal when the power is turned on can be almost eliminated. It is equipped with various correction levels in advance and detects the power-on of the television. In this case, the chroma IC is corrected while correcting the control data based on the correction degree. The chroma IC outputs the control data corrected by the microcomputer. Data and input the vertical drive signal based on the corrected control data. It is configured as a configuration.

[0006]   The television receives the broadcast signal at the tuner based on the specified reception frequency. , Generates a video signal from the broadcast signal received by the chroma IC, and Video signal based on the control data that specifies the vertical video size input from the The vertical drive signal that forms the vertical video size of the Output. The CRT uses the video signal and vertical drive signal output by the chroma IC. The image will be projected based on this. Here, the control data described above is EEPRO. It is stored in M, and the microcomputer projects the video based on the video signal from the chroma IC on the CRT. When sending out, read the control data from this EEPROM and read it The output control data is output to the chroma IC. And the chroma IC is A vertical drive signal is generated based on the control data, and a predetermined video size is formed. To display the image on the CRT.

[0007]   In the television having such a configuration, the control input from the microcomputer by the chroma IC The vertical drive signal generated based on the data is the power supply for the television. It changes due to the temperature change of the chroma IC at the time of charging. In this way, When the live signal fluctuates, the vertical direction of the image displayed on the CRT The image size fluctuates and the image quality deteriorates. Therefore, claim 1 configured as described above In this invention, the microcomputer turns on the power to the television. Enables detection, and gives a general idea of vertical drive signal fluctuations when the microcomputer is powered on. An erasable correction degree is provided in advance. Here, the microcomputer is the television When it is detected that the power is turned on, the control data is sent based on the above-mentioned correction degree. Outputs to the chroma IC while correcting. On the other hand, the chroma IC is corrected by the microcomputer. The control data that has been corrected is input, and fluctuations are corrected based on this corrected control data. To generate the vertical drive signal.

[0008]   With the configuration described above, the vertical direction generated due to the temperature characteristics of the chroma IC It is possible to correct the image size in the proper direction to an appropriate image size. Meanwhile, it takes The technical idea is limited to the specific equipment to which the technology is applied, that is, the television. However, it is possible to correct the fluctuation of the image size caused by the temperature characteristics. It goes without saying that it can be also realized as a video output device capable of

[0009]   Therefore, the invention according to claim 2 is a predetermined control in which an image by a video signal is input. Video output means for displaying in a video size that can be formed based on the data; The control data storage means for storing the control data and the temperature characteristics of the video output means When the above image size fluctuates due to this, it is prescribed in advance that this fluctuation can be almost eliminated. The control data stored in the control data storage means based on the correction degree Correcting control data correcting means and control corrected by the control data correcting means Data is output to the video output means, and the corrected control is output to the video output means. Correction control data output means for displaying the image in the image size based on the data And is configured to include.

[0010]   In the invention according to claim 2 configured as described above, the video output means is a video The image size that can be formed based on the predetermined control data that input the image by the signal Based on. This control data is stored in the control data storage means. It Here, the image size displayed by the image output means is the temperature of the image output means. It fluctuates due to the characteristics. In the present invention, in such a case, the control data correction At the stage, based on a pre-defined correction degree that can substantially eliminate this fluctuation, The control data stored in the data storage means is corrected. By the control data correction means The corrected control data is output to the image output means by the corrected control data output means. Is output. Then, when the video output means inputs the corrected control data, A video size is formed based on the control data and the video is displayed.

[0011]   As an example of the timing for correcting the control data by the control data correction means, The invention according to claim 3 is the video output apparatus according to claim 2, wherein the control device is The data correction means has a power-on detection means for detecting power-on of the video output device. If the power-on detecting means detects that the power is turned on, the control data above is supplemented. The configuration is correct.   In the invention according to claim 3 configured as described above, the control data correction means Is provided with a power-on detection means for detecting power-on of the video output device. this At this time, the control data correction means detects the power-on by this power-on detection means. In this case, the control data stored in the control data storage means is corrected.

[0012]   As an example of how the image size changes and an example of a correction method in such a case, The invention according to claim 4 is the video output device according to claim 3, wherein The image size that fluctuates due to the temperature characteristics of the input means is for a predetermined period after the power is turned on. While gradually converging to a normal image size at, the control data correction means, The control data is gradually increased based on the correction degree corresponding to the convergence in the same predetermined period. Is configured to correct.   In the invention according to claim 4 configured as described above, the temperature characteristic of the video output means is The video size that fluctuates due to the In the meantime, it gradually changes so as to converge to a normal image size. Therefore, control data The correction means compensates for the degree of convergence of fluctuations in the image size during this predetermined period. The control data is gradually corrected based on the correctness.

[0013]   As an example of a specific method for correcting the control data by the control data correction means, According to a fifth aspect of the invention, in the video output device according to the fourth aspect, the control is performed. The control data correction means calculates the control data based on the correction degree corresponding to the above convergence. It has a plurality of correction calculation means that can be output, and a predetermined correction calculation means is provided corresponding to the above convergence. When selecting and calculating the control data to be corrected based on the selected correction calculation means, In addition, the correction control data output means outputs the calculated control data to the video output. It is configured to output to the means.   In the invention according to claim 5 configured as described above, the control data correction means In addition, based on the correction degree that corresponds to the convergence of the fluctuations that occur in the image size, A plurality of correction calculation means capable of calculating the data are provided. This control data correction means Select and select a predetermined correction calculation method that corresponds to the convergence of fluctuations that occur in the image size of The control data to be corrected is calculated based on the selected correction calculation means. And correction system The data output means outputs the calculated control data to the video output means for correction. Display the selected video size.

[0014]   As another example of a concrete method for correcting the control data by the control data correction means, The invention according to claim 6 is the video output device according to claim 4, wherein The control data correction means is corrected based on the correction degree corresponding to the above convergence. It has a control data storage means for storing a plurality of control data in advance, and corresponds to the above convergence. Read out the predetermined control data from the control data storage means, and The data output means outputs the read control data to the video output means. It is as a configuration.   In the invention according to claim 6 configured as described above, the control data correction means The control data storage means provided to support the convergence of fluctuations in video size. A plurality of control data corrected based on the correction degree is stored in advance. control The data correction means responds to the convergence of fluctuations occurring in this image size by controlling the control data. Predetermined control data is read from the data storage means. And correction control data output means Outputs the read control data to the video output means, and Displayed.

[0015]   According to the above-mentioned invention, the temperature characteristic of the image output means at power-on is raised. It is possible to prevent the variation in the image size caused by this. Incentive for this fluctuation The temperature characteristic to be turned on is the characteristic when the temperature changes from low to high when the power is turned on. . Considering this point, it is assumed that the temperature is high immediately after the power is cut off. It is considered that the temperature characteristic that causes the above-mentioned fluctuation is small. Therefore, in claim 7, This invention is the video output device according to any one of claims 3 to 6. The power-off can be detected and the elapsed time from power-off to power-on The control data correction means has a time measuring means capable of measuring When the power supply is detected by the output means, the elapsed time measured by the same time measurement means If the same elapsed time is less than or equal to the predetermined elapsed time, the control data above is corrected. It is a structure that does not break.

[0016]   In the invention according to claim 7 configured as described above, in the video output device, , Power interruption can be detected, and the elapsed time from power interruption to power on A measurable time measuring means is provided. In such a case, the control data correction means When power-on is detected by the above-mentioned power-on detection means, this time measurement means Determine the measured elapsed time, and if the elapsed time is less than the specified elapsed time, Do not correct the data.

[0017]   In this way, whether the correction should be performed or not with the elapsed time from power shutdown as a threshold You may decide, but on the other hand, make corrections in consideration of the elapsed time from power shutdown. You can Therefore, the invention according to claim 8 includes the above-mentioned claims 3 to 6. In the video output device described in any of the above, it is possible to detect the power interruption and It has a time measuring means that can measure the elapsed time from the power interruption to the power on When the power-on detection means detects the power-on, the data correction means is operated at the same time. The elapsed time measured by the interval measuring means is determined, and the same elapsed time is less than or equal to the predetermined elapsed time. In the case of, the control data is corrected based on the degree of convergence that depends on the same elapsed time. It is configured to do so.   In the invention according to claim 8 configured as described above, in the video output device, It is possible to detect power interruptions and to measure the elapsed time from power interruption to power activation. A measurable time measuring means is provided. In such a case, the control data correction means is If the power-on detecting means detects that the power is turned on, this time measuring means When the measured elapsed time is determined and the same elapsed time is less than the specified elapsed time, the same elapsed time The control data is corrected based on the degree of convergence which depends on the interval.

[0018]   The invention according to claim 9 as an example of an image size that fluctuates due to temperature characteristics In the video output device according to any one of claims 2 to 8. The image size that fluctuates due to the temperature characteristics of the image output means is the vertical image size. In addition, the control data correction means is The control data is corrected.   In the invention according to claim 9 configured as described above, in the temperature of the image output means The video size that fluctuates due to the characteristics is the vertical video size. And then In that case, the control data correction means may use the control data for the vertical image size. To correct.

[0019]   As another example of the image size that fluctuates due to the temperature characteristic, the image size according to claim 10 may be used. According to another aspect of the invention, in the video output device according to any one of claims 2 to 8, The image size that fluctuates due to the temperature characteristics of the image output means is a horizontal image. In addition to the size, the control data correction means adjusts the image size in the same horizontal direction. The control data is corrected.   In the invention according to claim 10 configured as described above, the temperature of the image output means is increased. The image size that changes due to the degree characteristic is defined as the horizontal image size. And In such a case, the control data correction means may use the control data for the horizontal image size. Correct the data.

[0020]

[Effect of device]

  As described above, according to the first aspect of the invention, the black structure is simplified. The vertical variation of the image size caused by the temperature characteristics of the IC is corrected. A television capable of operating can be provided.   According to the second aspect of the invention, the temperature of the image output means is adjusted by a simple method. Video output device that can correct fluctuations in video size that occur due to Can be provided.   Further, according to the invention of claim 3, a video image that is likely to occur when the power is turned on. It becomes possible to suppress the fluctuation of the gap.   Further, according to the invention of claim 4, it is possible to perform the correction corresponding to the convergence of the fluctuation. And become possible.   Further, according to the invention of claim 5, the control data is corrected by using the calculation. You can   Further, according to the invention of claim 6, the correction control data stored in advance is stored. The correction can be performed by the data.   Further, according to the invention as claimed in claim 7, when the power is cut off and the power is turned on. If the interval is a predetermined time, it can be considered that no correction is necessary.   Further, according to the invention of claim 8, when the power is cut off and the power is turned on, It becomes possible to perform correction control corresponding to the time.   Further, according to the invention of claim 9, an example of a changing video size is presented. You can   Further, according to the invention of claim 10, another example of the changing video size is given. Can be presented.

[0021]

[Embodiment of device]

  Here, an embodiment of the present invention will be described in the following order. (1) Configuration of television: (2) Processing contents of control data correction processing: (3) Summary:

[0022]   (1) Configuration of television:   FIG. 1 is a block diagram showing a configuration of a television according to an embodiment of the present invention. It is a figure. FIG. 2 shows the internal structure of the chroma IC arranged in this television. 3 is an internal configuration diagram showing FIG. In the figure, a television 100 has a microcomputer 10 The microcomputer 10 includes a tuner IC 20, a chroma IC 30, and an EEP. The ROM 40 is connected to the ROM 40 via an IIC bus (not shown), and an operation panel A remote control device 70 is directly connected to the microcomputer 10. Servant Therefore, the microcomputer 10 is performed by the operation panel 50 or the remote controller 70. It accepts various operations and controls the television 100 based on those operations. It Further, the tuner IC 20 is connected to the antenna 21 and the chroma IC 30. Has been.

[0023]   Here, the chroma IC 30 is connected to the audio amplifier 63 and the deflection circuit 65. On-screen display (OSD) in the microcomputer 10 A cathode amplifier 61 is connected via the path 15. CRT62 is a deflection coil And the cathode amplifier 61 and the flyback transformer ( FBT) 67 and can display a screen. In addition, The speaker 64 is connected to the audio amplifier 63 and can output voice. Has become. Then, the microcomputer 10 controls the entire television 100. Has realized the function as a television.

[0024]   The tuner IC 20 is a so-called frequency synthesizer type tuner. Equipped with a high-frequency amplifier circuit, local oscillator circuit, mixing circuit, etc. . Of course, setting the tuner to the frequency synthesizer system is only an example. Alternatively, a voltage synthesizer system may be used. The high frequency amplifier circuit is a bandpass filter Based on the control of the microcomputer 10, the The broadcast radio wave corresponding to the desired frequency is received through the filter, amplified, and Issue. The frequency of this high-frequency signal is the same as the broadcast signal of the selected broadcast. Is a number. The high frequency amplifier circuit outputs the generated high frequency signal to the mixing circuit.

[0025]   The local oscillator circuit is a PLL (Phase Locked Loop) circuit. This PLL circuit is used to generate local signals that correspond to the desired frequency of broadcast radio waves. It generates a local oscillation signal of the oscillation frequency and outputs it to the mixing circuit. Mixing circuit increases high frequency Intermediate frequency signal by mixing the output from the width circuit and the local oscillation signal from the local oscillation circuit (IF) and output to the chroma IC 30. At that time, the intermediate frequency signal is SAW It may be passed through a filter and then output to the chroma IC. High-frequency amplifier circuit , Local oscillator circuit, and mixing circuit are used for various televisions that have been conventionally adopted. Circuitry can be applied.

[0026]   Next, the internal structure of the chroma IC 30 will be described. Chroma IC30 is The intermediate frequency amplification (VIF) circuit 31 connected to the IC 20 and the microcomputer 10. A VCO (Voltage Control) connected to a crystal oscillator circuit (not shown) ed Oscillator) circuit 32, VCO circuit 32 and VIF circuit 31 The connected detection circuit 33, the synchronization circuit 34 connected to the detection circuit 33, and the detection circuit And a video signal amplifier circuit 35 connected to the path 33. In addition, this VIF times Path 31, VCO circuit 32, detection circuit 33, synchronization circuit 34, video signal amplification circuit 35 Can apply various television circuits that have been adopted in the past It

[0027]   The VIF circuit 31 converts the intermediate frequency signal output from the tuner IC 20 into an intermediate frequency signal. The signal is amplified and output to the detection circuit 33. The VCO circuit 32 is input from the crystal oscillator circuit. Oscillates the oscillation signal based on the reference oscillation signal that is Accordingly, it is possible to change the oscillation frequency of the oscillation signal. Here, the microcomputer 10 The VCO frequency so that the oscillating frequency corresponds to the type of broadcast radio wave received. It controls the voltage input to path 32. The detection circuit 33 determines the oscillation frequency of the oscillation signal. Based on the number, the intermediate frequency signal amplified by the intermediate frequency signal in the VIF circuit 31 is detected. It outputs a video signal and an audio signal. More specifically, the detection circuit 33 is Video detection from the amplified intermediate frequency signal in synchronization with the oscillation frequency of the oscillation signal Then, a predetermined color demodulation process is performed and the video signal is separated and output to the outside.

[0028]   The video signal amplification circuit 35 is a luminance signal of the video signals obtained by the detection circuit 33. Is amplified to the size required to operate CRT62. This video signal amplification The circuit 35 amplifies the video signal and adds the video signal to the cathode amplifier 61 at the same time. In addition, it is also distributed for synchronization separation and band amplification. For audio signals, The second audio intermediate by mixing the audio component and the oscillating signal in the wave-amplified intermediate frequency signal A frequency signal is generated and FM detection is performed to generate a voice signal, which is output to the outside. further, The detection circuit 33 detects horizontal / vertical synchronization based on the oscillation frequency of the oscillation signal during the detection process. A signal (SYNC) is also generated and output to the synchronization circuit 34. The synchronization circuit 34 is A sawtooth-shaped horizontal / vertical drive signal is generated based on the horizontal / vertical sync signal. And outputs to a deflection circuit 65 including a horizontal deflection circuit and a vertical deflection circuit. , Depending on the presence / absence of the input horizontal / vertical sync signal, the broadcast signal is Then, there is no receiving station) or there is a signal (that is, there is a receiving station) SD signal (station detect signal) that can determine whether or not Output to 10.

[0029]   The video signal output from the video signal amplifying circuit 35 is cascaded through the OSD circuit 15. It is output to the cathode amplifier 61 and amplified by the cathode amplifier 61 to produce a CRT 62. Is supplied to. Then, the CRT 62 displays the screen based on the amplified video signal. I do. On the other hand, the audio signal is output to the audio amplifier 63, and this audio signal is output. It is amplified by the dio amplifier 63 and supplied to the speaker 64. And the speaker 6 4 outputs a sound based on the amplified sound signal.

[0030]   The deflection circuit 65 generates a predetermined beam current corresponding to the horizontal / vertical drive signals. And supplies it to the deflection coil 66 attached to the CRT 62. The deflection coil 66 An electron beam based on this beam current is driven horizontally and vertically on the CRT 62. Let Further, the high frequency signal generated in the deflection circuit 65 is supplied to the FBT 67 and CR The high voltage supplied to T62 is generated. As a result, with CRT62 Is emitted while the electron beam corresponding to the video signal is driven, and the tube of CRT62 The image will appear on the surface.

[0031]   The EEPROM 40 is a readable / writable 1 kbit, that is, 128 bytes of nonvolatile memory. It is a memory of origin. This EEPROM 40 has a channel for the tuner IC 20. In addition to preset data of channels, setting of image quality parameters such as contrast and brightness Data, destination data such as for America or Japan, and audio output in stereo Required for the above control, such as data that determines whether or not there is data and data that determines the model A plurality of various types of data are stored.

[0032]   The microcomputer 10 includes a CPU 11, a ROM 12, a RAM 13, and an I / O port. 14, an OSD circuit 15, an A / D port 16, a timer circuit (not shown), etc. I have it. The I / O port 14 has a tuner IC 20, a chroma IC 30, The operation panel 50 and the remote controller are connected. In addition, the OSD circuit 15 includes As described above, the chroma IC 30 and the cathode amplifier 61 are connected. Then, the CPU 11 loads the predetermined program stored in the ROM 12 into the RAM 13 Run as a work area and control the entire television 100 as described above I do.

[0033]   Here, the vertical drive signal generated by the chroma IC 30 and output to the deflection circuit 65. Are formed in a sawtooth shape having a predetermined peak voltage. Such vertical dry FIG. 3 shows the configuration of the sub signal. In the figure, the peak voltage P of this vertical drive signal Are formed under the control of the microcomputer 10. Define this peak voltage P The control data to be stored is previously stored in the EEPROM 40, and the microcomputer 10 When the power of the television 100 is turned on, the control stored in the EEPROM 40 The data is read and set in the synchronization circuit 34 of the chroma IC 30. Then Ku The synchronization circuit 34 of the Roma IC 30 uses the set control data to set the wave height. The deflection circuit 6 generates a sawtooth-shaped vertical drive signal while specifying the voltage P. 5 will be output.

[0034]   The sawtooth shape of this vertical drive signal is the synchronization circuit 34 of the chroma IC 30, Alternatively, a predetermined capacitor provided in the connection path between the chroma IC 30 and the deflection circuit 65 may be used. It is formed by repeatedly charging and discharging the sensor. Meanwhile, this condenser Has a temperature characteristic that the capacity changes with changes in ambient temperature. Depending on the change in the ambient temperature, the charging / discharging mode may change. This When the charging / discharging mode changes, the peak voltage P of the vertical drive signal rises and falls. Fluctuates. The peak voltage P is the vertical direction of the raster screen displayed on the CRT 62. Since it defines the image width, if fluctuations in the peak voltage P occur, the raster -Problem that the screen expands and contracts in the vertical direction and the image quality of the image deteriorates There is. As an example of a situation in which such a temperature characteristic appears, the television 100 When the power is turned on is taken into consideration.

[0035]   When the television 100 is turned on, the above-mentioned condenser is in a normal temperature state. Is electrically heated from the state to a high temperature state. Originally, the condenser It is desirable to have temperature characteristics that can form the high voltage P in both normal temperature and high temperature. Get caught However, as shown in FIG. 4, in the normal temperature state, the voltage is slightly stepped down below the peak voltage P. Generated peak voltage P1 gradually approaches the peak voltage P, and the capacitor gradually When it gets warm and high temperature, the vertical drive signal can be generated by the peak voltage P There is also a capacitor having the following temperature characteristics. A capacitor with such temperature characteristics In the case of a sensor, the raster screen displayed on the CRT 62 changes as shown in Fig. 5. To do. In the figure, the raster screen R1 shows the normal temperature condition when the power is turned on. Formed based on the vertical drive signal that is formed by repeated charging and discharging at the capacitor The raster screen R2 is a screen that has been charged and discharged with a high temperature condenser. It is a screen formed based on a vertical drive signal which is repeatedly formed.

[0036]   In such a case, the vertical image width of the raster screen R1 is formed as the image width h1. The image width of the raster screen R2 in the vertical direction is formed by the image width H. Therefore, The video width h1 in the vertical direction corresponding to the transition from the normal temperature state of the capacitor to the high temperature state To the video width H. Where the vertical image size and condenser The time change of temperature is shown in FIG. In the figure, the vertical axis represents the image size in the vertical direction. The temperature of the condenser is specified, and the time is specified on the horizontal axis. Also, the time is "0" It indicates that the power was turned on at the time. In the figure, the temperature of the condenser Changes from the normal temperature state t1 to the high temperature state T in about 5 minutes after the power is turned on. It

[0037]   The vertical image size changes from the normal temperature state t1 to the high temperature state T. Corresponding to, the transition from video width h1 to video width H takes about 5 minutes after the power is turned on. To do. This vertical image size is adjusted by the microcomputer 10 as described above. Vertical drive signal generated based on the control data set in the ROMA IC 30 Is defined by the peak voltage P of That is, for 5 minutes after turning on the power, Even if the control data capable of forming the pressure P is set in the chroma IC 30, the peak voltage Since P is not formed, such reduction of the image width occurs. Where control data and The relationship with the peak voltage P is shown in the schematic diagram of FIG. In the figure, the solid line L1 indicates a high temperature state. Shows the relationship between the control data and the peak voltage, and the wavy line L2 indicates the normal temperature when the power is turned on. The relationship between the control data and the peak voltage in the state is shown.

[0038]   Normally, the control data is set in the chroma IC 30 with reference to the solid line L1 in the high temperature state. To be Therefore, the control data D1 is set, and the peak voltage P is formed at this time. Be done. On the other hand, in the normal temperature state, the relationship of the wavy line L2 causes the control data D1 to be When set in the IC 30, a peak voltage P1 is formed. Therefore, in normal temperature In order to form the peak voltage P by applying the control data D1 'to the chroma IC 30, I know that I need to Therefore, in the present embodiment, whether after power-on For about 5 minutes, increase the control data that the microcomputer 10 sets in the chroma IC 30 By correcting the direction, the peak voltage P is formed and the image width is reduced. It is possible to suppress and improve the image quality.

[0039]   Here, when correcting the control data within about 5 minutes after the power is turned on, , The change in the vertical image size for about 5 minutes after the power is turned on is modeled in advance. Need to be converted. In this embodiment, the video image in the vertical direction is turned on after the power is turned on. After the power is turned on, the power consumption is reduced to about 95% and recovered to about 96% within 1 minute after the power is turned on. It recovered to about 97% in 2 minutes, and recovered to about 98% in 3 minutes after the power was turned on. Recovered to about 99% in 4 minutes after turning on the power, and 100% in 5 minutes after turning on the power. Let the model converge to. Then, according to this model, the correction model of the control data is Control data correction to be described later by the microcomputer 10 according to this correction model. The control data is corrected by executing the process. Note that the vertical projection Image size variation model and control data correction model are limited to those described above However, it can be appropriately changed according to the temperature characteristics of the capacitor.

[0040]   FIG. 8 is a schematic diagram showing a control data correction model. In the figure, correction The model M defines control data on the vertical axis and time on the horizontal axis. And In the correction model M, when the time is “0”, that is, one minute has elapsed since the power was turned on. In the meantime, control data D1 is multiplied by 1.05 to be corrected, and 1 minute to 2 minutes have elapsed. In the meantime, the control data D1 is multiplied by 1.04 and corrected, and 2 to 3 minutes have passed. In the meantime, control data D1 is multiplied by 1.03 and corrected, and 3 to 4 minutes have passed. In the meantime, the control data D1 is multiplied by 1.02 and corrected, and 4 to 5 minutes have passed. Control data D1 is multiplied by 1.01 for correction while Set to data D1. As a result, the above-mentioned fluctuations in each time period will occur. The image size in the vertical direction is corrected to be approximately 100%, and is shown in FIG. The raster screen R1 displayed on the CRT 62 when the power is turned on and at each time Will be corrected to a raster screen R1 'equivalent to the raster screen R2.

[0041]   (2) Processing contents of control data correction processing:   FIG. 10 shows control executed by the microcomputer 10 based on the correction model M described above. 6 is a flowchart showing the processing contents of data correction processing. In the figure, the power supply When the input is detected (step S100), the control stored in the EEPROM 40 is The control data D1 is acquired (step S105). When the control data D1 is acquired, The corrected control data D2 is calculated by multiplying the control data D1 by 1.05. Is calculated (step S110). Then, the calculated control data D2 is The vertical drive signal having a substantially high voltage P is formed on the IC An image is formed in which the image width in the vertical direction is approximately the image width H (step S115). ). When 1 minute has passed since the control data D2 was set in the chroma IC 30 ( (Step S120), the control data D1 is multiplied by 1.04 and corrected. The control data D3 is calculated (step S125).

[0042]   Then, the calculated control data D3 is set in the chroma IC 30, and the voltage A vertical drive signal having a pressure P is formed, and the vertical video width is formed into a substantially video width H. The formed image is displayed (step S130). Control data D3 to chroma IC If 1 minute has elapsed after setting to 30 (step S135), the control data D 1 is multiplied by 1.03 to calculate the corrected control data D4 (step S140). Then, the calculated control data D4 is set in the chroma IC 30. To form a vertical drive signal having a substantially high voltage P, and the vertical image width is An image formed with a substantially image width H is displayed (step S145). Control data D When 1 minute has elapsed after setting 4 to the chroma IC 30 (step S150) , The control data D1 is multiplied by 1.02 to obtain the corrected control data D5. Calculate (step S155).

[0043]   Then, this calculated control data D5 is set in the chroma IC 30 and the A vertical drive signal having a pressure P is formed, and the vertical video width is formed into a substantially video width H. The formed image is displayed (step S160). Control data D5 for chroma IC If 1 minute has elapsed after setting to 30 (step S165), the control data D 1 is multiplied by 1.01 to calculate the corrected control data D6 (step S170). Then, the calculated control data D6 is set in the chroma IC 30. To form a vertical drive signal having a substantially high voltage P, and the vertical image width is An image formed with a substantially image width H is displayed (step S175). Control data D When 1 minute has elapsed after setting 6 in the chroma IC 30 (step S180) , Control data D1 is set in the chroma IC 30, and vertical dry with the peak voltage P And a video signal having a vertical video width of the video width H is displayed. (Step S185).

[0044]   In the above-described embodiment, the calculation corresponding to the predetermined correction model M is performed. Using the control data D1, the corrected control data D2 to D6 are calculated and acquired as appropriate. Adopted the configuration. Of course, the method of acquiring the corrected control data D2 to D6 is However, the present invention is not limited to this, and as shown in FIG. The control data D2 to D6 corrected based on the The configuration may be such that the microcomputer 10 reads the data.

[0045]   FIG. 12 shows the corrected control data D2 to D6 stored in advance in the EEPROM 40. The processing contents of the control data correction processing executed by the microcomputer 10 using It is a flowchart. In the figure, when power-on is detected (step S20 0), obtain the control data D2 stored in the EEPROM 40 (step S210). Then, the obtained control data D2 is set in the chroma IC 30. , A vertical drive signal having a substantially wave high voltage P is formed, and the vertical image width is substantially projected. The image formed with the image width H is displayed (step S215). Control data D2 If one minute has passed since the camera was set in the chroma IC 30 (step S220), E The control data D3 stored in the EPROM 40 is acquired (step S225). ).

[0046]   Then, the obtained control data D3 is set in the chroma IC 30 and the voltage A vertical drive signal having a pressure P is formed, and the vertical video width is formed into a substantially video width H. The formed image is displayed (step S230). Control data D3 to chroma IC If 1 minute has elapsed after the setting to 30 (step S235), the EEPROM The control data D4 stored in 40 is acquired (step S140). And , The acquired control data D4 is set in the chroma IC 30 and the substantially high wave voltage P And a vertical drive signal is generated, and the vertical image width is formed to be substantially the image width H. The image is displayed (step S245). The control data D4 is transferred to the chroma IC 30. If one minute has elapsed after the setting (step S250), the EEPROM 40 is updated. The control data D5 stored in the storage 40 is acquired (step S255).

[0047]   Then, the obtained control data D5 is set in the chroma IC 30 and the voltage A vertical drive signal having a pressure P is formed, and the vertical video width is formed into a substantially video width H. The formed image is displayed (step S260). Control data D5 for chroma IC If 1 minute has elapsed after the setting to 30 (step S265), the EEPROM The control data D6 stored in 40 is acquired (step S170). And , The obtained control data D6 is set in the chroma IC 30 and the substantially high wave voltage P And a vertical drive signal is generated, and the vertical image width is formed to be substantially the image width H. The image is displayed (step S275). The control data D6 is transferred to the chroma IC 30. If one minute has elapsed after the setting (step S280), the EEPROM 40 is updated. The stored control data D1 is obtained (step S285), and the obtained control is obtained. Vertical drive signal with peak voltage P by setting data D1 in chroma IC 30 Is formed, and an image formed with an image width H in the vertical direction is displayed (step S290).

[0048]   In the embodiment described above, the control data for correcting the control data when the power is turned on. The correction process was executed. This is from the normal temperature state before turning on the power to the high temperature state after turning on the power. This is to correspond to the temperature characteristic of the chroma IC 30 that occurs when the transition occurs to. one On the other hand, when the power is turned on and is operating, the power is shut off and then turned on again. As shown in FIG. 13, the temperature of the chroma IC 30 may change depending on the elapsed time after the power is cut off. In some cases, the temperature does not drop to the normal temperature state t1 described above. At this time, in the vertical direction The variation degree of the image size of is different from that of the correction model M described above. There Then, the control data is corrected in consideration of the elapsed time from power-off to power-on. You can do it.

[0049]   FIG. 14 shows the processing of the control data correction processing executed by the microcomputer 10 in such a case. It is the flowchart which showed the contents of a reason. In the figure, when power-on is detected ( Step S300), is the elapsed time from power-off to power-on more than 5 minutes? It is determined whether or not (step S305). If more than 5 minutes have passed, control data Set the D2 to the chroma IC 30 and apply the vertical drive signal having the substantially high voltage P. And a video image having a vertical video width of approximately the video width H is projected (step S310). One minute has passed since the control data D2 was set in the chroma IC 30. If it does (step S315), or if the time from power-off to power-on has elapsed When the interval is 4 minutes or more and less than 5 minutes (step S320), the control data D3 is clicked. Set on the Roma IC30 to form a vertical drive signal having a substantially wave high voltage P, An image having a substantially vertical image width H is projected (step S32). 5).

[0050]   If one minute has passed since the control data D3 was set in the chroma IC 30 (step S330), or the elapsed time from power-off to power-on is 3 minutes or more 4 If it is less than the minute (step S335), the control data D4 is transferred to the chroma IC 30. Vertical video signal which is set and forms a vertical drive signal having a substantially high voltage P An image having a width substantially equal to the image width H is displayed (step S340). Control day If one minute has passed since the camera D4 was set in the chroma IC 30 (step S34 5) Or, the elapsed time from power-off to power-on is 2 minutes or more and less than 3 minutes If it does (step S350), set the control data D5 in the chroma IC 30 and A vertical drive signal having an approximately wave high voltage P is formed, and an image width in the vertical direction is approximately an image. The image formed in the width H is displayed (step S355).

[0051]   When 1 minute has elapsed after the control data D5 was set in the chroma IC 30 (step (Step S360), or the elapsed time from power-off to power-on is 1 minute or more 2 If it is less than the minute (step S365), the control data D6 is sent to the chroma IC 30. Vertical video signal which is set and forms a vertical drive signal having a substantially high voltage P An image having a width substantially equal to the image width H is displayed (step S370). Control day If one minute has elapsed after setting the D6 on the chroma IC 30 (step S37) 5) Or, the elapsed time from power-off to power-on is 0 minutes or more and less than 1 minute If the control data D1 is set to the chroma IC 30, the peak voltage P Direct drive signal is formed, and the image with the vertical image width formed to the image width H is displayed. It is output (step S380).

[0052]   Of course, by not considering the elapsed time from power-off to power-on, The control data correction process may be simplified. Figure 15 shows this simplified system. 7 is a flowchart showing the processing content of control data correction processing. In the figure, When power-on is detected (step S400), the process from power-off to power-on It is determined whether the time is 5 minutes or more. If 5 minutes or more have elapsed, the normal temperature state is reached. Assuming that the time is t1, the control data correction process described above is executed (step S 410). On the other hand, if the elapsed time from power off to power on is less than 5 minutes , It is regarded as a high temperature state, and the control data correction process is not executed. If so, first Then, the control data D1 is set in the chroma IC 30. Embodiments described above In V., correct the vertical drive signal that defines the vertical image size. The method of correcting an image has been described above. However, depending on the temperature characteristics of the condenser, The image size that fluctuates in the horizontal direction is not limited to the vertical direction. Variations in size are also taken into consideration. Therefore, the control data correction process described above should be performed horizontally. It can be applied to the process of correcting the control data that defines the image size Needless to say.

[0053]   (3) Summary:   In this way, the crest voltage of the vertical drive signal is generated when the power is turned on. Transition from normal temperature state to high temperature state at power-on by correcting the control data The vertical image that changes depending on the temperature characteristics of the chroma IC 30 It is possible to correct the fluctuation of the image size.

[Brief description of drawings]

FIG. 1 is a block configuration diagram showing a configuration of a television according to an embodiment of the present invention.

FIG. 2 is an internal configuration diagram showing an internal configuration of a chroma IC arranged in a television.

FIG. 3 is a configuration diagram showing a configuration of a vertical drive signal.

FIG. 4 is a diagram showing a state of a vertical drive signal that varies depending on temperature characteristics of a capacitor.

FIG. 5 is a diagram showing a state of an image that changes according to a change in a vertical drive signal.

FIG. 6 is a diagram showing a relationship between image size, temperature, and time.

FIG. 7 is a diagram showing a relationship between control data and peak voltage.

FIG. 8 is a diagram showing a correction model of control data.

FIG. 9 is a diagram showing a state of a corrected image.

FIG. 10 is a flowchart showing the processing contents of control data correction processing.

FIG. 11 is a diagram showing a configuration of control data stored in an EEPROM.

FIG. 12 is a flowchart showing the processing contents of control data correction processing.

FIG. 13 is a diagram showing a relationship between turning on of the power supply and temperature.

FIG. 14 is a flowchart showing the contents of control data correction processing.

FIG. 15 is a flowchart showing the processing contents of control data correction processing.

[Explanation of symbols]

10 ... Microcomputer 11 ... CPU 12 ... ROM 13 ... RAM 14 ... I / O port 15 ... OSD 16 ... A / D port 20 ... Tuner IC 21 ... Antenna 30 ... Chroma IC 40 ... EEPROM 50 ... Operation panel 61 ... Cathode amplifier 62 ... CRT 63 ... Audio amplifier 64 ... speaker 65 ... Deflection circuit 66 ... Deflection coil 67 ... FBT 70 ... Remote control device

Claims (10)

[Scope of utility model registration request] 1. A tuner for receiving a broadcast signal based on a predetermined reception frequency, and a control data for generating a video signal from the broadcast signal received by the tuner and inputting control data for defining a vertical video size. A chroma IC that generates and outputs a vertical drive signal that forms a vertical video size of the video signal, a CRT that projects a video based on the video signal and the vertical drive signal output by the chroma IC, and EEPR for storing control data
OM and the above-mentioned chroma IC make C the picture which is based on the picture signal
In a television including a microcomputer that reads out the control data from the EEPROM and outputs the read control data to the chroma IC when the image is displayed on the RT, the chroma IC is generated based on the control data. The vertical drive signal fluctuates due to the temperature change of the chroma IC when the power of the television is turned on, and the microcomputer can detect the power of the television and the vertical drive signal when the power is turned on. A correction degree capable of substantially canceling the fluctuation of the signal is provided in advance, and when the power-on of the television is detected, the control data is corrected based on the correction degree and is output to the chroma IC. Chroma IC is control corrected by the above microcomputer Enter the over data, based on the corrected control data, television and generates the vertical drive signal. 2. A video output unit for displaying a video image of a video signal in a video size that can be formed based on predetermined control data input thereto, a control data storage unit for storing the control data, and a temperature of the video output unit. When the image size changes due to the characteristics, control data correction means for correcting the control data stored in the control data storage means based on a predetermined correction degree that can substantially eliminate the change, Correction control data output means for outputting the control data corrected by the control data correction means to the video output means and displaying the video at the video output means with a video size based on the corrected control data. A video output device comprising. 3. The control data correction means has power-on detection means for detecting power-on of the video output device,
When power-on is detected by the power-on detection means,
The video output device according to claim 2, wherein the control data is corrected. 4. The image size that changes due to the temperature characteristic of the image output means gradually converges to a normal image size in a predetermined period after the power is turned on, and the control data correction means is the same. The image output device according to claim 3, wherein the control data is gradually corrected based on a correction degree corresponding to the convergence in a predetermined period. 5. The control data correction means has a plurality of correction calculation means capable of calculating control data based on a correction degree corresponding to the convergence, and selects a predetermined correction calculation means corresponding to the convergence. The control data to be corrected is calculated based on the selected correction calculation means, and the correction control data output means outputs the calculated control data to the video output means. Four
The video output device described in. 6. The control data correction means includes control data storage means for storing in advance a plurality of control data corrected based on a correction degree corresponding to the convergence, and the control data correction means corresponding to the convergence. 5. The video output device according to claim 4, wherein the correction control data output means outputs the control data read out to the video output means while reading out predetermined control data from the storage means. 7. A power supply cut-off can be detected, and a time measuring means capable of measuring an elapsed time from power-off to power-on is provided, and the control data correction means is turned on by the power-on detection means. 4. When the above is detected, the elapsed time measured by the same time measuring means is determined, and when the same elapsed time is less than or equal to a predetermined elapsed time, the control data is not corrected. ~ The video output device according to claim 6. 8. A power supply cut-off can be detected, and a time measuring means capable of measuring an elapsed time from power-off to power-on is provided, and the control data correction means is turned on by the power-on detection means. Is detected, the elapsed time measured by the same time measuring means is determined, and if the same elapsed time is less than or equal to a predetermined elapsed time, the control data is corrected based on the degree of convergence depending on the same elapsed time. The video output device according to any one of claims 3 to 6, characterized in that. 9. The image size that fluctuates due to the temperature characteristic of the image output unit is a vertical image size, and the control data correction unit corrects control data for the vertical image size. The video output device according to any one of claims 2 to 8, characterized in that. 10. The image size fluctuating due to the temperature characteristic of the image output unit is a horizontal image size, and the control data correction unit corrects the control data for the horizontal image size. The video output device according to any one of claims 2 to 8, characterized in that.