JP3087494U - television - Google Patents

Abstract

(57) [Summary] (with correction) [PROBLEMS] To use a high-speed optical sensor or to change a remote controller, it is necessary to change the filter characteristics of an external circuit. And it was complicated. SOLUTION: A data decoder circuit 1 having a chroma IC capable of receiving an infrared blink signal on which serial data output from a computer 11 is superimposed, and decoding the serial data on a chroma IC 12f.
By executing at 2f8, the microcomputer 12b can be prevented from intervening in the decoding process, and the white balance adjustment process can be speeded up. Further, a filter circuit is mounted on the light receiving circuit 12f7, and the filter characteristics of the filter circuit can be changed, so that the remote control signal light receiving unit and the factory signal light receiving unit 120 can be used in common to form a common light receiving unit. Therefore, the device can be simplified.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a television, and more particularly, to a television that receives a wireless signal such as an infrared blinking signal and executes a predetermined operation according to the wireless signal.

[0002]

[Prior art]

 Conventionally, in this type of television, when an element for receiving a radio signal is connected to a signal input terminal of a microcomputer, an amplification circuit for amplifying the radio signal, a filter circuit, and a waveform shaping circuit are interposed as external circuits. . Then, the microcomputer controls the operation of the tuner IC and the chroma IC based on the decoded content while decoding the wireless signal input from the signal input terminal to which the external circuit is connected. On the other hand, data for factory adjustment was fetched from the IIC bus via a serial connector, and the fetched data was decoded by a microcomputer while controlling the operation during adjustment. Further, as a television of the same kind, a television disclosed in Japanese Utility Model Laid-Open No. 5-40619 is known.

[0003]

[Problems to be solved by the invention]

 In the above-mentioned conventional television, when it is desired to use a high-speed optical sensor or when the remote controller changes, it is necessary to change the filter characteristics of the external circuit, and it is necessary to replace the external circuit each time. It was complicated. Also, when data was imported during factory adjustments, a cable had to be connected to the serial connector, which required labor.

[0004] The present invention has been made in view of the above problems, and it is possible to easily change a filter characteristic according to the specification of a radio signal to be received, and to combine a radio signal having a different frequency band with a signal for factory adjustment. It is intended to provide a television capable of receiving a television.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the invention according to claim 1 includes a high frequency amplifier circuit for receiving, amplifying and outputting a radio wave corresponding to a desired frequency, and a local oscillation frequency corresponding to a desired frequency of the broadcast radio wave. And a local oscillation circuit that generates and outputs a local oscillation signal of the same frequency using a PLL circuit, and a local oscillation signal from the local oscillation circuit mixed with the output from the high-frequency amplification circuit to convert it to an intermediate frequency signal. A tuner IC having a mixing circuit that outputs a signal, a variable filter circuit that changes a frequency band of the output intermediate frequency signal and passes a predetermined band of the intermediate frequency signal, An intermediate frequency amplifying circuit for amplifying, a VCO circuit that oscillates the oscillation signal and can change the oscillation frequency of the oscillation signal, and a VCO circuit based on the oscillation frequency of the oscillation signal. Connected to the tuner IC and the chroma IC via an IIC bus, and a chroma IC having a detector circuit for detecting the intermediate frequency signal amplified by the intermediate frequency amplifier circuit and outputting a video signal and an audio signal. In addition, in a television including a tuner IC and a microcomputer for controlling the operation of the chroma IC, the chroma IC is connected to a light receiving element capable of inputting an infrared blinking signal sent from the outside. And an amplifier circuit for amplifying the infrared flicker signal input to the light receiving element to generate an internal signal, and a filter circuit for extracting and passing a predetermined frequency band of the internal signal amplified by the amplifier circuit. , A waveform shaping circuit that shapes the waveform of the internal signal that has passed through the filter circuit, and an internal No. and a decoding circuit for decoding, said microcontrollers is a configuration capable of executing a variable control for changing the predetermined frequency band which the filter circuit is extracted with the above chroma IC.

Conventionally, in a television, a broadcast radio wave corresponding to a desired frequency is received, amplified, and output by a high-frequency amplifier circuit of a tuner IC. In the local oscillation circuit, a local oscillation signal having a local oscillation frequency corresponding to a desired frequency of a broadcast wave is generated and output by a PLL circuit. The mixing circuit mixes the local oscillation signal from the local oscillation circuit with the output from the high-frequency amplification circuit, converts it to an intermediate frequency signal, and outputs the same intermediate frequency signal.The variable filter circuit outputs the frequency of the output intermediate frequency signal. The band is changed and a predetermined band of the same intermediate frequency signal is passed.

[0007] Then, the intermediate frequency signal passed through the above-described variable filter circuit is amplified by the intermediate frequency amplifier circuit of the chroma IC, and the VCO circuit oscillates while changing the oscillation frequency of the oscillation signal. Then, based on the oscillation frequency of the oscillation signal, the intermediate frequency signal amplified by the intermediate frequency amplifier circuit is detected, and a video signal and an audio signal are output. Further, the microcomputer is connected to the tuner IC and the chroma IC via the IIC bus, and controls the operation of the tuner IC and the chroma IC. When an infrared blinking signal output from a remote controller is input to a television having such a configuration, a light receiving element is connected to the microcomputer via an external circuit. When the microcomputer inputs the infrared blinking signal, the microcomputer controls the operation of the chroma IC while decoding the infrared blinking signal. At this time, if the specifications of the remote controller were changed, the above-mentioned external circuit had to be replaced, which was complicated.

Therefore, in the invention according to claim 1 configured as described above, a light receiving element capable of inputting an infrared blinking signal transmitted from the outside is connected to the chroma IC. Then, an amplifying circuit, a filter circuit, and a waveform shaping circuit provided in the chroma IC amplify the infrared flicker signal input from the light receiving element to generate an internal signal, and extract a predetermined frequency band of the internal signal. The waveform of the passed internal signal is shaped. At this time, an internal signal composed of serial data whose waveform has been shaped by a decoding circuit arranged in the chroma IC is decoded. At this time, the microcomputer executes variable control for changing the predetermined frequency band extracted by the filter circuit. As a result, even if the specifications of the remote control are changed, the microcomputer can variably control the frequency band of the filter circuit in response to the change in specifications, eliminating the need to replace external circuits and simplifying the specifications of the remote control. Enables you to respond to changes. In addition, by arranging the decode circuit in the chroma IC, it becomes possible to control the operation of the chroma IC based on the infrared blinking signal received without the intervention of a microcomputer, and to speed up the processing. To Furthermore, since the frequency band can be appropriately changed by the microcomputer, it is possible to input not only the infrared blink signal output by the remote controller but also the infrared blink signal for factory adjustment.

As described above, by providing the chroma IC with the signal processing circuit for the infrared blinking signal, it is possible to provide a television that can easily cope with a change in the frequency band of the infrared blinking signal that is appropriately input. It becomes possible to do. On the other hand, the object to which this technical idea is applied is not limited to television as a completed electric device, but can be established as a technical idea that can easily respond to changes in the frequency band of a received radio signal. Needless to say.

Accordingly, a second aspect of the present invention is to provide a tuner IC which receives a broadcast signal and executes signal processing and then outputs an intermediate frequency signal, and amplifies and detects the intermediate frequency signal output from the tuner IC to perform color demodulation. A chroma IC that outputs to a CRT that connects the RGB signals generated by performing the processing, a receiving circuit that receives a radio signal transmitted from the outside based on a predetermined frequency component based on a predetermined frequency condition, The frequency condition is set in the receiving circuit in accordance with the frequency component of the radio signal transmitted from the outside, and the tuner IC and the chroma IC are controlled based on the radio signal received by the receiving circuit. And a microcomputer.

In the invention according to claim 2 configured as described above, the tuner IC receives the broadcast signal, executes the signal processing, outputs the intermediate frequency signal, and outputs the chroma IC from the tuner IC. The intermediate frequency signal is amplified and detected, color demodulation is performed, and the generated RGB signal is output to a connected CRT. Then, the receiving circuit receives a radio signal output from the outside based on a predetermined frequency component based on a predetermined frequency component, based on a predetermined frequency condition, in order to execute an operation control on the television. At this time, in the present invention, the microcomputer sets the frequency condition in the receiving circuit in accordance with the frequency component of the wireless signal described above. Then, the microcomputer controls the operation of the tuner IC and the chroma IC based on the radio signal received by the receiving circuit.

[0012] As an example of the receiving operation of the receiving circuit, the invention according to claim 3 is the television according to claim 2, wherein the receiving circuit transmits the frequency component based on a predetermined carrier frequency. Wireless signal based on the reception carrier frequency set as the frequency condition. In the invention according to claim 3 configured as described above, the receiving circuit converts a radio signal transmitted as a frequency component based on a predetermined carrier frequency based on the receiving carrier frequency set as a frequency condition by the microcomputer. Receive.

[0013] As an example of the radio signal received by the receiving circuit, the invention according to claim 4 is directed to the television according to claim 2 or 3, wherein the receiving circuit is operated at the time of factory adjustment. It is configured to receive a radio signal transmitted as a centralized signal. In the invention according to claim 4 configured as described above, the receiving circuit receives a radio signal transmitted as a factory centralized signal during factory adjustment.

[0014] As another example of the wireless signal received by the receiving circuit, the invention according to claim 5 is the television according to any one of claims 2 to 4, wherein the receiving circuit is configured as follows. It is configured to receive an infrared blinking signal as a wireless signal. In the device according to claim 5 configured as described above, the receiving circuit receives an infrared blinking signal output from a remote controller or the like at the same time as the above factory concentrated signal as a wireless signal.

[0015] As an example of another circuit that is preferably disposed in a receiving circuit, the invention according to claim 6 is a television set according to any one of claims 2 to 5, wherein the receiving circuit is And a data decoding circuit for analyzing serial data superimposed on the wireless signal. In the invention according to claim 6 configured as described above, the receiving circuit is provided with a code circuit using data. Then, the serial data superimposed on the radio signal received by the data decoding circuit is analyzed.

According to a seventh aspect of the present invention, there is provided a television according to any one of the second to sixth aspects, wherein the receiving circuit is provided as an example of an IC suitable for arranging the above-described receiving circuit. Are arranged on the same substrate as the chroma IC. In the invention according to claim 7 configured as described above, the receiving circuit is provided on the same substrate as the chroma IC.

As a specific configuration of the receiving circuit, the invention according to claim 8 is the television according to any one of claims 2 to 7, wherein the receiving circuit amplifies the received wireless signal. The microcomputer includes an amplifier circuit, a filter circuit for extracting a signal based on the received carrier frequency from the amplified radio signal, and a waveform shaping circuit for shaping the waveform of the extracted signal. , The receiving carrier frequency is set. In the invention according to claim 9 configured as described above, an amplifier circuit, a filter circuit, and a waveform shaping circuit are provided in the receiving circuit. Then, the microcomputer is caused to execute a process of setting the reception carrier frequency for the filter circuit.

[0018]

[Effect of the invention]

 As described above, according to the invention of claim 1 or 2, it is possible to provide a television capable of coping with a change in the frequency band of the infrared blinking signal that is easily input. Further, according to the invention of claim 3, an example of the receiving operation in the receiving circuit can be presented. Further, according to the invention of claim 4, an example of a wireless signal received by the receiving circuit can be presented. Further, according to the invention of claim 5, another example of the wireless signal received by the receiving circuit can be presented. Further, according to the invention of claim 6, an example of a radio signal to be received can be presented. Further, according to the invention of claim 7, it is possible to present another example of the radio signal to be received, and to receive both the factory concentrated signal and the infrared blinking signal by appropriately setting the frequency condition. It becomes possible. Furthermore, according to the invention of claim 8, an example of a specific configuration of the receiving circuit can be presented.

[0019]

[Embodiment of the invention]

 Here, embodiments of the present invention will be described in the following order. (1) Configuration of television adjustment system: (2) Configuration of computer: (3) Configuration of television: (4) Configuration of chroma IC: (5) White balance adjustment processing (6) Reception control processing: (7) Summary:

(1) Configuration of Television Adjustment System: FIG. 1 is a system configuration diagram showing a schematic configuration of an example of a television adjustment system to which the television according to the present invention is applied. In FIG. 1, a television adjustment system 10 includes a computer 11, a television 12, and a color analyzer 13 used as a television adjustment device. The color analyzer 13 has a "LOW LIGHT" adjustment probe 130a, a "HIGH LIGHT" adjustment probe 130b, and a "VERY LOW" probe as sensors for detecting a test color pattern projected on the CRT of the television 12. LIGHT "adjustment probe 130c.

Then, the computer 11 outputs the color analysis data to the color analyzer 13 and controls the CRT of the television 12 to display a predetermined color pattern, thereby adjusting the white balance of the television 12. Execute The result of the white balance adjustment is output from the color analyzer 130 to the computer 11. Then, the computer 11 outputs the result of the adjustment to the television 12, and stores the result in an EEPROM (not shown) provided in the television 12. Thus, the setup of the white balance adjustment of the television 12 is performed.

Here, in the present embodiment, the computer 11 and the color analyzer 13 are connected by a serial data cable 14, and the above-mentioned input / output of the color analysis data is executed via the serial data cable 14. . On the other hand, the computer 11 and the television 12 are connected wirelessly. In the present embodiment, a factory signal light emitting section 110 capable of outputting an infrared blink signal is installed in the computer 11, and the factory signal light section 110 can emit an infrared blink signal to the television 12. On the other hand, a factory signal receiving section 120 capable of inputting an infrared blinking signal is installed in the television 12 so that the infrared blinking signal output from the factory signal emitting section 110 can be input.

With this configuration, the computer 11 generates serial data while converting the data, and outputs serial data to the television 12 when outputting data for controlling the display of the color pattern and data of the adjustment result. The output is superimposed on the signal. Then, the television 12 receives the infrared blinking signal, decodes the serial data, and executes processing such as white balance adjustment. As described above, by outputting the factory signal for white balance adjustment to the television 12 using the infrared flicker signal, it is possible to eliminate the work of connecting the computer 11 and the television 12 with the cable. This makes it possible to simplify the adjustment work. Further, in the present embodiment, as described later, a decoder circuit for decoding serial data output from the computer 11 is provided on the chroma IC of the television 12 so that the microcomputer of the television 12 is interposed. The white balance adjustment can be executed without any adjustment, and the adjustment process can be speeded up.

(2) Configuration of Computer FIG. 2 is a hardware configuration diagram showing an internal hardware configuration of the computer 11. In FIG. 1, a computer 11 has a CPU 11a, a ROM 11b, a RAM 11c, a display driver 11d, a hard disk 11e, an I / O 11f, an infrared output port 11g, and a COM port 11h. 11h can mutually transmit and receive data via the bus 11i. Here, a display 11d1 as a display means is connected to the display driver 11d, and a keyboard 11f1 as an input means and a mouse 11f2 are connected to the I / O 11f. A factory signal light emitting unit 110 is connected to the infrared output port 11g, and serial data generated by control processing of the CPU 11a is superimposed via the infrared signal output port 11g and the factory signal light emitting unit 110. An infrared blinking signal can be output to the television 12. A serial data cable 14 as an interface cable is connected to the COM port 11h, and a color analyzer 13 is connected to the end of the serial data cable 14.

In such a configuration, basic programs such as predetermined arithmetic programs and control programs are written in the ROM 11b, and the CPU 11a executes these programs while using the RAM 11c as a work area. Also, the hard disk 11e allows the television 12 to perform display and data setting for adjustment processing based on the infrared output signal from the infrared output port 11g and the infrared signal blinking output from the factory signal light emitting unit 110, and to the COM port 11h. An application program such as a television adjustment processing module that causes the connected color analyzer 13 to execute the adjustment processing is stored. Also, the hard disk 11e is used as a buffer for temporarily storing data such as read processing results and set adjustment parameters, and is used for storing programs that are sequentially updated. You. This application program is started and operated by the CPU 11a as appropriate. In addition, a display 11d1 is connected to the display driver 11d, and an input state and a processing state in the computer 11 are displayed by the CPU 11a.

The above is the schematic configuration of the hardware of the computer 11, and on the premise of such hardware, on the computer 11, various kinds of software are stored on the hard disk 11e in a manner shown in FIG. That is, the BIOS 21 is executed based on the hardware 20 for realizing the above-described various functions, and the operating system 23 and the application 24 are executed on the BIOS 21. Basically, the operating system 23 accesses the hardware 20 via the BIOS 21 or directly, and the application 24 exchanges data with the hardware 20 via the operating system 23. For example, to read data from the hard disk 11e, the user accesses the hardware 20 via the operating system 23.

(3) Configuration of Television: FIG. 4 is a hardware configuration diagram showing an internal hardware configuration of the television 12. In the figure, a microcomputer 12b, an EEPROM 12c, a tuner 12e, and a chroma IC 12f are connected as internal devices to an IIC bus 12a of the television 12, and the internal devices 12b to 12f are connected via the IIC bus 12a. Predetermined data communication is performed with each other. The EEPROM 12c, the tuner 12e, and the chroma IC 12f execute predetermined functions based on serial data transmitted and received on the data line DT under the control of the microcomputer 12b. Further, a remote control signal light receiving unit 121 is connected to the microcomputer 12b, and an infrared blinking signal transmitted from the remote control 30 can be acquired through the remote control signal light receiving unit 121. Here, in the present embodiment, as described above, the factory signal receiving unit 120 is connected to the chroma IC 12f, and an infrared blink signal on which serial data output from the computer 11 is superimposed is input.

In such a configuration, the television 12 functions by controlling the entire apparatus by bidirectional communication related to transmission and reception of serial data on the IIC bus 12a executed by the microcomputer 12b. The tuner 12e selectively receives a television broadcast signal of a desired channel via the antenna 12e1 in accordance with a tuning frequency transmitted from the microcomputer 12b via the IIC bus 12a. The tuner 12e is connected to the chroma IC 12f, generates an intermediate frequency signal from the television broadcast signal selected and received, and outputs the intermediate frequency signal to the chroma IC 12f. Here, the tuner 12e is a tuner employing a so-called voltage synthesizer, and includes a potentiometer (not shown) for a tuning voltage (V0), a VHF low band (VL), a VHF high band (VH), and a UHF (U). And a signal corresponding to a desired tuning frequency is received by appropriately setting these switches.

The chroma IC 12f is a one-chip IC that constitutes a signal processing circuit for the intermediate frequency signal selected and received by the tuner 12e, and includes a video intermediate wave amplifying circuit (VIF circuit), which will be described later, and a detecting circuit. A circuit, a synchronous circuit and the like are provided. A CRT 12g and a speaker 12h are connected to the chroma IC 12f, and the microcomputer 12b controls the VIF circuit and the like of the chroma IC 12f via the IIC bus 12a, so that the intermediate wave signal is converted into a video signal and an audio signal. The video signal is demodulated into a signal and the video signal is displayed on the CRT 12g based on the video signal. Similarly, the audio is output from the speaker 12h based on the audio signal.

(4) Configuration of Chroma IC: Next, FIG. 5 shows a schematic configuration of the chroma IC 12f in the present embodiment. In the figure, a chroma IC 12f is a one-chip IC and includes an intermediate frequency amplification (VIF) circuit 12f1, a detection circuit 12f2, a synchronization circuit 12f3, a burst signal detection unit 12f4, a demodulation unit 12f5, a white balance adjustment unit 12f6, and the like. Has been done. The intermediate frequency signal from the tuner 12e is input to the VIF circuit 12f1. The VIF circuit 12f1 amplifies the intermediate frequency signal to an intermediate frequency and outputs the amplified signal to the detection circuit 12f2. A VCO (Voltage Controlled Oscillator) circuit (not shown) is connected to the detection circuit 12f2. The VCO circuit oscillates an oscillation signal based on a reference oscillation signal input from a crystal oscillation circuit, and outputs the oscillation signal to the detection circuit 12f2. Output. Here, the VCO circuit can change the oscillation frequency of the oscillation signal according to the voltage input from the microcomputer 12b.

The detection circuit 12f2 performs video detection while synchronizing with the oscillation frequency of the oscillation signal from the intermediate frequency signal amplified by the intermediate frequency, separates the composite video signal, and outputs it to the burst signal detection unit 12f4. As for the audio signal, a second audio intermediate frequency signal is created by mixing the audio component and the oscillation signal in the intermediate frequency signal that has been amplified by the intermediate frequency, and is subjected to FM detection to be an AUDIO signal, which is output to the outside. I do. Further, the detection circuit 12f2 also creates a horizontal / vertical synchronization signal (SYNC) based on the oscillation frequency of the oscillation signal in the detection process, and outputs it to the synchronization circuit 12f3. The synchronization circuit 12f3 creates a sawtooth DRIVE signal based on the input horizontal and vertical synchronization signals, and outputs the signal to a deflection circuit including a horizontal deflection circuit and a vertical deflection circuit. At this time, processing is performed based on a signal representing a white balance adjustment value input from the white balance adjustment unit 12f6.

The composite video signal input to the burst signal detector 12f4 is output to the demodulator 12f5. The demodulation unit 12f5 performs a predetermined color demodulation process on the input composite video signal, and outputs a luminance signal (Y) and an RGB signal. Here, in the demodulation unit 12f5, after separating the luminance signal and the carrier chrominance signal, a subcarrier is generated from the burst signal, and the carrier chrominance signal is appropriately demodulated by the subcarrier to obtain a color difference signal. At this time, processing is performed based on various signals representing white balance adjustment values input from the white balance adjustment unit 12f6. Then, each demodulation unit 12f5 generates an RGB signal from the color difference signal and the luminance signal, and outputs the RGB signal and the luminance signal.

The white balance adjustment unit 12f6 receives and holds the white balance adjustment value superimposed as serial data on the infrared blinking signal as a factory signal from the computer 11, and outputs the signal to the demodulation unit 12f5 and the synchronization circuit 12f3. Also outputs a signal to adjust the cutoff. That is, based on an instruction from the computer 11, the white balance adjustment unit 12f6 adjusts the luminance signal and the RGB signal while executing the white balance adjustment of the image displayed on the CRT 12g. In the present embodiment, a light receiving circuit 12f7 and a data decoding circuit 12f8 are provided in the chroma IC 12f, and an infrared blinking signal output from the computer 11 and received by the factory signal receiving unit 120 is input to the light receiving circuit 12f7. The data decoding circuit 12f8 performs serial data conversion to generate the white balance adjustment value described above.

As described above, the infrared signal blinking on which the serial data output from the computer 11 is superimposed is decoded by the data decoder circuit 12f8 provided on the chroma IC 12f, so that the microcomputer 12b performs the decoding process. Can be eliminated. Therefore, data communication between the microcomputer 12b and the chroma IC 12f becomes unnecessary, and the white balance adjustment process can be sped up. Further, since the factory signal can be received wirelessly, it is not necessary to connect the computer 11 and the television 12 with a cable for transmitting and receiving the factory signal. As a result, the connection work can be deleted, and the number of work steps required for white balance adjustment can be reduced.

The luminance signal and the RGB signals output from the chroma IC 12f are output to a cathode amplifier (not shown), amplified by the cathode amplifier, and supplied to the CRT 12g. On the other hand, the AUDIO signal is output to an audio amplifier (not shown), amplified by the audio amplifier, and supplied to the speaker 12h. Then, the speaker 12h outputs sound based on the amplified AUDIO signal. The above-described deflection circuit generates a predetermined horizontal / vertical drive current corresponding to the horizontal / vertical drive signal and supplies it to a deflection coil attached to the CRT 12g, thereby driving the electron beam in the horizontal / vertical direction. A high-frequency signal generated in the horizontal deflection circuit is supplied to the FBT, and a high voltage to be supplied to the CRT 12g is generated. As a result, the CRT 12g emits an electron beam corresponding to the amplified luminance signal and the RGB signal while being driven, and an image is displayed on the screen of the CRT 12g.

Here, white balance adjustment values stored in the EEPROM 12c when adjusting the white balance will be described. FIG. 6 is a data configuration diagram showing a data configuration stored in the EEPROM 12c. In the figure, a white balance adjustment value is stored in a data area. The operation for storing the white balance adjustment value in the EEPROM 12c will be described. In a final adjustment process in a factory where the television 12 is manufactured, a factory signal emission unit 110 of the computer 11 connected to a color analyzer 13 for measuring and digitizing a display color of an image on a CRT 12g, and a factory signal of the television 12 The light receiving unit 120 is connected wirelessly. Then, the television 12 is set to the factory mode by the remote controller 30. Here, a test signal corresponding to the television broadcast signal is generated from the computer 11, and the computer 11 calculates the R adjustment value, the G adjustment value, the B adjustment value, the cutoff adjustment value, and the drive adjustment value from the image of the CRT 12g or the like. The white balance adjustment values are generated and written in the data area of the EEPROM 12c in the television 12 wirelessly.

Here, the microcomputer 12b controls the tuner 12e and the chroma IC 12f based on a program stored in the internal ROM. The microcomputer 12b reads the white balance adjustment value from the EEPROM 12c and outputs it to the chroma IC 12f. Then, the chroma IC 12f holds the input white balance adjustment value in the white balance adjustment unit 12f6. Then, based on the held white balance adjustment value, an image composed of a luminance signal, an RGB signal, a cutoff signal, and a DRIVE signal is adjusted from the intermediate frequency signal input from the tuner 12d so as to adjust the white balance of the image. Generate and output signals. That is, the RGB signal and the luminance signal are adjusted from the R adjustment value, the G adjustment value, and the B adjustment value, the cutoff signal that determines the retrace period of the CRT 12g is adjusted from the cutoff adjustment value, and the drive adjustment value is adjusted. The DRIVE signal is adjusted.

(5) White Balance Adjustment Process FIG. 7 is a flowchart showing the content of the above-described white balance adjustment process. In the figure, first, it is determined whether or not the factory mode has been set (step S100). If the factory mode has been set, the infrared signal blinking signal output from the computer 11 is input to the factory signal receiving unit 120 (step S105). Then, the infrared blink signal is decoded by the data decoding circuit 12f8 (step S110), and the above-mentioned white balance adjustment is executed by the white balance adjustment unit 12f6 (step S115).

FIG. 8 is a configuration diagram showing the internal configuration of the light receiving circuit 12f7. In the figure, the light receiving circuit 12f7 has an amplifier circuit 12f71, a filter circuit 12f72, and a waveform shaping circuit 12f73. Accordingly, the infrared blinking signal received by the factory signal light receiving unit 120 is appropriately amplified by the amplifier circuit 12f71, filtered by the filter circuit 12f72, and shaped by the waveform shaping circuit 12f73 to perform data decoding. The signal is input to the circuit 12f8. In such a case, the receiving carrier frequency of the infrared blinking signal received by the factory signal receiving unit 120 is determined by the filter characteristics of the filter circuit 12f72. Therefore, if this filter characteristic is variably controlled, a plurality of reception carrier frequencies can be received. As described above, if a plurality of reception carrier frequencies can be received, the remote control signal light receiving unit 121 and the factory signal light receiving unit 120 can be shared. FIG. 9 is a configuration diagram showing the configuration of the television 12 in such a case. In the figure, a common light receiving section 122 is provided in the chroma IC 12f so that an infrared blink signal outputted from the remote controller 30 and an infrared blink signal as a factory signal outputted from the computer 11 can be inputted. At this time, the microcomputer 12b executes a reception control process, and controls the reception carrier frequency of the infrared blinking signal received by the common light receiving unit 122.

(6) Reception Control Process FIG. 10 is a flowchart showing the content of the reception control process executed by the microcomputer 12b. In the figure, first, it is determined whether or not the factory mode is set (step S200). When the mode is not the factory mode, the factory signal is not received, so that the common light receiving unit 122 receives the infrared blinking signal output from the remote controller 30. Next, a remote control carrier frequency is obtained based on the infrared blink signal output from the remote control 30 (step S205). There are three carrier frequencies of the remote controller 30, "36.7 kHz", "38 kHz", and "44 kHz" according to the specification. Therefore, it is determined whether or not the acquired carrier frequency is “36.7 kHz” (step S210).

If the carrier frequency is “36.7 kHz”, the reception carrier frequency is set to “36.7 kHz” (step S 215). If it is determined in step S210 that the carrier frequency is not "36.7 kHz", it is determined whether or not the carrier frequency is "38 kHz" (step S220). If the carrier frequency is "38 kHz", the receiving carrier frequency is set to "38 kHz" (step S225).

If it is determined in step S 220 that the carrier frequency is not “38 kHz”, it is determined that the carrier frequency is “44 kHz”, and the reception carrier frequency is set to “44 kHz” (step S 230). On the other hand, if it is determined in step S200 that the mode is the factory mode, the reception carrier frequency is set to that of the factory signal (step S235). Then, the filter characteristic of the filter circuit 12f72 is changed based on the reception carrier frequency set in steps S215, S225, S230, and S235 (step S240). As a result, the common light receiving section 122 can receive the infrared blink signal at the changed reception carrier frequency.

(7) Conclusion: In this way, the infrared signal blinking on which the serial data output from the computer 11 is superimposed can be received by the chroma IC, and the decode of the serial data is stored on the chroma IC 12f. The execution by the data decoder circuit 12f8 provided makes it possible to prevent the microcomputer 12b from intervening in the decoding processing, and to speed up the white balance adjustment processing. In addition, by making it possible to receive the factory signal wirelessly, it is not necessary to connect the computer 11 and the television 12 with a serial cable for transmission and reception of the factory signal, thereby eliminating the work required for white balance adjustment. Man-hours can be reduced. Furthermore, a filter circuit 12f72 is mounted on the light receiving circuit 12f7, and the filter characteristics of the filter circuit 12f72 can be changed, so that the remote control signal light receiving section 121 and the factory signal light receiving section 120 are made common to form a common light receiving section 122. And the device can be simplified.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram showing a system configuration of a television adjustment system.

FIG. 2 is a hardware configuration diagram showing an internal configuration of a computer.

FIG. 3 is a configuration diagram of various software stored in a hard disk drive.

FIG. 4 is a hardware configuration diagram showing an internal configuration of the television.

FIG. 5 is a configuration diagram showing a schematic configuration of a chroma IC.

FIG. 6 is a data configuration diagram showing a data configuration stored in an EEPROM.

FIG. 7 is a flowchart showing processing contents of white balance adjustment processing.

FIG. 8 is a configuration diagram showing an internal configuration of a light receiving circuit.

FIG. 9 is a hardware configuration diagram showing another internal configuration of the television.

FIG. 10 is a flowchart showing processing contents of a reception control processing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Television adjustment system 11 ... Computer 12 ... Television 13 ... Color analyzer 14 ... Serial data cable 110 ... Factory signal light emitting part 120 ... Factory signal light receiving part

Claims (8)

[Utility model registration claims] 1. A high-frequency amplifier circuit for receiving, amplifying and outputting a broadcast wave corresponding to a desired frequency, and generating and outputting a local oscillation signal having a local oscillation frequency corresponding to the desired frequency of the broadcast wave by a PLL circuit. A local oscillation circuit,
A mixing circuit that mixes a local oscillation signal from the local oscillation circuit with an output from the high-frequency amplification circuit, converts the mixed signal into an intermediate frequency signal, and outputs the intermediate frequency signal, and changes a frequency band of the output intermediate frequency signal. A tuner IC having a variable filter circuit for passing a predetermined band of the intermediate frequency signal, an intermediate frequency amplifying circuit for amplifying the passed intermediate frequency signal by an intermediate frequency, oscillating an oscillation signal, and oscillating the oscillation signal. A chroma circuit comprising: a VCO circuit capable of changing the frequency; and a detection circuit for detecting an intermediate frequency signal amplified by the intermediate frequency amplification circuit based on the oscillation frequency of the oscillation signal and outputting a video signal and an audio signal. The tuner IC and the chroma IC through an IC and an IIC bus
And the tuner IC and chroma I
C, wherein the chroma IC is connected to a light-receiving element capable of inputting an infrared-blinking signal sent from outside, and the infrared-blinking light input to the light-receiving element. An amplifier circuit that amplifies a signal to generate an internal signal, a filter circuit that extracts and passes a predetermined frequency band of the internal signal amplified by the amplifier circuit, and shapes the waveform of the internal signal that has passed through the filter circuit A microcomputer that changes the predetermined frequency band extracted by the filter circuit of the chroma IC. A television characterized by being able to perform variable control for causing the television to execute. 2. A tuner IC for receiving a broadcast signal and performing signal processing and then outputting an intermediate frequency signal, and an RGB signal generated by performing amplification detection of the intermediate frequency signal output from the tuner IC and performing color demodulation processing. A chroma IC for outputting a signal to a CRT for connecting a signal, a receiving circuit for receiving a radio signal transmitted from the outside based on a predetermined frequency component based on predetermined frequency conditions, and a frequency of the radio signal transmitted from the outside While setting the frequency conditions in the receiving circuit corresponding to the components,
A television, comprising: a microcomputer that controls the tuner IC and the chroma IC based on a wireless signal received by the receiving circuit. 3. The reception circuit according to claim 2, wherein the reception circuit receives a radio signal transmitted based on a predetermined carrier frequency as the frequency component based on a reception carrier frequency set as the frequency condition. Television. 4. The television according to claim 2, wherein the receiving circuit receives a radio signal transmitted as a factory centralized signal during factory adjustment. 5. The apparatus according to claim 2, wherein the receiving circuit receives an infrared blinking signal as the wireless signal.
The television according to claim 4. 6. The television according to claim 2, wherein said receiving circuit has a data decoding circuit for analyzing serial data superimposed on said radio signal. 7. The television according to claim 2, wherein the receiving circuit is provided on the same substrate as the chroma IC. 8. The receiving circuit includes: an amplifying circuit for amplifying the received wireless signal; a filter circuit for extracting a signal based on the received carrier frequency from the amplified wireless signal; The television according to any one of claims 2 to 7, further comprising a waveform shaping circuit for shaping, wherein the microcomputer sets the reception carrier frequency for the filter circuit.