JPH0898222A - Check signal digitizing and display device for television receiver - Google Patents

Abstract

PURPOSE: To quantitatively check a check object TV receiver by directly digitizing and displaying the minute change, which doesn't appear in the picture on the TV receiver, from a check signal in the receiver. CONSTITUTION: The picture detection signal of the check object TV receiver is inputted to a measurement signal generation part 3 through a first amplifier 7, and the generation part 3 detects horizontal and vertical synchronizing signals by horizontal and vertical synchronism detectors 10 and 11, and generated measurement signals of plural systems are inputted to a voltage measuring part 4 through a measurement signal generator 12. Detection signals are selected by an input switch 8 and are inputted to the voltage measuring part 4 through a second amplifier 1. The measuring part 4 temporarily holds values measured by measurers 13 to 15 in a holder 16 and outputs them to a check operation part 5, and they are encoded through a switch 19 and an A/D converter 19, and a conversion table 21 is referred to subject them to operations in a computing element 22, and the results are digitally displayed on a display part 6. Thus, the minute change which doesn't appear in the picture can be recognized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver inspection signal for selecting a plurality of inspection analog signals of a television receiver to be inspected, performing arithmetic conversion into an inspection value corresponding to the inspection item, and digitizing and displaying the inspection value. The present invention relates to a digitized display device.

[0002]

2. Description of the Related Art Conventionally, in a television production inspection process, in order to inspect whether or not a television receiver is in an optimum state, an inspection value is calculated and displayed for an inspection item. For example, in Japanese Unexamined Patent Publication No. 4-37787, an image sensor and an image processing device are used to determine whether or not a television receiver is in an optimum state, and a personal computer calculates the grasped state of the television receiver. There has been proposed a digital image adjustment display device that reflects the calculated result of the personal computer through an interface to a television receiver having a built-in CPU with a digital signal from the personal computer after displaying the determined result on the display unit.

[0003]

However, in the above method, a subtle state that hardly appears as a change in the image of the television receiver to be inspected is calculated in the video circuit inside the television receiver. Is difficult to reflect as.

The present invention has been made in order to solve the drawbacks of the prior art, and the inspection signal of the television receiver to be inspected is taken out directly from the video circuit inside the television receiver to receive the television image to be inspected. It is an object of the present invention to provide a device that numerically displays by converting a subtle state that hardly appears as a change in a machine image as an inspection value in real time.

[0005]

In order to solve the above-mentioned problems, the inspection signal numerical display device for a television receiver of the present invention comprises a first input section for inputting a video detection signal of the television receiver to be inspected. , A second input section for selectively inputting the inspection signal of the television receiver to be inspected, a measurement signal generation section for generating a plurality of arbitrary measurement signals of the same cycle as the video detection signal, and a measurement signal for the measurement signal generation section Consists of a voltage measurement unit that measures and holds multiple voltages according to the test value, an inspection value calculation unit that calculates inspection values from the voltage values held by the voltage measurement unit, and a display unit that displays the calculation results of the inspection value calculation unit in a numerical form. To be done.

[0006]

According to the present invention, with the above-described structure, a subtle state that hardly appears as a change in the image of the television receiver is displayed by digitizing the inspection value directly from the voltage value of the inspection signal inside the television receiver. It can be grasped by things.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A test signal digitizing and displaying apparatus for a television receiver according to an embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a block diagram showing the configuration of an inspection signal digitized display device of a television receiver according to the present invention. Figure 1
In the figure, 1 is a first input section for performing a function or action of inputting a video detection signal of a television receiver, 2 is a second input section for performing a function or action of inputting an inspection signal of a television receiver, and 3 is a television A measurement signal generator that performs a function or action to generate a plurality of systems of measurement signals of the same cycle synchronized with the video detection signal of the John receiver at an arbitrary phase, 4
Is a voltage measuring unit that performs a function or action for measuring and holding the voltage value of the inspection signal of the television receiver based on the time when the measurement signal is generated, and 5 is the voltage of the inspection signal of the television receiver that has been measured and held. A test value calculation unit that performs a function or action of calculating a check value from a value in real time,
Reference numeral 6 is a test value display unit that performs a function or action of outputting a calculation result. Reference numeral 7 is a first amplifier that performs a function or action for amplifying a video detection signal in the first input unit 1, and 8 is an input switcher that performs a function or action for selecting one inspection signal from a number of inspection signals in the second input unit. , 9 is a second amplifier for amplifying the inspection signal in the second input section 2 or 10, and 10 is a horizontal synchronization detector for detecting or detecting the horizontal synchronization in the measurement signal generating section 3 from the video detection signal, Reference numeral 11 is a vertical synchronization detector that performs a function or action of detecting vertical synchronization from the video detection signal in the measurement signal generation unit 3, and 12 is a measurement signal generation that performs a function or action of generating a plurality of measurement signals in the measurement signal generation unit 3. The voltage measuring units 13 to 15 measure the voltage value of the inspection signal in the voltage measuring unit 4 based on the generation time of the measurement signal. 16 to 18 are measurement value holders that perform the function or action of temporarily holding the voltage value measured by the voltage measurement unit 4, and 19 is one from the voltage values of the multiple-system inspection signals measured and held by the inspection value calculation unit 5. A switch for performing a function or an action for selecting, an analog / digital converter 20 for performing a function or an action for encoding a voltage value in the inspection value operation unit 5, and a function 21 for an operation conversion table in the inspection value operation unit 5 or A conversion table for operating, 22 is an arithmetic unit for performing a function or action of the inspection value in the inspection value operating unit 5, and 23 is a display for performing a function or action of displaying an operation result in the inspection value displaying unit 6. Is. Next, the operation of the above component device will be described.

The video detection signal and the inspection signal of the television receiver to be inspected are input to the first input section 1 and the second input section 2, respectively. The first input unit 1 appropriately amplifies the video detection signal by the first amplifier 7 and transmits it to the measurement signal generation unit 3. The second input unit 2 appropriately amplifies the inspection signal selected by the input switch 8 by the second amplifier 9 and transmits it to the voltage measuring unit 4. In the measurement signal generation unit 3, the horizontal synchronization signal and the vertical synchronization signal of the video detection signal transmitted from the first input unit 1 are detected by the horizontal synchronization detector 10 and the vertical synchronization detector 11, respectively,
The measurement signal generator 12 generates a plurality of systems of measurement signals at an arbitrary phase having the same cycle as the vertical synchronization signal, and transmits the systems to the voltage measurement unit. The voltage measurement unit 4 measures the voltage value of the inspection signal at a timing of the measurement signal generated by the measurement signal generation unit 3 with a plurality of systems of voltage measuring devices, and temporarily holds the voltage measurement value with a measurement value holder. The temporarily held voltage value is transmitted to the inspection value calculation unit 5. The inspection value calculation unit 5 sequentially encodes the voltage values held by the measurement value holders of the plurality of systems by the analog / digital converter 20 via the switch 19, and the conversion table 2
While referring to 1, the inspection value is calculated and the calculation result is displayed on the display unit 6
It is sent to the arithmetic unit 22 which is transmitted to. The display unit 6 digitizes and displays the inspection values sent from the inspection value calculation unit 5.

Due to the above-mentioned operation, the inspection value can be displayed numerically directly from the voltage value of the inspection signal inside the television receiver even in a subtle state where it hardly appears as a change in the image of the television receiver. Can be grasped by.

[0010]

As described above, according to the present invention, by a simple device configuration, a subtle state that hardly appears as a change in the image of the television receiver is digitized and displayed directly from the inspection signal inside the television receiver. Therefore, the state of the television receiver to be inspected can be inspected quantitatively.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an inspection signal digitized display device of a television receiver according to an embodiment of the present invention.

[Explanation of symbols]

 1 1st input part 2 2nd input part 3 Measurement signal generation part 4 Voltage measurement part 5 Test value calculation part 6 Test value display part

Claims (1)

[Claims] 1. A first input section for inputting a video detection signal of a television receiver to be inspected, a second input section for selectively inputting an inspection signal of a television receiver to be inspected, and the first input section. A measurement signal generating section for detecting a synchronization signal from a video detection signal and generating an arbitrary measurement signal having the same cycle as the synchronization signal, and measuring the voltage value of the inspection signal of the television receiver to be inspected via the second input section. Depending on the item of the inspection signal from the voltage value of the inspection signal of the television receiver to be inspected, which is temporarily held by the voltage measurement unit, which is measured and temporarily held at the generation time of the measurement signal generated from the signal generation unit. An inspection signal numerical display device for a television receiver, comprising: an inspection value calculation unit for calculating an inspection value; and a display unit for numerically displaying a calculation result of the inspection value calculation unit.