JPH11122558A - Monitoring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the aging efficiency and to enhance the adjustment job efficiency after the aging process by displaying an image with 2nd luminance after an image with 1st luminance is displayed on a display time so as to configure the monitor in a way that a cathode ray tube is aged. SOLUTION: In the case that the monitor is carried in an aging room, setting information fed via an interface means 10 is stored in a memory 3. The setting information stored therein is information to set a luminance level of a CRT 1 during the aging. For example, the information is control data information to conduct it that a full white image (high luminance aging) with a 1st luminance comparatively higher is displayed for a prescribed time from, e.g. start of the aging process and a full white image (standard aging) with a 2nd luminance nearly equal to the luminance for a conventional aging is displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monitor device for efficiently aging a cathode ray tube on a production line.

[0002]

2. Description of the Related Art A monitor device assembled in a factory or the like is subjected to various adjustments of a high-frequency signal system circuit and a video signal system after each part and a circuit board are attached, and then shipped. I have.

It is known that, for example, a cathode ray tube (hereinafter, referred to as CRT) is used as a display unit of this monitor device. Generally, the luminance characteristics and deflection characteristics of a CRT at the beginning of use are extremely unstable, and it is not meaningful to adjust the luminance level or convergence by this unstable operation. Therefore, in a conventional monitor device manufacturing factory, the monitor device on which each part and the circuit board are set is subjected to an aging room before video-related adjustment such as landing convergence (hereinafter simply referred to as video adjustment) is performed. In this aging room, the fluorescent screen of the CRT is controlled so as to display an all-white screen with high luminance. In this state, the CRT is left for a predetermined time to stabilize the characteristics of the CRT, and then various adjustment processes related to video are started.

[0004]

By the way, if a long time is taken for aging, the video adjustment performed thereafter can be optimally performed. However, this requires a long time for the entire manufacturing process, and the production time becomes long. Sex is not good. Therefore, in order to reduce the time required for the entire manufacturing process, the aging time has been reduced to a certain extent.・
There has been a problem that it is difficult to optimally perform video adjustment such as convergence.

[0005]

SUMMARY OF THE INVENTION In order to solve such a problem, the present invention provides a method of selecting a cathode ray tube and displaying an image having a first brightness or a second brightness on the cathode ray tube. Display control means configured to be able to perform the first brightness, and display time setting means capable of setting the display time of the image of the first brightness, the display time of the first brightness image The monitor device is configured so that the image of the second luminance is displayed after the display according to the above, so that the aging of the cathode ray tube can be performed.

According to the present invention, aging can be performed efficiently, so that various adjustments such as landing convergence can be easily performed even when aging is performed simultaneously with the conventional method. Become.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a monitor device according to the present invention will be described below. First, an outline of the aging operation of the monitor device will be described with reference to FIG. Monitor device T1, T
., Tn are carried into the aging room 50 via the carry-in belt 51, and the aging room 50
Inside, it is conveyed by the conveyance belt 52 and circulates. The monitor circulated in the aging room 50 by the transport belt 52 is carried out of the aging room 50 by the carry-out belt 53.

At the entrance side of the aging room 50, a production control device 54 composed of, for example, a computer device is arranged. Each monitor device T is mounted on, for example, a tray or a table, or the like.
At the time of being carried into the area 0, the production line control device receives setting information for displaying a white image. As will be described later, each monitor device T is provided with means for storing setting information for performing aging, so that a screen is displayed in the aging room 50 at a predetermined luminance in accordance with the setting information. Then, it is circulated in the aging room 50 for a predetermined time (for example, several hours) and is carried out of the aging room 50 by the carry-out belt 53.

A production control unit 55 similar to the production line control unit 54 is provided at the carry-out exit of the aging room 50. The production line control unit 55 cancels (resets) the white image display. Accordingly, each monitor device T moves inside the aging room 50 for a predetermined period of time while displaying an all-white screen, performs aging of the CRT, and is then carried out of the aging room 50.

FIG. 1 is a block diagram showing a main part of a monitor device T according to the present invention. The CRT 1 is configured as a display unit of a monitor device, and when aging is performed, a video signal Sw is supplied at a predetermined luminance under the control of the control unit 2 to display an all-white screen. The memory 3 is configured by a storage unit such as an EEPROM, for example, and is supplied from the production line control unit 54 via the interface unit 10 such as the RS-232 when the monitor device T is carried into the aging room 50. The information is stored. The setting information stored in the memory 3 is information for setting the luminance level of the CRT 1 during aging. For example, a relatively high first luminance at a relatively high first luminance for a predetermined time from the start of the aging process (high luminance screen) Aging), and after a predetermined time has elapsed, an all-white screen (standard) with a second luminance lower than the first luminance, for example, a luminance substantially equal to the luminance when performing conventional aging. Aging). That is, the present invention relates to a method in which CR is used during the aging step.
The aging efficiency is improved by selectively switching the luminance level of T1.

The display time of the all white screen based on the first luminance can be set according to, for example, the size of the CRT 1 and is stored in the memory 3, for example. For this reason, for example, an 8 Byte area is prepared in the memory 3 as a display time setting area, and it is possible to set a maximum of 255 minutes in units of one minute, for example. When the aging process is started, the timer counter 5 starts counting down, for example, based on the display time set in the memory 3.

If, for example, an instantaneous AC interruption occurs during aging and the count value of the timer counter 5 is reset, aging cannot be performed according to the set time. Therefore, the count value of the timer counter 5 is written in the memory 3 every 30 seconds, for example, so that the timer counter 5
Even if the count value is reset, the countdown can be started again based on the count value written in the memory 3. As a result, it is possible to start high-brightness aging for the remaining time with an error of up to 30 seconds after reset.

An ABL (Automatic Brightness Limit) unit 4 is composed of, for example, a high-voltage rectification unit and an overcurrent detection unit. , The anode current value I as digital data
A is supplied to the control unit 2. Then, in the control unit 2, AB
The grid voltage G2 supplied to the second grid of the CRT 1 is controlled so that the anode current value IA supplied from the L unit 4 corresponds to the first luminance level or the second luminance level, The brightness level of the display image is controlled.

FIG. 2 is a schematic diagram for explaining a luminance level controlled with the lapse of time when the aging step is performed. When the aging process is started, the control unit 2 controls the grid voltage G2 so that the anode current IA becomes a HIGH LUMINANSCENCE (hereinafter abbreviated as HL) level. As a result, an all white image is displayed on the CRT 1 at the first luminance level. further,
This HL level is maintained until the high luminance aging time HE set immediately before the start of aging elapses. In addition, even if it does not actually match the HL level,
HL level and slightly lower than this HL level (HL-
n ... where n is an arbitrary value) It is sufficient that the luminance level is maintained between the levels (indicated by hatching).

When the high-luminance aging time HE elapses, the control unit 2 continues to operate until the aging ends.
Controls the grid voltage G2 so that the anode current IA becomes a LOW LUMINANSCENCE (hereinafter abbreviated as LL) level. Also in this case, the LL level and this LL
It is sufficient that the luminance level between (LL-n) levels slightly lower than the level is maintained. This allows
An all-white image is displayed on the CRT 1 at the second luminance level. The LL level is, for example, a luminance level (standard aging level) substantially equal to the conventional aging level. The high-brightness aging time HE may be set according to, for example, the size (large or small) of the CRT 1 or the configuration of the electron gun (single or three).

As described above, by displaying an all-white image at the first luminance level within the time from the start to the end of aging, for example, until a predetermined time has elapsed from the start,
It is possible to improve the efficiency when aging is performed within the same time as in the related art. Conversely, even if the time from the start to the end of the aging is shortened, the same aging as in the related art can be performed.

Next, according to the flowchart of FIG.
An example of the processing operation of the control unit 2 when aging is performed will be described. When the user inputs a high-brightness aging time HE at the time when aging is started, this time is stored in the memory 3 and set in the timer counter 5 (S001), and aging is started, and at the same time, the timer counter is started. 5 start countdown (S00
2). When aging starts, for example, 200 mse
A / D conversion of the anode current IA is performed for each c and the value is measured (S003 → S004). Further, it determines whether to perform high-luminance or standard aging according to the count value of the timer counter 5. For example, when the count value is larger than “0”, that is, when the count is continued (S005), the G2 voltage is controlled so that (HL-n) ≦ anode current IA ≦ HL (S006) An all white screen is displayed on the CRT 1 at the first luminance.

Further, if it is determined in step S007 that 30 seconds have passed, the current count value is stored in the memory 3.
Is updated (S008). In the initial stage, the determination of the elapsed time in step S007 determines the elapsed time from the start of aging. From the next time, the elapsed time after the update process in step S008 is performed is determined. . That is, in steps S007 and S008, the remaining time of the high luminance aging time HE is updated, for example, every 30 seconds from the aging start time.

In step S005, the count value is "0".
When it is determined that the current is less than the above, that is, after the high luminance aging time HE has elapsed, the G2 voltage is controlled so that (LL−n) ≦ anode current IA ≦ LL (S00
9) To display an all-white screen at the second luminance.
Therefore, after the high luminance aging based on the first luminance is completed, the standard aging based on the second luminance is continued until the aging step described with reference to FIG. 4 is completed.

By setting the high-brightness aging time HE to, for example, "0" in advance, high-brightness aging can be prevented, so that a monitor device that does not require high-brightness aging can be used. Can respond. That is, the aging control system can be applied to any monitor device regardless of the model. Further, as the detection of the luminance level, a cathode current may be detected instead of the anode current IA.

[0021]

As described above, the monitor apparatus of the present invention displays an all-white image with relatively high luminance within a period from the start to the end of aging, for example, until a predetermined time has elapsed from the start. As a result, the efficiency in performing aging can be improved. Thereby, the work efficiency of adjustment after an aging step such as landing convergence can be improved.
Also, for example, the screen size of the CRT and the method of the electron gun,
Since the aging time based on the first luminance level can be set according to the specifications of the monitor device, it is possible to perform aging suitable for various monitor devices.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a main part of a monitor device according to an embodiment of the present invention.

FIG. 2 is a diagram schematically showing a luminance level when aging is performed.

FIG. 3 is a flowchart illustrating a luminance level control operation when aging is performed.

FIG. 4 is a diagram illustrating an outline of an aging process.

[Explanation of symbols]

1 CRT, 2 control unit, 3 memory, 4 ABL circuit, 5 timer counter, 10 interface, T
Monitor device

Claims (3)

[Claims] A cathode ray tube; display control means configured to selectively display an image having a first luminance or a second luminance with respect to the cathode ray tube; Display time setting means that can set the display time of the image of the first luminance, and, after displaying the image of the first luminance according to the display time, the image of the second luminance A monitor device capable of performing aging of the cathode ray tube by displaying. 2. The monitor device according to claim 1, further comprising storage means for storing an elapsed time during which the image of the first luminance is displayed at a predetermined timing. 3. The monitor device according to claim 1, wherein the image having the first luminance is an image having a higher luminance than the image having the second luminance.