JPH0437787A - Digital image adjustment and display device - Google Patents

Abstract

PURPOSE:To easily automate adjustments in a manufacture process at low cost by providing a control circuit which supplies digital adjustment signals to respective digital adjusting circuits according to adjustment request signals for screen size, brightness, a hue, focus, and a contrast which are supplied from outside. CONSTITUTION:When the screen size, brightness, hue, focus, contrast, distortion, etc., of the display device 10 are adjusted, they can be adjusted through the signal generator 30 of a personal computer, etc., or remote control unit 40. Namely, when the adjustments are made by the signal generator 30, the adjustment request signals outputted by the signal generator 30 are inputted to a CPU 20 through an input/output interface 22. The CPU 20 once receiving a signal from the signal generator 30 decodes its contents and supplies a digital adjustment signal to a necessary adjusting circuit. The adjusting circuit which receives the adjustment signal from the CPU 20 varies a voltage or current according to the adjustment signal to adjust the screen size, brightness, hue, focus, contrast, distortion, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a display device, and particularly to a display device equipped with a color CRT.

[Conventional technology]

Color CRTs are widely used not only in televisions but also in personal combinator display devices.

Further, display devices and the like have been largely automated by automatically attaching various parts to printed wiring boards. However, a display device is made up of a large number of parts, and due to variations in the performance of the parts, it is not possible to obtain a device with the desired performance simply by assembling predetermined parts. For this reason, display devices have different screen sizes, brightness,
Components that change analog signals, such as variable resistors and coils, are used in the circuit that adjusts images such as hue, focus, and contrast, and the resistance value and coil inductance can be adjusted during the manufacturing process or by the user through adjustment knobs, etc. The performance is adjusted to meet the specified standards.

[Problem to be solved by the invention]

However, the above-mentioned method of adjusting the resistance value of the adjusting variable resistor by changing it using a knob or the like is difficult to automate, and this becomes an obstacle to reducing the cost of the display device. In addition, conventionally, when trying to automatically adjust a variable resistance, not only a motorized driver was required, but also the relative position with the driver was fixed in order to combine with the variable resistance of the display device being assembled. Because of this necessity, a positioning device and the like are required, making the adjustment device complicated and expensive.

The present invention has been made in order to eliminate the drawbacks of the prior art, and provides a digital image adjustment display device that can easily perform automatic image adjustment of screen size, brightness, hue, focus, contrast, etc. It is an object.

[Means to solve the problem]

In order to achieve the above object, the digital image adjustment display device according to the present invention includes adjustment circuits for screen size, brightness, hue, focus, contrast, etc., using digital circuits, and adjusts the screen size given from the outside. The present invention is characterized in that a control circuit is provided for supplying digital adjustment signals to each of the digital adjustment circuits based on adjustment request signals for brightness, hue, focus, contrast, etc.

[Operation] The present invention configured as described above digitizes the circuit that adjusts the screen size, brightness, hue, focus, contrast, etc., and when the control circuit receives an adjustment request signal from the outside, it responds to the request. The digital adjustment signal is output to a circuit that adjusts screen size, brightness, hue, focus, contrast, etc. The adjustment circuit controls voltage and current based on adjustment signals from the control circuit, and adjusts screen size, brightness, hue, focus, contrast, etc. Therefore, by providing an adjustment request signal to the control circuit via a remote control, a personal computer, or the like, adjustment can be easily performed without using a driver or the like. Therefore, it is possible to easily and inexpensively automate the adjustment in the manufacturing process, and the user can also easily adjust the image.

Moreover, the performance can be adjusted according to the usage conditions and preferences of the user.

〔Example〕

A preferred embodiment of the digital image adjustment display device of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an explanatory diagram of a digital image adjustment display device according to an embodiment of the present invention.

In FIG. 1, a display device 10 includes an image system circuit 14 connected to an electron gun (not shown) built in a CRT 12, and a CRT 12.
While exciting a deflection coil (not shown) wound around a deflection yoke 16 disposed at the neck of the RT 12,
A deflection system circuit that applies a high voltage to the 12 anodes is provided.

The video system circuit 14 and the deflection system circuit 18 are circuits for adjusting images such as screen size, brightness, hue, focus, contrast, etc., such as a brightness signal in the video system circuit 14 that adjusts brightness and contrast. digital circuits, such as the vertical position adjustment circuit and horizontal position adjustment circuit in the vertical and horizontal deflection circuits that adjust the raster position, the focus adjustment circuit that adjusts the focus of the electron beam, etc. It is composed by

The digital adjustment circuits in the video system circuit 14 and the deflection system circuit 18 are adapted to receive adjustment control signals from the CPU 20 as a control circuit.

Further, an input/output interface 22 is connected to the CPU 20, and via this input/output interface 22, for example, a personal computer, a computer-aided design device (CAD), etc.
), a signal generator (SG) 30 such as a manufacturing automation system (CAM) is connected, and an adjustment request signal is input from the tongue signal generator 30.

Furthermore, the display bag W10 includes a receiving section 24 and a signal processing section 2.
6 is provided. This receiving section 24 receives an adjustment request signal using a laser beam emitted by a remote control unit (remote control unit) 40, converts it into an electrical signal, and sends it to the signal processing section 26. Then, the signal processing unit 26
The signal from the receiving section 24 is converted and given to the CPU 20.

The remote control unit 40 includes a transmitting section 42 and an operating section 44. The operation unit 44 is provided with a brightness adjustment button, a contrast adjustment button, a focus adjustment button, a hue adjustment button, a chromaticity adjustment button, a screen size adjustment button, a coarse adjustment button, etc. (all not shown). When these buttons on the operating section 44 are operated, the transmitting section 42 outputs an adjustment request signal using a laser beam.

In the embodiment configured as described above, the screen size, brightness, hue, focus, contrast,
When adjusting distortion etc., it can be done using a signal generator 30 such as a personal computer or a remote control unit 40. That is, for example, when adjusting by the signal generator 30,
The adjustment request signal output by the signal generator 30 is input to the CPU 20 via the input/output interface 22. C.P.
When U20 receives the signal from signal generator 30, it decodes its contents and provides a digital adjustment signal to a predetermined adjustment circuit. The adjustment circuit that receives the adjustment signal from the CPU 20 changes the voltage or current based on the adjustment signal to adjust screen size, brightness, hue, focus, contrast, distortion, etc.

FIG. 2 shows an example of a circuit for adjusting the horizontal size of the screen which is adjusted as described above.

In FIG. 2, the horizontal output transistor 50 receives an input signal at its base, and its emitter is grounded. A buffer diode 52, a capacitor 54, and a series circuit of a deflection coil 56 and a capacitor 58 are connected in parallel to the collector of the transistor 50, and an example terminal of a primary winding of a transformer 60 is connected to the collector. . Further, a digital adjustment circuit 64 for controlling the voltage of the +Bt source is connected to the other terminal of the primary winding of the transformer 60 via a D/A converter 62. An adjustment signal from the CPU 20 is input to this digital adjustment circuit 64.

Therefore, when the signal generator 30 issues an adjustment request signal to enlarge or reduce the horizontal size of the screen, the CPU
20 provides an adjustment signal to digital adjustment circuit 64 based on the request. The digital adjustment circuit 64 is connected to the CPU2
The voltage of the 10B power supply is increased or decreased according to the adjustment signal from 0 and output. This output voltage is converted into an analog value by the D/A converter 62 and applied to the primary winding of the transformer 60. Thereby, the output on the secondary side of the transformer 60 changes, and the horizontal size of the screen can be adjusted.

Note that when making adjustments using the remote control unit 40, an operation button corresponding to the content to be adjusted is operated on the operation section 44 of the remote control unit 40. This results in
The transmitter 42 converts the requested adjustment details into a laser beam signal and outputs the signal.

The receiving section 24 of the display device 10 receives the signal transmitted by the transmitting section 42 of the remote control unit 40, and transmits the contents to the CP.
It is converted into a format that can be decoded by U20 and provided to CPU20. After that, the adjustment is the same as the adjustment by the signal generator 3o.

In this way, in the embodiment, the image adjustment circuit is digitized, and the CPU 20, which is a control circuit, outputs a digital adjustment signal to the adjustment circuit in response to an adjustment request given from the outside to adjust the screen size. , brightness, hue, focus, contrast, distortion, etc., so these adjustments can be easily made, and automatic adjustment and inspection in the manufacturing process are possible. Furthermore, the remote control unit 40 and the like allow the user to easily adjust the performance to suit the usage conditions and preferences.

FIG. 3 shows a system for automatic adjustment or inspection in the manufacturing process.

In FIG. 3, an image sensor 70 is disposed in front of the CRT 12 of the display device 10 so as to face each other.
The state of the second image can be detected. The output of the image sensor 70 is input to an image processing device 72, and is provided to a personal computer 74 as various image data.

The personal computer 74 has various inspection standard data in a storage device such as a floppy disk, and provides this inspection standard data to the CPU 20 via the input/output interface 22, and displays the image captured by the image sensor 70 on the display section 76. Displays data, comparison data between image data and inspection standard data, etc. Then, the CPU 20 outputs an adjustment signal to each adjustment circuit so that the given inspection standard data can be obtained.

The personal computer 74 may compare the image data and the inspection standard data and output an adjustment request signal to eliminate the discrepancy between the two, or the inspection standard data may be given from the keyboard 78. It is.

〔Effect of the invention〕

As explained above, according to the present invention, the screen size,
In addition to digitizing the circuit that adjusts brightness, hue, focus, contrast, etc., when the control circuit receives an external adjustment request signal, it outputs the digital adjustment signal corresponding to the request to the screen size, brightness, hue, focus, contrast, etc. In order to control the voltage and current of the adjustment circuit by outputting it to the adjustment circuit and adjust the screen size, brightness, hue, focus, contrast, etc., the control circuit By giving an adjustment request signal to the controller, adjustment can be easily performed without using a driver or the like. Therefore, it is possible to easily and inexpensively automate the adjustment in the manufacturing process, and the user can also easily adjust the image. Moreover, the performance can be adjusted according to the usage conditions and preferences of the user.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a digital image adjustment display device according to an embodiment of the present invention, FIG. 2 is a diagram showing an example of a circuit for adjusting the horizontal screen size of the embodiment, and FIG. FIG. 2 is an explanatory diagram of a system for adjustment and inspection. 10----Display device,! 2----CRT,
14--Image system circuit, 18--Deflection system circuit, 20
----%II control circuit (CPU).

Claims (1)

[Claims] (1) A circuit for adjusting the screen size, brightness, hue, focus, contrast, etc. is configured by a digital circuit, and based on the adjustment request signal for the screen size, brightness, hue, focus, contrast, etc. given from the outside, A digital image adjustment display device comprising a control circuit that provides a digital adjustment signal to each of the digital adjustment circuits.