JPH06178311A - White balance adjusting method - Google Patents

Abstract

PURPOSE:To optimize the adjustment of white balance by storing various kinds of data for white balance adjustment and inputting code data in accordance with the kind of a personal computer to be connected. CONSTITUTION:At the time of connecting the personal computer A as a connection equipment, for example, code data of the personal computer and a prescribed instruction for adjusting white balance are inputted to an input part 3, data 21 (A225) and 22 (C213) for cutoff and amplification degree adjustment, which are stored in a non-volatile memory 4, by using a microcomputer 5, are registered in a prescribed register, and a cutoff control signal 8 and an amplification degree control signal 9 are generated based on data 21 and 22 for adjustment. The signals 8 and 9 are transmitted to a white balance adjustment part 1 in a prescribed order and the cutoff point of an amplifier and the amplification degree of the amplifier are set. Thus, the connection to the personal computer, etc., based on the setting of various color temperatures to a CRT display is attained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CRT display for optimally displaying the color of the video signal output by the personal computer or the like when the personal computer or the like is connected to the CRT display. Regarding white balance adjustment method.

[0002]

2. Description of the Related Art Most CRT displays have a multi-scan function and are compatible with devices such as personal computers having various horizontal and vertical frequencies. Therefore, various personal computers and devices are connected to these CRT displays for use. Conventionally, in a multi-scan monitor, only one type of standard setting data for white balance can be registered internally, even though various personal computers and devices having different color temperature settings are connected. Therefore,
In order to obtain the optimum white balance, the user needs to adjust the white balance of the multi-scan monitor with the device connected, except when the optimum white balance is obtained when the standard setting data is used.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and stores data for adjusting a variety of white balances, and according to the type of equipment such as a personal computer to be connected, An object of the present invention is to provide a white balance adjusting method capable of registering the standard setting data in a register or the like for white balance adjustment by inputting code data of a device and performing optimum white balance adjustment.

[0004]

In order to achieve the above object, white balance adjusting means for setting the cutoff and amplification of each output circuit for each R, G, B signal, and an input command. On the basis of the above, it comprises a control means for supplying a signal for controlling the white balance adjusting means via a predetermined terminal, an input means for inputting a command and the like, and a memory means for storing data for white balance adjustment.

[0005]

With the above configuration, when a code representing a type of the personal computer or the like and a predetermined command are input according to the personal computer or the like to be connected, adjustment data for white balance adjustment corresponding to the personal computer is input. Is read from the memory means, registered in the register, and the control signals generated based on the adjustment data registered in the register are supplied to the white balance adjusting means in a predetermined order, and output for each R, G, B signal. Set the cutoff and amplification of the circuit.

[0006]

The white balance adjusting method according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram of a circuit that realizes a white balance adjusting method according to the present invention. Reference numeral 1 denotes a white balance adjusting unit which inputs the R video signal 7 and adjusts the cutoff point and the amplification degree of the R signal amplifier provided in the R signal output circuit. Reference numeral 2 is a CRT for inputting R, G, B signals and displaying in color. Reference numeral 3 is an input unit for inputting setting data, commands, or code data corresponding to the type of connected device. Reference numeral 4 denotes a non-volatile memory that stores data for white balance adjustment. Reference numeral 5 is a microcomputer that outputs signals 8 and 9 for controlling the white balance adjusting means via a predetermined terminal based on an input command or code data indicating the type of connected device.

The operation of the white balance adjusting method according to the present invention will be described. FIG. 2 is a relational table of pre-stored adjustment data and corresponding connection device names in the white balance adjusting method according to the present invention. Reference numeral 20 is a name of a device connected to the CRT display, and reference numeral 21 is cutoff adjustment data for generating a cutoff control signal for the amplifier of the white balance adjusting unit 1. Reference numeral 22 is amplification degree adjustment data for generating an amplification degree control signal for the amplifier of the white balance adjusting section 1. When the type of equipment to be connected is connected from the input unit 3, for example, the personal computer A is connected as the connected equipment, when the code data representing the personal computer A and a predetermined command for white balance adjustment are input, the microcomputer 5 is non-volatile. The data 21 (A for adjustment of cutoff and amplification stored in the memory 4
225) and 22 (C213) are read out and registered in a predetermined register, and the adjustment data 21, 2
The cutoff control signal 8 and the amplification degree control signal 9 are generated based on 2, and the cutoff control signal 8 and the amplification degree control signal 9 are supplied to the white balance adjusting section 1 in a predetermined order. The white balance adjusting unit 1 sets the cutoff point of the amplifier and the amplification degree of the amplifier based on the received control signal. The data for adjusting the white balance of the device connected to the CRT display may be registered in advance in the nonvolatile memory 4 by the manufacturer for each model. Alternatively, the non-volatile memory 4 may be implemented by a memory card, and the memory card may be replaced to supply data for adjustment of white balance adjustment of a new device from the manufacturer to the user. Further, the white balance adjusting section 1 is necessary for each of the R, G, B video signals, but for convenience of description, only the R signal system is described as a representative.

[0008]

As described above, according to the present invention, data for adjusting various kinds of white balance adjustments is stored, and the code data of the device such as a personal computer to be connected is simply input according to the type of the device. Then, there is provided a white balance adjusting method capable of registering the data for the adjustment in a register or the like and making an optimum adjustment. Therefore, the CRT display (multi-scan monitor) according to the present invention can be connected to a device such as a personal computer based on various color temperature settings and can easily obtain an optimum white balance.

[Brief description of drawings]

FIG. 1 is a block diagram of a circuit that realizes a white balance adjusting method according to the present invention.

FIG. 2 is a relationship table between pre-stored adjustment data and corresponding connection device names in the white balance adjustment method according to the present invention.

[Explanation of symbols]

 1 White balance adjustment unit 2 CRT 3 Input unit 4 Non-volatile memory 5 Microcomputer 7 R Video signal 8 Cutoff control signal 9 Amplification control signal 20 Connection device name 21 Cutoff adjustment data 22 Amplification adjustment data

Claims (2)

[Claims] 1. A white balance adjusting means for setting a cutoff and an amplification factor of each output circuit for each of R, G, B signals, and the white balance adjusting means via a predetermined terminal based on an input command. Control means for supplying a signal for controlling, an input means for inputting a command and the like, and a memory means for storing data for white balance adjustment, for the stored adjustment based on the input command, etc. Data is extracted, a control signal is generated based on the data for the adjustment, the control signal is supplied to the white balance adjusting means, and the cutoff of the output circuit and the amplification degree are set based on the control signal. A white balance adjusting method characterized by the above. 2. The white balance adjusting method according to claim 1, wherein the memory means is a memory card.