KR100304447B1 - White Balance Adjustment Device and Adjustment Method - Google Patents

Abstract

The present invention provides a white balance adjusting device and a method for adjusting white balance, which is essential at the time of shipment from a television factory, to be quickly and accurately in an optimum balance state.

The white balance adjusting device of the present invention comprises: a white balance sensor 20 attached to a CRT surface of a television for measuring color temperature; A controller (30) for detecting color temperature information input from the white balance sensor (20) and calculating a color temperature correction value for a reference color temperature; A memory unit 60 for storing color temperature correction value data for a reference color temperature used by the controller 30; A pulse generator 40 generating a control pulse for an adjustment command according to a control signal output from the controller 30; And a pulse transmitter 50 for generating an infrared signal to transmit the pulse signal generated by the pulse generator 40 to the receiver 8 of the television. In addition, the white balance adjustment method of the present invention comprises the steps of measuring the color temperature output from the television CRT; Comparing the color temperature measured in the step with a reference color temperature and calculating a correction value; Outputting an adjustment pulse signal according to the correction value calculated in the step; And automatically adjusting the white balance of the television by transmitting a pulse signal, and this process continues until the white balance of the television is optimized to reference white.

Description

White Balance Adjustment Device and Adjustment Method

The present invention relates to an apparatus and method for adjusting white balance, which is a reference for color output of a television, and more particularly, to adjust a white balance that a worker must manually perform before a television is shipped on an assembly line of a factory. By automating, white balance adjustment can be performed in an optimal state and can be performed quickly and accurately.

White balance is an operation for correcting the deviation of the CRT so that the color of the object output through the CRT of the television is displayed in an optimal state, that is, in a state of visible color. This adjustment is, of course, a white balance adjustment performed by the user who purchased the TV to a desired degree, but it is a task that must be performed before shipping.

1 shows an example of an internal configuration of a general television receiver as a block diagram. As shown, the television receiver comprises an antenna 1, a tuner 2, a V-decoder or data decoder 2 ', which is a major component of the V-chip function, and IF amplifiers, which usually constitute a chroma IC to a main IC. 3, P / S separator 4, audio detector 5, video detector 6, audio processor 10, OSD generator 13, image processor 14 and mixer 15 ), Remote control unit 7, receiver 8, microcomputer 9, E ² PROM 9 'as memory means, voice amplifier 11, speaker 12, CRT driver 16 and CRT 17 It is configured to include).

The broadcast signal of the airwave is received by the antenna 1, and the broadcast signal received by the tuner 2 controlled by the microcomputer 9 is tuned. The IF amplifier 3 amplifies an intermediate frequency (IF) signal output from the tuner 2, and the P / S separation unit 4 includes a surface acoustic wave filter to convert the intermediate frequency (IF) into an image intermediate frequency ( PIF) and voice intermediate frequency (SIF).

The voice detector 5 detects a voice signal from the voice intermediate frequency (SIF), and the voice processor 10 detects the detected voice signal based on the control signal of the microcomputer 9 (Base) and Treble. Voice processing such as volume, volume, etc. is performed, and the processed voice signal is amplified by the voice amplifier 11 and output to the speaker 12.

The image intermediate frequency PIF is detected by an image signal in the image detector 6, and the image processor 14 detects the color, tint, brightness, etc. according to the control signal of the microcomputer 9. Processing to output R (Red), G (Green), B (Blue) and luminance (Y) signals corresponding to the image signal, and the R, G, B and luminance (Y) signals are displayed on the OSD in the mixer 15. By mixing and outputting the R ', G', B 'and OSD blanking signals Y' generated from the generator 13, the CRT 17 is driven through the CRT driver 16, and the OSD generator 13 is The image is displayed together with the predetermined OSD pattern data from.

In addition, the remote control device 7 is a device for the viewer to control the output volume, channel switching, etc., or to remotely control the overall device, and transmits an infrared signal and receives it from the receiving unit 8 of the television to convert it into an electrical code signal. By converting and outputting to the microcomputer 9, the overall apparatus is controlled by the microcomputer 9 in accordance with the electrical code signal.

Conventionally, in order to perform white balance adjustment, the CRT RGB drive stage and the RGB bias stage are manually adjusted by using a variable adjustment resistor, or in an IIC bus type television, a program capable of adjusting the respective registers. The operator performed the adjustment using the remote control. The latter method is simpler than the former, but also has the inconvenience that the operator has to work manually using the remote control, and it takes a lot of time to adjust.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an adjustment device and an adjustment method capable of quickly and accurately performing white balance of an television in an optimal state.

It is another object of the present invention to provide a white balance adjustment device and an adjustment method which can reduce cost and work productivity in a television production work line.

1 is a block diagram showing an example of a circuit configuration of a conventional TV receiver;

2 is a block diagram of one embodiment of a white balance adjusting device according to the present invention;

3 is a flowchart illustrating a white balance adjustment method according to the present invention;

4 is a front view of a television showing a state in which a color temperature is measured using a white balance sensor according to the present invention;

* Explanation of symbols on the main parts of the drawing

1: Anna 2: Tuner 2 ': Data Decoder

3: IF amplifier 4: P / S separation part 5: negative detector

6: video detector 7: remote controller 8: receiver

9: Micom 9 ': E ² PROM 10: Voice processing unit

11: audio amplifier 12: speaker 13: OSD generator

14: image processing unit 15: mixer 16: CRT drive unit

17: CRT 20: White Balance (W / B) Sensor,

30: control unit 40: pulse generator 50: pulse transmitter

60: memory

The white balance adjustment device of the present invention for achieving the above object, the white balance sensor is attached to the CRT surface of the television for measuring the color temperature; A control unit for detecting color temperature information input from the white balance sensor and calculating a color temperature correction value for a reference color temperature; A memory unit for storing color temperature correction value data for a reference color temperature used in the control unit; A pulse generator for generating a control pulse for an adjustment command according to the control signal output from the controller; And a pulse transmitter for transmitting the pulse signal generated by the pulse generator to the receiver of the television.

In addition, the white balance adjustment method of the present invention comprises the steps of measuring the color temperature output from the television CRT; Comparing the color temperature measured in the step with a reference color temperature and calculating a correction value; Outputting an adjustment pulse signal according to the correction value calculated in the step; And automatically adjusting the white balance of the television by transmitting a pulse signal.

Hereinafter, the white balance adjustment device and the adjustment method of the present invention will be described in detail with reference to the accompanying drawings.

According to the present invention, the adjustment can be carried out in an optimal state and can be performed quickly and accurately by automatically performing a white balance adjustment which must be made manually by the operator before the television is shipped out on the assembly line of the factory.

Figure 2 shows an example of the configuration of the white balance adjustment device of the present invention as described above. As shown, it is composed of a white balance (W / B) sensor, a controller, a pulse generator, a pulse transmitter and a memory.

The white balance sensor 20 is attached to the CRT 17 surface of the television for adjusting the white balance and used to measure the color temperature of the color output from the CRT 17. Normally, when the television is turned on, various colors are displayed on the CRT 17, and among them, the C-white light, which is the reference white color, is measured and adjusted. The reference white color is an important color for designing television systems, and the reference white color temperature is 6774 ° K in the C light standard.

The controller 30 is used to detect color temperature information input from the white balance sensor 20 and calculate a color temperature correction value. That is, the controller 30 detects the color temperature information output from the CRT 17 of the television to be measured at present, and compares the correction value data of the pre-built reference white to calculate a correction value. The controller 30 may be configured by using a microprocessor that is normally used for control.

The white balance adjustment correction data calculated by the controller 30 is input to the pulse generator 40, and the pulse generator 40 generates a control pulse in accordance with this signal. The control pulse is an adjustment value used directly to adjust the white balance. The pulse signal generated by the pulse generator 40 is input to the pulse transmitter 50. Here it is modulated into a signal for transmission to the receiver 8 of the television and then propagated to the air. On the other hand, the color temperature correction value data used in the control unit 30 is stored in the memory unit 60 and read out as necessary.

In addition, although the adjustment device of the present invention is configured as a separate device, it is possible to connect the control unit 30 and the memory unit 60 to the computer using the microcomputer and the memory unit of the computer. That is, the present invention is that the white balance sensor 20 can be easily installed in an existing personal computer by constructing one module and extending it by using wires, and by configuring the pulse transmitting unit 50 in another module form. It will be apparent to those skilled in the art.

White balance adjustment method of the present invention that can be implemented in the device having the above configuration, the step of measuring the color temperature output from the television CRT; Comparing the color temperature measured in the step with a reference color temperature and calculating a correction value; Outputting an adjustment pulse signal according to the correction value calculated in the step; And adjusting the white balance of the television by transmitting a pulse signal.

The adjustment method of the present invention will be described with reference to FIGS. 2 and 3.

When the mode for adjusting the white balance of the television is set, first, the color temperature of the reference white of the CRT 17 is detected. This is performed by measuring the color temperature data using the white balance sensor 20, the detected color temperature data is input to the controller 30.

When the measured color temperature data is input, the controller 30 compares the input color temperature data with a reference color temperature value (reference white temperature value) and calculates a correction value. This is determined by reading the color temperature correction data stored in the memory unit 60 in the control unit 30. The color temperature correction data is measured through the white balance sensor 20 and then the RGB correction value (ie, RGB driver, RGB bias value) required between the color temperature data inputted to the controller 30 and the reference color temperature data (reference white) is obtained. Calculate.

When the correction value for the adjustment is determined as described above, the controller 30 outputs a control signal to the pulse generator 40 to generate a pulse corresponding to the RGB correction value. In response to the control signal, the pulse generator 40 generates a command pulse signal. The command pulse signal is a pulse signal including a set of instructions input to a television to change an RGB driver and an RGB bias value.

The pulse signals generated by the command of the controller 30 are inputted to the pulse transmitter 50 again and converted into a proper signal form and then radiated into the air. The signal form generated at this time is for controlling a television and has the same signal form as the remote control signal, usually an infrared signal form. The emitted pulse signal is input to the receiving unit 8 (see Fig. 1) of the television and then to the microcomputer 9 of the television.

When the command signal is input, the microcomputer 9 outputs a control signal to perform the operation accordingly. In other words, the RGB driver and the RGB bias value are adjusted to output the changed white signal through the CRT 17. Also stores the control value included in the input command signal.

The color temperature of the reference white output through the CRT 17 is detected by the white balance sensor 20 and compared with the reference color temperature. At this time, if the measured color temperature and the reference color temperature coincide, the control unit 30 outputs an acoustic signal to terminate the work. When the white balance adjustment work is completed, the worker moves the white balance sensor 20 and attaches it to another TV's CRT to continue the adjustment work as described above. Alternatively, the adjustment operation may be performed while the television is moved using the conveyor system while the white balance sensor 20 is fixed.

However, if the measured color temperature and the reference color temperature do not coincide with each other, the white balance adjustment is continued until the color temperature is matched by performing operations such as color temperature measurement, comparison, and calculation of the correction value as described above.

4 shows the white balance adjustment of the television by the adjusting device of the present invention. As shown in the figure, adjustment is performed with the white balance sensor 20 attached on the surface of the CRT 17 of the television 18. At this time, although not shown, the pulse transmitter 50 of the adjusting device is directed to the infrared receiver of the television, so that the work by the white balance sensor 20 is quickly performed.

The white balance sensor 20 may be manufactured through a wire or as a portable device by making a single device as described above.

According to the embodiment of the present invention described above, the adjustment is optimally performed by automatically performing the white balance adjustment that the operator must manually perform before the television is shipped out on the assembly line, and also the adjustment can be performed quickly and accurately. Can be.

While the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited thereto, and the present invention may be variously modified and changed without departing from the spirit or the field of the present invention. It will be readily apparent to those of ordinary skill in the art.

Claims (2)

A white balance adjusting device for automatically adjusting the white balance of a television; A white balance sensor 20 attached to the CRT surface of the television to measure color temperature; A controller (30) for detecting color temperature information input from the white balance sensor (20) and calculating a color temperature correction value for a reference color temperature; A memory unit 60 for storing color temperature correction value data for a reference color temperature used by the controller 30; A pulse generator 40 generating a control pulse for an adjustment command according to a control signal output from the controller 30; And a pulse transmitter (50) for generating an infrared signal to transmit the pulse signal generated by the pulse generator (40) to the receiver (8) of the television. A white balance adjustment method for automatically adjusting the white balance of a television; Measuring a color temperature output from the television CRT; Comparing the color temperature measured in the step with a reference color temperature and calculating a correction value; Outputting an adjustment pulse signal according to the correction value calculated in the step; And automatically adjusting a white balance of the television by transmitting a pulse signal.