JP2009294296A - Liquid crystal image display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal image display device capable of displaying an image for adjustment for performing a white balance adjustment without using external equipment for inputting image data for adjustment. <P>SOLUTION: A liquid crystal TV set 1 as liquid crystal image display device includes: a liquid crystal panel 3 for displaying a color image; an image memory 5 for adjustment in which the image data for adjustment as image data of an image for adjustment used for performing the white balance adjustment are stored; and a control part 9 for controlling an operation of the liquid crystal TV set 1. The control part 9 has a CPU 11, a ROM 12, etc. The ROM 12 stores a chromaticity adjustment value for performing chromaticity adjustment of the color image. The control part 9, when receiving an adjustment starting signal by means of a wireless signal from a remote controller 80 for adjustment, reads the image data for adjustment stored in the image memory 5 for adjustment, performs chromaticity adjustment of the image for adjustment based on the image data for adjustment by using a chromaticity adjustment value stored in the ROM 12 and, thereafter, displays the image for adjustment subjected to chromaticity adjustment on the liquid crystal panel 3. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a liquid crystal image display device that displays a color image using a liquid crystal panel.

  Conventionally, as a liquid crystal image display device that displays a color image using a liquid crystal panel, a television broadcast signal distributed from a broadcasting station is received by a tuner, and an image based on image data based on the television broadcast signal is displayed on the liquid crystal panel. There is a so-called liquid crystal television device for displaying. In such a liquid crystal television, a chromaticity adjustment value for adjusting the chromaticity of a color image is stored in advance, and an image based on the image data is adjusted on the chromaticity adjustment value and displayed on the liquid crystal panel. It is supposed to be. Chromaticity adjustment is adjustment of the intensity of each color of red, green, and blue in an image, and is reflected in the hue of the entire image.

  By the way, there are individual differences in the liquid crystal panels of individual liquid crystal televisions. Therefore, even if the same chromaticity adjustment is performed on the same image with the same chromaticity adjustment value for each liquid crystal television, the individual liquid crystal televisions are different due to individual differences in the liquid crystal panels of the individual liquid crystal televisions. A difference occurs in the hue of the image displayed at.

  Therefore, in conventional LCD TVs, the chromaticity adjustment value can be adjusted before shipping in order to eliminate the difference in the hue of the displayed image on each LCD TV (that is, the difference in the hue of the displayed image due to individual differences in the liquid crystal panel). A certain white balance adjustment is performed.

  In this white balance adjustment, an adjustment image (for example, a white image having a predetermined color temperature) is adjusted on the chromaticity adjustment value and then displayed on the liquid crystal panel, and the color temperature of the displayed adjustment image is displayed. Is measured with a color temperature measuring instrument that is an external device, and the color temperature measurement value of the color temperature measuring instrument becomes a specified value (that is, the adjustment image displayed on the liquid crystal panel is white with the specified color temperature). This is done by adjusting the chromaticity adjustment value so that it becomes an image.

  At this time, the adjustment image is displayed by connecting the adjustment image input device, which is an external device, to the liquid crystal television and inputting the adjustment image data, which is the image data of the adjustment image, from the adjustment image input device. Is done. The image data for adjustment is input to the tuner of the liquid crystal television as an analog signal.

There is also known a digital camera that displays a captured image on a liquid crystal panel after adjusting the hue based on color information of the captured image (see, for example, Patent Document 1). There is also known a television receiver which displays an image based on image data based on a television broadcast signal on a picture tube after adjusting the hue based on an adjustment value stored in a ROM. (For example, refer to Patent Document 2). There is also known an imaging device that displays a captured image on a liquid crystal panel after adjusting the hue based on image data of a luminance unsaturated region of the captured image (for example, Patent Document 3). reference). There is also known an electronic camera that displays a captured image on a liquid crystal panel after adjusting the hue based on an adjustment coefficient calculated using a predetermined area of the captured image (for example, (See Patent Document 4). There is also known an imaging apparatus that adjusts the color of a captured image based on information on spectral transmittance of an interchangeable lens stored in a ROM (see, for example, Patent Document 5).
JP 2005-136854 A Utility Model Registration No. 3084700 JP 2007-142535 A Japanese Patent Laid-Open No. 2002-238055 JP 2002-232899 A

  By the way, in the above-described conventional liquid crystal television, when white balance adjustment is performed, an adjustment image input device which is an external device is connected to the liquid crystal television to display an adjustment image. It is necessary to input adjustment image data to the liquid crystal television. In other words, in order to efficiently perform white balance adjustment for a large number of mass-produced liquid crystal televisions, a large number of image input devices for adjustment are required, which increases costs.

  Also, since the adjustment image data output from the adjustment image input device is an analog signal, if the output level of the adjustment image data varies, the adjustment image itself will vary, and white balance adjustment will occur. Cannot be performed properly (even if white balance adjustment is performed, the difference in color of display images on individual liquid crystal televisions cannot be eliminated). Therefore, it is necessary to manage the output level of the adjustment image data in the adjustment image input device so that the output level of the adjustment image data does not vary.

  Further, in order to perform white balance adjustment, it is necessary to connect the adjustment image input device to the liquid crystal television, which is inefficient in work and increases manufacturing costs. Even if the contents disclosed in Patent Document 1 to Patent Document 5 described above are applied, the above problem cannot be solved.

  The present invention has been made to solve the above-described problem, and is a liquid crystal capable of displaying an adjustment image for performing white balance adjustment without using an external device for inputting adjustment image data. An object is to provide an image display device.

  In order to achieve the above object, the invention of claim 1 includes a liquid crystal panel for displaying a color image, and a chromaticity adjustment value memory storing a chromaticity adjustment value for adjusting the chromaticity of the color image, The color stored in the chromaticity adjustment value memory in the liquid crystal image display device that displays the image based on the image data on the liquid crystal panel after adjusting the chromaticity by the chromaticity adjustment value stored in the chromaticity adjustment value memory White balance adjustment means for performing white balance adjustment, which is an adjustment of the degree adjustment value, and an adjustment image memory storing adjustment image data which is image data of an adjustment image used for white balance adjustment by the white balance adjustment means In response to a predetermined operation or a predetermined signal input, an adjustment image based on the adjustment image data stored in the adjustment image memory is recorded in the chromaticity adjustment value memory. In terms of the chromaticity adjustment by chromaticity adjustment value that is one comprising an adjustment image displaying means for displaying on the liquid crystal panel.

  According to a second aspect of the present invention, in the liquid crystal image display device according to the first aspect of the present invention, an operation unit that is operated by a person to control the operation of the apparatus and transmits a radio signal corresponding to the operation, and an operation A receiving unit that receives a radio signal transmitted from the means, and the adjustment image display unit receives a predetermined signal input from the receiving unit as a radio signal and stores it in the adjustment image memory. The adjustment image based on the image data is displayed on the liquid crystal panel after adjusting the chromaticity by the chromaticity adjustment value stored in the chromaticity adjustment value memory.

  According to a third aspect of the present invention, in the liquid crystal image display device according to the first aspect, a color temperature measuring device for measuring the color temperature of the adjustment image displayed on the liquid crystal panel is connected and output from the color temperature measuring device. A measurement value input unit to which the measured value of the color temperature to be input is input, and the white balance adjustment means is configured to adjust the color of the adjustment image displayed on the liquid crystal panel based on the measurement value input from the measurement value input unit. The white balance adjustment is performed by automatically adjusting the chromaticity adjustment value stored in the chromaticity adjustment value memory so that the temperature falls within a predetermined range.

  According to a fourth aspect of the present invention, in the liquid crystal image display device according to the third aspect, the white balance adjustment means automatically measures the measured value when the adjustment image display means displays the adjustment image on the liquid crystal panel. White balance adjustment is performed based on the measurement value input from the input unit.

  According to a fifth aspect of the present invention, in the liquid crystal image display device according to the first aspect, a television broadcast signal distributed from a broadcasting station is received, and an image based on the image data based on the television broadcast signal is converted into a chromaticity adjustment value. The chromaticity is adjusted by the chromaticity adjustment value stored in the memory, and then displayed on the liquid crystal panel.

  According to the first aspect of the present invention, the adjustment image for performing the white balance adjustment is displayed on the liquid crystal panel based on the adjustment image data stored in the adjustment image memory. That is, an adjustment image for performing white balance adjustment can be displayed without using an external device for inputting adjustment image data. Accordingly, an external device for inputting the adjustment image data is unnecessary, and the cost is reduced. In addition, since the adjustment image data is stored as digital data in the adjustment image memory, it is not necessary to manage the output level of the adjustment image data. Further, it is not necessary to connect an external device for inputting image data for adjustment to the liquid crystal television, so that work efficiency can be improved and manufacturing cost can be reduced.

  According to the invention of claim 2, by transmitting a predetermined signal by a radio signal, the adjustment image can be displayed on the liquid crystal panel, and the working efficiency is improved.

  According to the invention of claim 3, the chromaticity adjustment value is automatically adjusted based on the measurement value of the color temperature input from the measurement value input unit, and the white balance adjustment is performed. Therefore, an operation for adjusting the chromaticity adjustment value is unnecessary, and the working efficiency is improved.

  According to the invention of claim 4, when the adjustment image is displayed, the white balance is automatically adjusted subsequently. Therefore, an operation for starting the white balance adjustment is unnecessary, and the work efficiency is improved.

  According to the invention of claim 5, the same effect as that of claim 1 can be obtained in an apparatus for displaying an image based on a television broadcast signal on a liquid crystal panel.

  Hereinafter, a liquid crystal image display device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a configuration of a liquid crystal television which is the liquid crystal image display device according to the present embodiment. The liquid crystal television 1 receives a television broadcast signal (hereinafter abbreviated as a television broadcast signal) distributed from a broadcasting station, displays an image based on the television broadcast signal, and outputs sound based on the television broadcast signal. It is.

  The liquid crystal television 1 includes a tuner 2, a liquid crystal panel 3, a speaker 4, an adjustment image memory 5, a measurement value input unit 6, a remote controller (remote controller) 7, a remote control receiver 8, and the liquid crystal television 1. A control unit 9 for controlling the operation is provided. The control unit 9 includes a CPU 11 and a ROM 12.

  The ROM 12 stores a program for controlling the operation of the liquid crystal television 1 and various data. In addition, the ROM 12 has chromaticity adjustment values (RGB gamma values) and luminance adjustments (Y gamma adjustment) for adjusting the chromaticity (RGB gamma adjustment) of the color image as various data for controlling the operation of the liquid crystal television 1. The brightness adjustment value (Y gamma value) for this is stored. Chromaticity adjustment is adjustment of the intensity of each color of red, green, and blue in a color image, and is reflected in the hue of the entire image. The chromaticity adjustment value includes an R gamma value that adjusts the intensity of red, a G gamma value that adjusts the intensity of green, and a B gamma value that adjusts the intensity of blue. These chromaticity adjustment values and luminance adjustment values are stored as an LUT (Look Up Table).

  The ROM 12 is a rewritable type, and the chromaticity adjustment value stored in the ROM 12 is adjustable (rewritable). In the initial state such as when the liquid crystal television 1 is shipped, the chromaticity adjustment value stored in the ROM 12 is a predetermined initial value. The ROM 12 constitutes a chromaticity adjustment value memory.

  The liquid crystal television 1 has a function of performing white balance adjustment, which is adjustment of chromaticity adjustment values stored in the ROM 12. The white balance adjustment is performed using two color analyzers 70 that are color temperature measuring devices for external devices and an external remote controller 80 for adjusting external devices.

  The color analyzer 70 measures the color temperature of the measurement object and outputs a color temperature measurement value indicating the measured color temperature. In response to a human operation, the adjustment remote controller 80 transmits an adjustment start signal (predetermined signal) indicating that white balance adjustment is to be performed by a radio signal.

  The tuner 2 receives a television broadcast signal under the control of the control unit 9, performs demodulation processing, A / D conversion processing, decoding processing, and the like on the received television broadcast signal, thereby generating an image image based on the television broadcast signal. Audio data based on the data and the TV broadcast signal is generated. The liquid crystal panel 3 displays an image based on the image data when the image data is supplied under the control of the control unit 9. The speaker 4 outputs sound based on the sound data when the sound data is supplied under the control of the control unit 9.

  The adjustment image memory 5 stores adjustment image data which is image data of an adjustment image used for white balance adjustment, and reference color temperature data indicating the color temperature of the adjustment image based on the adjustment image data. ing. The measurement value input unit 6 is used when white balance adjustment is performed. The color analyzer 70 is connected to the measurement value input unit 6 and the color temperature measurement value output from the color analyzer 70 is input.

  The remote controller 7 is operated by a person to control various operations of the liquid crystal television 1 such as power on / off of the liquid crystal television 1 and channel selection of the television broadcast signal, and an operation signal associated with the operation is transmitted as a radio signal. Send by. The remote control 7 constitutes operating means. The remote control receiver 8 receives the radio signal transmitted from the remote controller 7 and outputs a received signal corresponding to the received radio signal. In addition, the remote control receiving unit 8 receives the radio signal transmitted from the adjustment remote control 80 and outputs a reception signal corresponding to the received radio signal.

  The control unit 9 (CPU 11) performs a television image receiving operation for displaying an image based on a television broadcast signal, white balance adjustment based on a reception signal output from the remote control reception unit 8, and a program and various data stored in the ROM 12. Control various operations of the liquid crystal television 1 such as displaying an adjustment image. The control unit 9 (programs and various data stored in the CPU 11 and the ROM 12) and the like constitute white balance adjustment means and adjustment image display means.

  The television receiving operation is performed as follows under the control of the control unit 9. That is, the control unit 9 causes the tuner 2 to receive the television broadcast signal, and adjusts the brightness of the image based on the image data based on the television broadcast signal output from the tuner 2 using the brightness adjustment value stored in the ROM 12. Further, the chromaticity is adjusted by the chromaticity adjustment value stored in the ROM 12 and then displayed on the liquid crystal panel 3. In addition, the control unit 9 causes the speaker 4 to output sound based on sound data based on the television broadcast signal output from the tuner 2.

  The adjustment image is displayed under the control of the control unit 9 as follows. That is, the control unit 9 reads the adjustment image data stored in the adjustment image memory 5, and adjusts the adjustment image based on the read adjustment image data using the luminance adjustment value stored in the ROM 12. Then, the chromaticity is adjusted by the chromaticity adjustment value stored in the ROM 12 and then displayed on the liquid crystal panel 3. Therefore, the adjustment image is displayed on the liquid crystal panel 3 after brightness adjustment and chromaticity adjustment are performed in the same manner as an image based on image data based on a television broadcast signal in a television receiving operation. The control unit 9 displays such an adjustment image when an adjustment start signal is received from the adjustment remote controller 80.

  In the white balance adjustment, the color analyzer 70 is connected to the signal input unit 6, the adjustment image is displayed on the liquid crystal panel 3 as described above, and the color temperature of the adjustment image displayed on the liquid crystal panel 3 is adjusted. In a state where the measurement is performed by the color analyzer 70, the control is performed as follows under the control of the control unit 9. That is, the control unit 9 determines the color temperature of the adjustment image displayed on the liquid crystal panel 3 based on the color temperature measurement value (color temperature measurement value measured by the color analyzer 70) input from the measurement value input unit 6. Is automatically stored in the ROM 12 so that is within a predefined range (within a predefined range centered on the color temperature indicated by the reference color temperature data stored in the adjustment image memory 5). Adjust (rewrite) the chromaticity adjustment value. The control unit 9 automatically performs such white balance adjustment after the adjustment image is displayed on the liquid crystal panel 3.

  FIG. 2 shows an adjustment image used for the white balance adjustment. The adjustment image 90 includes a first area image 91 and a second area image 92. The first area image 91 is an image that is ideal for the liquid crystal panel 3 (image quality change does not occur due to the transparent substrate of the liquid crystal panel 3, a polarizing plate, a liquid crystal layer, a color filter, a backlight light source, etc.). Is an image with a color temperature of 12000k (observed in white) and a luminance level (luminance level with respect to the maximum luminance level that can be output) of 70%. . The second region image 92 is an image having a color temperature of 12000k and a luminance level of 25% when the liquid crystal panel 3 is assumed to be ideal. That is, the adjustment image 90 has a color temperature of 12000k (the color temperature of 12000k, which is the same as the first region image 91 and the second region image 92), and the luminance level of the first region image 91 and the second region image 92 is high. It is a different image.

  The adjustment image memory 5 stores image data obtained by converting such an adjustment image 90 into digital data as adjustment image data, and a reference indicating that the color temperature of the adjustment image 90 is 12000 k. Stores color temperature data.

  When such an adjustment image 90 is displayed on a liquid crystal panel 3 that is actually produced (not ideal), the liquid crystal panel 3 is caused by a transparent substrate, a polarizing plate, a liquid crystal layer, a color filter, a backlight light source, and the like. Since the image quality is changed, the color temperature of the adjustment image 90 displayed on the liquid crystal panel 3 is different from 12000k. In addition, individual liquid crystal panels 3 have variations in image quality due to individual differences in the transparent substrate, polarizing plate, liquid crystal layer, color filter, backlight light source, and the like of the liquid crystal panel 3 (that is, individual differences in the liquid crystal panel). A difference occurs in the color temperature of the adjustment image 90 displayed on the screen. The difference in the color temperature of the adjustment image 90 displayed on each liquid crystal panel 3 is the difference in the hue of an arbitrary color image displayed on each liquid crystal panel 3.

  In the white balance adjustment, such an adjustment image 90 is displayed on the liquid crystal panel 3 after the chromaticity adjustment is performed using the chromaticity adjustment value stored in the ROM 12, and the adjustment image displayed on the liquid crystal panel 3. The chromaticity adjustment value stored in the ROM 12 is adjusted so that the color temperature of the image 90 falls within a pre-defined range centered on 12000k. That is, the color temperature of the adjustment image 90 displayed on the liquid crystal panel 3 is measured by two color analyzers 70 (one color analyzer 70 measures the color temperature of the first area image 91 and the other color analyzer 70 uses the second color analyzer 70 to measure the color temperature. The chromaticity adjustment value stored in the ROM 12 is measured so that the color temperature measurement value measured by the color analyzer 70 is within a pre-defined range centered on 12000k. adjust.

  By performing white balance adjustment in this way for each liquid crystal panel 3, the color temperature of the adjustment image 90 displayed on each liquid crystal panel 3 can be made the same. This eliminates a difference in hue of an arbitrary image (image based on a television broadcast signal) displayed on the liquid crystal panel 3 of each liquid crystal television 1 (that is, a difference in hue of a display image due to individual differences of the liquid crystal panel 3). Can do.

  FIG. 3 shows an operation flowchart of the adjustment image display and white balance adjustment. In the white balance adjustment, two color analyzers 70 are connected to the measurement value input unit 6 and set in front of the liquid crystal panel 3 so that the color temperature of the image displayed on the liquid crystal panel 3 can be measured. Done.

  First, when the adjustment remote control 80 is operated and an adjustment start signal is input to the remote control receiving unit 8 (that is, the adjustment start signal is received from the adjustment remote control 80) (YES in # 1), the control unit 9 The adjustment image data is read from the adjustment image memory 5 (# 2). Subsequently, the control unit 9 performs Y gamma adjustment (brightness adjustment) processing on the read adjustment image data using the Y gamma value (brightness adjustment value) stored in the ROM 12 (# 3), and further Then, RGB gamma adjustment (chromaticity adjustment) processing is performed using the RGB gamma value (chromaticity adjustment value) stored in the ROM 12 (# 4). Then, the control unit 9 supplies the adjustment image data after the adjustment processing to the liquid crystal panel 3, and causes the liquid crystal panel 3 to display an adjustment image based on the adjustment image data after the adjustment processing (# 5).

  As a result, the adjustment image based on the adjustment image data stored in the adjustment image memory 5 is displayed on the liquid crystal panel 3 after being subjected to RGB gamma adjustment by the RGB gamma value stored in the ROM 12. The color temperature of the adjustment image that has been RGB gamma adjusted by the RGB gamma value stored in the ROM 12 is measured by the color analyzer 70, and the color temperature measurement value output from the color analyzer 70 is the measured value input unit. 6 is input.

  Thereafter, the control unit 9 automatically takes in the color temperature measurement value (color temperature measurement value output from the color analyzer 70) input from the measurement value input unit 6 (# 6), and the color temperature measurement value. Is within a prescribed range (within a prescribed range preliminarily defined with reference to the color temperature indicated by the reference color temperature data stored in the adjustment image memory 5) (# 7).

  Here, if the color temperature measurement value is not within the specified range (NO in # 7), the control unit 9 automatically performs the RGB gamma value (R gamma value, G gamma value, B gamma) stored in the ROM 12. (Value) is adjusted (rewritten) (# 8). At this time, the control unit 9 compares the color temperature indicated by the color temperature measurement value with the color temperature indicated by the reference color temperature data stored in the adjustment image memory 5, and according to the comparison result, the color temperature measurement value. The RGB gamma value is changed by a predetermined value so that the difference between the color temperature indicated by the reference color temperature and the color temperature indicated by the reference color temperature data decreases.

  Thereafter, the control unit 9 automatically repeats the processes after # 4. As a result, the adjustment image based on the adjustment image data stored in the adjustment image memory 5 is automatically subjected to the RGB gamma adjustment by the RGB gamma value after the adjustment in the process of # 8, and then the liquid crystal. The color temperature of the adjustment image displayed on the panel 3 and adjusted by the RGB gamma value after being adjusted in the process of # 8 is measured by the color analyzer 70, and the measured color temperature value is It is determined whether it is within the specified range.

  The processes of # 4 to # 8 are repeated until the color temperature measurement value falls within the specified range in # 7. If the color temperature measurement value is within the specified range in # 7, the control unit 9 determines that the RGB gamma value is properly adjusted, and ends the display of the adjustment image and the white balance adjustment.

  By repeating the processes of # 4 to # 8, the RGB gamma stored in the ROM 12 is automatically stored so that the color temperature of the adjustment image displayed on the liquid crystal panel 3 is within a predetermined range. The value is adjusted. In addition, after the process of # 5, the process after # 6 is automatically performed, and after the adjustment image is displayed on the liquid crystal panel 3, the white balance is automatically adjusted. In addition, when the adjustment remote controller 80 is operated and an adjustment start signal is input from the remote control receiver 8, the adjustment image is automatically displayed and white balance adjustment is performed.

  According to the liquid crystal television 1 having such a configuration, an adjustment image for performing white balance adjustment is displayed on the liquid crystal panel 3 based on the adjustment image data stored in the adjustment image memory 5. That is, an adjustment image for performing white balance adjustment can be displayed without using an external device for inputting adjustment image data. Accordingly, an external device for inputting the adjustment image data is unnecessary, and the cost is reduced. Moreover, since the adjustment image data is stored as digital data in the adjustment image memory 5, it is not necessary to manage the output level of the adjustment image data. Further, it is not necessary to connect an external device for inputting the adjustment image data to the liquid crystal television 1, so that the work efficiency can be improved and the manufacturing cost can be reduced.

  Further, the adjustment image can be displayed on the liquid crystal panel 3 simply by operating the adjustment remote controller 80 and transmitting the adjustment signal from the adjustment remote controller 80, and the working efficiency is improved. In addition, when the adjustment image is displayed on the liquid crystal panel 3, the white balance adjustment is automatically performed subsequently, so that an operation for starting the white balance adjustment is unnecessary, and the work efficiency is improved. Furthermore, since the RGB gamma value is automatically adjusted based on the color temperature measurement value input from the measurement value input unit 6, an operation for adjusting the RGB gamma value is unnecessary, and the work efficiency is improved.

  In addition, this invention is not restricted to the structure of the said embodiment, A various deformation | transformation is possible. For example, instead of transmitting an adjustment start signal from the adjustment remote controller, when a predetermined operation is performed on the remote control, the adjustment start signal is transmitted from the remote control and the adjustment start signal is received from the remote control. The adjustment image may be displayed, or an adjustment button may be provided on the liquid crystal television, and the adjustment image may be displayed in response to the operation of the adjustment button. Further, the adjustment image is not limited to the image of the above embodiment, and may be another image. Further, an adjustment knob for adjusting the RGB gamma value may be provided in the liquid crystal television, and the RGB gamma value stored in the ROM may be adjusted according to the operation of the adjustment knob. The present invention is not limited to a liquid crystal television, and other liquid crystal image display devices such as a liquid crystal image display device used by being connected to an AV device such as a DVD player, a liquid crystal image display device used for a personal computer, and the like. It is also applicable to. The present invention can also be applied to a liquid crystal image display device that captures an image and displays the captured image on a liquid crystal panel.

1 is an electrical block configuration diagram showing a schematic configuration of a liquid crystal television according to an embodiment of the present invention. The figure which shows the image for adjustment used in order to perform white balance adjustment of the liquid crystal television. 7 is a flowchart showing operations for displaying an adjustment image and white balance adjustment of the liquid crystal television.

Explanation of symbols

1 LCD TV (Liquid Crystal Display)
2 Tuner 3 Liquid crystal panel 4 Speaker 5 Image memory for adjustment 6 Measurement value input unit 7 Remote control (operating means)
8 Remote control reception unit 9 Control unit (white balance adjustment means, adjustment image display means)
11 CPU
12 ROM (chromaticity adjustment value memory)
70 Color analyzer (color temperature measuring device)
80 Remote controller for adjustment 90 Image for adjustment 91 First area image 92 Second area image

Claims (5)

A liquid crystal panel for displaying a color image and a chromaticity adjustment value memory storing chromaticity adjustment values for adjusting the chromaticity of the color image, and storing an image based on image data in the chromaticity adjustment value memory In the liquid crystal image display device for displaying on the liquid crystal panel after adjusting the chromaticity by the chromaticity adjustment value being performed,
White balance adjustment means for performing white balance adjustment, which is adjustment of the chromaticity adjustment value stored in the chromaticity adjustment value memory;
An adjustment image memory storing adjustment image data which is image data of an adjustment image used for white balance adjustment by the white balance adjustment means;
In response to a predetermined operation or a predetermined signal input, an adjustment image based on the adjustment image data stored in the adjustment image memory is converted into a chromaticity by the chromaticity adjustment value stored in the chromaticity adjustment value memory. An image display means for adjustment to be displayed on the liquid crystal panel after adjustment,
A liquid crystal image display device comprising: An operating means that is operated by a person to control the operation of the apparatus and transmits a radio signal associated with the operation;
A receiver that receives a radio signal transmitted from the operation means;
The adjustment image display means receives the predetermined signal input by a radio signal from the reception unit, and displays an adjustment image based on the adjustment image data stored in the adjustment image memory in the chromaticity adjustment value memory. After adjusting the chromaticity according to the chromaticity adjustment value stored in, display on the liquid crystal panel,
The liquid crystal image display device according to claim 1. A color temperature measuring device for measuring the color temperature of the image for adjustment displayed on the liquid crystal panel is connected, and a measurement value input unit for inputting a measured value of the color temperature output from the color temperature measuring device is further provided. ,
The white balance adjusting means automatically adjusts the color temperature of the adjustment image displayed on the liquid crystal panel based on a measurement value input from the measurement value input unit so that the color temperature is within a predetermined range. The white balance adjustment is performed by adjusting the chromaticity adjustment value stored in the chromaticity adjustment value memory.
The liquid crystal image display device according to claim 1. The white balance adjustment means automatically adjusts the white balance based on the measurement value input from the measurement value input unit when the adjustment image display means displays the adjustment image on the liquid crystal panel. Make adjustments,
The liquid crystal image display device according to claim 3. After receiving a television broadcast signal distributed from a broadcasting station, and adjusting the chromaticity by the chromaticity adjustment value stored in the chromaticity adjustment value memory, the image based on the image data based on the television broadcast signal, Displaying on the liquid crystal panel;
The liquid crystal image display device according to claim 1.

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