JPH11355797A - Liquid crystal color display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal color display device capable of realizing display in optimum color at all times regardless of the color temperature of an external light source and realizing miniaturization and weight reduction of a device. SOLUTION: This liquid crystal color display device 2 for displaying electronic image signals is provided with a white balance sensor 7 for detecting the color component of ambient light and adjusting the color gain of plural color component signals for forming the image signals to be inputted based on the detected color component information and a white balance sensor 7 is disposed on a display screen on a liquid crystal circuit board (display part 3).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color liquid crystal display device, and more particularly to a color liquid crystal display device for displaying an electronic image and the like, and particularly to a reflection type liquid crystal display (LC).
The present invention relates to a color liquid crystal display device utilizing D).

[0002]

2. Description of the Related Art In recent years, various devices for recording or reproducing and displaying electric signals as moving images or still images, for example, video tape recorders (VTRs), digital video disc (DVD) players, televisions (TV), and electronics. In various small devices, such as image recording / reproducing devices such as dynamic imaging devices (digital still cameras), and information devices such as personal computers (PCs) that handle various types of electronic information including digitized image information. A liquid crystal display device using a liquid crystal display or the like is widely used as a display device.

This liquid crystal display device includes a liquid crystal display (LC)
A so-called transmissive liquid crystal display in which lighting means such as a fluorescent lamp (hereinafter referred to as a backlight) is provided behind D) so that the display screen of the liquid crystal display unit can be visually recognized by the transmitted light of the backlight. A liquid crystal display (hereinafter referred to as an LCD) and a reflector provided on the back side of the liquid crystal display unit, and reflecting external light (ambient light) incident from the front side of the liquid crystal display unit on the reflector, the liquid crystal display. Some use a so-called reflective LCD in which a display unit is illuminated so that a display on a display screen can be visually recognized.

[0004] In recent years, various types of small devices such as those described above, which are constructed using such a liquid crystal display device, have been designed so that they can be used even outdoors, for example, by improving portability. Lightening and weight reduction are desired.

[0005] In a normal transmission type liquid crystal display device, since a predetermined backlight is used as a light source, the liquid crystal display portion can always be illuminated with a constant illumination light, so that a stable display can always be performed. In addition, there is a problem in that a large amount of power is required to drive the backlight, and in a field or the like where stable power supply cannot be received, the usable time is limited. Further, when the ambient light is bright, for example, under direct sunlight, the visibility of the liquid crystal display unit may be deteriorated.

On the other hand, a general reflection type liquid crystal display device is:
Since the ambient light is used as the illumination light source for the liquid crystal display, the backlight can be eliminated,
As a result, there is an advantage that the device itself can be easily reduced in thickness and size and reduced in power consumption. Therefore,
In recent years, reflection-type liquid crystal display devices are generally used in practice because reflection-type liquid crystal display devices are advantageous when used in small devices designed in consideration of use in the outdoors. Is being transformed.

However, in this reflection type liquid crystal display device,
For example, due to a difference in color temperature of a light source in an environment of use (ambient light) or the like, a color balance or the like of a displayed image is broken and unnatural color reproduction is performed. There are cases.

[0008] Usually, the color temperature of sunlight is about 4000 ° K.
６6000 ° K. The color temperature of the fluorescent lamp is a higher value, for example, about 12000 ° K (there are various types depending on the type of the fluorescent lamp), and these color temperatures are specific to the type of light source. Is the numerical value of.

Therefore, in a transmission type liquid crystal display device, by setting a correction value such as a color balance in consideration of a color temperature of a backlight light source to a predetermined value, the correction value is always influenced by a color temperature of ambient light. A stable image can be displayed.

However, in the reflection type liquid crystal display device, the color reproducibility such as the color balance of the displayed image is affected by the color temperature of the ambient light. Even if the adjusted color balance correction value is set to a predetermined value, if this is used under fluorescent light,
The display is affected by the color temperature of the fluorescent lamp, for example, resulting in a bluish display result.

Therefore, in the conventional reflection type liquid crystal display device, even when the ambient light (light source) of the use environment is different, it is possible to avoid an image in which the color balance is disturbed, and to always perform display with an optimum color tone. In order to execute the correction, it is necessary to perform a correction corresponding to the color temperature of the ambient light.

By the way, various types of transmissive liquid crystal display devices which use a backlight and ambient light have been proposed. Even in such a device, when performing display using ambient light, it is necessary to correct the color balance corresponding to the color temperature of the ambient light, as in the case of the reflective liquid crystal display device. It is.

For example, an image display device disclosed in Japanese Patent Laid-Open No. Hei 5-91376 is configured so that a backlight or an external light source can be selected as a light source for illuminating a liquid crystal display unit. Apart from the use of a backlight having a constant color temperature, when using ambient light in which the color temperature may change, white light is output based on an output signal of a white balance sensor (hereinafter abbreviated as a WB sensor). By peripheral circuits such as a balance (WB) processing circuit,
A video or image signal (R) based on a correction value corresponding to an ambient light source
A correction process for the GB signal) is performed, and this is displayed on the liquid crystal display unit.

[0014]

However, according to the means disclosed in JP-A-5-91376,
A WB sensor and a WB processing circuit are newly required, and a space for arranging these members inside the device is required. Therefore, the size of the device itself is increased, which hinders downsizing of a device using the device. Problem.

Further, in order to accurately measure the color temperature of the external light source, it is necessary to arrange the light receiving surface (detection directivity) of the WB sensor so as to face a direction substantially coincident with the display surface of the liquid crystal display unit. For this reason, it is desirable to arrange the WB sensor near the display surface of the liquid crystal display unit.

However, according to the means disclosed in the above publication, the liquid crystal display unit of the liquid crystal display device and the W
It is considered difficult to always ideally arrange the B sensor.

As described above, in order to meet the demand for miniaturization and weight reduction of the device, various devices are configured by using the reflection type liquid crystal display device which can easily realize the thinning, and further, the above-described color is obtained. When the means disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 5-91376 is applied to solve the problems such as reproducibility, the size and weight of the device itself can be reduced, and the optimum WB
It can be said that it is very difficult to realize the arrangement of the sensors together.

In addition, it is necessary to consider the arrangement of members to be added such as a WB processing circuit and the like, and it is difficult for the means disclosed in the publication to sufficiently realize the demand for miniaturization of the apparatus itself. It is.

The present invention has been made in view of the above points, and an object of the present invention is to provide a small-sized image display device using a reflection type color liquid crystal display device.
It is an object of the present invention to provide a color liquid crystal display device capable of always realizing display with optimum color reproduction irrespective of the color temperature of an external light source (ambient light) and realizing size reduction and weight reduction of the device.

It is another object of the present invention to provide a color liquid crystal display device capable of realizing a further miniaturization by efficiently arranging the components, electric circuit members and the like disposed inside the device.

[0021]

To achieve the above object, a color liquid crystal display device according to a first aspect of the present invention is a color liquid crystal display device for displaying an electronic image signal as an image. Detected, comprises a white balance sensor for adjusting the color gain of a plurality of color component signals forming an image signal input based on the detected color component information, this white balance sensor,
It is provided on the display surface side of the liquid crystal circuit board.

According to a second aspect, in the color liquid crystal display device according to the first aspect, a plurality of image signals corresponding to an image to be displayed on a display screen are formed based on a signal of the white balance sensor. Color balance signal adjusting means for adjusting the color gain of the color component signal, wherein the color balance adjusting means is formed integrally with a display unit for displaying an image.

[0023] The third invention is directed to the first or second embodiment.
In the color liquid crystal display device according to the present invention, the display section comprises a reflective color liquid crystal display member capable of displaying an image using only reflected light.

According to a fourth aspect, in the color liquid crystal display device according to the second or third aspect, a plurality of color gains for adjusting a color gain of an image signal corresponding to an image displayed on the display unit are provided. A storage unit in which the adjustment value is recorded in advance; and a color gain adjustment value selection unit capable of selecting a predetermined adjustment value from a plurality of color gain adjustment values recorded in the storage unit. The value selection means is
A predetermined color gain adjustment value can be selected from a plurality of adjustment values recorded in the storage unit according to the output of the white balance sensor, and a plurality of color gain adjustment values recorded in the storage unit according to ambient light in a shooting environment. It is characterized in that a desired color gain adjustment value can be arbitrarily selected from the adjustment values.

According to a fifth aspect, in the color liquid crystal display device according to the first aspect, the second aspect, or the third aspect, the white balance sensor has a detection directivity and a viewing direction of the display unit. It is characterized by being arranged so as to substantially match.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. FIG. 1 is an external perspective view showing a schematic configuration of a color liquid crystal display device according to an embodiment of the present invention,
It shows a state viewed from the back side (the back side of the display unit) of the color liquid crystal display device.

The color liquid crystal display of this embodiment (hereinafter referred to as the
An LCD device (hereinafter simply referred to as an LCD device) 2 is composed of a liquid crystal member such as a liquid crystal display for displaying an electric signal as a color image. And other connecting means 5 (only the flexible printed circuit board is shown in FIG. 1) such as a flexible printed circuit board or a lead wire for transmitting an electric signal. It is supported by the member 4.

The display unit 3 includes a liquid crystal circuit board including a data line driving circuit and a driving line driving circuit, a liquid crystal display (hereinafter simply referred to as LCD), and the like, as shown in FIG. For example, a general reflection type LCD including a liquid crystal member, a color filter, a reflection plate, and the like is used.

An LCD interface (I / F) 6, which is a white balance (WB) processing circuit, is integrally provided on the back surface 2b of the display unit 3 on the liquid crystal circuit board. On the front side of the display unit 3, that is, at a predetermined position on the outer peripheral edge of the liquid crystal circuit board on the display surface 2a side,
A white balance (WB) sensor 7 is provided with its light receiving surface facing outward. In other words, the light receiving surface of the WB sensor 7 and the display surface 2a of the display unit 3 are disposed so as to face directions substantially matching each other.

An example in which the LCD device 2 configured as described above is applied to an electronic imaging device for recording and reproducing an electric still image and the like will be described below. FIG. 2 shows a rear view of an electronic imaging device to which the LCD device 2 of the present embodiment is applied. FIG. 3 is a block diagram showing the internal configuration of the electronic imaging apparatus. 2 and 3
In order to avoid complication of the drawings, only the members related to the present invention are illustrated, and the other members have a general configuration, and are not illustrated and detailed description is omitted.

The electronic image pickup apparatus 1 includes the above-described LCD device 2
Are integrally formed. The LCD device 2 is disposed substantially at the center of the back of the electronic imaging device 1, and its display surface 2 a is disposed outward on the back side of the electronic imaging device 1. . LCD device 2
As described above, the WB sensor 7 is disposed at a predetermined position on the outer peripheral edge of the display surface 2a so that its light receiving surface faces a direction substantially coincident with the display surface 2a.

In the vicinity of the LCD device 2, there is provided an operation means 8 comprising a plurality of operation switches including a white balance (WB) selection switch 8a as a color gain adjustment value selection means. A release switch 8b, which is an operation button for generating a release signal or the like, is provided at one end on the upper surface side of 1. In the following description, these operation switches are collectively referred to as an operation unit 8 unless individual operation buttons are indicated.

Various components for recording a subject image as an electric signal are arranged inside the electronic imaging apparatus 1 as follows. The electronic imaging apparatus 1 is roughly formed of an imaging unit, an image processing unit, an image display unit, and the like. First, an imaging unit and an image processing unit of the electronic imaging device 1 will be described below.

As shown in FIG. 3, a photographing lens system 11 for forming a subject image, an image pickup device 12 such as a CCD for photoelectrically converting the subject image formed by the photographing lens system 11 into an electric signal, An imaging process circuit 13 for performing predetermined image processing or the like on the image signal photoelectrically converted by the imaging device 12, and an A for converting the image signal (analog signal) from the imaging process circuit 13 into a digital signal.
A / D conversion circuit 14, a memory 15 such as a nonvolatile memory for storing image signals digitized by the A / D conversion circuit 14, and control of a CPU or the like for controlling the entire electronic imaging apparatus 1 Data processing and compression processing are performed in such a manner that the digital image signal stored in the memory 15 can be recorded on the recording medium 17 and the digital image signal stored in the memory 15 is recorded on the recording medium 17 in a compressed state. A compression / expansion circuit 16 for performing a decompression process or the like for reading a plurality of image signals and performing various image processing on the read image signals; a recording medium 17 such as a memory card; A recording / reproduction control circuit 18 for controlling the reproduction operation, and an output from the recording / reproduction control circuit 18 are converted into, for example, an RGB signal or a Y color difference signal (in the present embodiment, R A D / A conversion circuit 19 for converting the analog signal into a B signal and outputting the analog signal; and an LCD device according to the present embodiment, which is an image display device that receives the image signal (RGB signal) and displays an image on a display screen. 2 (Fig. 1
FIG. 2), a power supply 22 for supplying power to the electronic imaging device 1, and a voltage D from the power supply 22 for converting the voltage from the power supply 22 into a voltage value optimal for an internal electric circuit of the electronic imaging device 1.
C / DC converter 21 and system controller 10
And a plurality of operation switches (8a, 8b) for inputting various kinds of instruction signals.

As described above, the image pickup section and the image processing section of the electronic image pickup apparatus 1 have basically the same configuration as that of the conventional general electronic image pickup apparatus. is there.

Next, the details of the LCD device 2 as the image display means of the electronic imaging device 1 will be described below.

As described above, the LCD device 2 receives the state of ambient light in the photographing environment and converts it into an electric signal.
A B sensor 7, a WB processing circuit 6 that receives (outputs) the output of the WB sensor 7 and measures (estimates) the color temperature of ambient light, a display unit 3 that displays an image, and corrects a plurality of predetermined color balances. Look-up table 23 (LUT; see Table 1) comprising a ROM or the like in which correction values for performing correction are recorded.
And an image signal (RGB signal) from outside the LCD device 2
R, G, etc., which amplify the color gain value and the like so as to obtain an optimal form for displaying this on the display unit 3.
-Three gain amplifiers 24R, 24G, 24B of B;
LCD signal control unit 25 for controlling an input signal to display unit 3
And so on.

The WB sensor 7 has, for example, the following configuration. That is, it is constituted by a photodiode serving as a light receiving element, an RGB filter disposed on a light receiving surface in front of the photodiode, and the like. RG
The B filter is attached to the light receiving surface of the photodiode, or is formed integrally with the photodiode (on-chip).

The WB processing circuit 6 performs predetermined processing on an input signal (RGB signal) from the WB sensor 7.
Logarithmic compression amplifier 31 and A / D conversion circuit 32 for digitally converting the output signal of RGB logarithmic compression amplifier 31
And an arithmetic circuit 33 for performing a predetermined operation on the digitized electric signal for white balance, that is, a predetermined operation for calculating [R / G], [B / G], and the like. RB based on the operation result and LUT 23
It is composed of an RB gain constant setting circuit 34 for setting a gain constant (correction value), an output circuit 35 set by the gain constant setting circuit 34 and outputting a correction value, and the like.

The display section 3 is composed of a liquid crystal display (hereinafter, referred to as LCD) section composed of a liquid crystal member and the like, and a data line drive circuit / drive line drive circuit provided for driving the LCD.

The color liquid crystal display device 2 of the present embodiment
Lookup table (LUT) prepared in advance
Table 1 shows an example of 23).

[0042]

[Table 1] L in the electronic imaging device 1 thus configured
The operation of the CD device 2 will be described below. First, the WB sensor 7 provided integrally with the LCD device 2 receives ambient light incident from the display surface 2a side of the LCD device 2. In this case, the WB sensor 7 receives the ambient light through the three filters R, G, B, and outputs the three electrical signals, R, G, B, to the logarithmic compression amplifier 31 for RGB.

The RGB logarithmic compression amplifier 31 performs a logarithmic compression process for compressing the amplitude of the input RGB signals and outputting the resulting signal. Thereafter, the R, G, and B image signals are digitally converted in the A / D conversion circuit 32, and the digital signals are output to the arithmetic circuit 33. Further, the arithmetic circuit 33 performs a predetermined operation, an operation for detecting a color component, and the like on the input RGB signals. That is, using the G signal as a reference (denominator) [R
/ G] signal and [B / G] signal are calculated. And
Both signals are output to the RB gain constant setting circuit 34.
The relationship between the two outputs of the WB sensor 7, that is, [R
The relationship between the [/ G] signal and the [B / G] signal is as shown in FIG.

In this state, for example, when the WB selection switch 8a is operated by an operator or the like, a signal is generated to instruct execution of the automatic white balance adjustment operation. Then, in response to this, the system controller 10
Controls the RB gain constant setting circuit 34 so that the LUT 2
With reference to the data of No. 3, a correction value (constant) for correcting the calculation result by the calculation circuit 33 is set. This correction value is for enabling an image signal or the like of a subject image acquired by the imaging device 12 of the electronic imaging device 1 to be displayed on the display unit 3 of the LCD device 2 as an optimal image.

The correction value set by the RB gain constant setting circuit 34 is applied to three gain amplifiers 24R and 24 provided for each of R, G, and B color components via an output circuit 35.
G · 24B.

On the other hand, the electronic imaging device 1 (FIGS. 2 and 3)
) Converts an image signal of a subject image acquired by the image sensor 12 or an image signal recorded on a recording medium or the like into a D / A signal.
R, G, and B as analog signals by the conversion circuit 19
, And converts each video signal into three gain amplifiers 24R, 24G,
24B. Thereby, the LC of the display unit 3
D can be displayed as an image. At this time, the subject image forming the image signal acquired by the electronic imaging device 1 is usually placed in a direction substantially coincident with the ambient light incident on the WB sensor 7.

Therefore, the RB gain constant setting circuit 34
Is the result of the detection of the color component by the WB sensor 7 [R
/ G] and [B / R] signals, based on both output signals.
With reference to T23, the setting value of the ambient light at the shooting location is converted into a constant. The set value (correction value) is output to each of the gain amplifiers 24R, 24G, and 24B as described above.

On the other hand, in the image pickup section of the electronic image pickup apparatus 1 as described above, the subject image formed on the image pickup device 12 by the photographing lens system 11 is photoelectrically converted by the image pickup device 12. The electric signal generated by the image pickup device 12 is subjected to predetermined image processing or the like to be performed in advance in an image pickup process circuit 13, then converted into a digital signal by an A / D conversion circuit 14, and temporarily stored in a memory 15. Will be recorded. Then, the digital image signal recorded in the memory 15 is recorded on the recording medium 17 via the compression / expansion circuit 16.

Further, the image signal of the memory 15 is also output to a D / A conversion circuit 19 via a compression / expansion circuit 16 and a recording / reproduction control circuit 18. In the D / A conversion circuit 19, after the three video signals of R, G and B are converted into digital image signals, the respective video signals are converted into respective gain amplifiers 24R, 24G and 24B of R, G and B. Is output to

This gain amplifier 24R / 24G / 24B
Then, based on the correction value (predetermined value set by the RB gain constant setting circuit 34) output from the output circuit 35 of the LCD interface 6, each video signal (R, G, B signal) is corrected to a signal that can be displayed on the display screen of the LCD display unit 3 as an image that has been subjected to optimal white balance adjustment. Then, the image signal subjected to the optimal color balance correction is
The image is output to the display unit 3 via the LCD signal control unit 25 and is displayed as an image on the display screen of the display unit 3.

As described above, according to the first embodiment, the WB sensor 7 for detecting the state of the peripheral light source, and the WB process for adjusting the color balance and the like based on the signal from the WB sensor 7 Since the circuit 6 and the circuit 6 are arranged integrally with each other, the number of members and the mounting space can be reduced.

The display unit 3 is formed integrally with the WB processing circuit 6 and the WB sensor 7 to form a unit.
Since the connection means 5 such as a flexible printed circuit board or a lead wire for electrically connecting the B sensor 7 and the WB processing circuit 6 to the display unit 3 can be made unnecessary or shortened, a video signal to be transmitted is provided. And the like, and deterioration of image signals caused by mixing of electromagnetic wave noise and the like can be suppressed, so that it is easy to realize high image quality of a display result.

Further, by arranging the display surface 2a of the display unit 3 so as to substantially coincide with the light receiving surface of the WB sensor 7, the WB
The detection directivity of the sensor 7 and the viewing direction of the display unit 3 can be substantially matched, and the state of ambient light (color temperature) can be more accurately determined.
Can be detected. This makes it possible to perform optimal color balance adjustment and display an image with more accurate color reproducibility.

Also, in a small reflective color liquid crystal display device which does not require components such as a backlight, a WB sensor 7 and a WB processing circuit 6 are provided to form a display image in accordance with the situation of ambient light. The size and weight of the device can be easily reduced by unitizing the display unit 3 while adding an automatic white balance (AWB) function for automatically correcting the color balance (white balance) of the image signal to be reproduced. .

In addition to the mode for operating the auto white balance function, a value corresponding to a special light source such as a mercury lamp or a sodium lamp is set in the lookup table in advance, and an appropriate value is set by the WB selection switch 8a. By incorporating a selectable manual mode, a color liquid crystal display device that can easily cope with a special light source can be provided.

In the color liquid crystal display device 2 according to the embodiment, as shown in FIG.
Although the processing circuit 6 and the WB sensor 7 are configured as a unit, the configuration is not limited to this, and a configuration such as that shown in FIGS. 6 and 7 may be used.

FIGS. 5, 6, and 7 show the WB processing circuit 6 and WB in the display unit 3 of the color liquid crystal display device 2 according to the present invention.
FIG. 4 is a diagram illustrating an example of the arrangement of sensors 7;

FIG. 5 shows an arrangement of the WB processing circuit 6 and the WB sensor 7 in the display unit 3 of the embodiment. In this example, as described above, the W
The B processing circuit 6 and the WB sensor 7 are integrally formed.

In the arrangement example of FIG. 6, the WB processing circuit 6 is integrally provided on the back surface 2b side of the display unit 3, and the WB sensor 7 is formed separately. And the sensor 7 and WB
The connection with the processing circuit 6 is electrically connected by connection means such as a lead wire. With such a configuration, the degree of freedom in the arrangement of the WB sensor 7 can be ensured. However, it is necessary to arrange the detection directivity of the WB sensor 7 so as to substantially coincide with the viewing direction of the display surface (2a) of the display unit 3.

In the arrangement example of FIG. 7, contrary to the example of FIG. 6, the WB sensor 7 is integrally disposed on the surface (2a) side of the display unit 3, and the WB processing circuit 6 is formed separately. doing. Then, the sensor 7 and the WB processing circuit 6 are electrically connected by connecting means such as lead wires as in the example of FIG. With such a configuration, it is possible to always ensure that the detection directivity of the WB sensor 7 and the viewing direction of the display surface (2a) of the display unit 3 substantially match each other. It is possible to easily secure the degree of freedom of arrangement.

On the other hand, as described in the above-described embodiment, it is desirable that the detection directivity of the WB sensor 7 and the viewing direction of the display unit 3 be arranged so as to substantially coincide with each other. In consideration of the fact that the light flux from the light source is normally irradiated from substantially above, for example, when the display surface of the display unit 3 is arranged toward the rear side as shown in FIG. In, the light receiving surface (detection directivity) of the WB sensor 7 may be arranged so as to be directed substantially upward. In this case, substantially the same effects as in the above-described embodiment can be obtained.

[0062]

As described above, according to the present invention, in a small-sized image display device using a reflective type color liquid crystal display device, optimal color reproduction is always achieved regardless of the color temperature of an external light source (ambient light). And a color liquid crystal display device capable of realizing the miniaturization of the device.

Further, by efficiently arranging the constituent members, electric circuit members, and the like disposed inside the device, it is possible to provide a color liquid crystal display device capable of realizing further reduction in size and weight.

[Brief description of the drawings]

FIG. 1 is an external perspective view illustrating a schematic configuration of a color liquid crystal display device according to an embodiment of the present invention.

FIG. 2 is a rear view of the electronic imaging device to which the color liquid crystal display device of FIG. 1 is applied.

FIG. 3 is a block diagram showing the internal configuration of the electronic imaging apparatus shown in FIG. 2;

FIG. 4 is a diagram showing a relationship between output signals ([R / G] signal and [B / G] signal) from a WB sensor in the color liquid crystal display device of FIG.

FIG. 5 is a graph showing the relationship between W and W in the display unit of the color liquid crystal display device shown in FIG. 1;
The figure which shows the example of arrangement | positioning of B processing circuit and WB sensor.

FIG. 6 is a graph showing the relationship between W and W in the display unit of the color liquid crystal display device shown in FIG. 1;
The figure which shows the other example of arrangement | positioning of B processing circuit and WB sensor.

FIG. 7 is a graph showing the relationship between W and W in the display unit of the color liquid crystal display device shown in FIG. 1;
The figure which shows another example of arrangement | positioning of B processing circuit and WB sensor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Electronic imaging device 2 ... Color liquid crystal display device 2a ... Display surface 2b ... Back surface 3 ... LCD display part 4 ... Main body member 5 ... Connection means 6 ... LCD interface (WB processing circuit) 7 WB sensor 8 Operating means 8a White balance (WB) selection switch 8b Release switch 23 Look-up table (LUT)

Claims (5)

[Claims] 1. A color liquid crystal display device for displaying an electronic image signal as an image, comprising: a plurality of color components for detecting a color component of ambient light and forming an input image signal based on the detected color component information; A color liquid crystal display device comprising a white balance sensor for adjusting a color gain of a signal, wherein the white balance sensor is provided on a display surface side on a liquid crystal circuit board. 2. A color balance adjusting means for adjusting a color gain of a plurality of color component signals forming an image signal corresponding to an image to be displayed on a display screen based on a signal of the white balance sensor. 2. A color liquid crystal display device according to claim 1, wherein said color balance adjusting means is formed integrally with a display section for displaying an image. 3. The color liquid crystal display device according to claim 1, wherein the display unit comprises a reflective color liquid crystal display member capable of displaying an image using only reflected light. . 4. A storage unit in which a plurality of color gain adjustment values for adjusting a color gain of an image signal corresponding to an image displayed on the display unit are stored in advance, and a plurality of color gain adjustment values stored in the storage unit are stored. And a color gain adjustment value selection unit capable of selecting a predetermined adjustment value from the color gain adjustment value. The color gain adjustment value selection unit is stored in the storage unit according to the output of the white balance sensor. A predetermined color gain adjustment value can be selected from the plurality of adjustment values,
4. The image processing apparatus according to claim 2, wherein a desired color gain adjustment value can be arbitrarily selected from a plurality of adjustment values recorded in the storage unit in accordance with ambient light in a shooting environment. 3. A color liquid crystal display device according to item 1. 5. The white balance sensor according to claim 1, wherein the detection directivity and the viewing direction of the display unit substantially match each other. The color liquid crystal display device according to claim 4.