JP2000089733A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable displaying information holding a fixed color reproducing characteristic independently of a color component of external light in a liquid crystal display device of a reflection type active matrix. SOLUTION: An external light color component detecting means 600 is provided and detects color component of external light. When each color display signal constituting each pixel of a picture is inputted, red, green, blue display signal gradation control means 700, 800, 900 compensate gradation in accordance with a color component ratio of a color component detecting signal 601. A liquid crystal signal control device 200A rearranges a display signal being compensated in gradation in a matrix state, and gives a liquid crystal panel display signal to a data side driving means 400. A scan side driving means 300 generates a scan pulse based on a timing signal 101 for liquid crystal panel display, and gives it to each scanning electrode.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device for displaying information without being affected by a color component of external light, and more particularly to a liquid crystal display device having a reflection type active matrix structure.

[0002]

2. Description of the Related Art In recent years, liquid crystal display devices have been widely used as display displays, such as personal computers and monitors, because of their dramatic increase in display capacity, thinness, light weight, and low power consumption. Among them, a reflection type active matrix (AM) liquid crystal display device has a feature that it does not require a backlight as compared with a transmission type, and can be driven with lower power consumption.

A conventional reflection type active matrix liquid crystal display device will be described with reference to FIG. FIG. 5 is a configuration diagram of a reflection type active matrix liquid crystal display device using D / A conversion means as display signal gradation control means. In the figure, when a display timing signal 100, a plurality of bits of a red display signal 110, a green display signal 120, and a blue display signal 130 are given, a liquid crystal panel display timing signal 101, a red liquid crystal panel display A signal 111, a green liquid crystal panel display signal 121, and a blue liquid crystal panel display signal 131 are generated and output.

[0004] Reflective active matrix liquid crystal panel 5
Reference numeral 00 denotes an AM liquid crystal panel using a TN liquid crystal.
This is a liquid crystal panel in which a large number of scanning electrodes and a large number of data electrodes are formed in a matrix, and TFTs which are active elements are formed at intersections thereof. Scanning side driving means 300
Supplies a scan pulse to each scan electrode based on the timing signal 101 for liquid crystal display. The data-side driving unit 400 indicated by the broken line has a digital data signal control unit 410, a D / A conversion unit 420, and a data signal output unit 430, and the red liquid crystal panel display signal 11
1. A data pulse is generated based on the green liquid crystal panel display signal 121, the blue liquid crystal panel display signal 131, and the liquid crystal display timing signal 101, and the data pulse is applied to each data electrode of the reflection type active matrix liquid crystal panel 500. Is a circuit that gives

In such a configuration, the red display signal 1
10, when the green display signal 120 and the blue display signal 130 are input to the liquid crystal signal control means 200 together with the display timing signal 100, the liquid crystal signal control means 200
The blue display signals 110, 120, and 130 are rearranged into the pixel array of the reflection type active matrix liquid crystal panel 500, respectively, and a plurality of bits of red liquid crystal panel display data 111,
Output as green liquid crystal panel display data 121 and blue liquid crystal panel display data 131. Then, the liquid crystal signal control means 200 uses the display timing signal 100 to output a liquid crystal panel display timing signal 10 for instructing output timing to each pixel of the reflection type active matrix liquid crystal panel 500.
1 is created and output.

Liquid crystal panel display timing signal 101
Is input to the scanning side driving unit 300 and the data side driving unit 400. The red, green, and blue liquid crystal panel display data 111, 121, and 131 are transferred to the data driving unit 400 and input to the digital data signal control unit 410. Then, based on the liquid crystal panel display timing signal 101, the reflection type active matrix liquid crystal panel 500
Are arranged in the order of the horizontal pixel arrangement. The multi-bit liquid crystal panel display data of a plurality of bits output from the digital data signal control means 410 is input to the D / A conversion means 420 and converted from a digital signal to an analog signal.
Then, it is applied to the data electrode of the reflection type active matrix liquid crystal panel 500 via the data signal output means 430.

On the other hand, the scanning side driving means 300 generates a scanning pulse based on the liquid crystal panel display timing signal 101, performs voltage conversion, and applies a voltage to the scanning electrode of the reflection type active matrix liquid crystal panel 500.

[0008]

However, in the conventional liquid crystal display device having the above configuration, the color reproducibility of the reflective liquid crystal panel differs depending on the color components of the outdoor light and the illumination light. In addition, the color temperature varies depending on the daylight hours, even in the outdoors where outdoor light is received. Furthermore, under various types of illumination in a room, the center wavelength differs depending on the type of illumination light source.
In such an environment, when an image on a reflective liquid crystal panel is viewed using outdoor light or illumination light (hereinafter, both are referred to as external light), it can be said that the image is always displayed with constant color reproducibility. Did not.

The same red, green and blue liquid crystal panel display data 111, 121 and 131 are output from the liquid crystal signal control means 200 shown in FIG. Then, the signal is converted into an analog signal by the D / A converter 420. For this reason,
When the color balance of the external light is lost, the color reproducibility of the reflective active matrix liquid crystal panel 500 changes from the original image. Under such external light, there is a problem that the display image quality is significantly reduced.

In the conventional liquid crystal display device, the D / A conversion means as the gradation control means is included in the data driving means as shown in FIG. 5, but the D / A conversion means is not included in the data driving means. A similar problem arises when provided outside the driving means. A similar problem also occurs in a configuration in which an external display signal is an analog signal and has no gradation control unit.

The present invention has been made in view of such a conventional problem, and it is possible to always display information with constant color reproducibility under external light having any color components. It is an object of the present invention to realize a reflective active matrix liquid crystal display device that can be used.

[0012]

In order to achieve the above object, according to the first aspect of the present invention, a display signal of three colors composed of a plurality of bits is inputted as a gradation value of each pixel, and a liquid crystal is inputted. A liquid crystal display device for displaying information on a panel, comprising: an external light color component detecting means for detecting a color component of external light; and a liquid crystal display device for externally inputting a color display signal of each pixel based on its gradation value. A display signal gradation control means for converting a gradation value of the liquid crystal display signal based on a component ratio of each color outputted from the outside light color component detection means, A reflection type active matrix liquid crystal panel provided with an active element for driving a liquid crystal cell of each pixel, and a liquid crystal display signal output from the display signal gradation control means. A liquid crystal signal control means for generating a liquid crystal panel display data signal by rearranging the liquid crystal panel in the elementary arrangement, and generating a liquid crystal panel display timing signal for instructing an output timing to each pixel of the reflection type active matrix liquid crystal panel; Data-side driving means for applying a liquid crystal panel display data signal output from the signal control means to data electrodes of the reflection type active matrix liquid crystal panel; and scanning based on a liquid crystal panel display timing signal output from the liquid crystal signal control means. Scanning-side driving means for generating pulses and sequentially outputting the pulses to the scanning electrodes of the reflection-type active matrix liquid crystal panel.

According to a second aspect of the present invention, there is provided a liquid crystal display device for displaying information on a liquid crystal panel by inputting a display signal of three colors composed of a plurality of bits as a gradation value of each pixel. External light color component detecting means for detecting the color component of the pixel, and converting the red display signal of each pixel input from the outside into a liquid crystal display signal based on the gradation value, and outputting from the external light color component detecting means. A red display signal gradation control means for correcting a gradation value of the liquid crystal display signal based on a red component ratio in the detected color component detection signal; A green display signal for converting a gradation value of the liquid crystal display signal based on a green component ratio in a color component detection signal output from the external light color component detection means, while converting the liquid crystal display signal into a liquid crystal display signal based on the value. Tone control means and external While converting the blue display signal of each pixel input from the pixel into a liquid crystal display signal based on the gradation value, based on the blue component ratio in the color component detection signal output from the external light color component detection means, Blue display signal gradation control means for correcting the gradation value of the liquid crystal display signal,
A reflective active matrix liquid crystal panel provided at an intersection of a scanning electrode and a data electrode and having an active element for driving a liquid crystal cell of each pixel formed thereon; and a red liquid crystal display signal output from the red display signal gradation control means. Inputting a green liquid crystal display signal output from the green display signal gradation control means and a blue liquid crystal display signal output from the blue display signal gradation control means, respectively, to a pixel array of the reflection type active matrix liquid crystal panel. Liquid crystal signal control means for generating a liquid crystal panel display data signal by rearranging and generating a liquid crystal panel display timing signal for instructing output timing to each pixel of the reflection type active matrix liquid crystal panel; and the liquid crystal signal control means Of the liquid crystal panel display data signal output from the reflective type active matrix liquid crystal panel. Data-side driving means for applying data to the data electrodes, and a scanning pulse for generating a scanning pulse based on the liquid crystal panel display timing signal output from the liquid crystal signal control means and sequentially outputting the generated scanning pulses to the scanning electrodes of the reflection type active matrix liquid crystal panel. And a side driving means.

According to a third aspect of the present invention, there is provided a liquid crystal display device for displaying information on a liquid crystal panel by inputting a display signal of three colors composed of a plurality of bits as a gradation value of each pixel. An external light color component detecting means for detecting a color component of the liquid crystal panel, and a red display signal, a green display signal, and a blue display signal of each pixel input from the outside are rearranged into a pixel array of the liquid crystal panel, and a liquid crystal panel display data signal is displayed. And create
A liquid crystal signal control means for generating a liquid crystal panel display timing signal for instructing an output timing to each pixel of the liquid crystal panel; and a red liquid crystal panel display signal output from the liquid crystal signal control means based on the gradation value. A red display signal gradation for converting to a red liquid crystal display signal and correcting a gradation value of the red liquid crystal display signal based on a red component ratio in a color component detection signal output from the external light color component detection means. Control means for converting a green liquid crystal panel display signal output from the liquid crystal signal control means into a green liquid crystal display signal based on the gradation value, and a color component detection signal output from the external light color component detection means. A green display signal gradation control unit that corrects a gradation value of the green liquid crystal display signal based on a green component ratio in blue, and blue output from the liquid crystal signal control unit. The liquid crystal panel display signal is converted into a blue liquid crystal display signal based on the gradation value, and the blue liquid crystal display signal is converted based on the blue component ratio in the color component detection signal output from the external light color component detection means. A reflection type active matrix liquid crystal panel provided with an active element for driving a liquid crystal cell of each pixel, provided at an intersection of a scanning electrode and a data electrode; A red liquid crystal display signal output from the red display signal gradation control means, a green liquid crystal display signal output from the green display signal gradation control means, and a blue liquid crystal display signal output from the blue display signal gradation control means And a liquid crystal panel table output from the liquid crystal signal control means. The use timing signals to generate a scan pulse based and is characterized by comprising a scanning-side drive means for sequentially outputting the scanning electrodes of the reflection type active matrix liquid crystal panel.

According to a fourth aspect of the present invention, in the liquid crystal display device of the second aspect, the red display signal gradation control unit, the green display signal gradation control unit, and the blue display signal gradation control unit are each provided with the external light. Gradation correction means for correcting the gradation value of the liquid crystal display signal based on the component ratio of each color output from the color component detection means, and gradation correction data storage for holding gradation correction data used by the gradation correction means And means.

According to a fifth aspect of the present invention, in the liquid crystal display device of the third aspect, the red display signal gradation control means, the green display signal gradation control means, and the blue display signal gradation control means are each provided with the external light. Tone correction means for correcting a tone value of a liquid crystal panel display signal of each color output from the liquid crystal signal control means based on a component ratio of each color in a color component detection signal output from the color component detection means; And a gradation correction data storage unit that holds gradation correction data used by the gradation correction unit.

According to a sixth aspect of the present invention, in the liquid crystal display device according to the second aspect, the red display signal gradation control means, the green display signal gradation control means, and the blue display signal gradation control means include: The gradation value of each pixel in the green and blue display signals is converted into a liquid crystal display signal using a D / A converter, and the ratio of each color component in the color component detection signal output from the external light color component detector is calculated. The tone value of the liquid crystal display signal is corrected on the basis of this.

According to a seventh aspect of the present invention, in the liquid crystal display device according to the third aspect, the red display signal gradation control means, the green display signal gradation control means, and the blue display signal gradation control means include: The gradation value of each pixel in the liquid crystal panel display signal of each color output from the control means is converted into a liquid crystal display signal using a D / A conversion means, and the color component detection output from the external light color component detection means is detected. The tone value is corrected based on each color component ratio in the signal.

According to an eighth aspect of the present invention, in the liquid crystal display device of the third aspect, the red display signal gradation control means, the green display signal gradation control means, the blue display signal gradation control means,
And a signal electrode drive unit in which the data side drive means is integrated on the same substrate is incorporated in the reflection type active matrix liquid crystal panel.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, liquid crystal display devices according to embodiments of the present invention will be described with reference to the drawings. Embodiment 1 A reflective active matrix liquid crystal display device according to Embodiment 1 of the present invention will be described. FIG. 1 is a configuration diagram of the liquid crystal display device according to the first embodiment. Here, the same blocks as those of the liquid crystal display device shown in FIG. In the present embodiment, in addition to each block shown in FIG. 5, an external light color component detection unit 600, a red display signal gradation control unit 700, a green display signal gradation control unit 800, and a blue display signal gradation control unit 900 Are newly provided as display signal gradation control means.

The external light color component detecting means 600 is a detecting means for detecting a color component of the external light for each of red, green and blue, for example, for red, green and blue attached to the housing of the matrix liquid crystal panel. And outputs a color component detection signal 601 indicating the component ratio of each color. The color component detection signal 601 and the display timing signal 100 input from the outside are respectively connected to a red display signal gradation control unit 70.
0, green display signal gradation control means 800 and blue display signal gradation control means 900.

The red display signal gradation control means 700 has a red display signal gradation correction means 710 and a red gradation correction data storage means 720, and based on the red component ratio of the color component detection signal 601, the red display signal gradation control means 700 is provided. The tone correction data is read from the red tone correction data storage means 720, and the tone value of the red display signal 110 of each pixel input from the outside is corrected by the red display signal tone correction means 710, and the red liquid crystal display signal 1
12 is a control means for generating the “12”.

Similarly, green display signal gradation control means 800
Has a green display signal gradation correction unit 810 and a green gradation correction data storage unit 820, and stores the green gradation correction data based on the green component ratio of the color component detection signal 601. 820 is a control unit that corrects the gradation value of the green display signal 120 of each pixel input from the outside by the green display signal gradation correction unit 810 and generates the green liquid crystal display signal 122.

Further, the blue display signal gradation control means 900
It has a blue display signal gradation correction unit 910 and a blue gradation correction data storage unit 920, and based on the blue component ratio of the color component detection signal 601, stores the blue gradation correction data from the blue gradation correction data storage unit 920. This is a control unit that corrects the gradation value of the blue display signal 130 of each pixel input from the outside by the readout and blue display signal gradation correction unit 910, and generates the blue liquid crystal display signal 132. The gradation control for any of the color display signals is performed in synchronization with the display timing signal 100.

The liquid crystal signal control means 200A includes a red liquid crystal display signal 112 and a green liquid crystal display signal
2. Blue liquid crystal display signal 132 and display timing signal 1
00 is input and rearranged into the pixel arrangement of the reflective active matrix liquid crystal panel 500 to output a plurality of bits of red liquid crystal panel display data 111, green liquid crystal panel display data 121, and blue liquid crystal panel display data 131. . The liquid crystal signal control means 200A generates and outputs a liquid crystal panel display timing signal 101 based on the display timing signal 100. The liquid crystal panel display timing signal 101 is a signal for instructing output timing to each pixel of the reflection type active matrix liquid crystal panel 500.

Reflective active matrix liquid crystal panel 5
00, a large number of scan electrodes and a large number of data electrodes are formed in a matrix, and at the intersection of the scan electrodes and the data electrodes,
This is a liquid crystal panel on which active elements such as TFTs are formed. The scanning side driving unit 300 generates a scanning pulse based on the liquid crystal panel display timing signal 101, performs voltage conversion, and performs
A voltage is applied to the zero scanning electrode.

The data side driving means 400 has a digital data signal control means 410, a D / A conversion means 420, and a data signal output means 430. Digital data signal control means 410 receives a plurality of bits of red, green, and blue liquid crystal panel display data 111, 121, and 131,
Based on the liquid crystal panel display timing signal 101, the signals are arranged in the order of pixel arrangement in the horizontal direction of the reflective active matrix liquid crystal panel 500. The D / A converter 420 converts the multi-bit liquid crystal panel display data of each color output from the digital data signal controller 410 into an analog signal. The data signal output means 430 converts an analog pixel signal into a drive waveform to be applied to the data electrodes of the reflection type active matrix liquid crystal panel 500, and applies the drive waveform to each data electrode.

The operation of the liquid crystal display device of the reflection type active matrix configured as described above will be described. The red display signal 110 is input to the red display signal gradation control means 700 together with the display timing signal 100. Also,
The green display signal 120 is input to the green display signal gradation control unit 800 together with the display timing signal 100. Further, the blue display signal 130 is the display timing signal 100
Is input to the blue display signal gradation control means 900.

If the reflection type active matrix liquid crystal display device is used indoors, room illumination light is incident on the photoelectric conversion element of the external light color component detection means 600. When the light source of the indoor lighting is a fluorescent lamp, there is little red component. Therefore, the level of the red component in the color component detection signal 601 of the external light color component detection means 600 is lower than that of the green component and the blue component. In addition, when a reflective active matrix liquid crystal display device is used outdoors during the daytime or under natural light emitted from a window, the color balance is often maintained, and the color component detection signal is used. , The respective levels of the red component, the green component, and the blue component become substantially equal.

The gradation correction by the red display signal gradation control means 700, the green display signal gradation control means 800, and the blue display signal gradation control means 900 is not fixed for the red, green, and blue display signals, Based on the color components detected by the component detection means 600, the processing is individually performed on the red, green, and blue display signals. For example, when there is a large amount of red component in the external light, the gray level correction data that has lower luminance than the green display signal 120 and the blue display signal 130 with respect to the red display signal 110 is stored in the red gray level correction data storage unit 720. Read out,
The correction is performed by the red display signal gradation correction unit 710. In this way, the display signal of each color is controlled by the gradation correction means and the gradation correction data storage means so that the display signal of the same color as the main component of the external light has low luminance.

The red liquid crystal display signal 112 converted by the red display signal gradation control means 700, the green liquid crystal display signal 122 converted by the green display signal gradation control means 800, and converted by the blue display signal gradation control means 900 When the blue liquid crystal display signal 132 and the display timing signal 100 are input to the liquid crystal signal control means 200A, they are rearranged into the pixel array of the reflective active matrix liquid crystal panel 500.
Then, the multi-bit red liquid crystal panel display data 11
1, transferred to the data side driving means 400 as green liquid crystal panel display data 121 and blue liquid crystal panel display data 131. Further, the display timing signal 100 is converted by the liquid crystal signal control means 200A into a liquid crystal panel display timing signal 101 for instructing output timing to each pixel of the reflection type active matrix liquid crystal panel 500,
The data is transferred to the scanning driver 300 and the data driver 400.

The scanning side driving means 300 generates a scanning pulse based on the liquid crystal panel display timing signal 101,
Voltage conversion is performed to apply a voltage to the scanning electrodes of the reflective active matrix liquid crystal panel 500. In the data-side driving unit 400, when the multi-bit red, green, and blue liquid crystal panel display data 111, 121, and 131 and the liquid crystal panel display timing signal 101 are input to the digital data signal control unit 410, Based on the panel display timing signal 101, they are arranged in the horizontal pixel array order of the reflective active matrix liquid crystal panel 500. The multi-bit liquid crystal panel display data of a plurality of bits output from the digital data signal control means 410 is input to the D / A conversion means 420 and converted from a digital signal to an analog signal. Then, it is applied to the data electrode of the reflection type active matrix liquid crystal panel 500 via the data signal output means 430. The molecular orientation of the liquid crystal is controlled by the effective value of the applied voltage from the scanning side and the data side, and by changing the reflectance of each pixel, information such as the same color image and characters as the information source is displayed.

When information is displayed using the above-described reflective active matrix liquid crystal display device, information is always displayed with constant color reproducibility under external light having any color components. be able to. Therefore, a high-quality liquid crystal display device can be realized without being affected by the color component of external light.

In the liquid crystal display device of the present embodiment, each color display signal gradation control means is provided before the liquid crystal signal control means 200A. However, the same effect can be obtained by providing the control means after the liquid crystal signal control means 200A.

(Embodiment 2) Next, a reflective active matrix liquid crystal display device according to Embodiment 2 of the present invention will be described. FIG. 2 is a configuration diagram of a reflective active matrix liquid crystal display device according to the second embodiment. Here, the same blocks as those in FIG. 1 and FIG. Outside light color component detection means 6
Reference numeral 00 denotes a detection unit that detects a color component of external light, as in the first embodiment. The reflection type active matrix liquid crystal panel 500 of the present embodiment is driven by analog data side driving means 401, unlike the one shown in FIG.

The analog data side driving means 401 has an analog data signal control means 411 and a data signal output means 430, and is controlled by an analog liquid crystal panel display signal. Therefore, the red display signal D / A conversion means 7 is used as analog color display signal gradation control means.
30A, the green display signal D / A converter 830A, and the blue display signal D / A converter 930A
It is provided before 00B.

The red display signal D / A conversion means 730A is
The multi-bit red display signal 110 input from the outside is subjected to D / A conversion based on the gradation value, and the gradation of the red liquid crystal display signal is converted to D based on the red component ratio of the color component detection signal 601. It is a control means for correcting at the time of / A conversion and generating a red liquid crystal display signal 731A. Similarly, the green display signal D / A conversion means 830A converts the multi-bit green display signal 120 input from the outside into a digital signal based on the gradation value.
The control unit performs the A / A conversion and corrects the gradation of the green liquid crystal display signal at the time of the D / A conversion based on the green component ratio of the color component detection signal 601 to generate the green liquid crystal display signal 831A. Further, blue display signal D / A conversion means 930A
Is a multi-bit blue display signal 13 input from the outside.
0 is D / A-converted based on the gradation value thereof, and the gradation of the blue liquid crystal display signal is corrected at the time of D / A conversion based on the blue component ratio of the color component detection signal 601, and the blue liquid crystal display signal is corrected. This is control means for generating 931A. The gradation control for any color display signal is performed by the display timing signal 100.
It is performed in synchronization with. The red display signal D / A converter 730A, the green display signal D / A converter 830A, and the blue display signal D / A converter 930A convert the color display signal of each pixel input from the outside into its gradation value. Based on the component ratio of each color output from the external light color component detection means, and has the function of display signal gradation control means for correcting the gradation value of the liquid crystal display signal. .

The liquid crystal signal control means 200B includes a D / A converted red liquid crystal display signal 731A and a green liquid crystal display signal 8
31A, the blue liquid crystal display signal 931A and the display timing signal 100 are input, rearranged into the pixel array of the reflection type active matrix liquid crystal panel 500, D / A converted, red liquid crystal panel display data 732, and D / A converted It outputs green liquid crystal panel display data 832 and blue / liquid crystal panel display data 932 after D / A conversion. Also, the liquid crystal signal control means 200B
Is input, a liquid crystal panel display timing signal 101 for instructing output timing to each pixel of the reflection type active matrix liquid crystal panel 500 is generated and output.

Reflective active matrix liquid crystal panel 5
Reference numeral 00 denotes a liquid crystal panel in which a large number of scanning electrodes and a large number of data electrodes are formed in a matrix, and TFTs are formed as active elements at intersections of the scanning electrodes and the data electrodes. The scanning-side driving unit 300 generates a scanning pulse based on the liquid crystal panel display timing signal 101, performs voltage conversion, and performs
A voltage is applied to the scanning electrode No. 00. The analog data signal control means 411 in the data side driving means 401 receives the D / A converted red, green, and blue liquid crystal panel display data 732, 832, and 932 and the liquid crystal panel display timing signal 101. Based on the liquid crystal panel display timing signal 101, the reflective active matrix liquid crystal panel 500 is arranged in the horizontal pixel arrangement order. The data signal output means 430 converts the display data of each color liquid crystal panel output from the analog data signal control means 411 into a drive waveform to be applied to the data electrodes of the reflection type active matrix liquid crystal panel 500, and gives the drive waveforms to the respective data electrodes. It is.

The operation of the liquid crystal display device configured as described above will be described. The red display signal 110 is generated by the red display signal D / A converter 7 together with the display timing signal 100.
30A. The green display signal 120 is input to the green display signal D / A converter 830A together with the display timing signal 100. Further, the blue display signal 130
Is the blue display signal D / along with the display timing signal 100.
It is input to A conversion means 930A. If the reflection type active matrix liquid crystal display device is used indoors, the room illumination light is incident on the photoelectric conversion element of the external light color component detection means 600. When the light source of the indoor lighting is a fluorescent lamp, there is little red component. Therefore, the level of the red component in the color component detection signal 601 of the external light color component detection unit 600 is lower than the levels of the green component and the blue component. In addition, when a reflective active matrix liquid crystal display device is used outdoors during the daytime or under natural light emitted from a window, the color balance is often maintained, and the color component detection signal is used. , The respective levels of the red component, the green component, and the blue component become substantially equal.

The red display signal D / A converter 730A, the green display signal D / A converter 830A, the blue display signal D / A
The gradation correction by the A conversion unit 930A is not fixed for the red, green, and blue display signals, but is performed individually for the red, green, and blue display signals based on the color components detected by the external light color component detection unit 600. To do. For example, when the outside light has a large red component, the green display signal 12
The gradation correction is performed at the time of the D / A conversion so that the luminance becomes lower than the 0 and blue display signals 130. As described above, the display signal of the same color as the color that is the main component of the external light is controlled by the respective color display signal D / A conversion means so as to have low luminance.

The red display signal 731A converted by the red display signal D / A conversion means 730A and the green display signal D / A
The green liquid crystal display signal 83 converted by the A conversion means 830A
1A, the blue liquid crystal display signal 931A converted by the blue display signal D / A conversion means 930A, and the display timing signal 1
00 is input to the liquid crystal signal control means 200B, and is rearranged into the pixel array of the reflection type active matrix liquid crystal panel 500. D / A-converted red liquid crystal panel display data 732 output from liquid crystal signal control means 200B, D / A
The A-converted green liquid crystal panel display data 832 and the D / A-converted blue liquid crystal panel display data 932 are transferred to the data side driving unit 401. The display timing signal 10
0 is a liquid crystal panel display timing signal 10 for instructing output timing to each pixel of the reflection type active matrix liquid crystal panel 500 by the liquid crystal signal control means 200B.
The data is converted to 1 and transferred to the scanning side driving unit 300 and the data side driving unit 401.

The scanning-side driving means 300 generates a scanning pulse based on the liquid crystal panel display timing signal 101, performs voltage conversion, and applies a voltage to the scanning electrode of the reflection type active matrix liquid crystal panel 500. Further, the analog data signal control means 411 outputs the red after D / A conversion,
Green and blue liquid crystal panel display data 732, 832, 932
When the liquid crystal panel display timing signal 101 is input, the reflective active matrix liquid crystal panel 500 is arranged in the horizontal pixel arrangement order based on the liquid crystal panel display timing signal 101. The liquid crystal panel display data of each color output from the analog data signal control means 411 is applied to the data electrodes of the reflection type active matrix liquid crystal panel 500 via the data signal output means 430. The molecular orientation of the liquid crystal is controlled by the effective value of the applied voltage from the scanning side and the data side, and the same color image and information as characters as the information source are displayed by changing the reflectance of each pixel.

When information is displayed using the above-mentioned reflection type active matrix liquid crystal display device, information is always displayed with constant color reproducibility under external light having any color components. be able to. Therefore, a high-quality liquid crystal display device can be realized without being affected by the color component of external light. In the liquid crystal display device of the present embodiment, the D / A conversion means for each color display signal is provided before the liquid crystal signal control means 200B.

(Embodiment 3) Next, a reflective active matrix liquid crystal display device according to Embodiment 3 of the present invention will be described. FIG. 3 is a configuration diagram of the liquid crystal display device according to the third embodiment. Here, the same blocks as those in FIG. 1, FIG. 2, and FIG. The reflective active matrix liquid crystal panel 500 of this embodiment is different from those of the first and second embodiments in that it is driven by a data-side driving unit 402 having a built-in color display signal gradation control unit. That is, the present invention is characterized in that each color display signal gradation control means of the first embodiment and the data side driving means are integrated.

The external light color component detecting means 600 is a detecting means for detecting a color component of external light, as in the first and second embodiments. The color component detection signal 601 output from the external light color component detection means 600 is applied to the red display signal gradation control means 700, the green display signal gradation control means 800, and the blue display signal gradation control in the data side driving means 402, respectively. A means 900 is provided.

The liquid crystal signal control means 200C includes a red display signal 110, a green display signal 120, and a blue display signal 130.
When the display timing signal 100 is input, each color display signal is transmitted to the reflection type active matrix liquid crystal panel 50.
The pixel array is rearranged to 0. The liquid crystal signal control means 200C outputs a plurality of bits of red liquid crystal panel display data 111, green liquid crystal panel display data 121, and blue liquid crystal panel display data 131, and, based on the display timing signal 100, the reflection type active matrix liquid crystal panel 500. A timing signal 101 for liquid crystal panel display for instructing output timing to each pixel is created and output.

The red display signal gradation control means 700 reads out the red gradation correction data from the red gradation correction data storage means 720 based on the red component ratio of the color component detection signal 601, and executes the red display signal gradation correction. Control means for correcting the gradation value of the red liquid crystal display signal 111 by the means 710 and generating the red liquid crystal display signal 112. Similarly, the green display signal gradation control means 800 outputs the color component detection signal 601.
The green gradation correction data is read out from the green gradation correction data storage means 820 based on the green component ratio of the green liquid crystal panel, and the gradation value of the green liquid crystal panel display signal 121 is corrected by the green display signal gradation correction means 810, This is control means for generating a green liquid crystal display signal 122. Further, the blue display signal gradation control unit 900 reads out the blue gradation correction data from the blue gradation correction data storage unit 920 based on the blue component ratio of the color component detection signal 601, and
The control means 10 corrects the gradation value of the blue liquid crystal display signal 131 and generates a blue liquid crystal display signal 132. The gradation control for any of the color display signals is performed in synchronization with the liquid crystal panel display timing signal 101.

Reflective active matrix liquid crystal panel 5
Reference numeral 00 denotes a liquid crystal panel in which a large number of scanning electrodes and a large number of data electrodes are formed in a matrix, and a TFT as an active element is formed at an intersection of the scanning electrode and the data electrode. The scanning-side driving unit 300 generates a scanning pulse based on the liquid crystal panel display timing signal 101, performs voltage conversion, and applies a voltage to the scanning electrode of the reflective active matrix liquid crystal panel 500. Also,
The digital data signal control means 410 in the data side driving means 402 receives the liquid crystal panel display data 112, 122, 132 of plural bits and the timing signal 101 for liquid crystal panel display, and Based on the use timing signal 101, the reflective active matrix liquid crystal panel 500 is arranged in the order of pixel arrangement in the horizontal direction. The D / A converter 420 converts a digital signal into an analog signal when a plurality of bits of liquid crystal display data of each color is input from the digital data signal controller 410. The data signal output means 430 converts the output signal of the D / A conversion means 420 into a drive waveform applied to the data electrodes of the reflection type active matrix liquid crystal panel 500, and outputs the drive waveform to each data electrode.

In this embodiment, the red display signal gradation control means 700 and the green display signal gradation control means 8 indicated by the broken lines
00, the blue display signal gradation control means 900, the digital data signal control means 410, the D / A conversion means 420, and the data signal output means 430 are integrated as a hybrid IC, monolithic IC, or FPC board, and the data side driving means 402 And

The operation of the liquid crystal display device of the reflection type active matrix configured as described above will be described. The red display signal 110, the green display signal 120, and the blue display signal 130 composed of a plurality of bits are input to the liquid crystal signal control unit 200C together with the display timing signal 100.
The liquid crystal signal control means 200C rearranges the red display signal 110, the green display signal 120, and the blue display signal 130 into the pixel arrangement of the reflective active matrix liquid crystal panel 500, and displays the multi-bit red liquid crystal panel display data 111, the green liquid crystal panel Display data 121 and blue liquid crystal panel display data 131 are generated. Then, based on the display timing signal 100, the reflection type active matrix liquid crystal panel 5
A liquid crystal panel display timing signal 101 for instructing an output timing to each pixel of 00 is generated.

The external light color component detecting means 600 detects the color component of the external light in the environment where the liquid crystal display device is used, and the red display signal gradation control means 7 in the data side driving means 402.
00, the color component detection signal 601 is given to the green display signal gradation control means 800 and the blue display signal gradation control means 900, respectively.

The gradation correction by the red display signal gradation control means 700, the green display signal gradation control means 800, and the blue display signal gradation control means 900 is not fixed for the red, green, and blue display signals, Based on the color components detected by the component detection means 600, the processing is individually performed on the red, green, and blue display signals. For example, when there is a large amount of red component in the external light, the gray level correction data that has lower luminance than the green display signal 120 and the blue display signal 130 with respect to the red display signal 110 is stored in the red gray level correction data storage unit 720. Read out,
The correction is performed by the red display signal gradation correction unit 710. As described above, the display signal of the same color as the color that is the main component of the external light is controlled by the tone correction means for each color and the tone correction data storage means so as to have low luminance.

The red liquid crystal display signal 112 converted by the red display signal gradation control means 700, the green liquid crystal display signal 122 converted by the green display signal gradation control means 800, and the blue liquid crystal display signal converted by the blue display signal gradation control means 900. The blue liquid crystal display signal 132 is input to the digital data signal control means 410, and based on the liquid crystal panel display timing signal 101, is arranged in the horizontal pixel arrangement order of the reflection type active matrix liquid crystal panel 500. The multi-bit liquid crystal panel display data of a plurality of bits output from the digital data signal control means 410 is input to the D / A conversion means 420 and converted from a digital signal to an analog signal. Then, it is applied to the data electrode of the reflection type active matrix liquid crystal panel 500 via the data signal output means 430.

The scanning side driving means 300 generates a scanning pulse based on the liquid crystal panel display timing signal 101, performs voltage conversion, and applies a voltage to the scanning electrode of the reflection type active matrix liquid crystal panel 500. The molecular orientation of the liquid crystal is controlled by the effective value of the applied voltage from the scanning side and the data side, and by changing the reflectance of each pixel,
Information such as the same color image and characters as the information source is displayed.

When information is displayed using the reflective active matrix liquid crystal display device described above, information is always displayed with constant color reproducibility under external light having any color components. be able to. Therefore, a high-quality liquid crystal display device can be realized without being affected by the color component of external light. In addition, by incorporating each color display signal gradation control means into the data-side driving means, it is possible to reduce the size, thickness, weight, and cost of the liquid crystal display device.

(Embodiment 4) Next, a reflective active matrix liquid crystal display device according to Embodiment 4 of the present invention will be described. FIG. 4 is a configuration diagram of the liquid crystal display device according to the fourth embodiment. Here, FIG. 1, FIG. 2, FIG.
The same blocks as those in FIG. 5 are described with the same reference numerals. The reflection type active matrix liquid crystal panel 500 of the present embodiment is driven by the data-side driving unit 403 having each color display signal D / A conversion unit. That is, this liquid crystal display device has the respective color display signals D / A of the second embodiment.
The conversion means and the data-side driving means are integrated. For this reason, the liquid crystal signal control means 20
The color display signal D / A conversion means is provided at the subsequent stage of 0D.

The external light color component detecting means 600 is a detecting means for detecting a color component of external light, as in the first, second and third embodiments. The color component detection signal 601 output from the external light color component detection unit 600 is provided to a red display signal D / A conversion unit 730B, a green display signal D / A conversion unit 830B, and a blue display signal D / A conversion unit 930B, respectively. Can be

The liquid crystal signal control means 200D includes a red display signal 110, a green display signal 120, and a blue display signal 130.
And the display timing signal 100 are input and rearranged to the pixel array of the reflection type active matrix liquid crystal panel 500. The liquid crystal signal control means 200D includes a plurality of bits of red liquid crystal panel display data 111, green liquid crystal panel display data 121, and blue liquid crystal panel display data 1
At the same time, a liquid crystal panel display timing signal 101 for instructing an output timing to each pixel of the reflection type active matrix liquid crystal panel 500 is generated and output from the display timing signal 100.

The red display signal D / A conversion means 730B
The D / A conversion is performed on the red liquid crystal panel display signal 111 based on the gradation value, and the gradation of the red liquid crystal display signal is corrected at the time of D / A conversion based on the red component ratio of the color component detection signal 601. , A control unit for generating a red liquid crystal display signal 731B. Green display signal D / A conversion means 830
B performs D / A conversion of the green liquid crystal panel display signal 121 based on the gradation value thereof, and converts the gradation of the green liquid crystal display signal to D based on the green component ratio of the color component detection signal 601.
It is a control means for correcting at the time of / A conversion and generating a green liquid crystal display signal 831B. Further, the blue display signal D / A conversion means 930B performs D / A conversion of the blue liquid crystal panel display signal 131 based on the gradation value thereof, and displays the blue liquid crystal display signal 131 based on the blue component ratio of the color component detection signal 601. The tone of the signal is corrected at the time of D / A conversion, and the blue liquid crystal display signal 931 is corrected.
This is control means for generating B.

Reflective active matrix liquid crystal panel 5
Reference numeral 00 denotes a liquid crystal panel in which a large number of scanning electrodes and a large number of data electrodes are formed in a matrix, and a TFT as an active element is formed at an intersection of the scanning electrode and the data electrode. The scanning-side driving unit 300 generates a scanning pulse based on the liquid crystal panel display timing signal 101, performs voltage conversion, and applies a voltage to the scanning electrode of the reflective active matrix liquid crystal panel 500. Also,
The analog data signal control means 411 in the data side driving means 403 receives the red / green / blue liquid crystal display data 731B, 831B, 931B after the D / A conversion and the timing signal 101 for liquid crystal panel display. On the basis of the liquid crystal panel display timing signal 101, the reflective active matrix liquid crystal panel 500 is arranged in the horizontal pixel arrangement order. Data signal output means 430
Converts the liquid crystal display data of each color outputted from the analog data signal control means 411 into a drive waveform applied to the data electrodes of the reflection type active matrix liquid crystal panel 500, and gives the drive waveforms to the respective data electrodes.

In this embodiment, the red display signal D / A conversion means 730B, the green display D / A conversion control means 830B, and the blue display signal D / A conversion means 930B shown in the broken lines
The analog data signal control means 411 and the data signal output means 430 are integrated as a hybrid IC, a monolithic IC, or an FPC board. These circuit groups are referred to as data-side driving means 403.

The operation of the liquid crystal display device of the reflection type active matrix configured as described above will be described. The red display signal 110, the green display signal 120, and the blue display signal 130 are input to the liquid crystal signal control unit 200D together with the display timing signal 100. Liquid crystal signal control means 200
D rearranges the red display signal 110, the green display signal 120, and the blue display signal 130 into the pixel array of the reflective active matrix liquid crystal panel 500. The liquid crystal signal control means 200D generates a plurality of bits of red liquid crystal panel display data 111, green liquid crystal panel display data 121, and blue liquid crystal panel display data 131, and, based on the display timing signal 100, controls the reflection type active matrix liquid crystal panel 500. A liquid crystal panel display timing signal 101 for instructing output timing to each pixel is generated.

The external light color component detecting means 600 detects a color component of external light in an environment where the liquid crystal display device is used, and outputs a red display signal D / A converting means 730 B in the data side driving means 403 and a green color. The display signal D / A conversion means 830B and the blue display signal D / A conversion means 930B provide the color component detection signal 60
Give one.

The red display signal D / A conversion means 730B, the green display signal D / A conversion means 830B, the blue display signal D / A
The gradation correction by the A conversion unit 930B is not fixed for the red, green, and blue display signals, but is performed individually for the red, green, and blue display signals based on the color components detected by the external light color component detection unit 600. To do. For example, when there are many red components in the external light, the green liquid crystal panel display signal 121 and the blue liquid crystal panel display signal 1
The gradation correction so that the luminance becomes lower than 31 is performed by the red display signal D / A converter 730B. As described above, the display signal of the same color as the color that is the main component of the external light is controlled by the respective color display signal D / A conversion means so as to have low luminance.

The red liquid crystal display signal 731B converted by the red display signal D / A conversion means 730B and the green display signal D / A
Green liquid crystal display signal 83 converted by A conversion means 830B
1B, the blue liquid crystal display signal 931B converted by the blue display signal D / A conversion means 930B is input to the analog data signal control means 411, and based on the liquid crystal panel display timing signal 101, the reflection type active matrix liquid crystal panel 500 The pixels are arranged in the order of the horizontal pixel arrangement. The liquid crystal display data of each color output from the analog data signal control means 411 is applied to the data electrodes of the reflection type active matrix liquid crystal panel 500 via the data signal output means 430.

The scanning side driving means 300 generates a scanning pulse based on the liquid crystal panel display timing signal 101, performs voltage conversion, and applies a voltage to the scanning electrode of the reflection type active matrix liquid crystal panel 500. The molecular orientation of the liquid crystal is controlled by the effective value of the voltage applied from the scanning side and the data side, and by changing the reflectance of each pixel, information such as a color image and characters same as the information source is displayed.

When information is displayed using the above-mentioned reflective active matrix liquid crystal display device, information is always displayed with constant color reproducibility under external light having any color components. be able to. Therefore, a high-quality liquid crystal display device can be realized without being affected by the color component of external light. In addition, by incorporating each color display signal D / A conversion unit into the data side driving unit, it is possible to reduce the size, thickness, weight, and cost of the liquid crystal display device.

[0069]

According to the first, second and third aspects of the present invention,
It is possible to always display information with constant color reproducibility under external light having any color component. For this reason, a high quality reflective active matrix liquid crystal display device can be realized.

According to the fourth and fifth aspects of the present invention, gradation correction for external light can be easily performed by using the conventional data-side driving means, and the color component of external light having In this case, it is possible to always display information with constant color reproducibility. For this reason, a high quality reflective active matrix liquid crystal display device can be realized.

According to the sixth and seventh aspects of the present invention, it is possible to easily perform gradation control of a display signal and gradation correction for external light by using the conventional data driving means. Even under external light having components, it is possible to always display information with constant color reproducibility. For this reason, a high quality reflective active matrix liquid crystal display device can be realized.

According to the eighth aspect of the invention, since the display signal gradation control means for each color is integrated with the data side driving means, the liquid crystal display device can be reduced in size, thickness, weight and cost. It is possible to control the gradation of display signals and perform gradation correction for external light, so that constant color reproducibility is always maintained under external light having any color components. Information can be displayed. For this reason, a high quality reflective active matrix liquid crystal display device can be realized.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a reflective active matrix liquid crystal display device according to Embodiment 1 of the present invention.

FIG. 2 is a configuration diagram of a reflective active matrix liquid crystal display device according to a second embodiment of the present invention.

FIG. 3 is a configuration diagram of a reflective active matrix liquid crystal display device according to a third embodiment of the present invention.

FIG. 4 is a configuration diagram of a reflective active matrix liquid crystal display device according to a fourth embodiment of the present invention.

FIG. 5 is a configuration diagram of a conventional reflective active matrix liquid crystal display device.

[Explanation of symbols]

REFERENCE SIGNS LIST 100 Display timing signal 101 Liquid crystal panel display timing signal 110 Red display signal 111 Red liquid crystal panel display signal 112 Red liquid crystal display signal 120 Green display signal 121 Green liquid crystal panel display signal 122 Green liquid crystal display signal 130 Blue display signal 131 Blue liquid crystal panel display Signal 132 Blue liquid crystal display signal 200A, 200B, 200C, 200D Liquid crystal signal control means 300 Scanning drive means 400 Data side drive means 401 Data side drive means for analog 402 Data side drive means 403 with built-in gradation control means for each color display signal Data-side driving means built in each color display signal D / A conversion means 410 Digital data signal control means 420 D / A conversion means 430 Data signal output means 500 Reflective active matrix liquid crystal panel 600 External light color component detection Means 601 Color component detection signal 700 Red display signal gradation control means 710 Red display signal gradation correction means 720 Red gradation correction data storage means 730A, 730B Red display signal D / A conversion means 731A, 731B Red after D / A conversion Liquid crystal display signal 732 D / A converted red liquid crystal panel display signal 800 Green display signal gradation control means 810 Green display signal gradation correction means 820 Green gradation correction data storage means 830A, 830B Green display signal D / A conversion means 831A , 831B Green liquid crystal display signal after D / A conversion 832 Green liquid crystal panel display signal after D / A conversion 900 Blue display signal gradation control means 910 Blue display signal gradation correction means 920 Blue gradation correction data storage means 930A, 930B Blue Display signal D / A conversion means 931A, 931B Blue liquid crystal after D / A conversion示信 No. 932 D / A-converted blue liquid crystal panel display signal

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 2H093 NC14 NC22 NC23 NC24 NC26 NC34 NC50 NC55 NC59 NC90 ND02 ND17 ND24 ND58 NE10 5C006 AA16 AA22 AF46 AF63 AF71 AF83 AF85 BB16 BB28 BC03 BC13 BC16 FA18 FA21 FA41 FA51 FA56

Claims (8)

[Claims] 1. A liquid crystal display device for displaying information on a liquid crystal panel by inputting a display signal of three colors composed of a plurality of bits as a gradation value of each pixel, and detecting an external light color component. A light color component detection unit, which converts a color display signal of each pixel input from the outside into a liquid crystal display signal based on the gradation value thereof, and converts the color display signal based on the component ratio of each color output from the outside light color component detection unit. A reflection signal active means provided at an intersection of a scanning electrode and a data electrode, wherein an active element for driving a liquid crystal cell of each pixel is formed. A matrix liquid crystal panel, and a liquid crystal display signal output from the display signal gradation control means is rearranged into a pixel array of the reflective active matrix liquid crystal panel to create a liquid crystal panel display data signal. A liquid crystal signal control means for generating a liquid crystal panel display timing signal for instructing an output timing to each pixel of the reflection type active matrix liquid crystal panel; and a liquid crystal panel display data signal output from the liquid crystal signal control means for the reflection type active matrix liquid crystal panel display data signal. A data-side driving means for applying to a data electrode of a matrix liquid crystal panel; and a scanning pulse based on a liquid crystal panel display timing signal output from the liquid crystal signal control means. A liquid crystal display device comprising: a scanning side driving unit for outputting. 2. A liquid crystal display device for inputting a display signal of three colors composed of a plurality of bits as a gradation value of each pixel and displaying information on a liquid crystal panel, wherein the external device detects a color component of external light. A light color component detection unit, and converts a red display signal of each pixel input from the outside into a liquid crystal display signal based on the gradation value, and outputs a color component detection signal output from the outside light color component detection unit. A red display signal gradation control means for correcting a gradation value of the liquid crystal display signal based on a red component ratio; and a liquid crystal display signal based on the gradation value of a green display signal of each pixel inputted from outside. And a green display signal gradation control means for correcting the gradation value of the liquid crystal display signal based on a green component ratio in the color component detection signal output from the external light color component detection means, Each pixel input from The blue display signal is converted into a liquid crystal display signal based on the gradation value thereof, and the gradation of the liquid crystal display signal is calculated based on the blue component ratio in the color component detection signal output from the external light color component detection means. A blue display signal gradation control unit for correcting a value, a reflective active matrix liquid crystal panel provided at an intersection of a scanning electrode and a data electrode, and having an active element for driving a liquid crystal cell of each pixel, The red liquid crystal display signal output from the signal gradation control means, the green liquid crystal display signal output from the green display signal gradation control means, and the blue liquid crystal display signal output from the blue display signal gradation control means are respectively input. A liquid crystal panel display data signal is created by rearranging the pixel array of the reflection type active matrix liquid crystal panel, and the reflection type active matrix A liquid crystal signal control means for generating a liquid crystal panel display timing signal for instructing an output timing to each pixel of the liquid crystal panel; and a liquid crystal panel display data signal output from the liquid crystal signal control means for the reflection type active matrix liquid crystal panel. Data-side driving means for providing data electrodes; and a scanning side for generating a scanning pulse based on a liquid crystal panel display timing signal output from the liquid crystal signal control means and sequentially outputting the generated scanning pulses to the scanning electrodes of the reflective active matrix liquid crystal panel. A liquid crystal display device comprising: driving means. 3. A liquid crystal display device for inputting a display signal of three colors composed of a plurality of bits as a gradation value of each pixel and displaying information on a liquid crystal panel, wherein the external device detects a color component of external light. A light color component detection unit, and a liquid crystal panel display data signal generated by rearranging a red display signal, a green display signal, and a blue display signal of each pixel input from the outside into a pixel array of the liquid crystal panel,
A liquid crystal signal control unit for generating a liquid crystal panel display timing signal for instructing an output timing to each pixel of the liquid crystal panel; and a red liquid crystal panel display signal output from the liquid crystal signal control unit based on the gradation value. A red display signal gradation for converting to a red liquid crystal display signal and correcting a gradation value of the red liquid crystal display signal based on a red component ratio in a color component detection signal output from the external light color component detection means. Control means for converting a green liquid crystal panel display signal output from the liquid crystal signal control means into a green liquid crystal display signal based on the gradation value, and a color component detection signal output from the external light color component detection means A green display signal gradation control unit that corrects a gradation value of the green liquid crystal display signal based on a green component ratio of the green liquid crystal display signal output from the liquid crystal signal control unit. The color liquid crystal panel display signal is converted into a blue liquid crystal display signal based on the gradation value, and based on the blue component ratio in the color component detection signal output from the external light color component detection means, the blue liquid crystal display signal is displayed. A reflection type active matrix liquid crystal panel provided with a blue display signal gradation control means for correcting a gradation value of a signal, an active element provided at an intersection of a scanning electrode and a data electrode and driving a liquid crystal cell of each pixel; A red liquid crystal display signal outputted from the red display signal gradation control means, a green liquid crystal display signal outputted from the green display signal gradation control means, and a blue liquid crystal display outputted from the blue display signal gradation control means. Data-side driving means for providing signals to data electrodes of the reflection-type active matrix liquid crystal panel, and a liquid crystal panel output from the liquid crystal signal control means. The liquid crystal display device characterized by comprising generating a scan pulse based on the timing signal for display, a scanning-side drive means for sequentially outputting the scanning electrodes of the reflection type active matrix liquid crystal panel. 4. The liquid crystal display device according to claim 1, wherein the red display signal gradation control unit, the green display signal gradation control unit, and the blue display signal gradation control unit are configured to control the liquid crystal based on a component ratio of each color output from the external light color component detection unit. 3. The liquid crystal device according to claim 2, further comprising: a gradation correction unit that corrects a gradation value of a display signal; and a gradation correction data storage unit that holds gradation correction data used by the gradation correction unit. Display device. 5. The red display signal gradation control means, the green display signal gradation control means, and the blue display signal gradation control means, wherein each color component in a color component detection signal output from the external light color component detection means is provided. Gradation correction means for correcting the gradation value of the liquid crystal panel display signal of each color output from the liquid crystal signal control means based on the ratio; and gradation correction holding gradation correction data used by the gradation correction means. The liquid crystal display device according to claim 3, further comprising: a data storage unit. 6. The red display signal gradation control means, the green display signal gradation control means, and the blue display signal gradation control means, wherein the gradation value of each pixel in the red, green, and blue display signals is D / D Converting the liquid crystal display signal into a liquid crystal display signal using an A conversion unit, and correcting the gradation value of the liquid crystal display signal based on each color component ratio in the color component detection signal output from the external light color component detection unit. 3. The liquid crystal display device according to claim 2, wherein: 7. The liquid crystal panel display signal of each color outputted from the liquid crystal signal control means, wherein the red display signal gradation control means, the green display signal gradation control means, and the blue display signal gradation control means Converting the gradation value into a liquid crystal display signal using a D / A conversion unit, and correcting the gradation value based on each color component ratio in the color component detection signal output from the external light color component detection unit; The liquid crystal display device according to claim 3, wherein: 8. A signal electrode driving unit in which said red display signal gradation control means, green display signal gradation control means, blue display signal gradation control means, and said data side driving means are integrated on the same substrate. 4. The liquid crystal display device according to claim 3, wherein the liquid crystal display device is incorporated in the reflection type active matrix liquid crystal panel.