KR20150012050A - Liquid crystal display device - Google Patents

Liquid crystal display device Download PDF

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KR20150012050A
KR20150012050A KR1020130087390A KR20130087390A KR20150012050A KR 20150012050 A KR20150012050 A KR 20150012050A KR 1020130087390 A KR1020130087390 A KR 1020130087390A KR 20130087390 A KR20130087390 A KR 20130087390A KR 20150012050 A KR20150012050 A KR 20150012050A
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liquid crystal
driving electrode
crystal driving
thickness
color
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KR1020130087390A
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Korean (ko)
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KR102043853B1 (en
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허준영
김민기
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엘지디스플레이 주식회사
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)

Abstract

A liquid crystal display device according to the present invention includes: a first substrate on which color filters of a first color, a second color, and a third color are formed; A first liquid crystal driving electrode facing the color filter of the first color, a second liquid crystal driving electrode facing the color filter of the second color, and a third liquid crystal driving electrode facing the color filter of the third color A second substrate; A liquid crystal layer formed between the first substrate and the second substrate; And a backlight unit for irradiating light to the second substrate; Wherein each of the first liquid crystal driving electrode, the second liquid crystal driving electrode, and the third liquid crystal driving electrode includes at least two metal films, and a metal-organic material including at least one organic film formed between the metal films Layer structure.

Description

[0001] LIQUID CRYSTAL DISPLAY DEVICE [0002]

The present invention relates to a liquid crystal display device.

The liquid crystal display device has a wide application range due to features such as light weight, thinness, and low power consumption driving. This liquid crystal display device is used as a portable computer such as a notebook PC, an office automation device, an audio / video device, and an indoor / outdoor advertisement display device. A liquid crystal display device displays an image using a thin film transistor (hereinafter referred to as "TFT") as a switching element.

A liquid crystal display device having such characteristics includes two substrates facing each other and a liquid crystal layer formed therebetween. Specifically, as shown in Fig. 1, the liquid crystal display device is arranged such that the first substrate SUB1 on which the color filter array CF ARY is formed and the second substrate SUB2 on which the TFT array ARY is formed face each other, SUB1, and SUB2 of the liquid crystal layer LC having the dielectric anisotropy. A liquid crystal display device is driven in such a manner that a TFT formed in each of a plurality of pixels is switched and a data voltage for image display is applied to the corresponding pixel.

1, the first substrate SUB1 is provided with a color filter array CF ARY including a red color filter (RCF), a green color filter (GCF), and a blue color filter (BCF) And a black matrix BM for preventing optical interference between neighboring color filters are formed. (Including the data lines to which the data voltages are applied and the gate lines to which the scan pulse is applied) and the TFT arrays (including the TFTs ARY And liquid crystal driving electrodes ETD for applying an electric field to the liquid crystal layer LC are formed. The liquid crystal driving electrodes ETD include a first liquid crystal driving electrode ETD1 opposed to the red color filter RCF, a second liquid crystal driving electrode ETD2 opposed to the green color filter GCF, The third liquid crystal driving electrode ETD3 is opposed to the third liquid crystal driving electrode ETD3. The backlight unit BLU disposed on the back surface of the second substrate SUB2 includes a plurality of light sources that emit light to emit white light to the second substrate SUB2.

The white light emitted from the backlight unit BLU to the second substrate SUB2 is transmitted through the liquid crystal driving electrodes ETD and applied to the liquid crystal layer LC. Then, this white light is birefringent in the liquid crystal layer LC, is changed to a desired gradation, and is incident on the color filter array CF ARY. The red color filter (RCF) transmits only the red light among the white light incident on the red color filter (RCF), and absorbs light of different colors. The green color filter (GCF) transmits only green light among the white light incident on the green color filter (GCF) and absorbs light of a different color. Further, the blue color filter BCF transmits only blue light among the white light incident on the blue color filter BCF, and absorbs light of other colors.

Each of the color filters of the color filter array CF ARY selectively transmits only one of red light, green light, and blue light and absorbs the remainder. Therefore, in the conventional liquid crystal display device, only one third of the light generated in the backlight unit (BLU) is inevitably used, and accordingly, the light efficiency is reduced. In order to compensate for the decrease in luminance due to the lowering of the light efficiency, it is possible to consider using a high-luminance light source or increasing a driving power of a light source. In this case, however, power consumption of the liquid crystal display device is increased.

Accordingly, it is an object of the present invention to provide a liquid crystal display device capable of improving light efficiency through light recycling by changing the structure of electrodes for driving liquid crystal.

According to an aspect of the present invention, there is provided a liquid crystal display comprising: a first substrate on which color filters of first, second, and third colors are formed; A first liquid crystal driving electrode facing the color filter of the first color, a second liquid crystal driving electrode facing the color filter of the second color, and a third liquid crystal driving electrode facing the color filter of the third color A second substrate; A liquid crystal layer formed between the first substrate and the second substrate; And a backlight unit for irradiating light to the second substrate; Wherein each of the first liquid crystal driving electrode, the second liquid crystal driving electrode, and the third liquid crystal driving electrode includes at least two metal films, and a metal-organic material including at least one organic film formed between the metal films Layer structure.

The first color, the second color and the third color are respectively selected as red, green and blue.

Wherein the metal-organic laminate is composed of two metal films stacked with one organic film interposed therebetween, the thickness of the organic film being the largest in the first liquid crystal driving electrode, And is selected to be the thinnest at the third liquid crystal driving electrode.

The organic film is formed to a thickness of 1100 to 1300 ANGSTROM in the first liquid crystal driving electrode, a thickness of 850 to 1050 ANGSTROM in the second liquid crystal driving electrode, a thickness of 550 to 750 ANGSTROM in the third liquid crystal driving electrode do.

The organic film is formed to a thickness of 2800 to 3000 ANGSTROM in the first liquid crystal driving electrode, a thickness of 2300 to 2500 ANGSTROM in the second liquid crystal driving electrode, a thickness of 1800 to 2000 ANGSTROM in the third liquid crystal driving electrode, do.

Wherein the metal-organic laminate is composed of three metal films stacked with two organic films sandwiched therebetween, the thickness of each of the organic films being the thickest in the first liquid crystal driving electrode, Is thickest next in the liquid crystal driving electrode and thinnest in the third liquid crystal driving electrode.

Each of the organic layers is formed to a thickness of 1200 to 1300 ANGSTROM in the first liquid crystal driving electrode, a thickness of 950 to 1050 ANGSTROM in the second liquid crystal driving electrode, and a thickness of 700 to 800 ANGSTROM in the third liquid crystal driving electrode. .

Each of the organic layers is formed to have a thickness of 2950 to 3050 ANGSTROM at the first liquid crystal driving electrode, a thickness of 2400 to 2500 ANGSTROM at the second liquid crystal driving electrode, and a thickness of 1950 to 2050 ANGSTROM at the third liquid crystal driving electrode. .

The organic layer includes at least one organic material selected from Amine series including NPD, metal complex including Alq3, photo acryl, and Novlac series.

The metal film includes at least one of Ag, Cr, Mo, Au, Pt, and Ag alloy.

The first liquid crystal driving electrode, the second liquid crystal driving electrode, and the third liquid crystal driving electrode are each implemented as a pixel electrode to which a pixel driving data voltage is applied.

The first liquid crystal driving electrode, the second liquid crystal driving electrode, and the third liquid crystal driving electrode are each implemented by a pixel electrode to which a pixel driving data voltage is applied and a common electrode to which a pixel driving common voltage is applied.

The present invention can change the structure of the liquid crystal driving electrodes so that a part of the white light incident on the liquid crystal driving electrodes can be reflected toward the backlight unit, thereby enabling optical recycling, thereby improving the light efficiency, .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing the structure and operation of a conventional liquid crystal display; FIG.
2 is a view illustrating a liquid crystal display device according to an embodiment of the present invention.
FIG. 3A is a view showing a one-to-one structure between a pixel electrode and a common electrode; FIG.
FIG. 3B shows another opposing structure between the pixel electrode and the common electrode; FIG.
FIGS. 4 and 5 are diagrams illustrating optical recycling operations of the present invention. FIG.
6A is a view showing a wavelength vs. reflection curve of three-color light.
6B is a view showing a wavelength versus transmission curve of three-color light.
7 is a view showing a layered structure of electrodes for driving a liquid crystal for realizing optical recycling;
8 is a view showing another laminated example of electrodes for driving liquid crystals for realizing optical recycling.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Like reference numerals throughout the specification denote substantially identical components. In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

2 shows a liquid crystal display according to an embodiment of the present invention. FIG. 3A shows one opposing structure between the pixel electrode and the common electrode, and FIG. 3B shows another opposing structure between the pixel electrode and the common electrode.

The liquid crystal display device according to the present invention includes two substrates SUB1 and SUB2 facing each other as shown in Fig. 2, a liquid crystal layer LC formed therebetween, and a backlight unit BLU for generating white light.

The first substrate SUB1 includes a first color (hereinafter referred to as a red color filter), a second color (hereinafter, referred to as a green color filter) GCF and a third color (hereinafter referred to as a blue color filter) A color filter array CF ARY and a black matrix BM for preventing optical interference between neighboring color filters are formed.

The second substrate SUB2 is provided with a TFT array (TFT ARY) including pixel driving signal lines and TFTs formed at intersecting regions of the signal lines and liquid crystal driving electrodes ETD) is formed. The pixel driving signal lines include data lines to which the pixel driving data voltage is applied and gate lines to which the pixel selecting scanning pulse is applied. The data lines are connected to the data driver and receive the data voltage from the data driver. The gate lines are connected to the gate driver and receive a scan pulse from the gate driver.

The liquid crystal driving electrodes ETD include a first liquid crystal driving electrode ETD1 opposed to the red color filter RCF, a second liquid crystal driving electrode ETD2 opposed to the green color filter GCF, The third liquid crystal driving electrode ETD3 is opposed to the third liquid crystal driving electrode ETD3. Each of the first liquid crystal driving electrode ETD1, the second liquid crystal driving electrode ETD2 and the third liquid crystal driving electrode ETD3 includes at least two metal films and at least one And a metal-organic laminate including at least two organic films. The present invention changes the structure of the liquid crystal driving electrodes (ETD) so that a part of the white light incident on the liquid crystal driving electrodes (ETD) can be reflected toward the backlight unit (BLU), thereby achieving light recycling Thereby improving the light efficiency. As will be described later, the light reflected from the liquid crystal driving electrodes ETD toward the backlight unit BLU is the light that has been absorbed in the color filter array CF ARY in the related art.

The backlight unit BLU includes a plurality of light sources for irradiating light on the back surface of the second substrate SUB2. The backlight unit (BLU) may be implemented as either a direct type or an edge type. The direct-type backlight unit (BLU) has a structure in which a plurality of optical sheets and a diffusion plate are stacked on the rear surface of a second substrate (SUB2), and a plurality of light sources are disposed under the diffusion plate. The edge type backlight unit BLU has a structure in which a plurality of optical sheets and a light guide plate are stacked on the back surface of the second substrate SUB2 and a plurality of light sources are arranged on one side of the light guide plate. The light sources may be implemented by point light sources such as a light emitting diode (LED), but are not limited thereto.

Meanwhile, the present invention can be applied to both the vertical electric field driving method and the horizontal electric field driving method.

In a vertical electric field driving method such as a TN (Twisted Nematic) mode and a VA (Vertical Alignment) mode, the liquid crystal driving electrodes ETD may be implemented as a pixel electrode to which a pixel driving data voltage is applied as shown in FIG. That is, the first liquid crystal driving electrode ETD1, the second liquid crystal driving electrode ETD2, and the third liquid crystal driving electrode ETD3 may be implemented as pixel electrodes, respectively. In this case, the common electrode to which the pixel driving common voltage is applied may be formed on the first substrate SUB1 so as to face the pixel electrode vertically with the liquid crystal layer LC therebetween.

In the horizontal electric field driving method such as the IPS (In Plane Switching) mode and the FFS (Fringe Field Switching) mode, the liquid crystal driving electrodes ETD are driven by the pixel electrodes to which the pixel driving data voltage is applied, And a common electrode to which a common voltage is applied. That is, the first liquid crystal driving electrode ETD1, the second liquid crystal driving electrode ETD2, and the third liquid crystal driving electrode ETD3 may be implemented as a pixel electrode and a common electrode, respectively. The pixel electrode and the common electrode may be formed on the second substrate SUB2 such that the pixel electrode and the common electrode are horizontally opposed to each other with the liquid crystal layer LC interposed therebetween.

FIGS. 4 and 5 are views showing the optical recycling operation of the present invention. FIG. 6A shows a wavelength vs. reflection curve of three-color light consisting of red, green, and blue. 6B shows the wavelength versus transmission curve of the three-color light.

6A and 6B show the wavelength vs. reflection characteristic and the wavelength vs. transmission characteristic of the three-color light composed of red (R), green (G) and blue (B). The maximum reflection wavelength of red (R), green (G) and blue (B) increases in the order of blue (B) <green (G) <red (R) (B) <green (G) <red (R), the maximum transmission wavelength of green (G), blue (B)

In light of the optical characteristics of the three-color light, the present invention enables optical recycling by appropriately designing the liquid crystal driving electrodes ETD.

The metal-organic laminate constituting the first liquid crystal driving electrode ETD1 is a red (R), green (G), and blue (B) mixed white light incident from the backlight unit BLU R) light, green (G) light and blue (B) light are reflected by the backlight unit BLU. The transmitted red (R) light passes through the liquid crystal layer LC, is birefringent, is transmitted through the red color filter (RCF), and is displayed as an image of the corresponding pixel. The green (G) light and the blue (B) light reflected by the backlight unit (BLU) are recycled in the backlight unit (BLU), thereby contributing to enhancement of light efficiency.

The metal-organic laminate constituting the second liquid crystal driving electrode ETD2 is a green-light-emitting layer that emits white light of white light composed of a mixture of red (R), green (G) and blue (B) (R) light and blue (B) light to the backlight unit (BLU) instead of transmitting the red (G) light. The transmitted green (G) light is birefringent while passing through the liquid crystal layer LC, and then transmitted through a green color filter (GCF) to be displayed as an image of the corresponding pixel. The red (R) light and the blue (B) light reflected by the backlight unit (BLU) are recycled in the backlight unit (BLU), thereby contributing to enhancement of light efficiency.

The metal-organic laminate constituting the third liquid crystal driving electrode ETD3 is a white-colored light which is a mixture of red (R), green (G) and blue (B) B) light is reflected by the backlight unit BLU instead of transmitting the red (R) light and the green (G) light. The blue (B) light transmitted through the liquid crystal layer LC passes through the blue color filter BCF after being birefringent, and is displayed as an image of the corresponding pixel. The red (R) light and the green (G) light reflected by the backlight unit (BLU) are recycled in the backlight unit (BLU), thereby contributing to enhancement of light efficiency.

Fig. 7 shows a stacked example of electrodes for driving liquid crystal (ETD) for implementing optical recycling. 8 shows another laminated example of the liquid crystal driving electrodes ETD for implementing optical recycling.

The thickness of the organic film is related to the maximum transmission wavelength of red (R) light, green (G) light and blue (B) light, respectively. As the thickness of the organic film increases, the maximum transmission wavelength of each of the three color lights shifts in the direction of increasing. On the other hand, as the thickness of the organic layer increases, peak points related to the maximum transmission wavelength in the wavelength vs. transmission curve as shown in FIG. 6B may occur in each of the three color lights.

The thickness of the organic film is the thickest in the first liquid crystal driving electrode ETD1 in consideration of the optical characteristics of the three-color light, the thickest in the second liquid crystal driving electrode ETD2, and the third liquid crystal driving electrode ETD3 It is preferable to form the thinnest layer. However, if the thickness of the organic layer is selected to be 5000 ANGSTROM or more, many peak points are generated within the visible light region, thereby reducing the optical recycling effect of the present invention. Therefore, when the thickness of the organic layer is less than 5000 ANGSTROM, You have to choose.

Referring to FIG. 7, the metal-organic laminate of the liquid crystal driving electrodes ETD may be formed of a triple-layered film composed of two metal films stacked with one organic film interposed therebetween. Table 1 below shows possible organic film thicknesses, optimum organic film thicknesses, possible total thicknesses, and optimum total thicknesses for each liquid crystal driving electrode to realize the optical recycling effect. The following results were determined through a number of experiments.


 3 film (metal film 1 / organic film / metal film 2) Possible organic film thickness Optimal organic film thickness Possible total thickness (including metal film) Minimum total thickness (including metal film) The first liquid crystal driving electrode (R transmission, G / B reflection) 1100 to 1300 A,
2800 ~ 3000Å 1200 Å,
2900 Å 1600 to 1800 A,
3300 to 3500 A 1700 A,
3400 Å The second liquid crystal driving electrode (G transmission, R / B reflection) 850 to 1050 Å,
2300 ~ 2500 Å 950 A,
2400Å 1350 to 1550 A,
2800 to 3300 Å 1450 A,
2900 Å The third liquid crystal driving electrode (B transmission, R / G reflection) 550 to 750 A,
1800 to 2000 Å 700 Å,
1900Å 1050 to 1250 A,
2300 ~ 2500 Å 1200 Å,
2400Å

For example, the organic film for realizing the triple layer of FIG. 7 is formed to have a thickness of 1100 to 1300 Å, preferably 1200 Å, on the first liquid crystal driving electrode ETD 1 as shown in Table 1, ETD2 to 850 to 1050 ANGSTROM, preferably 950 ANGSTROM, and the third liquid crystal driving electrode ETD3 may have a thickness of 550 ANGSTROM to 750 ANGSTROM, preferably 700 ANGSTROM.

In this case, when the metal film 1 and the metal film 2 are formed to have a thickness of 250 ANGSTROM as shown in Table 1, the first liquid crystal driving electrode ETD1 is formed to a thickness of 1600 to 1800 ANGSTROM, preferably 1700 ANGSTROM, The driving electrode ETD2 may be formed to a thickness of 1350 to 1550 angstroms, preferably 1450 angstroms, and the third liquid crystal driving electrode ETD3 may be formed to have a thickness of 1050 to 1250 angstroms, preferably 1200 angstroms.

As another example, the organic film for realizing the triple layer of FIG. 7 is formed to have a thickness of 2800 to 3000 angstroms, preferably 2900 angstroms, in the first liquid crystal driving electrode ETD1 as shown in Table 1, ETD2 to 2300 ~ 2500 ANGSTROM, preferably 2400 ANGSTROM, and the third liquid crystal driving electrode ETD3 may have a thickness of 1800 ~ 2000 ANGSTROM, preferably 1900 ANGSTROM.

In this case, when the metal film 1 and the metal film 2 are formed to have a thickness of 250 ANGSTROM, the first liquid crystal driving electrode ETD1 is formed to have a thickness of 3300 to 3500 ANGSTROM, preferably 3400 ANGSTROM, The driving electrode ETD2 may be formed to have a thickness of 2800 to 3300 angstroms, preferably 2900 angstroms, and the third liquid crystal driving electrode ETD3 may have a thickness of 2300 to 2500 angstroms, preferably 2400 angstroms.

Meanwhile, referring to FIG. 8, the metal-organic laminate of the liquid crystal driving electrodes ETD may be formed of a five-layered film composed of three metal films stacked with two organic films sandwiched therebetween. Table 2 below shows possible organic film thicknesses, optimum organic film thicknesses, possible total thicknesses, and optimum total thicknesses for each liquid crystal driving electrode to realize the optical recycling effect. The following results were also determined through numerous experiments.


 5 film (metal film 1 / organic film / metal film 2 / organic film / metal film 3) Possible organic film thickness Optimal organic film thickness Possible total thickness (including metal film) Minimum total thickness (including metal film) The first liquid crystal driving electrode (R transmission, G / B reflection) 1200 to 1300 A,
2950-3050 1250 A,
3000 Å 2200 to 2300 A,
3950 to 4050 Å 2250,
4000 Å The second liquid crystal driving electrode (G transmission, R / B reflection) 950 to 1050 A,
2400 ~ 2500 Å 1000 Å,
2450 Å 1950 to 2050 A,
3400 to 3500 Å 2000 Å,
3450 A The third liquid crystal driving electrode (B transmission, R / G reflection) 700 to 800 A,
1950-2050 750 Å,
2000 Å 1700 to 1800 A,
2950-3050 1750 A,
3000 Å

8 is formed to have a thickness of 1200 to 1300 ANGSTROM, preferably 1250 ANGSTROM, in the first liquid crystal driving electrode ETD1 as shown in Table 2, and the second liquid crystal driving electrode ETD2), and the third liquid crystal driving electrode ETD3 may have a thickness of 700 to 800 ANGSTROM, preferably 750 ANGSTROM.

In this case, when the metal film 1 and the metal film 3 are formed to a thickness of 250 angstroms and the metal film 2 is formed to a thickness of 500 angstroms, respectively, as shown in Table 2, the first liquid crystal driving electrode ETD1 is 2200 to 2300 angstroms, And the third liquid crystal driving electrode ETD3 is formed to a thickness of 1700 to 1800 angstroms, preferably 1750 angstroms. The second liquid crystal driving electrode ETD2 is formed to a thickness of 1950 to 2050 angstroms, .

8 is formed to have a thickness of 2950 to 3050 angstroms, preferably 3000 angstroms, in the first liquid crystal driving electrode ETD1 as shown in Table 2, and the second liquid crystal driving electrode ETD2 to 2450A, preferably 2450A, and the third liquid crystal driving electrode ETD3 may have a thickness of 1950-2050 ANGSTROM, preferably 2000 ANGSTROM.

In this case, when the metal film 1 and the metal film 3 are formed to a thickness of 250 angstroms and the metal film 2 is formed to a thickness of 500 angstroms, the first liquid crystal driving electrode ETD1 has a thickness of 3950 to 4050 angstroms, The third liquid crystal driving electrode ETD3 is formed to a thickness of 2950 to 3050 angstroms, preferably 3000 angstroms, and the second liquid crystal driving electrode ETD2 is formed to have a thickness of 3,000 to 4,000 angstroms, the second liquid crystal driving electrode ETD2 is formed to have a thickness of 3400 to 3500 angstroms, .

7 and 8, the organic layer may include at least one organic material selected from the group consisting of NPD-containing amines, metal complexes containing Alq3, photo acryl, and Novlac series.

7 and 8, the metal films 1 to 3 may include at least one of Ag, Cr, Mo, Au, Pt, and Ag alloys.

As described above, according to the present invention, by changing the structure of the liquid crystal driving electrodes so that a part of the white light incident on the liquid crystal driving electrodes can be reflected toward the backlight unit, optical recycling is enabled, It is possible to prevent an increase in power consumption.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

SUB1, SUB2: substrate CF ARY: color filter array
LC: liquid crystal layer ETD: liquid crystal driving electrodes
TFT ARY: TFT Array BLU: Backlight Unit

Claims (12)

A first substrate on which color filters of a first color, a second color, and a third color are formed;
A first liquid crystal driving electrode facing the color filter of the first color, a second liquid crystal driving electrode facing the color filter of the second color, and a third liquid crystal driving electrode facing the color filter of the third color A second substrate;
A liquid crystal layer formed between the first substrate and the second substrate; And
A backlight unit for emitting light to the second substrate;
Wherein each of the first liquid crystal driving electrode, the second liquid crystal driving electrode, and the third liquid crystal driving electrode includes at least two metal films, and a metal-organic material including at least one organic film formed between the metal films Wherein the liquid crystal layer is formed of a laminate. The method according to claim 1,
Wherein the first color, the second color, and the third color are red, green, and blue, respectively. 3. The method of claim 2,
The metal-organic laminate is composed of two metal films stacked with one organic film interposed therebetween,
Wherein the thickness of the organic film is the thickest in the first liquid crystal driving electrode, the second thickest in the second liquid crystal driving electrode, and the thinnest in the third liquid crystal driving electrode. The method of claim 3,
The organic film is formed to a thickness of 1100 to 1300 ANGSTROM in the first liquid crystal driving electrode, a thickness of 850 to 1050 ANGSTROM in the second liquid crystal driving electrode, a thickness of 550 to 750 ANGSTROM in the third liquid crystal driving electrode And the liquid crystal display device. The method of claim 3,
The organic film is formed to a thickness of 2800 to 3000 ANGSTROM in the first liquid crystal driving electrode, a thickness of 2300 to 2500 ANGSTROM in the second liquid crystal driving electrode, a thickness of 1800 to 2000 ANGSTROM in the third liquid crystal driving electrode, And the liquid crystal display device. 3. The method of claim 2,
Wherein the metal-organic laminate is composed of three metal films stacked with two organic films sandwiched therebetween,
Wherein the thickness of each of the organic layers is the largest in the first liquid crystal driving electrode, the second thickest in the second liquid crystal driving electrode, and the thinnest in the third liquid crystal driving electrode. The method according to claim 6,
Each of the organic layers is formed to a thickness of 1200 to 1300 ANGSTROM in the first liquid crystal driving electrode, a thickness of 950 to 1050 ANGSTROM in the second liquid crystal driving electrode, and a thickness of 700 to 800 ANGSTROM in the third liquid crystal driving electrode. And the thickness of the liquid crystal layer. The method according to claim 6,
Each of the organic layers is formed to have a thickness of 2950 to 3050 ANGSTROM at the first liquid crystal driving electrode, a thickness of 2400 to 2500 ANGSTROM at the second liquid crystal driving electrode, and a thickness of 1950 to 2050 ANGSTROM at the third liquid crystal driving electrode. And the thickness of the liquid crystal layer. The method according to claim 1,
The organic film may include,
A metal complex including Alq3, a photo acryl, and a Novlac series. The liquid crystal display according to claim 1, The method according to claim 1,
The metal film
Ag, Cr, Mo, Au, Pt, or an Ag alloy. The method according to claim 1,
Wherein the first liquid crystal driving electrode, the second liquid crystal driving electrode, and the third liquid crystal driving electrode are each implemented as a pixel electrode to which a pixel driving data voltage is applied. The method according to claim 1,
Wherein the first liquid crystal driving electrode, the second liquid crystal driving electrode, and the third liquid crystal driving electrode are each implemented as a pixel electrode to which a pixel driving data voltage is applied and a common electrode to which a pixel driving common voltage is applied .
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070078244A (en) * 2006-01-26 2007-07-31 삼성전자주식회사 Display substrate and method of fabricating the same and display device including the same
JP2010056017A (en) * 2008-08-29 2010-03-11 Fujifilm Corp Color display device and method of manufacturing the same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070078244A (en) * 2006-01-26 2007-07-31 삼성전자주식회사 Display substrate and method of fabricating the same and display device including the same
JP2010056017A (en) * 2008-08-29 2010-03-11 Fujifilm Corp Color display device and method of manufacturing the same

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