KR101356272B1 - Polymer Dispersed Liquid Crystal Display and Manafacturing Method Thereof - Google Patents

Abstract

The present invention relates to a polymer dispersed liquid crystal display device, comprising: a lower substrate on which a thin film transistor and first and second electrodes are formed; An upper substrate on which a black matrix is formed; First and second reflecting plates formed in a diagonal direction between the upper and lower substrates; A polymer dispersed liquid crystal layer formed between the upper and lower substrates so as to be disposed under the black matrix between the first and second reflecting plates; A first resin layer supporting the first reflecting plate between the upper substrate and the lower substrate; And a second resin layer supporting the second reflecting plate between the upper substrate and the lower substrate.

Liquid Crystal Display, Polymer Dispersion, PDLC, Reflector, Transparent Resin

Description

Polymer Dispersed Liquid Crystal Display and Manafacturing Method Thereof}

1 is a schematic configuration diagram of a general polymer dispersed liquid crystal display.

2A and 2B are diagrams for describing a detailed operation principle of the PDLC display device of FIG. 1.

3 is a vertical cross-sectional view of a polymer dispersed liquid crystal display according to a first exemplary embodiment of the present invention.

4 is a vertical cross-sectional view of a polymer dispersed liquid crystal display according to a second exemplary embodiment of the present invention.

5A and 5B are diagrams for describing an on state and an off state of the polymer dispersed liquid crystal display according to the first exemplary embodiment of the present invention, respectively.

6A and 6B are diagrams for describing an on state and an off state of a polymer dispersed liquid crystal display according to a second exemplary embodiment of the present invention, respectively.

7A and 7B are views for explaining a planar structure in an on state and an off state of a polymer dispersed liquid crystal display according to an exemplary embodiment of the present invention, respectively.

8A to 8E are flowcharts illustrating a method of manufacturing a polymer dispersed liquid crystal display according to a first exemplary embodiment of the present invention.

9A to 9F are flowcharts illustrating a method of manufacturing a polymer dispersed liquid crystal display according to a second exemplary embodiment of the present invention.

DESCRIPTION OF THE REFERENCE NUMERALS

110: lower substrate 120: upper substrate

121: black matrix 130a, 130b: transparent resin (Resin)

141 and 142: aluminum reflector 151: polymer matrix

152: LC Droplet 153: Liquid Crystal Molecular Particles

154: pigments 161, 162: first and second electrodes

The present invention relates to a polymer dispersed liquid crystal display and a manufacturing method thereof.

In general, a liquid crystal display is an apparatus that displays an image by using optical anisotropy and birefringence characteristics of liquid crystal molecules, and a thin film transistor liquid crystal display (TFT LCD) using a thin film transistor (TFT) as a switching element is mainly used. It is used.

However, a general liquid crystal display device must use a polarizing plate, and since the light incident from the backlight unit is displayed to the outside after about 70 to 80% of the light is lost, the light efficiency is low, and the light scattering phenomenon according to the alignment process It has the same problem as phase distortion.

In order to solve this problem, a polymer dispersed liquid crystal (PDLC) display device has been proposed. Here, PDLC is a liquid crystal cell used in a liquid crystal display (LCD), and it is characterized in that the transmission of light is controlled according to the scattering intensity of the light, and does not require a polarizing plate. Several types of structures have been proposed, including a large number of liquid crystal molecular grains of several mm dispersed in a polymer material, and a liquid crystal contained in a reticulated polymer. That is, the liquid crystal material and the liquid crystal are non-uniformly dispersed and operated by using the difference in refractive index of the two materials.

In the PDLC display, when a voltage is not applied, the direction of the liquid crystal molecules becomes irregular, and scattering occurs at an interface having a different refractive index from the medium. In addition, when a voltage is applied, the direction of the liquid crystal becomes clear, and the refractive indices of both coincide to form a transmission state. At this time, if the thickness of the liquid crystal cell is not increased, the brightness is not ensured, and as a result, the driving voltage is increased.

Such a PDLC display device does not require an alignment layer and a polarizing plate, has flexibility, is easy to manufacture, and has excellent luminance characteristics, and thus can be used in a large display device, a projection TV, or the like.

1 is a schematic configuration diagram of a general polymer dispersed liquid crystal display.

Referring to FIG. 1, a typical polymer dispersed liquid crystal (PDLC) display device includes a PDLC 10, a backlight unit 20, and a reflector 30, and the PDLC 10 includes a polymer matrix 11 and a liquid crystal quadrature. (12), and the liquid crystal molecular particles 13 are interposed in the form of a capsule in the liquid crystal microsphere 12.

When the PDLC 10 is in the off state, i.e., when no voltage is applied, the small liquid crystal quadrilaterals are arranged randomly, and the light is scattered by being disturbed by the refraction of the liquid crystal quadrature 12 and the polymer matrix 11 and the dark state. Will be implemented. In addition, when the voltage is applied, that is, when the voltage is applied, the liquid crystal cells transmit white light because the liquid crystal cells are arranged in a row to reduce the difference in refractive index.

A detailed method of expressing the dark state and the white state of the polymer dispersed liquid crystal display will be described with reference to FIGS. 2A and 2B.

2A and 2B are diagrams for describing a detailed operation principle of the PDLC display device of FIG. 1.

Referring to FIGS. 2A and 2B, in the PDLC display, the lower substrate 14 including the first driving electrode 16 and the upper substrate 15 including the second driving electrode 17 are spaced at a predetermined interval. Opposite, a polymer matrix 11 is arranged between the lower substrate 14 and the upper substrate 15 in which nematic liquid crystal molecular particles 13 are arranged in the micro liquid crystal sphere 12. .

In the conventional PDLC display device having such a configuration, as shown in FIG. 2A when no voltage is applied between the first driving electrode 16 and the second driving electrode 17, the micro liquid crystal quadrature 12 The incident light is scattered by the refractive index difference between the polymer matrix 11 and the polymer matrix 11 to realize a dark state. That is, as shown in FIG. 2A, before the electric field is formed between the first and second driving electrodes 16 and 17, the liquid crystal molecular grains 13 in the micro liquid crystal quadruple 12 are random due to the absence of the alignment layer. Are arranged. As a result, the incident light is scattered while passing through the polymer matrix 11 to implement a dark state.

On the other hand, when a voltage is applied between the first driving electrode 16 and the second driving electrode 17 by the power supply device 18, as shown in FIG. The liquid crystal molecular grains 13 are arranged such that their long axis is parallel to the electric field. Therefore, the incident light passes through the polymer matrix layer 11 to implement a white state. That is, when the electric field E is formed between the first and second driving electrodes 16 and 17, the liquid crystal molecular grains 13 in the micro liquid crystal sphere 12 are arranged such that the electric field E and their long axes are parallel to each other. do. As the liquid crystal molecular particles 13 are uniformly arranged to be parallel to the electric field, a white state is realized.

The PDLC according to the prior art has high transmittance and perfect field-of-view characteristics, but due to the random scattering of light due to the randomly oriented LC droplet present in the polymer. There is a limit that dark is expressed only by. In addition, there is a problem in that a liquid crystal material and a process development are required accordingly because a rather high driving voltage is required.

An object of the present invention for solving the above problems is to provide a polymer dispersed liquid crystal display device and a method of manufacturing the same that can easily implement a dark state.

Another object of the present invention is to provide a polymer dispersed liquid crystal display and a method of manufacturing the same, which can improve driving voltage, response speed, and contrast ratio, compared to conventional PDLC.

Another object of the present invention is to provide a polymer dispersed liquid crystal display and a method of manufacturing the same, which can reduce the material cost by reducing the use of PDLC materials.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

A polymer dispersed liquid crystal display of the present invention includes a thin film transistor, a lower substrate on which first and second electrodes are formed; An upper substrate on which a black matrix is formed; First and second reflecting plates formed in a diagonal direction between the upper and lower substrates; A polymer dispersed liquid crystal layer formed between the upper and lower substrates so as to be disposed under the black matrix between the first and second reflecting plates; A first resin layer supporting the first reflecting plate between the upper substrate and the lower substrate; And a second resin layer supporting the second reflecting plate between the upper substrate and the lower substrate.
The polymer dispersed liquid crystal layer includes a polymer matrix, a liquid crystal quadrature formed in a dispersed form in the polymer matrix, and liquid crystal molecular grains interposed in a capsule form in the liquid crystal quadrangle.
The first resin layer is formed on the upper substrate, and the second resin layer is formed on the upper substrate or the lower substrate.
The method of manufacturing the polymer dispersed liquid crystal display includes forming a black matrix on an upper substrate; Forming resin layers between the upper substrate and the lower substrate to support each of the first and second reflecting plates that are inclined diagonally between the upper substrate and the lower substrate; Forming a thin film transistor and first and second electrodes on the lower substrate; Forming a high molecular dispersed liquid crystal layer between the upper and lower substrates so as to be disposed under the black matrix between the first and second reflecting plates; And bonding the upper substrate and the lower substrate.

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Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be embodied in various different forms, only the present embodiments are provided to make the disclosure of the present invention complete and the general knowledge in the art to which the present invention belongs. It is provided to fully inform the person having the scope of the invention, the invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, a polymer dispersed liquid crystal display and a method of manufacturing the same according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

3 is a vertical cross-sectional view of a polymer dispersed liquid crystal display according to a first exemplary embodiment of the present invention.

Referring to FIG. 3, the polymer dispersed liquid crystal display according to the first exemplary embodiment of the present invention may include a lower substrate 110, an upper substrate 120, a polymer dispersed liquid crystal layer, and first and second reflecting plates 141. , 142, and the first and second reflecting plates 141 and 142 are supported by the transparent resin layer 130a, respectively.

The lower substrate 110 is formed of a thin film transistor TFT and first and second electrodes 161 and 162. Here, since the thin film transistor TFT is formed in the same manner as a general liquid crystal display, a detailed description thereof will be omitted.

In addition, the first and second electrodes 161 and 162 form a horizontal electric field in the polymer dispersed liquid crystal layer. Here, the method of forming the horizontal electric field is the same as that of the horizontal electric field type liquid crystal display device, and thus detailed description thereof will be omitted.

The first and second transparent resin layers 130a support the first and second reflecting plates 141 and 142 in a diagonal direction, and the first and second transparent resin layers 130a are the upper substrate 120. Is formed on the phase.

The black substrate 121 is formed on the upper substrate 120 to correspond to the thin film transistor (TFT) formation region.

The polymer dispersed liquid crystal layer is formed between the upper and lower substrates 110 and 120 to be disposed between the first reflecting plate 141 and the second reflecting plate 142 under the black matrix 121. In this case, the polymer dispersed liquid crystal layer is formed by dropping in an inkjet method, and the polymer dispersed liquid crystal layer may have a protrusion shape for forming a cell gap. That is, since the PDLC according to the embodiment of the present invention is formed in the form of a protrusion and serves as a gap spacer, cell gap retention may be improved.

The polymer dispersed liquid crystal layer includes a polymer matrix (151), a liquid crystal quadrature 152 formed in a dispersed form in the polymer matrix, and a liquid crystal molecular grain 153 interposed in a capsule form in the liquid crystal quadrangle. It may further include a pigment particle 154 added in the polymer matrix 151 to express a color.

The first and second reflecting plates 141 and 142 are formed on both sides of the polymer dispersed liquid crystal layer in diagonal directions to reflect incident light.

Meanwhile, an empty space may be formed from an upper portion of the thin film transistor TFT to the first reflecting plate 141.

In addition, when a voltage is applied between the first and second electrodes 141 and 142, the polymer dispersed liquid crystal layer is turned on so that light provided from a backlight unit (not shown) is supplied to the first reflecting plate 141. ), Via the polymer dispersed liquid crystal layer and the second reflection plate 142.

In addition, when no voltage is applied between the first and second electrodes 141 and 142, the polymer dispersed liquid crystal layer is turned off, and the light provided from the backlight unit is reflected from the first reflecting plate 141. The polymer dispersed liquid crystal layer blocks light. Here, when no voltage is applied between the first and second electrodes 141 and 142, the first and second reflecting plates 141 and 142 may serve as mirrors.

4 is a diagram illustrating a vertical cross section of a polymer dispersed liquid crystal display according to a second exemplary embodiment of the present invention.

Referring to FIG. 4, the polymer dispersed liquid crystal display according to the second exemplary embodiment of the present invention may include a lower substrate 110, an upper substrate 120, a polymer dispersed liquid crystal layer, and first and second reflecting plates 141. , 142, and the first and second reflecting plates 141 and 142 are supported by the transparent resin layers 130a and 130b, respectively.

That is, the first transparent resin layer 130a supporting the first reflecting plate 141 is formed on the upper substrate 120 and the second transparent resin layer 130b supporting the second reflecting plate 142. Except for being formed on the lower substrate 110, since the same as the first embodiment described above, a detailed description thereof will be omitted.

5A and 5B are diagrams for describing an on state and an off state of the polymer dispersed liquid crystal display according to the first embodiment of the present invention, respectively.

5A and 5B illustrate cross-sectional views of an on state and an off state of a polymer dispersed liquid crystal display according to a first embodiment of the present invention. Reference numerals 161 and 162 denote pixel electrodes and a common electrode, respectively, and include a lower substrate 110. ) To form a horizontal electric field, and may change the light transmittance of the liquid crystal sphere 152 dispersed in the polymer matrix 151. The liquid crystal droplets 152 dispersed in the polymer matrix 151 are dropped by an inkjet method and adhered to the lower substrate 110 by a UV curing process.

The liquid crystal quadruple 152 is dispersed in the polymer matrix 151 in a capsule form to form liquid crystal molecular grains 153, and a horizontal electric field is formed according to voltage application by the two electrodes 161 and 162. Will change.

This structure takes advantage of the phenomenon that when the liquid itself is transparent but does not dissolve with each other and when two kinds of liquids having different refractive indices are forcibly mixed, the whole becomes an opaque creamy white color. This phenomenon occurs not only because each liquid in the mixed state becomes opaque, but also because light is scattered at the interface when light passes through the interface due to different refractive indices of the two liquids.

When the liquid crystal quadrature 152 is formed into a small capsule in the polymer matrix 151 to be dispersed, as shown in FIG. 5B, between the liquid crystal molecular grains 153 and the polymer matrix 151 in a state where no voltage is applied. All incident light is scattered due to the difference in refractive index, resulting in a milky white opaque state.

However, when a voltage is applied from the outside, as shown in FIG. 5A, since the liquid crystal quadrature 152 of each liquid crystal molecular particle 153 is aligned in the horizontal electric field direction, the refractive index becomes constant for all particles. Here, when the refractive index of the polymer matrix 151 serving as the dispersion catalyst and the refractive index of the liquid crystal quadrature 152 coincide with each other, scattering does not occur at the interface between the two and the transparent matrix appears.

Accordingly, the polymer dispersed liquid crystal (PDLC) display device may be applied to a display device in which the transmittance is changed according to on / off of voltage.

In general, the polymer dispersed liquid crystal (PDLC) has a form in which liquid crystal droplets 152 having a diameter of 1 to 2 μm are dispersed in polymer films having various thicknesses. When the polymer dispersed liquid crystal (PDLC) film is sandwiched between two transparent electrodes and the electric field is applied, the director of the liquid crystal is oriented in the electric field direction, and when the refractive index of the liquid crystal coincides with the refractive index of the polymer, The film becomes transparent.

In the exemplary embodiment of the present invention, the polymer dispersed liquid crystal (PDLC) film is sandwiched between two transparent electrodes and not subjected to an electric field, but forms a transverse electric field like a general transverse electric field liquid crystal display device. Since the liquid crystal layer PDLC is formed only under the black matrix, the amount of the polymer liquid crystal layer PDLC may be reduced, and the dark state may be easily implemented. That is, the black matrix serves as the light shielding, and the light path passes through the above-described first reflecting plate 141, the polymer dispersed liquid crystal layer, and the second reflecting plate 142, thereby facilitating the dark state when no voltage is applied. Can be implemented.

Specifically, when the electric field is removed, the directors of the liquid crystal molecular grains 153 are disordered by surface anchoring energy, and the effective refractive index of the liquid crystal molecular grains 153 is greatly deviated from the refractive index of the polymer, thereby causing the refractive index mismatch. The interfacial light scattering makes the film opaque.

6A and 6B are diagrams for describing an on state and an off state of the polymer dispersed liquid crystal display according to the second exemplary embodiment of the present invention, respectively.

6A and 6B are substantially the same as the on (off) state and the off (off) state except for the above-described structure of FIGs.

That is, FIGS. 5A and 5B are polymer dispersed liquid crystal displays having the same structure as in FIG. 3, and FIGS. 6A and 6B are polymer dispersed liquid crystal displays having the same structure as in FIG. The On state and the Off state can be implemented in the same way.

7A and 7B are diagrams for describing a planar structure of an on state and an off state of a polymer dispersed liquid crystal display according to an exemplary embodiment of the present invention, respectively.

Referring to FIG. 7A, the screen before driving the screen is covered with aluminum (Al) reflectors 141 and 142 so that the screen may be used as a mirror. Here, reference numerals 111 and 112 denote gate lines and data lines, respectively. Reference numeral A denotes a portion where the PDLCs 151, 152 and 153 are formed.

In the Off state, the light from the backlight (B / L) unit is dark because the front of the screen does not pass through the random PDLC layer formed under the aluminum (Al) reflective layer, so it is dark. (Dark) state can be expressed.

Therefore, by expressing black in the aluminum (Al) anti-reflective state due to the complete blocking of the side light, it is possible to express more vivid hue.

Referring to FIG. 7B, after driving the screen, light is displayed to the outside via the first reflecting plate 141, the PDLCs 151, 152, and 153, and the second reflecting plate 142. Substantially, PDLCs 151, 152, and 153 are not visible from the outside by the black matrix, but are shown for convenience of description.

As shown in FIG. 7B, when light provided from the backlight unit passes through the inside of the cell, high quality on / off is possible due to the light quantity control ability of the PDLC layer serving as a micro shutter that receives PDLC side light. In addition to enabling on / off switching, the design, process and material characteristics are simplified.

That is, in the on state, the light from the backlight B / L is formed with a PDLC layer having a constant directionality by the electric field, so that micro-projection is realized and the white state can be expressed. At this time, it is required to select a material such that the refractive index in the short axis direction of the liquid crystal coincides with the polymer refractive index.

Meanwhile, the area ratio of the light incident portion and the portion where the light is displayed and the inclination angles of the reflecting plates 141 and 142 may be adjusted according to the efficiency of the reflected light and the optical characteristic requirements.

In addition, when sufficient color expression is required, the color may be corrected by adjusting the pigment solution type and content in the pigment component added in the PDLC.

8A to 8E are flowcharts illustrating a method of manufacturing the polymer dispersed liquid crystal display according to the first embodiment of the present invention.

First, referring to FIG. 8A, a black matrix 121 is formed on the upper substrate 120.

Next, referring to FIG. 8B, first and second transparent resin layers 130a having the first and second reflecting plates 141 and 142 attached to each other in a diagonal direction are formed on both sides of the black matrix 121.

Next, referring to FIG. 8C, a thin film transistor TFT and first and second electrodes 161 and 162 are formed on the lower substrate 110. The first and second electrodes 161 and 162 are a pixel electrode and a common electrode for forming a horizontal electric field.

Next, referring to FIG. 8D, a polymer dispersed liquid crystal layer is formed on the lower substrate 110 corresponding to the lower side of the black matrix 121. Here, the polymer dispersed liquid crystal layer is composed of a polymer matrix 151, a liquid crystal quadrature 152, liquid crystal molecular grains 153, and pigment particles 154, and the polymer dispersed liquid crystal layer may be dropped by an inkjet method. Subsequently, the polymer dispersed liquid crystal layer may be dropped by an inkjet method and then fixed by a curing process.

Herein, the upper substrate 120 forming process and the lower substrate 110 forming process may be separately performed.

Therefore, referring to FIG. 8E, the manufacturing process is completed by bonding the upper substrate 120 and the lower substrate 110 formed as described above.

Meanwhile, an empty space may be formed from an upper portion of the thin film transistor TFT to the first reflecting plate 141.

9A to 9F are flowcharts illustrating a method of manufacturing a polymer dispersed liquid crystal display according to a second exemplary embodiment of the present invention.

First, referring to FIG. 9A, a black matrix 121 is formed on the upper substrate 120.

Next, referring to FIG. 9B, a first transparent resin layer 130a having the first reflecting plate 141 attached in a diagonal direction is formed on one side of the black matrix 121.

Next, referring to FIG. 9C, the thin film transistor TFT and the first and second electrodes 161 and 162 are formed on the lower substrate 110. The first and second electrodes 161 and 162 are a pixel electrode and a common electrode for forming a horizontal electric field.

Next, referring to FIG. 9D, a second transparent resin layer 130b having the second reflecting plate 142 attached thereto is formed on the lower substrate 110.

Next, referring to FIG. 9E, a polymer dispersed liquid crystal layer is formed on the lower substrate 110 corresponding to the lower side of the black matrix 121. Here, the polymer dispersed liquid crystal layer is composed of a polymer matrix 151, a liquid crystal quadrature 152, liquid crystal molecular grains 153, and pigment particles 154, and the polymer dispersed liquid crystal layer may be dropped by an inkjet method. Subsequently, the polymer dispersed liquid crystal layer may be dropped by an inkjet method and then fixed by a UV curing process.

Here, the upper substrate 120 forming process and the lower substrate 110 forming process may be performed separately, respectively.

Therefore, referring to FIG. 9F, the manufacturing process is completed by bonding the upper substrate 120 and the lower substrate 110 together.

As a result, according to the embodiment of the present invention, while maintaining the high transmittance and viewing angle characteristics of the general PDLC, it has the characteristics as a low-cost high-quality display.

That is, in order to maximize screen darkness when off, the PDLC layer may not be directly seen from the front of the screen, thereby improving the dark quality. In addition, the PDLC may be formed to have a high panel gap as needed to improve the contrast ratio, and the PLDC may be formed to have a low panel gap to improve the response speed and the driving voltage.

In other words, the PDLC may be formed to have a high panel gap to improve the contrast ratio, and the PLDC may be formed to have a low panel gap to improve the response speed and driving voltage.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

According to the present invention, by forming the PDLC under the black matrix, it is possible to easily improve the black characteristics. In addition, since it can proceed without the alignment film coating, rubbing, polarizing plate attachment process, it is possible to simplify the process and reduce the investment cost. In addition, since the amount of the liquid crystal LC can be reduced without using the polyimide liquid (PI), the blister plate and the color filter as the alignment liquid, the material cost can be reduced. In addition, it is possible to implement a wide viewing angle and high brightness, it is possible to properly adjust the driving voltage and response speed or contrast ratio compared to the conventional PDLC.

Claims (27)

A lower substrate on which the thin film transistor and the first and second electrodes are formed; An upper substrate on which a black matrix is formed; First and second reflecting plates formed in a diagonal direction between the upper and lower substrates; A polymer dispersed liquid crystal layer formed between the upper and lower substrates so as to be disposed under the black matrix between the first and second reflecting plates; A first resin layer supporting the first reflecting plate between the upper substrate and the lower substrate; And A second resin layer supporting the second reflecting plate between the upper substrate and the lower substrate, The polymer dispersed liquid crystal layer includes a polymer matrix, a liquid crystal quadrangle formed in a dispersed form in the polymer matrix, and liquid crystal molecular grains interposed in a capsule form in the liquid crystal quadrangle, Wherein the first resin layer is formed on the upper substrate, and the second resin layer is formed on the upper substrate or the lower substrate. The method of claim 1, Wherein the first electrode and the second electrode form a horizontal electric field in the polymer dispersed liquid crystal layer. delete delete delete delete The method of claim 1, When a voltage is applied between the first and second electrodes, the polymer dispersed liquid crystal layer is turned on so that light provided from the backlight unit passes through the first reflecting plate, the polymer dispersed liquid crystal layer, and the second reflecting plate. and, If no voltage is applied between the first and second electrodes, the polymer dispersed liquid crystal layer is turned off, and the polymer dispersed liquid crystal layer blocks light reflected from the first reflector from the light provided from the backlight unit. A polymer dispersed liquid crystal display, characterized in that. delete delete delete The method of claim 1, A polymer dispersed liquid crystal display further comprising pigment particles added in the polymer matrix to express colors. delete The method of claim 1, The polymer dispersed liquid crystal layer is a polymer dispersed liquid crystal display device, characterized in that the projection form for forming a cell gap. a) forming a black matrix on the upper substrate; b) forming first and second resin layers between the upper substrate and the lower substrate, each supporting first and second reflecting plates that are inclined diagonally between the upper substrate and the lower substrate; c) forming a thin film transistor and first and second electrodes on the lower substrate; d) forming a polymer dispersed liquid crystal layer between the upper and lower substrates to be disposed below the black matrix between the first and second reflecting plates; And e) bonding the upper substrate and the lower substrate, The polymer dispersed liquid crystal layer includes a polymer matrix, a liquid crystal quadrangle formed in a dispersed form in the polymer matrix, and liquid crystal molecular grains interposed in a capsule form in the liquid crystal quadrangle, And wherein the first resin layer is formed on the upper substrate, and the second resin layer is formed on the upper substrate or the lower substrate. The method of claim 14, The first and second electrodes are a pixel electrode and a common electrode for forming a horizontal electric field, the method of manufacturing a polymer dispersed liquid crystal display device. The method of claim 14, The polymer dispersed liquid crystal layer is dropped in an inkjet method and then fixed by a curing process. delete delete The method of claim 14, When a voltage is applied between the first and second electrodes, the polymer dispersed liquid crystal layer is turned on so that light provided from the backlight unit passes through the first reflecting plate, the polymer dispersed liquid crystal layer, and the second reflecting plate. and, If no voltage is applied between the first and second electrodes, the polymer dispersed liquid crystal layer is turned off, and the polymer dispersed liquid crystal layer blocks light reflected from the first reflector from the light provided from the backlight unit. Method for producing a polymer dispersed liquid crystal display, characterized in that. delete delete delete delete delete delete delete delete

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