KR19980014147A - Panel of display device and method of manufacturing - Google Patents

Abstract

The panel of the display device according to the present invention may be configured such that a plurality of motion parts made of a piezoelectric material are provided in a columnar form in a light transmissive conductive layer of a unit pixel of a drive substrate without using liquid crystal and a polarizer plate, , The color filter substrate is formed of color microlenses, and a predetermined gap is maintained between the color filter substrate and the driving substrate.

In the present invention, a TFT, which is a switching element of a unit pixel, is switched to perform a length variable movement, that is, contraction or expansion, so that light of a backlight source passes through a microlens of a driving substrate, Or displays the desired information.

Therefore, since the light of the light source is passed through the empty space of the driving substrate, the empty space between the driving substrate and the color filter substrate, and the microlenses without passing through the liquid crystal and the polarizer, the loss of light can be reduced to thereby increase the light efficiency and the viewing angle Effect.

Description

Panel of display device and method of manufacturing

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, and more particularly, to a panel of a display device for varying a distance between a microlens of a driving substrate and a color microlens of a color filter substrate to obtain a high optical efficiency and a wide viewing angle.

A cathode ray tube (CRT), which is one of the widely used display devices, is mainly used for monitors such as a TV, a measurement device, and an information terminal device. However, due to the large weight and size of the CRT itself, , It could not actively cope with the demand for weight reduction.

In order to replace such a CRT, a liquid crystal display (LCD) having the advantages of miniaturization and light weight has been actively developed and recently developed to sufficiently fulfill its role as a flat panel display.

1 is a cross-sectional view schematically showing a panel structure of a conventional liquid crystal display device.

A panel of a conventional liquid crystal display device includes a driving substrate 1, a color filter substrate 3, a liquid crystal 5 filled between the driving substrate 1 and the color filter substrate 3, Lt; / RTI > Polarizing plates 2 and 4 are formed on outer layers of the driving substrate 1 and the color filter substrate 3, respectively.

In the panel of the conventional liquid crystal display device configured as described above, when the TFT elements (not shown), which are switching elements of the driving substrate 1, are selectively driven by an external driver IC, The liquid crystal 5 is aligned.

At this time, the light emitted from the backlight light source 7 provided on the rear portion of the driving substrate 1 is transmitted through the polarizing plate 2 of the driving substrate 1, the aligned liquid crystal 5 and the color filter substrate 3 (Not shown) and the polarizing plate 4, the desired information such as characters, figures, symbols, and the like are displayed.

However, in the conventional liquid crystal display device, since the liquid crystal and the polarizing plate act as light blocking means, there is a problem that the light emitted from the light source passes through the liquid crystal and the polarizing plate, thereby causing a considerable loss of light. Further, the conventional liquid crystal display device has a problem that the viewing angle is narrow.

Accordingly, an object of the present invention is to provide a display device having a high optical efficiency and a wide viewing angle, and a method of manufacturing the same.

1 is a cross-sectional view schematically showing a panel structure of a conventional liquid crystal display device.

2 is a block diagram schematically showing a panel structure of a display device according to the present invention.

3 (A) to 3 (G) are process drawings showing a panel manufacturing method of a display device according to the present invention.

DESCRIPTION OF THE REFERENCE NUMERALS

1: driving substrate 2, 4: polarizer 3: color filter substrate 5: liquid crystal 7: light source

10: Driving substrate 11: Driving portion 11a: Transparent substrate 11b: Switching element 11c: Transparent electrode

The present invention relates to a color filter substrate, and more particularly, to a color filter substrate, a color filter substrate, a transparent matrix substrate,

According to an aspect of the present invention, there is provided a display apparatus including spacing means for maintaining a predetermined distance between a driving substrate and a color filter substrate, wherein an empty space exists between the driving substrate and the color filter substrate, A plurality of unit pixels formed on the unit pixel, a microlens formed on the unit pixel at a predetermined distance, and a column-shaped unit for varying a distance between the driving substrate and the color filter substrate, And the killer filter panel has color microlenses. According to the variable movement such as contraction and expansion of the movement part, the light of the backlight source passing through the microlenses of the driving substrate is transmitted to the micro- By forming or not forming a focus on the lenses, To show the features.

According to another aspect of the present invention, there is provided a method of manufacturing a display device, comprising: forming a moving part made of a columnar piezoelectric material on an upper side of a unit pixel of a driving part; and forming a microlens made of a light- A step of manufacturing a color filter substrate for forming color microlenses on a light transmitting substrate, and a step for maintaining a gap between the driving substrate and the color filter substrate.

Hereinafter, a panel of a display device according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a schematic view showing the panel structure of the display apparatus according to the present invention.

As shown in the figure, the panel of the display device according to the present invention has a structure in which the driving substrate 10 and the color filter substrate 30 are maintained at a constant interval by the gap maintaining means 40.

The driving substrate 10 includes a driving unit 11, a plurality of motion units 13 formed at a predetermined interval at the edges of the unit pixels of the driving unit 11, And a lens 15.

The driving unit 11 has a transparent substrate 11a and a switching element 11b and a transparent electrode 11c formed in the unit pixel region of the transparent substrate 11a. The switching element 11b and the transparent electrode 11c are electrically connected. The transmissive substrate 11a is a glass substrate, the switching element 11b is a TFT, and the transmissive electrode 11c is made of a material such as ITO or MgO. There is an empty space 14 between the transparent electrode 11c and the microlenses 15 of the unit pixel. The moving part 13 is made of a piezoelectric material in the form of a column.

The color filter substrate 30 includes a translucent substrate 31 and red, blue and green color microlenses 33 formed on both sides of the translucent substrate 31 corresponding to the unit pixels, And a black matrix 32 for distinguishing the respective color microlenses 33 from each other.

A space 41 is provided between the driving substrate 10 and the color filter substrate 30 to provide a space 41.

A panel manufacturing method of the display device having such a structure will now be described with reference to FIGS. 3A to 3G. FIG.

First, a driving substrate 10 as shown in Fig. 2 is prepared. For the sake of convenience of description, only the area of the unit pixel is described.

As shown in Fig. 3 (A), the driving unit 11 is formed using a conventional method. More specifically, a switching element 11b such as a TFT and a transparent electrode 11c electrically connected to the switching element 11b are formed on a region for a unit pixel of a transparent substrate 11a such as a glass substrate do.

Then, a metal layer 12, for example, aluminum (Al), molybdenum (Mo), or PVA (polyvinyl alcohol), which is easy to be etched, is formed on the entire surface of the switching element 11b and the transparent electrode 11c by a predetermined thickness .

Then, only the metal layer 12 of the areas for the motion part 13 in Fig. 3 (C), that is, the metal layers 12 at the predetermined intervals along the edge of the transparent electrode 11c is selectively etched by a conventional method.

A piezoelectric layer made of a piezoelectric material for the moving part 13, for example, PZT, is formed on the entire surface of the remaining metal layer 12 to have a predetermined thickness, as shown in FIG. 3 (B).

Then, the piezoelectric layer is etched until the upper surface of the metal layer 12 is exposed by using a reactive ion etching method having an anisotropic etching property so that a columnar motion portion 13 is formed on the edge of the transparent electrode 11c . At this time, the side surface of the metal layer 12 is partially covered by the moving part 13, and most of it is exposed.

A transparent conductive layer 16 for the microlens 15 of eh 3 (D) is formed on the upper surface of the metal layer 12 and the moving part 13 as shown in Fig. 3 (C) A film 17 in the form of a convex lens for the microlens 15 is formed on the upper surface of the layer 16.

More specifically, the film 17 for the microlens 15, for example, a photoresist film is coated on the transmissive conductive layer 16, and then the photoresist film is patterned to be located only on the light-transmissive conductive layer 16. Then, the patterned photoresist film is annealed to form a convex lens-shaped film 17.

As shown in FIG. 3D, the convex lens-shaped film 17 is completely etched by reactive ion etching having anisotropic etching characteristics to form a convex lens-shaped transmissive conductive layer 16, (15).

More specifically, as the thickness of the film 17 decreases toward the edge of the film 17, the film 17 at the edge is already etched while the thick film 17 at the center is completely etched, The conductive layer 16 starts to be exposed. Therefore, a convex lens-shaped microlens 15 corresponding to the convex lens-shaped film 17 is formed.

The technique of forming the microlenses is known as disclosed in U.S. Patent No. 5,466,926, the disclosure of which is incorporated herein by reference.

Lastly, the metal layer 12, on which most of the side portions are exposed, is etched to complete the driving substrate 10 of FIG. The microlens 15 is entirely supported by the translucent electrode 11c of the driving unit 10 by the moving unit 13 and is provided between the moving unit 13 and the microlens 15, Space 14 is created.

3 (F), the color filter substrate 30 is prepared separately from the driving substrate 10. For example, a film for a color micro-lens 33, for example, a photosensitive film colored with a first color may be coated on the transparent substrate 31, for example, a glass substrate, The photoresist film is patterned into a pattern for the microlenses of the first color. The patterned first color photosensitive film is annealed to form color microlenses 33a of the first color.

Color microlenses 33b and 33c of a second color and a third color are formed on the upper surface of the substrate 31 using the above-described method. The first, second, and third colors may be red, green, or blue.

Thereafter, a color microlens 35 is formed on the lower surface of the substrate 31 using the same method. More specifically, the microlenses 33a, 33b, 33c are formed under the microlenses 33a, 33b, 33c with microlenses of the same color as the microlenses 33a, 33b, (35a), (35b), and (35c), respectively.

The pattern of the black matraxes 32 is formed on the substrate 31 at the boundary between the microlenses 35a, 35b and 35c to complete the color filter substrate 30. FIG.

The driving substrate 10 and the color filter substrate 30 are formed by using the space maintaining means 40 after the driving substrate 10 and the color filter substrate 30 are prepared as shown in Figure 3 (G) Keep them at a constant spacing.

The micro lenses 15 of the driving substrate 10 after forming spacing means 40, for example, spacers, at boundary points of the microlenses 15 of the driving substrate 10, The black matrix 32 of the color filter substrate 30 is fixed to the gap maintaining means 40 in correspondence with the microlenses 35 of the color filter substrate 30 and the microlenses 35 of the color filter substrate 30. At this time, an empty space 41 exists between the driving substrate 10 and the color filter substrate 30.

Alternatively, a resin (not shown) may be formed along the edge of the drive substrate 10 by using a resin instead of the spacer or by using the spacer to keep the gap between the two panels 10, 30 constant It is possible. Therefore, the panel of the display device of the present invention is completed as shown in Fig.

The operation of the panel of the display device of the present invention thus manufactured will be briefly described below.

First, a signal for switching the switching element 11b, for example, a TFT, of the driving unit 11 of the driving substrate 10 is applied to the switching element 11b.

When the switching element 11b is turned on, the moving part 13 formed in a plurality of column shapes shrinks in the longitudinal direction and the switching element 11b is turned off, the moving part 13 expands in the longitudinal direction, The length of the optical fiber is variable.

Therefore, when the switching element 11b is turned on, the light from the backlight light source 50 provided on the rear surface of the driving substrate 10 passes through the microlens 15 of the driving unit 11, The microlenses 33 and 35 of the optical system are focused to form a true image. Conversely, when the switching element 11b is turned off, no light is focused on the microlenses 33 and 35 of the color filter substrate 30 as the light of the light source 50 passes through the microlens 15, . At this time, since the light of the light source 50 passes through the empty spaces 14 and 41, the light loss is reduced accordingly.

As described above, according to the present invention, the light of the light source for backlight passes through the microlens of the driving substrate to shrink or expand the motion unit without using the liquid crystal and the polarizing plate at all, The desired information can be displayed.

In addition, since the light of the light source passes through the empty space of the driving substrate and the empty space between the driving substrate and the color filter substrate without passing the light through the liquid crystal and the polarizer, loss of light is reduced so that the light efficiency is high and the viewing angle is wide .

Claims (30)

A driving unit having a light-transmissive substrate and switching elements and translucent electrodes of the unit pixels formed on the transmissive substrate; a moving part formed on each of the unit pixels and performing a variable length movement; A drive substrate including lenses; A color filter substrate having color microlenses corresponding to the microlenses of the driving substrate; And a space maintaining means for holding and fixing the driving substrate and the color filter substrate at a predetermined interval. The panel of claim 1, wherein the moving part is made of a piezoelectric material. The panel of the display device according to claim 1 or 2, wherein the moving part is formed in a column shape on the light-transmitting electrode of the unit pixel. The panel of the display device according to claim 3, wherein a plurality of the moving parts are formed along the edge of the transparent electrode at a predetermined interval. The panel of claim 1, wherein a vacant space exists between the driver of the driving substrate and the microlens. The panel of the display device according to claim 1, wherein the color microlenses are formed on a transparent substrate. The panel of claim 6, wherein the color microlenses are formed on both sides of the transparent substrate. The panel of claim 1, wherein the spacing means is formed between a boundary point of the microlenses of the driving substrate and a boundary point of the color microlenses of the color filter substrate. The display device according to claim 8, wherein the interval maintaining means is formed between a boundary point of the microlenses of the driving substrate and a boundary point of the color microlenses of the color filter substrate and is formed along an edge of the driving substrate The panel of the device. The panel of claim 8, wherein the spacing means is formed along an edge of the driving substrate. 11. The panel of the display device according to any one of claims 8 to 10, wherein the interval maintaining means is a spacer. The panel according to any one of claims 8 to 10, wherein the interval maintaining means is a resin. The panel of claim 1, wherein the microlenses of the driving unit are made of a light-transmitting material. 14. The panel of claim 13, wherein the microlenses are made of any one of ITO, MgO, and PVA (polyvinyl alcohol). The panel of claim 1, wherein an empty space exists between the driving substrate and the color filter substrate. A step of forming a driving part having a switching element and a light-transmitting electrode of each unit pixel on a light-transmissive substrate; a step of forming a moving part that varies in length on the driving part; and a step of forming microlenses A step of forming a driving substrate, Forming a color filter substrate having color microlenses corresponding to the microlenses of the driving substrate; And a step of holding and fixing the drive substrate and the color filter substrate at a predetermined interval through the gap maintaining means. 17. The method of claim 16, wherein forming the motion portion comprises: forming a metal layer on the driving portion; etching the metal layer in the region for the motion portion; And forming a layer of a transparent conductive film on the transparent substrate. 18. The method of claim 17, wherein forming the layer of the predetermined material comprises: forming a layer of the predetermined material on the entire surface of the metal layer; and etching the layer of the predetermined material on the upper surface of the metal layer Wherein the first electrode and the second electrode are electrically connected to each other. 17. The panel of claim 16, wherein the moving part is formed of a piezoelectric material. 20. The panel of claim 19, wherein the moving part is formed of a piezoelectric material of PZT. 17. The method of claim 16, wherein forming the microlenses of the driving substrate comprises: forming a layer of a material for the microlens on the upper surface of the driving unit including the motion unit; And forming the microlenses by etching the film to form the microlenses. 22. The method of claim 21, wherein the microlens-shaped film is anisotropically etched. The method according to claim 21, wherein the microlens-shaped film is formed of a photosensitive film. 17. The method according to claim 16, wherein the microlenses of the driving substrate are formed of a light-transmitting metal layer. The method according to claim 24, wherein the microlenses are formed of any one of ITO and MgO. The method of claim 17 or 18, further comprising removing all of the etched metal layer. The method according to claim 16, wherein the step of fabricating the color filter substrate comprises the steps of: forming the color microlenses on both surfaces of the substrate; forming a bluel matrix for separating the color microlenses from the surface of the transparent substrate opposite to the driving substrate; And a step of forming a plurality of pixel electrodes on the substrate. The panel manufacturing method according to claim 27, wherein the color microlenses are formed on a transparent substrate. 28. The method according to claim 27, wherein the interval maintaining means is formed at a boundary point between microlenses of the driving substrate and a boundary point of the color microlenses. 28. The method as claimed in claim 27, wherein the interval maintaining means is formed at a boundary point of microlenses of the driving substrate and a boundary point of the color microlenses.