CN101576680B - Liquid crystal display device and assembly method thereof - Google Patents

Abstract

The invention provides a liquid crystal display device and an assembling method thereof. The assembling method of the liquid crystal display device of the invention at least comprises the following steps: providing a backlight module; and arranging the liquid crystal display module on the backlight module, wherein the assembling method of the liquid crystal display module at least comprises the following steps: providing a first substrate; forming a liquid crystal layer on the first substrate; forming a light splitting layer on the liquid crystal layer; and arranging a second substrate on the light splitting layer.

Description

Liquid crystal display device and assembly method thereof

technical field

The present invention relates to a liquid crystal display device and its assembly method, and in particular to a liquid crystal display device capable of displaying images in different directions and its assembly method.

Background technique

With the continuous innovation of the information and communication industries, the liquid crystal display (Liquid Crystal Display; LCD) market is booming. Liquid crystal displays have the advantages of high image quality, small size, light weight, low driving voltage, and low power consumption, so they are widely used in personal digital assistants (Personal Digital Assistant; PDA), mobile phones, camcorders, notebooks, etc. Consumer communication or electronic products such as computers, desktop monitors, car monitors, and projection TVs. Coupled with the rapid development of integrated circuit (Integrated Circuit; IC) industry and liquid crystal display manufacturing technology, these consumer communication or electronic products are also developing towards the trend of light, thin, short and small. Especially in terms of computer products, in addition to high-performance, high-speed desktop computers, portable notebook computers have received great attention and attention.

In general liquid crystal display devices, the light emitting direction of the backlight source is mostly fixed, and the distribution of the light type (light emitting angle) is maintained in a certain range, so general liquid crystal display devices can only be viewed within a specific viewing angle range. . Taking car panels as an example, the automotive industry has gradually improved in-car entertainment functions, and car navigation systems and DVD audio-visual systems have become the basic equipment in many cars. However, when the car navigation system and the DVD audio-visual system are used at the same time, two display devices need to be installed in the car, thus increasing the installation cost and reducing the configuration space in the car.

Please refer to FIG. 1 , which shows a schematic structural diagram of a conventional liquid crystal display device. The known liquid crystal display device uses a "parallax barrier" method to display images in two directions at the same time, so as to achieve the dual view (Dual View) simultaneous display effect. It is set on the liquid crystal display module 920 through a color filter (Color Filter) 910 with a barrier photomask to separate the light of different images from emitting in two directions, so that it can be viewed from two directions at the same time Images A and B.

However, the process of the color filter 910 with the barrier photomask is complicated and difficult, thus increasing the process cost and difficulty of realizing Dual View. Moreover, the color filter 910 separates the light by shielding the light, thus reducing the utilization rate of light energy of the liquid crystal display device.

Contents of the invention

Therefore, one aspect of the present invention is to provide a liquid crystal display device for displaying images in different directions, thereby achieving the effect of dual viewing angle display.

Another aspect of the present invention is to provide an assembly method of a liquid crystal display device, so as to simplify the assembly method or process of the liquid crystal display device with dual viewing angle display functions.

Another aspect of the present invention is to provide a liquid crystal display device, so as to improve the utilization rate of light energy of the liquid crystal display device.

According to an embodiment of the present invention, the liquid crystal display device of the present invention at least includes a backlight module and a liquid crystal display module. The liquid crystal display module is arranged on the backlight module, wherein the liquid crystal display module at least includes a first substrate, a liquid crystal layer, a light splitting layer and a second substrate. The liquid crystal layer is arranged on the first substrate, and the light-splitting layer is arranged on the liquid crystal layer, wherein the light-splitting layer is provided with a first light-transmitting medium and a second light-transmitting medium, and the light refractive index of the first light-transmitting medium is substantially different from that of the first light-transmitting medium. 2. The light refractive index of the light-transmitting medium. The second substrate is arranged on the light splitting layer.

Moreover, according to an embodiment of the present invention, a plurality of interfaces are formed between the first light-transmitting medium and the second light-transmitting medium of the above-mentioned liquid crystal display device, and each of these interfaces has a preset angle to the incident light , wherein the incident light is incident from the first transparent medium to the second transparent medium.

Furthermore, according to an embodiment of the present invention, the method for assembling a liquid crystal display device of the present invention at least includes: providing a backlight module; and disposing the liquid crystal display module on the backlight module, wherein the method for assembling the liquid crystal display module at least includes: providing a first substrate; forming a liquid crystal layer on the first substrate; providing a second substrate; forming a light-splitting layer on the second substrate, wherein the light-splitting layer has a first light-transmitting medium and a second light-transmitting medium, and this forms the light-splitting layer The steps are to firstly form the second light-transmitting medium on the second substrate, then form the first light-transmitting medium on the second light-transmitting medium, and then perform a scraping step on the first light-transmitting medium to form a light-splitting layer, and The light refractive index of the first light-transmitting medium is substantially different from that of the second light-transmitting medium; and the second substrate and the light-splitting layer are arranged on the liquid crystal layer, wherein the light-splitting layer is opposite to the liquid crystal layer.

Therefore, the liquid crystal display device of the present invention can display different images in different directions at the same time, and the assembly method of the liquid crystal display device of the present invention is relatively simple. In addition, the liquid crystal display device of the present invention can avoid the problem of poor utilization of light energy.

Description of drawings

In order to make the above and other objects, features, advantages and embodiments of the present invention more comprehensible, the detailed description of the accompanying drawings is as follows:

FIG. 1 is a schematic diagram illustrating the structure of a conventional liquid crystal display device.

FIG. 2 is a schematic cross-sectional view illustrating a liquid crystal display device according to a first embodiment of the present invention.

FIG. 3 is a schematic partial cross-sectional view of a liquid crystal display device according to a first embodiment of the present invention.

FIG. 4 is a partial cross-sectional schematic diagram illustrating a liquid crystal display device according to a second embodiment of the present invention.

FIG. 5 is a schematic cross-sectional view illustrating a liquid crystal display device according to a third embodiment of the present invention.

[Description of main component symbols]

I: interface P, P': pixel θ, θ': preset angle

n ₁ , n ₂ : Refractive index of light 100: Liquid crystal display module

110: first polarizer 120: first substrate

130: liquid crystal layer 140: light splitting layer

141: the first light-transmitting medium

142: Second light-transmitting medium 150: Color filter

151: Color block 160: Second substrate

170: second polarizer

200: Backlight module 210: Optical film set

340: light-splitting layer 341: first light-transmitting medium

342: Second light-transmitting medium 450: Color filter

910: Color filter 920: LCD module

Detailed ways

In order to make the above and other objects, features, advantages and embodiments of the present invention more comprehensible, this specification will specifically cite a series of embodiments for illustration. However, it should be noted that these examples are only used to illustrate the implementation of the present invention, not to limit the present invention.

Please refer to FIG. 2 , which is a schematic cross-sectional view of a liquid crystal display device according to a first embodiment of the present invention. The liquid crystal display device of this embodiment includes a liquid crystal display module 100 and a backlight module 200 . The liquid crystal display module 100 is disposed above a backlight module 200 . The backlight module 200 can be an edge-light (Edge Lighting) backlight module or a direct-down type incident light (Bottom Lighting) backlight module, wherein the backlight module 200 can preferably provide a highly collimated backlight source, such as an optical The diaphragm group 210 is used to improve backlight efficiency and collimation. The optical film set 210 can be, for example, a diffusion sheet, a prism sheet, a Brightness Enhancement Film (BEF), a reflective Brightness Enhancement Film (Dual Brightness Enhancement Film; DBEF), a non-multilayer film type reflective polarizer (Diffused ReflectivePolarizer) Film; DRPF) or any combination of the above. The light sources (not shown) of the backlight module 200 are, for example, cold cathode fluorescent lamps (Cold Cathode Fluorescent Lamp; CCFL), hot cathode fluorescent lamps (Hot Cathode Fluorescent Lamp; HCFL), light-emitting diodes (Light- Emitting Diode (LED), Organic Light Emitting Diode (OLED) or Electro-Luminescence (EL), are used to provide backlight to the liquid crystal display module 100 .

As shown in Figure 2, the liquid crystal display module 100 of this embodiment includes a first polarizer 110, a first substrate 120, a liquid crystal layer 130, a light splitting layer 140, a color filter 150, a second substrate 160 and a second polarizer The slices 170 are stacked sequentially. When the light is vertically incident on the light-splitting layer 140 of the liquid crystal display module 100, the light can pass through the light-splitting layer 140 to exit in different directions, so that the effect of dual view can be achieved, that is, it can be directed in different directions at the same time to display different images.

As shown in FIG. 2 , the first polarizer 110 of this embodiment is used to allow part of the light in the polarization direction emitted by the backlight module 200 to pass through, so that the light is polarized. The first substrate 120 of this embodiment is arranged on the first polarizer 110, so that the polarized light is incident on the liquid crystal layer 130, the first substrate 120 is, for example, a glass substrate or a flexible substrate, wherein the first The substrate 120 may be provided with a plurality of driving elements (not shown), such as thin-film transistors (Thin-Film Transistor; TFT), to drive the twisting of the liquid crystal molecules (not shown) in the liquid crystal layer 130, so that in the liquid crystal layer 130 A plurality of pixels P are formed in. It should be noted that these driving elements can be disposed on the first substrate 120 or the second substrate 160 , rather than being limited to the first substrate 120 .

As shown in FIG. 2 , the liquid crystal layer 130 of this embodiment is arranged on the first substrate 120 , so that the light is affected by the twisted alignment of the liquid crystal molecules to produce different polarization states, and then passes through the second substrate 160 and the second substrate 160 . The function of the polarizer 170 is to control the light and shade display effect of these pixels P to display various graphics and images. The liquid crystal molecules in the liquid crystal layer 130 can be, for example, vertical alignment (Vertical Alignment) liquid crystals, twisted nematic (Twist Nematic) liquid crystals or parallel alignment liquid crystals.

Please refer to FIG. 3 , which is a schematic partial cross-sectional view of a liquid crystal display device according to a first embodiment of the present invention. The light-splitting layer 140 of this embodiment is disposed between the liquid crystal layer 130 and the second substrate 160 to make the light passing through the liquid crystal layer 130 emit in different directions to achieve the effect of double viewing angles. The light-splitting layer 140 is provided with a first light-transmitting medium 141 and a second light-transmitting medium 142, and the optical refractive index _n1 of the first light-transmitting medium 141 is substantially different from the optical refractive index _n2 of the second light-transmitting medium 142, preferably The light refractive index n ₁ is greater than the light refractive index n ₂ , and there is a preset angle θ between the interface I formed between the first light-transmitting medium 141 and the second light-transmitting medium 142 and the vertically incident light, so that when the light passes through When the first light-transmitting medium 141 enters the second light-transmitting medium 142 , the light can be deflected and then emitted toward a predetermined direction.

In this embodiment, the first light-transmitting medium 141 can form a plurality of triangular structures, which are periodically arranged between the liquid crystal layer 130 and the second substrate 160, and the second light-transmitting medium 142 can form a plurality of inverted triangle structures. , are formed in close contact on the first light-transmitting medium 141 , so the light-splitting layer 140 of this embodiment can have a plurality of interfaces I with opposite slopes, so as to allow light to emit in different directions. The slopes of the interface I on every two adjacent pixels P and P' are opposite, so that the light rays emitted by every two adjacent pixels P and P' are emitted in opposite directions.

For example, when the refractive index n ₁ of the first transparent medium 141 is 1.6, and the refractive index n ₂ of the second transparent medium 142 is 1.4, and the preset angle θ is +61 degrees, and the preset angle When θ' is -61 degrees, the light rays emitted by every two adjacent pixels P and P' are emitted in opposite directions, and emit light at +40 degrees and -40 degrees respectively.

As shown in FIG. 2 , the color filter 150 of this embodiment is arranged between the light splitting layer 140 and the second substrate 160, and the second polarizer 170 is arranged on the second substrate, so that the color filter formed by the light splitting layer 140 The separated light can be emitted by the second polarizer 170 to form a dual-view display effect. Wherein the color filter 150 is made up of a plurality of color blocks 151 arranged, for example, is arranged by a plurality of red blocks (R), a plurality of green blocks (G) and a plurality of blue blocks (B) Composition, and each of these color blocks 151 is corresponding to a single pixel P, the arrangement of these color blocks 151 can be, for example: R-G-B-R-G-B or R-R-G-G-B-B, so as to display color changes in different directions at the same time. However, the arrangement of the color blocks 151 in this embodiment is not limited to the above, and those skilled in the art can choose any appropriate arrangement to achieve the same effect, but the liquid crystal display module does not depart from the application scope of this invention.

Therefore, when the liquid crystal display device of this embodiment is displaying, the backlight module 200 can provide a backlight source to the liquid crystal display module 100, and the light can be emitted in different directions through the light splitting layer 140 of the liquid crystal display module 100, so that Simultaneously display images and pictures in different directions to achieve the effect of dual-view display. In addition, the liquid crystal display device of this embodiment can make full use of the backlight source for displaying, so as to avoid the problem of lower light energy utilization rate in conventional liquid crystal display devices.

When assembling the liquid crystal display device 100 of this embodiment, firstly, a backlight module 200 is provided. Next, the liquid crystal display module 100 is disposed on the backlight module 200 , thus forming the liquid crystal display device 100 . The first polarizer 110, the first substrate 120, the liquid crystal layer 130, the light splitting layer 140, the color filter 150, the second substrate 160 and the second polarizer 170 of the liquid crystal display module 100 are stacked and assembled in sequence. . The light splitting layer 140 is first formed on the second substrate 160 , and then the light splitting layer 140 and the second substrate 160 are disposed on the liquid crystal layer 130 , and the light splitting layer 140 is opposite to the liquid crystal layer 130 . When forming the light-splitting layer 140, the light-splitting layer 140 first forms the second light-transmitting medium 142 on the second substrate 160, and then forms the first light-transmitting medium 141 on the second light-transmitting medium 142, and then forms the first light-transmitting medium 142 on the second light-transmitting medium 142. The medium 141 undergoes a scraping step, thereby forming the light-splitting layer 140 . Therefore, the method for assembling the liquid crystal display device of this embodiment can easily and accurately form the light splitting layer 140 and assemble it in the liquid crystal display device, thus simplifying the assembly method or process.

Please refer to FIG. 4 , which shows a schematic partial cross-sectional view of a liquid crystal display device according to a second embodiment of the present invention. Only the differences between this embodiment and the first embodiment will be described below, and the similarities will not be repeated here. Compared with the first embodiment, the first light-transmitting medium 341 of the light-splitting layer 340 of the second embodiment can form a plurality of right-angled triangular structures (or wedge-shaped structures), which are arranged periodically, and each of these Several right-angled triangle structures of the first transparent medium 341 are arranged on some pixels P, and the second transparent medium 342 can form multiple inverted right-angled on the optical medium 341. The slopes of the interface I on every two adjacent pixels P and P' are opposite, so that the light rays emitted by every two adjacent pixels P and P' are emitted in opposite directions. Therefore, the thickness of the light-splitting layer 340 of the second embodiment can be further reduced while having the light-splitting effect, thereby reducing the overall thickness of the liquid crystal display device 100 .

Please refer to FIG. 5 , which is a schematic cross-sectional view of a liquid crystal display device according to a third embodiment of the present invention. Only the differences between this embodiment and the first embodiment will be described below, and the similarities will not be repeated here. Compared with the first embodiment, the color filter 450 of the third embodiment is arranged between the liquid crystal layer 130 and the light-splitting layer 140, that is, the light first passes through the color filter 450 to form colored light, and then passes through the light-splitting layer 140 To carry out the light splitting action, so that the light is emitted in different directions, thus achieving the effect of dual viewing angle display.

From the above embodiments of the present invention, it can be seen that the liquid crystal display device of the present invention can display images and pictures in different directions, achieving the effect of dual viewing angle display, and the assembly method of the liquid crystal display device of the present invention is relatively simple. In addition, the liquid crystal display device of the present invention can avoid the problem of poor utilization of light energy in conventional Dual View display devices.

Although the present invention has been disclosed above with the embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection shall prevail as defined by the appended claims.

Claims (10)

1. liquid crystal indicator comprises at least:

One backlight module; And

One liquid crystal display module is arranged on this backlight module, and wherein this liquid crystal display module comprises at least:

One first substrate;

One second substrate is oppositely arranged with this first substrate;

One liquid crystal layer is arranged between this first substrate and this second substrate; And

One beam splitter layer, be arranged between this liquid crystal layer and this second substrate, wherein this beam splitter layer is provided with one first light transmission medium and one second light transmission medium, and the optical index of this first light transmission medium is different from the optical index of this second light transmission medium, be formed with a plurality of interfaces between this first light transmission medium and this second light transmission medium, and having a predetermined angle between the light of each described interface and perpendicular to this first substrate incident, this incident ray is to be incident to this second light transmission medium by this first light transmission medium.

2. liquid crystal indicator as claimed in claim 1 wherein also comprises at least:

One colored filter is arranged between this beam splitter layer and this second substrate.

3. liquid crystal indicator as claimed in claim 1 wherein also comprises at least:

One colored filter is arranged between this liquid crystal layer and this beam splitter layer.

4. liquid crystal indicator as claimed in claim 1, wherein the optical index of this first light transmission medium is greater than the optical index of this second light transmission medium.

5. liquid crystal indicator as claimed in claim 1, wherein the slope at every two adjacent described interfaces is opposite.

6. liquid crystal indicator as claimed in claim 1, wherein this first light transmission medium has a plurality of triangular structures, and this second light transmission medium has a plurality of del structures, and driving fit be formed on this first light transmission medium.

7. liquid crystal indicator as claimed in claim 1, wherein this first light transmission medium has a plurality of triangular structure of right angle, and this second light transmission medium has a plurality of chamfer triangular structures, and driving fit be formed on this first light transmission medium.

8. the assemble method of a liquid crystal indicator comprises at least:

One backlight module is provided; And

One liquid crystal display module is set on this backlight module, wherein the assemble method of this liquid crystal display module comprises at least:

One first substrate is provided;

Form a liquid crystal layer on this first substrate;

One second substrate is provided;

form a beam splitter layer on this second substrate, wherein this beam splitter layer has one first light transmission medium and one second light transmission medium, and the step of this this beam splitter layer of formation is first to form this second light transmission medium on this second substrate, form again this first light transmission medium on this second light transmission medium, and being essence, the optical index of this first light transmission medium is different from the optical index of this second light transmission medium, be formed with a plurality of interfaces between this first light transmission medium and this second light transmission medium, and has a predetermined angle between the light of each described interface and perpendicular to this first substrate incident, this incident ray is to be incident to this second light transmission medium by this first light transmission medium, and

This second substrate and this beam splitter layer are set on this liquid crystal layer, wherein this beam splitter layer is with respect to this liquid crystal layer.

9. the assemble method of liquid crystal indicator as claimed in claim 8 wherein also comprises at least:

One colored filter is set between this beam splitter layer and this second substrate.

10. the assemble method of liquid crystal indicator as claimed in claim 8 wherein also comprises at least:

One colored filter is set between this liquid crystal layer and this beam splitter layer.

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