CN100447647C - Guest-host LCD panel - Google Patents

Abstract

A guest-host liquid crystal display panel comprises a first substrate, a display medium accommodating layer, a display medium and a second substrate. The first substrate is provided with a first patterned electrode layer, the display medium accommodating layer is arranged on the first patterned electrode layer of the first substrate, and the display medium accommodating layer is provided with a plurality of grooves positioned above the first patterned electrode layer. The display medium is disposed in the groove of the display medium accommodating layer, and the display medium includes liquid crystal molecules and dichromatic dye doped in the liquid crystal molecules. In addition, the second substrate is arranged on the display medium accommodating layer and the display medium, and the second substrate is provided with a second patterned electrode layer. The guest-host LCD panel can be applied in flexible display without using any polarizer or retarder.

Description

Guest-host LCD panel

technical field

The present invention relates to a guest-host type liquid crystal display panel (Guest-Host LCD panel), and in particular to a guest-host type liquid crystal display panel with a single-layer colorization structure.

Background technique

In order to meet the modern life style, the volume of video or image devices is becoming thinner and thinner. Although the traditional cathode ray tube (cathode ray tube, CRT) display still has its advantages, due to the structure of its internal electronic cavity, the cathode ray The size of the tube display is large and takes up space, and the output image of the cathode ray tube display will produce radiation to damage the eyes. Therefore, flat panel displays (FPDs), such as liquid crystal displays, developed in conjunction with optoelectronic technology and semiconductor manufacturing technology, have gradually become the mainstream of display products. Common liquid crystal displays include twisted nematic liquid crystal display (TN-LCD), super twisted nematic liquid crystal display (STN-LCD), thin film transistor liquid crystal display (TFT-LCD) and guest-host liquid crystal display (GH-LCD) etc., and these liquid crystal displays in different forms have been gradually applied in different products. The guest-host type liquid crystal display panel will be described below.

FIG. 1 is a schematic cross-sectional view of a known guest-host type liquid crystal display panel. Please refer to FIG. 1 , a known guest-host liquid crystal display panel 100 includes a substrate 110, an active matrix substrate (active matrix substrate) 120, an active matrix substrate 130, an active matrix substrate 140, a yellow guest-host liquid crystal layer 150Y, a turquoise guest-host A liquid crystal 150C and a magenta guest-host type liquid crystal layer 150M. Among them, the substrate 110 has a reflective electrode 112, the active array substrate 120 has a plurality of thin film transistors 122, a plurality of pixel electrodes 124 and an electrode layer 126, and the active array substrate 130 has a plurality of thin film transistors 132, a plurality of pixel electrodes 134 and the electrode layer 136 , and the active array substrate 140 has a plurality of thin film transistors 142 and a plurality of pixel electrodes 144 .

As mentioned above, the yellow guest-host liquid crystal layer 150Y is disposed between the substrate 110 and the active array substrate 120, and the yellow guest-host liquid crystal layer 150Y is controlled by the voltage difference between the pixel electrode 124 and the reflective electrode 112; The guest-host liquid crystal 150C is arranged between the active array substrate 120 and the active array substrate 130, and the turquoise guest-host liquid crystal 150C is controlled by the voltage difference between the pixel electrode 134 and the electrode layer 126; while the magenta guest-host liquid crystal layer 150M It is disposed between the active array substrate 130 and the active array substrate 140 , and the magenta guest-host liquid crystal layer 150M is controlled by the voltage difference between the pixel electrode 144 and the electrode layer 136 .

It can be seen from FIG. 1 that the guest-host type liquid crystal display panel 100 belongs to a three-layer liquid crystal display panel. Specifically, the guest-host type liquid crystal display panel 100 needs to use four substrates to standardize three spaces to accommodate the yellow guest-host type liquid crystal layer 150Y. , a cyan guest-host liquid crystal layer 150C, and a magenta guest-host liquid crystal layer 150M. Therefore, the thickness, weight and cost of the guest-host liquid crystal display panel 100 cannot be greatly reduced. In addition, the production of the guest-host type liquid crystal display panel 100 is relatively cumbersome, which easily leads to a decrease in yield.

FIG. 2 is a schematic cross-sectional view of another known guest-host type liquid crystal display panel. Please refer to FIG. 2 , a known guest-host type liquid crystal display panel 200 includes a substrate 210, a pixel electrode 220a, a pixel electrode 220b, a pixel electrode 220c, a polymer material layer 230a, a polymer material layer 230b, a polymer material layer 230c, and a guest-host liquid crystal display panel. 240C, guest-host type liquid crystal 240M, guest-host type liquid crystal 240Y, common electrode 250 and hard coating (hard coating) 260 . The pixel electrode 220a is disposed on the substrate 210, the polymer material layer 230a covers the substrate 210 and the pixel electrode 220a, and the guest-host liquid crystal 240C is distributed in the polymer material layer 230a. The pixel electrode 220b is disposed on the polymer material layer 230a, the polymer material layer 230b covers the polymer material layer 230a and the pixel electrode 220b, and the guest-host liquid crystal 240M is distributed in the polymer material layer 230b. The pixel electrode 220c is disposed on the polymer material layer 230b, the polymer material layer 230c covers the polymer material layer 230b and the pixel electrode 220c, and the guest-host liquid crystal 240Y is distributed in the polymer material layer 230c. In addition, the common electrode 250 covers the polymer material layer 230c, and the hard coating 260 covers the common electrode 250 .

As shown in FIG. 2 , although the guest-host type liquid crystal display panel 200 belongs to a three-layer structure liquid crystal display panel, it only uses one substrate, so the guest-host type liquid crystal display panel 200 has been slightly reduced in thickness, weight and cost. However, it is worth noting that since the above-mentioned guest-host type liquid crystal display panels 100 and 200 are liquid crystal display panels with a three-layer structure, and the guest-host type liquid crystal display panel 100 is prone to double image problems, and this phenomenon is One of the problems to be solved urgently for the guest-host type liquid crystal display panel.

Contents of the invention

The object of the present invention is to provide a guest-host liquid crystal display panel with a single-layer structure, which does not need to use any polarizer or retarder, so it can effectively increase brightness and reduce cost.

To achieve the above or other objectives, the present invention provides a guest-host liquid crystal display panel, which includes a first substrate, a display medium containing layer, a display medium, and a second substrate. Wherein, the first substrate has a first patterned electrode layer, and the display medium accommodating layer is arranged on the first patterned electrode layer of the first substrate, and the display medium accommodating layer has a plurality of the groove. The display medium is arranged in the groove of the display medium accommodating layer, and the display medium includes liquid crystal molecules and dichroic dyes doped in the liquid crystal molecules. In addition, the second substrate is disposed on the display medium accommodating layer and the display medium, and the second substrate has a second patterned electrode layer.

In one embodiment of the present invention, the first patterned electrode layer on the first substrate includes a plurality of pixel electrodes, and the second patterned electrode layer on the second substrate is a common electrode. In another embodiment of the present invention, the first patterned electrode layer includes a plurality of first strip electrodes, and the second patterned electrode layer includes a plurality of second strip electrodes.

In an embodiment of the present invention, the material of the display medium accommodating layer may be a transparent dielectric material or a dielectric material with reflective effect.

In an embodiment of the present invention, the guest-host type liquid crystal display panel may further include a plurality of color filter layers, and these color filter layers are respectively disposed in the grooves of the display medium accommodating layer. For example, the color filter layer can be disposed on the display medium, of course, the color filter layer can also be disposed under the display medium.

In one embodiment of the present invention, the color filter layer includes a plurality of first color filter layers, a plurality of second color filter layers and a plurality of third color filter layers, wherein the first color filter layer, the second color filter layer The second color filter layer and the third color filter layer are suitable for matching with the display medium to shield light (dark state).

In one embodiment of the invention, the display medium may be in the form of a capsule.

In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments are specifically cited below and described in detail with accompanying drawings.

Description of drawings

FIG. 1 is a schematic cross-sectional view of a known guest-host type liquid crystal display panel.

FIG. 2 is a schematic cross-sectional view of another known guest-host type liquid crystal display panel.

3 is a schematic cross-sectional view of a guest-host type liquid crystal display panel according to a first embodiment of the present invention.

4 is a schematic cross-sectional view of a guest-host type liquid crystal display panel according to a second embodiment of the present invention.

5 is a schematic cross-sectional view of a guest-host type liquid crystal display panel according to a third embodiment of the present invention.

6 is a schematic cross-sectional view of a guest-host type liquid crystal display panel according to a fourth embodiment of the present invention.

Description of main component marking

100, 200, 300, 400, 500, 600, 700: guest-host type LCD panel

110, 210: Substrate

112: reflective electrode

120, 130, 140: active array substrate

122, 132, 142: thin film transistors

124, 134, 144, 220a, 220b, 220c: pixel electrodes

126, 136: electrode layer

150Y, 150M, 150C: guest-host type liquid crystal layer

230a, 230b, 230c: polymer material layer

240Y, 240M, 240C: guest-host LCD

250: common electrode

260: hard coating

310: first substrate

312: the first patterned electrode layer

312': pixel electrode

312″: strip electrodes

320: Display the media containment layer

322: Groove

330: display media

332: liquid crystal molecules

334: dichroic dye

340: second substrate

342: second patterned electrode layer

342': common electrode

342″: strip electrodes

350: color filter layer

350R: Red color filter layer

350G: Green color filter layer

350B: Blue color filter layer

L1: light

R: red light

G: green light

B: Blu-ray

Detailed ways

first embodiment

3 is a schematic cross-sectional view of a guest-host type liquid crystal display panel according to a first embodiment of the present invention. Referring to FIG. 3 , the guest-host type liquid crystal display panel 300 of this embodiment includes a first substrate 310 , a display medium containing layer 320 , a display medium 330 , a second substrate 340 and a plurality of color filter layers 350 . Wherein, the first substrate 310 has a first patterned electrode layer 312, and the display medium accommodating layer 320 is disposed on the first patterned electrode layer 312 of the first substrate 310, and the display medium accommodating layer 320 has a plurality of A groove 322 above the patterned electrode layer 312 . The display medium 330 is disposed in the groove 322 of the display medium accommodating layer 320 , and the display medium 330 includes liquid crystal molecules 332 and dichroic dyes 334 doped in the liquid crystal molecules 332 . In addition, the second substrate 340 is disposed on the display medium containing layer 320 and the display medium 330 , and the second substrate 340 has a second patterned electrode layer 342 .

In this embodiment, the material of the display medium accommodating layer 320 is, for example, a dielectric material with reflective effect. Of course, the display medium accommodating layer 320 may also be made of a transparent dielectric material. If the material of the display medium accommodating layer 320 is a reflective material, the guest-host type liquid crystal display panel 300 belongs to a reflective LCD panel (reflective LCD panel); otherwise, if the material of the display medium accommodating layer 320 is a transparent material, The guest-host type LCD panel 300 belongs to a transmissive LCD panel. Of course, the display medium accommodating layer 320 can also be made by combining reflective materials and transparent materials, so that the guest-host type LCD panel 300 becomes a transflective LCD panel.

In addition, the display medium 330 of this embodiment is, for example, in the shape of a capsule. Of course, the capsule-shaped display medium 330 is only used for illustration and is not intended to limit the form of the display medium 330 of the present invention. Others have liquid crystal molecules 332 and two-color The display medium 330 of the permanent dye 334 is suitable for the present invention.

It should be noted that the color filter layer 350 and the display medium 330 are disposed in the groove 322 of the display medium accommodating layer 320 at the same time, and the display medium 330 is located on the color filter layer 350 . In this embodiment, the color filter layer 350 includes a plurality of red color filter layers 350R, a plurality of green color filter layers 350G and a plurality of blue color filter layers 350B, wherein the red color filter layer 350R, the green color filter layer The filter layer 350G and the blue color filter layer 350B are adapted to cooperate with the display medium 330 to shield the light L1 (“OFF” state). Of course, in other embodiments, the color filter layer 350 may also be composed of color filter layers of other colors.

It can be seen from the upper left part of FIG. 3 that when the pixel in the guest-host type liquid crystal display panel 300 is in the “OFF” state, the light L1 incident on the pixel will be detected by the dichroic dye 334 in the display medium 330 and the red color filter layer 350R. , the green color filter layer 350G and the blue color filter layer 350B, so that the pixels display black. In addition, it can be seen from the upper right part of FIG. 3 that when the pixel in the guest-host type liquid crystal display panel 300 is in the "ON" state, the light L1 incident on the pixel will not be absorbed by the dichroic dye 334 in the display medium 330, After the light L1 passes through the red color filter layer 350R, the green color filter layer 350G and the blue color filter layer 350B, red light R, green light G or blue light B will appear.

second embodiment

4 is a schematic cross-sectional view of a guest-host type liquid crystal display panel according to a second embodiment of the present invention. Referring to FIG. 4 , the guest-host type liquid crystal display panel 400 of this embodiment is similar to the guest-host type liquid crystal display panel 400 of the first embodiment, but the main difference between the two lies in the relative positions of the color filter layer 350 and the display medium 330 . In this embodiment, the color filter layer 350 is located on the display medium 330 .

third embodiment

5 is a schematic cross-sectional view of a guest-host type liquid crystal display panel according to a third embodiment of the present invention. Please refer to FIG. 5. In the guest-host type liquid crystal display panel 500 of this embodiment, the first substrate 310 is an active array substrate with active elements 314 (such as thin film transistors) and pixel electrodes 312', and the second substrate 340 is an active array substrate with a common The counter substrate of the electrode 342'. The description of other components will not be repeated.

Fourth embodiment

6 is a schematic cross-sectional view of a guest-host type liquid crystal display panel according to a fourth embodiment of the present invention. Please refer to FIG. 6. In the guest-host type liquid crystal display panel 600 of this embodiment, the first substrate 310 is a passive matrix substrate with strip electrodes 312", and the second substrate 340 has strip electrodes 342". the opposite substrate. The description of other components will not be repeated.

In summary, the guest-host type liquid crystal display panel of the present invention has at least the following advantages:

1. The colored guest-host type liquid crystal display panel of the present invention belongs to a single-layer structure, so the thickness is thinner than the general colored guest-host type liquid crystal display panel, the weight is lighter than the general guest-host type liquid crystal display panel, and there is no double image (double image) phenomenon occurs.

2. Since the display mode of the guest-host type liquid crystal is less susceptible to the influence of thickness variation, the guest-host type liquid crystal display panel of the present invention can be used in a flexible display, and is suitable for a continuous process in manufacture.

3. The guest-host type liquid crystal display panel of the present invention is very simple to manufacture, which helps to improve the yield.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some modifications and improvements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be defined by the claims.

Claims (9)

1. guest-host type liquid crystal display panel is characterized in that comprising:

First substrate has first patterned electrode layer;

The ccontaining layer of display medium is arranged on above-mentioned first substrate and states on first patterned electrode layer, and the ccontaining layer of wherein above-mentioned display medium has a plurality of grooves that are positioned at the above-mentioned first patterned electrode layer top;

Display medium is arranged on the ccontaining layer of above-mentioned display medium and states in these grooves, and wherein above-mentioned display medium comprises:

Liquid crystal molecule;

The bitintability dyestuff is doped in the above-mentioned liquid crystal molecule;

A plurality of chromatic filter layers are arranged at respectively on the ccontaining layer of above-mentioned display medium and state in these grooves; And

Second substrate is arranged on ccontaining layer of above-mentioned display medium and the above-mentioned display medium, and wherein above-mentioned second substrate has second patterned electrode layer.

2. the guest-host type liquid crystal display panel according to claim 1 stated first patterned electrode layer on it is characterized in that on above-mentioned first substrate and comprised a plurality of pixel electrodes, is common electrode and state second patterned electrode layer on above-mentioned second substrate.

3. the guest-host type liquid crystal display panel according to claim 1 it is characterized in that above-mentioned first patterned electrode layer comprises a plurality of first strip shaped electric poles, and above-mentioned second patterned electrode layer comprises a plurality of second strip shaped electric poles.

4. the guest-host type liquid crystal display panel according to claim 1 is characterized in that the material of the ccontaining layer of above-mentioned display medium comprises dielectric material.

5. the guest-host type liquid crystal display panel according to claim 1 is characterized in that the material of the ccontaining layer of above-mentioned display medium comprises reflecting material.

6. the guest-host type liquid crystal display panel according to claim 1 is characterized in that above-mentioned these chromatic filter layers are arranged on the above-mentioned display medium.

7. the guest-host type liquid crystal display panel according to claim 1 is characterized in that above-mentioned display medium is arranged on above-mentioned these chromatic filter layers.

8. the guest-host type liquid crystal display panel according to claim 1 is characterized in that above-mentioned these chromatic filter layers comprise:

A plurality of first chromatic filter layers;

A plurality of second chromatic filter layers; And

A plurality of the 3rd chromatic filter layers, wherein above-mentioned these first chromatic filter layers, above-mentioned these second chromatic filter layers and above-mentioned these the 3rd chromatic filter layers are suitable for arranging in pairs or groups with shield lights with above-mentioned display medium.

9. the guest-host type liquid crystal display panel according to claim 1 is characterized in that above-mentioned display medium is capsule shape.

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