CN102707473A - Liquid crystal panel and liquid crystal display - Google Patents

Abstract

The invention provides a liquid crystal panel and a liquid crystal display. In order to solve the problem that the liquid crystal display in the prior art cannot provide a mirror function, the liquid crystal panel includes an upper substrate and a lower substrate arranged opposite to each other, and transparent electrodes are respectively arranged on the two substrates. layer, a negative cholesteric liquid crystal layer added with chiral ionic liquid is arranged between the upper substrate and the lower substrate, and the two transparent electrode layers communicate with a controllable switch state that can make the negative cholesteric liquid crystal reflective. power connection. With this solution, when normal display is required, the liquid crystal panel is connected to the AC signal that can realize normal display; when the liquid crystal panel is required to realize the mirror function, the signal is switched to a controllable switch state that can add chiral ionic liquid Negative cholesteric AC power that is reflective to liquid crystals. Thus, the function of the mirror is added to the liquid crystal panel.

Description

Liquid crystal panel and liquid crystal display

technical field

The invention relates to the field of liquid crystal displays, in particular to a liquid crystal panel and a liquid crystal display.

Background technique

A liquid crystal display is an ultra-thin display device, which includes two substrates arranged opposite to each other, and a liquid crystal is arranged between the two substrates. Liquid crystal displays are favored because they consume less power and are suitable for electronic devices that run on batteries.

With the development of technology, people's requirements for liquid crystal displays have also become diversified, and there are more and more demands for auxiliary functions of small displays such as mobile phones. The inventor finds that there is no mobile phone display with a mirror function in the prior art.

Contents of the invention

The invention provides a liquid crystal panel and a liquid crystal display, which can realize the display function of the liquid crystal panel and realize the mirror function when not displaying. The liquid crystal panel is characterized in that it includes an upper substrate and a lower substrate opposite to each other, transparent electrode layers are respectively arranged on the two substrates, and a negative cholesteric liquid crystal added with a chiral ionic liquid is arranged between the upper substrate and the lower substrate. layer, and the two transparent electrode layers are connected to an AC power source with a controllable switch state that can make the negative cholesteric liquid crystal reflective.

Further, the two transparent electrode layers are also connected to a DC power supply.

Further, a color filter is arranged on the side of the lower substrate close to the liquid crystal layer.

Further, the transparent electrode layer on the lower substrate is arranged on the color filter.

Further, a reflective layer is disposed on the side of the lower substrate close to the liquid crystal layer, and a color filter is disposed on the reflective layer.

Further, the liquid crystal panel further includes a light source, and the light source is disposed on a side surface of the upper substrate.

Further, a light guide plate matched with the light source is also arranged on the upper substrate.

An embodiment of the present invention also provides a liquid crystal display, including the aforementioned liquid crystal panel.

Due to the use of negative cholesteric liquid crystals added with chiral ionic liquids, at the same time, the transparent conductive layer in the liquid crystal panel has a controllable switch state, which can make the negative cholesteric liquid crystals added with chiral ionic liquids reflective. AC power supply, when normal display is required, the liquid crystal panel is connected to the AC signal that can realize normal display; when the liquid crystal panel is required to realize the mirror function, the signal is switched to a negative that has a controllable switch state and can add chiral ionic liquid Sexual cholesteric liquid crystals are in a reflective AC power supply. Thus, the function of the mirror is added to the liquid crystal panel.

Description of drawings

Fig. 1 shows the structure diagram of the liquid crystal panel provided by the embodiment of the present invention;

FIG. 2 shows a schematic diagram of the liquid crystal texture in the original state of the liquid crystal provided by the embodiment of the present invention;

Fig. 3 shows the schematic diagram of the liquid crystal focal conic texture provided by the embodiment of the present invention;

FIG. 4 shows a schematic diagram of a liquid crystal plane texture provided by an embodiment of the present invention;

FIG. 5 shows a structural diagram of a reflective liquid crystal panel provided by an embodiment of the present invention;

FIG. 6 shows a structure diagram of a reflective liquid crystal panel with an added light source provided by an embodiment of the present invention.

Detailed ways

In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

In the embodiment of the present invention, a chiral ionic liquid 5 is added to the negative cholesteric liquid crystal 6, and the movement of the chiral ionic liquid 5 and the texture change of the cholesteric liquid crystal are controlled by an electric field, thereby realizing transmission, scattering, and mirror surface controlled by an electric field. Reflect the three states to achieve the mirror effect.

As shown in Fig. 1, the liquid crystal panel provided by the first embodiment of the present invention includes an upper substrate 1 and a lower substrate 2, and transparent electrode layers 3 are respectively arranged on the two substrates, and a chiral ionic liquid 5 is added between the upper and lower substrates. The negative cholesteric liquid crystal 6 and the two transparent electrode layers 3 are connected to the AC power source 4 which has a controllable switch state and can make the negative cholesteric liquid crystal reflective. In order to realize the display function of the normal liquid crystal panel, the two transparent electrode layers are also connected to the AC signal that can realize the normal display. Generally, the AC signal with a lower frequency (100 to 200 Hz) is used, that is, the two transparent electrode layers are used for normal display. It is connected with an AC signal with a frequency of 100 to 200 Hz. When it is not necessary to display but needs to realize the mirror function, the two transparent electrode layers and the negative cholesteric liquid crystal with a controllable switch state that can make chiral ionic liquid appear The reflective AC power supply 4 is connected (generally using an AC signal with a frequency greater than 8000 Hz), and the function of the mirror is realized in this way.

Due to the use of the negative cholesteric liquid crystal 6 added to the chiral ionic liquid 5, the transparent conductive layer in the liquid crystal panel and the controllable switch state can be made to reflect the negative cholesteric liquid crystal added to the chiral ionic liquid. Under the AC power of lower frequency (100 Hz to 200 Hz), normal image display can be realized, and under the action of AC power of higher frequency (above 8000 Hz), the chiral ionic liquid 5 The distribution is concentrated on the electrode side, and the pitch gradient distribution of the negative cholesteric liquid crystal 6 appears, thereby displaying a mirror reflection state and realizing the effect of a mirror.

Of course, in order to quickly present the specular reflection state, the transparent electrode layer can also be connected to a DC power supply. By increasing the DC power supply, the liquid crystal panel can change into three states of transmission, scattering, and specular reflection. In this case, the liquid crystal molecules The reaction rate is faster than going directly from the transmissive state to the specular reflective state.

The original state of the negative cholesteric liquid crystal 6 added with the chiral ionic liquid 5 is shown in FIG. 2 when no electricity is applied, showing a transmissive state. Under the action of a DC electric field, the chiral ionic liquid 5 migrates to the electrode, while the negative cholesteric liquid crystal presents a focal conic texture, as shown in FIG. 3 , presenting a scattering state. After the scattering state is switched to a high-frequency (above 8000 Hz) AC voltage, the negative cholesteric liquid crystal 6 switches from the focal conic texture to the planar texture as shown in Figure 4, because the distribution of the chiral ionic liquid 5 is concentrated on the electrode side , the pitch gradient distribution of the negative cholesteric liquid crystal 6 appears, and the mirror reflection state is displayed. After the high-frequency voltage is removed, the original state shown in Figure 2 is restored, and the transmission state is displayed. At the same time, the magnitude of the applied voltage is different, the degree of diffusion of the chiral ionic liquid 5 is different, and thus the reflected wave width is also different, and the transmittance is also different. By adjusting the magnitude of the applied voltage, the transmittance of the negative cholesteric liquid crystal 6 can be adjusted, and the light passes through the color filter to display any color.

In the embodiment of the present invention, the negative cholesteric liquid crystal 6 added with the chiral ionic liquid 5 is used between the upper substrate 1 and the lower substrate 2, and when the negative cholesteric liquid crystal 6 added with the chiral ionic liquid 5 is in a specular reflection state, The effect of mirror can be realized. At the same time, due to the use of cholesteric liquid crystal, no polarizer is required, so the efficiency of light can be greatly improved.

The liquid crystal panel in the liquid crystal display in the embodiment of the present invention may be a reflective liquid crystal panel. Since small reflective LCDs are often used both outdoors and indoors, ambient light alone is not enough for display. Considering the above situation, it is possible to display a light source even in a dark environment by setting a light source in a reflective liquid crystal display. As a reflective liquid crystal display, the light source cannot be arranged on the lower substrate 2 at the back. Generally, the reflective liquid crystal display is provided with a light source on the side of the upper substrate 1 .

FIG. 5 is a schematic diagram of a liquid crystal panel of a reflective liquid crystal display according to an embodiment of the present invention. As shown in FIG. 5 , the reflective liquid crystal panel has an upper substrate 1 and a lower substrate 2 opposite to each other, and a transparent electrode layer 3 is respectively provided on the two substrates, and the transparent electrode layer 3 is connected to an AC power source 4 . A reflection plate 7 is arranged on the side of the lower substrate 2 close to the liquid crystal, and a color filter 8 is arranged on the reflection plate 7 , and the transparent electrode layer 3 is arranged on the color filter 8 . There is negative cholesteric liquid crystal 6 added with chiral ionic liquid 5 between the two substrates. Under low-frequency (100 to 200 Hz) AC signals, the liquid crystal panel can achieve normal display functions; when a DC signal is applied, the liquid crystal layer is in a scattering state of the focal conic texture, so it displays a dark state; when a high-frequency AC signal ( (greater than 8000 Hz), the liquid crystal layer is a planar texture with different pitch distributions, and a mirror effect is realized.

FIG. 6 is a schematic diagram of a liquid crystal panel of a reflective liquid crystal display with a light source added, and a light source and a light guide plate are added on the basis of the foregoing solution. Specifically, a light source 9 and a light guide plate 10 matched with the light source 9 are disposed on the upper substrate 1 , and the light source 9 is disposed on a side surface of the upper substrate 1 . In a bright environment, the light source is turned off, and the ambient light is used for display. In a dark environment, the light source is turned on, and the light emitted from the light source passes through the light guide plate to the liquid crystal layer, and then passes through the color filter and reflective layer to realize the display function.

The second embodiment of the present invention provides a liquid crystal display including the aforementioned liquid crystal panel.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: it still Modifications or equivalent replacements can be made to the technical solutions of the present invention, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present invention.

Claims (8)

1. liquid crystal panel; It is characterized in that; Comprise upper substrate positioned opposite to each other and infrabasal plate; Be respectively equipped with transparent electrode layer on the two substrates, be provided with the negativity cholesteric crystal layer that adds chiral ionic liquid between upper substrate and the infrabasal plate, two transparent electrode layers with have the controllable switch state, can make the negativity cholesteric liquid crystal be the AC power that reflects attitude to be connected.

2. liquid crystal panel according to claim 1 is characterized in that two transparent electrode layers also are connected with direct supply.

3. liquid crystal panel according to claim 1 is characterized in that, is provided with color film at said infrabasal plate near said liquid crystal layer one side.

4. liquid crystal panel according to claim 3 is characterized in that, the transparent electrode layer on the said infrabasal plate is arranged on the said color film.

5. liquid crystal panel according to claim 1 is characterized in that, is provided with the reflection horizon at said infrabasal plate near liquid crystal layer one side, and said reflection horizon is provided with color film.

6. liquid crystal panel according to claim 1 is characterized in that, also comprises light source, and said light source is arranged at the side of said upper substrate.

7. liquid crystal panel according to claim 6 is characterized in that, also is provided with the LGP that cooperates with light source on the said upper substrate.

8. a LCD is characterized in that, comprises arbitrary described liquid crystal panel among the claim 1-7.

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