CN104330916A - A full-resolution dual-screen display and its driving method - Google Patents

Abstract

The invention provides a full-resolution double-picture display and a driving method thereof. The dual screen display includes: a polarizing plate; a base panel located below the polarizer; the backlight module is positioned below the basic panel and used for providing light emitted by the backlight source; and the liquid crystal lens comprises at least two switchable operation modes, when light rays from the backlight module enter the liquid crystal lens, different operation modes correspond to different light ray deflection directions, and different pictures are provided by virtue of different light ray deflection directions. Compared with the prior art, the liquid crystal lens can be switched among different operation modes, and the base panel is matched with the liquid crystal lens to display different pictures at the preset frequency. The light splitting angle of the double-picture display is only related to the design of the liquid crystal lens, and the same light splitting effect can be achieved on displays with different sizes and resolutions by the same design.

Description

A full-resolution dual-screen display and its driving method

technical field

The invention relates to a liquid crystal display technology, in particular to a full-resolution dual-screen display and a driving method thereof.

Background technique

In the prior art, TN (Twisted Nematic, twisted nematic) liquid crystal panel is a widely used panel technology, such as most of the screens of notebook computers adopt this panel. As we know, images on these screens change in brightness and color when viewed from different angles. However, relevant R&D personnel have developed a panel technology that simultaneously displays two different images on one screen (ie, screen dual display technology) by utilizing the above-mentioned characteristics. In this way, two movies with different content can be played simultaneously on a single monitor, and the audience only needs to sit at the corresponding viewing angle for which movie they want to watch. In addition, when two people play a card game face to face, both parties can only see their own deck of cards on the screen, while the onlookers can have a panoramic view of both cards, which greatly enhances the visual experience.

At present, the screen dual display technology mainly includes two implementation methods. One is to use a parallax barrier to achieve a light splitting effect, so that viewers at different positions can see different images. However, when the distance between these viewers is relatively long, in order to see different pictures, the required beam splitting angle is larger, and the thickness (inner-thickness) from the grating to the liquid crystal display screen is smaller. For example, when the beam splitting angle of the dual-screen display is above 30°, the thickness from the grating to the liquid crystal display is only 0.31 mm. In addition, the higher the resolution, the smaller the thickness requirement from the grating to the liquid crystal display, and the existing dual-view display is often limited by this thickness bottleneck. The second is a grating (LC barrier) made of liquid crystal. A liquid crystal layer is sandwiched between two glass substrates. Because the grating can be opened and closed using the principle of liquid crystal clamping, this solution can switch the display screen to a dual-screen display. or a normal monitor. However, since the thickness of the grating and the liquid crystal display screen will be relatively large due to the two substrates, it is difficult to achieve the process specification with a thickness of less than 0.31 mm required by the dual-screen display. In addition, the different viewers of the second option can only see the image with half the resolution of the original base panel, and the picture quality is poor.

It can be seen from the above that the existing fixed barrier (fixed barrier) method or liquid crystal barrier method have their own design defects. In view of this, how to design a novel dual-screen display to solve the current above-mentioned problems is a relevant technology in the industry. A problem that needs to be solved urgently.

Contents of the invention

Aiming at the above-mentioned defects in the prior art, the present invention provides a novel full-resolution dual-screen display and a driving method thereof.

According to one aspect of the present invention, a full-resolution dual-screen display is provided, including:

a polarizer;

a basic panel, located below the polarizer;

A backlight module, located below the base panel, for providing light from a backlight source; and

A liquid crystal lens, including at least two switchable operating modes. When the light from the backlight module enters the liquid crystal lens, different operating modes correspond to different light deflection directions. The dual-screen display uses different The direction of light deflection can provide different pictures.

In one embodiment, the liquid crystal lens is disposed between the polarizer and the base panel.

In one embodiment, the liquid crystal lens is disposed between the base panel and the backlight module.

In one embodiment, the liquid crystal lens further includes an off mode, and when the liquid crystal lens is closed, the dual-view display provides the same picture.

In one embodiment, the liquid crystal lens includes a first electrode, a second electrode, and a liquid crystal layer interposed between the first electrode and the second electrode, and the first electrode and the second electrode The voltage difference formed between the two electrodes switches the operation mode of the liquid crystal lens.

In one of the embodiments, when the voltage difference is the first voltage, the liquid crystal lens works in the first mode, and the dual-screen display provides and displays the first screen along the first light deflection direction; when the When the voltage difference is the second voltage, the liquid crystal lens works in the second mode, and the dual-picture display provides and displays a second picture along the second light deflection direction.

In one embodiment, the switching frequency of the first voltage and the second voltage is 120 Hz.

In one embodiment, the dual-image display is a stereoscopic display, and when the liquid crystal lens operates in different operating modes, the left and right eyes of a person receive different images in time-sharing to superimpose to form a stereoscopic image.

According to another aspect of the present invention, a method for driving a full-resolution dual-screen display is provided, including the following steps:

forming a polarizer;

forming a base panel under the polarizer;

forming a liquid crystal lens under the base panel, the liquid crystal lens including a first electrode, a second electrode, and a liquid crystal layer interposed between the first electrode and the second electrode;

forming a backlight module under the liquid crystal lens to provide light emitted by a backlight; and

Applying different voltage differences between the first electrode and the second electrode of the liquid crystal lens at a preset switching frequency, so that the liquid crystal lens works in two switchable operating modes, and different operating modes correspond to different Light deflection direction. When the light from the backlight module enters the liquid crystal lens, the dual-screen display provides different images through different light deflection directions.

In one of the embodiments, when the voltage difference is the first voltage, the liquid crystal lens works in the first mode, and the dual-screen display provides and displays the first screen along the first light deflection direction; when the When the voltage difference is the second voltage, the liquid crystal lens works in the second mode, and the dual-picture display provides and displays a second picture along the second light deflection direction.

In the dual-screen display and its driving method of the present invention, the base panel is located under the polarizer, the backlight module is located under the base panel, and a The liquid crystal lens, the liquid crystal lens includes at least two switchable operating modes, when the light from the backlight module is incident, the different operating modes of the liquid crystal lens correspond to different light deflection directions, so that the dual-screen display can use different light deflections The folding direction provides different pictures. Compared with the prior art, the present invention enables the liquid crystal lens to switch between different operating modes, and the base panel cooperates with the liquid crystal lens to display different pictures at a predetermined frequency. Moreover, the beam splitting angle of the dual-screen display of the present invention has nothing to do with the internal thickness (i.e. the thickness between the grating and the liquid crystal display), but only with the design of the liquid crystal lens. The same design can achieve the same effect on displays of different sizes and resolutions. spectroscopic effect. In addition, the display of the present invention can also open or close the liquid crystal lens, so that it can freely switch between double-screen display and single-screen display, thereby improving the control flexibility of the product.

Description of drawings

Readers will have a clearer understanding of various aspects of the present invention after reading the detailed description of the present invention with reference to the accompanying drawings. in,

FIG. 1A is a schematic structural diagram of a dual-screen display in the prior art;

FIG. 1B shows a schematic diagram of the optical path of the dual-screen display of FIG. 1A;

Fig. 2 shows a schematic structural view of a fixed grating type dual screen display in the prior art;

Fig. 3 shows a schematic structural diagram of a liquid crystal grating type switchable between a dual-screen display and an ordinary display in the prior art;

FIG. 4A shows a schematic diagram of an optical path of a liquid crystal lens of a dual-screen display in an operating mode according to an embodiment of the present invention;

FIG. 4B shows a schematic diagram of the optical path of the liquid crystal lens of the dual-screen display of FIG. 4A in another operating mode;

FIG. 4C shows a schematic diagram of the optical path of the liquid crystal lens of the dual-screen display of FIG. 4A in a closed state;

FIG. 5A shows a schematic diagram of an optical path of a dual-screen stereoscopic display at frame N according to another embodiment of the present invention;

FIG. 5B shows a schematic diagram of the optical path of the dual-screen stereoscopic display in FIG. 5A at the (N+1)th frame; and

FIG. 6 shows a block flow diagram of a driving method of a dual-screen display according to yet another embodiment of the present invention.

Detailed ways

In order to make the technical content disclosed in this application more detailed and complete, reference may be made to the drawings and the following various specific embodiments of the present invention, and the same symbols in the drawings represent the same or similar components. However, those skilled in the art should understand that the examples provided below are not intended to limit the scope of the present invention. In addition, the drawings are only for schematic illustration and are not drawn according to their original scale.

FIG. 1A is a schematic structural diagram of a dual-screen display in the prior art. FIG. 1B shows a schematic diagram of an optical path of the dual-screen display in FIG. 1A .

Referring to FIG. 1A and FIG. 1B, the existing dual-screen display includes a polarization transformation film 100, a polarizer 110, a color filter substrate, a liquid crystal layer 120 and a thin film transistor array substrate 130. Wherein, the polarizing plate 110 is located under the polarizing film 100 . The liquid crystal layer 120 is disposed between the color filter substrate and the thin film transistor array substrate 130 . The thin film transistor array substrate 130 is located on a side close to the backlight module (not shown in the figure).

In order to provide different images to viewers at different positions, the dual image display further includes a parallax barrier 140, such as grating glass. The thickness (inner-thickness) from the grating glass 140 to the liquid crystal display panel is S. Use the grating glass to achieve light splitting effect. As shown in FIG. 1B , under the parallax shielding effect of the grating glass 140, the viewer A can see the picture F2 but not the picture F1, and the viewer B can see the picture F1 but not the picture F1. It does not reach screen F2. However, when the horizontal distance between the viewer A and the viewer B is relatively long, in order to see different images F1 and F2, the required beam splitting angle a is larger. Thickness is smaller. For example, when the beam-splitting angle of the dual-screen display is above 30°, the thickness from the grating glass to the liquid crystal display panel is only 0.31 mm, and the existing dual-view display is often limited by this thickness bottleneck.

FIG. 2 shows a schematic structural diagram of a fixed-barrier dual-screen display in the prior art.

As shown in FIG. 2 , for a fixed grating type dual-screen display, the grating 200 is made by coating, and its inner-thickness D1 is a glass substrate in the polarizer 210 and the basic panel. 220 sum of respective thicknesses. In addition, the splitting angle of the dual-screen display is β1. Although this structure can meet the requirement that the thickness from the grating to the liquid crystal display panel is less than 0.31 mm, it cannot be switched to an ordinary display to display images.

Fig. 3 is a schematic structural diagram of a liquid crystal grating type switchable between a dual-screen display and a normal display in the prior art.

As shown in FIG. 3 , for a switchable structure between a dual-screen display and a common display, a liquid crystal barrier (LC barrier) 240 is provided between the upper polarizer and the lower polarizer 210 . Alignment electrodes are respectively arranged above and below the liquid crystal grating 240 , and the grating can be turned on or off by applying a voltage value to the matching electrode 250 and the lower electrode, so that the structure can be switched between a dual-screen display and a normal display. However, different from FIG. 2 , its inner-thickness D2 is the sum of the respective thicknesses of the glass substrate 230, the polarizer 210, and the glass substrate 220 in the base panel. Since the thickness D2 is greater than the thickness D1, the beam splitting angle β2 is smaller than the splitting angle β1 in FIG. 2 . As a result, the thickness D2 is difficult to meet the specification requirement that the thickness from the grating to the liquid crystal display panel is less than 0.31 mm.

In order to overcome the above-mentioned defects in the prior art, the present invention provides a novel dual-screen display and its driving method. FIG. 4A shows a schematic diagram of an optical path of a liquid crystal lens of a dual-image display in an operating mode according to an embodiment of the present invention. FIG. 4B shows a schematic diagram of the optical path of the liquid crystal lens of the dual-screen display in FIG. 4A in another operating mode. FIG. 4C shows a schematic diagram of the optical path of the liquid crystal lens in the closed state of the dual view display of FIG. 4A .

In this embodiment, the full-resolution dual-image display of the present invention includes a polarizer 300 , a base panel 310 , a liquid crystal lens 320 and a backlight module 330 . Wherein, the base panel 310 is located under the polarizer 300 , and the liquid crystal lens 320 is located under the base panel 310 . The backlight module 330 is located under the liquid crystal lens 320 and is used to provide light emitted by a backlight. Those skilled in the art should understand that, in some other embodiments, the liquid crystal lens 320 can also be arranged between the polarizer 300 and the base panel 310, that is, the liquid crystal lens 320 is located under the polarizer 300, and the base panel 310 Located between the liquid crystal lens 320 and the backlight module 330 .

Preferably, the liquid crystal lens 320 includes a first electrode 321, a second electrode 323, and a liquid crystal layer 325 sandwiched between the first electrode 321 and the second electrode 323, by the first electrode 321 and the second electrode 323 to switch the operation mode of the liquid crystal lens 320.

Specifically, when the voltage difference is the first voltage, the liquid crystal lens 320 works in the first mode (or called "leftward deflection mode"), and the dual-image display provides the first image along the direction in which light is deflected to the left. To viewer A, as shown in Figure 4A. When the voltage difference is the second voltage, the liquid crystal lens 320 works in the second mode (or called "rightward deflection mode"), and the double-picture display provides the second picture to the viewer B along the direction of light deflection to the right , as shown in Figure 4B. For example, the switching frequency between the first voltage and the second voltage is 120 Hz. In addition, the liquid crystal lens 320 also includes an off mode. When the applied voltage on the electrodes 321 and 323 of the liquid crystal lens 320 is removed, the light incident on the liquid crystal lens 320 will not be deflected. As a common display, it provides the same picture to viewers in different positions. In some embodiments, the liquid crystal lens 320 switches between the first mode and the second mode at a frequency of 120 Hz, and the base panel 310 cooperates with the liquid crystal lens 320 to switch display images at a frequency of 120 Hz.

4A-4C above, it can be seen that the dual-screen display of the present invention can switch the liquid crystal lens between different operating modes, and the base panel cooperates with the liquid crystal lens to display different images at a predetermined frequency. Moreover, the beam splitting angle of the dual-screen display of the present invention has nothing to do with the internal thickness (i.e. the thickness between the grating and the liquid crystal display), but only with the design of the liquid crystal lens. The same design can achieve the same effect on displays of different sizes and resolutions. spectroscopic effect.

FIG. 5A shows a schematic diagram of an optical path of a dual-screen stereoscopic display at frame N according to another embodiment of the present invention. FIG. 5B shows a schematic diagram of the optical path of the dual-screen stereoscopic display in FIG. 5A at the (N+1)th frame.

5A and 5B, in this embodiment, the dual view display of the present invention can be used as a stereoscopic display. By adjusting the curvature of the liquid crystal lens, the refractive index change rate of the liquid crystal lens is small under the condition of a single pitch (pitch), and the beam splitting angle becomes smaller. When the liquid crystal lens 320 works in different operating modes, the human left eye Different images are received by the right eye in time-sharing to superimpose to form a stereoscopic image. For example, first the right eye receives a picture in the first frame (as shown in Figure 5A), and then the left eye receives another picture in the second frame (as shown in Figure 5B), through the superposition of these two pictures in the human brain, the A stereoscopic image is formed.

FIG. 6 shows a block flow diagram of a driving method of a dual-screen display according to yet another embodiment of the present invention.

Referring to FIG. 6 , in conjunction with FIGS. 4A to 4C , in the driving method of the full-resolution dual-screen display, steps S11, S13, S15 and S17 are first performed to sequentially form a polarizer 300, a base panel 310, a The liquid crystal lens 320 and a backlight module 330, the base panel 310 is under the polarizer 300, the liquid crystal lens 320 is located under the base panel 310, the liquid crystal lens 320 includes a first electrode 321, a second electrode 323 and a second electrode 323 sandwiched between A liquid crystal layer 325 is formed between the first electrode 321 and the second electrode 323 , and the backlight module 330 is located under the liquid crystal lens 320 .

Then step S19 is executed to apply different voltage differences between the first electrode 321 and the second electrode 323 of the liquid crystal lens 320 at a preset switching frequency, so that the liquid crystal lens 320 works in two switchable operating modes, different The operating modes correspond to different light deflection directions. When the light from the backlight module 330 enters the liquid crystal lens 320 , the dual-screen display provides different images through different light deflection directions.

In the dual-screen display and its driving method of the present invention, the base panel is located under the polarizer, the backlight module is located under the base panel, and a The liquid crystal lens, the liquid crystal lens includes at least two switchable operating modes, when the light from the backlight module is incident, the different operating modes of the liquid crystal lens correspond to different light deflection directions, so that the dual-screen display can use different light deflections The folding direction provides different pictures. Compared with the prior art, the present invention enables the liquid crystal lens to switch between different operating modes, and the base panel cooperates with the liquid crystal lens to display different pictures at a predetermined frequency. Moreover, the beam splitting angle of the dual-screen display of the present invention has nothing to do with the internal thickness (i.e. the thickness between the grating and the liquid crystal display), but only with the design of the liquid crystal lens. The same design can achieve the same effect on displays of different sizes and resolutions. spectroscopic effect. In addition, the display of the present invention can also open or close the liquid crystal lens, so that it can freely switch between double-screen display and single-screen display, thereby improving the control flexibility of the product.

Hereinbefore, specific embodiments of the present invention have been described with reference to the accompanying drawings. However, those skilled in the art can understand that without departing from the spirit and scope of the present invention, various changes and substitutions can be made to the specific embodiments of the present invention. These changes and substitutions all fall within the scope defined by the claims of the present invention.

Claims (10)

1. A full resolution dual picture display, comprising:

a polarizing plate;

a base panel located below the polarizer;

the backlight module is positioned below the basic panel and used for providing light emitted by a backlight source; and

the liquid crystal lens comprises at least two switchable operation modes, when light rays from the backlight module enter the liquid crystal lens, different operation modes correspond to different light ray deflection directions, and the double-picture display provides different pictures by virtue of different light ray deflection directions.

2. The full-resolution dual panel display according to claim 1, wherein the liquid crystal lens is disposed between the polarizer and the base panel.

3. The full-resolution dual-screen display according to claim 1, wherein the liquid crystal lens is disposed between the base panel and the backlight module.

4. The full resolution dual view display of claim 1, wherein the lc lens further comprises an off mode, and the dual view display provides the same view when the lc lens is off.

5. The full-resolution dual-screen display according to claim 1, wherein the liquid crystal lens comprises a first electrode, a second electrode and a liquid crystal layer sandwiched between the first electrode and the second electrode, and the operation mode of the liquid crystal lens is switched by a voltage difference formed between the first electrode and the second electrode.

6. The full-resolution dual-display device according to claim 5, wherein when the voltage difference is a first voltage, the LC lens operates in a first mode, and the dual-display device provides and displays a first image along a first light deflection direction; when the voltage difference is a second voltage, the liquid crystal lens works in a second mode, and the dual-picture display provides and displays a second picture along the second light deflection direction.

7. The full resolution dual picture display according to claim 6, wherein the switching frequency of the first voltage and the second voltage is 120 Hz.

8. The full-resolution dual-view display device as claimed in claim 1, wherein the dual-view display device is a stereoscopic display device, and when the lc lens operates in different operation modes, the left eye and the right eye of the human being receive different views to be superimposed to form a stereoscopic image.

9. A driving method of a full-resolution dual screen display, the driving method comprising the steps of:

forming a polarizing plate;

forming a base panel below the polarizer;

forming a liquid crystal lens below the base panel, the liquid crystal lens including a first electrode, a second electrode, and a liquid crystal layer sandwiched between the first electrode and the second electrode;

forming a backlight module below the liquid crystal lens to provide light emitted by a backlight source; and

and applying different voltage difference values between the first electrode and the second electrode of the liquid crystal lens at a preset switching frequency, so that the liquid crystal lens works in two switchable operation modes, wherein different operation modes correspond to different light deflection directions, and when light from the backlight module enters the liquid crystal lens, the dual-picture display provides different pictures by virtue of different light deflection directions.

10. The method as claimed in claim 9, wherein when the voltage difference is a first voltage, the lc lens operates in a first mode, and the dual-display provides and displays a first image along a first light deflection direction; when the voltage difference is a second voltage, the liquid crystal lens works in a second mode, and the dual-picture display provides and displays a second picture along the second light deflection direction.