CN204155049U - Liquid crystal lens and display device - Google Patents

Abstract

The utility model provides a kind of liquid crystal lens and display device, belongs to display technique field, forms stronger transverse electric field and affect the problem of imaging effect between its strip shaped electric poles that can solve existing liquid crystal lens.Liquid crystal lens of the present utility model, comprise: first substrate, second substrate, and the liquid crystal layer be arranged between described first substrate and second substrate, described first substrate is provided with multilayer strip shaped electric poles on the face of described second substrate, and described second substrate is provided with the opposite electrode be at least oppositely arranged with described strip shaped electric poles on the face of described first substrate; Wherein, each layer described strip shaped electric poles mutually insulated and projection zero lap on described first substrate.

Description

Liquid crystal lens and display device

technical field

The utility model belongs to the field of display technology, in particular to a liquid crystal lens and a display device.

Background technique

With the continuous development of display technology, stereoscopic (3D) display has become an important development trend in the display field, and the basic principle of 3D display is to make people's left and right eyes see different images respectively to form a stereo image pair, After the visual processing of the brain, the user has a three-dimensional sense of the image he sees.

At present, 3D displays are divided into two categories: naked eye type and glasses type. Among them, during naked-eye 3D display, images are processed on the display panel to generate stereoscopic images, so that users can experience 3D display with naked eyes without using 3D glasses.

The liquid crystal lens is a way to realize naked-eye 3D display, and the liquid crystal lens is usually arranged on the display panel. As shown in FIG. 1 , the existing liquid crystal lens is usually composed of a first substrate 101, a second substrate 201, and a liquid crystal layer between the two substrates. The first substrate 101 is provided with strip electrodes 102, and the second substrate 201 Plate-shaped electrodes 202 are arranged on the top, and the liquid crystal layer in the middle is driven by the electric field formed between the strip-shaped electrodes 102 and the plate-shaped electrodes 202, so that the liquid crystal layer forms several lenses, so that the images displayed on the display panel are viewed by the left eye respectively. area and the right eye viewing area for refraction to form a stereoscopic image.

Utility model content

The technical problem to be solved by the utility model includes, aiming at the above-mentioned problems existing in the existing liquid crystal lens, to provide a liquid crystal lens and a display device which can effectively improve the imaging effect.

The technical solution adopted to solve the technical problem of the utility model is a liquid crystal lens, comprising: a first substrate, a second substrate, and a liquid crystal layer arranged between the first substrate and the second substrate, and the first substrate A multi-layer strip-shaped electrode is provided on the surface facing the second substrate, and a counter electrode at least opposite to the strip-shaped electrode is provided on the surface of the second substrate facing the first substrate; wherein,

The strip electrodes of each layer are insulated from each other and the projections on the first substrate do not overlap.

If the number of strip electrodes on the first substrate of the liquid crystal lens of the present utility model is the same as the number of strip electrodes arranged on the first substrate of the existing liquid crystal lens, because the electrode strips of the present embodiment are arranged in layers , thereby increasing the distance between two adjacent electrode strips in the height direction (longitudinal direction). According to the field strength formula: E=U/d, the distance in the height direction is increased at this time, that is to say, the d value increases, so the two electrodes are weakened. The strength of the transverse electric field formed between adjacent strip electrodes improves the strength of the prior art because a strong transverse electric field will be generated between two adjacent strip electrodes, and the liquid crystal molecules in the corresponding liquid crystal layer will generate Influence, resulting in the problem that the phase retardation curve formed by the liquid crystal lens is not ideal, and then improves the imaging effect of the electronically controlled liquid crystal lens.

Preferably, the opposite electrode is a plate electrode.

Preferably, two layers of electrodes are arranged on the side of the first substrate facing the second substrate, the first layer of strip electrodes includes a plurality of first strip electrodes, and the second layer of strip electrodes includes a plurality of second electrodes. Strip electrodes, the first strip electrodes and the second strip electrodes are arranged at intervals.

Preferably, when performing 2D image display, the voltage applied to the strip electrodes on the first substrate is 0V.

Preferably, the strip electrodes disposed on the first substrate are divided into multiple repeating units, each repeating unit includes n adjacent strip electrodes, and n is an integer greater than or equal to 2;

When displaying a 3D image, the voltage applied to each strip electrode in each of the repeating units is different.

Further preferably, each strip electrode group includes 6 strip electrodes.

Preferably, a planarization layer is arranged between two adjacent layers of strip-shaped electrodes on the first substrate.

Further preferably, the planarization layer has a thickness of 2 μm˜5 μm.

Preferably, a plurality of protruding structures are disposed on the first substrate, and the second strip electrodes are disposed on the protruding structures.

The technical solution adopted to solve the technical problem of the utility model is a display device, which includes the above-mentioned liquid crystal lens.

Since the display device of the present invention includes the above-mentioned liquid crystal lens, it can effectively improve the poor display caused by the strong transverse electric field formed between two adjacent strip electrodes.

Description of drawings

Fig. 1 is the schematic diagram of existing liquid crystal lens;

Fig. 2 is the simulation result figure of liquid crystal lens in the prior art;

Fig. 3 is the schematic diagram of the liquid crystal lens of embodiment 1 of the present utility model;

FIG. 4 is a diagram showing the simulation results of the liquid crystal lens in Example 1 of the present invention.

The reference signs are: 101, first substrate; 102, strip electrode; first strip electrode, 1021; second strip electrode, 1022; 103, planarization layer; 201, second substrate; 202, plate-shaped electrode.

Detailed ways

In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example 1:

3 and 4, this embodiment provides a liquid crystal lens, which includes: a first substrate 101, a second substrate 201, and a liquid crystal layer arranged between the first substrate 101 and the second substrate 201, the The surface of the first substrate 101 facing the second substrate 201 is provided with a multi-layer strip electrode 102 , and the surface of the second substrate 201 facing the first substrate 101 is provided with at least one strip electrode opposite to the strip electrode. The opposite electrodes; wherein, the strip electrodes 102 of each layer are insulated from each other and the projections on the first substrate 101 do not overlap. There is a certain voltage difference between the voltages applied to the opposite electrode and the strip electrode 102 to form an electric field to drive the liquid crystal molecules to deflect, thereby forming a plurality of liquid crystal lenses.

When the number of strip electrodes 102 on the first substrate 101 of the liquid crystal lens of this embodiment is the same as the number of strip electrodes 102 arranged on the first substrate 101 of the existing liquid crystal lens, since the electrode strips of this embodiment are divided layer, thus increasing the distance between two adjacent electrode strips in the height direction (longitudinal direction). According to the field strength formula: E=U/d, the distance in the height direction is increased at this time, that is to say, the d value increases, so Weaken the strength of the transverse electric field formed between the two adjacent strip electrodes 102, thereby improving the corresponding liquid crystal layer in the prior art due to a strong transverse electric field will be generated between the two adjacent strip electrodes 102. The influence of the liquid crystal molecules in the liquid crystal lens causes the phase retardation curve formed by the liquid crystal lens to be unsatisfactory, so that the imaging effect of the liquid crystal lens is poor.

Specifically, FIG. 2 is an experimental result diagram of a phase retardation curve formed by a conventional liquid crystal lens. As shown in FIG. 1 , in order to realize 3D display, there is a certain difference between the voltages applied to the adjacent strip electrodes 102 arranged on the first substrate 101, and the distance between the strip electrodes is relatively close, so the two-phase A strong transverse electric field will be generated between the adjacent strip electrodes 102, which will affect the liquid crystal molecules in the corresponding liquid crystal layer, thereby causing the phase delay formed by the liquid crystal lens to be unsatisfactory, that is, the phase delay curve at the position corresponding to the transverse electric field Glitches (that is, the positions circled in Figure 2) appear, resulting in poor imaging effects of the liquid crystal lens. The phase delay curve formed by the liquid crystal lens of this embodiment is shown in FIG. 4 , and the phase delay curve is obviously flat (the position circled in FIG. 4 ), thereby improving the imaging effect of the electronically controlled liquid crystal lens.

Since the same voltage is applied to the opposite electrodes on the second substrate 201 when displaying images, it is preferable that the opposite electrodes are plate electrodes 202 . Of course, the opposite electrode can also be a slit electrode, as long as the opposite electrode is provided on the second substrate 201 corresponding to the strip electrode 102 of the first substrate 101, at this time, the second substrate 201 can be adjusted to The width of the slit of the slit electrode, so that the deflection direction of the liquid crystal molecules at the position of the slit is approximately the same as the deflection direction of the liquid crystal at the position of the electrode.

In order to make the structure of the liquid crystal lens simple, preferably, two layers of electrodes are arranged on the side of the first substrate 101 facing the second substrate 201, and the first layer of strip electrodes includes a plurality of first strip electrodes 1021, The second layer of strip electrodes includes a plurality of second strip electrodes 1022, and the first strip electrodes 1021 and the second strip electrodes 1022 are arranged at intervals. At this time, the adjacent first strip electrodes 1021 and the second strip electrodes The horizontal electric field generated between the electrodes 1022 is the smallest, and the imaging effect of the liquid crystal lens is most improved. Of course, on the side of the first substrate 101 facing the second substrate 201 , three, four or more layers of strip electrodes 102 are sequentially arranged, as long as the projections of the strip electrodes 102 on the first substrate 101 do not overlap.

By disposing the liquid crystal lens of this embodiment on the light emitting surface of the existing display panel, 2D picture display and 3D picture display can be realized.

Preferably, when displaying 2D images, the voltage applied to the two layers of strip electrodes 102 disposed on the first substrate 101 is 0V, that is, no voltage is applied to the strip electrodes 102 . Thus, a 2D image is displayed through an existing display panel.

Preferably, the strip electrodes 102 disposed on the first substrate 101 are divided into multiple repeating units, each repeating unit includes n adjacent strip electrodes 102, and n is an integer greater than or equal to 2; when performing 3D When the screen is displayed, the voltage applied to each strip electrode 102 in each of the repeating units is different. Therefore, by applying a voltage to the two-layer strip electrode 102 to control the deflection of the liquid crystal molecules, the user's left and right eyes can watch two pictures at different positions. At this time, the left-eye picture and the right-eye picture are combined to form a 3D three-dimensional Display the image. Although the voltages applied to any two adjacent strip electrodes 102 in the two layers of strip electrodes 102 are different, that is, there is a voltage difference, but because there is a height difference between the two layers of strip electrodes 102, according to the field strength formula: E=U/d, at this moment, the distance in the height direction is increased, that is to say, the d value increases, so the intensity of the transverse electric field formed between two adjacent strip electrodes 102 is weakened, thereby improving the existing technology due to A strong transverse electric field will be generated between two adjacent strip electrodes 102, which will affect the liquid crystal molecules in the corresponding liquid crystal layer, causing burrs to appear on the phase delay curve formed by the liquid crystal lens, so that the imaging effect of the liquid crystal lens is poor. The problem. Further preferably, each repeating unit includes 6 strip-shaped electrodes 102 , of course, each repeating unit is not limited to including 6 strip-shaped electrodes 102 , which can be set according to specific situations.

Preferably, a planarization layer 103 is disposed between the strip electrodes 102 in two adjacent layers, so that there is a certain height difference between the strip electrodes 102 in two adjacent layers and they are insulated from each other. Specifically, as shown in FIG. 3 , a planarization layer is provided between the first layer of strip electrodes and the second layer of strip electrodes. Further preferably, the planarization layer 103 has a thickness of 2 μm˜5 μm. The height difference between two adjacent strip electrodes 102 is realized by the thickness of the planarization layer 103 , thereby increasing the distance between two adjacent strip electrodes 102 to weaken the lateral electric field between the two strip electrodes 102 . It is further preferable that the thickness of the planarization layer is 2 μm, which can make the display device lighter and thinner at this time, and of course it is not limited to this thickness, and can also be specifically set according to specific situations. Of course, in order to make the strip electrodes 102 of two adjacent layers have a certain height difference, at this time, it may also be preferable to set a plurality of protruding structures on the first substrate 101, and the second strip electrodes 1022 It is arranged on the protruding structure so that there is a height difference between the two layers of strip electrodes 102 , thereby weakening the transverse electric field between the strip electrodes 102 and the strip electrodes 102 .

It should be noted that the adjacent strip electrodes 102 described in this embodiment refer to two adjacent strip electrodes 102 in two adjacent layers, rather than two adjacent strip electrodes 102 arranged on the same layer. 102.

Example 2:

This embodiment provides a display device, which includes the liquid crystal lens in Embodiment 1. The display device may be any product or component with a display function such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, and the like.

Since the display device of this embodiment includes the liquid crystal lens in Embodiment 1, it can effectively improve the poor display caused by the strong lateral electric field formed between two adjacent strip electrodes 102 .

Of course, the display device of this embodiment is preferably a 3D display device, and of course it can also realize 2D display, specifically by changing the voltage applied to the strip electrode 102. The realization of 3D display and 2D display is similar to that of current There are the same techniques, which will not be described in detail here.

Of course, the display device of this embodiment may also include other conventional structures, such as a display driving unit and the like.

It can be understood that, the above embodiments are only exemplary embodiments adopted to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present utility model, and these variations and improvements are also regarded as the protection scope of the present utility model.

Claims (10)

1. A liquid crystal lens, comprising: a first substrate, a second substrate, and a liquid crystal layer arranged between the first substrate and the second substrate, wherein the first substrate faces the second substrate A multi-layer strip electrode is provided on the surface of the second substrate, and an opposite electrode at least opposite to the strip electrode is provided on the surface of the second substrate facing the first substrate; wherein, The strip electrodes of each layer are insulated from each other and the projections on the first substrate do not overlap. 2. The liquid crystal lens according to claim 1, wherein the opposite electrode is a plate electrode. 3. The liquid crystal lens according to claim 1, wherein two layers of electrodes are arranged on the side of the first substrate facing the second substrate, and the first layer of strip electrodes includes a plurality of first strip electrodes The second layer of strip-shaped electrodes includes a plurality of second strip-shaped electrodes, and the first strip-shaped electrodes and the second strip-shaped electrodes are arranged at intervals. 4. The liquid crystal lens according to any one of claims 1 to 3, wherein when performing 2D image display, the voltage applied to the strip electrodes on the first substrate is 0V. 5. The liquid crystal lens according to any one of claims 1 to 3, wherein the strip electrodes arranged on the first substrate are divided into a plurality of repeating units, and each repeating unit includes n adjacent strip electrodes, n is an integer greater than or equal to 2; When displaying a 3D image, the voltage applied to each strip electrode in each of the repeating units is different. 6. The liquid crystal lens according to claim 5, wherein each of the repeating units includes 6 strip electrodes. 7. The liquid crystal lens according to any one of claims 1 to 3, wherein a planarization layer is provided between two adjacent layers of strip electrodes on the first substrate. 8 . The liquid crystal lens according to claim 7 , wherein the planarization layer has a thickness of 2 μm˜5 μm. 9. The liquid crystal lens according to claim 3, wherein a plurality of protruding structures are disposed on the first substrate, and the second strip electrodes are disposed on the protruding structures. 10. A display device, characterized in that the display device comprises the liquid crystal lens according to any one of claims 1-9.