CN103018975A - Stereoscopic display device capable of displaying two-dimensional and three-dimensional images - Google Patents

Abstract

A three-dimensional display device capable of displaying two-dimensional and three-dimensional images comprises a display device, a lens unit and a switchable polarized light device. The display device is provided with a display surface, and the display surface is used for displaying a picture with a linear polarization direction. The switchable polarized light device is arranged between the display device and the lens unit and comprises two substrates, a liquid crystal layer arranged between the substrates and two transparent conductive pattern layers. The transparent conductive pattern layer is arranged between one of the substrates and the liquid crystal layer and respectively comprises a plurality of electrode strips positioned on the display surface.

Description

Stereoscopic display device capable of displaying screens of two-dimensional and three-dimensional images

technical field

The invention relates to a stereoscopic display device, in particular to a stereoscopic display device capable of displaying pictures of two-dimensional and three-dimensional images.

Background technique

In recent years, with the continuous improvement of display-related technologies, the development and application of stereoscopic display technologies have become more and more vigorous. The main principle of stereoscopic display technology is to make the viewer's left eye and right eye receive different images respectively, and the images received by the left eye and right eye will be analyzed and overlapped by the brain so that the viewer perceives the layering of the image screen and depth, thereby creating a three-dimensional effect.

At present, the stereoscopic display technology can be roughly divided into two categories: those that need to wear glasses (glasses type) and those that do not need to wear glasses (naked-eye type). Generally, the naked-eye 3D display device is composed of a parallax barrier and a display panel, so the user does not need to wear glasses, and thus has better convenience than the glasses-type 3D display device. Moreover, a general display device is not limited to be used for stereoscopic display only, so it is required to have a switching function between two-dimensional and three-dimensional display modes. In order to achieve a switchable 2D and 3D display mode, a liquid crystal panel is usually used to replace the fixed parallax barrier. Since the liquid crystal panel has the characteristic of switching between the parallax barrier and the transparent state, it can display different images to present different effects after matching with the display panel, so that the stereoscopic display device can display two-dimensional images or three-dimensional images.

However, the stereoscopic display device composed of a liquid crystal panel and a display panel can only display images that are all two-dimensional images in the two-dimensional display mode, or display images that are all three-dimensional images in the three-dimensional display mode, but cannot simultaneously display images with partial two-dimensional images. 3D images and partial 3D images.

In view of this, in addition to providing a stereoscopic display device capable of switching between 2D images and 3D images, it is a goal of the industry to provide a stereoscopic display device capable of simultaneously displaying partial 2D images and partial 3D images.

Contents of the invention

The main purpose of the present invention is to provide a stereoscopic display device capable of displaying pictures of 2D and 3D images, so as to display pictures with part of 2D images and part of 3D images.

To achieve the above purpose, the present invention provides a stereoscopic display device capable of displaying two-dimensional and three-dimensional images, which includes a display device, a lens unit and a switchable polarizer. The display device has a display surface, and the display surface is used for displaying a picture with a linear polarization direction. The lens unit is disposed on the display surface of the display device. The switchable polarizing device is arranged between the display device and the lens unit, and the switchable polarizing device includes a first substrate, a second substrate, a liquid crystal layer, a first transparent conductive pattern layer, and a second transparent conductive pattern layer , a third transparent conductive pattern layer and a fourth transparent conductive pattern layer. The second substrate is arranged opposite to the first substrate, and the liquid crystal layer is arranged between the first substrate and the second substrate. The first transparent conductive pattern layer is disposed between the first substrate and the liquid crystal layer, and includes a plurality of first electrode strips, wherein there is a first gap between any two adjacent first electrode strips. The second transparent conductive pattern layer is disposed between the first transparent conductive pattern layer and the liquid crystal layer, and the second transparent conductive pattern layer includes a plurality of second electrode strips. Each second electrode strip covers the first gap in a projection direction perpendicular to the first substrate, so that the first electrode strip and the second electrode strip cover the entire display surface, wherein each first electrode strip and each second electrode strip are along the Alternately arranged in a first direction. The third transparent conductive pattern layer is arranged between the second substrate and the liquid crystal layer, and includes third electrode strips, wherein there is a second gap between any two adjacent third electrode strips, and the fourth transparent conductive pattern layer is set Between the third transparent conductive pattern layer and the liquid crystal layer, the fourth transparent conductive pattern layer includes a plurality of fourth electrode strips. Each fourth electrode strip covers the second gap in a projection direction perpendicular to the second substrate, so that the third electrode strip and the fourth electrode strip cover the entire display surface.

The present invention utilizes a switchable polarizing device and a lens unit to cooperate with a display panel capable of displaying pixels with a linear polarization direction to provide a stereoscopic display device capable of displaying two-dimensional and three-dimensional images. Moreover, the present invention arranges first electrode strips and second electrode strips that can cover the entire display surface on the first substrate of the switchable polarization device or/and arranges a third electrode that can cover the entire display surface on the second substrate The strip and the fourth electrode strip are used to reduce the optical path difference generated by different light rays passing through the switchable polarizing device, thereby avoiding the generation of moiré fringes.

Description of drawings

FIG. 1 is a schematic cross-sectional view of a stereoscopic display device capable of displaying 2D and 3D images according to a first embodiment of the present invention.

FIG. 2 is a schematic side view of the switchable polarization device according to the first embodiment of the present invention.

3 is a schematic diagram of the first frame of the stereoscopic display device displaying 2D and 3D images and the voltage levels input to the switchable polarizing device of the present invention.

FIG. 4 is a schematic diagram of a second frame for displaying 2D and 3D images by the stereoscopic display device of the present invention and voltage signals input to the switchable polarization device.

FIG. 5 is a schematic diagram of light traveling directions when the stereoscopic display device according to the first embodiment of the present invention displays 2D and 3D images.

6 is a schematic cross-sectional view of a switchable polarization device according to a second embodiment of the present invention.

7 is a schematic cross-sectional view of a switchable polarization device according to a third embodiment of the present invention.

FIG. 8 is a schematic cross-sectional view of a stereoscopic display device according to a fourth embodiment of the present invention.

[Description of main component symbols]

100 Stereoscopic display device 102 Display device

102a Display surface 104 Lens unit

106 Switchable Polarization Device 108 Organic Light Emitting Diode Display Panel

108a pixel unit 110 linear polarizer

110a First linear polarization direction 111a Right eye pixel unit

111b left eye pixel unit 112 birefringent lens

114 Single refraction lens 116 Convex mirror

118 Adhesive layer 120 First substrate

122 Second substrate 124 Liquid crystal layer

124a Liquid crystal molecules 126 The first transparent conductive pattern layer

126a first electrode strip 126b first gap

128 The first insulation layer 128a The first perforation

130 second transparent conductive pattern layer 130a second electrode strip

132 third transparent conductive pattern layer 132a third electrode strip

132b Second gap 134 Second insulating layer

134a Second perforation 136 Fourth transparent conductive pattern layer

136a fourth electrode strip 138 first direction

140 Second Direction 142 First Alignment Film

142a First Alignment Direction 144 Second Alignment Film

144a Second alignment direction 146 First picture

148 Second picture 150 Two-dimensional image area

152 3D image area 154 Second linear polarization direction

156 Switchable polarization device C1 Voltage signal of the first line

C2 Voltage signal of the second row R1 Voltage signal of the first column

R2 second column voltage signal V1 first voltage level

V2 Second voltage level V3 Third voltage level

V4 fourth voltage level

Detailed ways

Please refer to FIG. 1 . FIG. 1 is a schematic cross-sectional view of a stereoscopic display device capable of displaying 2D and 3D images according to a first embodiment of the present invention. As shown in FIG. 1 , a stereoscopic display device 100 capable of displaying 2D and 3D images in this embodiment includes a display device 102 , a lens unit 104 and a switchable polarizer 106 . The display device 102 has a display surface 102a for displaying images, and the images displayed from the display surface 102a have a first linear polarization direction 110a. Moreover, the lens unit 104 is disposed above the display surface 102 a of the display device 102 , and the switchable polarizing device 106 is disposed between the lens unit 104 and the display device 102 . Wherein, when the light with the first linear polarization direction 110a passes through the lens unit 104, the lens unit 104 will refract the light and have a lens effect. When the light with a second linear polarization direction 154 ( FIG. 5 ) perpendicular to the first linear polarization direction 110 a passes through the lens unit 104 , the lens unit 104 does not refract the light but has a transparent effect. In addition, the switchable polarization device 106 is used to change or maintain the first linear polarization direction 110a of the light passing therethrough. Therefore, when the stereoscopic display device 100 intends to display a frame with part of the 2D image and part of the 3D image, the frame displayed by the display device 102 can be divided into a 3D image area and a 2D image area. Moreover, the switchable polarizing device 106 does not change the first linear polarization direction 110a of the picture in the 3D image area, and makes the lens unit 104 refract the picture in the 3D image area with the first linear polarization direction to present a 3D image. Moreover, the switchable polarization device 106 will switch the first linear polarization direction 110a of the picture in the two-dimensional image area to the second linear polarization direction 154, so that the picture in the two-dimensional image area with the second linear polarization direction passes through the lens unit 104 , to render a two-dimensional image. In other embodiments of the present invention, the lens unit can also be used to refract the light with the second linear polarization direction, but not to refract the light with the first linear polarization direction. At this time, the switchable polarization device does not change the two-dimensional image area. The first linear polarization direction of the picture, and the first linear polarization direction of the picture in the three-dimensional image area is switched to the second linear polarization direction.

In this embodiment, the display device 102 includes an OLED display panel 108 and a linear polarizer 110, and the linear polarizer 110 has a first linear polarization direction 110a and covers the display surface 102a of the OLED display panel 108. , so that the picture generated by the OLED display panel 108 can pass through the linear polarizer 110 to have the first linear polarization direction 110a. Moreover, the OLED display panel 108 includes a plurality of pixel units 108 a arranged in an array. When the stereoscopic display device 100 intends to display a picture with a three-dimensional image, the pixel unit 108a used to display the picture in the three-dimensional image area is divided into a right-eye pixel unit 111a and a left-eye pixel unit 111b to display the left-eye image and the right-eye image respectively. image. The display device of the present invention is not limited to using the organic light emitting diode display panel to generate images. In other embodiments of the present invention, the display device may also include a liquid crystal display panel or a self-luminous display panel, such as an organic electroluminescence display device, a plasma (plasma) display device or a field emission display device. Since the images generated by the liquid crystal display panel already have a linear polarization direction, when the display device utilizes the liquid crystal display panel to generate images, the display device may not include a linear polarizer.

In addition, the lens unit 104 includes a birefringent lens 112 and a single refraction lens 114 , and the birefringence lens 112 and the single refraction lens 114 are in direct contact, for example. The birefringent lens 112 has birefringence, which are respectively an ordinary ray refraction index and an extraordinary ray refraction index, and the single refraction lens 114 has a refraction index. That is, when the light rays passing through the birefringent lens 112 have the first linear polarization direction 110a, the birefringent lens 112 has an extraordinary refractive index, and when the light rays passing through the birefringent lens 112 have the second linear polarization direction 154, The birefringent lens 112 has an ordinary refractive index. But the present invention is not limited thereto, and the birefringent lens of the present invention may also have an ordinary refractive index for light with a first linear polarization direction, and an extraordinary refractive index for light with a second linear polarization direction. In addition, the refractive index of the single refraction lens 114 is substantially equal to one of the ordinary light refractive index and the extraordinary light refractive index. In this embodiment, the birefringent lens 112 may be formed of a liquid crystal polymer (LCP) layer, but is not limited thereto. Moreover, the refractive index of the single refraction lens 114 is preferably equal to the ordinary light refraction index of the birefringence lens 112 , but not limited thereto. Furthermore, the single refraction lens 114 of this embodiment is disposed between the switchable polarizer 106 and the birefringence lens 112, and the contact surface of the single refraction lens 114 and the birefringence lens 112 has a plurality of convex mirror surfaces 116, facing the birefringence lens 112 Refractive lens 112 . It can be seen from the above that the light with the first linear polarization direction 110a will have a change in refractive index when passing through the convex mirror surface 116, and is refracted by the convex mirror surface, so the convex mirror surface 116 can be used to connect the left-eye pixel unit 111b and the right-eye pixel unit 111a The resulting light rays are refracted in different directions to display a three-dimensional image. Moreover, the light with the second linear polarization direction will not have a refractive index change when passing through the convex mirror surface 116 , so it will not be refracted by the convex mirror surface 116 and can be used to display a two-dimensional image.

In addition, the stereoscopic display device 100 of this embodiment may further include two adhesive layers 118, respectively disposed between the display device 102 and the switchable polarizer device 106 and between the switchable polarizer device 106 and the lens unit 104, for The switchable polarization device 106 is pasted on the display device 102 , and the lens unit 104 is pasted on the switchable polarization device 106 .

The switchable polarization device of this embodiment will be further described below. Please refer to FIG. 2 and also refer to FIG. 1 . FIG. 2 is a schematic side view of the switchable polarization device according to the first embodiment of the present invention. As shown in FIG. 1 and FIG. 2, the switchable polarizing device 106 of this embodiment includes a first substrate 120, a second substrate 122, a liquid crystal layer 124, a first transparent conductive pattern layer 126, a first insulating layer 128, a second Two transparent conductive pattern layers 130 , a third transparent conductive pattern layer 132 , a second insulating layer 134 and a fourth transparent conductive pattern layer 136 . The first substrate 120 and the second substrate 122 are disposed opposite to each other, and the first substrate 120 is disposed between the second substrate 122 and the display device 102 . The first substrate 120 and the second substrate 122 are transparent substrates such as glass, plastic or quartz, for example. Moreover, the liquid crystal layer 124 is disposed between the first substrate 120 and the second substrate 122, and the liquid crystal molecules 124a of the liquid crystal layer 124 are twisted nematic (twist nematic, TN) liquid crystal, but not limited thereto. In addition, the first transparent conductive pattern layer 126 and the second transparent conductive pattern layer 130 are disposed between the first substrate 120 and the liquid crystal layer 124, and the second transparent conductive pattern layer 130 is disposed between the first transparent conductive pattern layer 126 and the liquid crystal layer. Between 124. The first insulating layer 128 covers the first transparent conductive pattern layer 126 and the first substrate 120, and is located between the first transparent conductive pattern layer 126 and the second transparent conductive pattern layer 130 to electrically insulate the first transparent conductive pattern layer 126 and the second transparent conductive pattern layer 130 . The first transparent conductive pattern layer 126 includes a plurality of first electrode strips 126a arranged in sequence along the first direction 138, and there is a first gap 126b between any two adjacent first electrode strips 126a. The second transparent conductive pattern layer 130 includes a plurality of second electrode strips 130a, arranged in sequence along the first direction 138, and respectively corresponding to each first gap 126b, so that each first electrode strip 126a and each second electrode strip 130a are arranged alternately in sequence along the first direction 138 . In this embodiment, each second electrode strip 130a covers each first gap 126b in a projection direction perpendicular to the first substrate 120, so that the first electrode strip 126a and the second electrode strip 130a are perpendicular to the display device 102. The projection direction covers the entire display surface 102a. Also, the second electrode strips 130a do not overlap with the adjacent first electrode strips 126a, but the present invention is not limited thereto. In other embodiments of the present invention, each second electrode strip may completely cover the first gap and partially overlap with two adjacent first electrode strips located on both sides thereof. Alternatively, each second electrode strip partially overlaps with one of the adjacent first electrode strips located on both sides thereof.

Moreover, the third transparent conductive pattern layer 132 and the fourth transparent conductive pattern layer 136 are disposed between the second substrate 122 and the liquid crystal layer 124, and the fourth transparent conductive pattern layer 136 is disposed between the third transparent conductive pattern layer 132 and the liquid crystal layer. between layers 124 . The second insulating layer 134 covers the third transparent conductive pattern layer 132 and the second substrate 122, and is located between the third transparent conductive pattern layer 132 and the fourth transparent conductive pattern layer 136 to electrically insulate the third transparent conductive pattern layer. layer 132 and a fourth transparent conductive pattern layer 136 . The third transparent conductive pattern layer 132 includes a plurality of third electrode strips 132a arranged along a second direction 140 different from the first direction 138, wherein there is a second gap 132b between any two adjacent third electrode strips 132a . In this embodiment, the first direction 138 and the second direction 140 are perpendicular to each other, but not limited thereto. The fourth transparent conductive pattern layer 136 includes a plurality of fourth electrode strips 136a, arranged in sequence along the second direction 140, and respectively corresponding to the second gaps 132b, so that each third electrode strip 132a and each fourth electrode strip 136a are arranged alternately in sequence along the second direction 140 . In this embodiment, each fourth electrode strip 136a covers each second gap 132b in a projection direction perpendicular to the second substrate 122, so that the third electrode strip 132a and the fourth electrode strip 136a are perpendicular to the projection direction of the display device 102. covering the entire display surface 102a. Also, the fourth electrode strip 136a does not overlap with the adjacent third electrode strip 132a, but is not limited thereto. In other embodiments of the present invention, each fourth electrode strip can also completely cover the second gap and partially overlap with two adjacent third electrode strips located on both sides thereof, or each fourth electrode strip can overlap with two adjacent third electrode strips located on its two sides. One of the adjacent third electrode strips on both sides partially overlaps. In addition, the first transparent conductive pattern layer and the second transparent conductive pattern layer can also be disposed on the second substrate, and the third transparent conductive pattern layer and the fourth transparent conductive pattern layer can also be disposed on the first substrate.

In this embodiment, the switchable polarization device 106 may further include a first alignment film 142 and a second alignment film 144 . The first alignment film 142 is covered on the first insulating layer 128 and the second transparent conductive pattern layer 130, and has the same first alignment direction 142a as the first linear polarization direction 110a, so that the liquid crystal layer 124 is adjacent to the liquid crystal of the first alignment film 142 The long axes of the molecules 124a may be disposed along the first alignment direction 142a. The second alignment film 144 covers the second insulating layer 134 and the fourth transparent conductive pattern layer 136, and has a second alignment direction 144a, so that the long axis of the liquid crystal molecules 124a of the liquid crystal layer 124 adjacent to the second alignment film 144 can be along the The second alignment direction 144a is set. Moreover, the second alignment direction 144a is, for example, perpendicular to the first alignment direction 142a. Thereby, the long axes of the liquid crystal molecules 124a from adjacent to the first alignment film 142 to adjacent to the second alignment film 144 are gradually rotated from the first alignment direction 142a to the second alignment direction 144a. Therefore, when the switchable polarizing device 106 is in the non-energized state, the light with the first linear polarization direction 110a can be changed to the light with the second linear polarization direction when passing through the switchable polarizing device 106, and the second linear polarization direction is the same as the second linear polarization direction. The alignment directions 144a are the same.

The display method and effect of the stereoscopic display device of this embodiment will be further described below. Please refer to Fig. 3 to Fig. 5, Fig. 3 is a schematic diagram of the first picture of two-dimensional and three-dimensional images displayed by the stereoscopic display device of the present invention and the voltage levels input to the switchable polarizing device, and Fig. 4 is a schematic diagram of the display of the stereoscopic display device of the present invention A schematic diagram of the second picture of the two-dimensional and three-dimensional image and the voltage signal input to the switchable polarizing device, and FIG. 5 is the progress of light when the three-dimensional display device according to the first embodiment of the present invention displays the picture of the two-dimensional and three-dimensional image Orientation diagram. As shown in FIG. 3 and FIG. 5 , when the stereoscopic display device 100 sequentially displays the first picture 146 and the second picture 148, it will place each first electrode strip 126a and each second electrode strip 130a along the column direction of the pixel unit 108a. The first row voltage signal C1 and the second row voltage signal C2 are sequentially input respectively, and the first column voltage signal is respectively sequentially input to each third electrode strip 132a and each fourth electrode strip 136a along the row direction of the pixel unit 108a R1 and the second column voltage signal R2. In this embodiment, when the stereoscopic display device 100 intends to display the first picture 146 and the second picture 148 mixed with two-dimensional images and three-dimensional images, the first picture 146 and the second picture 148 have two-dimensional images and three-dimensional images at the same time. The image can therefore be divided into a 2D image area 150 and a 3D image area 152 . When displaying the first frame 146, the pixel unit 108a of the display device 102 corresponding to the three-dimensional image area 152 is divided into a left-eye pixel unit 111b and a right-eye pixel unit 111a, so as to respectively display the left-eye pixel unit with the first linear polarization direction 110a The image and the right-eye image, while the pixel unit 108a corresponding to the two-dimensional image area 150 of the display device 102 normally displays the two-dimensional image with the first linear polarization direction 110a. At this time, the first row voltage signal C1 provides a first voltage level V1, such as a reference voltage, to each of the first electrode strips 126a and each of the second electrode strips 130a overlapping with the 3D image area 152 to be displayed, and provides A second voltage level V2, for example: three times the reference voltage, is applied to each of the first electrode strips 126a and each of the second electrode strips 130a not overlapping with the 3D image area 152, and the first column voltage signal R1 provides the third voltage Level V3, for example: four times the reference voltage, to each third electrode strip 132a and each fourth electrode strip 136a overlapping with the three-dimensional image area 152 to be displayed, and provide a fourth voltage level V4, for example: twice the reference voltage The voltage is applied to each third electrode strip 132 a and each fourth electrode strip 136 a not overlapping with the three-dimensional image area 152 . It can be known that the voltage difference between each first electrode strip 126a and each third electrode strip 132a located in the three-dimensional image area 152, the voltage difference between each first electrode strip 126a and each fourth electrode strip 136a, each The voltage difference between the second electrode strip 130a and each third electrode strip 132a and the voltage difference between each second electrode strip 130a and each fourth electrode strip 136a can be approximately three times the reference voltage, and are located in the three-dimensional image area In the two-dimensional image area 150 other than 152, the voltage difference between each first electrode strip 126a and each third electrode strip 132a, the voltage difference between each first electrode strip 126a and each fourth electrode strip 136a, each The voltage difference between the second electrode strips 130a and each third electrode strip 132a and the voltage difference between each second electrode strip 130a and each fourth electrode strip 136a may roughly be reference voltages. Moreover, the liquid crystal molecules 124a of the liquid crystal layer 124 can be rotated to a threshold voltage of the vertically switchable polarizer 106 that is greater than one reference voltage and less than three times the reference voltage. Therefore, when the voltage difference in the liquid crystal layer 124 is greater than the critical voltage, that is, three times the reference voltage, the liquid crystal molecules 124a of the liquid crystal layer 124 corresponding to the three-dimensional image area 152 will be rotated to be approximately vertical to the switchable polarizer 106, and will not The light with the first linear polarization direction 110a is changed so that the light with the first linear polarization direction 110a is refracted by the lens unit 104 to present a three-dimensional image. When the voltage difference in the liquid crystal layer 124 is less than the threshold voltage, that is, the reference voltage, the liquid crystal molecules 124a of the liquid crystal layer 124 corresponding to the two-dimensional image area 150 will not be rotated, so that the switchable polarization device 106 will have the first linear polarization The light in the direction 110 a is changed to the light with the second linear polarization direction 154 , so it is not refracted by the lens unit 104 and can present a two-dimensional image.

As shown in FIG. 4 and FIG. 5, when the second frame 148 is displayed, the first row voltage signal C2 provides a third voltage level V3, for example: four times the reference voltage, to each of the overlapping three-dimensional image areas 152 to be displayed. The first electrode strip 126a and each second electrode strip 130a, and provide a fourth voltage level V4, for example: twice the reference voltage, to each first electrode strip 126a and each second electrode that does not overlap with the three-dimensional image area 152 130a, and the first column voltage signal R2 provides a first voltage level V1, for example: a reference voltage, to each third electrode strip 132a and each fourth electrode strip 136a overlapping with the three-dimensional image area 152 to be displayed, and provides The second voltage level V2 , for example: three times the reference voltage, is applied to each third electrode strip 132 a and each fourth electrode strip 136 a not overlapping with the 3D image area 152 . It can be known that the voltage difference between each first electrode strip 126a and each third electrode strip 132a located in the three-dimensional image area 152, the voltage difference between each first electrode strip 126a and each fourth electrode strip 136a, each The voltage difference between the second electrode strip 130a and each third electrode strip 132a and the voltage difference between each second electrode strip 130a and each fourth electrode strip 136a are still three times the reference voltage and greater than the threshold voltage, so that there is The light in the first linear polarization direction 110a will not change, thus presenting a three-dimensional image. In the two-dimensional image area 150 outside the three-dimensional image area 152, the voltage difference between each first electrode strip 126a and each third electrode strip 132a, the voltage difference between each first electrode strip 126a and each fourth electrode strip 136a The voltage difference, the voltage difference between each second electrode strip 130a and each third electrode strip 132a, and the voltage difference between each second electrode strip 130a and each fourth electrode strip 136a are still reference voltages and are less than the critical voltage, Thus, the light with the first linear polarization direction 110a will be changed into the light with the second linear polarization direction 154, thereby presenting a two-dimensional image. It should be noted that the electric field that drives the liquid crystal layer when displaying the second picture 148 is opposite to the electric field that drives the liquid crystal layer when displaying the first picture 146, that is, this embodiment provides the first row voltage signal C1 and the first column voltage signal R1 , The second row voltage signal C2 and the second column voltage signal R2 are sent to the switchable polarizer 106 to drive the switchable polarizer 106 in a polarity inversion manner, thereby avoiding DC residual phenomenon in the liquid crystal layer. In other embodiments of the present invention, the stereoscopic display device 100 may also display the second frame 148 first, and then display the first frame 146 .

It should be noted that since the first electrode strips 126a and the second electrode strips 130a in this embodiment cover the entire display surface 102a in the projection direction perpendicular to the display device 102, and the third electrode strips 132a and the fourth electrode strips 136a are perpendicular to The projection direction of the display device 102 covers the entire display surface 102a, so the light generated by the display device 102 will pass through at least one of the first transparent conductive pattern layer 126 and the second transparent conductive pattern layer 130 and the third transparent conductive pattern layer 132 and at least one of the fourth transparent conductive pattern layer 136 , so that the light generated by each pixel unit 108 a can have approximately equal optical paths when passing through the switchable polarizing device 106 . That is, the optical path difference of the light generated by the pixel unit 108a may be approximately zero, thereby avoiding the occurrence of moiré fringes caused by the difference in the optical path of the pixels. Moreover, the first electrode strips 126a and the second electrode strips 130a cover the entire display surface 102a, and the third electrode strips 132a and the fourth electrode strips 136a cover the entire display surface 102a, so that any liquid crystal molecules in the liquid crystal layer can be applied The voltage difference between one of the first transparent conductive pattern layer 126 and the second transparent conductive pattern layer 130 and one of the third transparent conductive pattern layer 132 and the fourth transparent conductive pattern layer 136 is rotated. In this way, the first linear polarization direction 110a of the image in the 3D image area 152 can avoid displaying a 2D image due to being changed to the second linear polarization direction 154 by the liquid crystal molecules 124a not rotated by the voltage difference.

The switchable polarizing device and lens unit of the present invention are not limited to the above-mentioned embodiments. The following will continue to disclose other embodiments or variants of the present invention. However, in order to simplify the description and highlight the differences between the embodiments or variants, the same reference numerals are used to mark the same components, and the repetitive parts will not be repeated.

Please refer to FIG. 6 , which is a schematic cross-sectional view of a switchable polarization device according to a second embodiment of the present invention. As shown in FIG. 6, compared with the first embodiment, each second electrode strip 130a of the switchable polarizing device 156 of this embodiment partially overlaps with the adjacent first electrode strips 126a on both sides thereof, without The first electrode strip 126a is completely covered. Moreover, the first insulating layer 128 has a plurality of first through holes 128a, and the first through holes 128a are located between the overlapping parts of each first electrode strip 126a and each second electrode strip 130a, so that each first electrode strip 126a respectively passes through the first through holes 128a is electrically connected to each adjacent second electrode strip 130a located on one side thereof. Furthermore, each fourth electrode strip 136a partially overlaps the adjacent third electrode strips 132a located on two sides thereof, but does not completely cover the third electrode strip 132a. Moreover, the second insulating layer 134 has a plurality of second through holes 134a, and the second through holes 134a are located between the overlapping parts of each third electrode strip 132a and each fourth electrode strip 136a, so that each third electrode strip 132a respectively passes through the second through holes 134a is electrically connected to each adjacent fourth electrode strip 136a located on one side thereof. In other embodiments of the present invention, each first electrode strip may only partially overlap with the adjacent second electrode strip located on one side, and only partially overlap with the side edge of the adjacent second electrode strip on the other side. Qie Qi. Moreover, each third electrode strip may only partially overlap the adjacent fourth electrode strip located on one side thereof, and only be aligned with the side edge of the other adjacent fourth electrode strip.

Please refer to FIG. 7 , which is a schematic cross-sectional view of a switchable polarization device according to a third embodiment of the present invention. As shown in FIG. 7 , compared with the first embodiment, the switchable polarizing device 158 of this embodiment may not be provided with a fourth transparent conductive pattern layer, and is not provided with a second insulating layer. Moreover, the second alignment film 144 directly covers the third transparent conductive pattern layer 132 . In other embodiments of the present invention, the first transparent conductive pattern layer and the second transparent conductive pattern layer can also be disposed on the second substrate, and the third transparent conductive pattern layer can also be disposed on the first substrate.

Please refer to FIG. 8 , which is a schematic cross-sectional view of a stereoscopic display device according to a fourth embodiment of the present invention. As shown in FIG. 8 , compared with the first embodiment, the birefringent lens 112 of the lens unit 202 of the stereoscopic display device 200 of this embodiment is arranged between the switchable polarizing device 106 and the single refraction lens 114, and the birefringence The convex mirror surface 116 of the lens 112 in contact with the single refraction lens 114 faces the single refraction lens 114 .

To sum up, the present invention utilizes a switchable polarizer and a lens unit together with a display device capable of displaying pixels with a linear polarization direction to provide a stereoscopic display device capable of displaying pictures mixed with two-dimensional and three-dimensional images, so as to avoid being limited Because it can only switch between two-dimensional pictures and three-dimensional pictures, so the present invention not only provides a three-dimensional display device for switching two-dimensional and three-dimensional picture pictures, but also provides a three-dimensional display for displaying pictures with two-dimensional and three-dimensional pictures at the same time. device. Moreover, the present invention arranges first electrode strips and second electrode strips that can cover the entire display surface on the first substrate of the switchable polarization device or/and arranges a third electrode that can cover the entire display surface on the second substrate The strip and the fourth electrode strip are used to reduce the optical path difference generated by different light rays passing through the switchable polarizing device, thereby avoiding the generation of moiré fringes. Moreover, when the first electrode strips and the second electrode strips covering the entire display surface are provided on the first substrate, and the third electrode strips and the fourth electrode strips covering the entire display surface are provided on the second substrate, the liquid crystal layer Any of the liquid crystal molecules can even be rotated by a voltage difference applied between one of the first transparent conductive pattern layer and the second transparent conductive pattern layer and one of the third transparent conductive pattern layer and the fourth transparent conductive pattern layer . Therefore, the first linear polarization direction of the picture in the three-dimensional image area can be prevented from being changed to the second linear polarization direction by the liquid crystal molecules not rotated by the voltage difference, thereby displaying a two-dimensional image.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the present invention.

Claims (14)

1. 3 d display device that can show two dimension and the picture of 3-D view includes:

One display device has a display surface, and this display surface is used for showing the picture with a linear polarization;

One lens unit is arranged on this display surface of this display device; And

One switchable polarization electro-optical device be arranged between this display device and this lens unit, and changeable polarizing appliance includes:

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;

One first transparent conductive patterns layer is arranged between this first substrate and this liquid crystal layer, and includes a plurality of the first electrode strips, wherein has one first gap between wantonly two adjacent described the first electrode strips;

One second transparent conductive patterns layer, be arranged between this first transparent conductive patterns layer and this liquid crystal layer, this the second transparent conductive patterns layer includes a plurality of the second electrode strips, and respectively this second electrode strip is respectively at covering this first gap on the projecting direction of vertical this first substrate, wherein respectively this first electrode strip and this second electrode strip respectively along first direction alternative arrangement sequentially; And

One the 3rd transparent conductive patterns layer is arranged between this second substrate and this liquid crystal layer, and includes a plurality of third electrode bars.

2. the 3 d display device that shows two dimension and the picture of 3-D view as claimed in claim 1, wherein respectively this first electrode strip be positioned at its both sides and adjacent described the second electrode strip wherein at least one is overlapping.

3. the 3 d display device that shows two dimension and the picture of 3-D view as claimed in claim 1, wherein respectively this first electrode strip respectively be positioned at one side and adjacent respectively this second electrode strip and be electrically connected.

4. the 3 d display device that shows the picture of two dimension and 3-D view as claimed in claim 1 also includes one first insulation course, is arranged between this first transparent conductive patterns layer and this second transparent conductive patterns layer.

5. the 3 d display device that shows two dimension and the picture of 3-D view as claimed in claim 4, wherein be electrically insulated this first transparent conductive patterns layer and this second transparent conductive patterns layer of this first insulation course.

6. the 3 d display device that shows two dimension and the picture of 3-D view as claimed in claim 1 wherein has one second gap between the wantonly two adjacent described third electrode bars.

7. the 3 d display device that shows two dimension and the picture of 3-D view as claimed in claim 6, also include one the 4th transparent conductive patterns layer, be arranged between the 3rd transparent conductive patterns layer and this liquid crystal layer, and include a plurality of the 4th electrode strips, and respectively the 4th electrode strip is respectively at covering this second gap on this projecting direction of vertical this first substrate, make described third electrode bar and described the 4th electrode strip cover whole this display surface, wherein respectively this third electrode bar and the 4th electrode strip respectively along a second direction of different these first directions alternative arrangement sequentially.

8. the 3 d display device that shows two dimension and the picture of 3-D view as claimed in claim 7, wherein respectively this third electrode bar be positioned at its both sides and adjacent described the 4th electrode strip wherein at least one is overlapping.

9. the 3 d display device that shows two dimension and the picture of 3-D view as claimed in claim 7, wherein respectively this third electrode bar respectively be positioned at one side and adjacent respectively the 4th electrode strip and be electrically connected.

10. the 3 d display device that shows the picture of two dimension and 3-D view as claimed in claim 7 also includes one second insulation course, is arranged between the 3rd transparent conductive patterns layer and the 4th transparent conductive patterns layer.

11. the 3 d display device that shows two dimension and the picture of 3-D view as claimed in claim 10, wherein be electrically insulated the 3rd transparent conductive patterns layer and the 4th transparent conductive patterns layer of this second insulation course.

12. the 3 d display device that shows the picture of two dimension and 3-D view as claimed in claim 1, wherein this lens unit comprises a birefringent lens and single refraction lens, this birefringent lens directly contacts with these single refraction lens, this birefringent lens has an ordinary refraction index and an extraordinary ray refractive index, these single refraction lens have a refractive index, and this refractive index of these single refraction lens equates with one of them of this ordinary refraction index and this extraordinary ray refractive index substantially.

13. the 3 d display device that shows the picture of two dimension and 3-D view as claimed in claim 12, wherein these single refraction lens are arranged between this switchable polarization electro-optical device and this birefringent lens, and these single refraction lens and the contacted surface of this birefringent lens have a plurality of convex lens faces.

14. the 3 d display device that shows the picture of two dimension and 3-D view as claimed in claim 12, wherein this birefringent lens is arranged between this switchable polarization electro-optical device and this single refraction lens, and this birefringent lens and this contacted surface of single refraction lens have a plurality of convex lens faces.

Images