TWI386035B - Three-dimensional display device and three-dimensional display method - Google Patents

Description

Stereoscopic display device and stereoscopic display method

The present invention relates to a stereoscopic display device and method, and more particularly to a stereoscopic display device and method that can be viewed with the naked eye.

In recent years, with the rapid development of consumer electronic products, various digital electronic display devices have become popular, and various new products can be seen on mobile phones, interactive advertising versions, LCD TVs, and notebook computers. Electronic display device. In order to achieve a more realistic display effect, electronic displays have evolved from the current flat display to the goal of stereoscopic display.

Taking the current stereoscopic movie as an example, the viewer wears stereo glasses with red and blue filters. The picture of the movie contains the left eye image and the right eye image composed of different color lights, and the left and right eye images are filtered by different filters and then projected to the eyes of the viewer respectively. The difference in depth of field between the left-eye image and the right-eye image allows the viewer to see objects with stereoscopic depth effects. At present, such stereoscopic film technology is very mature, and the problem of color deviation has been gradually solved. However, when watching such a movie, viewers still need to wear special stereo glasses. If you take down the glasses, you will only see two groups. Overlapping and blurred images.

With the popularity of liquid crystal displays, the industry has gradually begun to develop naked-eye stereoscopic display technology. The main display technologies are divided into Slanted Lenticular Lens and Parallel Barrier. The principle is to use specific optical components (such as cylindrical lenticular lens array and solid grating) as the parallax module and display panel. The image images of the left and right eyes are simultaneously displayed in different regions. Under the light guiding guidance of the parallax module, the image images of the left and right eyes of different regions on the display panel are respectively projected to different imaging regions, thereby respectively entering the viewer. The left and right eyes achieve stereoscopic effects.

Please refer to FIG. 1 . FIG. 1 is a schematic diagram of a stereoscopic display device 1 in the prior art. The stereoscopic display device 1 includes a display panel 10 and a parallax module 12 . As shown in FIG. 1, the display panel 10 is divided into a first area 10R and a second area 10L. In this example, the first region 10R may be an even row of scan lines, and the second region 10L may be an odd row of scan lines. The first region 10R and the second region 10L on the display panel 10 respectively display the right-eye view image and the left-eye view image, and after passing through the parallax module 12, the right-eye imaging region 2R and the left-eye imaging respectively imaged outside the specific viewing distance. Area 2L. Thereby, the viewer can see the stereoscopic image with the naked eye.

However, in the above-described conventional naked-eye stereoscopic display technology, the display panel is fixed with a 1/2 area (even-row scan line) to display the right-eye picture, and the other 1/2 area (odd-row scan line) displays the left-eye picture. In this way, although the effect of the stereoscopic image can be achieved, the original left and right eye images can only be presented with half of the resolution, so that the fineness of the image presentation is greatly limited.

The invention provides a stereoscopic display device and a stereoscopic display method which can be viewed by the naked eye, which can display the full-resolution left and right eye images to achieve a better stereoscopic display effect, so as to solve the above problems.

One aspect of the present invention is to provide a stereoscopic display device.

According to an embodiment, the stereoscopic display device comprises a display panel, a parallax module, a polarization control module, and a birefringent layer. The display panel includes a first area and a second area. The display panel interleaves a right eye view image and a left eye view image to generate an optical signal according to a frequency. The parallax module is configured to split the optical signal to cause the first area and the second area to be displayed on the left and right eyes of the viewer. The polarization control module is disposed between the display panel and the parallax module, and the polarization control module switches a polarization direction of the optical signal passing through the polarization control module according to the frequency. The birefringent layer translates the optical signal by a specific distance or directly through the polarization direction.

Another aspect of the present invention is to provide a stereoscopic display method.

According to an embodiment, the stereoscopic display method includes the steps of: displaying a right-eye view image and a left-eye view image on a first region and a second region of a display panel according to a frequency, thereby generating an optical signal; The optical signal causes the first area and the second area to be respectively projected on the left and right eyes of the viewer; the polarization direction of the optical signal is controlled according to the frequency; and the optical signal is translated or directly passed according to the polarization direction. A birefringent layer forms a stereoscopic image.

In the stereoscopic display device and the stereoscopic display method of the present invention, the first region (such as an even number of scanning lines) and the second region (such as an odd number of scanning lines) included in the screen are alternated at a higher frequency (eg, 120 Hz). The right eye view screen and the left eye view screen are displayed. By controlling the polarization direction of the optical signal, the optical signal is selectively translated when passing through the birefringent layer, thereby compensating for the positional deviation between the left and right eye viewing angle images, so that the left and right eye viewing angle images can be stably imaged. In the corresponding left and right eye imaging areas. In this way, the stereoscopic display effect can be achieved without degrading the image resolution.

The advantages and spirit of the present invention will be further understood from the following detailed description of the invention.

Referring to FIG. 2, FIG. 2 is a schematic diagram of a stereoscopic display device 3 according to an embodiment of the present invention. As shown in FIG. 2 , the naked eye stereoscopic display device 3 includes a display panel 30 , a polarization control module 32 , a parallax module 34 , and a birefringent layer 36 .

In a practical application, the display panel 30 can include a backlight module and a liquid crystal display module. The liquid crystal display module of the display panel 30 can display the image according to the input screen information, and display the liquid crystal display module by using the light generated by the backlight module. The screen is projected, and the display principle of the liquid crystal display panel is well known to those skilled in the art. Briefly, the display panel 30 can be used to display a picture and generate an optical signal based on the picture.

In this embodiment, the display panel 30 includes a first area 300 and a second area 302. In this embodiment, the first area 300 is an even number of scan lines on the display panel 30, and the second area 302 is an odd number of scan lines on the display panel 30. In the present invention, the first region 300 and the second region 302 alternately display a right-eye view screen and a left-eye view screen.

For example, at time point 2t, the first area 300 displays the pixel information of the even-numbered scan lines in the right-eye view picture, and at the same time, the second area 302 displays the pixel information of the odd-numbered scan lines in the left-eye view picture. At the next time point 2t+1, the first area 300 is switched to display the pixel information of the even-numbered scan lines in the left-eye view picture, and the second area 302 displays the pixel information of the odd-numbered scan lines in the right-eye view picture. .

For the right-eye view picture, the pixel information of the even-numbered scan lines and the odd-numbered scan lines are displayed on the display panel 30 at the time point 2t and the time point 2t+1, that is, for the right-eye view picture, The full resolution of the image can be displayed in a time-sharing manner without any omissions. Similarly, for the left-eye view picture, the pixel information of the odd-numbered scan lines and the even-numbered scan lines are also displayed on the display panel 30 at the time point 2t and the time point 2t+1, respectively.

In addition, in this embodiment, the display panel 30 can adopt a screen switching frequency of 120 Hz or more, so that the first region 300 and the second region 302 alternately display the right-eye view image and the left-eye view image, thus, for a single In terms of the right-eye (or left-eye) viewing angle, the screen switching frequency is still above 60 Hz, and the screen switching is very smooth for human vision.

In the above, the optical signal generated by the display panel 30 is then split by the parallax module 34 and imaged in an imaging area of a specific viewing distance. In this embodiment, the parallax module 34 can be a solid grating, a plano-convex lens array or a lenticular lens array. In the second embodiment, a plano-convex lens array is taken as an example, but the invention is not limited thereto. The parallax barrier module 34 is configured to limit the travel path and direction of the optical signals on the display panel 30 by using the parallax barrier effect of the solid grating sheet, or to make the left and right eyes of different regions on the display panel 30 The image frames are respectively imaged in specific areas (such as the right eye imaging area 40 and the left eye imaging area 42 in FIG. 2), thereby allowing them to enter the left and right eyes of the viewer, respectively, to form a stereoscopic effect.

It should be noted that, in the stereoscopic display device 3 of the present invention, the first region and the second region included in the display panel 30 alternately display the right-eye view screen and the left-eye view screen, so the stereoscopic display device 3 is additionally provided with polarization. The control module 32 and the birefringent layer 36 are used to compensate for the positional deviation between the left and right eye viewing angle images, so that the left and right eye viewing angle images can be stably imaged in the corresponding left and right eye imaging regions, and the detailed method is performed. Details are given in the following paragraphs.

Referring to FIG. 3 together, FIG. 3 is a flowchart of a method for displaying a stereoscopic display according to an embodiment of the present invention. The stereoscopic display method in this embodiment can be used in conjunction with the stereoscopic display device 3, or can also operate independently.

First, step S100 is executed to display a screen according to a frequency on the display panel 30 to generate an optical signal. As shown in FIG. 2, the first area 300 and the second area 302 of the display panel 30 alternately display the right-eye view and the left. Eye angle picture.

In step S102, the optical signal generated by the display panel 30 passes through the parallax module 34, and the optical signal is split to cause the first region 300 and the second region 302 to be projected on the left and right eyes of the viewer.

Step S104 is executed to control the polarization direction of the optical signal according to the frequency of the display screen by the polarization control module 32.

In this embodiment, the polarization control module 32 can include a liquid crystal layer. The polarization control module 32 controls the alignment direction of the liquid crystal grains in the liquid crystal layer by using a driving voltage, thereby adjusting the polarization direction of the optical signal.

Please refer to FIG. 4A and FIG. 4B together. FIG. 4A and FIG. 4B respectively illustrate a schematic diagram of controlling the polarization direction of the optical signal to the fundamental frequency or the frequency doubled light by using the polarization control module 32. As shown in FIG. 4A, the liquid crystal layer liquid crystal alignment direction of the polarization control module 32 is parallel to the incident light, so that the polarization direction of the optical signal is maintained in the direction of the ordinary ray (o-ray). In FIG. 4B, the polarization control module 32 applies a driving voltage to reverse the alignment direction of the liquid crystal crystal grains in the liquid crystal layer, thereby adjusting the polarization direction of the passing optical signal to an extraordinary ray (e-ray). direction.

Step 106 is performed to translate the optical signal or directly pass through the birefringent layer according to the polarization direction.

Please refer to FIG. 5 together. FIG. 5 is a schematic diagram showing the traveling path of the optical signal whose polarization direction is in the fundamental light (o-ray) direction after entering the birefringent layer 36. As shown in FIG. 5, when the optical signal whose polarization direction is in the o-ray direction enters the birefringent layer 36, the optical signal can directly pass through the birefringent layer.

Referring to FIG. 2 together, the polarization control module 32 controls the polarization direction of the optical signal in the o-ray direction. The optical signal having the polarization direction of the o-ray direction can directly pass through the birefringent layer 36 and form a stereoscopic image, and the stereoscopic imaging includes the right eye imaging region 40 and the left eye imaging region 42 simultaneously displayed by the first region 300 and the second region 302.

That is, in the case where the optical signal travels straight, the first area 300 displays the even-numbered scan line portions in the right-eye view picture and is projected to the right-eye imaging area 40; the second area 302 displays the left-eye view picture. The odd-numbered scan lines are projected to the left-eye imaging area 42.

Similarly, when the first area 300 of the display panel is switched to display the left-eye view screen, and the second area 302 is switched to display the right-eye view picture, the first area 300 displays the even-numbered scan lines in the left-eye view picture, The second area 302 displays the odd-numbered scan line portions in the right-eye view picture. In this way, the complete resolution of the left and right eye viewing angle images can be completely displayed, and is no longer limited to the display effect of only half resolution of the left and right eye viewing angles.

On the other hand, please refer to FIG. 6. FIG. 6 is a schematic diagram showing the traveling path of the optical signal whose polarization direction is in the e-ray direction after entering the birefringent layer 36. When the optical signal having the polarization direction of the e-ray direction enters the birefringent layer 36, the optical signal will be translated by a specific distance d. At this time, the specific distance d of the optical signal translation may be affected by the incident angle, the thickness of the birefringent layer 36, and the birefringence. The layer 36 itself is affected by the material. In this embodiment, the birefringent layer 36 can be made of various materials having birefringence characteristics, such as liquid crystal.

Referring to FIG. 6 , when the polarization control module 32 adjusts the polarization direction of the optical signal to the e-ray direction, the polarization direction is adjusted to a specific distance d when the optical signal in the e-ray direction passes through the birefringent layer 36 . By designing a suitable specific distance d, the left-eye view picture of the first area 300 is translated into the left-eye imaging area 42 after translation, and the right-eye view picture of the second area 302 is translated and projected into the right-eye imaging area 40. .

In this way, the polarization direction of the optical signal can be adjusted to the e-ray direction through the polarization control module 32, so that the optical signal is translated when passing through the birefringent layer, and the left and right eyes are interchanged with the appropriate specific distance. The positional deviation generated at the time enables the left and right eye viewing angle images to be stably imaged in the corresponding left and right eye imaging regions.

In the stereoscopic display device and the stereoscopic display method of the present invention, the first region (such as an even number of scanning lines) and the second region (such as an odd number of scanning lines) on the display panel are alternated at a higher frequency (eg, 120 Hz). The right eye view screen and the left eye view screen are displayed. By controlling the polarization direction of the optical signal, the optical signal is selectively translated when passing through the birefringent layer, thereby compensating for the positional deviation between the left and right eye viewing angle images, so that the left and right eye viewing angle images can be stably imaged. In the corresponding left and right eye imaging areas. In this way, the stereoscopic display effect can be achieved without degrading the image resolution.

The features and spirit of the present invention will be more apparent from the detailed description of the preferred embodiments. On the contrary, the intention is to cover various modifications and equivalents within the scope of the invention as claimed.

1, 3. . . Stereoscopic display device

10, 30. . . Display panel

10R, 300. . . First area

10L, 302. . . Second area

12, 34. . . Parallax module

2R, 40. . . Right eye imaging area

2L, 42. . . Left eye imaging area

32. . . Polarization control module

36. . . Birefringent layer

d. . . Specific distance

S100~S106. . . step

FIG. 1 is a schematic diagram of a stereoscopic display device in the prior art.

2 is a schematic diagram of a stereoscopic display device in accordance with an embodiment of the present invention.

3 is a flow chart of a method of a stereoscopic display method in accordance with an embodiment of the present invention.

FIG. 4A is a schematic diagram of controlling a polarization direction of the optical signal to a fundamental frequency light direction by using a polarization control module.

FIG. 4B is a schematic diagram of controlling the polarization direction of the optical signal to the frequency of the frequency doubled by using the polarization control module.

FIG. 5 is a schematic diagram showing the traveling path of the optical signal whose polarization direction is the fundamental frequency light direction after entering the birefringent layer.

FIG. 6 is a schematic diagram showing the traveling path of the optical signal whose polarization direction is the frequency-doubled light direction after entering the birefringent layer.

3. . . Stereoscopic display device

30. . . Display panel

300. . . First area

302. . . Second area

32. . . Polarization control module

34. . . Parallax module

36. . . Birefringent layer

40. . . Right eye imaging area

42. . . Left eye imaging area

Claims (13)

A stereoscopic display device includes: a display panel, the display panel includes a first area and a second area, and the display panel alternately displays a right eye view image and the second area according to a frequency a left-eye view image is used to generate an optical signal; a parallax module is configured to split the optical signal to cause the first region and the second region to be displayed on the left and right eyes of the viewer; a polarization control module, Between the display panel and the parallax module, switching a polarization direction of the optical signal passing through the polarization control module according to the frequency; and a birefringent layer, the birefringent layer is configured to the optical signal according to the polarization direction Translating a specific distance or directly passing through, wherein when the first area displays the right eye view picture and the second area displays the left eye view picture, the optical signal directly passes through the birefringent layer and forms a stereoscopic image. The stereoscopic imaging includes a right eye imaging area and a left eye imaging area. The stereoscopic display device of claim 1, wherein the polarization control module comprises a liquid crystal layer, wherein the polarization control module controls a direction of arrangement of the plurality of liquid crystals in the liquid crystal layer by using a driving voltage, thereby adjusting the alignment The polarization direction of the optical signal. The stereoscopic display device of claim 1, wherein if the optical signal entering the birefringent layer has a polarization direction of a fundamental frequency, the optical signal directly passes through the birefringent layer. The stereoscopic display device of claim 1, wherein if the optical signal entering the birefringent layer has a polarization direction of a double frequency, when the optical signal passes through the birefringent layer, The optical signal translates the specific distance. The stereoscopic display device of claim 1, wherein the polarization control module adjusts the optical signal when the first region displays the left eye viewing angle image and the second region displays the right eye viewing angle image Polarizing direction, the optical signal is translated to the specific distance when passing through the birefringent layer, and the left-eye viewing angle image of the first region is translated into the left-eye imaging region by the specific distance, and the first The right eye view image of the two regions is translated into the right eye imaging region after translation. The stereoscopic display device of claim 1, wherein the display panel comprises a backlight module and a liquid crystal display module. The stereoscopic display device of claim 1, wherein the frequency is 120 Hz or more. The stereoscopic display device of claim 1, wherein the parallax module is a solid grating or a convex lens array. A stereoscopic display method, the method includes the following steps: interlacing a right eye view image and a left eye view image on a first area and a second area of a display panel according to a frequency, thereby generating an optical signal; Splitting the optical signal causes the first area and the second area to be displayed on the left and right eyes of the viewer respectively; Controlling, according to the frequency, a polarization direction of the optical signal; and translating or directly passing the optical signal according to the polarization direction, wherein the first area displays the right eye view picture and the second area displays the In the left-eye view screen, the polarization direction of the optical signal is controlled in a fundamental light direction, and the optical signal directly forms stereoscopic imaging through the birefringent layer, and the stereoscopic image includes a right eye imaging region corresponding to one of the first regions. And a left eye imaging area of the second area. The stereoscopic display method of claim 9, wherein if the optical signal entering the birefringent layer has a polarization direction of a fundamental frequency, the optical signal directly passes through the birefringent layer. The stereoscopic display method of claim 9, wherein if the optical signal entering the birefringent layer has a polarization direction of a double frequency, when the optical signal passes through the birefringent layer, The optical signal is translated by a specific distance. The stereoscopic display method of claim 9, wherein when the first area displays the left-eye view screen and the second area displays the right-eye view picture, the polarization direction of the optical signal is adjusted to one In the direction of the frequency doubling light, the adjusted optical signal is translated by the specific distance by the birefringent layer, and the left eye angle of view image of the first area is translated and projected into the left eye of the stereoscopic image by the specific distance Imaging the region, and causing the right eye view image of the second region to be projected into the right eye imaging region of the stereoscopic image. The stereoscopic display method of claim 9, wherein the frequency is 120 Hz or more.