TWI420150B - Stereoscopic image display - Google Patents

Description

Display device for displaying three-dimensional images

The present invention relates to a stereoscopic image display device, and more particularly to a time-series stereoscopic image display device.

Human beings perceive real-world images through the prospects seen by both eyes. The human brain further forms a so-called 3D (3-dimension) image based on the spatial distance difference between the two different perspectives seen by both eyes. The so-called 3D display device is a display device that simulates the field of view of different angles of human eyes, and enables the user to perceive as a 3D image when viewing a 2D display image.

The current 3D display devices are mainly divided into two categories, namely, an auto-stereoscopic display device and a non-automatic stereoscopic display device (Stereoscopic display). The user of the autostereoscopic image display device can see the 3D stereoscopic image without wearing the special structure glasses. Another non-automatic stereoscopic image display device requires the user to wear special glasses to see the 3D stereoscopic image. When wearing special-structured glasses to selectively receive stereoscopic images, the viewer will be able to feel the stereoscopic image. It is known that the left and right eyes actually receive different images separately, and the viewer perceives the stereoscopic image by analyzing the image in the brain. According to the above description, the elements that can recognize the three-dimensional space are based on the images of the left and right eyes. Therefore, two images are needed to implement the stereo image. Therefore, a stereoscopic image is obtained when the image is captured by at least two stereoscopic cameras, and then the image is separated and transmitted to the display. When the display image is switched with the glasses and the shutter, the viewer wears the glasses to view the selected images by the left and right eyes, respectively, so that the stereo image is perceived.

The conventional glasses-type non-stereoscopic display device has a small vertical viewing angle and a half of the resolution. In order to improve this problem, the manufacturer will add a patterned ITO layer as a shutter for synchronizing with the original display panel for phase rotation to achieve the advantage that the resolution will not fall. The pattern on the patterned conductive electrode layer is generally stripe-like, and the interval between the stripes is set corresponding to the arrangement of the left-eye pixel and the right-eye pixel. Therefore, the stripes of the patterned conductive electrode layer need to be displayed. The panel is precisely aligned. Moreover, in the process of fabricating the patterned conductive electrode layer, a yellow light process is required to define a stripe pattern. However, such a stereoscopic display device still has a problem of a small vertical viewing angle.

In view of the above, the main object of the present invention is to provide a stereoscopic display device for displaying a three-dimensional image, comprising a display unit area, a TN unit layer and a quarter-wavelength plate, which are synchronized by the display unit area and the TN unit layer. The light passes through the TN unit layer and passes through the quarter-wavelength sheet to alternately generate left-handed circularly polarized light and right-handed circularly polarized light. The observer can perceive the stereoscopic image by wearing the pair of glasses and the pair of glasses having different polarization directions.

In order to achieve the above object, the present invention provides a display device for displaying a three-dimensional image, comprising a first light source group for generating a first light when receiving a first start signal, and a second light source group for When receiving a second activation signal, generating a second light; a display unit area including a first display area and a second display area for receiving a first data voltage signal or a second When the data voltage signal is used, the image is displayed according to the first light or the second light; a TN unit layer is used to open when receiving a switching signal; and a quarter-wavelength plate, the optical axis and the second polarized light The angle of the absorption axis of the sheet is 45 degrees.

According to an embodiment of the present invention, when the first display area and the second display area receive the first data voltage signal, the third display area receives the second data voltage signal, and the TN unit layer receives the switching signal When the first light source group receives the first start signal to generate the first light, the first display area and the second display area display an image according to the first light, and when the first display area receives the first The data voltage signal, the second display area and the third display area receive the first data voltage signal, the TN unit layer receives the switching signal, and the second light source group receives the second activation signal to generate the The second display area and the third display area display images according to the second light, when the first display area and the second display area receive the second data voltage signal, and the third display area receives The first display voltage signal, the TN unit layer is not received by the switching signal, and the first light source group receives the first activation signal to generate the first light, the first display area and the first display area The second display area displays the image according to the first light, and when the first display area receives the first data voltage signal, the second display area, and the third display area receives the second data voltage signal, the TN unit layer does not receive When the switch signal is turned off and the second light source group receives the second start signal to generate the second light, the second display area and the third display area display an image according to the second light.

According to an embodiment of the invention, the display device further includes a first polarizer and a second polarizer. The first polarizer is configured to output a first light or a second light having a first polarization direction. The second polarizer is configured to change a polarization of the first light or the second light from the first polarizer to a second polarization direction different from the first polarization direction. Wherein the first is substantially perpendicular to the second polarization direction.

The present invention further provides a display device for displaying a three-dimensional image, comprising a backlight module for generating a light; a first polarizer for transmitting light having a first polarization direction; and a display unit region for When receiving a first data voltage signal or a second data voltage signal, displaying an image according to the light; and a second polarizer for using the first light or the second light from the first polarizer The polarization is changed to a second polarization direction different from the first polarization direction; a TN unit layer is used to open when receiving a switching signal; and a quarter-wavelength plate has an optical axis The angle of the absorption axis of the second polarizer is 45 degrees.

According to an embodiment of the invention, the display device repeatedly displays the image according to the following steps: (a) the display unit area receives the second data voltage signal, the TN unit layer does not receive the switching signal, and the backlight module is turned off. When the group generates the light, the display unit area displays the image according to the second data voltage signal and the light; (b) the display unit area receives a black insertion signal, the TN unit layer does not receive the switching signal, and the When the backlight module generates the light, the display unit area displays the image according to the black insertion signal; (c) the display unit area receives the first data voltage signal, the TN unit layer receives the switching signal, and the backlight module is turned on. When the group generates the light, the display unit area displays the image according to the first data voltage signal and the light; and (d) the display unit area receives the black insertion signal, the TN unit layer receives the switching signal, and the When the backlight module generates the light, the display unit area displays an image according to the black insertion signal.

According to another embodiment of the present invention, the display device repeatedly displays the image according to the following steps: (a) the display unit area receives the second data voltage signal, the TN unit layer does not receive the switching signal, and the backlight is turned off. When the module generates the light, the display unit area displays the image according to the second data voltage signal and the light; (b) the display unit area receives the second data voltage signal, and the TN unit layer does not receive the switch signal; When the backlight module does not generate the light, the display unit area does not present an image; (c) the display unit area receives the first data voltage signal, the TN unit layer receives the switching signal and is turned on, and the backlight mode When the group generates the light, the display unit area is displayed according to the first data voltage signal and the light display image; and (d) the display unit area receives the first data voltage signal, and the TN unit layer receives the switch signal and turns on, When the backlight module does not generate the light, the display unit area does not present an image.

According to the present invention, a driving method for displaying a three-dimensional image by using a display device, the display device comprising a display unit area and a TN unit layer, the display unit area comprising a first display area and a second display area, the method comprising Providing a first light source group for generating a first light, a second light source for generating a second light, providing a TN unit layer and a quarter a wavelength plate, the TN unit layer is configured to be turned on when receiving a switching signal, and an angle between an optical axis of the quarter-wavelength plate and an absorption axis of the second polarizer is 45 degrees; when the first display area receives When the first data voltage signal, the second display area receives a second data voltage signal, the TN unit layer receives the switching signal, and the first light source generates the first light, the first display area is The first light display image; when the first display area receives the second data voltage signal, the second display area receives the first data voltage signal, the TN unit layer receives the switch signal, and the second When the source generates the second light, the second display area displays an image according to the second light; and when the first display area receives the second data voltage signal, the second display area receives the first data voltage signal, When the TN unit layer does not receive the switching signal and is turned off, and the first light source generates the first light, the first display area displays an image according to the first light; when the first display area receives the first data voltage signal, When the second display area receives the second data voltage signal, the TN unit layer does not receive the switching signal, and the second light source generates the second light, the second display area displays an image according to the second light.

In order to make the above-mentioned contents of the present invention more comprehensible, the preferred embodiments are described below, and the detailed description is as follows:

Please refer to FIG. 1 . FIG. 1 illustrates a three-dimensional image display device 100 for displaying three-dimensional images and circular glasses 200 according to the present invention. When the stereoscopic image is generated by the stereoscopic image display device 100, the user wears the circularly polarized glasses 200 to have a feeling of seeing the stereoscopic image.

Please refer to FIG. 2, which is a schematic diagram showing a three-dimensional image display device 100 for displaying three-dimensional images according to the present invention. The stereoscopic image display device 100 includes a backlight module 102, a synchronizer 104, a display unit region 140, a first polarizer 130, a second polarizer 132, a twisted nematic unit layer 163, and a quarter-wave plate (λ/4). Film) 170. The backlight module 102 can be a direct light emitting diode (LED), a direct-type cold cathode ray tube (CCFL) or a side-emitting LED. The display unit area 140 may be a display panel for displaying an image, and includes a pixel matrix composed of a plurality of pixels. In this embodiment, when the display unit area 140 is a liquid crystal display (LCD), The first polarizer 130 and the second polarizer 132 are respectively disposed on the light incident side and the light exit side of the display unit region 140. In another embodiment, when the display unit area 140 is an organic light emitting diode (OLED), the second polarizer 132 needs to be disposed on the light emitting side of the display unit area 140. The light generated by the backlight module 102 is irradiated to the first polarizer 130. The first polarizer 130 has a transmission axis and an absorption axis perpendicular to the transmission axis. When the unpolarized light generated from the backlight module 102 is incident, the light of the polarization axis substantially parallel to the transmission axis of the unpolarized light is transmitted, and absorbed. Light with a substantially parallel axis of the axis will be blocked. Since the first polarizer 130 is set to have a transmission axis of about 135° with respect to the observer side, it has a function of transmitting light having a polarization axis of about 135° viewed from the observer side. Unless otherwise specified, the angle of the polarization axis indicates the angle viewed by the observer side. Since the second polarizer 132 has a transmission axis of about 45° with respect to the observer side, it has a function of transmitting light having a polarization axis of about 45° viewed from the observer side. The synchronizer 104 is coupled to the backlight module 102, the display unit area 140, and the twisted nematic unit layer 163 for synchronously controlling the operations of the display unit area 140 and the shutter 160.

The pixel of the display unit area 140 displays the right-eye image when receiving the second data voltage signal R, and displays the left-eye image when receiving the first data voltage signal L. When the right-eye image light or the left-eye image light is incident on the polarizer 132, the light whose polarization axis is parallel to the transmission axis of the polarizer 132 passes through the polarizer 132, but is parallel to the absorption axis of the polarizer 132. Will be blocked.

The twisted nematic unit layer 163 is sandwiched between the two layers of conductive glass layers 166. The conductive glass layer 166 is an ITO conductive layer. When the conductive glass layer 166 receives a switching signal, the TN liquid crystal molecules in the TN unit layer 163 rotate according to the voltage difference of the applied switching signals, and are incident by the polarizer 132. After the light passes through the TN unit layer 163, its polarization direction is maintained at 45 degrees. Since the absorption axis of the quarter-wavelength plate 170 and the polarizer 132 are at an angle of 45 degrees, they become right-handed circularly polarized light after passing through the quarter-wavelength plate 170. If the conductive glass layer 166 does not receive the switching signal, the light incident from the polarizer 132 passes through the TN unit layer 163, and the polarization direction thereof becomes 135 degrees, and then becomes a left-handed rotation after passing through the quarter-wavelength plate 170. Circularly polarized light.

With the above principle, the function of the synchronizer 104 is that when the display unit area 140 emits the image light for the right eye, the switching signal is output to the conductive glass layer 166 at this time so that the image light for the right eye passes through the TN unit layer 163. Right-handed circularly polarized light; when the display unit area 140 emits left-eye image light, the synchronizer 104 does not output a switching signal to the conductive glass layer 166, so that the left-eye image light passes through the TN unit layer 163 to form left-handed circularly polarized light. .

The circular lens 200 corresponds to a polarizer having different polarization directions on both sides of the observer's left and right eyes. Therefore, only the right circularly polarized light can be seen through the polarizer on the right lens, and the polarizer on the left lens can only be seen. To the left-handed circularly polarized light. Once the observer wears the circular glasses 200, as long as the moderate control is the synchronization state of the TN unit layer 163 and the display unit area 140, the eyes can respectively see images of different images, so the human brain can perceive that the 3D image is seen. .

Please refer to FIG. 3, which is a schematic diagram of the display unit area 140 and the TN unit layer 163 of the first embodiment of the present invention. The display unit area 140 is scanned in the direction indicated by the arrow B in a manner of one column after another until the last column is scanned, which is called a picture update frequency. Then continue to scan in the first column. In order to prevent the single eye from feeling the flicker, the picture update frequency of the display unit area 140 in the present embodiment is recommended to be 240 Hz. The pixel of the display unit area 140 displays the right-eye image when receiving the second data voltage signal R, and displays the left-eye image when receiving the first data voltage signal L. In the Nth picture, initially, the pixel of the display unit area 140 displays the right-eye image when receiving the second data voltage signal R. At this time, the TN unit layer 163 does not receive the switching signal and is turned off, so the right-eye image light can be Right-handed circularly polarized light is formed through and through the quarter-wavelength plate 170. Therefore, the right eye image is seen through the right eye of the polarized glasses 200 and the right eye of the observer. At the time of the (N+1)th picture, the entire display unit area 140 receives a black insertion signal, so the picture is completely black. In the N+2 picture, the pixels of the display unit area 140 display the left-eye image when receiving the first data voltage signal L. At this time, the TN unit layer 163 receives the switching signal and turns on, so the left-eye image light passes through. Left-handed circularly polarized light is formed via the quarter-wavelength plate 170. Therefore, the left eye image is seen through the left eye of the polarized glasses 200 and the left eye of the observer. Finally, at the N+3th screen, the entire display unit area 140 receives a black signal, so the picture is completely black. Since the black signal is inserted between the display left-eye image and the right-eye image in the display unit area 140, the first data voltage signal L and the second data voltage signal R are not simultaneously input to the display unit area 140. occur. Moreover, the interval between the left-eye image and the right-eye image is 60 Hz, so there is no problem that the screen flickers.

Referring to FIG. 4, FIG. 4 is a schematic diagram of the display unit area 140, the TN unit layer 163, and the backlight module 102 of the second embodiment of the present invention. In order to prevent the single eye from feeling the flicker, the picture update frequency of the display unit area 140 in the present embodiment is suggested to be greater than 120 Hz. The pixel of the display unit area 140 displays the right-eye image when receiving the second data voltage signal R, and displays the left-eye image when receiving the first data voltage signal L. In the Nth picture, some pixels of the display unit area 140 display the right eye image when receiving the second data voltage signal R, and some pixels display the left eye image when receiving the first data voltage signal L, at this time TN The unit layer 163 is turned off without receiving the switching signal, but at this time, the backlight module 102 is turned off without providing light, so the observer cannot see the image for the right eye and the image for the left eye, so there is no vision. The problem. Until all pixels of the entire display unit area 140 receive the second data voltage signal R, that is, the N+1 picture, the backlight module 102 turns on to provide light, and the TN unit layer 163 does not receive the switching signal and turns off. Therefore, the right eye image light is passed through and forms right-handed circularly polarized light via the quarter-wavelength plate 170. Therefore, the right eye image can be seen through the right eye of the right eyeglass viewer of the circular lens 200. Next, the entire display unit area 140 is updated to display the left-eye image. Therefore, in the N+2 picture, some pixels display the right-eye image when receiving the second data voltage signal R, and some pixels are received. When the data voltage signal L is displayed, the image for the left eye is displayed, but at this time, the backlight module 102 is turned off and does not provide light, so the observer cannot see the image for the left eye and the image for the right eye, so there is no Visual problem. Until all the pixels of the entire display unit area 140 receive the first data voltage signal L, that is, the N+3 picture, the backlight module 102 turns on to provide light, and the TN unit layer 163 receives the switching signal and turns on, so The left eye image light is passed through and forms a left circularly polarized light via the quarter wave plate 170. Therefore, the left eye image is seen through the left eye of the polarized glasses 200 and the left eye of the observer. Since the backlight module 102 is turned off between the display left unit image and the right eye image in the display unit area 140 without providing light, the observer does not simultaneously see the first data voltage signal L and the second data voltage signal. The case where R is simultaneously input to the display unit area 140 occurs. Moreover, the interval between the left-eye image and the right-eye image is 60 Hz, so there is no problem that the screen flickers.

Referring to FIG. 5, FIG. 5 is a schematic diagram of the display unit area 140, the TN unit layer 163, and the backlight module 102 of the third embodiment of the present invention. The display unit area 140 is scanned in the direction indicated by the arrow B in a manner of one column after another until the last column is scanned, which is called a picture update frequency. Then continue to scan in the first column. In order to prevent the single eye from feeling flicker, the picture update frequency of the display unit area 140 of the present embodiment is suggested to be 120 Hz. The following embodiment will be described with a picture update frequency of 120 Hz. Actually, the picture update frequency is not limited thereto. The backlight module 102 includes a first light source group 110 and a second light source group 120. Preferably, the first light source group 110 and the second light source group 120 respectively occupy half of the light emitting area of the backlight module 102. The display unit area 140 includes a first display area 141, a second display area 142, and a third display area 143. The pixel of the display unit area 140 displays the right-eye image when receiving the second data voltage signal R, and displays the left-eye image when receiving the first data voltage signal L.

Please refer to FIG. 6 together. FIG. 6 is a flow chart of the method of the present invention. As shown in step 602, first, when scanning to the second display area 142, the first display area 141 and the second display area 142 receive the first data voltage signal L, and the third display area 143 maintains the reception of the previous picture. The second data voltage signal R, at which time the TN unit layer 163 receives the switching signal and is turned on, and the first light source group 110 receives the first activation signal to generate the first light. Therefore, the first display area 141 and the second display area 142 display an image according to the first light. At the same time, because the second light source group 120 is turned off, the third display area 143 receives the second data voltage signal R, but the image displayed by the third display area 143 cannot be seen by the human eye due to insufficient light.

Next, as shown in step 604. When the first display area 141 receives the second data voltage signal R, and the second display area 142 and the third display area 143 receive the first data voltage signal L, the TN unit layer 163 receives the switching signal, and the second light source group 120 receives The second start signal generates a second light. The second display area 142 and the third display area 143 display an image according to the second light. At the same time, because the first light source group 110 is turned off, the first display area 141 receives the second data voltage signal R, but the human eye cannot see the image displayed by the first display area 141 due to insufficient light.

Next, as shown in step 606. When the first display area 141 and the second display area 142 receive the second data voltage signal R, the third display area 143 receives the first data voltage signal L. When the TN unit layer 163 does not receive the switching signal and is turned off, and the first light source group 110 receives the first activation signal to generate the first light, the first display area 141 and the second display area 142 display the image according to the first light. At the same time, because the second light source group 120 is turned off, the third display area 143 receives the first data voltage signal L, but the human eye cannot see the image displayed by the third display area 143 due to insufficient light.

Finally, as shown in step 608. When the first display area 141 receives the first data voltage signal L, the second display area 142 and the third display area 143 receive the second data voltage signal R, the TN unit layer 163 does not receive the switching signal and is turned off, and the second light source group 120 When receiving the second activation signal to generate the second light, the second display area 142 and the third display area 143 display the image according to the second light. At the same time, because the first light source group 110 is turned off, the first display area 141 receives the first data voltage signal L, but the human eye cannot see the image displayed by the first display area 141 due to insufficient light.

Please note that the frequency of the switching signal, the second activation signal and the first activation signal is equal to half of the scanning frequency of the display device. In this embodiment, the scanning frequency of the display device is 120 Hz, and the frequency of the switching signal is 60 Hz, and the frequency of the second activation signal and the first activation signal is 120 Hz. The synchronizer 104 can be used to accurately synchronize the output of the switch signal, the second start signal and the first start signal. In this way, when viewing the image displayed by the display unit area 140, the observer does not reduce the resolution, and there is no display problem of different data signal voltages on the same display unit layer 140.

Referring to FIGS. 7A and 7B, FIGS. 7A and 7B are schematic diagrams showing the display unit area 140, the TN unit layer 163, and the backlight module 102 of the fourth embodiment of the present invention. The display unit area 140 is scanned in the direction indicated by the arrow B in a manner of one column after another until the last column is scanned, which is called a picture update frequency. Then continue to scan in the first column. In order to prevent the single eye from feeling the flicker, the picture update frequency of the display unit area 140 is suggested to be 120 Hz. The following embodiment will be described with a picture update frequency of 120 Hz. Actually, the picture update frequency is not limited thereto. The backlight module 102 includes a first light source group 110, a second light source group 120, a third light source group 112, and a fourth light source group 122. Preferably, the first light source group 110, the second light source group 120, and the third light source group 112. The fourth light source group 122 occupies one quarter of the light emitting area of the backlight module 102, respectively. The display unit area 140 includes a first display area 141, a second display area 142, a third display area 143, and a fourth display area 144. Preferably, the display areas 141, 142, 143, 144 occupy a quarter of the area of the display unit area 140, respectively. The pixel of the display unit area 140 displays the right-eye image when receiving the second data voltage signal R, and displays the left-eye image when receiving the first data voltage signal L.

As shown in Figure 7A. First, when scanning to the third display area 143, the first display area 141, the second display area 142, and the partially scanned third display area 143 receive the first data voltage signal L, and some of the portions have not been scanned. The third display area 143 and the fourth display area 144 maintain the second data voltage signal R received by the previous screen. At this time, the TN unit layer 163 receives the switching signal and turns on, and the first light source group 110 receives the first activation signal to generate Light. Therefore, the first display area 141 displays an image according to the light of the first light source group 110. At the same time, because the light source groups 112, 120, 122 are turned off, some of the third display area 143 and the fourth display area 144 receive the second data voltage signal R, but the second display area cannot be seen by the human eye due to insufficient light. 142. The images displayed by the third display area 143 and the fourth display area 144.

Next, the scan continues to the lower display. When scanning to the fourth display area 144, the first display area 141, the second display area 142, the third display area 143, and the partially scanned fourth display area 144 receive the first data. The voltage signal L, and the fourth display area 144 that has not been scanned, maintains the second data voltage signal R received by the previous picture. At this time, the TN unit layer 163 receives the switching signal and turns on, and the second light source group 120 receives The second start signal generates light. Therefore, the second display area 142 displays an image according to the light of the second light source group 120. Meanwhile, since the light source groups 112, 120, and 122 are turned off, the first display area 141, the third display area 143, and the fourth display area 144 cannot see the first display area 141 and the third display area 143 due to insufficient light. And the image displayed by the fourth display area 144.

When the second display area 142, the third display area 143, the fourth display area 144, and the partially scanned first display area 141 receive the first data voltage signal L, The second data voltage signal R received by the first display area 141 is still not scanned. The TN unit layer 163 receives the switching signal and turns on, and the third light source group 112 receives the third activation signal to generate light. Therefore, the third display area 143 displays an image according to the light of the third light source group 120. At the same time, since the light source groups 110, 112, 122 are turned off, the first display area 141, the second display area 142, and the fourth display area 144 cannot see the displayed image by the human eye due to insufficient light.

When scanning to the second display area 142, the first display area 142 and the partially scanned second display area 142 receive the second data voltage signal R, and the second display area 142 and the third portion that are still not scanned. The display area 143 and the fourth display area 144 receive the first data voltage signal L. At this time, the TN unit layer 163 receives the switching signal and turns on, and the fourth light source group 122 receives the fourth activation signal to generate light. Therefore, the fourth display area 144 displays an image according to the light of the fourth light source group 122. At the same time, since the light source groups 110, 112, and 120 are turned off, the first display area 141, the second display area 142, and the third display area 143 cannot see the displayed image by the human eye due to insufficient light.

As shown in Figure 7B. When scanning to the third display area 143, the first display area 141, the second display area 142, and the partially scanned third display area 143 receive the first data voltage signal L, and the third display portion that has not been scanned yet The area 143 and the fourth display area 144 maintain the second data voltage signal R received by the previous picture. At this time, the TN unit layer 163 does not receive the switching signal and is turned off, and the first light source group 110 receives the first start signal to generate light. . Therefore, the first display area 141 displays an image according to the light of the first light source group 110. At the same time, because the light source groups 112, 120, 122 are turned off, some of the third display area 143 and the fourth display area 144 receive the second data voltage signal R, but the second display area cannot be seen by the human eye due to insufficient light. 142. The images displayed by the third display area 143 and the fourth display area 144.

Next, the scan continues to the fourth display area 144. The first display area 141, the second display area 142, the third display area 143, and the partially scanned fourth display area 144 receive the first data. The voltage signal L, and the fourth display area 144 that has not been scanned, maintains the second data voltage signal R received by the previous picture. At this time, the TN unit layer 163 does not receive the switching signal and is turned off, and the second light source group 120 Receiving a second start signal to generate light. Therefore, the second display area 142 displays an image according to the light of the second light source group 120. Meanwhile, since the light source groups 112, 120, and 122 are turned off, the first display area 141, the third display area 143, and the fourth display area 144 cannot see the first display area 141 and the third display area 143 due to insufficient light. And the image displayed by the fourth display area 144.

When the second display area 141, the second display area 142, the third display area 143, and the fourth display area 144 are scanned, the first data voltage signal L is received. The first display area 141, which is still not scanned, receives the second data voltage signal R. At this time, the TN unit layer 163 does not receive the switching signal and is turned off, and the third light source group 112 receives the third activation signal to generate light. Therefore, the third display area 143 displays an image according to the light of the third light source group 120. At the same time, since the light source groups 110, 112, 122 are turned off, the first display area 141, the second display area 142, and the fourth display area 144 cannot see the displayed image by the human eye due to insufficient light.

When the second display area 142 is scanned, the first display area 142 and the partially scanned second display area 142 receive the second data voltage signal R, and the partially unscanned first display area 141 and the third display. The area 143 and the fourth display area 144 receive the first data voltage signal L, and the first display area 141 receives the second data voltage signal R. At this time, the TN unit layer 163 does not receive the switching signal and is turned off, and the fourth light source group 122 Receiving a fourth start signal to generate light. Therefore, the fourth display area 144 displays an image according to the light of the fourth light source group 122. At the same time, since the light source groups 110, 112, and 120 are turned off, the first display area 141, the second display area 142, and the third display area 143 cannot see the displayed image by the human eye due to insufficient light.

Please note that the frequency of the switching signal is equal to half the scanning frequency of the display device. Taking the embodiment as an example, the scanning frequency of the display device is 120 Hz, and the frequency of the switching signal is 60 Hz, but the frequency of sequentially turning on each light source group is 120 Hz. In this way, when the viewer views the image displayed by the display unit area 140, not only the resolution is not reduced, but also the display problem that different data signal voltages are seen by the user on the same display unit layer 140. . The main advantage of the display unit area 140 and the backlight module 102 being divided into four areas is that the brightness distribution of the backlight module 102 at the boundary of each two light source groups is not very bright and dark, but continuous, so the backlight mode When the bright area of the group 102 is very close to the display area being scanned, it is easy to cause crosstalk. Therefore, after the backlight module 102 is divided into four regions, the distance between the bright region of the backlight module 102 and the display region being scanned can be increased to reduce the interference.

The display device of the present invention may be a display device capable of simultaneously displaying different images. For example, a display device that can observe different images by a stereoscopic image display device using binocular parallax or an observer on the left and right of a display screen can be used. More specifically, it can be used for a liquid crystal television, a liquid crystal display, a plasma display, a projector, a medical display device, and the like.

While the present invention has been described in its preferred embodiments, the present invention is not intended to limit the invention, and the invention may be variously modified and modified without departing from the spirit and scope of the invention. The scope of protection shall be subject to the definition of the scope of the patent application attached.

100. . . Stereoscopic image display device

102. . . Backlight module

104. . . Synchronizer

140. . . Display unit area

130. . . First polarizer

132. . . Second polarizer

163. . . Twisted nematic unit layer

141-144. . . Display area

110. . . First light source group

120. . . Second light source group

112. . . Third light source group

122. . . Fourth light source group

200. . . Round biased glasses

210. . . cable

166. . . Conductive glass layer

170. . . Quarter wave plate

FIG. 1 is a view showing a stereoscopic image display device and a circular lens for displaying a three-dimensional image according to the present invention.

Fig. 2 is a schematic view showing a stereoscopic image display device for displaying a three-dimensional image.

Fig. 3 is a view showing the display unit area and the TN unit layer of the first embodiment of the present invention.

4 is a schematic view showing a display unit area, a TN unit layer, and a backlight module of the second embodiment of the present invention.

Figure 5 is a schematic view showing the display unit area, the TN unit layer, and the backlight module of the third embodiment of the present invention.

Figure 6 is a flow chart of the method of the present invention.

7A and 7B are schematic views showing the display unit area, the shutter, and the backlight module of the fourth embodiment of the present invention.

100. . . Stereoscopic image display device

102. . . Backlight module

104. . . Synchronizer

140. . . Display unit area

130. . . First polarizer

132. . . Second polarizer

163. . . Twisted nematic unit layer

200. . . Round biased glasses

166. . . Conductive glass layer

170. . . Quarter wave plate

Claims (7)

A display device for displaying a three-dimensional image, comprising: a first light source group for generating a first light when receiving a first start signal; and a second light source group for receiving a second start signal And generating a second light; a display unit area, comprising a first display area, a second display area, and a third display area for receiving a first data voltage signal or a second data voltage signal Displaying an image according to the first light or the second light; a TN unit layer for turning on when receiving a switching signal; and a quarter-wavelength plate for absorption of the optical axis and the second polarizer The angle between the axes is 45 degrees, wherein the first display area and the second display area receive the first data voltage signal, the third display area receives the second data voltage signal, and the TN unit layer receives the switching signal When the first light source group receives the first start signal to generate the first light, the first display area and the second display area display an image according to the first light, and when the first display area receives the first Two data The second signal display, the second display area and the third display area receive the first data voltage signal, the TN unit layer receives the switch signal, and the second light source group receives the second start signal to generate the second In the case of light, the second display area and the third display area display images according to the second light, and when the first display area and the second display area receive the second data voltage signal, the third display area receives the first The first display area and the second display area are in accordance with a data voltage signal, the TN unit layer is not received by the switching signal, and the first light source group receives the first activation signal to generate the first light. The first light display image, when the first display area receives the first data voltage signal, the second display area, and the third display area receives the second data voltage The second display area and the third display area are in accordance with the second light when the second light source is not received by the TN unit layer and the second light source group receives the second start signal to generate the second light. Display images. The display device of claim 1, further comprising: a first polarizer disposed between the display unit region and the first light source group for transmitting the first polarization direction a light or a second light; and a second polarizer disposed between the display unit region and the TN unit layer for polarizing the first light or the second light from the first polarizer The second polarization direction is changed to be different from the first polarization direction. The display device of claim 1, wherein the first and the second polarization directions are substantially perpendicular. A display device for displaying a three-dimensional image, comprising: a backlight module for generating a light; and a display unit region for receiving a first data voltage signal or a second data voltage signal according to the light Displaying an image; a TN unit layer for turning on when receiving a switching signal; and a quarter-wavelength sheet having an optical axis at an angle of 45 degrees to an absorption axis of the second polarizer, wherein the display device is Repeatingly displaying the image according to the following steps: (a) when the display unit area receives the second data voltage signal, the TN unit layer does not receive the switching signal, and the backlight module generates the light, the display unit area is a second data voltage signal and the light display image; (b) when the display unit area receives a black insertion signal, the TN unit layer does not receive the switching signal and is turned off, and the backlight module generates the light, the display unit area displays an image according to the black insertion signal; (c) When the display unit area receives the first data voltage signal, the TN unit layer receives the switching signal and turns on, and the backlight module generates the light, the display unit area displays an image according to the first data voltage signal and the light; And (d) when the display unit area receives the black insertion signal, the TN unit layer receives the switching signal and turns on, and the backlight module generates the light, the display unit area displays an image according to the black insertion signal. The display device of claim 4, further comprising: a first polarizer disposed between the display unit region and the first light source group for transmitting the first polarization direction a light or a second light; and a second polarizer disposed between the display unit region and the TN unit layer for polarizing the first light or the second light from the first polarizer The second polarization direction is changed to be different from the first polarization direction. The display device of claim 5, wherein the first and the second polarization directions are substantially perpendicular. A driving method for displaying a three-dimensional image by using a display device, the display device comprising a display unit area and a TN unit layer, the display unit area comprising a first display area and a second display area, the method comprising: providing a first a light source group and a second light source group, the first light source group is used to generate a first Light, the second light source group is configured to generate a second light; a TN unit layer and a quarter wave plate are provided, the TN unit layer is configured to be turned on when receiving a switching signal; and when the first display area is received When the first data voltage signal, the second display area receives a second data voltage signal, the TN unit layer receives the switching signal, and the first light source generates the first light, the first display area is The first light display image; when the first display area receives the second data voltage signal, the second display area receives the first data voltage signal, the TN unit layer receives the switch signal, and the second light source is generated In the second light, the second display area displays an image according to the second light; when the first display area receives the second data voltage signal, the second display area receives the first data voltage signal, the TN unit layer When the first light source generates the first light, the first display area displays an image according to the first light; when the first display area receives the first data voltage signal, When the second display area receives the second data voltage signal, the TN unit layer does not receive the switching signal, and the second light source generates the second light, the second display area displays an image according to the second light.