JP2012128357A - Video display device and video display method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique for further reducing cross talk in a display of a stereoscopic image.SOLUTION: A video display device includes: input means for inputting first video data and second video data; calculation means for calculating polarization directions and luminance values of respective pixels from the first video data and the second video data; and a display panel for displaying a video as a set of the respective pixels based on the polarization directions and the luminance values. A video display method includes: inputting video data reflected in a left eye and image data reflected in a right eye; calculating polarization directions and luminance values of respective pixels based on the video data reflected in the left eye and the video data reflected in the right eye; and displaying the video based on the polarization directions and the luminance values.

Description

  Embodiments described herein relate generally to an image display apparatus and an image display method that perform stereoscopic display using polarized light, for example.

In a liquid crystal TV or the like, a video display device for stereoscopic display is used, and a related technique includes a device for reducing crosstalk.
For example, in Patent Document 1, a polarization direction control filter is divided in the vertical direction outside a normal display (liquid crystal / PDP, etc.), and the polarization direction is controlled in synchronization with line rewriting to reduce crosstalk. Technology is disclosed. However, there is a need for a technique that further reduces crosstalk.

JP 2007-279717 A

  An object of this invention is to provide the technique which reduces crosstalk more in the display of a stereo image.

  In order to solve the above-described problem, according to the embodiment, a video display device includes input means for inputting first video data and second video data, and each of the first video data and the second video data. Calculation means for calculating a polarization direction and a luminance value of a pixel, and a display panel for displaying an image as a set of the pixels based on the polarization direction and the luminance value are provided.

The block block diagram which shows one Embodiment of this invention. The functional block block diagram which shows the structural example of TV provided with the video display apparatus of the embodiment. The enlarged view of the surface of the liquid crystal panel of the embodiment. Sectional drawing of the liquid crystal panel in the embodiment. Explanatory drawing of the spectrum to the left eye of the primary color light by the polarizing glasses used for the embodiment, and the right eye. 6 is a flowchart for explaining the timing of spectral separation of the primary color light into the left eye and the right eye according to the embodiment.

Embodiments of the present invention will be described below.
(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS. 1 to 4 and FIG.
FIG. 1 schematically shows an appearance of a digital television broadcast receiving apparatus 111 having a network function, which is a communication apparatus according to the present invention, and an example of a network system configured around the digital television broadcast receiving apparatus 111. ing.

  That is, the digital television broadcast receiver 111 mainly includes a thin cabinet 112 and a support base 113 that supports the cabinet 112 upright. Then, it is transmitted to the cabinet 112 from, for example, a flat panel type video display device 114 including a surface-conduction electron-emitter display (SED) display panel, a liquid crystal display panel, a speaker 115, an operation unit 116, and a remote controller 117. A light receiving unit 118 for receiving operation information is installed.

  Further, for example, a first memory card 119 such as an SD (Secure Digital) memory card, an MMC (Multimedia Card), and a memory stick can be attached to and detached from the digital television broadcast receiving apparatus 111. Information such as programs and photographs is recorded on and reproduced from the memory card 119.

  Further, for example, a second memory card (IC card) 120 in which contract information or the like is recorded can be attached to and detached from the digital television broadcast receiving apparatus 111. Information is stored in the second memory card 120. Recording / reproduction is performed.

  The digital television broadcast receiver 111 includes a first LAN (Local Area Network) terminal 121, a second LAN terminal 122, a USB (Universal Serial Bus) terminal 123, and an i. A LINK terminal 124 is provided.

  Among these, the first LAN terminal 121 is used as a LAN-compatible HDD dedicated port, and information is transferred to the LAN-compatible HDD 125 which is a NAS (Network Attached Storage) by Ethernet (registered trademark). Used for recording and playback.

  In this way, by providing the first LAN terminal 121 as a LAN-compatible HDD dedicated port, a high-definition image quality program can be transmitted to the LAN-compatible HDD 125 without being affected by other network environments or network usage conditions. Information recording can be performed stably.

  The second LAN terminal 122 is used as a general LAN-compatible port using Ethernet (registered trademark). For example, the LAN-compatible HDD 127, the content server 128, and the HDD built-in are provided via the hub 126. It is used to connect devices such as a DVD (Digital Versatile Disk) recorder 129 and transmit information with these devices.

  The content server 128 is a UPnP (universal plug) having a function for operating as a content server device in a home network and a service for providing URI (Uniform Resource Identifier) information necessary for content access. And play) is configured as a compatible device.

  As for the DVD recorder 129, since the digital information communicated via the second LAN terminal 122 is information only for the control system, analog video and audio information is exchanged with the digital television broadcast receiver 111. In order to transmit, it is necessary to provide a dedicated analog transmission line 130.

  Further, the second LAN terminal 122 is connected to a network 132 such as the Internet via the broadband router 131 connected to the hub 126, and information is transmitted to the content server 133, the mobile phone 134, etc. via the network 132. Used to make transmissions.

  The content server 133 is configured as a UPnP-compatible device having a function for operating as a content server device and further including a service for providing URI information necessary for content access.

  The USB terminal 123 is used as a general USB-compatible port. For example, a mobile phone 136, a digital camera 137, a card reader / writer 138 for a memory card, an HDD 139, a keyboard 140, etc. via a hub 135. USB devices are connected to each other and used for information transmission with these USB devices.

Further, i. The LINK terminal 124 is, for example, an AV-HDD 141, D (Digital)
-Used for serially connecting a VHS (Video Home System) 142 or the like and transmitting information with these devices.
FIG. 2 is a functional block configuration diagram showing a main signal processing system of the digital television broadcast receiving apparatus 111 described above. The digital television broadcast receiver 111 includes an antenna 301, a tuner unit 302, a decoder unit 303, a left and right video separation unit 304, an external input terminal 305 (corresponding to 121 to 124 and 130), a polarization direction / luminance value calculation unit 306, and a display. The panel 307 and the like are configured as shown in FIG.

  First, the broadcast wave input from the antenna 301 passes through the tuner unit 302 and the decoder unit 303 to become video data, and is input to the left and right video separation unit 304. (The video data input to the left and right video separation unit 304 may be input from the external input terminal 305.) The left and right video separation unit 304 separates the video data viewed by the left eye and the video data viewed by the right eye, and polarization is performed. The direction / luminance value calculation unit 306 calculates the polarization direction and the luminance value in each sub-pixel, and emits light having the luminance value and the polarization direction calculated from each sub-pixel of the display panel 307.

  Next, a configuration of a general liquid crystal panel will be described. FIG. 3 is an enlarged view of the surface of the liquid crystal panel of the embodiment. On the surface of the liquid crystal panel, blocks of the smallest unit (hereinafter referred to as pixels) expressing an arbitrary color are arranged in a grid on a two-dimensional plane, and the pixel P further represents the color of the pixel P. It is composed of areas (hereinafter referred to as sub-pixels) that can display primary colors. Usually, these areas are composed of three primary colors of red, green, and blue (hereinafter referred to as R, G, and B, subpixel Sr, subpixel Sg, and subpixel Sb, respectively). The pixel of the color is expressed.

  Light having an arbitrary luminance emitted from each sub-pixel is realized as follows. FIG. 4 is a cross-sectional view of the liquid crystal panel. The liquid crystal panel has a backlight unit 401 from which white light is emitted. This light passes through the RGB color filter 402 and becomes red light, green light, and blue light, respectively. Then, the liquid crystal filter 403 whose transmittance is variable by voltage is attenuated to an arbitrary luminance, and primary color light of an arbitrary luminance can be emitted from the sub-pixel (although the filter order is not limited to this order). Good).

  Next, features in the present embodiment will be described. In the cross-sectional view of FIG. 4, a polarization direction adjustment filter 404 is further added, and the polarization direction can be adjusted. Thereby, in the liquid crystal panel of this embodiment, it is possible to emit light having an arbitrary luminance value and an arbitrary polarization direction from each sub-pixel (however, the order of the filters is not in this order). Also good). An example of a TV provided with a liquid crystal panel in which the luminance value and the polarization direction can be set for each sub-pixel in the configuration to which the light direction adjustment filter 404 is added is shown (in addition to the liquid crystal panel, PDP, organic EL panel, etc. This is also possible with a hold-type display panel.) Note that the polarization direction may be set for each pixel instead of for each subpixel.

  Next, a specific calculation example of the luminance value and the polarization direction in each sub-pixel will be described. Here, the brightness value perceived by the left eye is LL, the brightness value perceived by the right eye is LR, the brightness value adjusted by the panel brightness adjustment liquid crystal filter is L, and the polarization direction (relative angle to the polarization direction of the left eye) is θ. .

In the present embodiment, the following method of “outputting left-eye video and right-eye video in time division” will be described.
(Left-eye video and right-eye video are output in time division)
In this method, the following equations 1 and 2 are set.

  The polarization direction applied to the image for the left eye is, for example, horizontal polarization, and the polarization direction of the image applied to the right eye is, for example, vertical polarization. Correspondingly, the polarizing glasses also use the left and right lenses whose polarization directions are 90 degrees different from each other, such that the polarization direction of the left eye lens is horizontal polarization and the polarization direction of the right eye lens is vertical polarization.

  The primary color light emitted from each of the sub-pixels uses polarized glasses whose left and right directions are different from each other by 90 degrees, so that when the left-eye image is displayed by the polarization direction / luminance value calculation unit 306 (in step S61 of FIG. 6). YES), light with luminance 2LL in the left eye (step S62 in FIG. 6), light with luminance 0 in the right eye, and right-eye image display (NO in step S61 in FIG. 6 and YES in step S63 in FIG. 6). Light of brightness 0 and light of brightness 2LR reach the right eye (step S64 in FIG. 6). By this alternate display, the left eye perceives the brightness LL, the right eye perceives the brightness LR, and the stereoscopic image can be perceived. Is possible.

More specifically, a stereoscopic image is perceived as an image of the entire display panel in which the subpixels are gathered.
In addition, it replaces the image | video displayed on a panel side with a three-dimensional image | video, and it is made to output two different plane images | videos, and when the left and right lenses have the same polarization direction and two polarization glasses having different polarization directions are prepared, Two people may be able to see different images.

(Second Embodiment)
A third embodiment of the present invention will be described with reference to FIGS. Description of the parts common to the first embodiment is omitted.
(The left-eye image and the right-eye image are output simultaneously by changing the polarization direction continuously.)
This method utilizes the fact that light can be dispersed by a polarizing filter. FIG. 5 is a diagram illustrating a mechanism in which primary color light emitted from a subpixel is split into left and right eyes by polarized glasses.

  Here, it is assumed that primary color light having an amplitude A and a polarization direction θ is emitted from a certain subpixel. Then, when this light is viewed with polarized glasses, it can be perceived as light having an amplitude of Acosθ by the left eye and light having an amplitude of Asinθ by the right eye. Here, when the amplitude perceived by the left eye is AL and the amplitude perceived by the right eye is AR, Equations 3 and 4 are obtained.

  That is, the amplitude and the polarization direction can be expressed as Equations 5 and 6.

  Here, considering that the luminance of light is proportional to the square of the amplitude, the luminance value and the polarization direction set on the panel may be set as shown in equations 7 and 8.

Then, the primary color light emitted from each sub-pixel is always perceived as light of luminance LL for the left eye and luminance LR for the right eye by using polarized glasses.
As the first and second embodiments, two examples of the method of continuously changing the polarization directions when the left-eye video and the right-eye video are output in a time division manner and simultaneously outputting the left-eye video and the right-eye video have been described.

  However, the method of the second embodiment is possible only when the polarization direction is set for each subpixel. Further, when the polarization direction of the second embodiment is continuously changed and the left-eye image and the right-eye image are output at the same time, the left and right images are always visible, and thus flicker can be prevented.

  In general, when stereoscopic display is realized by displaying a left-eye image and a right-eye image in a time-sharing manner, black must be inserted between the left-eye image display and the right-eye image display in order to prevent crosstalk.

However, no crosstalk occurs in the first and second embodiments.
For this reason, it is not necessary to insert black when switching between the left and right screens.
In the case of a monochrome image, the first and second embodiments can be applied without distinguishing between pixels and sub-pixels.
In addition, this invention is not limited to the said embodiment, In the range which does not deviate from the summary, it can implement in various modifications.
Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above-described embodiments. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements according to different embodiments may be appropriately combined.

  DESCRIPTION OF SYMBOLS 1 ... Input image data rearrangement part, 2 ... Buffer memory A, 3 ... Buffer control part, 4 ... Glasses shutter control part, 5 ... Buffer memory B, 6 ... Correction image generation block, 111 ... Digital television broadcast receiver, DESCRIPTION OF SYMBOLS 112 ... Cabinet, 113 ... Support stand, 114 ... Image | video display device, 115 ... Speaker, 116 ... Operation part, 117 ... Remote controller, 118 ... Light-receiving part, 119 ... 1st memory card, 120 ... 2nd memory card, 121 ... 1st LAN terminal, 122 ... 2nd LAN terminal, 123 ... USB terminal, 124 ... i. LINK terminal, 125, 127, 139 ... HDD, 126, 135 ... hub, 128, 133 ... content server, 129 ... DVD recorder, 130 ... analog transmission line, 131 ... broadband router, 132 ... network, 134, 136 ... mobile phone DESCRIPTION OF SYMBOLS 137 ... Digital camera, 138 ... Card reader / writer, 140 ... Keyboard, 141 ... AV-HDD, 142 ... D-VHS, 306 ... Polarization direction / brightness value calculation part.

Claims (5)

Input means for inputting the first video data and the second video data;
Calculating means for calculating a polarization direction and a luminance value of each pixel from the first video data and the second video data;
A display panel for controlling the polarization direction and luminance emission of each pixel based on the polarization direction and the luminance value to display an image;
A video display device comprising:   2. The video display device according to claim 1, wherein the first video data is video data for a left eye, and the second video data is video data for a right eye.   The video display device according to claim 1, wherein each of the pixels is a primary color development region. Further comprising setting means for setting a luminance value and a polarization direction for each of the pixels;
The video display apparatus according to claim 1, wherein a stereoscopic video can be viewed using polarized glasses. Enter the video data shown on the left eye and the video data shown on the right eye,
Calculate the polarization direction and luminance value of each pixel from the video data shown on the left eye and the video data shown on the right eye,
An image display method for displaying an image based on the polarization direction and the luminance value.

Images