Display controller, three dimensional display, and method of reducing crosstalk

• US 6,573,928 B1
• Filed: 05/03/1999
• Issued: 06/03/2003
• Est. Priority Date: 05/02/1998
• Status: Expired due to Term

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Holliman, Nicolas Steven, Jones, Graham Roger
• Primary Examiner(s): Philippe, Gims S.
• Application Number:
  US09/303,863
• Time in Patent Office: 1,492 Days
• Field of Search: 348/51, 348/42, 348/60, 348/43, 345/58, 345/89, 345/92, 345/94, 345/100, 345/204, 345/690
• US Class Current: 348/51
• CPC Class Codes: G02B 30/27 involving lenticular arrays
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 2310/0297 Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns
• CPC Class Codes: G09G 2320/0209 Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
• CPC Class Codes: G09G 3/003 to produce spatial visual effects
• CPC Class Codes: G09G 3/20 for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
• CPC Class Codes: G09G 3/3607 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127
• CPC Class Codes: G09G 3/3611 Control of matrices with row and column drivers
• CPC Class Codes: G09G 5/395 Arrangements specially adapted for transferring the contents of the bit-mapped memory to the screen G09G5/399 takes precedence
• CPC Class Codes: H04N 13/122 Improving the 3D impression of stereoscopic images by modifying image signal contents, e.g. by filtering or adding monoscopic depth cues H04N13/128 takes precedence
• CPC Class Codes: H04N 13/15 for colour aspects of image signals
• CPC Class Codes: H04N 13/161 Encoding, multiplexing or demultiplexing different image signal components for multi-view video sequence encoding H04N19/597
• CPC Class Codes: H04N 13/167 Synchronising or controlling image signals
• CPC Class Codes: H04N 13/189 Recording image signals; Reproducing recorded image signals
• CPC Class Codes: H04N 13/194 Transmission of image signals
• CPC Class Codes: H04N 13/286 having separate monoscopic and stereoscopic modes
• CPC Class Codes: H04N 13/31 using parallax barriers
• CPC Class Codes: H04N 13/324 Colour aspects
• CPC Class Codes: H04N 13/327 Calibration thereof
• CPC Class Codes: H04N 13/349 Multi-view displays for displaying three or more geometrical viewpoints without viewer tracking for viewing without the aid of special glasses using fly-eye lenses H04N13/307
• CPC Class Codes: H04N 13/359 : Switching between monoscopic and stereoscopic modes
• CPC Class Codes: H04N 13/361 : Reproducing mixed stereoscopic images; Reproducing mixed monoscopic and stereoscopic images, e.g. a stereoscopic image overlay window on a monoscopic image background
• CPC Class Codes: H04N 13/398 : Synchronisation thereof; Control thereof
• CPC Class Codes: H04N 19/597 : specially adapted for multi-view video sequence encoding

Abstract

A stereoscopic display controller supplies serial picture element data to a scanned stereoscopic display which includes a plurality of picture elements. Each of the picture elements includes image data for M color components, while M is greater than one. The stereoscopic display controller includes: N memories, N being an integer greater than one; a memory controller arranged to write the picture element data for N different views of a three-dimensional image in the respective memories, and arranged to control reading of the memories in turn so that image data for consecutively scanned picture elements of the display are read from different ones of the memories; and a data reordering circuit coupled to outputs of the memories and arranged to reorder the image data for at least one of the color components.

Claims

1. A method for reducing crosstalk between first and second images defined by respective sets of picture elements, to produce respective sets of crosstalk corrected picture elements, the method comprising the steps of:

adding a grey level to the first image to form a first sum;

adding a grey level to the second image to form a second sum;

subtracting from the first sum an amount equal to a given fraction of the second image; and

subtracting from the second sum an amount equal to a given fraction of the first image,

wherein the method further comprises a calculation step of a partial result which is used to determine the crosstalk corrected picture elements for both the first and second images.

2. A method according to claim 1, wherein each of the picture elements comprising M color components having an intensity value, the method further comprising the steps of:

for an intensity level Ix of each of the picture elements of the first image, determining a crosstalk corrected picture intensity level Iox according to either;

3. A method according to claim 2, wherein the partial results is expressed as K(Im−

Ix−

Iy−

1).

4. A method according to claim 3, wherein division operations for determining the crosstalk corrected picture intensity levels Iox and Ioy are carried out by using a bit shift operation on the partial result.