Back to results
US 8,508,563 B2Granted
Image display apparatus and control method thereof
AssigneeCanon Kabushiki Kaisha
InventorKoji Kobayashi
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeCanon Kabushiki Kaisha
InventorKoji Kobayashi
Estimating the term…
An image display apparatus has a correction unit that performs a correction process on image signals so as to suppress luminance fluctuation caused by capacitive coupling between adjacent column wirings. The correction unit includes: a correction value generation unit that determines a correction value for a pixel to be corrected on the basis of a combination of a signal value of the pixel to be corrected and signal values of adjacent pixels which are on a column wiring next to a column wiring on which the pixel to be corrected is, and on the basis of a position of the pixel to be corrected in a column direction; and a correction operation unit that corrects a signal of the pixel to be corrected using the correction value generated by the correction value generation unit.
An image display apparatus having a plurality of pixels disposed at intersections between a plurality of row wirings and a plurality of column wirings, comprising:
A control method of an image display apparatus that is provided with:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
From the US filing history. Foreign family members aren’t listed.
Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes: for presentation of an…
Improving the quality of display appearance: crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain…
Arrangements or circuits for control of indicating devices using static means to
About 5 years 5 months of term left · ends 3 Apr 2032 (estimated)
1. Field of the Invention
The present invention relates to an image display apparatus in which crosstalk generated in a matrix-driven display panel is suppressed, and to a control method of the image display apparatus.
2. Description of the Related Art
FIG. 1 is a diagram for explaining a configuration example of a crosstalk correction unit in a first embodiment;
FIG. 2 is an example of a basic configuration of an ordinary matrix-driven display device;
FIG. 3 is a diagram illustrating the configuration and signal flow of a control circuit;
Preferred embodiments of the present invention are explained below with reference to accompanying drawings. The present invention relates to a technology for correcting crosstalk that is generated on account of capacitive coupling between adjacent column wirings in matrix-driven display panels. In the embodiments below, specific examples will be explained in which the present invention is used in an image display apparatus (FED) that utilizes field emission devices (electron-emitting devices) as pixels (display elements). The scope of use of the present invention, however, is not limited thereto, and the invention may be used in image display apparatuses other than FED, so long as the apparatus is an image display apparatus having a matrix-driven display panel.
(Overall Configuration of the Image Display Apparatus)
FIG. 2 is an example illustrating the basic overall configuration of an ordinary FED. A rear plate 16 is a glass substrate that makes up a cathode panel of the FED panel. A plurality of column wirings 14 and a plurality of row wirings 15 are formed, in the form of a matrix, on the rear plate 16. Pixels (display elements) are formed at each intersection of the column wirings 14 and the row wirings 15. Although not shown in the figures, an anode panel, provided with a phosphor and an anode electrode (metal back) is disposed so as to oppose the cathode panel. The column wirings 14 are connected to a column drive circuit 12, the row wirings 15 are connected to a row drive circuit 13, and the driving circuits 12, 13 are connected to a control circuit 11. An FED module is configured thus as described above.