CROSS REFERENCE TO RELATED APPLICATIONS

The present application claims the priority benefit of Japanese Patent Application No. 2019-114322 filed in the Japan Patent Office on Jun. 20, 2019, which is hereby incorporated by reference in its entirety for all purposes as if fully set forth herein.

BACKGROUND

Technical Field

The present disclosure relates to a display control device, a display device and a method of controlling a display device.

Discussion of the Related Art

In a Japanese Patent Publication No. 2006-133711, a signal processing circuit for an emissive display including four color sub-pixels of red, green, blue and white colors is disclosed. The signal processing circuit has a function converting an RGB input signal to an RGBW signal.

In the signal conversion as described in the Japanese Patent Publication No. 2006-133711, one of the four sub-pixels may have a luminance of 0. Voltages applied to a transistor belong to the one sub-pixel having the luminance of 0 and a transistor belong to the other sub-pixel having a luminance other than 0 are greatly different from each other. Since a threshold voltage variation depends on the transistor, a compensation of the threshold voltage may not be adequately applied to the two transistors having different applied voltages.

SUMMARY

Accordingly, embodiments of the present disclosure are directed to a display control device, a display device, and a method of controlling a display device that substantially obviate one or more of the problems due to limitations and disadvantages of the related art.

An object of the present disclosure is to provide a display control device, a display device and a method of controlling a display device where a compensation of a threshold voltage variation of a transistor in a pixel of a display device.

Additional features and aspects will be set forth in the description that follows, and in part will be apparent from the description, or may be learned by practice of the inventive concepts provided herein. Other features and aspects of the inventive concepts may be realized and attained by the structure particularly pointed out in the written description, or derivable therefrom, and the claims hereof as well as the appended drawings.

To achieve these and other aspects of the inventive concepts, as embodied and broadly described herein, a display control device for controlling a display device including a display unit having a plurality of pixels each including a first sub-pixel of a first color, a second sub-pixel of a second color, a third sub-pixel of a third color and a fourth sub-pixel of a fourth color, comprises: an input part receiving an input signal including gray levels of the first color, the second color and the third color constituting a color for each of the plurality of pixels; a selection part selecting at least one of the plurality of pixels as a selection pixel and other of the plurality of pixels as a non-selection pixel; and an output part outputting an output signal controlling luminances of the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel based on the input signal, wherein at least one of the first sub-pixel, the second sub-pixel and the third sub-pixel of the non-selection pixel is controlled to have a luminance of 0 according to the output signal, and wherein the fourth sub-pixel of the selection pixel is controlled to have a luminance of 0 according to the output signal.

In another aspect, a display device comprises: a display unit having a plurality of pixels each including a first sub-pixel of a first color, a second sub-pixel of a second color, a third sub-pixel of a third color and a fourth sub-pixel of a fourth color; and a display control device for controlling the display device, the display control device including: an input part receiving an input signal including gray levels of the first color, the second color and the third color constituting a color for each of the plurality of pixels; a selection part selecting at least one of the plurality of pixels as a selection pixel and other of the plurality of pixels as a non-selection pixel; and an output part outputting an output signal controlling luminances of the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel based on the input signal, wherein at least one of the first sub-pixel, the second sub-pixel and the third sub-pixel of the non-selection pixel is controlled to have a luminance of 0 according to the output signal, wherein the fourth sub-pixel of the selection pixel is controlled to have a luminance of 0 according to the output signal.

In another aspect, a method of controlling a display device including a display unit having a plurality of pixels each including a first sub-pixel of a first color, a second sub-pixel of a second color, a third sub-pixel of a third color and a fourth sub-pixel of a fourth color, comprises: inputting an input signal including gray levels of the first color, the second color and the third color constituting a color for each of the plurality of pixels; selecting at least one of the plurality of pixels as a selection pixel and other of the plurality of pixels as a non-selection pixel; and outputting an output signal controlling luminances of the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel based on the input signal, wherein at least one of the first sub-pixel, the second sub-pixel and the third sub-pixel of the non-selection pixel is controlled to have a luminance of 0 according to the output signal, and wherein the fourth sub-pixel of the selection pixel is controlled to have a luminance of 0 according to the output signal.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the inventive concepts as claimed.

