Patent ID: 11875759
Assignee: JAPAN DISPLAY INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A display device comprising:
a display panel comprising a plurality of pixels arranged in a matrix, a common electrode, a pixel electrode disposed for each of the pixels, and a liquid crystal layer containing a polymer and liquid crystal molecules;
a light source emitting light to the display panel; and
a controller controlling a voltage between the common electrode and the pixel electrode, and controlling an operation of the light source, wherein
the controller applies a voltage corresponding to an image component to write the image component between the common electrode and the pixel electrode in order from the pixel located on an opposite side to the light source in a first period,
the controller turns on the light source to display an image corresponding to the written image component on the display panel in the first period,
the controller applies a transparent voltage for erasing the image component written in the pixel between the common electrode and the pixel electrode in a second period before the controller applies the voltage corresponding to the image component between the common electrode and the pixel electrode,
the controller turns off the light source in the second period,
the controller maintains the light source on in a third period following the first period to display one image composed of the image components written in the pixels on the display panel when writing of the image component to the pixels is completed and the first period ends,
a frame period in which the one image is displayed includes the first to third periods,
the light source includes a first light-emitting element emitting light of a first color, and a second light-emitting element emitting light of a second color,
the frame period includes a first field period having the first to third periods corresponding to the first color, and a second field period having the first to third periods corresponding to the second color and following the first field period,
in the first period included in the first field period, the controller applies the voltage corresponding to the image component of the first color to write the image component of the first color to the pixels, and turns on the first light-emitting element when the image component of the first color starts to be written to the pixels in order from the pixel located on an opposite side to the light source,
in the first period included in the second field period, the controller applies the voltage corresponding to the image component of the second color to write the image component of the second color to the pixels, and turns on the second light-emitting element when the image component of the second color starts to be written to the pixels in order from the pixel located on the opposite side to the light source, and
the controller applies the transparent voltage to erase the image components of the first color written in the pixels before the controller writes the image component of the second color to the pixels in the first period of the second field period.