Display device and light-emitting device
AssigneeSharp Display Technology Corporation
InventorsKoki Oka, Kohichi Ohhara
Life of this patent
Estimating the term…
Abstract
A display device includes a control circuit. By setting an intermediate point between a start point and an end point of a lighting period as a start point of the lighting cycle, and setting an intermediate point between a start point and an end point of a lighting period of the next lighting period as an end point of the lighting cycle, the control circuit controls a backlight such that an absolute value of a difference value between a first ratio of a sum of a length of a first lighting period in the first lighting cycle and a length of the next second lighting period in the first lighting cycle to a length of the first lighting cycle and the target duty ratio is 0.1 or less.
Claims5
A display device comprising:
- a display panel including a light-emitting member that repeats lighting on and off;
- a display control unit configured to control a length of a synchronization cycle that is a cycle of a vertical synchronization signal for driving the display panel;
- and
- a light emitting control unit configured to control a length of a lighting period that is a period during which the light-emitting member lights on and a length of a lighting cycle that is a cycle during which the light-emitting member lights on, the light emitting control unit being configured to control the light-emitting member based on a target duty ratio that is a target value of a ratio of the length of the lighting period to the length of the synchronization cycle, wherein
- the light emitting control unit controls the length of the lighting cycle by setting an intermediate point between a start point and an end point of the lighting period as a start point of the lighting cycle, and setting an intermediate point between a start point and an end point of a lighting period of the next lighting period as an end point of the lighting cycle, and
- when the length of the lighting cycle is changed from a first lighting cycle to a second lighting cycle, controls the light-emitting member such that an absolute value of a difference value between a first ratio of a sum of a length of a first lighting period in the first lighting cycle and a length of a next second lighting period in the first lighting cycle to a length of the first lighting cycle and the target duty ratio is 0.1 or less, and
- controls the light-emitting member such that an absolute value of a difference value controls the light-emitting member such that an absolute value of a difference value between a second ratio of a sum of the length of the next second lighting period in the second lighting cycle and a length of a next third lighting period in the second lighting cycle to a length of the second lighting cycle and the target duty ratio is 0.1 or less.
Dependencies are inferred from the claim text.