BLACK DUTY INSERTION MODE LIQUID CRYSTAL DISPLAY FOR VIRTUAL REALITY

1 . A display device comprising:

a liquid crystal (LC) panel;

a back light unit (BLU) configured to emit light; and

a data driver configured to write data to the LC panel,

wherein the BLU emits light during a portion of a frame period and does not emit light during a remaining portion of the frame period, and

wherein the data driver writes data to the LC panel such that liquid crystal material in the LC panel transitions during the frame period including the portion of the frame period that the BLU emits light.

2 . The display device of claim 1 , wherein the data driver writes data to the LC panel during a beginning portion of the frame period.

3 . The display device of claim 1 , wherein the portion of the frame period the BLU emits light is less than half of the frame period.

4 . The display device of claim 3 , wherein the portion of the frame period the BLU emits light is 20% or less of the frame period.

5 . The display device of claim 1 , wherein the LC panel comprises a plurality of rows of pixels and the data driver writes display data to the LC panel from a first row to a last row of the pixels during the frame period and the portion of the frame period the BLU emits light is at an end portion of the frame period.

6 . The display device of claim 5 , wherein the data driver writes data to a row of the pixels between the first row and the last row of the pixels of the LC panel during the remaining portion of the frame period the BLU does not emit light.

7 . The display device of claim 5 , wherein the data driver writes data to the last row of the pixels of the LC panel during the remaining portion of the frame period the BLU does not emit light.

8 . The display device of claim 5 , wherein the liquid crystal material in a row of the pixels between the first row and the last row of the pixels of the LC panel transitions during the portion of the frame period the BLU emits light.

9 . The display device of claim 5 , wherein the liquid crystal material in the last row of the pixels of the LC panel transitions during the portion of the frame period the BLU emits light.

10 . The display device of claim 1 , further comprising:

a controller coupled to the data driver and the BLU, the controller configured to:

apply a first control signal to the data driver to write data to a plurality of rows of the LC panel during the frame period; and

apply a second control signal to the BLU to emit light during the portion of the frame period and to not emit light during the remaining portion of the frame period.

11 . A display device comprising:

a liquid crystal (LC) panel;

a back light unit (BLU) configured to emit light; and

a data driver configured to write data to the LC panel,

wherein the BLU emits light during a portion of a frame period and does not emit light during a remaining portion of the frame period, and

wherein the data driver writes data to the LC panel during a first portion of the frame period such that liquid crystal material in the LC panel transitions during the portion of the frame period the BLU emits light.

12 . The display device of claim 11 , wherein the first portion of the frame period is contained in the remaining portion of the frame period.

13 . The display device of claim 11 , wherein the portion of the frame period the BLU emits light is less than half of the frame period.

14 . The display device of claim 13 , wherein the portion of the frame period the BLU emits light is 20% or less of the frame period.

15 . The display device of claim 11 , wherein the LC panel comprises a plurality of rows of pixels and the data driver writes display data to the LC panel from a first row to a last row of the pixels during the first portion of the frame period and the portion of the frame period the BLU emits light is at an end portion of the frame period.

16 . The display device of claim 15 , wherein the liquid crystal material in a row of the pixels between the first row and including the last row of the pixels of the LC panel transitions during the portion of the frame period the BLU emits light.

17 . The display device of claim 11 , further comprising:

a controller coupled to the data driver and the BLU, the controller configured to:

apply a first control signal to the data driver to write data to a plurality of rows of the LC panel during the first portion of the frame period; and

apply a second control signal to the BLU to emit light during the portion of the frame period and to not emit light during the remaining portion of the frame period.

18 . A display device comprising:

a liquid crystal (LC) panel;

a data driver configured to write data to the LC panel;

a back light unit (BLU) configured to emit light; and

a controller coupled to the data driver and the BLU, the controller controlling the data driver to write data to a plurality of rows of the LC panel during a frame period from a frame period start time to a write period end time and instructing the BLU to emit light from an illumination start time to the frame period end time, the illumination start time occurring after the write period end time and at a predetermined timing between the frame period start time and the frame period end time, wherein liquid crystal material in the LC panel transitions after the illumination start time and before the frame period end time.

19 . The display device of claim 18 , wherein the illumination start time occurs during a last 20% of the frame period.

20 . The display device of claim 18 , wherein the frame period is 11 milliseconds, and the illumination start is 2 milliseconds before the frame period end time.