Display device control method

1. A display device control method, comprising:

providing a display device, wherein the display device comprises:

a display module, comprising a light source that emits an input light;

a privacy module, disposed on the display module and for receiving the input light, the privacy module comprising a first polarizing element for absorbing light in a predetermined direction, wherein the input light passes through the first polarizing element to output an output light from an output surface of the first polarizing element; and

a light modulator, disposed between the display module and the privacy module,

determining an operation mode of the display device;

sensing an orientation mode of the display device, wherein the orientation mode comprises a landscape mode and a portrait mode; and

enabling or disabling the light modulator based on the operation mode and based on the orientation mode of the display device.

2. The display device control method as claimed in claim 1 ,

wherein the operation mode of the display device comprises a sharing mode and a privacy mode.

3. The display device control method as claimed in claim 2 , wherein the step of controlling the light modulator comprises:

enabling or disabling the light modulator to change the operation mode when the display device is in the landscape mode.

4. The display device control method as claimed in claim 2 , wherein the step of controlling the light modulator comprises:

enabling or disabling the light modulator to change the operation mode when the display device is in the portrait mode.

5. The display device control method as claimed in claim 2 , wherein the output surface of the first polarizing element comprises a first edge, a second edge, a third edge, and a fourth edge, the second edge is connected to the first edge, the third edge is connected to the second edge, the fourth edge is connected to the first edge and the third edge, the third edge is opposite to the first edge, and the fourth edge is opposite to the second edge, wherein the first edge and the third edge are parallel to a first direction,

wherein the first direction is perpendicular to an optical axis of the display device, the second edge and the fourth edge are parallel to a second direction, the second direction is perpendicular to the optical axis of the display device and is perpendicular to the first direction, and

wherein the output light from the first edge has a first polarized direction that is parallel to the first direction, the output light from the second edge has a second polarized direction that is parallel to the second direction, the output light from the third edge has a third polarized direction that is parallel to the first direction, and the output light from the fourth edge has a fourth polarized direction that is parallel to the second direction.

6. The display device control method as claimed in claim 5 , further comprising:

determining the operation mode of the display device as the privacy mode;

sensing the orientation mode of the display device as the landscape mode; and

disabling the light modulator.

7. The display device control method as claimed in claim 5 , further comprising:

determining the operation mode of the display device as the sharing mode;

sensing the orientation mode of the display device as the landscape mode; and

enabling the light modulator.

8. The display device control method as claimed in claim 5 , further comprising:

determining the operation mode of the display device as the sharing mode;

sensing the orientation mode of the display device as the portrait mode; and

disabling the light modulator.

9. The display device control method as claimed in claim 5 , further comprising:

determining the operation mode of the display device as the privacy mode;

sensing the orientation mode of the display device as the portrait mode; and

enabling the light modulator.