Display system and vehicle
AssigneeJapan Display Inc.
InventorToshiharu Matsushima
Life of this patent
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Abstract
According to one embodiment, a display system includes an external light sensor, a display panel, a viewing angle control panel including a liquid crystal layer containing liquid crystal molecules twist-aligned, configured such that a drive voltage applied to the liquid crystal layer is controlled based on an external light intensity detected by the external light sensor, and a polarization axis rotation element disposed between the viewing angle control panel and the display panel. The drive voltage when the external light intensity is less than a threshold value is greater than the drive voltage when the external light intensity is greater or equal to than the threshold value.
Claims10
A display system comprising:
- an optical light sensor detecting a light intensity;
- a display panel;
- a first polarizer disposed on a front side of the display panel;
- a viewing angle control panel comprising a liquid crystal layer containing liquid crystal molecules twist-aligned;
- and
- a polarization axis rotation element disposed between the viewing angle control panel and the display panel, and rotating a polarization axis of light transmitted through the viewing angle control panel, wherein
- the liquid crystal molecules twist-aligned include an alignment direction which is substantially parallel to a first transmission axis of the first polarizer,
- the viewing angle control panel is configured that a luminance of a transmitted light in the alignment direction decreases as a drive voltage applied to the liquid crystal layer increases,
- in a first mode which the light intensity is less than or equal to a threshold value, the drive voltage is set to a first voltage,
- in a second mode which the light intensity is greater than the threshold value, the drive voltage is set to a second voltage, and
- the first voltage is different from the second voltage.
A vehicle comprising:
- a front window disposed in a front part of the vehicle;
- a driver seat and a passenger seat;
- a display device;
- and
- an optical light sensor detecting a light intensity, wherein
- the display device comprises:
- a display panel;
- a first polarizer disposed on a front side of the display panel;
- and
- a viewing angle control panel comprising a liquid crystal layer containing liquid crystal molecules twist-aligned, and
- the liquid crystal molecules twist-aligned include an alignment direction which is substantially parallel to a first transmission axis of the first polarizer,
- the viewing angle control panel is configured that a luminance of a transmitted light in the alignment direction decreases as a drive voltage applied to the liquid crystal layer increases,
- in a first mode which the light intensity is less than or equal to a threshold value, the drive voltage is set to a first voltage,
- in a second mode which the light intensity is greater than the threshold value, the drive voltage is set to a second voltage, and
- the first voltage is different from the second voltage.
Dependencies are inferred from the claim text.