Display device
The display device is mounted on a vehicle and includes a display, a reflectance control part, and a control circuit. The display includes a display surface on which a video is displayed, and is able to switch between on and off. The reflectance control part is positioned close to the display surface and is able to change a reflectance of incident light. The control circuit is configured to control a reflectance of the reflectance control part, the on and off of the display, and the video. The display surface is subjected to low reflection processing for reducing a reflectance of light.
1. A display device that is mounted on a vehicle, the display device comprising:
a display that includes a display surface on which a video is displayed, the display being able to switch between on and off;
a reflectance control part that is positioned close to the display surface, the reflectance control part being able to change a reflectance of incident light; and
a control circuit configured to control a reflectance of the reflectance control part, the on and off of the display, and the video, wherein
the display surface is subjected to low reflection processing for reducing a reflectance of light,
the reflectance control part includes:
a polarizing part that transmits rays polarized in a specific direction out of incident rays;
a liquid crystal part that changes a polarizing direction of the rays transmitted through the polarizing part; and
a polarization reflection part that transmits a ray polarized in a specific direction and reflects rays traveling in other directions than the specific direction, out of the rays transmitted through the liquid crystal part, and
the liquid crystal part includes:
a liquid crystal material;
a pair of transparent substrates that sandwich the liquid crystal material therebetween, each of the transparent substrates including a planar electrode configured to apply a voltage to the liquid crystal material; and
a sealing part that seals the liquid crystal material, the sealing part being formed in a belt shape to surround the electrodes and being arranged to overlap the electrodes and so that an outer edge of the sealing part is positioned outside of edges of the electrodes.
2. The display device according to claim 1 , wherein an optical adhesive is applied on the display surface as the low reflection processing, and the display surface is bonded to the reflectance control part.
3. The display device according to claim 1 , wherein
a thickness of each of the transparent substrates is equal to or smaller than 0.3 mm.
4. The display device according to claim 2 , wherein
a thickness of each of the transparent substrates is equal to or smaller than 0.3 mm.
5. The display device according to claim 2 , wherein
the transparent substrates include a first substrate with a plurality of first terminals and a second substrate with a plurality of second terminals,
the control circuit is connected to the first substrate and the second substrate through flexible printed circuits (FPC), and
the first substrate is connected to the FPC through the plurality of first terminals, and the second substrate is connected to the FPC through the plurality of second terminals.
6. The display device according to claim 5 , wherein
the FPC include a root part connected to the second terminals and a distal part connected to the control circuit, and
a width of the distal part is smaller than a width of the root part.
7. The display device according to claim 2 , wherein
a gap between the transparent substrates is equal to or smaller than 7 μm.
8. The display device according to claim 2 , wherein an inner edge of the sealing part is positioned inside of the edges of the electrodes.
9. The display device according to claim 8 , wherein the inner edge of the sealing part is entirely positioned inside of the edges of the electrodes.
10. The display device according to claim 9 , wherein the outer edge of the sealing part is entirely positioned outside of the edges of the electrodes.
11. The display device according to claim 2 , wherein a thickness of each of the transparent substrates is equal to or smaller than 0.55 mm and equal to or larger than 0.3 mm.
12. The display device according to claim 1 , wherein
the transparent substrates include a first substrate with a plurality of first terminals and a second substrate with a plurality of second terminals,
the control circuit is connected to the first substrate and the second substrate through flexible printed circuits (FPC), and
the first substrate is connected to the FPC through the plurality of first terminals, and the second substrate is connected to the FPC through the plurality of second terminals.
13. The display device according to claim 12 , wherein
the FPC include a root part connected to the second terminals and a distal part connected to the control circuit, and
a width of the distal part is smaller than a width of the root part.
14. The display device according to claim 1 , wherein
a gap between the transparent substrates is equal to or smaller than 7 μm.
15. The display device according to claim 1 , wherein an inner edge of the sealing part is positioned inside of the edges of the electrodes.
16. The display device according to claim 15 , wherein the inner edge of the sealing part is entirely positioned inside of the edges of the electrodes.
17. The display device according to claim 16 , wherein the outer edge of the sealing part is entirely positioned outside of the edges of the electrodes.
18. The display device according to claim 1 , wherein a thickness of each of the transparent substrates is equal to or smaller than 0.55 mm and equal to or larger than 0.3 mm.