Vehicle mounted display device
The present invention relates to a vehicle-mounted display device disposed in an interior member of a vehicle. The vehicle-mounted display device of the invention includes: a display panel; a cover glass covering the display panel; a housing accommodating the display panel; and a holding portion holding a position of the housing, in which the cover glass is a tempered glass having a thickness being 0.5 to 2.5 mm, a thickness of a compressive stress layer being 10 μm or more, and a surface compressive stress of a compressive layer being 650 MPa or higher, and when the thickness (unit: mm) of the cover glass is represented by x and an energy absorption rate (unit: %) of the holding portion is represented by y. Expression (1) is satisfied, and impact resistance of the cover glass is excellent: y ≥−37.1× ln( x )+53.7 (1).
1. A vehicle mountable display device that able to be disposed in an interior member of a vehicle, the vehicle-mounted display device comprising:
a display panel;
a cover glass that covers the display panel;
a housing that accommodates the display panel; and
a holding portion that holds a position of the housing,
wherein the cover glass is a tempered glass having a thickness being from 0.5 to 2.5 mm, a thickness of a compressive stress layer being 10 μm or more, and a surface compressive stress of the compressive stress layer being 650 MPa or higher, and
when the thickness (unit: mm) of the cover glass is represented by x and an energy absorption rate (unit: %) of the holding portion is represented by y, the following Expression (1) is satisfied:
y≥− 37.1×ln( x )+53.7 (1).
2. The vehicle mountable display device according to claim 1 , wherein the holding portion comprises:
an impact absorbing portion that has impact absorbability and is disposed on a back surface side of the housing; and
a fixing portion that fixes the position of the housing.
3. The vehicle mountable display device according to claim 2 , wherein the impact absorbing portion is a cushioning material, a honeycomb mechanism, a rotation mechanism, or a sliding mechanism.
4. The vehicle mounted display device according to claim 2 , wherein a material of the fixing portion is a metal.
5. The vehicle mountable display device according to claim 2 , wherein the fixing portion has an L-shape or a corrugated L-shape in cross-section.
6. The vehicle mountable display device according to claim 2 , wherein the fixing portion and the housing are joined through a bolt.
7. The vehicle mountable display device according to claim 1 , wherein the cover glass is a soda-lime glass or an aluminosilicate glass.
8. The vehicle mountable display device according to claim 1 , wherein the cover glass comprises, indicated by mol %, from 50 to 80% of SiO 2 , from 1 to 20% of Al 2 O 3 , from 6 to 20% of Na 2 O, from 0 to 11% of K 2 O, from 0 to 15% of MgO, from 0 to 6% of CaO, and from 0 to 5% of ZrO 2 .
9. The vehicle mountable display device according to claim 1 , comprising a light shielding portion formed on a peripheral portion of the cover glass.
10. The vehicle mountable display device according to claim 9 , wherein the light shielding portion has a frame shape.
11. The vehicle mountable display device according to claim 1 , wherein the display panel and the cover glass are bonded to each other through an adhesive layer.
12. The vehicle mountable display device according to claim 11 , wherein the adhesive layer has a thickness of from 5 to 400 μm.
13. The vehicle mountable display device according to claim 11 , wherein the adhesive layer has a storage shear modulus of from 5 kPa to 5 MPa.
14. The vehicle mountable display device according to claim 1 , wherein the cover glass is bonded to a top surface of a housing frame of the housing through a double-sided tape.
15. The vehicle mountable display device according to claim 1 , wherein the display panel is a liquid crystal panel, an organic EL panel, a PDP, or an electronic ink panel.
16. The vehicle mountable display device according to claim 1 , which is an embedded type or a standing type.
17. The vehicle mountable display device according to claim 1 , further comprising a backlight unit between the display panel and a bottom plate of the housing.
18. A vehicle comprising the vehicle mountable display device according claim 1 .