US 12,325,304 B2
In-vehicle display device
Toshinari Watanabe, Chiyoda-ku (JP); Atsushi Inoue, Chiyoda-ku (JP); Ryou Hokari, Chiyoda-ku (JP); and Yasuhiro Inoue, Chiyoda-ku (JP)
Assigned to AGC Inc., Tokyo (JP)
Filed by AGC Inc., Tokyo (JP)
Filed on Oct. 4, 2023, as Appl. No. 18/480,676.
Application 18/480,676 is a continuation of application No. PCT/JP2022/017072, filed on Apr. 4, 2022.
Claims priority of application No. 2021-066497 (JP), filed on Apr. 9, 2021.
Prior Publication US 2024/0025258 A1, Jan. 25, 2024
Int. Cl. H04N 7/01 (2006.01); B60K 35/60 (2024.01); B60K 35/22 (2024.01)
CPC B60K 35/60 (2024.01) [B60K 35/22 (2024.01); B60K 2360/652 (2024.01); B60K 2360/691 (2024.01); B60K 2360/693 (2024.01)] 18 Claims
OG exemplary drawing
 
1. An in-vehicle display device comprising n layers from a cover glass to a housing bottom member and comprising at least a display panel midway in the n layers thereof, wherein
a member of each layer includes only a plate-shaped member, or includes the plate-shaped member and a rib,
the housing bottom member is fixed to an interior portion of a vehicle at at least two fixing points,
when a virtual plane passing through an intermediate point between the two fixing points and perpendicular to a line connecting the two fixing points is defined as a virtual plane R, a length of an intersection line between a main surface of the cover glass and the virtual plane R is defined as a distance Zcg, and a length on an intersection line between a main surface of the display panel and the virtual plane R from an upper end to a point corresponding to the intermediate point is defined as a distance Z,
a ratio Z/Zcg of the distance Z to the distance Zcg is 0.6 or less, and
the n layers from the cover glass to the housing bottom member on a virtual line L passing through a 5 mm lower end side from the upper end of the intersection line between the main surface of the display panel and the virtual plane R in a thickness direction of the in-vehicle display device satisfy the following Expression (1),

OG Complex Work Unit Math
in Expression (1),
E1: Young's modulus of the cover glass,
t1: thickness of the cover glass, and
S is represented by the following Expression (2),
S=E2·t22+ . . . +En·tn2  (2)
in Expression (2),
E2: Young's modulus of a second layer,
t2: thickness of the second layer,
En: Young's modulus of an n-th layer,
tn: thickness of the n-th layer, and
a thickness tk of any k-th layer among the 1 to n layers including the t1, the t2, and the tn is represented by the following Expression (3),

OG Complex Work Unit Math
in Expression (3),
a: thickness of the plate-shaped member of the k-th layer,
w2: width of a rib Rb1 closest to a point p on the plate-shaped member of the k-th layer through which the virtual line L passes, among the ribs,
w1: distance between the rib Rb1 and a rib Rb2 located in an extending direction of a line passing through the point p on the plate-shaped member through which the virtual line L passes and perpendicular to a center line of the rib Rb1,
h: thickness of the rib Rb1 and the rib Rb2, and
b is represented by the following Expression (4),

OG Complex Work Unit Math
wherein the n is an integer of 3 or more,
the h is a number of 0 or more,
the Young's modulus has a unit of GPa, and
the thickness, the distance, and the width have units of mm.