Sensor sheet and sensor panel
To provide a sensor panel and a sensor sheet, in which a conductive fine line and a silhouette of the conductive fine line is difficult to be seen through a display portion during illumination and in which the visibility of the display portion during illumination is good. A light diffusion layer is provided on the sensor sheet, the light diffusion layer diffusing a light of an internal light source L and transmitting the light to sensor electrodes.
1. A sensor panel, comprising:
a panel substrate;
a decorative layer provided on a first surface side of the panel substrate; and
a sensor sheet provided on a second surface side of the panel substrate opposite from the first surface side;
a display portion that is illuminated by an internal light source; and
an input operation performed from a front surface side of the panel substrate,
wherein the sensor sheet has
a sensor electrode layer including a conductive fine line provided on the back surface side of the panel substrate,
a diffusion layer provided between the sensor electrode layer and the internal light source, the diffusion layer diffusing a light of the internal light source and transmitting the light to the sensor electrode layer, and
an interlayer distance T that is a distance in which the decorative layer and the sensor electrode layer of the sensor sheet are set apart, and a line width W of a conductive fine line satisfies
T≥ 20 W.
2. The sensor panel according to claim 1 , wherein the conductive fine line is a conductive coating film having a line width of 5 μm to 300 μm.
3. The sensor panel according to claim 1 , wherein the light diffusion layer is an uneven layer including an uneven surface on an internal light source side.
4. The sensor panel according to claim 3 , wherein the light diffusion layer is a print layer including an uneven surface on the internal light source side formed by a filling material and a coating film.
5. The sensor panel according to claim 3 , wherein the light diffusion layer is a crimped film including an uneven surface formed by a crimped surface on the internal light source side.
6. The sensor panel according to claim 1 , the conductive fine line located in the diffusion layer.
7. A sensor panel, comprising:
a panel substrate;
a decorative layer provided on a first surface side of the panel substrate; and
a sensor sheet provided on a second surface side of the panel substrate opposite from the first surface side;
a display portion that is illuminated by an internal light source; and
an input operation performed from a front surface side of the panel substrate,
wherein the sensor sheet has
a sensor electrode layer including a conductive fine line provided on the back surface side of the panel substrate,
a diffusion layer provided between the sensor electrode layer and the internal light source, the diffusion layer diffusing a light of the internal light source and transmitting the light to the sensor electrode layer, and
an interlayer distance T that is a distance in which the decorative layer and the sensor electrode layer of the sensor sheet are set apart, and a line width W of a conductive fine line satisfies
T≥ 10 W.