Abstract: A gas detection element for detection of a measurement target gas is provided. The gas detection element includes a gas detection layer including a chemochromic pigment; and a spacer. The spacer is permeable to the measurement target gas, is disposed on a first surface of the gas detection layer, and has an area smaller than an area of the gas detection layer.

Abstract: A gas sensing element includes a gas detection layer including a pigment, the gas detection layer including a first surface; and a backing material disposed on the first surface of the gas detection layer. When reducing gas causes the gas sensing element to change in color, a color change ?L* of the gas sensing element is greater than or equal to 5.

Abstract: A gas detection element for detection of a measurement target gas is provided. The gas detection element includes a gas detection layer including a chemochromic pigment; and a spacer. The spacer is permeable to the measurement target gas, is disposed on a first surface of the gas detection layer, and has an area smaller than an area of the gas detection layer.

Abstract: A gas detection system includes (1) an output device configured to output data acquired by monitoring a gas sensing element including a gas detection layer including a pigment; and (2) an information processing apparatus configured to process the data output by the output device, wherein the information processing apparatus includes a determining unit configured to determine whether the gas sensing element has detected gas, based on the data, and a display control unit configured to display, on an indication element, information indicating a position of the gas sensing element that has detected the gas or information indicating a status of gas leakage determined based on the data, when the determining unit determines that the gas sensing element has detected the gas.

Abstract: A gas sensing element includes a gas detection layer including a pigment, the gas detection layer including a first surface; and a backing material disposed on the first surface of the gas detection layer. When reducing gas causes the gas sensing element to change in color, a color change ?L* of the gas sensing element is greater than or equal to 5.

Abstract: A planar lighting device includes a light guide plate, a plurality of light sources arranged in a line shape along a longitudinal direction of a side end face of the light guide plate, and a mounting substrate, on which the light sources are mounted. The mounting substrate has a base material, a conduction pattern formed on the base material, and a cover member arranged on the conduction pattern. The conduction pattern includes pairs of lands corresponding to a plurality of electrode terminals of each light source and to which the pair of electrode terminals is respectively connected, and first and second extension parts that are respectively connected to the pair of lands, extend from a first end portion of the lands, which faces the land of the adjacent light source, extend toward opposite sides of the light guide plate and to extend under the cover member.

Abstract: A planar lighting device includes a light guide plate, a plurality of light sources arranged in a line shape along a longitudinal direction of a side end face of the light guide plate, and a mounting substrate, on which the light sources are mounted. The mounting substrate has a base material, a conduction pattern formed on the base material, and a cover member arranged on the conduction pattern. The conduction pattern includes pairs of lands corresponding to a plurality of electrode terminals of each light source and to which the pair of electrode terminals is respectively connected, and first and second extension parts that are respectively connected to the pair of lands, extend from a first end portion of the lands, which faces the land of the adjacent light source, extend toward opposite sides of the light guide plate and to extend under the cover member.

Abstract: A planar lighting device comprises: a mounting substrate having a conduction pattern having an extension part formed on a base material, and a cover member is arranged on the conduction pattern, wherein the cover member has an opening that exposes together the two lands of the two adjacent light sources, and wherein the extension parts comprise: a first extension part formed to extend from a first end portion of the lands toward the light guide plate and to extend under the cover member; a second extension part formed to extend from a second end portion, toward the light guide plate and the other land of the pair of the lands and to extend under the cover member; and a third extension part formed to extend from the first end portion, toward an opposite side to the light guide plate and to extend under the cover member.