An optical module includes a transmitter configured to pass light from a light source; an emitter integrally formed with the transmitter, and configured to emit light that has passed through the transmitter to outside of the optical module; and a converter covering at least a portion of the emitter, and configured to change a wavelength of light that has passed through the transmitter such that light emitted from the converter and light emitted from the emitter have different wavelengths.

A display is provided for an aerosol-generating device, the display including: a notification window; and a nano-photonic material extending over a front surface of the notification window, the nano-photonic material being configured to, in response to a light wave comprising at least one predetermined wavelength backlighting the notification window and being incident on the nano-photonic material, increase an amplitude of the at least one predetermined wavelength and emit therefrom a light wave comprising the at least one predetermined wavelength with the increased amplitude. An aerosol-generating device including the display is also provided.

A display unit including: a plurality of first light emitting regions from which a first color light is to be extracted; a plurality of second light emitting regions from which a color light different from the first color light is to be extracted; a first light emitting device provided in each of the plurality of first light emitting regions and emitting the first color light; a second light emitting device provided in each of the plurality of second light emitting regions and emitting the first color light having a wavelength variation greater than a wavelength variation of the first color light to be emitted from the first light emitting device; and a wavelength converter provided in the second light emitting regions and converting a wavelength of the first color light emitted from the second light emitting device.

This lighting device (1) is provided with a first light source (L1) and a second light source (L2). The first light source (L1) emits a first light. The second light source (L2) emits a second light. The first light and the second light have substantially the same color temperature but different spectral characteristics. This lighting device (1) is configured such that the first light and the second light are alternately irradiated onto a road sign (2).

The embodiments relate to an electrochromic device having flexibility while achieving an excellent light transmission adjusting function based on the electrochromic principle. The electrochromic device comprises a light transmission variable structure interposed between a first base layer and a second base layer, wherein the light transmission variable structure comprises a first chromic layer and a second chromic layer, the first chromic layer comprises a reducing chromic material, the second chromic layer comprises an oxidizing chromic material, and the value of c as defined in Equation 1 is 1.0 to 1.6.

The embodiments relate to an electrochromic device having flexibility while achieving an excellent light transmission variable function based on the electrochromic principle. The electrochromic device comprises a light transmission variable structure interposed between a first base layer and a second base layer, wherein the light transmission variable structure comprises a first chromic layer and a second chromic layer, and the value of ΔTTd.sub.24 as defined in Equation (1) is 3% or less.

The embodiments relate to an electrochromic device having flexibility while achieving an excellent light transmission adjusting function based on the electrochromic principle. The electrochromic device comprises a light transmission variable structure interposed between a first base layer and a second base layer, wherein the light transmission variable structure comprises a first chromic layer and a second chromic layer, the first chromic layer comprises a reducing chromic material, the second chromic layer comprises an oxidizing chromic material, and the value of c as defined in Equation 1 is 1.0 to 1.6.

A display unit including: a plurality of first light emitting regions from which a first color light is to be extracted; a plurality of second light emitting regions from which a color light different from the first color light is to be extracted; a first light emitting device provided in each of the plurality of first light emitting regions and emitting the first color light; a second light emitting device provided in each of the plurality of second light emitting regions and emitting the first color light having a wavelength variation greater than a wavelength variation of the first color light to be emitted from the first light emitting device; and a wavelength converter provided in the second light emitting regions and converting a wavelength of the first color light emitted from the second light emitting device.

Wavelength-selective films are visibly apparent under the selective wavelength. Wavelength-selective films typically reflect off axis the selected wavelength and therefore can provide high-contrast against a background when applied in a pattern on a substrate. However, it is difficult to apply unique patterned embedded images from film. Disclosed is a cost-effective method and construction of a patterned wavelength-selective image to a substrate. In the disclosed wavelength-selective image, wavelength-selective film particles are applied to an adhesive pattern to create the wavelength-selective image.

A display with a plurality of display elements each composed of an uneven layer having an uneven structure and a multilayer film layer provided on the uneven structure. A pattern formed by convexities can be divided into shape elements each arranged in each of a plurality of virtual rectangles, when viewed from a direction facing the uneven layer, and each of the shape elements arranged in each of the virtual rectangles is inscribed in the rectangle in which the shape element is arranged. The plurality of virtual rectangles each have sides along a first direction and sides along a second direction orthogonal to the first direction, and a length of the side along the first direction is less than or equal to a sub wavelength.