Provided is a method of displaying price tag information applied to a price tag generating apparatus in a shelf system which includes a shelf and at least one display screen arranged on the shelf. The method includes: acquiring an image of a commodity placed on the shelf; determining price tag related information based on the image of the commodity, wherein the price tag related information comprises price tag information of the commodity; and sending the price tag related information to a target display screen, which is a display screen for displaying the price tag information in the at least one display screen, and the price tag related information being configured to allow the target display screen to display the price tag information.

The purpose of the present invention is to provide a magnetic fluid display in which a magnetic fluid moves in response to a magnetic field and which may display a unique visual image according to the meeting and parting of the magnetic fluid. A magnetic fluid display according to the present invention comprises: a display unit including a transparent liquid into which a magnetic fluid is injected; and a magnetic field generating unit for applying a magnetic field to the magnetic fluid at a rear surface of the display unit. When the magnetic field is applied, the magnetic fluid moves in the transparent liquid in a directional manner, so that an image may be displayed on the display unit.

The purpose of the present invention is to provide a magnetic fluid display in which a magnetic fluid moves in response to a magnetic field and which may display a unique visual image according to the meeting and parting of the magnetic fluid. A magnetic fluid display according to the present invention comprises: a display unit including a transparent liquid into which a magnetic fluid is injected; and a magnetic field generating unit for applying a magnetic field to the magnetic fluid at a rear surface of the display unit. When the magnetic field is applied, the magnetic fluid moves in the transparent liquid in a directional manner, so that an image may be displayed on the display unit.

A light emitting cell for use as a pixel, the light emitting cell being configured to generate the three primary colors and to form different color tones therewith, comprising: a light emitting front surface, a rear surface, and a substrate arranged between the front and rear surface; a light source carried by the substrate; three luminous sections, comprising a blue luminous section, a light converting red luminous section, and a light converting green luminous section; and a primary color selection device capable of performing a repetitive movement at a certain frequency so that, during this movement, one of the luminous sections is alternately selected as a potential light emitting section, characterized in that the primary color selection device is a single mechanical component that serves to select all three luminous sections.

A light emitting cell for use as a pixel, the light emitting cell being configured to generate the three primary colors and to form different color tones therewith, comprising: a light emitting front surface, a rear surface, and a substrate arranged between the front and rear surface; a light source carried by the substrate; three luminous sections, comprising a blue luminous section, a light converting red luminous section, and a light converting green luminous section; and a primary color selection device capable of performing a repetitive movement at a certain frequency so that, during this movement, one of the luminous sections is alternately selected as a potential light emitting section, characterized in that the primary color selection device is a single mechanical component that serves to select all three luminous sections.

A persistence of vision (PoV) display panel (155) comprises first, second, third, fourth and fifth PoV display units (100) having first, second, third, fourth and fifth display areas (140) respectively. The first, second, third and fourth PoV display units (100) are arranged such that their respective display areas (140) form a 2×2 array in at least one display plane and form a display area void (150) bounded by their respective display areas. The fifth PoV display unit (100) is arranged such that the fifth display area (140) is offset from the at least one display plane and corresponds to the display area void (150).

The purpose of the present invention is to provide a magnetic fluid display in which a magnetic fluid moves in response to a magnetic field and which may display a unique visual image according to the meeting and parting of the magnetic fluid. A magnetic fluid display (10) according to the present invention comprises: a display unit (110) including a transparent liquid into which a magnetic fluid (111) is injected; and a magnetic field generating unit (200) for applying a magnetic field (M) to the magnetic fluid (111) at a rear surface of the display unit (110). When the magnetic field is applied, the magnetic fluid moves in the transparent liquid in a directional manner, so that an image may be displayed on the display unit.

The purpose of the present invention is to provide a magnetic fluid display in which a magnetic fluid moves in response to a magnetic field and which may display a unique visual image according to the meeting and parting of the magnetic fluid. A magnetic fluid display (10) according to the present invention comprises: a display unit (110) including a transparent liquid into which a magnetic fluid (111) is injected; and a magnetic field generating unit (200) for applying a magnetic field (M) to the magnetic fluid (111) at a rear surface of the display unit (110). When the magnetic field is applied, the magnetic fluid moves in the transparent liquid in a directional manner, so that an image may be displayed on the display unit.

An image display device element, a filter element, and a reflective element allow a brightened display screen displaying red, green, blue, and composite colors through use of a single light-emitting portion. The image display device has a first element where a boundary wavelength between light absorption and light transmission or between reflection in an oblique direction and light transmission is variable or fixed and a second element where a wavelength region to be reflected is variable or fixed. The boundary wavelength of the first element and/or the wavelength region of the second element is variable. A positional relationship exists where light transmitted by the first element is incident on the second element. Controlling overlap between light transmission bands of the elements through varying the boundary wavelength of the first element and/or the wavelength region of the second element varies a band and amount of light reflected by the second element.

An image display device element, a filter element, and a reflective element allow a brightened display screen displaying red, green, blue, and composite colors through use of a single light-emitting portion. The image display device has a first element where a boundary wavelength between light absorption and light transmission or between reflection in an oblique direction and light transmission is variable or fixed and a second element where a wavelength region to be reflected is variable or fixed. The boundary wavelength of the first element and/or the wavelength region of the second element is variable. A positional relationship exists where light transmitted by the first element is incident on the second element. Controlling overlap between light transmission bands of the elements through varying the boundary wavelength of the first element and/or the wavelength region of the second element varies a band and amount of light reflected by the second element.