Abstract: A display device includes: a first substrate including a pixel area and a transmissive area; a thin-film transistor on the first substrate; a planarization layer on the thin-film transistor; a first light emitting electrode on the planarization layer; a bank covering a part of the first light emitting electrode; a light emitting layer on the first light emitting electrode; and a second light emitting electrode on the light emitting layer and the bank. The transmissive area includes a transmissive hole penetrating the bank and the planarization layer.

Abstract: The present invention relates to an algae collection device and, in particular, to an algae collection device using an escalator-type lift equipped with a screen having a level state. The present invention may collect algae using an escalator-type lift equipped with a screen having a level state while the algae do not move down. The present invention may effectively collect, into a collection box, the algae transported on the escalator-type lift by means of compressed air generated by a compressor.

Abstract: Provided is a water treatment apparatus using an apparatus for generating fine bubbles having a positive charge. The water treatment apparatus comprises: an apparatus for generating fine bubbles having a positive charge; a treatment bath into which the fine bubbles generated in the apparatus for generating fine bubbles are supplied and in which raw water is stored; and an ultrasonic oscillator for generating ultrasonic waves having a predetermined intensity when power is applied to explode the fine bubbles floating up to a water level after the fine bubbles are supplied into said treatment bath. Thus, germs attached to the fine bubbles may be sterilized by an exploding force generated when the fine bubbles are exploded.

Abstract: Provided is a water treatment apparatus using an apparatus for generating fine bubbles having a positive charge. The water treatment apparatus comprises: an apparatus for generating fine bubbles having a positive charge; a treatment bath into which the fine bubbles generated in the apparatus for generating fine bubbles are supplied and in which raw water is stored; and an ultrasonic oscillator for generating ultrasonic waves having a predetermined intensity when power is applied to explode the fine bubbles floating up to a water level after the fine bubbles are supplied into said treatment bath. Thus, germs attached to the fine bubbles may be sterilized by an exploding force generated when the fine bubbles are exploded.