A flexible display device includes a flexible display panel, a first sensor, a second sensor, and at least one control unit. The voltage is capacitively coupled to the selected word line by increasing the voltages of the adjacent word lines after a programming voltage has been applied to a string driver transistor for the selected word line and after a string driver voltage has been applied to the gates of all of the string driver transistors in an array. A spacer is provided to prevent the release member from being pushed in. The routine places indicators at the top, bottom, right side and left side of the focused display. A backplane is coupled with the ground plane, on a side of the ground plane opposite the circuit board. The invention has the additional object of enabling highly concentrated organic wastes to be treated efficiently in a short time.