Display device and method of manufacture thereof

A display device provided with a display panel and a driving unit, the display panel including a front substrate, a back substrate facing the front substrate, an intermediate substrate between the front substrate and the back substrate, and a plurality of pixels in a matrix, each pixel including a first display element facing the front substrate and a second display element facing the back substrate, the driving unit driving the first display element and the second display element,

• in the first display element, first partition walls being disposed in a space between the front substrate and the intermediate substrate to partition adjacent pixels into first cell spaces, first colored particles having an electrostatic charge property being enclosed in each first cell space, a first display electrode facing the front substrate being provided in each first cell space, and one or more first focusing electrodes being provided within the first partition walls,
• in the second display element, second partition walls being disposed in a space between the back substrate and the intermediate substrate to partition adjacent pixels into second cell spaces, second colored particles having an electrostatic charge property being enclosed in each second cell space, a second display electrode facing the back substrate being provided in each second cell space, and one or more second focusing electrodes being provided within the second partition walls,
• the driving unit changing a voltage application pattern between the first display electrode and the first focusing electrode and a voltage application pattern between the second display electrode and the second focusing electrode, and
• by changing the voltage application patterns, the driving unit causing the first colored particles to shift between covering the front substrate and clearing the front substrate to attach to the first partition walls and causing the second colored particles to shift between covering the back substrate and clearing the back substrate to attach to the second partition walls, in order to change a gradation of light extracted through the front of the panel.

A display device comprising:

• a panel including a front substrate and a back substrate, disposed to face each other and to enclose a light-emitting first display element and a reflective second display element in overlap in each pixel;
• and
• a driving unit configured to drive the first display element and the second display element separately,
• the second display element including partition walls partitioning adjacent pixels into cell spaces, colored particles enclosed in each cell space, and an in-plane electrode along an inner surface of the cell space, and
• the driving unit applying a voltage to the in-plane electrode to cause the colored pixels to move within the cell space in order to change an amount of light reflected after entering from the front of the panel.

A display device comprising:

• a panel including a front substrate and a back substrate, disposed to face each other and to enclose a light-emitting first display element and a reflective second display element in each pixel;
• and
• a driving unit configured to drive the first display element and the second display element separately,
• the driving unit applying a driving voltage equaling at least a threshold voltage when driving the second display element, and
• the driving unit applying a driving voltage equaling at most the threshold voltage when driving the first display element.