Liquid crystal display device

A liquid crystal display device comprising:

• a liquid crystal display panel with an electrically controlled birefringence (ECB) mode in a normally black mode;
• a light source configured to irradiate the ECB mode liquid crystal display panel with red (R) light, green (G) light, and blue (B) light;
• and
• a controller configured to drive the light source to time-divisionally irradiate the ECB mode liquid crystal display panel,
• the liquid crystal display device being configured to switch between an image display state, by using a field sequential driving system where each frame period includes subframe periods, and a transparent display state, allowing a background to be seen through,
• the ECB mode liquid crystal display panel comprising, sequentially in the following order:
• a first polarizing plate;
• a first substrate including pixel electrodes arranged in a row direction and a column direction in a matrix pattern;
• a first alignment film;
• a liquid crystal layer formed from a liquid crystal material containing liquid crystal molecules;
• a second alignment film;
• a second substrate including a common electrode;
• and
• a second polarizing plate, wherein:
• the liquid crystal layer, during no voltage application, includes a first domain and a second domain with different alignment vectors from each other, wherein an alignment vector is defined to start at an initial point corresponding to first substrate side long axis ends of liquid crystal molecules and to end at a terminal point corresponding to second substrate side long axis ends of the liquid crystal molecules,
• in a plan view of the first domain and the second domain, the alignment vector of the first domain and the alignment vector of the second domain are parallel to each other,
• a liquid crystal alignment axis in the first domain and a liquid crystal alignment axis in the second domain to cross a polarization axis of the first polarizing plate at a same azimuthal angle and to cross a polarization axis of the second polarizing plate at a same azimuthal angle,
• the liquid crystal alignment axis in the first domain and the liquid crystal alignment axis in the second domain are parallel to the row direction, and
• the first domain and the second domain are arranged side by side in the column direction.