A glass substrate for a front filter of a display device having
considerable strength and excellent display quality, and being lightweight
is provided. A display device employing this display filter substrate is
provided. The glass substrate has one or more of electromagnetic-wave
shielding function, near infrared ray blocking function, and
anti-reflection function. The glass substrate has a thickness of 1.8-3.2
mm, an average surface compressive stress of 20-70 MPa, and a warp ratio
of the glass substrate of 1.0% or less. The surface compressive stress is
applied by an air blast cooling process or a chemical reinforcing process.
The filter substrate is disposed over a front surface of the display
device.