Memory device with one-time programmable function, and display driver IC and display device with the same
View Patent ↗A display driver IC with a built-in memory device having a one-time programmable function is provided. The memory device includes: a cell array comprising a plurality of one-time programmable unit cells and configured to receive a writing voltage generated from an internal voltage generating unit to operate upon writing operation; a detecting unit configured to detect a change of the writing voltage; and a controlling unit configured to control the internal voltage generating unit and the unit cells according to an output signal of the detecting unit.
1. A display device, comprising:
a display panel; and
a driver integrated circuit (IC) comprising
a built-in internal voltage generating unit configured to generate an internal voltage,
a built-in memory device having a one-time programmable function,
a first pad configured to output the internal voltage, and
a second pad configured to receive a writing voltage of the memory device,
wherein the display panel comprises:
first and second connection ports connected to the respective first and second pads upon mounting of the driver IC; and
a first substrate, an internal interconnection configured to interconnect the first and second connection ports being disposed on the first substrate; and
wherein the built-in memory device receives the internal voltage generated from the built-in internal voltage generating unit as a writing voltage through the second pad.
2. The display device of claim 1 , wherein the driver IC is mounted in any one of a chip on glass type, a chip on film type and a tape carrier package type.
3. The display device of claim 1 , further comprising:
a conductive connection number formed on the first and second connection ports.
4. The display device of claim 3 , wherein the conductive connection number is an anisotropic conductive film or a solder.
5. The display device of claim 1 , wherein the first and second connection ports comprise any one of indium tin oxide, indium zinc oxide, an alloy of tin and aurum, chromium, aurum and aluminum.
6. The display device of claim 1 , wherein the internal interconnection comprises any one selected from the group consisting of Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Ni, Ti, Co, Cu, Pt, W, Cr, Mo, Au, Ag, Zn, Ir, Ta, Hf, K, Li, Cs, Al, and an alloy thereof.
7. The display device of claim 1 , wherein the display panel comprises:
a second substrate connected to the first substrate; and a liquid crystal layer injected between the first and second substrates.
8. The display device of claim 1 , wherein the first pad connects to an output terminal of the built-in voltage generating unit; the second pad connects an input terminal of the built-in memory device; and the built-in memory device receives the internal voltage generated from the built-in internal voltage generating unit as the writing voltage through the second pad and performs the one-time programmable function without receiving an external voltage as the writing voltage during the writing operation of the built-in memory device.
9. The display device of claim 1 , wherein the writing operation of the built-in memory device involves a dielectric breakdown of a dielectric material in an anti-fuse in the built-in memory device.
10. The display device of claim 9 , wherein the anti-fuse comprises a capacitor or a transistor.