Active matrix ESD protection and testing scheme
OwnerScott H. Holmberg, Quy Vuinventors
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Abstract
An improved method of manufacturing active matrix displays with ESD protection through final assembly and in process testing and repair capabilities. At least a first set of shorting bars is formed adjacent the row and column matrix. The shorting bars are respectively coupled to one another in series to allow testing of the matrix elements. A first shorting bar is coupled to the odd row lines, a second shorting bar is coupled to the even row lines, a third shorting bar is coupled to the odd column lines and a fourth shorting bar is coupled to the even column lines. The shorting bars can remain coupled to the matrix through final assembly to provide ESD protection and final assembly and testing capability.
Claims16
A method of manufacturing active matrix displays, including a plurality of thin film transistors, each transistor coupling a pixel to a row line and a column line in the matrix displays, wherein the improvement comprises the steps of:
- forming at least a first set of inner shorting bars adjacent to the display matrix on a first substrate, connecting in parallel a first one of said shorting bars to all the odd row lines, connecting in parallel a second one of said shorting bars to all the even row lines, connecting in parallel a third one of said shorting bars to all the odd column lines and connecting in parallel a fourth one of said shorting bars to all the even column lines;
- and
- each said shorting bar having a first resistance and connecting said shorting bars to one another in series by resistors having a magnitude one hundred times greater than the first resistance.
A display backplane for active matrix displays, including a plurality of thin film transistors, each transistor coupling a pixel to a row line and a column line in the matrix displays, wherein the improvement comprises:
- at least a first set of inner shorting bars formed adjacent to the display matrix on a first substrate, a first one of said shorting bars connected in parallel to all the odd row lines, a second one of said shorting bars connected in parallel to all the even row lines, a third one of said shorting bars connected in parallel to all the odd column lines and a fourth one of said shorting bars connected in parallel to all the even column lines;
- and
- each said shorting bar having a first resistance and said shorting bars connected to one another in series by resistors having a magnitude one hundred times greater than the first resistance.
Dependencies are inferred from the claim text.