Abstract:
Alternating drive waveforms with zero direct voltage content for matrix or multiplexed displays are produced using low voltage, binary-level switching in the selection drive circuitry. Selection drive circuitry, and the breakdown voltage requirements thereof, are minimized by synthesizing the required high voltage waveforms applied to both the X and Y axes of display from lower amplitude components.
Abstract:
A matrix addressed display system designed so as to enable data line (22) repair by electronic mechanisms which is efficient and low in cost and thus increases yield. Such active data line (22) repair utilizes additional data driver (36) outputs, a defect map memory (48) in the TFT/LCD module and modification of the data stream to the data drivers (36) by additional circuits (42) between the display and the display adapter. A bus configuration on the display substrate is utilized which combines repair flexibility, low parasitic capacitance, and the ability to easily make the necessary interconnections. The number of interconnections is kept to a minimum, the connections are reliable, and the connections may be made with conventional wire bond or laser bond technology, or disk bond technology.
Abstract:
PROBLEM TO BE SOLVED: To make possible easily and inexpensively repairing an omission in a data line by selectively activating a selected non-committed data driver and providing a data signal on a conductive line. SOLUTION: In an array 32, the number of output lines of respective data drivers 36 are increased for adding an auxiliary driver to a glass panel 34. An electric connector used for connecting an LCD panel to a data source of a host computer, etc., requires a PROM chip selecting excess line only by a piece, and other PROM signals are multiplexed by existing lines. After reset, a controller 42 decides when the input data are lapped in a temporary memory from an address in a defective map for using on an auxiliary line 38. The data supplied to a display are corrected related to defective line information stored in the memory, and the selected non-committed data driver 36 is a ctivated selectively, and the data signal is provided on the conductive line.
Abstract:
A matrix addressed display system designed so as to enable data line (22) repair by electronic mechanisms which is efficient and low in cost and thus increases yield. Such active data line (22) repair utilizes additional data driver (36) outputs, a defect map memory (48) in the TFT/LCD module and modification of the data stream to the data drivers (36) by additional circuits (42) between the display and the display adapter. A bus configuration on the display substrate is utilized which combines repair flexibility, low parasitic capacitance, and the ability to easily make the necessary interconnections. The number of interconnections is kept to a minimum, the connections are reliable, and the connections may be made with conventional wire bond or laser bond technology, or disk bond technology.
Abstract:
An array of thin film transistor (TFT) devices is provided with a conductive region, such as a strip, for temporarily coupling a floating pel electrode of each of the plurality of TFT devices to a conductor on an underlying substrate. The conductor may be a row or column metalization line associated with an adjacent row or column of the array. The conductive strip may therefore be utilized, in conjunction with appropriate voltage potentials and test circuitry, to test each of the TFT devices prior to the final fabrication of the TFT array into a completed flat panel display. Thus, nonfunctioning or out of specification arrays may be identified at an early point in the manufacturing cycle of the display. The strip may be comprised of amorphous silicon which is illuminated during the test in order to reduce the intrinsic resistance of the strip. The strip may also be comprised of a layer of metalization, which layer is removed from the array at the completion of the test.
Abstract:
A matrix addressed display system designed so as to enable data line (22) repair by electronic mechanisms which is efficient and low in cost and thus increases yield. Such active data line (22) repair utilizes additional data driver (36) outputs, a defect map memory (48) in the TFT/LCD module and modification of the data stream to the data drivers (36) by additional circuits (42) between the display and the display adapter. A bus configuration on the display substrate is utilized which combines repair flexibility, low parasitic capacitance, and the ability to easily make the necessary interconnections. The number of interconnections is kept to a minimum, the connections are reliable, and the connections may be made with conventional wire bond or laser bond technology, or disk bond technology.
Abstract:
A matrix addressed display system designed so as to enable data line (22) repair by electronic mechanisms which is efficient and low in cost and thus increases yield. Such active data line (22) repair utilizes additional data driver (36) outputs, a defect map memory (48) in the TFT/LCD module and modification of the data stream to the data drivers (36) by additional circuits (42) between the display and the display adapter. A bus configuration on the display substrate is utilized which combines repair flexibility, low parasitic capacitance, and the ability to easily make the necessary interconnections. The number of interconnections is kept to a minimum, the connections are reliable, and the connections may be made with conventional wire bond or laser bond technology, or disk bond technology.