Led display device and method for controlling the same

Claim 2

A light emitting diode display device comprising: a matrix circuit in which light emitting diodes are arranged in a matrix consisting of rows and columns; row driver having a plurality of output terminals, each output terminal electrically coupled to a respective row of said matrix circuit for driving a plurality of light emitting diodes on each respective row of said matrix circuit, each corresponding light emitting diode along each of the rows being connected in a direction orthogonal to the row direction to form corresponding columns of connected light emitting diodes; a sample hold circuit connected to said row driver for sample holding a received analogue display data based on a sample hold signal being supplied from a signal generating circuit; and an analogue switch connected to said sample hold circuit respectively selecting display data for a plurality of light emitting diodes on the respective rows in said matrix circuit based on a switching signal being supplied from an external source.

Claim 3

The device of claim 1, wherein the signal generating circuit is electrically coupled to said analogue switch to act as said external source as well as supplying said sample hold signal.

Claim 4

The device of claim 2, wherein said signal generating circuit comprises a data counter for counting a clock signal supplied externally, and a data decoder for decoding count values obtained by said data counter to generate said switching signal and said sample hold signal.

Claim 5

A device of claim 1, further comprising: (f) a scan driver electrically coupled to the light emitting diode arranged in respective columns in said matrix circuit; (g) a scan decoder connected to said scan driver; and (h) a scan counter connected to said scan decoder.

Claim 6

The device of claim 1, wherein said matrix circuit forms a part of a light emitting diode unit, and a large size module panel is formed by arranging a plurality of said light emitting diode units in parallel.

Claim 7

The device of claim 1, wherein resistors are serially connected to respective light emitting diode constituting said matrix circuit.

Claim 8

The device of claim 1, wherein said analogue switch has a number of input terminals corresponding to the number of said columns in said matrix and a number of output terminals.

Claim 9

The device of claim 7, wherein the number of analogue switch output terminals also corresponds to the number of said columns.

Claim 10

The device of claim 1, wherein said matrix has m rows and n columns, and said analogue switch has m input terminals and m output terminals, m an n being positive integer greater than 1.

Claim 11

The device of claim 9, wherein said sample hold circuit transfers m kinds of the display data so as to drive the plurality of light emitting diodes on said respective rows.

Claim 12

A light emitting diode display device comprising: a computer for generating analogue display data, horizontal synchronizing signals, and vertical synchronizing signals; a timing controller connected to said computer for receiving said horizontal synchronizing signals and said vertical synchronizing signals; an interface directly connected to said timing controller and said computer for outputting said analogue display data, said horizontal synchronizing signals, vertical synchronizing signals, a clock signal and an enable signal; a buffer connected to said interface; and a module panel connected to said buffer, said module panel including a plurality of light emitting diode units arranged in parallel with each unit further comprising: a matrix circuit of light emitting diodes having plural diodes connected together to form individual rows with corresponding diodes in each row connected in a direction orthogonal to the rows to form plural columns, a row driver having a different output connected to each row of diodes in the matrix circuit, a sample and hold circuit connected to supply inputs to said row driver relative to sampled and held analog display data received from analogue switch connected to the interface through the buffer; and wherein the analog switch and the sample and hold circuit are controlled by the clock signal, the horizontal synchronizing signals, and the enable signal provided from the interface.

Claim 13

A light emitting diode display device comprising: a computer for generating analogue display data, horizontal synchronizing signals, and vertical synchronizing signals; a timing controller connected to said computer for receiving said horizontal synchronizing signals and said vertical synchronizing signals; an interface directly connected to said timing controller and said computer for outputting said analogue display data, said horizontal synchronizing signals, vertical synchronizing signals, a clock signal and an enable signal; a buffer connected to said interface; and a module panel connected to said buffer, said module panel including a plurality of light emitting diode units arranged in parallel with each unit further comprising: a matrix circuit of light emitting diodes having plural diodes connected together to form individual rows with corresponding diodes in each row connected in a direction orthogonal to the rows to form plural columns, a row driver having a different output connected to each row of diodes in the matrix circuit, a sample and hold circuit connected to supply inputs to said row driver relative to sampled and held analog display data received from analogue switch connected to the interface through the buffer; and wherein the analog switch and the sample and hold circuit are controlled by the clock signal, the horizontal synchronizing signals, and the enable signal provided from the interface.

Claim 14

The device of claim 11, wherein said computer and said interface, said interface and said buffer, and said buffer and said LED units are respectively connected together by pairs by analogue data lines.

Claim 15

The device of claim 12, wherein said computer and said interface are connected by only four analogue data lines.

Claim 18

The method of claim 14, wherein the step of selecting display data is controlled synchronously with a leading edge of a clock pulse.

Claim 19

The method of claim 14, wherein the step of sample-holding is controlled synchronously with a trailing edge of a clock pulse.