Unlock instant, AI-driven research and patent intelligence for your innovation.

Electric current control circuit for display equipment

A current control circuit and circuit technology, applied in static indicators, nonlinear optics, instruments, etc., can solve problems such as dealing with faulty current control circuits

Inactive Publication Date: 2002-02-13
LG DISPLAY CO LTD
View PDF0 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0028] An object of the present invention is to provide a current control circuit for a display device that can solve problems caused by processing errors in the manufacture of the display device

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Electric current control circuit for display equipment
  • Electric current control circuit for display equipment
  • Electric current control circuit for display equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0046] Now, preferred embodiments of the present invention will be described in detail, and the embodiments will be described with reference to the accompanying drawings.

[0047] The current control circuit based on the high voltage device according to the first embodiment of the present invention will refer to image 3 to describe.

[0048] refer to image 3 , the current control circuit for a display device includes a current mirror circuit 10, a current setting unit Iset, and a switching element Qc. The current mirror circuit 10 includes a first PMOS transistor Qp1 and a second PMOS transistor Qp2 both of which are high-voltage electronic devices, and passes a current equivalent to a power supply voltage HVDD through two output terminals.

[0049] The current setting unit Iset is connected to the drain of the second PMOS FET Qp2 corresponding to one of the two output terminals, and controls the current iL flowing through the load 20 connected to the drain of the first PM...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A current control circuit for a display device is disclosed. The current control circuit for a display device includes a current mirror circuit consisted of high voltage electronic devices, for outputting current equivalent to a power source voltage to a load, a current set unit connected with the current mirror circuit, for setting a value of the current flowing in the load, and a switching element connected with the current mirror circuit, for switching the operation of the current set unit through an external control signal. An amount of the current applied to the load can accurately be controlled due to nonlinear characteristic of the high voltage devices.

Description

technical field [0001] The present invention relates to a current control circuit for a display device, in particular to a passive current control circuit based on high voltage equipment. Background technique [0002] Recently, the flat panel display market has developed rapidly. [0003] The flat display developed from the original liquid crystal display (LCD) has attracted much attention. Cathode ray tubes (CRTs), which have been widely used in the display field in recent decades, have recently been replaced by plasma display panels (PDPs), visible fluorescent displays (VFDs), field emission displays (FEDs), light emitting diodes (LEDs) and electric Luminescent (EL) flat panel display replacement. [0004] Recently, there are two methods of driving a display device. One is a passive type driving method used in a simple matrix. The other is an active type driving method used in a thin film transistor (TFT)-LCD. The active driving method is a voltage driving type, and i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G09G3/36
CPCG09G3/3681G09G3/3692G09G3/3611
Inventor 金学洙罗永宣
Owner LG DISPLAY CO LTD