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

Electric level converter and active matrix type indicator using same

A technology for a level converter and a display device, which is applied in the fields of logic circuit coupling/interface, logic circuit connection/interface arrangement, and instruments using field effect transistors, and can solve the problem of low output signal of the level converter.

Inactive Publication Date: 2004-04-14
SANYO ELECTRIC CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, since the positive power supply 56 is input to the inverter 53 through the second p-channel transistor 52, the output signal Sig2 of the level shifter is low.

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 level converter and active matrix type indicator using same
  • Electric level converter and active matrix type indicator using same
  • Electric level converter and active matrix type indicator using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0029] figure 1 It is a circuit diagram of the level shifter of this embodiment. The level shifter of this embodiment has: the 1st p-channel transistor 11, the 2nd p-channel transistor 12, the inverter 13, the 1st n-channel transistor 14, the 2nd n-channel transistor 15, the 3rd n-channel transistor 16, the 3rd n-channel transistor 4 n-channel transistor 17, positive power supply 18, and negative power supply 19.

[0030] Invert signal that inverts the input signal * While Sig1 is input to the gate of the first p-channel transistor 11 and the gate of the first n-channel transistor 14, the input signal Sig1 is input to the gate of the second p-channel transistor 12 and the gate of the second n-channel transistor 15. . The first p-channel transistor 11, the first n-channel transistor 14, and the third n-channel transistor 16 are sequentially connected in series, and the second p-channel transistor 12, the second n-channel transistor 15, and the fourth n-channel transistor 17...

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

The level shifter of the gate line selector in the active matrix type display device generates the through current to raise the power consumption in the prior art. To solve the above problem, the present invention provides a level shifter, wherein a p-channel transistor 11 and an n-channel transistor 14 are connected in series between a positive power supply 18 and a negative power supply 19, while a p-channel transistor 12 and an n-channel transistor 15 are also connected in series. An inverted input signal *Sig1 is inputted into the respective gates of the transistors 11 and 14, while an input signal Sigl is inputted into the respective gates of the transistors 12 and 15. When one transistor turns ON, the other transistor turns OFF. Thus, generation of through current is prevented. The level shifter is inserted between the gate line selector 6 of the active matrix display device and the gate line 3.

Description

technical field [0001] The invention relates to a level shifter for converting an input voltage of a specific voltage range into an output voltage of a different voltage range, in particular to a gate line driver suitable for an active matrix display device. Background technique [0002] Existing display devices can be roughly classified into passive type and active matrix type. Among them, an active matrix type display device is a display device in which a switching element is provided for each pixel, and a voltage (or current) corresponding to the image data of the pixel is applied to each pixel to perform display. [0003] A liquid crystal display device is a display device that displays by sealing liquid crystal LC between facing substrates, applying voltage to the pixel electrodes formed in each pixel, and changing the transmittance of liquid crystals. Active matrix LCDs are mainly used For monitoring purposes. [0004] In addition, the electroluminescent display devi...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/136G02F1/133G02F1/1368G09G3/20G09G3/36H01L29/786H03K19/0185
CPCG09G2310/0289G09G3/3677G02F1/133
Inventor 松本昭一郎古宫直明奥山正博广泽考司
Owner SANYO ELECTRIC CO LTD