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Display device driving circuit

A technology for driving circuits and circuits, applied in the direction of electric light sources, electrical components, static indicators, etc.

Inactive Publication Date: 2012-02-29
INTERDIGITAL CE PATENT HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Still further, some display devices may require different voltage levels on different control lines connected to the control elements of a single display element

Method used

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  • Display device driving circuit
  • Display device driving circuit
  • Display device driving circuit

Examples

Experimental program
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Embodiment Construction

[0024] figure 1 A block diagram of the drive circuit 100 of the present invention is shown. The driving circuit 100 includes a shift register 200 , a latch circuit 300 , a switch unit 400 and a register 500 . Shift register 200 is a serial output n-bit shift register with n parallel outputs. Therefore, n latch circuits 300, switch units 400 and buffers 500 are provided. Correspondingly, the output terminal of the driving circuit 100 has n output lines.

[0025] figure 2 A block diagram of the switch unit 400 is shown. The switch unit 400 has a core circuit 401 supplied with signals LS, CS1, CS2, ALL_ON, and POL_REV. The switch core 401 also includes an output terminal OUT. Signal LS is an enable signal from latch circuit 300 . Signals CS1 and CS2 are used to control the pulse width and / or pulse shape of the output signal. The control signals CS1 and CS2 can also control the maximum and minimum voltages of the output signal OUT. The signals ALL_ON and POL_REV are prov...

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PUM

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Abstract

A driving circuit for a display with display elements in rows and / or columns has a shift register, through which tokens are shifted. The shift register's parallel outputs are latched and enable switch cells depending on the tokens. Control signals are supplied to the switch cells which control the output signal in terms of pulse width and / or signal shape. Buffers output the signals to a connecteddisplay. Individual or groups of buffers are connected to different supply voltages. The shift register may have more than one input in order to allow for shifting tokens in parallel, e.g. to every second output, using only one clock cycle. Further, inputs are provided for inverting the travelling direction of the tokens, inverting the shape of the signal that is output or switching all outputs to a predetermined state.

Description

technical field [0001] The invention relates to a driver circuit for a display device, in particular a display device with display elements arranged in rows and / or columns. A display device according to the invention is, for example, a device using organic light emitting diodes, often abbreviated OLED or LCD device. The drive circuit is especially suitable for use in active matrix displays. Background technique [0002] Active matrix displays have switching elements or other control elements associated with the display elements. Driver circuits are used to select rows or columns of the display, enabling addressing of control elements associated with display elements. Once the display element is addressed, a voltage or current can be applied to the control element to set the display element to a desired state. However, different driving methods are required for different types of display elements. Also, it is expected that split screen applications can be driven. Still f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/20H05B33/08H05B44/00
CPCG09G2300/0842G09G2300/0861G09G3/325G09G2310/0286G09G3/20G09G2310/0205G09G2310/0224G09G3/3266G09G3/30G09G3/36
Inventor 托马斯·施万恩伯格海因里希·谢曼西洛·马克斯
Owner INTERDIGITAL CE PATENT HLDG