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Differential input circuit and driving circuit

A differential input circuit, differential input technology, used in instruments, static indicators, etc.

Active Publication Date: 2021-09-17
NOVATEK MICROELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the range of the sensed analog voltage signal is larger than the operating voltage range of the ADC

Method used

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  • Differential input circuit and driving circuit
  • Differential input circuit and driving circuit
  • Differential input circuit and driving circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] See figure 2 , which is a schematic diagram of components related to OLED and / or TFT degradation information in a pixel circuit of an OLED display device. The OLED display device 20 includes a display panel 27 , a source driver 23 , a timing controller 21 and a gate driver 25 . Both the timing controller 21 and the display panel 27 are electrically connected to the source driver 23 and the gate driver 25 .

[0022] The display panel 27 displays images using basic display elements (pixels) 271, and each basic display element 271 includes a red (R) pixel circuit 271a, a green (G) pixel circuit 271b, and a blue (B) pixel circuit 271c.

[0023] The source driver 23 may include one or more driving circuits 231, 233, and each driving circuit 231, 233 further includes an ADC 231a, 233a, a multiplexer (multipexer, referred to as MUX) 231b, 233b, a gain amplifier 231c, 233c and a plurality of differential input circuits 2311, 2313, 2315, 2331, 2333, 2335. Since the component...

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PUM

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Abstract

A differential input circuit and a driving circuit including the same are provided. The differential input circuit transforms an analog voltage signal corresponding to a sensing line on an OLED panel to a pair of differential input signals being output to a gain amplifier. The differential input circuit includes a sampling circuit and a scaling circuit. The sampling circuit receives the analog voltage signal and a reference voltage through a first scaling path and a second scaling path, respectively. The scaling circuit includes a first scaling path and a second scaling path. The first scaling path and the second scaling path collectively generate the pair of differential input signals, based on a first shift voltage, a first scaled voltage, a second shift voltage, and a second scaled voltage. The first shift voltage is less than the second shift voltage.

Description

technical field [0001] The present invention relates to a differential input circuit and a driving circuit, and in particular to a low voltage sensor with a sample and hold function that can convert a sensed voltage signal into an analog-to-digital converter (analog-to-digital converter). Differential input circuit and drive circuit for voltage input. Background technique [0002] See figure 1 , which is a schematic diagram of how an OLED pixel circuit operates. The organic light-emitting diode (OLED) panel includes OLED pixel circuits arranged in a matrix, wherein the OLED pixel circuits 17 located in the mth row and nth column can be denoted as PXL mn . OLED pixel circuit 17 via the mth data line DL m with the mth sensing line SL m And electrically connected to the source driver, and via the nth gate line GL n And electrically connected to the gate driver. Both the source driver and the gate driver receive control signals corresponding to the pixel circuits 17 from ...

Claims

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Application Information

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IPC IPC(8): G09G3/3208
CPCG09G3/3208G09G2310/0289G09G2320/04G09G3/3233G09G3/3275G09G2320/0295G09G2310/0291G09G3/3258
Inventor 林介安曾子建
Owner NOVATEK MICROELECTRONICS CORP