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Driving integrated circuit and image display device including the same

A technology for driving integrated circuits and image display devices, applied in static indicators, instruments, etc., can solve problems such as low sensing voltage, calibration circuit errors, and calibration circuits not being accurately corrected.

Inactive Publication Date: 2010-11-10
SAMSUNG ELECTRONICS CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] However, since the conventional sense resistor has a resistance value of several ohms (Ω) to minimize power loss of the calibration circuit, the sense voltage output from the sense resistor is low, which causes an error in the calibration circuit
Therefore, the calibration circuit will not accurately correct the load current of the LED
Also, because the sense resistor is directly connected to the LED, the LED can undesirably turn on when the calibration circuit performs a current calibration using the direct resistive sensing method

Method used

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  • Driving integrated circuit and image display device including the same
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  • Driving integrated circuit and image display device including the same

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Embodiment Construction

[0050] This application claims Korean Patent Application No. 10-2009-0040214 filed with the Korean Intellectual Property Office on May 8, 2009 and Korean Patent Application No. 10-2009-0070484 filed with the Korean Intellectual Property Office on July 31, 2009 Priority to the patent application, the disclosures of the above two applications are incorporated herein by reference.

[0051] The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity. Like reference numerals re...

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Abstract

The present invention provides a driving integrated circuit (IC) and an image display device including the same. The driving IC includes a reference voltage setup circuit configured to output a reference voltage based on a test voltage and a load current control unit comparing a load voltage output from a load resistor with the reference voltage in response to a load current and maintaining the load current constant based on a result of the comparison.

Description

technical field [0001] Embodiments relate to a driving integrated circuit (IC), and more particularly, to a driving IC capable of performing current calibration using an indirect sensing method and an image display device including the driving IC. Background technique [0002] A driver IC is used to provide current to the LED so that the LED can emit light. Each LED can emit light with a brightness based on various characteristics of the LED (eg, the amount of current flowing through the LED, the resistance of a sense resistor used with the LED, temperature, process, etc.). Therefore, driver ICs used with LEDs require high-precision load currents. [0003] To ensure high-accuracy load current in the driver IC, a calibration circuit is required to compensate for changes in the resistance of, for example, the sense resistor connected to the LED with respect to temperature or process. Calibration circuits also require high calibration accuracy. A traditional calibration circ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/34G09G3/20
CPCG09G3/20G09G2310/0278
Inventor 金容勋
Owner SAMSUNG ELECTRONICS CO LTD
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