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Semiconductor integrated circuit, liquid crystal driver circuit, and liquid crystal display apparatus

A liquid crystal drive circuit and integrated circuit technology, which is applied in the direction of electrical components, static indicators, instruments, etc., can solve the problems of rising test costs and achieve the effects of shortening time, increasing the number, and saving test costs

Inactive Publication Date: 2010-09-22
SONY CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The result is an unrestricted increase in the cost of testing

Method used

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  • Semiconductor integrated circuit, liquid crystal driver circuit, and liquid crystal display apparatus
  • Semiconductor integrated circuit, liquid crystal driver circuit, and liquid crystal display apparatus
  • Semiconductor integrated circuit, liquid crystal driver circuit, and liquid crystal display apparatus

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Embodiment Construction

[0035] Now, preferred embodiments of the present invention will be described. It will be described under the following headings:

[0036] 1. Overview of semiconductor integrated circuits

[0037] 2. Structure and operation of liquid crystal drive circuit and liquid crystal display device equipped with it

[0038] 3. Other implementation methods

[0039] [1. Overview of semiconductor integrated circuits]

[0040] Now, a semiconductor integrated circuit embodying the present invention will be described in specific terms with reference to the drawings. figure 1 and image 3 shows the structure of a semiconductor integrated circuit as an embodiment of the present invention, and Figure 2A and Figure 2B The operation of the invented semiconductor integrated circuit is illustrated.

[0041] Such as figure 1 As shown, the semiconductor integrated circuit 1 realizing the present invention includes: a first D / A converter 10; a second D / A converter 11; an amplifier 12 for ampli...

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PUM

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Abstract

A semiconductor integrated circuit is disclosed which includes: a first D / A converter; a second D / A converter; an amplifier configured to amplify an output of the first D / A converter; an operational amplifier configured to input an output of the second D / A converter; and a selector configured to effect switchover between a normal mode and a test mode, the normal mode being a mode in which the operational amplifier is caused to function as an amplifier for amplifying the output of the second D / A converter, the test mode being a mode in which the operational amplifier is caused to function as a comparator for comparing the output of the second D / A converter with the output of the first D / A converter. According to the present invention, it is thus possible to reduce the number of probes to be attached to output nodes upon device testing while curbing the packaging area of each device, whereby the number of the devices that can be tested simultaneously is increased.

Description

[0001] References to related applications [0002] The present invention contains subject matter of Japanese Patent Application No. 2009-011153 filed in the Japan Patent Office on Jan. 21, 2009, the entire content of which is hereby incorporated by reference. technical field [0003] The present invention relates to a semiconductor integrated circuit, a liquid crystal drive circuit, and a liquid crystal display device equipped with a digital-to-analog (D / A) converter and an amplifier for amplifying the output of the D / A converter. Background technique [0004] Well-known semiconductor integrated circuits are each provided with a plurality of D / A converters and a plurality of amplifiers for amplifying the outputs of these D / A converters. An example of such a semiconductor integrated circuit is a liquid crystal drive circuit that outputs drive signals for driving a plurality of pixels arranged on a liquid crystal panel. [0005] Such as Figure 14 As shown, the semiconductor ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
CPCH03M1/662H03M1/109G09G3/006G09G2310/027G09G3/3688H03M1/108G09G2330/12
Inventor 兵头健司一里塚尚志木本卓也东乡实
Owner SONY CORP
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