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Display device and method for detecting state thereof

A display device and state detection technology, applied in static indicators, nonlinear optics, instruments, etc., can solve the problem that the driving circuit cannot easily detect abnormalities

Inactive Publication Date: 2020-01-17
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the conventional liquid crystal display device, since the internal state of the drive circuit cannot be known from the outside, when an abnormality occurs in the drive circuit, the occurrence of the abnormality may not be easily detected.

Method used

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  • Display device and method for detecting state thereof
  • Display device and method for detecting state thereof
  • Display device and method for detecting state thereof

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0063] figure 1 It is a block diagram showing the configuration of the liquid crystal display device according to the first embodiment of the present invention. figure 1 The illustrated liquid crystal display device 10 has a liquid crystal panel 11 , a drive circuit 12 , and an FPC 13 . The drive circuit 12 is mounted on the liquid crystal panel 11 . The liquid crystal display device 10 is connected to the video signal source 5 during normal operation. Liquid crystal panel 11 and video signal source 5 are electrically connected using FPC13. The video signal source 5 supplies the liquid crystal panel 11 with a power supply voltage PW, a synchronization signal SS, and a video signal VS through the FPC 13 . FPC 13 functions as a connection portion that electrically connects liquid crystal panel 11 and video signal source 5 .

[0064] The liquid crystal panel 11 includes a display unit 14 . The display unit 14 includes a plurality of scan lines 15 , a plurality of data lines ...

no. 2 approach

[0092] Image 6 It is a diagram showing a connection state when testing the liquid crystal display device according to the second embodiment. Image 6 The illustrated liquid crystal display device 70 has a liquid crystal panel 71 , a drive circuit 12 and an FPC 73 . Among the constituent elements of the present embodiment, the same elements as those of the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Differences from the first embodiment will be described below.

[0093] In liquid crystal display device 70 , drive circuit 12 is mounted not on liquid crystal panel 11 but on FPC 13 . The bumps 57 of the drive circuit 12 are connected to the data lines 16 via wiring (not shown) formed on the FPC and wiring (not shown) formed on the liquid crystal panel 11 . The bumps 58 of the driving circuit 12 are electrically connected to the scanning line driving circuit 18 through the wiring formed on the FPC and the wiring formed o...

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Abstract

A display device includes a display panel, a connecting section for electrically connecting the display panel with an external equipment, and a drive circuit mounted on the display panel or the connecting section and for outputting an internal signal as a state signal, and is configured to make the state signal propagate to the external equipment via the connecting section. The drive circuit outputs, as the state signal, an output signal of a power supply circuit included in the drive circuit, or a signal applied to an output terminal connected to a data line of the display panel or a wiring electrically connected to a scanning line drive circuit formed on the display panel. With this, a display device capable of easily detecting an abnormality which occurs in the drive circuit is provided.

Description

technical field [0001] The present invention relates to a display device such as a liquid crystal display device and a state detection method of the display device. Background technique [0002] Liquid crystal display devices are widely used as thin, lightweight, and low power consumption display devices. A liquid crystal display device is used when connected to a video signal source during normal operation. The liquid crystal panel and the video signal source are electrically connected using, for example, a flexible printed circuit (FPC: hereinafter referred to as FPC). The video signal source provides a power supply voltage, a control signal and a video signal to the liquid crystal display device. [0003] In a liquid crystal display device, a drive circuit that operates based on a power supply voltage supplied from a video signal source, a control signal, and a video signal is mounted on a liquid crystal panel. Alternatively, the drive circuit may be mounted on the FPC...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/00
CPCG09G3/006G09G2310/0278G09G3/2092G09G2330/021G09G3/3648G09G2300/0426G09G3/3696G09G3/3677G09G3/3688G09G2330/12G09G2300/0408G02F1/133305G02F1/136286
Inventor δ»ŠδΊ•ι›…εš
Owner SHARP KK