Display panel and method for driving same

A display panel and driver technology, applied to static indicators, instruments, electrical components, etc., can solve problems such as poor display, and achieve the effect of preventing poor movement

Inactive Publication Date: 2020-02-14
SAKAI DISPLAY PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the high-definition of liquid crystal display panels, the load on the driver increases, and display defects may occur due to heat generated by the driver.

Method used

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  • Display panel and method for driving same
  • Display panel and method for driving same
  • Display panel and method for driving same

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Experimental program
Comparison scheme
Effect test

no. 1 approach

[0034] figure 1 It is a schematic diagram of the display device 1 in the first embodiment. The display device 1 includes a display panel 10 and a backlight device 11 . exist figure 1 A longitudinal section of the display panel 10 is shown in FIG. The backlight device 11 irradiates the display panel 10 with light. The display panel 10 displays an image using the light irradiated by the backlight device 11 .

[0035] The display panel 10 includes: a TFT substrate 20 ; a color filter substrate (hereinafter referred to as a “CF substrate”) 21 arranged on the front side of the TFT substrate 20 ; and a liquid crystal layer arranged between the TFT substrate 20 and the CF substrate 21 twenty three. The sealing portion 22 bonds the TFT substrate 20 and the CF substrate 21 to each other, and seals the liquid crystal layer 23 . The plurality of pixel electrodes (not shown) included in the TFT substrate 20 and the common electrode 21 a included in the CF substrate 21 are arranged t...

no. 2 approach

[0094] Figure 7 It is a flowchart showing the procedure of protection processing in the second embodiment.

[0095] Hereinafter, the difference from the first embodiment will be described with respect to the second embodiment. Since the structure other than the structure mentioned later is the same as that of the first embodiment, the same components as those of the first embodiment are given the same reference numerals as those of the first embodiment, and the description thereof will be omitted.

[0096] The display device 1 in the second embodiment differs from the display device 1 in the first embodiment in that the protection processing executed by the control unit 70 of the control circuit 50 included in the display panel 10 is different.

[0097] Like the first embodiment, the control unit 70 periodically executes the protection process in the second embodiment. Steps S21 to S23 and S27 to S29 of the protection process in the second embodiment are the same as steps S...

no. 3 approach

[0106] Figure 8 It is an explanatory diagram of the control circuit 50 and the monitoring circuits 35ru, 35rb, 35fu, and 35fb in the third embodiment.

[0107] Hereinafter, the difference from the first embodiment will be described with respect to the third embodiment. Since the structure other than the structure mentioned later is the same as that of the first embodiment, the same components as those of the first embodiment are given the same reference numerals as those of the first embodiment, and the description thereof will be omitted.

[0108] In the third embodiment, the temperature difference detection circuit is based on the drain current of the first TFT and the second TFT when a predetermined DC voltage is supplied to the gates of the first TFT and the second TFT formed close to the driver. of the drain current, while detecting the difference between the temperature of the first TFT and the temperature of the second TFT.

[0109] The display panel 10 in the third ...

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PUM

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Abstract

A display panel according to an embodiment of the present invention includes at least one driver integrally formed in a surrounding region, a plurality of monitor TFTs formed near the at least one driver, and including a. first TFT and a second TFT, and a temperature difference detection. circuit for detecting a difference between a temperature of the first TFT and a temperature of the second TFT,the basis of a first gate voltage of the first TFT and a second gate voltage of the second TFT that occur when a predetermined current is supplied to a drain of each of the first and second TFTs. Thetemperature difference detection circuit may detect a difference between a temperature of the first TFT and a temperature of the second TFT, on the basis of a first drain current of the first TFT anda second drain current of the second TFT that occur when a predetermined direct-current voltage is supplied to a gate of each of the first and second TFTs.

Description

technical field [0001] The present invention relates to an active matrix display panel (for example, a liquid crystal display panel or an organic EL display panel) and a driving method thereof, in particular, to a driver monolithic display panel in which a driver is integrally formed in the display panel, and a driving method thereof. its driving method. Background technique [0002] An active matrix type display panel typically has a plurality of pixels arranged in rows and columns, and at least one thin film transistor (hereinafter referred to as "TFT") is provided for each pixel. For example, in an active matrix type liquid crystal display panel, each pixel includes a pixel electrode and a common electrode (also referred to as a “counter electrode”) arranged to face the pixel electrode via a liquid crystal layer. The pixel electrode It is electrically connected to the drain of the TFT provided for each pixel. The gate of the TFT is electrically connected to a gate line ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36G09G3/3225
CPCG09G3/3225G09G3/3648G09G3/3677G09G2300/0408G09G2330/045H02H1/0007H02H7/205
Inventor 清水由幸
Owner SAKAI DISPLAY PROD
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