An organic light emitting display panel and an organic light emitting display device

Abstract

An embodiment of the present application provides an organic light-emitting display panel, including: a first pixel driving circuit for driving a first sub-pixel and a second pixel driving circuit for driving a second sub-pixel; the first pixel driving circuit includes a first driving transistor The second pixel drive circuit includes a second drive transistor; the operating current of the first sub-pixel at the preset gray scale is n times the operating current of the second sub-pixel at the preset gray scale, n≥1.5; the first drive transistor includes The first sub-drive transistor and the second sub-drive transistor; the gate of the first sub-drive transistor is electrically connected to the gate of the second sub-drive transistor; the first pole of the first sub-drive transistor is electrically connected to the first pole of the second sub-drive transistor pole; the second pole of the first sub-drive transistor is electrically connected to the second pole of the second sub-drive transistor; and the number of the second drive transistor is less than the number of the first drive transistor. In the present application, by setting the first sub-pixel with two driving transistors, the color shift caused by the voltage drop can be reduced.

Description

【Technical field】 [0001] The present invention relates to the field of display technology, in particular to an organic light emitting display panel and an organic light emitting display device. 【Background technique】 [0002] With the upgrade of consumption, due to the low efficiency of the blue sub-pixel in the organic light-emitting display panel, when the same brightness is achieved, the current I required by the blue sub-pixel b approximately red subpixel I r and Green I g Twice the sub-pixel, ie I r =I g =1 / 2I b . Due to the large-size panel design, the voltage drop of the power supply voltage away from the IC terminal of the driving chip will become larger, for example, the voltage drop away from the IC terminal is ΔV. Please refer to figure 1 , figure 1 is the Ids-Vgs curve of the drive transistor, since the slope S of the curve is smaller when the current Ids is larger, that is, the slope S of the blue sub-pixel b is less than the slope S of the green subpix...

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Problems solved by technology

Please refer to figure 1 , figure 1 is the Ids-Vgs curve of the drive transistor, since the slope S of the curve is smaller when the current Ids is larger, that is, the slope S of the blue sub-pixel b is less than the slope S of the green subpixel g or the slope S of the red subpixel r , while S b =ΔI b / ΔV;S r =ΔI r / ΔV;S g =ΔI g / ΔV so ΔI b r and ΔI b g , that is, under the same voltage drop of the power supply voltage, the blue current change is smaller than that of the red sub-pixel or the green sub-pixel, which will make the chromaticity deviate, and the far-end IC terminal will appear yellowish

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