A display device, its driving circuit and its driving method
A technology for driving circuits and display devices, applied in static indicators, instruments, etc., can solve the problem of inability to test the luminous intensity of light-emitting diodes
Active Publication Date: 2018-08-10
LENOVO (BEIJING) LTD
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Problems solved by technology
[0003] Existing display devices made of light-emitting diodes can only test the luminous intensity of the light-emitting diodes in all pixel units as a whole, and cannot test the luminous intensity of the light-emitting diodes of a single pixel when performing performance tests.
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[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0040] In the prior art, when performing a luminous intensity test on a display device composed of light-emitting diodes, only the luminous intensity of the light-emitting diodes in all pixel units can be tested, and the luminous intensity of the light-emitting diodes of a single pixel cannot be tested. Therefore, when the display device is maintained, it is not easy to determine the location of the defective pixel, and it is inconvenient...
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The invention discloses a display device, and a driving circuit and a driving method thereof. The driving circuit comprises a scanning transistor, a driving transistor, a storage capacitor and a photocurrent detection device, wherein the gate of the scanning transistor is connected with a scanning signal, and the source is connected with a data signal; the gate of the driving transistor is connected with the drain of the scanning transistor, the drain is connected with a voltage source and the source is grounded via a light emitting diode; the anode of the light emitting diode is connected with the source of the driving transistor, and the cathode of the light emitting diode is grounded; one polar plate of the storage capacitor is connected with the voltage source, and the other polar plate is connected with the gate of the driving transistor; the photocurrent detection device is connected with the gate of the scanning transistor; the photocurrent detection device is used for acquiring photocurrent generated when the scanning transistor senses light emitted by the light emitting diode after the scanning transistor is cut off; and the driving circuit can realize test on the light emitting strength of the light emitting diode.
Description
Technical field [0001] The present invention relates to the field of display technology, and more specifically to a display device and its driving circuit and its driving method. Background technique [0002] Light-emitting diodes are classified into organic light-emitting diodes (OLED) and inorganic light-emitting diodes (LED) according to their chemical properties. Display devices made of light-emitting diodes have become one of the mainstream display devices due to their advantages such as high brightness, long service life, and large viewing angles. [0003] When performing a performance test on a display device made of an existing light-emitting diode, it can only test the luminous intensity of the light-emitting diodes in all pixel units, and cannot test the luminous intensity of the light-emitting diodes of a single pixel. Summary of the invention [0004] In order to solve the above-mentioned problems, the technical solution of the present invention provides a display devic...
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IPC IPC(8): G09G3/32
Inventor 龙浩阳光张振华
Owner LENOVO (BEIJING) LTD