US 2019/0097076 A1Published application

Microfluidic system and method for driving the same

AssigneeBoe Technology Group Co., Ltd.

InventorsXueyou CAO, Xue DONG, Haisheng WANG, Xiaoliang DING, Yingming LIU, Yanling HAN, Yuzhen GUO, Pengpeng WANG, Chihjen CHENG, Ping ZHANG, Wei LIU, Likai DENG, Yangbing LI

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Abstract

A microfluidic system includes a liquid drop accommodation space, an array of photosensitivity detection circuits and an array of driving circuits between an upper substrate and a lower substrate. Each photosensitivity detection circuit includes a photosensitive transistor and a first gating transistor. The photosensitive transistor has a gate electrode coupled to a first scan signal line, a source electrode coupled to a first power supply voltage signal line, and a drain electrode coupled to a source electrode of the first gating transistor. The first gating transistor has a gate electrode coupled to a second scan signal line, and a drain electrode coupled to a read signal line. Each driving circuit includes a driving transistor and a driving electrode. The driving transistor has a gate electrode coupled to a third scan signal line, a source electrode coupled to a data signal line, and a drain electrode coupled to the driving electrode.

Claims20

Dependent claims

A microfluidic system comprising:

an upper substrate;
a lower substrate that is opposite to the upper substrate;
a liquid drop accommodation space between the upper substrate and the lower substrate;
a first hydrophobic layer at an outermost surface of the upper substrate, and the outermost surface of the upper substrate facing the liquid drop accommodation space;
a second hydrophobic layer at an outermost surface of the lower substrate, and the outermost surface of the lower substrate facing the liquid drop accommodation space;
a common electrode layer between the upper substrate and the lower substrate;
an array of photosensitivity detection circuits between the lower substrate and the second hydrophobic layer;
and
an array of driving circuits between the lower substrate and the second hydrophobic layer;
wherein each photosensitivity detection circuit includes a photosensitive transistor and a first gating transistor;
wherein a gate electrode of the photosensitive transistor is coupled to a first scan signal line, a source electrode of the photosensitive transistor is coupled to a first power supply voltage signal line, and a drain electrode of the photosensitive transistor is coupled to a source electrode of the first gating transistor;
wherein a gate electrode of the first gating transistor is coupled to a second scan signal line, and a drain electrode of the first gating transistor is coupled to a read signal line;
and
wherein each driving circuit includes a driving transistor and a driving electrode;
a gate electrode of the driving transistor is coupled to a third scan signal line, a source electrode of the driving transistor is coupled to a data signal line, and a drain electrode of the driving transistor is coupled to the driving electrode.

12 more elements

A microfluidic system comprising:

an upper substrate;
a lower substrate that is opposite to the upper substrate;
a liquid drop accommodation space between the upper substrate and the lower substrate;
a first hydrophobic layer at an outermost surface of the upper substrate, and the outermost surface of the upper substrate facing the liquid drop accommodation space;
a second hydrophobic layer at an outermost surface of the lower substrate, and the outermost surface of the lower substrate facing the liquid drop accommodation space;
a common electrode layer between the upper substrate and the lower substrate;
an array of first photosensitivity detection circuits between the lower substrate and the second hydrophobic layer;
an array of second photosensitivity detection circuits between the lower substrate and the second hydrophobic layer;
and
an array of driving circuits between the lower substrate and the second hydrophobic layer;
wherein each of the first photosensitivity detection circuits and second photosensitivity detection circuits includes a photosensitive transistor and a first gating transistor;
wherein a gate electrode of the photosensitive transistor is coupled to a first scan signal line, a source electrode of the photosensitive transistor is coupled to a first power supply voltage signal line, and a drain electrode of the photosensitive transistor is coupled to a source electrode of the first gating transistor;
wherein a gate electrode of the first gating transistor is coupled to a second scan signal line, and a drain electrode of the first gating transistor is coupled to a read signal line;
wherein each driving circuit includes a driving transistor and a driving electrode;
a gate electrode of the driving transistor is coupled to a third scan signal line, a source electrode of the driving transistor is coupled to a data signal line, and a drain electrode of the driving transistor is coupled to the driving electrode;
and
wherein the photosensitive transistor of each of the first photosensitivity detection circuits is configured to perform optical detection;
and the photosensitive transistor of each of the second photosensitivity detection circuits is configured to be used as a comparison transistor.

15 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/971,543Filed 4 May 2018
Priority: CN 201710891272.927 Sep 2017
Published: 28 Mar 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification23 codes

H10F 30/2863
The devices having PN homojunction gates: field-effect phototransistors having PN homojunction gates
B01L 3/5027
With fluid transport, e.g. in multi-compartment structures: by integrated microfluidic structures, i.e. dimensions of channels and chambers are…
B01L 3/502715
By integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g.…
B01L 3/502792
Specially adapted for droplet or plug flow, e.g. digital microfluidics: for moving individual droplets on a plate, e.g. by locally altering…