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323results about How to "Increase opening ratio" patented technology

Pixel drive circuit of OLED (Organic Light Emitting Diode) display and drive method thereof

InactiveCN101976545AProblems Compensating for Brightness Non-UniformityIncrease opening ratioStatic indicating devicesCapacitanceHemt circuits
The invention discloses a pixel drive circuit of an OLED (Organic Light Emitting Diode) display and a drive method thereof. The pixel circuit comprises a drive transistor, two switching transistors, a coupling capacitor, a storage capacitor and an OLED, wherein the drain electrode of the first switching transistor is connected with a data line, the grid electrode is connected with a first scanning control line, and the source electrode is connected with the end B of the coupling capacitor; the drain electrode of the second switching transistor is connected with the storage capacitor and the end A of the coupling capacitor, the grid electrode is connected with a second scanning control line, and the source electrode is connected with the drain electrode of the drive transistor and is connected with a power line through the OLED; and the grid electrode of the drive transistor is connected with the storage capacitor and the end A of the coupling capacitor, and the source electrode is grounded. The circuit can be used for effectively compensating the heterogeneity of threshold voltage of a thin film transistor and the degeneration of the cut-in voltage of the OLED to improve the picture brightness homogeneity of the OLED display screen.
Owner:SOUTH CHINA UNIV OF TECH

Composite porous membrane and process for producing the same

[Problems]To provide a membrane material that realizes effective and efficient separation of a target substance of micron size, being easy to handle and that can be worked into various forms; a blood filtration membrane and a leukocyte removing filter unit that realizes a substantial reduction of filter material volume while retaining high capability of removing leukocytes, thereby reducing the loss of hemocyte suspension; and a cell culturing diaphragm suitable for co-culturing and a relevant method of cell culturing. [Means for Solving Problems]There is provided a composite porous membrane comprising a porous membrane comprised of an organic polymeric compound, and a supporting porous membrane adjacent to the porous membrane, characterized in that the organic polymeric compound constituting the porous membrane penetrates in at least part of a surface adjacent to porous membrane of the supporting porous membrane, the porous membrane having specified opening ratio, average pore diameter, standard deviation of pore diameter, ratio of through pore, average membrane thickness, standard deviation of membrane thickness and internal structure, and that the supporting porous membrane has communicating pores of 0.5D μm or greater average pore diameter. Further, there are provided a blood filtration membrane comprising the composite porous membrane; a leukocyte removing filter unit comprising the composite porous membrane as a second filter; and, utilizing the composite porous membrane, a cell culturing diaphragm and method of cell culturing.
Owner:ASAHI KASEI MEDICAL CO LTD

Array substrate, preparation method of array substrate and organic light-emitting diode display device

The invention provides an array substrate, a preparation method of the array substrate and an organic light-emitting diode display device and belongs to the technical field of organic light-emitting diode display. The problems that a prior organic light-emitting diode display device is complex in preparation process and high in cost are solved. The array substrate comprises a plurality of pixel units located on the substrate, wherein each of the pixel units comprises a thin film transistor drive layer and an organic light-emitting diode which is driven by the thin film transistor drive layer and is farer than the thin film transistor drive layer, in a the direction far away from the substrate, the organic light-emitting diode comprises a transparent first electrode, a luminous layer, a second electrode, a reflection layer located between the thin film transistor drive layer and the organic light-emitting diode and a colorful film which is located between the reflection layer and the organic light-emitting diode, the second electrode is a transflective layer, or the second electrode is transparent and the transflective layer is arranged on the second electrode, and the transflective layer and the reflection layer form a micro-cavity structure. The array substrate is particularly suitable to a white organic light-emitting diode display device.
Owner:BOE TECH GRP CO LTD

Pixel circuit and driving method, organic light-emitting diode (OLED) display panel and device thereof

The invention provides a pixel circuit and a driving method, an organic light-emitting diode (OLED) display panel and a device thereof. The pixel circuit comprises a plurality of rows of pixel units. Each row of pixel units comprises a plurality of sub pixel units and further comprises an auxiliary compensation circuit. Each auxiliary compensation circuit generates a switch control signal input into a sub pixel driving circuit included by the corresponding sub pixel units according to a scanning signal from a gate drive circuit and generates a compensation control signal input to the sub pixel driving circuit according to a control signal from the gate drive circuit, and the sub pixel driving circuit receives data voltage from a data line according to the switch control signal, controls the OLED to emit light according to the data voltage through a driving transistor included by the sub pixel driving circuit, and controls and compensates threshold voltage of the driving transistor according to the compensation control signal when the driving transistor drives the OLED to emit light. By means of the pixel circuit, the driving method, the OLED display panel and the device, the pixel circuit design is simplified, the pixel opening rate is increased, the service life of the OLED panel is prolonged, and the cost is reduced.
Owner:BOE TECH GRP CO LTD

TFT-LCD (thin film transistor liquid crystal display) array substrate and driving method thereof

The invention relates to a TFT-LCD (thin film transistor liquid crystal display) array substrate and a driving method thereof. The array substrate comprises a substrate, wherein pixel regions which are arranged in a matrix mode are formed on the substrate; a first pixel electrode, a first thin-film transistor, a second pixel electrode and a second thin-film transistor are formed in each pixel area; the first pixel electrode and the first thin-film transistor are positioned in an odd row; the second pixel electrode and the second thin-film transistor are positioned in an even row; a first gate line and a second gate line are formed in each pixel region; the first gate line is connected with the grid electrode of the first thin-film transistor; the second gate line is connected with the grid electrode of the second thin-film transistor; and a data line is formed in each pixel region and is respectively connected with the source electrode of the first thin-film transistor and the source electrode of the second thin-film transistor. In the invention, the quantity of the data lines and the quantity of data driving chips or the quantity of pipe pins of the data driving chips are reduced, or the quantity of the gate lines and the quantity of scanning driving chips or the quantity of the pipe pins of the scanning driving chips are reduced and the production cost of a TFT-LCD is reduced.
Owner:BEIJING BOE OPTOELECTRONCIS TECH CO LTD

OLED light-emitting device and manufacturing method thereof

The invention relates to an OLED light-emitting device and a manufacturing method of the OLED light-emitting device. The OLED light-emitting device comprises a substrate, a planarization layer and a plurality of light-emitting units, wherein the planarization layer is located on the substrate and provided with a plurality of bending parts which are arranged at intervals; the light-emitting units are located on the planarization layer, and each light-emitting unit is located on the corresponding bending part and has a shape corresponding to that of the bending part. Each light-emitting unit comprises a first electrode, a light-emitting structure located on the first electrode and a second electrode located on the light-emitting structure. A cross section of each bending part has an arc-shaped outline as a whole. According to the OLED light-emitting device and the manufacturing method of the OLED light-emitting device, by arranging the bending parts in the contact positions of the light-emitting units and the planarization layer, the planar planes of the light-emitting units are turned into bending surfaces, the aperture rate of organic light-emitting diodes is substantially increased, light-emitting area is enlarged, and thus the luminance of the OLEDs is improved, power consumption is reduced, and the service life of the product is prolonged.
Owner:EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD

Thin film transistor array substrate, liquid crystal panel and liquid crystal display

The invention discloses a thin film transistor array substrate. The thin film transistor array substrate comprises a first substrate, scanning lines, data lines and a pixel region, wherein the scanning lines and the data lines are located on the first substrate, and intersect to limit the pixel region. The pixel region comprises a thin film transistor and a pixel electrode located above the thin film transistor. A metal light-shielding layer is arranged between the thin film transistor and the pixel electrode, and comprises a first light-shielding region, a second light-shielding region and a third light-shielding region in a mutual isolation mode. The first light-shielding region is located between a source electrode/drain electrode and the pixel electrode, and the pixel electrode is electrically connected to the source electrode/drain electrode through the first light-shielding region. The second light-shielding region is located above an active layer, and the third light-shielding region is located above the scanning lines and the data lines. The invention further discloses a liquid crystal panel. The liquid crystal panel comprises the thin film transistor array substrate. The invention further discloses a liquid crystal display comprising the liquid crystal panel.
Owner:TCL CHINA STAR OPTOELECTRONICS TECH CO LTD

TFT array substrate and manufacturing method thereof

The invention provides a TFT array substrate and a manufacturing method thereof. The TFT array substrate is provided with a transparent conducting thin film electrode plate (503), a second metal electrode plate (202) and a common electrode wire (102), wherein the transparent conducting thin film electrode plate (503), a primary area pixel electrode (501) and a secondary area pixel electrode (502) are positioned on the same layer; the second metal electrode plate (202) is positioned on a second metal layer (M20); the common electrode wire (102) is positioned on a first metal layer (M10); a part of the common electrode wire (102), a part of the second metal electrode plate (202) and a part of the transparent conducting thin film electrode plate (503) are overlapped spatially, and the transparent conducting thin film electrode plate (503) is in contact with a part of the common electrode wire (102) through a second via hole (422) penetrating through an insulation protective layer (40) and a gate insulation layer (20); and a part of the common electrode wire (102), a part of the second metal electrode plate (202) and a part of the transparent conducting thin film electrode plate (503) form a charge sharing capacitor (C10) together, so that the capacity of the charge sharing capacitor can be improved, the aperture opening ratio is increased, and the display quality of a liquid crystal display panel is improved.
Owner:SHENZHEN CHINA STAR OPTOELECTRONICS TECH CO LTD
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