摘要 :
We report a high performance foldable and rollable AMOLED display with 300 ppi (real RGB) driven by oxide thin film transistors (TFTs) based on a polyimide (PI) substrate. No new defects appear on the display after 100,000 times b...
展开
We report a high performance foldable and rollable AMOLED display with 300 ppi (real RGB) driven by oxide thin film transistors (TFTs) based on a polyimide (PI) substrate. No new defects appear on the display after 100,000 times bending with radius of curvature at 3 mm. In the oxide TFT, the Lanthanide rare earth doped In-Zn-O (LnIZO) is employed as the key active layer to improve the mobility and stability. The fabricated Ln-IZO TFT with BCE process exhibits a high field-effect mobility of ～40 cm~2 V~(-1) s~(-1), a subthreshold swing of 0.13 V/decade, and an I_(on)/I_(off) ratio of 10~9. Meanwhile, laminated Al_2O_3/MgO film prepared by the method of atomic layer deposition (ALD) is used as the encapsulation of AMOLED display.
收起
摘要 :
In this paper, the electrical stability of organic thin-film transistors (OTFTs) were investigated. Solution and photolithography technologies were used for organic thin film formation and patterning. All stacks were constructed w...
展开
In this paper, the electrical stability of organic thin-film transistors (OTFTs) were investigated. Solution and photolithography technologies were used for organic thin film formation and patterning. All stacks were constructed with organic materials. However, the polymer-type organic semiconductor material was used for active layer. Also, all process temperatures taken place below 120℃. In addition, the OTFTs exhibit a good process uniformity and high stability. Furthermore, the OTFTs integrated with 6-inch active matrix organic light emitting diodes (AMOLEDs) was realized.
收起
摘要 :
A new transparent display system with human-computer interaction (HCI) will become the key technology of next generation display. We have developed an interactive transparent display system with 17" transparent AMOLED. The transmi...
展开
A new transparent display system with human-computer interaction (HCI) will become the key technology of next generation display. We have developed an interactive transparent display system with 17" transparent AMOLED. The transmittance of the transparent AMOLED can achieve 70.6% and the brightness is higher than 483 cd/m~2. Furthermore, the interactive transparent AMOLED system has successfully verified in intelligent aquarium and ecological box with realtime interactive operation.
收起
摘要 :
We present a QQVGA top emitting monochrome AMOLED display with 85dpi resolution using an organic TFT backplane on low temperature PEN-foil. The backplane process flow is based on a 7 layer photolithography process that yields a fi...
展开
We present a QQVGA top emitting monochrome AMOLED display with 85dpi resolution using an organic TFT backplane on low temperature PEN-foil. The backplane process flow is based on a 7 layer photolithography process that yields a final mobility of the OTFT of ～0.4 cm~2/Vs. The aperture ratio of the top-emitting OLEDs is over 75%. For operation at 10 V supply voltage (V_(DD)), the brightness of the display using red and green OLEDs exceeds 200 cd/m~2.
收起
摘要 :
New PMOS LTPS (low temperature polycrystalline silicon)-thin film transistor (TFT) pixel circuit, which can suppress an OLED current error caused by the hysteresis of LTPS-TFT for active matrix organic light emitting diode (AMOLED...
展开
New PMOS LTPS (low temperature polycrystalline silicon)-thin film transistor (TFT) pixel circuit, which can suppress an OLED current error caused by the hysteresis of LTPS-TFT for active matrix organic light emitting diode (AMOLED) display, is proposed and fabricated. The proposed pixel circuit employs a reset voltage driving so that the sweep direction of gate voltage in the current driving TFT is not altered by the gate voltage in the previous frame. Our experimental results show that OLED current error of the proposed pixel is successfully suppressed because a reset voltage can enable the starting gate voltage for a desired one not to be varied, while that of the conventional 2-TFT pixel exceeds over 15% due to the hysteresis of LTPS-TFT.
收起
摘要 :
A new robust display with smart stack-up structure was suggested and improved the pen drop height from 2 cm to 9.5 cm without any electrostatic damage due to the friction between top film and bottom film during cyclic rolling. The...
展开
A new robust display with smart stack-up structure was suggested and improved the pen drop height from 2 cm to 9.5 cm without any electrostatic damage due to the friction between top film and bottom film during cyclic rolling. The unique rolling strain distribution was analyzed and validated by experimental results.
收起
摘要 :
The active-matrix organic light-emitting diode (AMOLED) is an energy efficient display technology due to its nonvolatility. However, the complex circuit structure obstructs its performance improvement. Here, ferroelectric field ef...
展开
The active-matrix organic light-emitting diode (AMOLED) is an energy efficient display technology due to its nonvolatility. However, the complex circuit structure obstructs its performance improvement. Here, ferroelectric field effect transistors (FeFETs) consisting of a BiFeO3 (BFO) ferroelectric gate layer, a ZnO semiconductor channel layer, and a La0.6Sr0.4MnO3 bottom-gate electrode were fabricated. A large OFF/ON resistance ratio (similar to 4 x 10(3)) was obtained, and the carrier accumulation or depletion at the ZnO/BFO interface owing to the ferroelectric field effect was confirmed by Hall measurements. Based on the high performance ZnO-based FeFET, a simplified AMOLED pixel circuit was designed and experimentally verified. The estimated aperture ratio was improved greatly from 28% to 37%. Furthermore, the operation speed of the FeFET could be as fast as 5 ns. These findings are of great significance in developing high performance AMOLED display devices.
收起
摘要 :
The flexible AMOLED technology allows us to create new applications because of its unique bendable and foldable properties. With the concept of placing the most fragile layers closed to the neutral plane of the devices, we are abl...
展开
The flexible AMOLED technology allows us to create new applications because of its unique bendable and foldable properties. With the concept of placing the most fragile layers closed to the neutral plane of the devices, we are able to increase the reliability of flexible displays. Various applications will be introduced including a smart watch with fully circular design, a bendable display with novel interactive interface and a 7.8" foldable display for phone-tablet 2-in-1 application.
收起
摘要 :
A luminance degradation of AMOLED display is analyzed in order to figure out driving factors for high performance of reliability on a large-scaled display. The initial non-uniformity and ageing parameters were incorporated into th...
展开
A luminance degradation of AMOLED display is analyzed in order to figure out driving factors for high performance of reliability on a large-scaled display. The initial non-uniformity and ageing parameters were incorporated into the luminance decay model. For each set of parameters, we simulated the luminance degradation of 10,000 panels for 100,000 operating hours and analyzed by two criteria; contrast deviation and luminance variation of panels to determine failures. Stability of TFTs is the most significant parameter for realizing highly reliable AMOLED display. Stability of OLEDs is also potential factor when which of TFTs is sufficient.
收起
摘要 :
We presented a Stable IZO based MOTFT with mobility, on/off current ratio, and threshold voltage were 23.5 cm~2/Vs, 10~9, and ～0 V, respectively. After 127 hours gate bias stress, the threshold voltage shift was less than 0.2 V. ...
展开
We presented a Stable IZO based MOTFT with mobility, on/off current ratio, and threshold voltage were 23.5 cm~2/Vs, 10~9, and ～0 V, respectively. After 127 hours gate bias stress, the threshold voltage shift was less than 0.2 V. A 4.8-inch full-color AMOLED demo driven by this MOTFT was demonstrated.
收起
原文获取