tft lcd source driver ic in stock

Similarly, Tft LCD drivers provide smooth and easy to maintain components with a higher charging voltage. In other words, Tft LCD driver provide an easy-to-use option and consume quite some energy on the components, while Tft lcd driver offer a more convenient option and consume less energy to maintain.

Similarly, Tft lCD drivers are much larger in the compared of Tft LCD ones and more important are the differences between Tft LCD and Tft LCD drivers. However, the biggest difference in their functions include that, it can be more into the sizes of Tft LCD drivers.

There are other types of Tft lCD driver, such as amber tft stick driver, battery tft lcd driver, and strip sticks for battery tft drivers. In this type, the sticks are free of the battery and can be used into many other if as is the case. Moreover, the tft lcd driver vary in its aspects as it is powered and can be used with many others.

There are two types of Tft lCD driver for 12v and one such is the Tft LCD driver 12v. In this case, the Tft LCD driver for 12v is also called the Tft LCD driver from 12v to 24v. It is essential to know that a tft lCD driver is 12v or 24v. and in this case, a tft lcd driver with 12v power supply can be obtained.

HSMD-C191 : Agilent HSMD-C191 Low Profile Chipled. This series of ChipLEDs is designed with the smallest footprint to achieve high density of components on board. The HSMx-C191 has the industry standard 0.8 mm footprint. Its low 0.6 mm profile and wide viewing angle make this LED exceptional for backlighting applications. The available colors in this surface mount series are HER, orange, yellow, green,.

SEL1x10x : Uni-Color LED Lamp. Absolute maximum ratings (Ta=25�C) Symbol IF IFP VR Top Tstg Unit mA mA/�C V �C Rating to +100 Condition Above f=1kHz, tw100�s Electrical Optical characteristics (Ta=25�C) Part Number Forward voltage Reverse current Intensity Peak wavelength Spectrum half width VF Condition IR Condition IV Condition P Condition Chip material (V) IF (�A) VR (mcd) IF (nm).

SHE124PGH : High Brightness Led Lamp. Green Colored lens type 5mm(T-13/4) all plastic mold type Viewing angles : 40� Super luminosity Application Traffic Signal Massage Board Variable message signs(VMS) Power Dissipation Forward Current * Peak Forward Current Reverse Voltage Operating Temperature Storage Temperature 260 for 5 seconds * Soldering Temperature Tsol *1.Duty ratio = 1/16, Pulse.

HT16L21 : RAM Mapping 32×4 LCD Driver The HT16L21 device is a memory mapping and multi-function LCD controller/driver. The display segments of the device are 128 patterns (32 segments and 4 commons) display. It can also support LED drive outputs on certain Segment pins. The software configuration feature of the HT16L21 device makes it suitable for multiple LCD applications.

PT-121-B-C11-EPA : LED Lighting Modules Blue 462nm 540lm @ 30A. » » » LEDs - Engines/Modules: Packaged Functional Assemblies - Blue LEDs - Engines/Modules: Packaged Functional Assemblies - Blue LED Engines and LED Modules represent products that consist of integrated LED solutions. At present, there is no consistently used application definition used.

OPB900W55Z : Photointerruptors Slotted Opt Switch. s: Manufacturer: Optek ; Product Category: Photointerruptors ; RoHS: Details ; Sensing Method: Transmissive ; Maximum Reverse Voltage (Emitter): 2 V ; Slot Width: 9.5 mm ; Aperture Width: 1.27 mm ; Output Device: Photologic, Totem Pole ; Power Dissipation: 300 mW ; Maximum Fall Time: 70 ns ; Maximum Operating.

LCM-480234GF-40CG : Display Modules - LCD, OLED, Graphic *; LCD TFT 4.0" MODULE W/NTSC DEC. s: Display Type: TFT - Color LCD ; Display Mode: * ; Backlight: CCFL - White ; Dot Size: - ; Viewing Area: 82.11mm L x 61.77mm W ; Dot Pixels: 480 x 234 ; Dot Pitch: - ; Interface: -.

Features n Output: 384 output channels n 8-bit resolution /256 gray scales n Dot inversion with polarity control ~ V10 for adjusting Gamma correction n Power for analog circuit: 10V n Output dynamic range: AVDD-0.1 n Power consumption of analog circuit: 6mA n Operating frequency: 45MHz(Vcc:2.5V~3.0V) n Output deviation: �2mv n Data inversion for reducing EMI n Cascade function with bi-direction shift control n CMOS silicon gate ( p-type substrate ) n TCP package

General Description The is a data driver IC for a color TFT LCD panel, XGA and SXGA applications. It receives 8 bit per-pixel digital display data,and generates output voltage for 256 grayscales ,enabling a maximum of 16.77M display colors. For better performance, dot inversion and a wide range voltage output, 10V, are designed in this chip, and for reducing EMI, data inversion control is used. This chip supplies 10 sections of voltage -reference for Gamma correction.

Selects left or right shift; DIO1=OUT1,2,3,4,5,6��OUT7,8,9,10,11,12��-- OUT379,380,381,382,383,384��DIO2 SHL DIO1 DIO2 SHIFT 1 Input Output Right 0 Output Input Left I/O Start pulse signal input/output When SHL is applied high (SHL="1"), a start high-pulse DIO1 is latched at the rising edge of the CLK. Then the data are latched serially onto internal latches at the rising edge of the CLK. After all line latches are filled with data, 64 clocks , a pulse is shifted out through the DIO2 pin at the rising edge of the CLK. This function can cascade two or more devices for dot expansion. In normal applications, the DIO2 signal of the first device is connected to the DIO1 of the second stage, the DIO2 of the second one is connected to the DIO1 of the third, and so on, like a daisy chain. In contrast, when SHL is applied low, a start pulse inputs on DIO2, and a pulse outputs through DIO1. *Remark : The input pulse-width of DIO1/2 may exceed 1 clock-cycle. I Latches the polarity of outputs and switches the new data to outputs. 1.At the rising edge, the pin latches the "POL" signal to control the polarity of the outputs. 2.This pin also controls the switch of the line registers that switches the new incoming data to outputs. *Remark: The LD may switch the new data to outputs at anytime even if the line data are not completely full. I Clock input; latching data onto the line latches at the rising edge. After a start pulse input, display data latching is halted automatically after 64 clock cycles. *Remark: At least one CLK cycle is necessary during the high -level period of LD. I Polarity selector for the dot-inversion control. Available at the rising edge of LD. "POL" value is latched at the rising edge of "LD" to control the polarity of the even or odd outputs. "POL=1" indicates that even outputs are of positive polarity with a voltage range from V1~V5, and odd outputs are of negative polarity with a voltage range from V10. On the other hand, if LD receives low level "POL", even outputs are of negative polarity and odd outputs are of positive polarity. POL=1: Even outputs range from ~ V5 Odd outputs range from V10 POL=0: Even outputs range from ~ V10 Odd outputs range from ~ V5 Power supply for analog circuit; Ground pin for analog circuit Power supply for digital circuit Ground pin for digital circuit

Recognized as the world"s leading solution provider for a full array of Display Driver ICs for LCD displays, Novatek has successfully become the industry leader by achieving substantial growth of its revenue and unit shipment, as well as design wins with its world-class customers since its announcement of Taiwan"s first 240ch gate driver and 288/240ch source driver for TFT LCD back in October 1999.

Since then, Novatek has concentrated its R&D resources on delivering the total solution of Display Driver IC, targeting for higher performance, lower EMI, low power consumption and highly integration. With Novatek"s design-wins with the world"s leading panel manufacturers, and affiliated with its strength of chip design, advanced fabrication capacity and process technologies, Novatek has been able to continually deliver the best value added solutions at the best time to market, thereby gaining the satisfaction and royalty from the customers.

Winstar Display will have annual stocktaking from December 26 thru 28, 2018 for the Taiwan and China plants. Please note that all the shipping arrangement during this period will be forbidden. Our ERP system will be closed for stocktaking from December 25 thru 28, 2018. The New Year Holiday is from December 29 thru January 2, 2019; we will return to work on January 2, 2019. Please notice the shipping date before and after holiday and our annual stocktaking.

We are sorry to inform customers this emergent notice that Chunghwa Picture Tubes Ltd. (CPT) on Friday Dec. 14, 2018 announced the sudden suspension of production at two factories without prior notice. CPT has financial stress causes sudden shutdown of factories in Taoyuan, Taiwan and discontinue manufacture in production, Winstar Co. forced to make this TFT Panel EOL notice, we are sorry but this is not what we can expected in advance. We will try our best to provide alternative plan and schedule as soon as possible. Also, Winstar will do our best to buy CPT TFT panel already stock in the market.

Remark: Since CPT already discontinued business, we cannot guarantee your last order quantity will be fulfilled. We will do our best to buy CPT TFT panel stock in the market. But your order will be proceeded at the first priority.

This is an issue to almost module manufacturers who use CPT TFT panel not only to Winstar Display. We need our customers’ understanding and cooperation to the above captioned issue. Thank you in advance. If there have further questions, please feel free to contact our sales persons or via sales@winstar.com.tw . Thank you.

WF70A2SIAGDNT0 is a 7 inch High Brightness TFT LCD module with Resistive Touch Panel (RTP), resolution WVGA 800x480 pixels. This TFT model is built in with ST-5623 source driver IC and ST-5091 gate driver IC with high brightness 600 nits (typical value). WF70A2 model supports RGB interface.

The supply voltage for logic (VCC) of WF70A2SIAGDNT0 is from 3.0V to 3.6V, typical value 3.3V, Anti-Glare surface panel, View Direction 12 o"clock, Gray scale inversion 6 o"clock, and aspect ratio 16:9, contrast ratio 800 (typical value). It can be operating at temperatures from -20℃ to +70 ℃ and storage temperatures from -30 to +80 ℃.

WF70A2SIAGDNG0 is a High Brightness TFT LCD module with Projected Capacitive Touch Panel (PCAP), resolution WVGA 800x480 pixels, diagonal size 7 inch. This TFT model is built in with ST-5623 source driver IC and ST-5091 gate driver IC with high brightness 700 nits (typical value). WF70A2 TFT model supports RGB interface, the PCAP touch screen IC is FT5426 which supports I2C interface.

The supply voltage for logic (VCC) of WF70A2SIAGDNG0 is from 3.0V to 3.6V, typical value 3.3V, Glare surface panel, View Direction 12 o"clock, Gray scale inversion 6 o"clock, and aspect ratio 16:9, contrast ratio 800 (typical value). It can be operating at temperatures from -20℃ to +70 ℃ and storage temperatures from -30 to +80 ℃. This WF70A2SIAGDNG0 is very suitable for outdoor applications, for example, outdoor measuring equipment, and GPS Navigation system.

Winstar Bar Type TFT is a new rising star for many applications, These Bar TFT displays are a perfect choice to apply in: 1U/2U server, audio system and advertising display, automotive, aviation, marine systems, security equipment, Industrial equipment, outdoor intercom systems and control panels, medical equipment. Here is the Quick Selection Guide for Winstar released 5.2” WF52A and application examples for your reference.

This application claims the priority of Korean Patent Application No. 10-2004-0005645, filed on Jan. 29, 2004, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein in its entirety by reference.

The present invention relates to a signal driver of a liquid crystal display, and more particularly, to a TFT-LCD source driver employing a frame cancellation method and a TFT-LCD source line driving method.

A liquid crystal display controls the light transmissivity of a liquid crystal using an electric field to display images. The liquid crystal display includes a liquid crystal display panel (TFT-LCD) in which liquid crystal cells are arranged in a matrix form and a driving circuit for driving the TFT-LCD.

FIG. 1 shows a conventional liquid crystal display. Referring to FIG. 1, a TFT-LCD 30 is constructed such that unit pixels are arranged in a matrix form. Each pixel includes a liquid crystal capacitor Cs and a switching thin film transistor TR. A gate of the thin film transistor TR is connected to a gate line 50 driven by a gate driver 10. A source of the thin film transistor TR is connected to a source line 55 driven by a source driver 20. When the thin film transistor TR, connected to the gate line 50, is turned on by an output voltage of the gate driver 10, a gray scale voltage output from the source driver 20 is applied to the liquid crystal capacitor Cs that is connected to the turned-on thin film transistor TR.

FIG. 2 shows a configuration of a conventional source driver 20. The digital R, G, B data 31, input to the source driver 20, is sampled in response to a latch enable signal output from a shift register 21 and latched in a latch 22. A data latch 23 receives and latches the sampled digital R, G, B data 31 in response to a clock signal CLK1. A D/A converter 24 decodes the digital R, G, B data 31 latched in the data latch 23 and converts the digital R, G, B data 31 to analog R, G, B signals in response to a gamma reference voltage VGMA that represents a brightness. An output buffer 25 amplifies the analog R, G, B signals and outputs them to a corresponding channel among a plurality of channels Y1, Y2, Y3, . . . , YM-2, YM-1, and YM. The channels Y1, Y2, Y3, . . . , YM-2, YM-1, and YM are connected to source lines 55 of the TFT-LCD 30 (shown in FIG. 1).

In the aforementioned configuration of the source driver 20, the channels Y1, Y2, Y3, . . . YM-2, YM-1, and YM require respective latches 22, data latches 23, D/A converters 24 and output buffers 25, in order to provide respective gray scale voltages to TFT-LCD 30. The D/A converters 24 and the output buffers 25 play an important role in deciding a chip size of the source driver 20 because they occupy a large area in the source driver 20.

For example, as the resolution of the TFT-LCD 30 increases, the number of input bits of digital R, G, B data 31 increases. Here, the size of the D/A converter 24 that decodes the digital R, G. B data 31 increases in proportion to 2 (number of bits). This increases the chip size of the source driver 20 and the number of source lines required by the TFT-LCD 30. This increase affects the power consumption of the source driver 20 and results in a deterioration of characteristics of the source driver 20.

Output voltage deviation among the channels Y1, Y2, Y3, . . . , YM-2, YM-1, and YM generates stripes on the TFT-LCD 30, which deteriorates picture quality. The output voltage deviation among the channels Y1, Y2, Y3, . . . YM-2, YM-1, and YM can increase when the intermediate value between the two gray scale voltages GA and GC is output and there are mismatches between the output and the input devices. For example, mismatching of transistors 301, 302, 303 and 304, which can happen during a fabrication process, can bring about such defects in a liquid crystal display. Accordingly, the output buffer 25 can eliminate output voltage deviation among the channels Y1, Y2, Y3, . . . YM-2, YM-1, and YM only when characteristics of internal transistors 301, 302, 303 and 304 are accurately matched.

Therefore, a TFT-LCD source driver 20 that is not significantly affected by mismatching of the internal transistors of the output buffer 25 and has a reduced chip area is needed.

An exemplary embodiment of the present invention provides a TFT-LCD source driver that consecutively outputs specific frames using a frame cancellation method. Another exemplary embodiment of the present invention provides a TFT-LCD source line driving method using the TFT-LCD source driver.

In another exemplary embodiment of the present invention, there is provided a TFT-LCD source driver that outputs source line driving voltages to every two channels among a plurality of channels, the TFT-LCD source driver comprising a positive half decoder that generates positive first and second gray scale voltages. A negative half decoder that generates negative first and second gray scale voltages, is provided as well. There is a first chopping multiplexer that selectively transmits the positive first and second gray scale voltages, output from the positive half decoder, to a first output buffer in response to a chopping control signal, wherein the first output buffer amplifies the output signal of the first chopping multiplexer. There is also a second chopping multiplexer that selectively transmits the negative first and second gray scale voltages, output from the negative half decoder, to a second output buffer in response to the chopping control signal, wherein the second output buffer amplifies the output signal of the second chopping multiplexer. The TFT-LCD source driver further comprises the first and second output buffers amplifying the output signal of the respective first and second chopping multiplexer. There is also a first polarity multiplexer that selects one of output signals of the first and second output buffers and outputs it as a driving voltage of a first channel in response to a polarity control signal. There is also a second polarity multiplexer that selects one of output signals of the first and second output buffers and outputs it as a driving voltage of a second channel in response to the polarity control signal.

In another exemplary embodiment of the present invention, there is provided a TFT-LCD source line driving method comprising generating both a positive first and second gray scale voltages, as well as, a negative first and second gray scale voltages. Selectively transmitting both the positive first and second gray scale voltages to a first output buffer in response to a chopping control signal, as well as, the negative first and second gray scale voltages to a second output buffer in response to the chopping control signal. The method further comprises amplifying a corresponding gray scale voltage transmitted to the first and second output buffers. Selecting one of the output signals of the first and second output buffers and outputting it to a first channel in response to a polarity control signal. Selecting one of the output signals of the first and second output buffers and outputting it to a second channel in response to the polarity control signal. In an exemplary embodiment of the present invention the gray scale voltages output to the first and second channels are alternately applied to source lines of a TFT-LCD panel. The first and second gray scales have a difference of 2 gray levels. The first and second gray scale voltages are output to the first and second channels for every four frames. An exemplary embodiment of the present invention repeatedly outputs driving voltages having a difference of a 2 gray levels to two channels for a predetermined number of frames using a frame cancellation method that utilizes an optical illusion by which it is seen as if an intermediate gray scale voltage between the driving voltages is output. Accordingly, it is possible to prevent stripes from being generated on a TFT-LCD panel due to averaging of two gray scale voltages and mismatching of internal transistors of an output buffer in the conventional TFT-LCD source driver.

The above and other exemplary features of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which:

An exemplary embodiment of the present invention repeatedly outputs two gray scale voltages for a predetermined number of frames using a frame cancellation method that utilizes an optical illusion, without averaging the two, such that it is seen as if an intermediate gray scale voltage between the two gray scale voltages is output. FIG. 4 shows a TFT-LCD source driver according to an exemplary embodiment of the present invention. The depicted exemplary source driver includes a positive half decoder 411, a negative half decoder 412, first and second chopping multiplexers 421 and 422, first and second output buffers 431 and 432, and first and second polarity multiplexers 441 and 442.

For convenience an exemplary embodiment of the present invention in which four frames are repeatedly output to obtain a frame cancellation effect is described herein. However, the number of frames does not have to be limited to four, and one of ordinary skill in the art will be able to modify the embodiments described herein to accomplish this. Furthermore, in an other exemplary embodiment of the present invention, source line driving voltages can be output to two adjacent channels Y1 and Y2 for each frame.

The positive half decoder 411 and the negative half decoder 412 are shared by the adjacent channels Y1 and Y2. The positive half decoder 411 decodes a gray scale voltage with a positive polarity, and the negative half decoder 412 decodes a gray scale voltage with a negative polarity. Since the two adjacent channels Y1 and Y2 share the positive and negative half decoders, the area of the source driver is reduced by half, compared to a case where each channel includes the positive and negative decoders. In this exemplary embodiment, the positive polarity voltage can be a voltage input from a source driver to the TFT-LCD 30 (shown in FIG. 1) that is higher than a common voltage Vc (shown in FIG. 1). Conversely, the negative polarity voltage can be a voltage input from a source driver to the TFT-LCD 30 (shown in FIG. 1) that is lower than the common voltage Vc (shown in FIG. 1).

Referring to FIGS. 5A and 5B, an exemplary configuration of the first and second chopping multiplexers of FIG. 4 are depicted. The first chopping multiplexer 421, depicted in FIG. 5A, selectively transmits output voltages of the positive half decoder 411 to the first output buffer 431 in response to chopping control signals CHOP and /CHOP. For example, the first chopping multiplexer 421 transmits first and second gray scale voltages PDEC.O1 and PDEC.O2 of the positive half decoder 411 to the first output buffer 431 through first and second PMOS transistors 501 and 502, in response to an inverted chopping control signal /CHOP and a chopping control signal CHOP, respectively.

Similarly, the second chopping multiplexer 422, depicted in FIG. 5B, transmits first and second gray scale voltages NDEC.O1 and NDEC.O2 of the negative half decoder 412 to the second output buffer 432 through first and second NMOS transistors 503 and 504, in response to the inverted chopping control signal /CHOP and the chopping control signal CHOP, respectively.

FIG. 6 depicts an exemplary embodiment of a chopping control signal generator in accordance with the present invention. The chopping control signals CHOP and /CHOP, depicted in FIGS. 5A and 5B, can be generated by a chopping control signal generator 600. The chopping signal generator 600 includes first and second D flip-flops 601 and 602. The first D flip-flop 601 outputs a polarity control signal POL in synchronization with the rising edge of a clock signal CLK1. The second D flip-flop 602 inverts the output signal of the first D flip-flop 601 and outputs the chopping control signal CHOP, in synchronization with the output signal of the first D flip-flop 601. Accordingly, the chopping control signal CHOP is synchronized with the rising edge of the clock signal CLK1 and corresponds to a signal having a period twice the period of the polarity control signal POL, that is, a signal with a frequency half the frequency of the polarity control signal POL.

Referring back to the exemplary embodiment depicted in FIG. 4, a positive input port (+) of the first output buffer 431 receives the output signal of the first chopping multiplexer 421. A negative input port (−) of the first output buffer is connected to an output port of the buffer 431, such that the output signal of the first chopping multiplexer 421 is output through the output port of the first output buffer 431. A negative input port (−) of the second output buffer 432 receives the output signal of the second chopping multiplexer 422. A positive input port (+) of the second output buffer 432 is connected to an output port of buffer 432, such that the output signal of the second chopping multiplexer 422 is output through the output port of the second output buffer 432. The first and second output buffers 431 and 432 are configured as a general voltage follower. The voltage follower is well known in the art so a detailed explanation thereof is omitted here.

The first and second polarity multiplexers 441 and 442 selectively transmit the output signals of the first and second output buffers 431 and 432, input to their positive input ports (+) and negative input ports (−), to the first and second channels Y1 and Y2, in response to the polarity control signal POL. The output of the first output buffer 431 is input into the positive input port (+) of polarity multiplexer 441 and the negative input port (−) of polarity multiplexer 442. The output of the second output buffer 432 is input into the positive input port (+) of polarity multiplexer 442 and the negative input of the polarity multiplexer 441. When the polarity control signal POL is at a logic high level, the first and second polarity multiplexers 441 and 442 output the signals input to their positive input ports (+). When the polarity control signal is at a logic low level, the first and second polarity multiplexers 441 and 442 output the signals input to their negative input ports (−).

The operation of an exemplary TFT-LCD source driver, in accordance with the present invention is discussed below. The operation of the source driver in response to the polarity control signal POL, the chopping control signal CHOP, and gray scale levels provided as the outputs O1 and O2 of the positive and negative half decoders 411 and 412, is represented in Table 1 below.

Referring to Table 1, in the first frame, a driving voltage with a gray level 0 is output to the first channel Y1 and a driving voltage with a gray level −2 is output to the second channel Y2 in response to the polarity control signal POL at a logic high level and the chopping control signal at a logic high level. In the second frame, a driving voltage with a gray level −2 is output to the first channel Y1 and a driving voltage with a gray level 0 is output to the second channel Y2 in response to the polarity control signal POL at a logic low level and the chopping control signal at a logic high level. In the third frame, a driving voltage with a gray level 2 is output to the first channel Y1 and a driving voltage with a gray level −0 is output to the second channel Y2 in response to the polarity control signal POL at a logic high level and the chopping control signal at a logic low level. In the fourth frame, a driving voltage with a gray level −0 is output to the first channel Y1 and a driving voltage with a gray level 2 is output to the second channel Y2 in response to the polarity control signal POL at a logic low level and the chopping control signal at a logic low level.

As described above, for the four frames, the driving voltages with gray levels 0 and 2 and the driving voltages with gray levels −0 and −2 are repeatedly output to the first and second channels Y1 and Y2. Accordingly, it is seen as if the first and second channels Y1 and Y2 alternately output a gray level 1 and a gray level −1 for four frames. The operation of an exemplary TFT-LCD source driver in response to logic levels of the polarity control signal POL and the chopping control signal CHOP is represented in Table 2 below.

It should also be understood that the above description is only representative of illustrative embodiments. Other applications and embodiments can be straightforwardly implemented without departing from the spirit and scope of the present invention. It is therefore intended, that the invention not be limited to the specifically described embodiments, but the invention is to be defined in accordance with that claims that follow.