| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 324770000 | Liquid crystal device test | 23 |
| 20080315908 | DIRECT DETECT SENSOR FOR FLAT PANEL DISPLAYS - Each sensor of a linear array of sensors includes, in part, a sensing electrode and an associated feedback circuit. The sensing electrodes are adapted to be brought in proximity to a flat panel having formed thereon a multitude of pixel electrodes in order to capacitively measure the voltage of the pixel electrodes. Each feedback circuit is adapted to actively drive its associated electrode via a feedback signal so as to maintain the voltage of its associated electrode at a substantially fixed bias. Each feedback circuit may include an amplifier having a first input terminal coupled to the sensing electrode and a second input terminal coupled to receive a biasing voltage. The output signal of the amplification circuit is used to generate the feedback signal that actively drives the sensing electrode. The biasing voltage may be the ground potential. | 12-25-2008 |
| 20090002013 | Testing circuit and testing method for liquid crystal display device - This invention discloses a testing circuit and a test method for a liquid crystal display device. The testing circuit for the liquid crystal display device comprises: a substrate, a plurality of pixels, a plurality of signal paths, and numbers of p shorting bars, wherein the plurality of pixels are formed on the substrate, and every pixel has numbers of n sub-pixels; the plurality of signal paths are formed on the substrate and connected to the sub-pixels correspondingly; and the p shorting bars are formed on the substrate and respectively connected to (p×m+1)th, (p×m+2)th, (p×m+3)th . . . , (p×m+p)th numbered signal paths of the plurality of the signal paths, wherein when n is odd, p=2×n; when n is even, p=n; and m being zero or positive integers. The testing method for the liquid crystal display device, by providing the mentioned above testing circuit for the liquid crystal display device, comprising: dividing the p shorting bars into n groups; and applying testing signals respectively to the shorting bars of every group for testing. The testing method for the liquid crystal display device also comprises: dividing the p shorting bars into 2 groups by odd-even sequence; and applying testing signals respectively to the shorting bars of every group for test, so as to effectively increase the testing efficiency of both array and cell test in fabrication of the liquid crystal display device. | 01-01-2009 |
| 20090015288 | Circuit testing apparatus - A circuit testing apparatus for testing a device under test is disclosed. The circuit testing apparatus includes a function generator, a signal measuring module and a determining module. The function generator is coupled to the device under test for providing a plurality of testing signals according to a predetermined manner. The signal measuring module is coupled to the device under test and the function module for measuring a plurality of measuring signals generated by the device under test according to the plurality of testing signals and generating a plurality of measuring results according to the predetermined manner. The determining module is coupled to the signal measuring module for determining a testing result for the device under test according to the plurality of measuring results. | 01-15-2009 |
| 20090072854 | LIQUID CRYSTAL DISPLAY PANEL AND TESTING AND MANUFACTURING METHODS THEREOF - A liquid crystal display (LCD) panel simplifying its testing and manufacturing. The LCD panel includes (formed on a substrate) gate lines, data lines, and pixels including pixel transistors. The LCD panel further includes a plurality test transistors (e.g., data test transistors for driving the odd and even data lines) formed in a package region of a driving IC (integrated circuit) configured to drive the data lines. The plurality of test transistors may be selectively activated (turned ON) during testing before the driving integrated circuit (Driver IC package) is attached (e.g., fixed) to the driving IC package region. The LCD panel may further include a plurality of gate test transistors configured to drive the odd and even gate lines. | 03-19-2009 |
| 20090079464 | ELECTRO-OPTICAL DEVICE AND ELECTRONIC APPARATUS - An electro-optical device includes a peripheral circuit that is provided in a peripheral area, a terminal that is provided in the peripheral area; and an electric wiring pattern that provides an electric connection between the terminal and the peripheral circuit, the electric wiring pattern having a low resistance portion and a high resistance portion, the high resistance portion having a winding layout in a terminal-overlapping area of the peripheral area at which the terminal is formed when viewed in plan. | 03-26-2009 |
| 20090146679 | Method for testing liquid crystal display - An LCD test method and apparatus for reducing the number of channels of a probe unit is provided. An apparatus for testing a liquid crystal display including: a stage on which a liquid crystal panel is placed; a plurality of vertically divided blocks, wherein each of the vertically divided blocks include a plurality of adjacent data lines; a data probe unit that provides test pattern signals respectively to groups of at least two of the plurality of vertically divided blocks of the liquid crystal panel; a plurality of horizontally divided blocks, wherein each of the horizontally divided blocks include a plurality of adjacent gate lines; a gate probe unit that provides scanning signals respectively to the plurality of horizontally divided blocks of the liquid crystal panel; and a controller that provides test pattern signals to the data probe unit and provides scanning signals to the gate probe unit. | 06-11-2009 |
| 20090160478 | TESTING DEVICE FOR PERFORMING A TEST ON A LIQUID CRYSTAL DISPLAY AND A METHOD OF DRIVING THE TESTING DEVICE - A testing device for performing a high-voltage test on a liquid crystal display is provided. The testing device includes a voltage converting unit, an input connector, and a power supplier. The voltage converting unit includes a plurality of resistors between an output terminal and a ground terminal. The input connector includes a terminal connected to one node of the plurality of resistors. The power supplier includes a switching unit to output a ground voltage to the terminal when power is applied from an external power source. | 06-25-2009 |
| 20090167341 | SYSTEM AND METHOD FOR TESTING A LIQUID CRYSTAL PANEL - A method for testing a liquid crystal panel is provided. The method simulates an outside force endured by the liquid crystal panel when the liquid crystal panel is assembled as a finished product, so that unqualified liquid crystal panels can be detected before the finished product is put into use. | 07-02-2009 |
| 20090184730 | System and Method For Display Test - The system for display test includes a driving circuit having integrated circuit (IC) pads on the substrate and the IC pads are electrically connected to the signal lines, respectively. And the first switches are between the first test pads and the IC pads, wherein the number of the first test pads is less than the number of the IC pads. | 07-23-2009 |
| 20090278563 | Testing apparatus for fixing and testing a LCD panel - A testing apparatus for fixing and testing a LCD panel includes a location frame and an adjustable base for fixing a camera set. The location frame and the adjustable base are connected together via a holder set. The adjustable base is able to be adjusted a distance between the location frame on the holder set. The location frame includes a framework set with adjustable plates on the edges of the backside of the framework. The adjustable plates are adjusted according to different sizes of the LCD panels for placing LCD panels with different sizes. The LCD panel is supported by top-supporting devices on the backside of the framework and located at the backside of the framework. Each edge of the framework is set with a movable shade which is adjusted according to different sizes of the LCD panels for shading metal rims of the LCD panel. When the camera set takes pictures of the LCD panel, the boundaries of the screen area and the rims are clearly defined to make the testing module accurately test the defects of the LCD panel and to improve testing quality. | 11-12-2009 |
| 20090289655 | Process condition evaluation method for liquid crystal display module - A process condition evaluation method for a liquid crystal display module (LCM) includes: a first step of obtaining a threshold power measuring pattern, an analysis sample for a cell bonding status in an LCD fabrication process, and obtaining a lower substrate sample by separating an upper substrate from the threshold power measuring pattern; a second step of supplying voltages on a gate pad on the lower substrate sample with sequentially increasing a voltage level by a predetermined unit by using an electrical device, and obtaining a threshold current and a threshold voltage by measuring currents at a drain pad whenever voltage increased by a predetermined unit is applied to the gate pad; and a third step of obtaining threshold power based on the threshold current and the threshold voltage, and thereby evaluating process conditions of the LCM. | 11-26-2009 |
| 20090295424 | Test circuit and method for an electronic device - A test circuit for an electronic device including a liquid crystal display (LCD) device. The LCD device includes a pulse width modulator (PWM) to provide voltages to a display panel of the LCD device, a plurality of feedback circuits to output feedback voltages to the PWM, and a power supply to provide an operating voltage for the PWM. When the electronic device is in a test mode, the feedback circuits respectively decrease the feedback voltages, such that the PWM increases the voltages output to the display panel according to the feedback voltages, the increased voltages reach predetermined test voltages and test the electronic device. | 12-03-2009 |
| 20090295425 | DIRECT DETECT SENSOR FOR FLAT PANEL DISPLAYS - Each sensor of a linear array of sensors includes, in part, a sensing electrode and an associated feedback circuit. The sensing electrodes are adapted to be brought in proximity to a flat panel having formed thereon a multitude of pixel electrodes in order to capacitively measure the voltage of the pixel electrodes. Each feedback circuit is adapted to actively drive its associated electrode via a feedback signal so as to maintain the voltage of its associated electrode at a substantially fixed bias. Each feedback circuit may include an amplifier having a first input terminal coupled to the sensing electrode and a second input terminal coupled to receive a biasing voltage. The output signal of the amplification circuit is used to generate the feedback signal that actively drives the sensing electrode. The biasing voltage may be the ground potential. | 12-03-2009 |
| 20100001756 | ARRAY SUBSTRATE HAVING INCREASED INSPECTION EFFICINCY AND DISPLAY APPARATUS HAVING THE SAME - In an array substrate and a display apparatus, a pixel part has a plurality of gate lines, a plurality of data lines, and a plurality of pixels electrically connected to the gate and data lines. A driving circuit drives the pixel part electrically connected to a first end of the gate lines. An inspection circuit is electrically connected to a second end of the gate lines, and inspects the pixel part in response to an inspection signal externally provided. Thus, positions and causes for defects of the pixel part may be accurately detected, thereby improving inspecting efficiency. | 01-07-2010 |
| 20100007369 | DISPLAY SUBSTRATE AND APPARATUS AND METHOD FOR TESTING DISPLAY PANEL HAVING THE SAME - A display substrate includes a gate pad part, a source pad part, a first static dissipative part, and a first test part. A gate pad part is formed on one terminal of each of a plurality of gate lines and transfers signals to the gate lines. A source pad part is formed on one terminal of each of a plurality of source lines and transfers signals to the source lines. A first static dissipative part disperses static charge that flows into the source pad part. A first test part receives a first test signal, makes electrical contact with the first static dissipative part, and transfers the first test signal to the source lines through the first static dissipative part. A display apparatus including the display substrate transmits first test signals that are uniformly applied to source lines through a first test part, so defects are easily detected through a gross test. | 01-14-2010 |
| 20100033205 | APPARATUS AND METHOD FOR PERFORMING AN ION CONCENTRATION ANALYSIS IN LIQUID CRYSTAL PANEL - The present invention provides an apparatus and method for performing an ion concentration analysis in an LCD panel. The method comprises: adjusting common voltage of an LCD panel to be tested and a standard LCD panel, respectively, and obtaining a first common voltage of the LCD panel to be tested and a first common voltage of the standard LCD panel; adjusting the first common voltage of the standard LCD panel and the first common voltage of the LCD panel to be tested, respectively, according to a predetermined testing voltage; loading a first image to the standard LCD panel and the LCD panel to be tested, respectively, and maintaining the first image in the standard LCD panel and the LCD panel to be tested for a period of time; switching the loaded first image to a second image; and analyzing ion concentration in the LCD panel to be tested on the basis of image sticking levels appearing in the standard LCD panel and the LCD panel to be tested. | 02-11-2010 |
| 20100045334 | DIRECT DETECT SENSOR FOR FLAT PANEL DISPLAYS - Each sensor of a linear array of sensors includes, in part, a sensing electrode and an associated feedback circuit. The sensing electrodes are adapted to be brought in proximity to a flat panel having formed thereon a multitude of pixel electrodes in order to capacitively measure the voltage of the pixel electrodes. Each feedback circuit is adapted to actively drive its associated electrode via a feedback signal so as to maintain the voltage of its associated electrode at a substantially fixed bias. Each feedback circuit may include an amplifier having a first input terminal coupled to the sensing electrode and a second input terminal coupled to receive a biasing voltage. The output signal of the amplification circuit is used to generate the feedback signal that actively drives the sensing electrode. The biasing voltage may be the ground potential. | 02-25-2010 |
| 20100090719 | SWITCH CONTROL UNIT, TEST APPARATUS AND METHOD FOR LIQUID CRYSTAL CELL - The present invention discloses a switch control unit, a test apparatus and method for a liquid crystal cell. The switch control unit controls a signal input to the liquid crystal display driver and controls the output of the signal from the liquid crystal display driver accordingly, and includes a control signal generator and a switch module. The test apparatus for the liquid crystal cell comprises: a switch control unit connected with a gate driver, for controlling ON and OFF of a signal input to the gate driver and controlling ON and OFF of a gate scan signal accordingly. The test method for the liquid crystal cell comprises: inputting a test signal; controlling ON and OFF of a gate scan signal by controlling ON and OFF of a signal input to a gate driver so as to determine the badness positions on a screen. | 04-15-2010 |
| 20100134137 | LIQUID CRYSTAL DISPLAY PANEL AND ITS INSPECTING METHOD - It is an object to provide a liquid crystal display panel that is configured to surely detect a crack or a defect that may result in a big break later with high possibility, so that the output of a poor product can be prevented or the reduction of manufacturing costs can be promoted and, at the same time, a liquid crystal display panel with high reliability can be produced. A liquid crystal display panel ( | 06-03-2010 |
| 20100141293 | LCD PANELS CAPABLE OF DETECTING CELL DEFECTS, LINE DEFECTS AND LAYOUT DEFECTS - An LCD panel includes a plurality of signal lines, a plurality of display units, a driving circuit and a test unit. Each display unit is coupled to a corresponding signal line of the plurality of signal lines. The driving circuit is coupled to corresponding signals lines via a plurality of output ends. The test unit includes a shorting bar, a test pad, and a plurality of switches. Each switch is coupled between a corresponding signal line of the plurality of signal lines and the shorting bar. | 06-10-2010 |
| 20100213969 | LIQUID CRYSTAL DISPLAY AND TEST METHOD THEREOF - A liquid crystal display includes a plurality of pixel electrodes arranged in a matrix and having first and second sub-pixel electrodes differentiated in size from each other. First and second switching elements are connected to the first and second sub-pixel electrodes, respectively. First and second gate lines are connected to the first and second switching elements, respectively. A data line is connected to the first and second switching elements to transmit a data voltage. First and second gate shorting bars are connected to the first and second gate lines, respectively. The gate lines connected to the respective sub-pixels are connected to two or four gate shorting bars to allow an array test and a visual inspection test, and to thereby detect a bridge between respective sub-pixel electrode neighbors in a simplified manner. | 08-26-2010 |
| 20100237896 | LIQUID CRYSTAL DISPLAY DEVICE AND MANUFACTURING METHOD THEREOF - A liquid crystal display panel includes a first substrate, a second substrate, and a liquid crystal layer formed between the first substrate and the second substrate. A pixel area is formed on the first substrate, and a driver is formed on the substrate and electrically connected with the pixel area. A plurality of lines are electrically connected with the driver, and a plurality of pads are electrically connected with the plurality of lines. The plurality of pads are formed in a straight line and are not electrically connected with each other except for the electric connection with the plurality of lines. | 09-23-2010 |
| 20100283501 | TESTING METHOD FOR OPTICAL TOUCH PANEL AND ARRAY TESTER - A testing method for an optical tough panel includes the steps of: coupling a negative voltage to a common line to turn off an optical sensing element; coupling a positive voltage to a readout line; turning on a switching device to have the positive voltage charge the optical sensing element through the readout line and the switching element; turning off the switching element for a predetermined period of time; coupling the negative voltage to the readout line; turning on the switching element again to read a voltage variation of the optical sensing element through the readout line and the switching element; and analyzing the voltage variation. The present invention further provides an array tester. | 11-11-2010 |
