Patent application number | Description | Published |
20100315394 | DISPLAY APPARATUS - The present invention provides a display apparatus with image capturing function including optical sensors in its pixels, particularly a display apparatus capable of capturing an image while suppressing the power consumption. The display apparatus includes: optical sensors and sensor wirings provided in a pixel region of an active matrix substrate; a sensor row driver for selecting the optical sensors row by row; a sensor pixel readout circuit for reading out signal charges from the optical sensors in the selected row; a sensor column amplifier including the number of amplifiers corresponding to the rows of the optical sensors for generating a sensor output voltage; a sensor column scanning circuit for selecting the signal charges readout by the sensor pixel readout circuit column by column so that the selected signal charges being outputted to the sensor column amplifier; and a buffer amplifier ( | 12-16-2010 |
20110068829 | COMPARATOR CIRCUIT AND DISPLAY DEVICE PROVIDED WITH THE SAME - An inverter is configured by double gate TFTs, and an inverter is configured by double gate TFTs. Top gate terminals of the TFTs that configure the inverter are connected to an input terminal DAT(+), and bottom gate terminals are connected to an output of the inverter and an output terminal OUT. Bottom gate terminals of the TFTs that configure the inverter are connected to an input terminal DAT(−), and bottom gate terminals are connected to an output of the inverter. With this, threshold voltages of the inverters are controlled so as to facilitate switching operations of the inverters, and whereby the comparator circuit operates at a high speed. It is possible to obtain a comparator circuit that is insusceptible to a variation in the threshold voltages of the transistors and fluctuation of a common mode voltage of an input signal and capable of operating at a high speed. | 03-24-2011 |
20110074755 | CAPACITIVE LOAD DRIVE CIRCUIT AND DISPLAY DEVICE INCLUDING THE SAME - A buffer circuit drives a capacitive load based on a voltage Vin. In a setup period, switches are in an ON state, and in a drive period, a switch is in an ON state. A voltage comparison unit compares the voltage Vin in the setup period and a voltage Vout in a drive period to output a comparison result voltage. A push-pull output unit includes a TFT for charge and a TFT for discharge. A drive control unit controls the TFTs to be in an OFF state in the setup period, and in the drive period, selectively controls the TFTs to be in an ON state in accordance with the comparison result voltage. If Vout03-31-2011 | |
20110199329 | CAPACITANCE CHANGE DETECTING CIRCUIT - When a surface of a liquid crystal panel is pressed, the capacitance value of a variable capacitor changes. In at least one embodiment, one electrode of the variable capacitor is connected to a voltage supply line to which a common voltage is applied, and the other electrode of the variable capacitor is connected to a gate electrode of a TFT. The TFT outputs a voltage generated according to the capacitance value of the variable capacitor. One electrode of a control capacitor is connected to the gate electrode of the TFT, and the other electrode of the control capacitor is connected to a control voltage line to which a control voltage is applied. By applying a control voltage to the gate electrode of the TFT through the control capacitor, while the load capacitance of the control voltage line is reduced and a change in capacitance is detected with a high sensitivity, the sensitivity can be adjusted according to the application, person, etc., when used. By this, a capacitance change detecting circuit is provided that can detect a change in capacitance with a high sensitivity and can control the sensitivity when used. | 08-18-2011 |
20120002149 | OPTICAL SENSOR AND DISPLAY DEVICE PROVIDED WITH SAME - An optical sensor is provided with a photodiode (D | 01-05-2012 |
20120176356 | DISPLAY DEVICE - A plurality of sensor pixel circuits are disclosed for detecting a difference between an amount of light when a backlight is turned on and an amount of light when the backlight is turned off are arranged in a pixel region. The backlight is turned on and off a plurality of times, respectively, in a one-frame period. Each of reset for the sensor pixel circuits and read from the sensor pixel circuits is performed in parallel, each in a line sequential manner over almost the one-frame period. A plurality of sensor pixel circuits of two types for separately detecting an amount of light when the backlight is turned on and an amount of light when the backlight is turned off may be arranged in the pixel region, and a difference circuit may be used for obtaining a difference between the two types of amounts of light. | 07-12-2012 |
20120262424 | Display Device - A plurality of sensor pixel circuits each including two photodiodes, one accumulation node accumulating charge corresponding to an amount of light, and a read transistor having a control terminal connected to the accumulation node are arranged in a pixel region. In accordance with a clock signal, when a backlight is turned on, a transistor turns on, a current flows through the photodiode, and a potential at the accumulation node drops. When the backlight is turned off, a transistor turns on, a current flows through the photodiode, and the potential at the accumulation node rises. Sensitivity characteristics of the two photodiodes may be changed using the clock signal. The sensor pixel circuit described above is used for detecting a difference between an amount of light to be incident when the backlight is turned on and an amount of light to be incident when the backlight is turned off. | 10-18-2012 |
20120268701 | DISPLAY DEVICE - Disclosed is a display device provided with a photosensor, which can improve sensor sensitivity without affecting display. The display device includes: a photosensor (FS) provided in a display region ( | 10-25-2012 |