摘要:
An optical touch module and an optical touch display panel are provided. The optical touch module includes a first photo sensor, a second photo sensor, and a signal processing unit. The first photo sensor is disposed in one of the plurality of pixels of a pixel array. A first terminal and a control terminal of the first photo sensor are coupled to a first scan line. The second photo sensor has a first terminal coupled to a second terminal of the first photo sensor and outputting a sensing voltage, a control terminal coupled to the first terminal of the second photo sensor, and a second terminal receiving a first voltage. The signal processing unit is coupled to the first terminal of the second photo sensor, so as to convert the sensing voltage to a touch signal.
摘要:
A method and an apparatus for over-driving a liquid crystal display (LCD) are provided, which are suitable for compensating a gray level brightness of the LCD. The method includes the following steps. Firstly, a data buffer unit outputs a current frame data. Then, the current frame data is stored into a frame memory unit, and the frame memory unit outputs a previous frame data. Next, several look-up tables (LUTs) are searched for a driving voltage in a corresponding LUT according to the current frame data and the previous frame data. Afterward, a position scanning unit receives the current frame data to determine a current position. Finally, a multiplexer outputs the corresponding driving voltage at the current position. Thus, a display panel has the same gray level brightness in upper, middle, and lower portions thereof, thereby avoiding ghosting.
摘要:
A liquid crystal display device for improving color washout problem is disclosed in the present invention, in which storage capacitors of two sub-pixels of a pixel are electrically connected to a next scan line and a next scan line of the next scan line, respectively, in order for utilizing driving signals of the two scan lines to modulate voltages of the storage capacitors, so as to make the two sub-pixels have different driving voltages.
摘要:
A gate driving circuit of a LCD comprises a plurality of drivers, a timing processor, a trigger signal processor, a delay unit, and a logic unit for producing an output enable signal. Further, transferring the signal to the gate driver of a LCD can efficiently control the charging time of each region in the LCD. The main object of the gate driving circuit of a LCD is that block dim phenomenon in each light crystal region will be restrain, and the visualization of the LCD can be enhanced.
摘要:
The present invention discloses a method for driving thin film transistor liquid crystal display (TFT-LCD) and the storage medium for storing computer program representative of the method thereof. The method utilizes a timing controller to send polarity control signals to a plurality of source drivers in a TFT-LCD panel for changing the polarity distribution of the liquid crystal molecules in the panel. The method is characterized by dynamically changing the positions of polarity inversion for alleviating the problem of undercharging under high resolution and high frequency conditions; utilizing both polar and reverse polar driving signals for solving the problem of color shift in “checker board” checking signals; and providing a mechanism for mending the problem of undercharging of the first horizontal line.
摘要:
A display panel driving voltage supply apparatus and method is disclosed. Said supply apparatus comprises: a timing controller for providing a voltage control signal and a switch control signal; a level shifter, receiving the voltage control signal for selecting a first specified voltage to be transmitted on a first driving voltage supply line as well as selecting a second specified voltage to be transmitted on a second driving voltage supply line according to the voltage control signal; and a first switch, wherein the first and the second driving voltage supply lines are electrically connected with each other to charge share between the first and the second specified voltages when the first switch is turned on under the control of the switch control signal. Said supply apparatus is capable of solving the problem of high power consumption and thereby reducing the electricity consumption.
摘要:
A liquid crystal display driving device for improving power on delay includes a gate driving circuit, a source driving circuit, and a timing control circuit. The timing control circuit is coupled to the gate driving circuit for transmitting a low-frequency frame rate lower than a normal frame rate of the liquid crystal display to operate the gate driving circuit for a predetermined number of clock cycles when a liquid crystal display powers on. Then, adjust the low-frequency frame rate to the normal frame rate of the liquid crystal display according to a trigger signal of the timing control circuit. And operate the liquid crystal display according to the normal frame rate.
摘要:
A stereoscopic image displaying method provides a data driving signal related to a right-eye image and a left-eye image. During a plurality of frame periods, the data driving signal switches polarities every m frame periods, wherein m is an integer larger than 1. The right-eye image is outputted during the odd-numbered frame periods among the plurality of frame periods, while the left-eye image is outputted during the even-numbered frame periods among the plurality of frame periods.
摘要:
A method and an apparatus for over-driving a liquid crystal display (LCD) are provided, which are suitable for compensating a gray level brightness of the LCD. The method includes the following steps. Firstly, a data buffer unit outputs a current frame data. Then, the current frame data is stored into a frame memory unit, and the frame memory unit outputs a previous frame data. Next, several look-up tables (LUTs) are searched for a driving voltage in a corresponding LUT according to the current frame data and the previous frame data. Afterward, a position scanning unit receives the current frame data to determine a current position. Finally, a multiplexer outputs the corresponding driving voltage at the current position. Thus, a display panel has the same gray level brightness in upper, middle, and lower portions thereof, thereby avoiding ghosting.
摘要:
Each pixel of an LCD display includes a main pixel, a sub-pixel, a resistor, and a third switch. The third switch is used for controlling the charging time of the main pixel and the sub-pixel. A data signal of a main pixel of a previous pixel is utilized to pre-charge the main pixel and the sub-pixel, and then data is transmitted to the sub-pixel and the main pixel. When data transmission to the sub-pixel is ended, the data transmission path to the sub-pixel is switched off, and the data keeps being transmitted only to the main pixel. The LCD panel utilizing this method only needs to add one gate line at each of the top and bottom of the panel to realize the AMVA structure of 8-domain for the LCD panel.