Abstract: A sample holding circuit includes a signal input terminal, a first sampling unit, a second sampling unit, and a holding unit. The signal input terminal receives a first reference voltage or a second reference voltage, the first sampling unit samples the first reference voltage when a first clock signal is triggered to obtain a first sampling voltage, the second sampling unit samples the second reference voltage when a second clock signal is triggered to obtain a second sampling voltage. The holding unit receives the first sampling voltage and the second sampling voltage when a third clock signal is triggered. The sample holding circuit effectively simplifies circuit structure and reduces the use of amplifiers, also improving the signal to noise ratio.

Abstract: A display panel with display and non-display regions has pixel units in the display region. The non-display region defines a bonding region in which there are traces and driving chips. The driving chips are bonded in a flexible printed circuit, and electrically connect with the pixel units. The traces include high-speed signal traces, power traces, and grounding traces. The grounding traces are adjacent to the power traces and so disposed as to shield against electromagnetic interference affecting the signal and power traces, the grounding traces serving as reference ground to the power traces, and form a shield against electromagnetic interference.

Abstract: An electrophoretic display able to operate on a reduced power supply includes a display panel and a driving circuit electrically connected to the display panel. The display panel includes a plurality of first electrophoretic particles and a plurality of second electrophoretic particles. The driving circuit is configured to provide a balance signal to the display panel during a balance period, provide a mixed signal to the display panel during a mixing period, and provide a driving signal to the display panel during a coloring period. The balance period, the mixing period, and the coloring period are sequential in time, and a preset time interval is between each of the periods.

Abstract: A data driving circuit of reduced power consumption by smoothing large voltage changes includes a shift register circuit, a first latch, a second latch, a level shift circuit, a digital-to-analog (DAC) circuit, and an output circuit. The first latch circuit samples the digital signal, the second latch circuit detects a boundary value of the sampled signal in a specified grayscale range. The boundary value of the sampled signal is compared with the boundary value of a previous sampled signal and if different from the previous boundary value, the second latch outputs a compensation control signal being effective; the output circuit sets the voltage of the data line at a specified voltage before outputting the driving voltage to the data line. A display apparatus is also disclosed.

Abstract: A fingerprint-recognition function in a backlit display device includes a cover plate, a display panel, a backlight module, and a fingerprint recognition module. The cover plate has an operating surface defining a touchable fingerprint identification area. The backlight module emits light for the display panel to display images and, as a first detection light, backlighting incident on the fingerprint identification area reflected by a fingerprint is taken and recognized by the recognition module. Along a thickness direction of the display device, a projection of the fingerprint identification module on the cover plate at least partially overlaps with the fingerprint identification area, and supplementary side-mounted sources emitting non-visible light enhance the accuracy of detection of the recognition module.

Abstract: A method for locating a touched position on a touch panel acquires a sensing signal from a sensing area on the touch panel when the touch panel is touched. A determination is made as to whether the sensing signal of the sensing area on the touch panel is a touch signal and if so, sorting all the touch signals to obtain a decreasing sequence of strength of touch signals. Selection of groups of all the touch signals in the decreasing sequence is carried out according to a direction of decrease of strength, to divide all the touch areas into at least one group. Calculating a physical center of each of the at least one group, wherein the touch position of each of the groups is taken as the physical center and point of origin of the coordinates.

Abstract: A liquid crystal display driving method is disclosed, where an interlaced image data is received or generated to generate an odd driving signal and an even driving signal, an odd number of gates and an even number of gates are driven according to the odd driving signal and the even driving signal at different signal frame periods, and sources are driven to inverse in their polarities when the driven gates are switched from the ones having the odd number to the even number. Since an alternating number of the sources is reduced, the efficacy of simultaneous promoted power saving and frame quality is achieved.