摘要:
N drivers convert n digital values into n voltages. N amplifiers amplify the n voltages, thereby generate n drive voltages. An amplifier voltage supply supplies an amplifier voltage for driving the n amplifiers. An amplifier voltage controller detects a maximum digital value among a plurality of digital values, and sets the amplifier voltage to a voltage value dependent on the maximum digital value.
摘要:
N drivers convert n digital values into n voltages. N amplifiers amplify the n voltages, thereby generate n drive voltages. An amplifier voltage supply supplies an amplifier voltage for driving the n amplifiers. An amplifier voltage controller detects a maximum digital value among a plurality of digital values, and sets the amplifier voltage to a voltage value dependent on the maximum digital value.
摘要:
An organic EL display panel includes: a P-type drive transistor having a gate connected to a capacitor and a drain connected to an organic EL element; an N-type drive transistor having a gate connected to the capacitor and a source connected to the organic EL element; a first power source line for applying a first voltage to the P-type drive transistor; a second power source line for applying, to the N-type drive transistor, a second voltage higher than the first voltage. The P-type drive transistor has characteristics such that a first gate voltage value corresponding to a predetermined current value in current-voltage characteristics of the organic EL element is a minimum voltage of the data voltage, and the N-type drive transistor has characteristics such that a second gate voltage value corresponding to the predetermined current value is greater than a third gate voltage value corresponding to a minimum current value of the organic EL element.
摘要:
A video signal compression apparatus extracts a specific value written in a read only memory at every system clock pulse. The specific value can be varied at every clock pulse. Therefore, for example, only the center cart of a picture can be horizontally compressed A FIFO memory may be used. It is possible to select a mode with a fixed compression ratio or a mode in which a compression ratio varies at every clock pulse. Further, the fixed compression ratio can be set from the outside. Display position or the picture can also be changed.
摘要:
A video signal compression apparatus extracts a specific value written in a read only memory at every system clock pulse. The specific value can be varied at every clock pulse. Therefore, for example, only the center part of a picture can be horizontally compressed. A FIFO memory may be used. It is possible to select a mode with a fixed compression ratio or a mode in which a compression ratio varies at every clock pulse. Further, the fixed compression ratio can be set from the outside. Display position of the picture can also be changed.
摘要:
A small scale gain control circuit for controlling gain correction quantity is realized, using the configuration of an inverter, a subtraction circuit, a limiter, and a multiplication circuit. Gain correction quantity is controlled in such a way that in the gradation correcting apparatus a first constant fixes a value beyond which gain correction quantity is zero and a second constant fixes an inclination of the characteristics line.
摘要:
An organic electroluminescence display includes pixels in a matrix that each emits visible light. A data line driver supplies a video signal to each pixel. The video signal includes first and second frames corresponding to first-eye and second-eye image information. A scanning line driver distributes a scanning signal to each pixel for controlling a supply of the video signal. The display includes an emitter in an arrangement position of the pixels in the matrix. The emitter emits infrared light in a same direction as the visible light. The scanning line driver supplies a control signal to the emitter that indicates a switching timing between the first frame and the second frame, and causes the emitter to emit the infrared light based on the control signal for reception by eye glasses for controlling opening and closing of electronic shutters.
摘要:
A stereoscopic display apparatus includes: a plurality of light-emitting devices; a power supply line for supplying current to the light-emitting devices; a switching device provided on the power supply line; a glasses control circuit which generates a glasses control signal for setting, in a pair of shutter-type glasses, a non-viewable period in which both the right-eye image and the left-eye image are made non-viewable at the same time; and a power supply control circuit which generates a device control signal for setting, in the switching device, a voltage reduced period in which the voltage between the electrodes in the light-emitting device is reduced, in which the glasses control circuit and the power supply control circuit control the shutter-type glasses and the switching device, respectively, for setting the non-viewable period to be a period at least from a start to an end of the voltage reduced period.
摘要:
A gradation correcting apparatus, which can be effectively incorporated into various video devices, enables the display of a sub-display within the domain of main-display (i.e. Picture in Picture) and also enables automatic adjustment of each gradation of the display dependent on the characteristics of the respective input signal. By using both a window pulse and a main- and sub-display switching signal, gradation corrections of the displays are carried out such that either no gradation correction is applied to the sub-display or a proper correction is applied according only to the sub-display signal. In this apparatus, the luminance information related to the sub-display and the luminance information related to the main-display excluding that of the sub-display are independently inputted into a signal correction system, thereby allowing individual processing of this information. Moreover, since the signal delay caused by the arithmetic processing can be precisely compensated for by a delay device, the gradation corrections for the main- and sub-displays are exactly executed according to the respective luminance level information, thus realizing an easy-to-see Picture in a Picture.
摘要:
The invention relates to an intensity correction device for automatically adjusting an intensity of an input video signal by detecting luminance characteristics of the input signal, and provide intensity correction with maintaining clear image by reducing magnitude of the correction signal or by not effecting correction when the luminance level of the input luminance signal is concentrated to a certain luminance level. The intensity correction device includes a histogram memory, a look-up table operating circuit, a look-up table, a maximum value detecting circuit, and an inverter and a multiplier, limiter, or a gain control circuit. By this, when a luminance level of the input video signal is concentrated to a certain luminance level, magnitude of the correction signal can be reduced or made zero. Therefore, by detecting the characteristics of the input image, the intensity of the input video signal can be automatically corrected to the optimal image for providing better picture quality.