摘要:
The invention has: a first register that is set when receiving a CEC message which a video signal source reads an EDID of a video transmitting apparatus and issues and is reset in response to a leading edge of 5V that is supplied from the video signal source; and a second register which reads an EDID of a video displaying apparatus, is set when it is decided that the video displaying apparatus is a predetermined video displaying apparatus, and is reset when a state where an HPD is in a state of “L” has continued for a predetermined period of time or longer. Only when both of the first and second registers have been set, it is determined that a predetermined video signal source, the video transmitting apparatus, and the video displaying apparatus have directly been connected.
摘要:
According to our invention, linked operation between a monitor apparatus for displaying images, and a set-top box for transmitting image signals to the monitor apparatus via a required interface, can be achieved properly, even if both units are constructed in casings separate from each other. The monitor apparatus uses a CEC line to transmit a CEC vendor command including at least a code associated with unit information, and the set-top box apparatus transmits the CEC vendor command including at least the code associated with the unit information. Upon receiving the vendor command from the set-top box apparatus, the monitor apparatus switches to the linked operation with the set-top box.
摘要:
The invention has: a first register that is set when receiving a CEC message which a video signal source reads an EDID of a video transmitting apparatus and issues and is reset in response to a leading edge of 5V that is supplied from the video signal source; and a second register which reads an EDID of a video displaying apparatus, is set when it is decided that the video displaying apparatus is a predetermined video displaying apparatus, and is reset when a state where an HPD is in a state of “L” has continued for a predetermined period of time or longer. Only when both of the first and second registers have been set, it is determined that a predetermined video signal source, the video transmitting apparatus, and the video displaying apparatus have directly been connected.
摘要:
An image processing apparatus has an input portion for receiving video signals, an illumination sensor for detecting illumination of an environmental light, a corrector for correcting the video signals, and a controller for controlling the corrector to correct the video signals in accordance with distribution of luminance or hue or saturation of the video signals and with the detected illumination when any change occurs in the video signal. The apparatus further has a detector for detecting a change of the video signals in accordance with a mean value of luminance of the inputted video signals, a corrector for correcting the video signals, and a controller for controlling the correction portion to correct the video signals in accordance with distribution of luminance or hue or saturation of the video signals when the detector detects the change of the video signals.
摘要:
An object of the present invention is to provide an image display technology with which high contrast can be stably obtained.In order to achieve the above object, the present invention changes the gain of a digital luminance signal by feeding back information on maximum and average luminance levels of the luminance signal, adjusts image contrast, and in accordance with the average luminance level detected from the feedback system, controls the illuminance of the backlight applied to a display unit. The control increases the illuminance of the backlight when the detected average luminance level is higher than the upper-limit value of a previously set reference range, and reduces the illuminance when the detected average luminance level is lower than the lower-limit value of the reference range.
摘要:
The present invention provides a technique for performing gamma correction processing when there are a plurality of characteristic areas, each of which is characterized by the high frequency in a luminance histogram to improve the impression of contrast. According to the present invention, a luminance characteristic detector (4) detects the luminance of an input image signal and a microcomputer (5) calculates an APL and a luminance histogram of an input image signal. A gamma correction circuit (6) performs the gamma correction processing in response to the luminosity of the input image signal by use of the result of the calculation carried out by the microcomputer (5). Then, if there are a plurality of characteristic areas, each of which is characterized by the high frequency in the luminance histogram, a characteristic emphasis circuit (7) performs grayscale extension processing for the plurality of characteristic areas. This makes it possible to perform the most suitable processing in response to the input image signal so that the impression of contrast is improved.
摘要:
An image display apparatus includes a backlight unit including a plurality of light sources arranged in a flat, a reflecting portion for reflecting light from the light sources, a diffuser for diffusing the light from the light sources and the light reflected from the reflecting portion, and a chassis for maintaining or supporting the light sources, the reflecting portion and the diffuser; and a liquid crystal display unit which receives the light diffused by the diffuser of the backlight unit. Concave portions are formed in the chassis at positions corresponding to electrodes of the plurality of light sources, positions corresponding to light-emitting portions of the light sources are arranged in a flat, and a circuit for driving the liquid crystal display unit is provided on a rear surface of a planar portion of the chassis. Accordingly, it is possible to realize a thin lightweight backlight with high luminance and high luminance uniformity.
摘要:
A disclosed technique for adjusting the image quality uses a moving picture for a sample stored in advance on a storage medium. A plurality of sample moving picture images, based on the moving picture for a sample read from the storage medium, having different image quality relative to each other are displayed on the screen. This technique enables confirmation of how the actual image having been subjected to the image quality adjustment would be displayed in an apparatus for displaying a moving image, such as a television receiver, because the sample stored on the storage medium is a moving picture.
摘要:
A noise reduction signal processing apparatus for reducing noises accurately, such as for use in a display apparatus for displaying a video signal, has a median filter (40) which receives the video signal, and which executes a filter processing on the inputted video signal and outputs a reference signal; a subtracter (50) which is connected with the median filter (40), and which outputs a difference signal that indicates a difference between a reference signal outputted from the median filter (40) and the video signal; a minimum value detection circuit (70) which outputs the difference signal from the subtracter (50) or a limitation value, whichever is smaller, as a minimum value signal; and an adder (35) which adds a noise reduction signal obtained on the basis of the minimum value signal output from the minimum value detection circuit (70) and the video signal.
摘要:
An image display apparatus includes: a plurality of light sources for emitting light; an optical uniformizing portion for uniformizing light emitted from the plurality of light sources; a total reflection portion disposed above the plurality of light sources, the total reflection portion totally reflecting light from the optical uniformizing portion; an optical guide portion for guiding light totally reflected at the total reflection portion; an optical diffusion unit for diffusing light from the total reflection portion and outputting the diffused light; an optical parallelizing unit for parallelizing light from the optical diffusion unit; and a liquid crystal panel for modulating light from the optical parallelizing unit into an optical image in accordance with an image signal and displaying the optical image.