34results about How to "Brightness effect" patented technology

The invention provides a camera device which can expose the face and body of the imaged person at the same time. The camera device comprises a CCD101 for inputting the image data corresponding to the image person; a face detection unit which is executed by a CPU module 104c in a digital camera microprocessor 104 and used for detecting the face from the picture obtained from the image data outputted by the CCD10; a first photometric unit which is executed by the CPU module 104c and used for using the face detected by the CPU module 104c as the photometric area for photometering; a second photometric unit which is executed by the CPU module 104c and used for judging the upward and downward direction of the face and using the lower part of the face as the photometric area for photometering; an exposure control unit which is executed by the CPU module 104c and used for calculating the exposure amount according the photometering results of the first photometric unit and the photometric unit and then for controlling the exposure according to the calculated exposure amount.

The present invention provides a backlight adjustment method, a backlight adjustment system and a display device. The backlight adjustment method comprises: dividing a frame of picture into n image blocks, obtaining the sub-backlight brightness corresponding to each image block, and further comprises: calculating an average backlight brightness corresponding to the frame of the picture on the basis of each sub-backlight brightness, determining whether the sub-backlight brightness needs to be enhanced on the basis of the average backlight brightness, and performing enhancement for the sub-backlight brightness which needs to be enhanced, wherein n is an integer greater than 1. The backlight adjustment method not only solves the problems of reduced brightness for bright picture and poor display effect associated with existing backlight adjustment method, but also reduces the overall display power consumption, increase the image contrast and reduce influence of mura (ripple phenomenon) on the screen.

The present invention relates to an OLED pixel circuit and a driving method thereof, a display panel and a display device. The OLED pixel circuit includes a charging control module, a driving transistor, a reset control module, a light-emitting control module and a light-emitting device; the charging control module is connected to the data line and the reset control module, and is used for introducing the data signal provided by the data line to the reset control module module; the reset control module is connected with the driving transistor, and is used for resetting and compensating the driving transistor according to the data signal, so that the control electrode of the driving transistor has a first preset potential; the driving transistor is used for according to the potential of its source and its The first preset potential of the control electrode generates a driving current that makes the light-emitting device emit light; the light-emitting control module is connected between the driving transistor and the light-emitting device, and is used for controlling the connection or disconnection of the driving transistor and the light-emitting device. The above-mentioned OLED pixel circuit can avoid the attenuation of the reference voltage signal and the change of the threshold voltage from affecting the display effect.

The invention provides an LED lamp box, comprising a lamp box external frame and an LED reflector in the external frame, the LED reflector is formed by a plurality of independently-detachable reflector module groups, each reflector module group comprises a box body, the box body is provided with a transparent front cover and a rear cover; the inner of the box body is provided with at least a reflecting board, the reflecting surface of the reflecting board is opposite to the transparent front cover; and the reflecting board is provided with a plurality of LED installation parts. The LED lamp box is advantageous in that, via the sealed box body, an LED lamp is isolated from the outside world in use, preventing an LED light source from influencing brightness of the lamp box due to adsorbed dust; and the reflector module groups can separate the whole reflecting board into a plurality of module groups for assembly, a single module group is not only advantaged by light weight and small volume, but is also advantaged by accommodation in the box body, even a single person can easily complete installation or maintenance work, particularly for a bottom cover opening or side cover opening type lamp box, assembling and disassembling operations of the module group at the cover opening position can be easily performed in a very small operation space, and the lamp box structure can also make whole light of the lamp box be more uniform.

A luminous components circuit frame is used to join the luminous components in flexible printing circuit. Multiple luminous components can also form this frame, and the multiple luminous components circuit is paralleled in the flexible circuit board. Each luminous component at least first component located on the first side of flexible circuit board and second component located on the second side of flexible circuit board. The input current is on first side and through first and second luminous components and is outputted from second side.

A luminous components circuit frame is used to join the luminous components in flexible printing circuit. Multiple luminous components can also form this frame, and the multiple luminous components circuit is paralleled in the flexible circuit board. Each luminous component at least first component located on the first side of flexible circuit board and second component located on the second side of flexible circuit board. The input current is on first side and through first and second luminous components and is outputted from second side.

A circuit arrangement for organic light-emitting diodes can be arranged in a two-dimensional matrix. It can in particular be used with microdisplays. It can allow a wide influencing of the brightness of the electromagnetic radiation emitted by the organic light-emitting diodes. Every organic light-emitting diode can be controlled by means of a storage circuit, a sense amplifier and a driver circuit using the circuit arrangement. The driver circuit can be formed by at least three transistors connected in series and a further output transistor whose drain is connected to the anode of the respective organic light-emitting diode. In this respect, the transistor acting as the driver can have a constant electric operating voltage LVDD applied at its source and a further likewise constant electric operating voltage Vdrive is applied to its gate. The drain of the first transistor to the source of the following transistor connected to it in series and the two gates of the following transistors which form a switch and are connected in series are connected to the output of the sense amplifier and are acted on by its electric output voltage VSenseOut. The drains of the two transistors forming the switch are connected to the source of the output transistor whose gate is connected to ground potential or to which negative electric voltage is applied.

This invention relates to a method which is able to high efficiency color shellac and acidy shellac alcohols solution, lend itself to industrial production. This invention has follow steps: (1) first prepare shellac alcohols solution, add acidoid, adjust ph value for acidic; (2) Add micro crystalline cellulose prestained to above solution, the dosage is 0.1 to 40 percent of shellac alcohols solution weight. (3) Uniform mixing above solution; adopt whip vibration or neutral gas aeration method. The finished product is able to use as different kinds of toner, ink and dope for staining. Drying the liquid is able to obtain stained shellac.

The present invention provides an OLED lighting screen with series-connected light-emitting elements and a preparation method thereof, wherein the OLED lighting screen is divided into N light-emitting areas, and each light-emitting area includes M light-emitting elements connected in series. When different light-emitting elements in each light-emitting region act as anti-short-circuit resistors for each other, and when a short-circuit defect occurs in one light-emitting element, other light-emitting elements connected in series with it can play a role in preventing short-circuit. When M is greater than or equal to 2 and N is greater than or equal to 50, even if a short-circuit defect point appears in a certain light-emitting area, the current value in this light-emitting area will only decrease by less than 2%, so there is almost no effect on the brightness of the lighting screen. influences. That is to say, through the above solution, a very simple structure can be adopted to ensure that the brightness of the lighting screen body is not affected while achieving the effect of preventing short circuit.