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Backlight Control
Liquid Crystal
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Backlight Control patents



      
           
This page is updated frequently with new Backlight Control-related patent applications. Subscribe to the Backlight Control RSS feed to automatically get the update: related Backlight RSS feeds. RSS updates for this page: Backlight Control RSS RSS


Date/App# patent app List of recent Backlight Control-related patents
08/14/14
20140225935
 Liquid crystal display backlight control patent thumbnailLiquid crystal display backlight control
To improve contrast ratio of the image on a backlit display plane such as a liquid crystal display (“lcd”), each area of the image that has separately controllable backlight may be given full backlight until an average or composite brightness of the image in that area is less than a threshold value at which light leakage through the image from full-strength backlight begins to be noticable by a viewer. For image areas with composite brightness less than that threshold, backlight brightness may be reduced in proportion to how much below the threshold the area's composite image brightness is.
06/12/14
20140159614
 Methods and apparatus for improving backlight driver efficiency patent thumbnailMethods and apparatus for improving backlight driver efficiency
An electronic device may be provided with display circuitry that includes a display timing controller, a backlight driver, a light source, and other associated backlight structures. The backlight control circuitry may generate a control signal having an adjustable duty cycle to the backlight driver.
05/01/14
20140118416
Display having low power consumption
A backlight module of a display provides a backlight controlled by a switch. A first electrochromic film comprises a plurality of first electrochromic devices which may each be powered on to appear white or transparent, and a first power supply module.
04/17/14
20140104323
 Liquid crystal monitor device, display system, and backlight control method patent thumbnailLiquid crystal monitor device, display system, and backlight control method
A parent device which is a liquid crystal monitor device serving as a reference for adjusting the backlight distributes, through communication, a backlight-setting value indicating luminance of a backlight to an child device which is a liquid crystal monitor device receiving adjustment of the backlight. A processing unit in the child device obtains a correction value from the backlight-setting value of the parent device received by a reception unit and a backlight-setting value input to an adjustment switch by the user.
04/10/14
20140097765
 Devices and methods for controlling brightness of a display backlight patent thumbnailDevices and methods for controlling brightness of a display backlight
Devices and methods for controlling brightness of a display backlight are provided. A display backlight controller may control the brightness of the display backlight by changing a duty cycle of a pwm signal that drives the led current.
04/03/14
20140091999
 Multiple hardware paths for backlight control in computer systems patent thumbnailMultiple hardware paths for backlight control in computer systems
The disclosed embodiments provide a system that drives a display from a computer system. The system includes a first hardware path for controlling a backlight of a display of the computer system.
03/27/14
20140085354
 Display apparatus and a method of driving the same patent thumbnailDisplay apparatus and a method of driving the same
A display device includes a display panel, a timing controller, a data driver, a gate driver and a backlight unit. The gate driver sequentially outputs gate signals to gate lines.
03/20/14
20140078193
 Generation of tone mapping function for dynamic pixel and backlight control patent thumbnailGeneration of tone mapping function for dynamic pixel and backlight control
Systems, methods, and devices are provided for generating a tone mapping function used in adjusting the power consumed by a backlight of an electronic display. One such method includes sampling an image frame in framebuffer space and generating a tone mapping function in linear space.
03/20/14
20140078192
 Temporal filtering for dynamic pixel and backlight control patent thumbnailTemporal filtering for dynamic pixel and backlight control
Systems, methods, and devices are provided for temporal filtering of tone mapping slopes used in adjusting the power consumed by a backlight of an electronic display. One such method involves computing a current first target slope of an intermediate tone mapping function based at least in part on characteristics of a current image frame and temporally filtering the current first target slope to obtain a current first transition slope.
03/20/14
20140078166
 Histogram generation and evaluation for dynamic pixel and backlight control patent thumbnailHistogram generation and evaluation for dynamic pixel and backlight control
Systems, methods, and devices are provided for histogram generation and evaluation used in adjusting the power consumed by a backlight of an electronic display. One such method involves generating a pixel brightness histogram of an image frame passing through a pixel pipeline in a nonlinear space.
03/13/14
20140071172
Reduced backlight turn on time
Systems, devices, and methods for using a hot plug detect (hpd) signal to reduce turn on time of a backlight of a display are disclosed. The backlight controller may pre-charge the backlight based at least in part on receiving the hpd signal prior to receiving a bl_en signal to turn on the backlight.
03/13/14
20140071032
Method for driving liquid crystal display device
A low-resolution image is displayed at high resolution and power consumption is reduced. Resolution is made higher by super-resolution processing.
03/06/14
20140063380
Display apparatus and method of driving the same
A display apparatus includes a display panel which includes a plurality of pixels, a backlight unit which includes a plurality of light sources sequentially arranged in a first direction of the display panel and provides light to the display panel, and a driving circuit which controls the display panel to allow an image to be displayed on the display panel and generates a plurality of backlight control signals to periodically turn on and off the light sources. The driving circuit generates the backlight control signals to allow the light sources to have different turn-on time periods based on positions of the light sources..
02/20/14
20140049527
Dynamic backlight control with color temperature compensation
A display device comprises: a display screen, a pixel layer, a backlight, and at least one ambient light sensor (als) which detects ambient light around the display device. An optimal power and color adjustment module (opcam) (a) receives detected ambient light information, (b) identifies characteristics of the ambient light, including brightness and color temperature, (c) selects a pre-calculated combination of power level and color details that collectively enables pre-determined acceptable display quality of images displayed on the display screen within the particular viewing space, and (d) respectively forwards the pre-calculated power level and color details to concurrently trigger the backlight drive current controller and the pixel layer controller to provide a specific amount of drive current to the backlight and specific color characteristics, including an amount of color intensity of the pixel layer, which collectively yields the pre-determined display image quality, while optimizing power usage by the display device..
02/13/14
20140043371
Display control for multi-primary display
A controller for a multi-primary display having m>3 primaries receives a set of input n-primary image color defining values comprising drive values for n primaries for each pixel. A compensator (317) generates a set of compensated n-primary image color (n>=3) defining values by applying a luminance compensation to the values of the set of input n-primary image color defining values where the luminance compensation for each pixel depends on the chromaticity of the pixel.
01/09/14
20140009510
Display device with backlight dimming compensation
A light emitting display device with backlight dimming compensation. A backlight emits light based on a backlight control signal.
01/09/14
20140009075
Backlight control circuit with under current detection and start-up control
The present invention discloses a backlight control circuit, comprising: a voltage supply circuit for receiving an input voltage and generating an output voltage under control by a control signal; at least one voltage comparison path respectively coupled to at least one light emission device path; a voltage operative amplifier circuit for generating the control signal according to a lowest voltage on the at least one voltage comparison path; and at least one under current detection circuit for detecting whether a corresponding one of the at least one light emission device path is in an under current status, whereby when anyone of the under current detection circuits detects the under current status, it sends an exclusion signal excluding a corresponding one of the at least one voltage comparison path from being an effective input of the voltage operative amplifier.. .
12/05/13
20130321495
Display device
A liquid crystal display device (1), which is provided with a liquid crystal panel (display unit) (2) and a backlight device (backlight unit) (3), and which displays information by dividing one frame period into four sub-field periods. In the liquid crystal display device (1), a backlight control unit (23) controls a drive for lighting light-emitting diodes (4,4b) in such a manner that a first lighting period for emitting white light and a second lighting period for emitting blue light alternate in two sequential sub-field periods.
11/21/13
20130308068
Backlight control method, apparatus and 3d display system
A method includes dividing a backlight source and a liquid crystal panel into n row sections, preprocessing 3d images to output first images and second images of left and right eyes in a complementary format, while preserving odd and even row section images of original images of the left and right eyes, and sequentially scanning the first images and second images of the left and right eyes from top to bottom using the backlight source. The method further includes, after scanning a row section, controlling the backlight of the row section to be turned on and then turned off until the same row section of a next image starts to be scanned, and repeating until all images are scanned.
10/31/13
20130285995
Circuit with power saving function
A circuit with power saving function connected to a lcd includes a display signal output module, to output a display control signal; a boosting circuit; a content adaptive backlight control (cabc) control module, to output a cabc signal; and a combining circuit, connected between the display signal output module and the cabc control module, to combine the display control signal outputted by the display signal output module and the cabc signal outputted by the cabc control module, then output a combined signal to an input port of the boosting circuit. The boosting circuit is configured to boost the combined signal and output a boosted combined signal to the lcd, thereby changing the backlighting of the lcd to save energy..
10/31/13
20130285560
Terminal apparatus, backlight control method, and backlight control program
A terminal apparatus includes a display device; a first sensor configured to detect a proximity state of being in proximity to an object different from the terminal apparatus; a second sensor configured to detect vibrations; and a processor, wherein the processor determines whether or not a first detection value acquired from the first sensor indicates that the terminal apparatus is in the proximity state, turns off a backlight of the display device in accordance with the first detection value, and acquires, when it is determined that the first detection value does not indicate that the terminal apparatus is in the proximity state, a second detection value from the second sensor, determines whether or not the second detection value, which has been acquired, indicates that the terminal apparatus is vibrating, and turns off the backlight of the display device in accordance with the second detection value.. .
10/24/13
20130278175
Keyboard backlight driver ic
One embodiment of a display backlight driver integrated circuit can be configured for operation in at least two different ways. A first method transfers data from an eeprom to hardware registers prior to regular operation.
10/24/13
20130278171
Display backlight driver ic configuration
One embodiment of a display backlight driver integrated circuit can be configured for operation in at least two different ways. A first method transfers data from an eeprom to hardware registers prior to regular operation.
10/24/13
20130278170
Detection circuit for keyboard cable
One embodiment of a display backlight driver integrated circuit can be configured for operation in at least two different ways. A first method transfers data from an eeprom to hardware registers prior to regular operation.
10/17/13
20130271506
Backlight control method and backlight system
A backlight control method for a backlight module corresponding to a display panel is disclosed, which includes the steps of dividing the backlight module into a plurality of backlight areas, calculating a first blanking period, a active pixel period and a second blanking period of an image frame, sequentially turning on light sources of the plurality of backlight areas to provide backlights for the display panel during the active pixel period, wherein light sources of each backlight area is turned on and lasted to a light-on duration, the active pixel period begins at a time point of displaying the first active pixel of the image frame and ends at a time point of displaying the last active pixel of the image frame.. .
09/12/13
20130234922
Backlight controlling apparatus, backlight controlling method and program
A timing controller performs control to cause a backlight to emit light at first brightness for a first time in a period that original image data is displayed on a liquid crystal panel, and cause the backlight to emit light at second brightness darker than the first brightness for a second time longer than the first time in a period that intermediate image data generated based on the original image data is displayed on the liquid crystal panel.. .
08/22/13
20130215104
Display for displaying three-dimensional images and method for displaying three-dimensional images
A display includes a gravity sensor, a timing controller, a backlight module, a first liquid crystal panel, a liquid crystal driver, and a second liquid crystal panel. The gravity sensor generates a direction signal.
08/22/13
20130215103
Double-layer switchable stereo liquid crystal display and operation method thereof
A double-layer switchable stereo liquid crystal display includes a timing controller, a microprocessor, a backlight module, a first liquid crystal panel, a controller, and a second liquid crystal panel. The timing controller receives an image signal and generates a left/right eye signal and a two-dimensional/three-dimensional control signal.
08/01/13
20130194520
Stereoscopic image displaying system and method
A stereoscopic image displaying system and method are disclosed. The system comprises a display panel for periodically displaying a left-eye image and a right-eye image; a backlight plate that is divided into a plurality of regional light sources from top to bottom; a backlight controller for providing control signals to turn on the regional light sources, wherein in one image frame displaying period, the time points for turning on the respective regional light sources are different from each other, and turn-on durations are different from each other as well; and a pair of shutter glasses comprising a left-piece eyeglass and a right-piece eyeglass that are periodically and alternatively turned on and of for respectively receiving the left-eye image and the right-eye image.
07/11/13
20130176200
Terminal device and backlight illumination method for display thereof
A terminal device includes a display (1) displaying information, a backlight control unit (3) controlling backlight luminance of the display, an illuminance sensor (4) detecting a surrounding brightness, an opening/closing detection unit(5) detecting opening or closing of the housing, a memory (6) storing a predetermined luminance value and a luminance correction value for illuminance, and a control unit (7) controlling the display, the backlight control unit, the illuminance sensor, the opening/closing detection unit and the memory. When the opening/closing detection unit detects the change of the state of the housing from the closed state to the open state, the control unit reads the predetermined luminance value from the memory, causes the backlight control unit to light the display backlight at that luminance value, and then causes the backlight control unit to change the luminance of the display backlight according to the surrounding brightness detected by the illuminance sensor and the luminance correction value for illuminance stored in the memory..
05/16/13
20130120660
Video-display control device
In a video display control device, a control data generating section allocates a part of a dynamic range of a high gradation region of a video signal to a low gradation region, and a backlight controlling section controls a light emission luminance of a backlight so as to cancel an increase or decrease of a mean luminance of a video displayed on a screen in accordance with an increase or decrease of the mean luminance of a video signal after correction with respect to a mean luminance of the video signal.. .
05/16/13
20130120480
Display driver
In a display driver, a first backlight control unit using a histogram and a second backlight control unit using an optical sensor can be used in combination. The display driver includes a pwm generating unit setting a control signal value consisting of a product of a luminance rate of x % and a luminance rate of y % as a luminance rate of a control signal for controlling a backlight with respect to maximum backlight luminance when a luminance rate of a control signal obtained by first backlight control with respect to the maximum backlight luminance is x % and a luminance rate of a control signal obtained by second backlight control with respect to the maximum backlight luminance is y %..
05/16/13
20130120471
Image display apparatus, display control apparatus thereof, and scaler chip image
A display control apparatus applied for an image display apparatus having a plurality of display regions is provided. The display regions are respectively corresponding to a plurality of backlight modules and the luminance of the backlight modules are independently controlled.
05/09/13
20130112880
Display device
A photosensor-equipped display device is provided having a combination of visible and non-visible light sources where a voltage drop is minimized when the non-visible light sources are turned on. The display device includes: a plurality of infrared leds (3b); photosensors (9) provided in a pixel region (4) for detecting reflected light originating from the infrared leds (3b); a sensor row driver circuit (7) configured to supply a sensor drive signal to the photosensors (9); an amplifier circuit (6) configured to amplify a signal read from the photosensors (9) in response to the sensor drive signal and output a photosensor signal; a signal processing circuit (20) configured to process the photosensor signal output from the amplifier circuit (6); and a backlight control circuit (13) configured to control on and off of the infrared leds (3b).
04/18/13
20130093797
Backlight control unit and display device using same and backlight control method
A backlight control unit for a display device includes a processing unit and a backlight control circuit. The display device includes a plurality of lamps and defines a plurality of display regions each display region being illuminated by at least one lamp.
03/21/13
20130069857
Display device and display method
A liquid crystal television (1) includes a backlight (110a) which emits light toward an outside of the liquid crystal television (1) so that an image is displayed on a liquid crystal panel (110b) and a backlight control circuit (110c) which controls whether or not the backlight (110a) emits light. The backlight control circuit (110c) carries out control with respect to backlight (110a) so that a light-emitting period in which the backlight (110a) emits light alternates with a non-light-emitting period in which the backlight (110a) does not emit light..
03/07/13
20130057597
Backlight control method for high dynamic range lcd
A cumulative function of image is obtained according to its gray levels of pixels. This function is then mapped to obtain a backlight modulation function according to a reference line.
01/24/13
20130021386
Apparatus and method for driving backlight, liquid crystal display device and its driving method
A backlight driving apparatus and method, and an lcd device using the same and a driving method thereof are discussed. The backlight driving apparatus includes a backlight unit, a backlight driver, and a backlight controller.
01/17/13
20130016141
Method and apparatus of compensating image in a backlight local dimming system
An apparatus compensates image in a backlight local dimming system for estimating pixels of the image after backlight spreading of a plurality of backlight sources in the backlight local dimming system. The apparatus includes a block dimming value decision unit, a quality/power-saving priority decision unit, a temporal filter, a backlight spread approximation unit, and an image compensation unit.
01/17/13
20130015770
Enhanced resolution of luminance levels in a backlight unit of a display device
Disclosed embodiments relate to techniques for enhancing luminance resolution in a backlight unit. A backlight unit may have light-emitting diode (led) light sources arranged in strings.
01/03/13
20130003176
Display apparatus
A display apparatus includes a display unit that time-divisionally displays a plurality of view point images in n divisions, n being an integer equal to or more than 2, a backlight that irradiates the display unit with image display light, and a separation unit that separates m view point images displayed in the same time slot in the display unit, m being an integer equal to or more than 2. The backlight controllably switches the exit direction of light time-divisionally in synch with the timing of time division display by the display unit, the backlight controllably switching the exit direction of light between n directions..


Popular terms: [SEARCH]

Backlight Control topics: Backlight Control, Liquid Crystal, Integrated Circuit, Hardware Register, Control Bus, Control Unit, Liquid Crystal Display, Control Program, Display Panel, Light Controller, Microprocessor, Stereoscopic Images, Terminal Device, Image Display Apparatus, Optical Sensor

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This listing is a sample listing of patent applications related to Backlight Control for is only meant as a recent sample of applications filed, not a comprehensive history. There may be associated servicemarks and trademarks related to these patents. Please check with patent attorney if you need further assistance or plan to use for business purposes. This patent data is also published to the public by the USPTO and available for free on their website. Note that there may be alternative spellings for Backlight Control with additional patents listed. Browse our RSS directory or Search for other possible listings.
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