Synaptics Corporation

Synaptics Japan Gk

Kazutoshi Aogaki

Hirobumi Furihata

Takashi Nose

Masao Orio

Tomoo Minaki

Akio Sugiyama

Hirohisa Tsuchida

A display device includes a backlight device, and a backlight control circuit. The backlight device includes a plurality of light sources configured to illuminate a plurality of zones of a display panel, respectively. The zones are aligned in a first direction, and each zone includes a plurality of subzones aligned in a second direction perpendicular to the first direction. The backlight control circuit is configured to receive an input image and determine a backlight value for a target light source of the light sources, the target light source corresponding to a target zone of the plurality of zones. Determining the backlight value for the target light source includes: determining local brightness values of respective subzones of the target zone based on the input image; and determining the backlight value for the target light source based on the local brightness values of the subzones of the target zone.

Local dimming for panel display devices using one-dimensional (1D) light source array

A method includes processing input image data to produce resulting image data corresponding to a resulting image such that a first region of the resulting image is filled with black pixels. The method further includes driving a display panel based on the resulting image data. The method further includes producing black pixel pattern data indicative of an arrangement of the black pixels in the resulting image. The method further includes controlling, based on the resulting image data and the black pixel pattern data, luminance levels of one or more of a plurality of light sources of a backlight device configured to illuminate the display panel.

Local dimming for display devices with image warping function

A display device includes, a backlight device, and a backlight control circuit. The backlight device includes a plurality of light sources configured to illuminate a display panel. The backlight control circuit is configured to apply a filter to a target part of the input image to generate a filtered image part. The target part of the input image is displayed in a corresponding region of the display panel illuminated by a target light source of the plurality of light sources. The backlight control circuit is further configured to control a luminance level of the target light source based on a maximum pixel luminance level of the filtered image part and a local average picture level (APL) of the filtered image part.

Backlight control for display devices

A display driver that includes image processing circuitry and a source driver. The image processing circuitry is configured to perform a burn-in compensation to determine a first compensated luminance value for a first pixel in a first area of a display panel based at least in part on a first accumulated luminance value for the first pixel. The first area has a first pixel layout. The image processing circuitry is further configured to scale a second accumulated luminance value for a second pixel in a second area of the display panel to determine a scaled accumulated luminance value. The second area has a second pixel layout different from the first pixel layout. The image processing circuitry is further configured to perform a burn-in compensation to determine a second compensated luminance value for the second pixel based at least in part on the scaled accumulated luminance value.

System and method for variable area-based compensation of burn-in in display panels

A display driver IC includes a chromatic aberration correction (CAC) circuit and a drive circuit. The CAC circuit is configured to receive a first input color plane for a first color. The first input color plane includes a center region and a peripheral region that surrounds the center region of the first input color plane. The CAC circuit is further configured to generate an output color plane. The output color plane includes a center region and a scaled peripheral region that surrounds the center region of the output color plane. The center region of the output color plane is the same as the center region of the first input color plane. The scaled peripheral region is generated by scaling the peripheral region. The drive circuit is configured to update a display panel based on the output color plane.

Device and method for chromatic aberration correction

A display device that includes a display panel, a backlight device, and a display driver. The backlight device includes light sources configured such that color of light emitted from the light sources varies with luminance levels. The display driver is configured to: process a first input grey level of a first color for a target pixel based on a specified luminance level of a corresponding light source to determine a first output grey level of the first color for the target pixel; and configured to process a second input grey level of a second color for the target pixel based on the specified luminance level to determine a second output grey level of the second color for the target pixel. The first output grey level and the second output grey level are determined to compensate for a change in color of light emitted from the corresponding light source.

Color compensation for panel display device using light source array for backlighting

A display device includes a display panel, a backlight module, and backlight control circuitry. The backlight module is configured to illuminate the display panel, the backlight module comprising a plurality of light sources. The backlight control circuitry is configured to control first luminance of a first light source of the plurality of light sources based at least in part on a first weighted average of brightness values for a first set of pixels of the display panel.

A display driver includes a display panel, a backlight array, and backlight control circuitry. The backlight array includes a plurality of light sources and is configured to illuminate the display panel. The backlight control circuitry is configured to determine first base luminance for a first light source of the plurality of light sources based at least in part on pixel data for a first set of pixels associated with the first light source. The backlight control circuitry is further configured to determine first compensated luminance for the first light source by modifying the first base luminance based at least in part on a position of the first light source in the backlight array. The backlight control circuitry is further configured to control light emission of the first light source based at least in part on the first compensated luminance.

Backlight control for providing compensated luminance to display devices

A display device includes a display panel, a backlight device, a drive circuit, and a backlight control circuit. The backlight device includes a plurality of light sources configured to illuminate the display panel. The drive circuit is configured to update the display panel based on an input image. The backlight control circuit is configured to apply a filter to a target part of the input image to generate a filtered image part. The target part of the input image is displayed in a corresponding region of the display panel illuminated by a target light source of the plurality of light sources. The backlight control circuit is further configured to control a luminance level of the target light source based on a maximum pixel luminance level of the filtered image part and a local average picture level (APL) of the filtered image part.

A display device includes a display panel, a backlight module, and a display driver. The backlight module includes a plurality of light sources to illuminate a plurality of zones defined for the display panel. The display driver is configured to store a first light source arrangement type of a first zone of the plurality of zones. The first light source arrangement type is based on an arrangement of one or more light sources with respect to the first zone. The display driver is further configured to process first input pixel data for a first target pixel of the display panel based on the first light source arrangement type of the first zone to generate first output pixel data. The first target pixel is located in the first zone. The display driver is further configured to update the first target pixel based on the first output pixel data.

Device and method for pixel luminance compensation for display devices with backlight light source array

A method includes generating first demura data comprising first correction amounts for pixels in a first region of a display panel. The first region has a first pixel density. The method further includes generating second demura data comprising second correction amounts for pixels in a second region of the display panel. The second region has a second pixel density different from the first pixel density. The method further includes generating modified second demura data by modifying the second correction amounts by a first factor. The method further comprises compressing the first demura data and the modified second demura data to generate compressed demura data. The method further includes providing the compressed demura data and factor information indicative of the first factor to a display driver.

Demura processing for a display panel having multiple regions with different pixel densities

A display driver that drives a display panel comprises storage circuitry, color addition processing circuitry, and drive circuitry. The storage circuitry stores F subpixel data acquired from color coordinate data indicating color coordinates of a displayed color in a predetermined color space displayed on the display panel when an R subpixel, a G subpixel, and a B subpixel in each of a plurality of pixels of the display panel are driven with drive signals corresponding to a minimum grayscale value and an F subpixel in each of the plurality of pixels which displays an additional color other than a primary color R, a primary color G, and a primary color B is driven with a drive signal corresponding to a maximum grayscale value. The color addition processing circuitry generates output FRGB data from input RGB data, in response to the F subpixel data stored in the storage circuitry.

Display driver, image processing circuitry, and method

A display driver includes gamma curve control circuitry and a converter controller. The gamma curve control circuitry is configured to generate a first gamma curve for a first display brightness value (DBV), and a second gamma curve for a second DBV lower than the first DBV. The converter controller is configured to control a digital-analog converter (DAC) configured to perform digital-analog conversion of an input image data. Further, the converter controller is configured to adjust an analog signal voltage amplitude of the DAC based on a range of an output voltage associated with the second gamma curve.

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Tokyo, Japan

Kazutoshi Aogaki