49results about How to "Improve uneven lighting" patented technology

An embodiment of the invention discloses a grayscale compensation method and system of an OLED display panel. The method includes: acquiring the actual display brightness of each subpixel of the OLED display panel under an actual input grayscale, and calculating the corresponding relationship between the actual input grayscale of each subpixel and the actual display brightness of each subpixel; determining the target display brightness of each subpixel under a preset input grayscale according to the target brightness of each subpixel under the 255th grayscale and the target gamma value of the OLED display panel; determining the target input grayscale of each subpixel when each subpixel displays the target display brightness according to the corresponding relationship between the actual input grayscale of each subpixel and the actual display brightness of each subpixel; determining a grayscale compensation value according to the target input grayscale of each subpixel and the preset input grayscale. By the grayscale compensation method, light-emitting unevenness among the subpixels of the OLED display panel is improved.

The invention discloses a pixel circuit as well as a driving method, a display panel and a display device thereof. The pixel circuit comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a driving transistor, a first capacitor and a second capacitor. Through the cooperation between all transistors and the capacitors, the pixel circuit as well as the driving method, the display panel and the display device thereof can achieve one of the following benefits at least: the driving current is enabled to be unrelated to the threshold voltage of the driving transistor, the pressure drop of a power supply signal, and the step voltage of the two ends of a light-emitting element; as the influence of the forenamed factors is eliminated, the problem that the conventional display device is uneven in light emission is further improved effectively, and the uniformity of luminance uniformity and the display effect of the display device are improved.

An embodiment of the invention discloses a brightness adjusting method and system of an OLED display panel. The method includes: acquiring the actual display brightness of each subpixel of the OLED display panel under actual input voltage, and calculating the corresponding relationship between the actual input voltage of each subpixel and the actual display brightness; using the average value of the display brightness of all the same-color subpixels of the OLED display panel under preset input voltage as the target display brightness of all the same-color subpixels of the OLED display panel under the preset input voltage; determining the target input voltage of each subpixel when the subpixel displays the target display brightness according to the corresponding relationship between the actual input voltage of each subpixel and the actual display brightness; using the difference value of the target input voltage of each subpixel and the preset input voltage as the voltage compensation value which is fed back to the OLED display panel for voltage compensation. By the brightness adjusting method, light-emitting unevenness among the subpixels of the OLED display panel is improved.

The invention discloses a backlight module and a display device. The backlight module comprises a backboard. The backboard comprises a base and a side frame connected with the base. The base and the side frame form an accommodating space. A plurality of LEDs and a reflective layer are provided in the accommodating space. Multiple LEDs are located on one side of the base facing the light emitting surface of the backlight module. Multiple LEDs are arranged in a matrix. The reflective layer is located on one side of the base facing the light emitting surface of the backlight module. The reflective surface of the reflective layer faces the light emitting surface of the backlight module. The backlight module comprises a light-emitting area and a non-light-emitting area. The non-light-emitting area surrounds the light-emitting area. The light-emitting area comprises a first area and a second area. The first area surrounds the second area. The first area comprises a plurality of LEDs. The second area comprises a plurality of LEDs. The reflectivity of the reflective layer located in the first area is greater than the reflectivity of the reflective layer located in the second area. The display device comprises the above backlight module. The backlight module and the display device provided by the invention can effectively improve the brightness unevenness of the backlight module.

The invention discloses a pixel compensation circuit and a driving method thereof, a display panel and a display device. The pixel compensation circuit comprises a reset module, a data writing module, a compensation module, a driving module and a light emitting component. The voltage threshold of the light emitting device is provided to the driving module via the compensation module, and when the light emitting device is aging, the voltage threshold is increased, so that the driving module can provide larger current to the light emitting device when driving the light emitting device to emit light, and thus brightness of the light emitting device in an aging area is enhanced, and the problem that the display pane emits light non-uniformly is improved.

A backlight module and a display device including the backlight module are provided. The backlight module includes a reflective plate and a plurality of light sources, wherein the reflective plate has a reflective surface and the light sources are disposed on the reflective surface generating light in a direction away from the reflective surface. The reflecting surface includes a plurality of low reflection portions, wherein the reflectivity of the low reflection portion is lower than the reflectivity of other positions on the reflective surface. The low reflection portions are disposed between the light source and adjacent light sources.

The invention discloses an OLED display panel and an OLED display device. The OLED display panel and the OLED display device have the advantages that the OLED display panel is divided into a pluralityof sub-display areas, the storage capacitance is large and the working current is relatively large in the sub-display area far away from one side of a driving area, so that the small working currentat one side, far away from the driving area, of the traditional OLED display panel can be compensated and the non-uniformity of luminescence is improved. Compared with a double-layer SD structure design, the OLED display panel and the OLED display device have the advantages that the manufacturing process is simplified, the production cost is reduced, and the wide applicability of the display device can be improved.

The invention discloses a pixel circuit as well as a driving method, a display panel and a display device thereof. The pixel circuit comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a driving transistor, a first capacitor, a second capacitor and a light-emitting element, through the cooperating driving between all transistors and the two capacitors, the driving current is enabled to be unrelated to the threshold voltage of the driving transistor and the step voltage of the two ends of the light-emitting element finally. According to the pixel circuit as well as the driving method, the display panel and the display device thereof, the influence of undesirable factors is eliminated, the problem that the conventional display device is uneven in light emission is further improved effectively, and the uniformity of luminance and the display effect of the display device are improved.

The invention discloses a pixel circuit as well as a driving method, a display panel and a display device thereof. The pixel circuit comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a driving transistor, a first capacitor, a second capacitor and a light-emitting element, through the cooperating driving between all transistors and the two capacitors, the driving current is enabled to be unrelated to the threshold voltage of the driving transistor and the step voltage of the two ends of the light-emitting element finally. According to the pixel circuit as well as the driving method, the display panel and the display device thereof, the influence of undesirable factors is eliminated, the problem that the conventional display device is uneven in light emission is further improved effectively, and the uniformity of luminance and the display effect of the display device are improved.

The invention discloses a pixel circuit, a driving method, a display panel, and a display device, wherein the pixel circuit includes: a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a driving transistor, and a first capacitor and the second capacitor, through the cooperation between each transistor and the capacitor, the present invention at least achieves one of the following beneficial effects: the drive current is equal to the threshold voltage of the drive transistor itself, the voltage drop of the power supply signal, and the voltage across the two ends of the light-emitting element. Regardless, the influence of the above factors is eliminated, thereby effectively improving the problem of uneven light emission of the display device, and improving the uniformity of light emission and the display effect of the display device.

The invention discloses a pixel compensation circuit, its driving method, a display panel and a display device. The pixel compensation circuit includes: a reset module, a data writing module, a compensation module, a driving module and a light emitting device. The threshold voltage of the light-emitting device is provided to the driving module through the compensation module. When the light-emitting device ages, its threshold voltage will increase, so that the driving module can provide a larger current to the light-emitting device when driving the light-emitting device to emit light. The brightness of the light-emitting device in the aging area is enhanced, and the problem of uneven light emission of the display panel is improved.

An embodiment of the invention discloses a brightness adjusting method and system of an OLED display panel. The method includes: acquiring the actual display brightness of each subpixel of the OLED display panel under actual input voltage, and calculating the corresponding relationship between the actual input voltage of each subpixel and the actual display brightness; using the average value of the display brightness of all the same-color subpixels of the OLED display panel under preset input voltage as the target display brightness of all the same-color subpixels of the OLED display panel under the preset input voltage; determining the target input voltage of each subpixel when the subpixel displays the target display brightness according to the corresponding relationship between the actual input voltage of each subpixel and the actual display brightness; using the difference value of the target input voltage of each subpixel and the preset input voltage as the voltage compensation value which is fed back to the OLED display panel for voltage compensation. By the brightness adjusting method, light-emitting unevenness among the subpixels of the OLED display panel is improved.