JPWO2022249311A5

JPWO2022249311A5 -

Info

Publication number: JPWO2022249311A5
Application number: JP2023523786A
Authority: JP
Filing date: 2021-05-26
Publication date: 2023-07-13

Description

本開示に係る表示装置は、表示部と、複数の光源を有し、光源からの光で表示部を照明するバックライトと、表示部を駆動する表示ドライバと、入力した画像データに基づいて表示部に画像を表示する信号処理部と、を備えた表示装置であって、表示ドライバとバックライトが有する光源とを接続する信号線を備え、信号処理部は、表示ドライバから出力された点灯用信号を、信号線を通じて、バックライトが有する光源に印加させることにより、入力した画像データに基づいて決定した光源の点灯を制御し、表示部は、マトリクス状に配置された複数の画素と、複数の画素における画素行ごとに設けられて、電圧を印加する画素行を選択するための複数の走査線と、複数の画素における画素列ごとに設けられて、選択された画素行の画素に電圧を印加するための複数のデータ線と、を有し、表示ドライバは、複数のデータ線に電圧を印加するソースドライバと、複数の走査線に電圧を印加するゲートドライバと、を有し、信号線は、ソースドライバとバックライトが有する光源とを接続し、信号処理部は、ソースドライバからの電圧を、信号線を通じてバックライトが有する光源に印加し、バックライトにおける光源は、発光ダイオードであり、発光ダイオードは、カソード端子が接地され、抵抗を介して信号線がアノード端子に接続されている。 A display device according to the present disclosure includes a display unit, a plurality of light sources, a backlight that illuminates the display unit with light from the light sources, a display driver that drives the display unit, and a display based on input image data. and a signal processing unit for displaying an image in the display device, the display device comprising a signal line connecting a display driver and a light source of the backlight, wherein the signal processing unit receives a lighting signal output from the display driver. By applying a signal to the light source of the backlight through the signal line, the lighting of the light source determined based on the input image data is controlled. a plurality of scanning lines provided for each pixel row in the pixels for selecting a pixel row to which a voltage is applied; a plurality of data lines for applying voltages, the display driver having a source driver for applying voltages to the plurality of data lines and a gate driver for applying voltages to the plurality of scanning lines; connects the source driver and the light source of the backlight, the signal processing unit applies the voltage from the source driver to the light source of the backlight through the signal line, the light source of the backlight is a light emitting diode, The light-emitting diode has a cathode terminal grounded and a signal line connected to an anode terminal via a resistor .

Claims

a display unit;
a backlight having a plurality of light sources and illuminating the display section with light from the light sources;
a display driver that drives the display unit;
a signal processing unit that displays an image on the display unit based on input image data;
A display device comprising
a signal line connecting the display driver and the light source of the backlight;
The signal processing unit controls lighting of the light source determined based on input image data by applying a voltage from the display driver to the light source of the backlight through the signal line,
The display unit includes a plurality of pixels arranged in a matrix, a plurality of scanning lines provided for each pixel row in the plurality of pixels for selecting a pixel row to which a voltage is applied, and the plurality of pixels. and a plurality of data lines provided for each pixel column in and for applying a voltage to the pixels of the selected pixel row,
The display driver has a source driver that applies voltages to the plurality of data lines and a gate driver that applies voltages to the plurality of scanning lines,
the signal line connects the source driver and the light source of the backlight;
The signal processing unit applies a voltage from the source driver to the light source of the backlight through the signal line,
the light source in the backlight is a light emitting diode;
The light emitting diode has a cathode terminal grounded and the signal line connected to the anode terminal via a resistor.
A display device characterized by:

The display device according to claim 1 , wherein the signal processing section changes the voltage from the source driver so that the gamma curve of the image to be displayed on the display section matches a target gamma curve.

3. The display device according to claim 2 , wherein the signal processing section changes the voltage from the source driver for each gradation of an image to be displayed on the display section.

The signal processing unit changes the voltage from the source driver every several gradations of an image to be displayed on the display unit, and changes the relationship between gradation and luminance between gradations without changing the voltage from the source driver. 3. The display device according to claim 2 , wherein the linear interpolation is performed.

a plurality of pixels arranged in a matrix; a plurality of scanning lines provided for each pixel row in the plurality of pixels for selecting a pixel row to which a voltage is applied; a display unit provided with a plurality of data lines for applying voltages to pixels in a selected pixel row;
a backlight having a plurality of light sources and illuminating the display section with light from the light sources;
a source driver that applies a voltage to the plurality of data lines;
a signal processing unit that displays an image on the display unit based on input image data;
A display method for a display device comprising
a step in which the signal processing unit gamma-corrects the relationship between gradation and luminance in the input image data;
determining, by the source driver, voltages to be applied to the plurality of data lines and voltages to be applied to the light source based on gamma-corrected image data;
a step in which the signal processing unit determines whether or not the gamma curve of the image to be displayed on the display unit matches a target gamma curve;
changing the voltage from the source driver if both gamma curves do not match;
A display method comprising: when the gamma curves match, the signal processing unit causes the display unit to display an image, and controls lighting of the light source of the backlight.