Signal processing apparatus, signal processing method, and display apparatus

Patent metadata

Field	Value
Publication number	US-2025087144-A1
Application number	US-202418889518-A
Country	US
Kind code	A1
Filing date	Sep 19, 2024
Priority date	May 1, 2020
Publication date	Mar 13, 2025
Grant date	—

Abstract

The present technology relates to a signal processing apparatus, a signal processing method, and a display apparatus that may reduce the effect of deterioration in element of a display panel. Provided is a signal processing apparatus including a signal processing unit configured to acquire, in changing a video signal from a low luminance display signal to a high luminance display signal by luminance enhancement, an accumulated load increase amount obtained by measuring and accumulating amounts of increase in load on a display panel caused by luminance enhancement, and adaptively control, in reference to the accumulated load increase amount acquired, a first gain for improving luminance of the video signal, according to a degree of effect of deterioration in element of the display panel. The present technology is applicable to self-luminous display apparatuses, for example.

First claim

1 - 20 . (canceled)

21 . A display apparatus comprising:
a signal processing circuitry configured to process a video signal; and a display panel configured to display video based on the video signal,
wherein
the signal processing circuitry is configured to:
acquire an accumulated load increase amount based on amounts of increase in load on the display panel caused by luminance enhancement,
control luminance of the video signal in reference to the accumulated load increase amount acquired, and
limit a length of time of performing luminance enhancement.

22 . The display apparatus according to claim 21 , wherein the signal processing circuitry is configured to acquire the accumulated load increase amount based on a surface temperature of the display panel.

23 . The display apparatus according to claim 21 , wherein the signal processing circuitry is configured to acquire the accumulated load increase amount based on a current flowing through the display panel.

24 . The display apparatus according to claim 21 , wherein the display panel is a self-luminous display panel.

25 . The display apparatus according to claim 21 , wherein the signal processing circuitry is further configured to:
add a first gain for improving luminance of the video signal to a second gain that is used for luminance enhancement to enhance the luminance of the video signal, and use, as the first gain, a value based on a third gain linked to the accumulated load increase amount.

26 . The display apparatus according to claim 25 , wherein the signal processing circuitry is configured to use, as the first gain, a value obtained by multiplying the third gain by a fourth gain that is used as a reference for luminance improvement.

27 . The display apparatus according to claim 21 , wherein the signal processing circuitry is configured to:
calculate, according to the load that is increased due to luminance enhancement, an additional value for accumulation, and add together the additional value calculated of each image frame to calculate an accumulated value of load increase amounts.

28 . The display apparatus according to claim 27 , wherein the signal processing circuitry is configured to calculate a larger additional value for a higher load to make a correlation with an element deterioration amount.

29 . The display apparatus according to claim 27 , wherein the signal processing circuitry is configured to calculate a constant additional value to measure a length of time in which luminance enhancement has been carried out.

30 . The display apparatus according to claim 27 , further comprising a memory configured to store data regarding the accumulated value.

31 . The display apparatus according to claim 27 , wherein the signal processing circuitry is configured to calculate the accumulated value of load increase amounts of each of predetermined regions on a screen of the display panel.

32 . The display apparatus according to claim 25 , wherein the signal processing circuitry is configured to perform control for reducing the first gain when an accumulated value of load increase amounts exceeds a predetermined value in a case where luminance enhancement has been carried out over a period longer than a predetermined period.

33 . The display apparatus according to claim 25 , wherein the signal processing circuitry is configured to control, according to a maximum value of the accumulated value of each of predetermined regions on a screen of the display panel, the first gain for an entirety of the screen.

34 . The display apparatus according to claim 25 , wherein the signal processing circuitry is configured to control, according to the accumulated value of each of predetermined regions on a screen of the display panel, the first gain for each of the predetermined regions.

35 . The display apparatus according to claim 22 , wherein the display panel is provided with one or multiple temperature sensors configured to measure the surface temperature.

36 . The display apparatus according to claim 21 , wherein the display panel is an OLED display panel.

37 . The display apparatus according to claim 24 , wherein the display panel includes display pixels each including white, red, green and blue sub pixels.

38 . The display apparatus according to claim 36 , wherein the display panel includes display pixels each including red, green and blue sub pixels.

39 . The display apparatus according to claim 21 , further comprising an input interface configured to receive broadcast content, communication content, or recorded content.

40 . The display apparatus according to claim 21 , wherein the display apparatus is a television.

Assignees

• Saturn Licensing Llc

Inventors

• ZEN Masao
• KIKUCHI Syunsuke
• Miki Daisuke
• Nukiyama Kazuhiro
• Kobayashi Kazutaka
• Konuma Yasushi
• Uchida Kazuki

Classifications

• G09G2320/0285

  using tables for spatial correction of display data · CPC title

• G09G2320/0233

  Improving the luminance or brightness uniformity across the screen · CPC title

• G09G2320/048

  using evaluation of the usage time · CPC title

• G09G2330/028

  Generation of voltages supplied to electrode drivers in a matrix display other than LCD · CPC title

• G09G2320/046

  Dealing with screen burn-in prevention or compensation of the effects thereof · CPC title