Display apparatus
AssigneeFujitsu Hitachi Plasma Display Limited
InventorsAyahito Kojima, Shigeki Kameyama, Hirohito Kuriyama, Yoshikazu Kanazawa, Toshio Ueda
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Abstract
A display apparatus, that can prevent thermal destruction and burning with a simple structure, has been disclosed. In the apparatus it is judged that there is possibility of a pattern, whose area with high brightness is small, being displayed frequently, when a state in which the total light emission pulse number remains large occurs with high frequency, and if such a state is detected, the total light emission pulse number (sustain frequency) is reduced to prevent the thermal destruction and burning.
Claims26
A display apparatus, comprising plural cells in which light emission is carried out selectively, wherein the display brightness is determined by the number of times of said light emission and the total number of times of light emission in each cell of the display frame of a screen are varied, characterized in that said apparatus comprises:
- a sustain frequency judgment part that judges the occurrence frequency of said total number of times of light emission by monitoring the change in said total number of times of light emission;
- and a control part that controls said total number of times of light emission based on the judgment result of said sustain frequency judgment part.
A display apparatus as set forth in claim in 12, wherein said sustain frequency judgment part judges whether a first state in which said total number of times of light emission is over a fixed first threshold value occurs more than a fixed first frequency, and whether a second state in which said total number of times of light emission is under a fixed second threshold value occurs more than a fixed second frequency, and said cooling fan is started or accelerated when said sustain frequency judgment part judges that said first state occurs more than said fixed first frequency, and terminated or decelerated when said sustain frequency judgment part judges that said second state occurs more than said fixed second frequency.
A display apparatus, comprising plural cells in which light emission is carried out selectively, wherein the display brightness is determined by the number of times of said light emission and the total number of times of light emission in each cell of the display frame of a screen are varied, characterized in that a first judgment part that monitors the weighted mean of the display data in each cell of the display frame of a screen and judges the occurrence frequency of said weighted mean, and a control part that controls said total number of times of light emission based on the judgment results of said first judgment part, are provided.
Dependencies are inferred from the claim text.