PORTABLE DISPLAY DEVICE AND DISPLAY METHOD OF PORTABLE DISPLAY DEVICE

• US 20080204443A1
• Filed: 02/26/2008
• Published: 08/28/2008
• Est. Priority Date: 02/26/2007
• Status: Abandoned Application

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Morimoto, Shigeo, Nakamura, Atsushi, Ohno, Yasukazu, Iwasaki, Masao
• Application Number:
  US12/037,493
• Publication Number:
  US 20080204443A1
• Time in Patent Office: Days
• US Class Current: 345/211
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 2330/022 in absence of operation, e.g. no data being entered during a predetermined time
• CPC Class Codes: G09G 3/3406 Control of illumination source illumination devices structurally associated with liquid crystal cells G02F1/1336

Abstract

According to one embodiment, there is provided a portable display device including a recording section which records a video file, a decoder section which decodes the video file and outputs a video/audio signal, a display section which displays a video picture on a screen based on the video/audio signal from the decoder section, a backlight section which irradiates a back side of the display section, and a control section which determines the video file to be reproduced based on attribute information and turns off the irradiation of the backlight section based on a determined result.

Claims

1. A portable display device comprising:

a recording section which records a video file;

a decoder section which decodes the video file and outputs a video/audio signal;

a display section which displays a video picture on a screen based on the video/audio signal from the decoder section;

a backlight section which irradiates a back side of the display section; and

a control section which determines the video file to be reproduced based on attribute information and turns off the irradiation of the backlight section based on a determined result.

2. The portable display device according to claim 1, wherein the control section operates the backlight section when a video picture is displayed on the screen based on a video file recorded in a first area of the recording section, and turns off the backlight section when a video picture is displayed on the screen based on a video file recorded in a second area different from the first area of the recording section.

3. The portable display device according to claim 1, wherein the control section turns off the backlight section when the video file to be reproduced is present in a previously provided list for turning off the backlight.

4. The portable display device according to claim 1, wherein the control section makes a determination based on genre information of a video file to be reproduced, and turns off the backlight section according to a determined result.

5. The portable display device according to claim 1, further comprising:

an illuminance sensor which is provided to a main body of the portable display device and outputs a detected signal according to a level of illuminance,

wherein the control section turns off the backlight section based on a detected signal from the illuminance sensor.

6. The portable display device according to claim 1, further comprising:

a distance measuring sensor which is provided to a main body of the portable display device and outputs a detected signal obtained by detecting a distance to an object to be detected,

wherein the control section turns off the backlight section based on the detected signal from the distance measuring sensor.

7. The portable display device according to claim 1, further comprising:

a touch sensor which is provided to a main body of the portable display device and outputs a detected signal obtained by detecting a contact with a sensor element,

wherein the control section turns off the backlight section based on the detected signal from the touch sensor.

8. The portable display device according to claim 1, further comprising:

an illuminance sensor which is provided to a main body of the portable display device and outputs a detected signal according to a level of illuminance;

a distance measuring sensor which is provided to the main body of the portable display device and outputs a detected signal obtained by detecting a distance to an object to be detected; and

a touch sensor which is provided to the main body of the portable display device and outputs a detected signal showing presence/non-presence of contact with a sensor section,

wherein the control section turns off the backlight section based on the detected signals from the illuminance sensor, the distance measuring sensor and the touch sensor.

9. The portable display device according to claim 1, wherein the control section turns off illumination of the backlight section based on at least one of a storage place of the memory section where the video file to be reproduced is stored, a determination whether the video file to be reproduced is present in a previously provided list for turning off the backlight, a determination based on genre information of the video file to be reproduced, and the detected signals from the sensors provided to the portable display device when setting is made so that the backlight section is turned off by a setting signal to be given.

10. A display method of a portable display device, comprising:

recording a video file in a memory area;

decoding the video file so as to output a video/audio signal; and

making a determination based on attribute information of the video file during output of the audio signal based on the video/audio signal so as to turn off a backlight section for irradiating a back side of a display section for displaying a video picture on a screen based on a determined result.