CONTROL APPARATUS AND CONTROL METHOD THEREOF

• US 20130021383A1
• Filed: 07/05/2012
• Published: 01/24/2013
• Est. Priority Date: 07/19/2011
• Status: Active Grant

• Current Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Original Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Inventors: Osawa, Seiji, Kagaya, Sosuke
• Granted Patent: US 9,582,241 B2
• Time in Patent Office: Days
• US Class Current: 345/672
• CPC Class Codes: G06F 3/147 using display panels
• CPC Class Codes: G09G 2320/066 for control of contrast
• CPC Class Codes: G09G 2340/045 Zooming at least part of an image, i.e. enlarging it or shrinking it
• CPC Class Codes: G09G 2370/04 Exchange of auxiliary data, i.e. other than image data, between monitor and graphics controller
• CPC Class Codes: G09G 5/003 Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto specific for a CRT G09G1/165; for a flat panel G09G3/2092
• CPC Class Codes: G09G 5/39 Control of the bit-mapped memory

Abstract

A control apparatus, according to the present invention, for controlling a display apparatus having a liquid crystal panel and a backlight which is configured from a plurality of divided regions and which emits light, with one or more divided regions as one light-emitting unit, based on decided emission brightness of each light-emitting unit, comprises a control unit that sets, upon displaying a second image formed by enlarging a first image, a size of the light-emitting unit larger in comparison to a case of displaying the first image according to an enlargement ratio of the second image relative to the first image.

Claims

1. A control apparatus for controlling a display apparatus having a liquid crystal panel and a backlight which is configured from a plurality of divided regions and which emits light, with one or more divided regions as one light-emitting unit, based on decided emission brightness of each light-emitting unit, comprising:

a control unit that sets, upon displaying a second image formed by enlarging a first image, a size of the light-emitting unit larger in comparison to a case of displaying the first image according to an enlargement ratio of the second image relative to the first image.

2. The control apparatus according to claim 1, wherein

in an initial state, the backlight emits light, with one divided region as one light-emitting unit, based on decided emission brightness of each light-emitting unit, and

the control unit sets a size of the light-emitting unit to a size of the divided regions upon displaying the first image, and changes a size of the light-emitting unit to a size obtained by enlarging a size of the divided regions based on an enlargement ratio of the second image relative to the first image upon displaying the second image.

3. The control apparatus according to claim 2, wherein

the display apparatus further comprises a decision unit that decides emission brightness of the backlight, for each divided region, by using statistics of an image to be displayed in that divided region,

the control apparatus further comprises a storage unit that stores statistics of each light-emitting unit of the first image upon displaying the first image, and

upon displaying the second image, the control unit instructs the display unit so that the decision unit uses statistics of a light-emitting unit, which are stored in the storage unit, corresponding to that light-emitting unit as statistics of the divided regions included in the enlarged light-emitting unit.

4. The control apparatus according to claim 2, wherein

the display apparatus further comprises:

an acquisition unit that acquires, for each divided region, statistics of an image to be displayed in the divided region; and

a decision unit that decides emission brightness of the backlight, for each divided region, by using the statistics acquired by the acquisition unit, wherein

upon displaying the second image, the control unit instructs the display apparatus so that the acquisition unit acquires the statistics of the divided regions included in the enlarged light-emitting unit from the regions of the light-emitting unit.

5. The control apparatus according to claim 1, wherein

the second image is displayed on at least a part of the region of a screen, and

the control unit enlarges the size of the light-emitting unit of at least the region where the second image is displayed.

6. The control apparatus according to claim 1, wherein the control unit performs processing of enlarging the size of the light-emitting unit when a plurality of images having mutually different enlargement ratios relative to the first image are displayed together.

7. The control apparatus according to claim 1, wherein the control apparatus further comprises a region decision unit that decides the region of the image to be displayed so that an edge of the image and an edge of the divided regions coincide.

8. The control apparatus according to claim 1, wherein

the control apparatus further comprises a selection unit that selects any mode from among a plurality of modes including:

a first mode of setting one divided region as one light-emitting unit; and

a second mode of setting, upon displaying the second image, the size of the light-emitting unit larger in comparison to a case of displaying the first image according to the enlargement ratio of the second image relative to the first image.

9. A control method for a control apparatus for controlling a display apparatus having a liquid crystal panel and a backlight which is configured from a plurality of divided regions and which emits light, with one or more divided regions as one light-emitting unit, based on decided emission brightness of each light-emitting unit,

the method comprising:

a step of controlling to set, upon displaying a second image formed by enlarging a first image, a size of the light-emitting unit larger in comparison to a case of displaying the first image according to an enlargement ratio of the second image relative to the first image.

10. The control method for a control apparatus according to claim 9, wherein

in an initial state, the backlight emits light, with one divided region as one light-emitting unit, based on decided emission brightness of each light-emitting unit, and

in the control step, a size of the light-emitting unit is set to a size of the divided regions upon displaying the first image, and a size of the light-emitting unit is changed to a size obtained by enlarging a size of the divided regions based on an enlargement ratio of the second image relative to the first image upon displaying the second image.

11. The control method for a control apparatus according to claim 10, wherein

the display apparatus further comprises a decision unit that decides emission brightness of the backlight, for each divided region, by using statistics of an image to be displayed in the divided region,

the control method for a control apparatus further comprises a step of storing statistics of each light-emitting unit of the first image upon displaying the first image, and

in the control step, upon displaying the second image, a command is issued to the display unit so that the decision unit uses statistics of a light-emitting unit, which are stored in the storage step, corresponding to that light-emitting unit as statistics of the divided regions included in the enlarged light-emitting unit.

12. The control method for a control apparatus according to claim 10, wherein

the display apparatus further comprises:

an acquisition unit that acquires, for each divided region, statistics of an image to be displayed in the divided region; and

a decision unit that decides emission brightness of the backlight, for each divided region, by using the statistics acquired by the acquisition unit, wherein

in the control step, upon displaying the second image, a command is issued to the display apparatus so that the acquisition unit acquires the statistics of the divided regions included in the enlarged light-emitting unit from the regions of that light-emitting unit.

13. The control method for a control apparatus according to claim 9, wherein

the second image is displayed on at least a part of the region of a screen, and

in the control step, the size of the light-emitting unit of at least the region where the second image is displayed is enlarged.

14. The control method for a control apparatus according to claim 9, wherein

in the control step, processing of enlarging the size of the light-emitting unit when a plurality of images having mutually different enlargement ratios relative to the first image are displayed together is performed.

15. The control method for a control apparatus according to claim 9, further comprising:

a step of deciding the region of the image to be displayed so that an edge of the image and an edge of the divided regions coincide.

16. The control method for a control apparatus according to claim 9, further comprising a step of selecting any mode from among a plurality of modes including:

a first mode of setting one divided region as one light-emitting unit; and

a second mode of setting, upon displaying the second image, the size of the light-emitting unit larger in comparison to a case of displaying the first image according to the enlargement ratio of the second image relative to the first image.