Window brightness enhancement for lc display
First Claim
Patent Images
1. A display apparatus (DAP) comprising:
- a liquid crystal display (LCD) for receiving an input display signal (DS) to display an adapted display signal (DSA) being enhanced within a predetermined area (PA) of a display screen (SCR) of the liquid crystal display (LCD) in response to an enhancement control signal (ECS), a lamp driver circuit (LDC) for changing a property of the light emitted by a backlighting lamp (BLL) illuminating the liquid crystal display (LCD), under control of a light control signal (LCS), a data controller (DCO) for adapting the display signal (DS) under control of a data control signal (DCS) to obtain a substantially unchanged display on the display screen (SCR) outside the predetermined area (PA), a light sensor (LS) for measuring the property of the light to obtain a measured property of the light (ML), and an enhancement controller (EC) comprising a first input for receiving the enhancement control signal (ECS) and a second input coupled to the light sensor (LS), for adapting the data control signal (DCS) and the light control signal (LCS), both in response to the enhancement control signal (ECS), and for determining the data control signal (DCS) and/or the light control signal (LCS) in correspondence with the measured property of the light (MPL).
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Abstract
In a LCD monitor, a predetermined part (PA) of the displayed information is highlighted by causing the backlighting to produce more light. The area outside the predetermined area (PA) is kept at a substantially constant brightness by adjusting the video data driving the panel. The actual amount of light produced by the backlighting is measured to obtain a more constant brightness outside the predetermined area (PA).
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Citations
5 Claims
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1. A display apparatus (DAP) comprising:
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a liquid crystal display (LCD) for receiving an input display signal (DS) to display an adapted display signal (DSA) being enhanced within a predetermined area (PA) of a display screen (SCR) of the liquid crystal display (LCD) in response to an enhancement control signal (ECS), a lamp driver circuit (LDC) for changing a property of the light emitted by a backlighting lamp (BLL) illuminating the liquid crystal display (LCD), under control of a light control signal (LCS), a data controller (DCO) for adapting the display signal (DS) under control of a data control signal (DCS) to obtain a substantially unchanged display on the display screen (SCR) outside the predetermined area (PA), a light sensor (LS) for measuring the property of the light to obtain a measured property of the light (ML), and an enhancement controller (EC) comprising a first input for receiving the enhancement control signal (ECS) and a second input coupled to the light sensor (LS), for adapting the data control signal (DCS) and the light control signal (LCS), both in response to the enhancement control signal (ECS), and for determining the data control signal (DCS) and/or the light control signal (LCS) in correspondence with the measured property of the light (MPL). - View Dependent Claims (2, 3)
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4. A system comprising a display apparatus (DAP), and a computer (COM) for generating a display signal (DS) and an enhancement control signal (ECS) indicating a required enhancement of the display signal (DS) within a predetermined area (PA) on a display screen (SCR) of the display apparatus (DAP),
the display apparatus (DAP) comprising: -
a liquid crystal display (LCD) for receiving an input display signal (DS) to display an adapted display signal (DSA) being enhanced within a predetermined area (PA) of the display screen (SCR) of the liquid crystal display (LCD) in response to an enhancement control signal (ECS), a lamp driver circuit (LDC) for changing a property of the light emitted by a backlighting lamp (BLL) illuminating the liquid crystal display (LCD), under control of a light control signal (LCS), a data controller (DCO) for adapting the display signal (DS) under control of a data control signal (DCS) to obtain a substantially unchanged display on the display screen (SCR) outside the predetermined area (PA), a light sensor (LS) for measuring the property of the light to obtain a measured property of the light, and an enhancement controller (EC) comprising a first input for receiving the enhancement control signal (ECS) and a second input coupled to the light sensor (LS), for adapting the data control signal (DCS) and the light control signal (LCS), both in response to the enhancement control signal (ECS), and for determining the data control signal (DCS) and/or the light control signal (LCS) in correspondence with the measured property of the light (MEL).
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5. A method of enhancing a predetermined area (PA) of a display screen (SCR) of a liquid crystal display (LCD) in response to an enhancement control signal (ECS), the method comprising:
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changing (LDC) a property of light emitted by a backlighting lamp (BLL) illuminating the liquid crystal display (LCD), under control of a light control signal (LCS), adapting (DCO) a display signal (DS) under control of a data control signal (DCS) to obtain a substantially unchanged display on the display screen (SCR) outside the predetermined area (PA), measuring (LS) the property of the light, and receiving (EC) the enhancement control signal (ECS) and the measured property of the light (MPL) for adapting (EC) the data control signal (DCS) and the light control signal (LCS), both in response to the enhancement control signal (ECS), and for determining (EC) the data control signal (DCS) and/or the light control signal (LCS) in correspondence with the measured property of the light (MPL).
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Specification