Display device
First Claim
Patent Images
1. A display device comprising:
- a switching regulator control circuit comprising a thin film transistor on a substrate.
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Abstract
A display device according to the present invention includes a switching regulator control circuit formed of TFTs. A digital switching regulator control circuit is composed of an AD converter circuit, a CPU, a pulse generation circuit or the like. An analog switching regulator control circuit is composed of an error amplifier circuit, a triangle wave generation circuit, a PWM comparator or the like. By integrally forming the switching regulator control circuit on a display device, the problem of the conventional portable information equipment as to the reduction in size and weight can be solved.
88 Citations
30 Claims
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1. A display device comprising:
a switching regulator control circuit comprising a thin film transistor on a substrate. - View Dependent Claims (11, 16, 21, 26)
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2. A display device comprising:
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a switching regulator control circuit comprising a thin film transistor on a substrate, wherein a switching element is driven according to an output signal from said switching regulator control circuit to raise or lower the voltage. - View Dependent Claims (12, 17, 22, 27)
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3. A display device comprising:
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a switching regulator control circuit comprising a thin film transistor on a substrate;
a switching element;
an inductor;
a diode; and
a smoothing capacitor, wherein said switching regulator control circuit comprises;
a voltage feed back circuit which feeds back a voltage of said smoothing capacitor; and
a duty control circuit which controls a switching duty of said switching element. - View Dependent Claims (4, 5, 6, 13, 18, 23, 28)
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7. A display device comprising:
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a switching regulator control circuit comprising a thin film transistor on a substrate, wherein said switching regulator control circuit uses an analog signal. - View Dependent Claims (8, 14, 19, 24, 29)
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9. A display device comprising:
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a switching regulator control circuit comprising a thin film transistor on a substrate, wherein said switching regulator control circuit uses a digital signal. - View Dependent Claims (10, 15, 20, 25, 30)
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Specification