Patent ID: 11922897
Assignee: HKC CORPORATION LIMITED
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  Y | IPC G

Claim 12:
13. A display device, comprising:
a power supply module; and
a display module, comprising:
a display panel;
a scan driving circuit; and
a data driving circuit, comprising:
a data signal processing (DSP) unit; and
a digital-to-analog conversion (DAC) unit electrically coupled with the DSP unit, the DAC unit comprising:
a voltage-dividing circuit comprising 2n voltage-dividing signal terminals arranged sequentially from low to high voltage;
a switching circuit comprising 2n switching sub-circuits, each of the 2n switching sub-circuits comprising a receiving terminal, a first output terminal, and a second output terminal, receiving terminals of than switching sub-circuits being electrically coupled to the 2n voltage-dividing signal terminals in one-to-one correspondence; and
a voltage selecting circuit comprising 2n selecting signal terminals, each of the 2n selecting signal terminals being electrically coupled with the first output terminal of one of the 2n switching sub-circuits and the second output terminal of one of the 2n switching sub-circuits, the voltage selecting circuit being configured to receive a data signal from the DSP unit, n being an integer greater than or equal to 2, wherein
the voltage-dividing signal terminal, the first output terminal of the switching sub-circuit, and the selecting signal terminal are conducted according to the data signal to output a first analog voltage; or, the voltage-dividing signal terminal, the second output terminal of the switching sub-circuit, and the selecting signal terminal are conducted according to the data signal to output a second analog voltage, wherein

the scan driving circuit and the data driving circuit are electrically coupled with the display panel to jointly drive the display panel to display different images, wherein the power supply module is disposed on a non-display surface of the display module, and the power supply module is configured to provide a power supply voltage for the display module to display an image;

for a j-th switching sub-circuit, the receiving terminal is electrically coupled to a j-th voltage-dividing signal terminal, the first output terminal is electrically coupled to a j-th selecting signal terminal, the second output terminal is electrically coupled to a 2n-(j−1)-th selecting signal terminal, and the receiving terminal is selectively coupled with the first output terminal or the second output terminal, wherein j is an integer greater than or equal to 1 and less than 2n;
the j-th switching sub-circuit comprises a first transistor and a second transistor, the first transistor and the second transistor each comprise a control terminal, a first terminal, and a second terminal, the control terminal of the first transistor and the control terminal of the second transistor each are configured to receive an enable signal;
the first terminal of the first transistor and the first terminal of the second transistor are electrically coupled to the receiving terminal of the j-th switching sub-circuit and the second terminal of the first transistor is electrically coupled to the first output terminal of the j-th switching sub-circuit, and the second terminal of the second transistor is electrically coupled to the second output terminal of the j-th switching sub-circuit.