Gamma reference voltage generation circuit and display device
View Patent ↗A gamma reference voltage generation circuit and a display device are disclosed. The gamma reference voltage generation circuit includes a reference voltage generation unit; and multiple resistor units; wherein, the reference voltage generation unit is disposed on a printed circuit board; the multiple resistor units receive a reference voltage from the reference voltage generation unit and output a first gamma reference voltage; the multiple resistor units are formed at a region separated from the printed circuit board. The gamma reference voltage generation circuit of the present invention utilizes voltage-dividing resistors at a region outside the printed circuit board to reduce the space of the printed circuit board being occupied and reduce the manufacturing cost.
1. A gamma reference voltage generation circuit, comprising:
a reference voltage generation unit; and
multiple resistor units;
wherein, the reference voltage generation unit is disposed on a printed circuit board; the multiple resistor units receive a reference voltage from the reference voltage generation unit and output a first gamma reference voltage; the multiple resistor units are formed at a region separated from the printed circuit board;
wherein the printed circuit board is connected to a display panel through a chip on film of source electrode side (S-COF);
wherein the multiple resistor units are disposed at a non-display region of the display panel, and the non-display region is connected with the S-COF;
the first gamma reference voltage is inputted into the S-COF and is electrically connected to a display region of the display panel through the S-COF.
2. The gamma reference voltage generation circuit according to claim 1 , wherein, an amplification unit is further provided, the amplification unit is disposed on the printed circuit board, and the amplification unit amplifies the first gamma reference voltage in order to enhance a signal driving ability, and outputs a second gamma reference voltage, and the second gamma reference voltage is electrically connected to the display region of the display panel through the S-COF.
3. The gamma reference voltage generation circuit according to claim 2 , wherein, each resistor unit of the multiple resistor units is a single resistor.
4. The gamma reference voltage generation circuit according to claim 3 , wherein, between each two adjacent resistor units of the multiple resistor units, a signal output terminal is provided for outputting the first gamma reference voltages.
5. The gamma reference voltage generation circuit according to claim 2 , wherein, the first gamma reference voltage or the second gamma reference voltage is connected to a display region of the display panel through a chip on film of source electrode side.
6. The gamma reference voltage generation circuit according to claim 2 , wherein, the display device is a thin-film transistor liquid-crystal display.
7. A display device, comprising:
a display panel having a non-display region and a display region;
a gamma reference voltage generation circuit, comprising:
a reference voltage generation unit; and
multiple resistor units;
wherein, the reference voltage generation unit is disposed on a printed circuit board; the multiple resistor units receive a reference voltage from the reference voltage generation unit and output a first gamma reference voltage; the multiple resistor units are formed at a region separated from the printed circuit board;
wherein the printed circuit board is connected to the display panel through a chip on film of source electrode side (S-COF);
wherein the multiple resistor units are disposed at the non-display region of the display panel, and the non-display region is connected with the S-COF;
the first gamma reference voltage is inputted into the S-COF and is electrically connected to a display region of the display panel through the S-COF.