WAIVER AND FOURTH AMENDMENT TO CREDIT AGREEMENT

Exhibit 10.1

WAIVER AND FOURTH AMENDMENT TO

CREDIT AGREEMENT

This WAIVER AND FOURTH AMENDMENT TO CREDIT AGREEMENT (“ Amendment ”) is entered into as of December 10, 2007, among Planar Systems, Inc., an Oregon corporation (the “ Borrower ”), each lender from time to time party hereto (collectively, the “ Lenders ” and individually, a “ Lender ”), and BANK OF AMERICA, N.A. , as Agent.

RECITALS

A. Borrower, Agent and Lender are parties to that certain Credit Agreement entered into as of December 16, 2003, as amended by a First Amendment to Credit Agreement entered into as of December 21, 2004, a Second Amendment to Credit Agreement entered into as of October 21, 2005, and a Third Amendment to Credit Agreement dated as of May 23, 2007 (the “ Credit Agreement ”). Bank of America, N.A. is the sole Lender as of the date of this Waiver and Amendment.

B. An Event of Default has occurred in that as of September 28, 2007, the end of Borrower’s fiscal year, Borrower was not in compliance with Section 6.12(d) of the Credit Agreement relating to the required EBITDA.

C. Borrower has requested that Agent and Lender waive such Event of Default and agree to amend the Credit Agreement as set forth herein. Borrower, Agent and Lender have agreed to do so.

NOW THEREFORE, the parties agree as follows:

AGREEMENT

1. Recitals . The Recitals are true.

2. Definitions . Capitalized terms used herein and not otherwise defined shall have the meaning given in the Credit Agreement.

3. Waiver. The Event of Default described in Recital B above is waived,

4. Amendment to the Definition of “Applicable Rate” in Section 1.01 of the Credit Agreement . The definition of “Applicable Rate” in Section 1.01 of the Credit Agreement is amended in its entirety to read:

“ Applicable Rate ” means from time to time the following percentages per annum, based upon the Fixed Charge Coverage Ratio as set forth in the most recent Compliance Certificate received by Agent pursuant to Section 6.02(a) :

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Any increase or decrease in the Applicable Rate resulting from a change in the Fixed Charge Coverage Ratio shall become effective commencing on the first Business Day of the month following the date a Compliance Certificate is delivered pursuant to Section 6.02(a) ; provided , however , that if no Compliance Certificate is delivered when due in accordance with such Section, then Pricing Level 1 shall apply as of the first Business Day of the month following the date such Compliance Certificate was required to have been delivered and shall continue in effect until the first Business Day of the month following the date such Compliance Certificate is in fact delivered. Pricing Level 1 shall apply through the 1st Business Day of the month following the date a Compliance Certificate is delivered after December 28, 2007.

5. Amendment to the Definition of “Fixed Charge Coverage Ratio” in Section 1.01 of the Credit Agreement . The definition of “Fixed Charge Coverage Ratio” in Section 1.01 of the Credit Agreement is amended in its entirety to read:

“ Fixed Charge Coverage Ratio ” means, as of any date of determination, the ratio of (a) EBITDA for the period of one, two, three or four prior fiscal quarters most recently ended for which Borrower has delivered financial statements pursuant to Section 6.01(a ) or (c) , minus (i) taxes paid in cash during such period, plus (ii) (A) for the fiscal quarter ending December 28, 2007, integration costs not to exceed $900,000, (B) for the two fiscal quarter period ending March 28, 2008, integration costs not to exceed $1,250,000, (C) for the three fiscal quarter period ending June 27, 2008, integration costs not to exceed $1,600,000 and (D) for the four fiscal quarter period ending September 26, 2008, integration costs not to exceed $1,900,000, to (b) the sum of (i) interest charges actually paid in cash during such period plus (ii) principal payments scheduled to have been paid during such period on Funded Debt (not including payments required by Section 2.05(b)), plus (iii) cash payments required to be made during such period on any Swap Contract, reduced by cash receipts during such period from any Swap Contract, plus (iv) cash expenditures for fixed assets net of disposition of fixed assets.

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6. Amendment to Section 6.12(c) of the Credit Agreement . Section 6.12(c) of the Credit Agreement is amended in its entirety to read:

(c) Fixed Charge Coverage Ratio . Maintain on a consolidated basis a Fixed Charge Coverage Ratio of at least 0.55:1.0 for the fiscal quarter ending December 28, 2007, and at least 0.73:1.0 for the two fiscal quarter period ending March 28, 2008, and at least 1.0:1.0 for the three fiscal quarter period ending June 27, 2008, and at least 1.15:1.0 for the four fiscal quarter period ending September 26, 2008.

7. Deletion of Section 6.12(d) of the Credit Agreement . Section 6.12(d) of the Credit Agreement relating to minimum EBITDA is deleted in its entirety.

8. Amendment to Section 6 of the Credit Agreement . Section 6 of the Credit Agreement is amended by adding the following section thereto:

6.17 Consultant . Prior to January 14, 2008 Borrower shall employ a business consultant acceptable to Agent to study Borrower’s business plans and make recommendations to Borrower and Agent concerning Borrower’s operations. An executed contract to engage such consultant shall be delivered to Agent prior to January 14, 2008. Borrower’s failure to engage such consultant and provide a copy of the executed contract to Agent by such date shall be an Event of Default, in addition to the Events of Default described in Section 8.01 .

9. Deletion of Certain Sections of Article VII. The following Sections contained in Article VII of the Credit Agreement are deleted:

Section 7.03(f) relating to permitted indebtedness.

Section 7.05(g) relation to permitted dispositions.

Section 7.06(c) relating to permitted Restricted Payments

10. Amendment to Section 7.01(i) of the Credit Agreement . Section 7.01(i) of the Credit Agreement is amended in its entirety to read:

(i) Liens securing Indebtedness permitted under Section 7.03(e) ; provided that (i) such Liens do not at any time encumber any property other than the property financed by such Indebtedness, (ii) the Indebtedness secured th